Aliphatic polyester copolymer and process for producing the same, biodegradable resin molding based on aliphatic polyester, and lactone-containing resin
First Claim
1. A high molecular weight aliphatic polyester copolymer having a weight average molecular weight of 40,000 or more, comprising a low molecular weight aliphatic polyester copolymer (D) having a weight average molecular weight of 5,000 or more whose molecular chain is made of a repeating unit (P) represented by the general formula (1):
- —
(—
CO—
R1—
COO—
R2—
O—
)—
(1) (wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and a repeating unit (q) represented by the general formula (2);
—
(—
CO—
R3—
O—
)—
(2) (wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms), and a bifunctional coupler (E) represented by the general formula (7);
X1—
R7—
X2
(7) (wherein X1 and X2 are each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group, R7 is a single bond, an aliphatic group having 1 to 20 carbon atoms, or an aromatic group, provided that X1 and X2 may be the same or different in chemical structure), the low molecular weight aliphatic polyester copolymer (D) being coupled to each other with the coupler (E) in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the copolymer (D).
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Abstract
A high molecular weight aliphatic polyester copolymer, a high molecular weight aliphatic polyester copolymer containing polylactic acid; process for industrially producing these copolymers; composition of these copolymers; and various uses thereof. These copolymers have practical properties which make the copolymers moldable. They are free from the problem of plasticizer bleeding and can be degraded by microorganisms present in soils or water. They give moldings, such as sheets and films, which combine a sufficient strength with tear resistance. When the copolymers are ones having a branched structure, they give a molding having excellent mechanical properties. The moldings obtained from compositions containing either of these copolymers are excellent in elongation and biodegradability and have a satisfactory balanc therebetween. In particular, blending with one or more other biodegradable resins gives a molding having better moldability.
72 Citations
107 Claims
-
1. A high molecular weight aliphatic polyester copolymer having a weight average molecular weight of 40,000 or more, comprising a low molecular weight aliphatic polyester copolymer (D) having a weight average molecular weight of 5,000 or more whose molecular chain is made of a repeating unit (P) represented by the general formula (1):
-
—
(—
CO—
R1—
COO—
R2—
O—
)—
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and a repeating unit (q) represented by the general formula (2);
—
(—
CO—
R3—
O—
)—
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms), and a bifunctional coupler (E) represented by the general formula (7);
X1—
R7—
X2
(7)(wherein X1 and X2 are each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group, R7 is a single bond, an aliphatic group having 1 to 20 carbon atoms, or an aromatic group, provided that X1 and X2 may be the same or different in chemical structure), the low molecular weight aliphatic polyester copolymer (D) being coupled to each other with the coupler (E) in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the copolymer (D). - View Dependent Claims (2, 3, 4, 5, 6, 84, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107)
-
-
7. A method of producing a high molecular weight aliphatic polyester copolymer, comprising the steps of
(a) condensation-polymerizing three components of (A) an aliphatic dicarboxylic acid represented by general formula (3): -
R4—
OCO—
R1—
COO—
R5
(3)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, R4 and R5 represent each a hydrogen atom, or an aliphatic group having 1 to 6 carbon atoms or an aromatic group), anhydride thereof or a diester form thereof, (B) an aliphatic diol represented by general formula (4);
HO—
R2—
OH
(4)(wherein R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and (C) a hydroxycarboxylic acid or an ester form thereof represented by general formula (5);
R6OCO—
R3—
OH
(5)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms, and R6 represents a hydrogen atom or an aliphatic group having 1 to 6 carbon atoms, or an aromatic group), or (C) a lactone represented by general formula (6);
(wherein, R3 represents a divalent aliphatic group having 1 to 10 carbon atoms) to synthesize a low molecular weight aliphatic polyester copolymer (D) having a weight average molecular weight of 5,000 or more having a molecular chain made of a repeating unit (P) represented by general formula (1);
(—
CO—
R1—
COO—
R2—
O—
)—
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and a repeating unit (Q) represented by the general formula (2);
—
(—
CO—
R3—
O—
)—
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms), and (b) adding 0.1 to 5 parts by weight of a bifunctional coupler (E) represented by general formula (7);
X1—
R7—
X2
(7)(wherein X1 and X2 represent each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group and R7 represents a single bond, or an aliphatic group having 1 to 20 carbon atoms or an aromatic group, provided that X1 and X2 may be the same or different in chemical structure) to 100 parts by weight of the low molecular weight aliphatic polyester copolymer (D) in a molten state to increase the weight average molecular weight thereof to 40,000 or more. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A high molecular weight aliphatic polyester copolymer having a weight average molecular weight of 40,000 or more, comprising molecular chain made of a repeating unit (P) represented by the general formula (1):
-
—
(—
CO—
R1—
COO—
R2—
O—
)—
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), a repeating unit (Q) represented by the general formula (2);
—
(—
CO—
R3—
O—
)—
(2)(wherein R3 represents a divalent aliphatic group having 2 to 10 carbon atoms), and a repeating unit (R) represented by the general formula (19);
—
(—
CO—
CR11R12—
O—
)—
(19)(wherein R11 and R12 each represent a hydrogen atom or a monovalent aliphatic group having 1 to 6 carbon atoms). - View Dependent Claims (17, 18, 19, 20, 21, 22)
X1—
R7—
X2
(7)(wherein X1 and X2 are each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group, R7 is a single bond, an aliphatic group having 1 to 20 carbon atoms, or an aromatic group, provided that X1 and X2 may be the same or different in chemical structure), the low molecular weight aliphatic polyester copolymer (F) having molecules being coupled to each other with the coupler (E) in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the copolymer (F).
-
-
18. A high molecular weight aliphatic polyester copolymer according to claim 16, characterized in that the general formula (1) contains a succinic acid residue and/or an adipic acid residue.
-
19. A high molecular weight aliphatic polyester copolymer according to claim 16, characterized in that the general formula (1) contains an ethylene glycol residue and/or a 1,4-butanediol residue.
-
20. A high molecular weight aliphatic polyester copolymer according to claim 16, characterized in that the general formula (2) contains an ε
- -oxycaproic acid residue.
-
21. A high molecular weight aliphatic polyester copolymer according to claim 16, characterized in that the general formula (19) contains an lactic acid residue.
-
22. A high molecular weight aliphatic polyester copolymer according to claim 17, characterized in that the reactive group of the bifunctional coupler (E) represented by the general formula (7) is an isocyanate group;
- an isothiocyanate group;
an epoxy group;
or a mixture of these.
- an isothiocyanate group;
-
23. A method of producing a high molecular weight aliphatic polyester copolymer, comprising condensation-polymerizing four components of (A) an aliphatic dicarboxylic acid represented by general formula (3):
-
R4—
OCO—
R1—
COO—
R5
(3)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, R4 and R5 represent each a hydrogen atom, or an aliphatic group having 1 to 6 carbon atoms or an aromatic group), anhydride thereof or a diester form thereof, (B) an aliphatic diol represented by general formula (4);
HO—
R2—
OH
(4)(wherein R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), (C-1) a hydroxycarboxylic acid represented by general formula (5);
R6OCO—
R3—
OH
(5)(wherein R3 represents a divalent aliphatic group having 2 to 10 carbon atoms, and R6 represents a hydrogen atom or an aliphatic group having 1 to 6 carbon atoms, or an aromatic group), or an ester form thereof, or a lactone thereof forming acyclic monomeric ester thereof, and (C-2) a hydroxycarboxylic acid represented by general formula (20) R13—
OCO—
CR11R12—
OH
(20)(wherein R11 and R12 represent a hydrogen atom or a monovalent aliphatic group having 1 to 6 carbon atoms, and R13 represents a hydrogen atom or an aliphatic group having 1 to 6 carbon atoms or an aromatic group), an ester form thereof or a lactide forming a cyclic dimeric ester, to synthesize a high molecular weight aliphatic polyester copolymer having a weight average molecular weight based on Polystyrene of 40,000 or more having a molecular chain made of a repeating unit (P) represented by general formula (1);
(—
CO—
R1—
COO—
R2—
O—
)—
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R represents a divalent aliphatic group having 2 to 12 carbon atoms), a repeating unit (Q) represented by general formula (2);
—
(—
CO—
R3—
O—
)—
(2)(wherein R3 represents a divalent aliphatic group having 2 to 10 carbon atoms), and a repeating unit (R) represented by general formula (19);
—
(—
CO—
CR11R12—
O)—
(19)(wherein R11 and R12 represent a hydrogen atom or a monovalent aliphatic group having 1 to 6 carbon atoms). - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
X1—
R7—
X2
(7)(wherein X1 and X2 represent each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group and R7 represents a single bond, an aliphatic group having 1 to 20 carbon atoms or an aromatic group, provided that X1 and X2 may be the same or different in chemical structure) to 100 parts by weight of the low molecular weight aliphatic polyester copolymer (F) in a molten state to increase the weight average molecular weight thereof to 40,000 or more.
-
-
25. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that as the aliphatic dicarboxylic acid represented by the general formula (3), the acid anhydride thereof, or the ester form thereof, at least one is selected from the group consisting of succinic acid, adipic acid and dimethyl succinate.
-
26. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that as the aliphatic diol represented by the general formula (4), at least one is selected from the group consisting of ethylene glycol, 1,4-butanediol and diethylene glycol.
-
27. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that the lactone is ε
- -caprolactone.
-
28. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that the lactide is lactic acid, ester thereof, or lactide.
-
29. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that molar ratio at the time of charging raw materials satisfies expression (i)
0.02≦ - [C-2]/([A]+[C-1]+[C-2])≦
0.70
(i)(wherein [A] represents the mole number of the component (A) used, [C-1] represents the mole number of the component (C-1) used, and [C-2] represents the mole number of the component (C-2) used).
- [C-2]/([A]+[C-1]+[C-2])≦
-
30. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that molar ratio at the time of charging raw materials satisfies expression (ii)
0.02< - [C-1]/([A]+[C-1]+[C-2])≦
0.40
(ii)(wherein [A] represents the mole number of the component (A) used, [C-1] represents the mole number of the component (C-1) used, and [C-2] represents the mole number of the component (C-2) used).
- [C-1]/([A]+[C-1]+[C-2])≦
-
31. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that the polymerization step is performed at a temperature of 200 to 250°
- C. and at a pressure of atmospheric pressure to 0.2 mmHg (26.6 Pa).
-
32. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that molar ratio at the time of charging raw materials satisfies expression (iii)
1.0≦ - [B]/[A]≦
2.0
(iii)(wherein [A] represents the mole number of the component (A) used, and [B] represents the mole number of the component (B) used).
- [B]/[A]≦
-
33. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that an organotitanium compound and an organic or inorganic phosphorus compound are used as a catalyst.
-
34. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 23, characterized in that the organotitanium compound is used in an amount of 0.005 to 0.1% by weight based on succinic acid or a derivative thereof and the organic or inorganic phosphorus compound is used in an amount of 1 to 30% by weight based on the organotitanium compound.
-
35. A high molecular weight aliphatic polyester copolymer characterized in that the molecular chain thereof is made of a repeating unit (P) represented by the general formula (1):
-
(—
CO—
R1—
COO13 R2—
O—
)
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and a repeating unit (Q) represented by the general formula (2);
(—
CO—
R3—
O—
)
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms), wherein at least one of the divalent aliphatic groups represented by R1, R2 and R3 contains a branched divalent aliphatic group in an amount of 0.01 to 50 mol % based on 100 mol % of the sum of the divalent aliphatic groups represented by R1, R2 and R3. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42)
X1—
R7—
X2
(7)(wherein X1 and X2 represent each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group and R7 represents a single bond or an aliphatic group having 1 to 20 carbon atoms, or an aromatic group, provided that X1 and X2 may be the same or different), the low molecular weight aliphatic polyester copolymer being coupled to each other with the coupler (E) in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the copolymer.
-
-
37. A high molecular weight aliphatic polyester copolymer according to claim 35 or 36, characterized in that the weight average molecular weight is 40,000 to 700,000.
-
38. A high molecular weight aliphatic polyester copolymer according to claim 35 or 36, characterized in that R1 is a succinic acid residue [(CH2)2] and/or an adipic acid residue [(CH2)4].
-
39. A high molecular weight aliphatic polyester copolymer according to claim 35 or 36, characterized in that R2 is an ethylene glycol residue [(CH2)2] and/or a 1,4-butanediol residue [(CH2)4].
-
40. A high molecular weight aliphatic polyester copolymer according to any one of claims 35 to 39, characterized in that R3 is an ε
- -oxycaproic acid residue.
-
41. A high molecular weight aliphatic polyester copolymer according to anyone of claims 35 to 39, wherein the branched divalent aliphatic group is (i) a succinic acid residue, a glutaric acid residue, an adipic acid residue, a pimellic acid residue, a suberic acid residue, an azelaic acid residue, or a sebacic acid residue;
- (ii) an ethylene glycol residue, a 1,3-propanediol residue or a 1,3- or 1,4-butanediol residue;
or (iii) a glycolic acid residue, a hydroxypropionic acid residue, a hydroxybutyric acid residue, a hydroxyvaleric acid residue, or a hydroxycaproic acid residue, the one or more branched divalent aliphatic groups being substituted by an alkyl group having 1 to 4 carbon atoms or an alkoxyl group.
- (ii) an ethylene glycol residue, a 1,3-propanediol residue or a 1,3- or 1,4-butanediol residue;
-
42. A high molecular weight aliphatic polyester copolymer according to claim 36, characterized in that the reactive group of the bifunctional coupler (E) represented by the general formula (7) is an isocyanate group;
- an isothiocyanate group;
an epoxy group;
an oxazolidine group;
an oxazolone group or an oxazinone group;
an aziridine group;
or a mixture of these.
- an isothiocyanate group;
-
43. A method of producing a high molecular weight aliphatic polyester copolymer, characterized by comprising condensation-polymerizing (A) an aliphatic dicarboxylic acid represented by general formula (3):
-
R4—
OCO—
R1—
COO—
R5
(3)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms and R4 and R5 represent each a hydrogen atom, or an aliphatic group having 1 to 6 carbon atoms or an aromatic group, provided that R4 and R5 maybe the same or different), an acid anhydride thereof or a diester form thereof, (B) an aliphatic diol represented by general formula (4);
HO—
R2—
OH
(4)(wherein R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and (C) a hydroxycarboxylic acid or an ester form thereof represented by general formula (5);
R6OCO—
R3—
OH
(5)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms, and R6 represents a hydrogen atom or an aliphatic group having 1 to 6 carbon atoms, or an aromatic group), or (C) a lactone represented by general formula (6);
(wherein, R3 represents a divalent aliphatic group having 1 to 10 carbon atoms), the copolymer having a molecular chain made of a repeating unit (P) represented by general formula (1);
(—
CO—
R1—
COO—
R2—
O—
)
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and a repeating unit (Q) represented by the general formula (2);
(—
CO—
R3—
O—
)
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms), in which at least one of the divalent aliphatic groups represented by R1, R2 and R3 contains a branched divalent aliphatic group in an amount of 0.01 to 50 mol % based on 100 mol % of the sum of the divalent aliphatic groups represented by R1, R2 and R3. - View Dependent Claims (44, 45, 46, 47, 48, 49, 52)
X1—
R7—
X2
(7)(wherein X1 and X2 represent each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group and R7 represents a single bond, or an aliphatic group having 1 to 20 carbon atoms or an aromatic group, provided that X1 and X2 may be the same or different) to 100 parts by weight of the low molecular weight aliphatic polyester copolymer in a molten state to increase the weight average molecular weight thereof to 40,000 or more.
-
-
45. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 44, characterized in that in the coupler (E) represented by the general formula (7), X1 and X2 are one or more groups selected from the group consisting of reactive groups represented by formulae (9) to (11):
-
46. A method of producing a high molecular weight aliphatic polyester copolymer according to claim 44, characterized in that in the coupler (E) represented by the general formula (7), X1 and X2 are one or more groups selected from the group consisting of reactive groups represented by formulae (12) to (15):
-
47. A method of producing a high molecular weight aliphatic polyester copolymer according to any one of claims 43 to 46, characterized in that the molar ratio at the time of charging raw materials satisfies the following expression
1.0< - [B]/[A]≦
2.0
(8)(wherein [A] represents the mole number of the aliphatic dicarboxylic acid, the acid anhydride thereof, or the ester form thereof, and [B] represents the mole number of the aliphatic diol).
- [B]/[A]≦
-
48. A method of producing a high molecular weight aliphatic polyester copolymer according to any one of claims 43 to 47, characterized in that the molar ratio at the time of charging raw materials satisfies the following expression
0.02≦ - [C]/([A]+[C])≦
0.40
(16)(wherein [A] represents the mole number of the aliphatic dicarboxylic acid, the acid anhydride thereof, or the ester form thereof used, and [C] represents the mole number of the hydroxycarboxylic acid, the ester form thereof, or lactone used).
- [C]/([A]+[C])≦
-
49. A method of producing a high molecular weight aliphatic polyester copolymer according to any one of claims 43 to 48, characterized in that the content of the aliphatic dicarboxylic acid and the aliphatic carboxylic acid contained in the aliphatic dicarboxylic acid diester (A) as an impurity is retained so as to be 0.1 mol % or less based on the aliphatic dicarboxylic acid diester.
-
52. A biodegradable aliphatic polyester copolymer according to claim 48 or 51, characterized in that the weight average molecular weight thereof is 30,000 or more.
-
50. A biodegradable aliphatic polyester copolymer wherein the molecular chain thereof is made of a repeating unit (P) represented by the general formula (1):
-
(—
CO—
R—
COO—
R2—
O—
)p
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms, and p represents the molar fraction of the unit in the molecular chain), a repeating unit (Q) represented by the general formula (2);
(—
CO—
R3—
O—
)q
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms and q represents the molar fraction of the unit in the molecular chain), and a repeating unit (R) represented by the general formula (1′
);
(—
CO—
R4—
COOR5—
O)r
(1′
)(wherein R4 represents a divalent aliphatic group having 1 to 20 carbon atoms, R5 represents a divalent aliphatic group having 2 to 20 carbon atoms containing at least one ether bond or an alicyclic skeleton in the main chain thereof, and “
r”
represents a molar fraction of the unit in the molecular chain), wherein the sum of “
p”
, “
q” and
“
r”
is 1, the value of “
q”
is in the range of 0.02 to 0.30, and the value of “
r”
is in the range of 0.001 to 0.40.- View Dependent Claims (51, 53, 54, 55, 56, 57)
X1—
R6—
X2
(7)(wherein X1 and X2 represent each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group and R6 represents a single bond, or an aliphatic group having 1 to 20 carbon atoms, or an aromatic group, provided that X1 and X2 may be the same or different), the low molecular weight aliphatic polyester copolymer being coupled to each other with the coupler (E) in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the copolymer.
-
-
53. A biodegradable aliphatic polyester copolymer according to claim 50 or 51, characterized in that R1 and R4 are a succinic acid residue [(CH2)2] and/or an adipic acid residue [(CH2)4] (R1 and R4 may be the same or different).
-
54. A biodegradable aliphatic polyester copolymer according to claim 50 or 51, characterized in that R2 is an ethylene glycol residue [(CH2)2] and/or a 1,4-butanediol residue [(CH2)4].
-
55. A biodegradable aliphatic polyester copolymer according to claim 50 or 51, characterized in that R3 is an ε
- -oxycaproic acid residue.
-
56. A biodegradable aliphatic polyester copolymer according to claim 50 or 51, characterized in that R5 is a diethylene glycol residue and/or a cyclohexane dimethanol residue.
-
57. A biodegradable aliphatic polyester copolymer according to claim 51, characterized in that the reactive group of the bifunctional coupler (E) represented by the general formula (7) is an isocyanate group;
- an isothiocyanate group;
an epoxy group;
an oxazoline group;
an oxazolone group or an oxazinone group;
an aziridine group;
or a mixture of these.
- an isothiocyanate group;
-
58. A method of producing a biodegradable aliphatic polyester copolymer, whose molecular chain is made of a repeating unit (P) represented by the general formula (1):
-
(—
CO—
R—
COO—
R2—
O—
)p
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms, and “
p”
represents the molar fraction of the unit in the molecular chain),a repeating unit (Q) represented by the general formula (2);
(—
CO—
R3—
O—
)q
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms and “
q”
represents the molar fraction of the unit in the molecular chain), anda repeating unit (R) represented by the general formula (1′
);
(—
CO—
R4—
COO—
R5—
O—
)r
(11)(wherein R4 represents a divalent aliphatic group having 1 to 20 carbon atoms, R5 represents a divalent aliphatic group having 1 to 20 carbon atoms containing at least one ether bond or alicyclic skeleton in the main chain thereof, and “
r”
represents a molar fraction of the unit in the molecular chain), in which the sum of “
p”
, “
q” and
“
r”
is 1, the value of “
q”
is in the range of 0.02 to 0.30, and the value of “
r”
is in the range of 0.001 to 0.40, the method comprising condensation-polymerizing (A) an aliphatic dicarboxylic acid, represented by general formula (3);
R7—
OCO—
R1—
COO—
R8
(3)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms and R7 and R8 represent a hydrogen atom, or an aliphatic group having 1 to 6 carbon atoms or an aromatic group, provided that R7 and R8 may be the same or different), or an acid anhydride thereof or a diester form thereof, (B) an aliphatic diol represented by general formula (4);
HO—
R2—
OH
(4)(wherein R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and (A′
) an aliphatic dicarbonxylic acid represented by general formula (3′
);
R9—
OCO—
R4—
COO—
R10
(3′
)(wherein R4 represents a divalent aliphatic group having 1 to 20 carbon atoms and R9 and R10 represent a hydrogen atom, or an aliphatic group having 1 to 6 carbon atoms or an aromatic group, provided that R9 and R10 may be the same or different), or an acid anhydride thereof or a diester form thereof, (C) an aliphatic diol represented by general formula (4′
);
HO—
R5 OH
(4′
)(wherein R5 represents a divalent aliphatic group having 2 to 20 carbon atoms containing at least one ether bond or an alicyclic skeleton in the main chain thereof), and (D) a hydroxycarboxylic acid represented by general formula (5);
R11OCO—
R3—
OH
(5)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms, and R11 represents a hydrogen atom or an aliphatic group having 1 to 6 carbon atoms or an aromatic group) or an ester form thereof, or (D) a lactone represented by general formula (6) (wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms) (provided that (A) and (A′
) may be the same or different).- View Dependent Claims (59, 60, 61, 62, 63, 64)
X1—
R6—
X2
(7)(wherein X1 and X2 represent each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group and R6 represents a single bond, or an aliphatic group having 1 to 20 carbon atoms or an aromatic group, provided that X1 and X2 maybe the same or different) to 100 parts by weight the low molecular weight aliphatic polyester copolymer in a molten state to increase the weight average molecular weight thereof to 30,000 or more.
-
-
60. A method of producing a biodegradable aliphatic polyester copolymer according to claim 59, characterized in that in the coupler (E) represented by the general formula (7), X1 and X2 are one or more groups selected from the group consisting of reactive groups represented by formulae (9) to (11):
-
61. A method of producing a biodegradable aliphatic polyester copolymer according to claim 59, characterized in that in the coupler (E) represented by the general formula (7), X1 and X2 are one or more groups selected from the group consisting of reactive groups represented by the general formulae (12) to (15):
-
62. A method of producing a biodegradable aliphatic polyester copolymer according to claim 58 or 59, characterized in that the molar ratio at the time of charging raw materials satisfies the following expressions
1.0≦ - [(B)+(C)]/[(A)+(A′
)]≦
1.1 and 0.02≦
[(D)]/[(A)+(A′
)+(D)]≦
0.30(wherein (A) and (A′
) ((A) and (A′
) may be the same or different) represent the mole numbers of the aliphatic dicarboxylic acid, acid anhydride thereof or ester form thereof, (B) represents the mole number of the aliphatic diol, (C) represents the mole number of the aliphatic diol containing an ether bond in the main chain, and (D) represents the mole number of the hydroxycarboxylic acid or ester form thereof or lactone used).
- [(B)+(C)]/[(A)+(A′
-
63. A method of producing a biodegradable aliphatic polyester copolymer according to claim 58 or 59, characterized in that the molar ratio at the time of charging raw materials satisfies the following expressions
1.0≦ - [(B)+(C)]/[(A)+(A′
)])≦
2.0 and 0.02≦
[(D)]/[(A)+(A′
)+(D)]≦
0.30(wherein (A) and (A′
) ((A) and (A′
) may be the same or different) represent the mole numbers of the aliphatic dicarboxylic acid, acid anhydride thereof or ester form thereof, (B) represents the mole number of the aliphatic diol, (C) represents the mole number of the aliphatic diol containing an ether bond, and (D) represents the mole number of the hydroxycarboxylic acid or ester form thereof or lactone used).
- [(B)+(C)]/[(A)+(A′
-
64. A method of producing a biodegradable aliphatic polyester copolymer according to claim 58 or 59, characterized in that the content of the aliphatic dicarboxylic acid and the aliphatic carboxylic acid contained in the aliphatic dicarboxylic acid diester ((A) and (A′
- )) as an impurity is retained so as to be 0.1 mol % or less based on the aliphatic dicarboxylic acid diester.
-
65. An aliphatic polyester satisfying the relationship expressed by mathematical expressions (i) to (iii) described below in measurement of elongation viscosity at a temperature of 150°
- C. and a strain rate in the range of 0.15 to 0.20 sec−
1;
α
=Δ
lnλ
n/Δ
ε
=(lnλ
n2−
lnλ
n1)/(ε
2−
ε
1)≧
0.15
(i) λ
n=/λ
/λ
1
(ii) ε
=ln(I/I0)
(iii)(wherein α
represents a parameter that indicates the degree of strain hardenability, λ
n represents a nonlinear parameter, λ
represents elongation viscosity in the nonlinear region, λ
1 represents elongation viscosity in the linear region, ε
represents amount of elongation strain according to Hencky, I0 and I represent lengths of a sample at elongation times 0 and t, respectively, and suffix numbers, 2 and 1, in λ
n2, λ
n1, ε
2, and ε
1 indicate values at elongation times t2 and t1, respectively).- View Dependent Claims (66, 67, 68, 69)
(CO—
R1—
COO—
R2—
O)
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and a repeating unit (Q) represented by general formula (2);
(CO—
R3—
O)
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms).
- C. and a strain rate in the range of 0.15 to 0.20 sec−
-
70. A method of producing an aliphatic polyester having a branched structure whose molecular chain is constituted by a repeating unit (P) represented by general formula (1):
-
—
(—
CO—
R1—
COO—
R2—
O)—
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and a repeating unit (Q) represented by general formula (2);
—
(—
CO—
R3—
O—
)—
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms), the method being characterized by comprising a polymerization reaction of (A) an aliphatic dicarboxylic acid represented by general formula (3);
R4 OCO—
R1COO—
R5
(3)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms and R4 and R5 represent each a hydrogen atom, or an aliphatic group having 1 to 12 carbon atoms or an aromatic group) an acid anhydride thereof or a diester form thereof, (B) an aliphatic diol represented by general formula (4);
HO—
R2—
OH
(4)(wherein R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and (C) a hydroxycarboxylic acid represented by general formula (5);
R6OCO—
R3—
OH
(5)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms, and R6 represents a hydrogen atom or an aliphatic group having 1 to 6 carbon atoms), or an ester form thereof, or a lactone represented by general formula (6);
(wherein, R3 represents a divalent aliphatic group having 1 to 10 carbon atoms) (what is represented by the general formula (5) or the general formula (6) is defined as (C)). - View Dependent Claims (71, 72, 73)
-
-
74. A lactone-containing resin, characterized in that the resin is (c) a lactone-containing resin comprising:
-
(a) an aliphatic polyester copolymer having a weight average molecular weight of 30,000 or more and having a molecular chain constituted by a repeating unit (P) represented by general formula (1);
—
(—
CO—
R1—
COO—
R2—
O—
)—
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and a repeating unit (Q) derived from lactone and represented by general formula (2);
—
(—
CO—
R3—
O—
)—
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms);
(b) another biodegradable resin optionally added; and
(d) a resin additive optionally added, and that the aliphatic polyester copolymer (a) which is one of the constituents of the lactone-containing resin (c) has been subjected to radiation irradiation treatment singly or together with at least one of the other constituents. - View Dependent Claims (75, 76, 77, 78, 79, 80, 81, 82, 83)
-
-
85. A biodegradable resin molding molded from an aliphatic polyester biodegradable resin composition comprising an aliphatic polyester copolymer having a weight average molecular weight of 40,000 or more and having a molecular chain constituted by a repeating unit (P) represented by general formula (1):
-
—
(—
CO—
R1—
COO—
R2—
O—
)—
(1)(wherein R1 represents a divalent aliphatic group having 1 to 12 carbon atoms, and R2 represents a divalent aliphatic group having 2 to 12 carbon atoms), and a repeating unit (Q) represented by general formula (2);
—
(—
CO—
R3—
O—
)—
(2)(wherein R3 represents a divalent aliphatic group having 1 to 10 carbon atoms), and another biodegradable resin. - View Dependent Claims (86, 87, 88, 89)
X1—
R7—
X2
(7)(wherein X1 and X2 represent each a reactive group capable of forming a covalent bond by reaction with a hydroxyl group or a carboxyl group and R7 represents a single bond, or an aliphatic group having 1 to 20 carbon atoms or an aromatic group, provided that X1 and X2 may be the same or different in chemical structure).
-
-
87. A biodegradable resin composition according to claim 85 or 86, characterized in that the general formula (1) is a structure that is produced by condensation reaction from an aliphatic carboxylic acid containing a succinic acid residue and/or an adipic acid residue and an aliphatic glycol containing an ethylene glycol residue and/or a 1,4-butanediol residue.
-
88. A biodegradable resin composition according to claim 85 or 86, characterized in that the general formula (2) represents at least one residual selected from the group consisting of ε
- -caprolactone, 4-methylcaprolactone, 3,5,5-trimethylcaprolactone, 3,3,5-trimethylcaprolactone, β
-propiolactone, γ
-butyrolactone, δ
-valerolactone, and enantolactone.
- -caprolactone, 4-methylcaprolactone, 3,5,5-trimethylcaprolactone, 3,3,5-trimethylcaprolactone, β
-
89. A biodegradable resin composition according to claim 86, characterized in that the reactive group of the bifunctional coupler (E) represented by the general formula (7) is an isocyanate group;
- an isothiocyanate group;
an epoxy group;
an oxazoline group;
an oxazolone group or an oxazinone group;
an aziridine group;
or a mixture thereof.
- an isothiocyanate group;
Specification