Crosslinked water-soluble polymer dispersions
First Claim
1. A method of producing an aqueous dispersion of a water-soluble polymer, comprising the step of:
- radically polymerizing the following monomers in aqueous solution at a temperature of 0°
-100°
C.;
(a1) 50-99.999 wt. % of at least one water-soluble monomer selected from the group consisting of a salt of (meth)acrylic acid of formula IV;
##STR15## (meth)acrylic acid, (meth)acrylamide of formula V;
##STR16## and a monomer of formula VI;
##STR17## where R'"'"' is hydrogen or methyl, O.sup.⊕
is an alkali metal ion, or ammonium ionor O.sup.⊕
is another monovalent positively charged ion;
RIII is hydrogen or methyl, RIV and RV, independently, are hydrogen or a C1 -C5 alkyl group or a functionalized C1 -C5 alkyl group;
Z1 is O, NH, or NR4, where R4 is as an alkyl group with 1-4 carbon atoms; and
L is the group ##STR18## where L1 and L4 are an alkylene group or a hydroxyalkylene group with 2-6 carbon atoms;
L2, L3, L5, L6, and L7, independently, are hydrogen or an alkyl group with 1-6 carbon atoms; and
Z is a halogen, acetate, or SO4 CH3(a2) 0.01-1 wt. % of at least one crosslinking monomer containing at least 2 ethylenically unsaturated radically polymerizable groups;
(a3) 0-30 wt. % of at least one hydrophobic monomer; and
(a4) 0-20 wt. % of at least one amphiphilic monomer;
in the presence of at least one polymer dispersant, to form said water-soluble polymer in a dispersion;
wherein the sum of the amounts of monomers (a1), (a2), (a3), and (a4) is 100% by weight of the monomers, the weight average molecular weight of said water-soluble polymer is at least 500,000 Dalton, and said water-soluble polymer is incompatible with said polymer dispersant.
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Abstract
A method of producing low-viscosity water-based water-soluble polymer dispersions having a high concentration of the principal substance is achieved by polymerizing the following monomer components,
(a1) 50-99.999 wt. % of at least one water-soluble monomer;
(a2) 0.001-1 wt. % of at least one crosslinking monomer with at least two ethylenically unsaturated radically polymerizable groups;
(a3) 0-30 wt. %, particularly 1-25 wt. %, of at least one hydrophobic monomer; and
(a4) 0-25 wt. %, particularly 0.1-15 wt. %, of at least one amphiphilic monomer,
in aqueous solution, in the presence of at least one polymer dispersant, to form a polymer (A), where the sum of the amounts of the components represented by the monomers (a1), (a2), (a3), and (a4) is 100 wt. % of the monomers, the weight average molecular weight of the resulting polymer (A) is at least 500,000 Dalton, and polymer (A) is incompatible with the dispersant.
71 Citations
25 Claims
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1. A method of producing an aqueous dispersion of a water-soluble polymer, comprising the step of:
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radically polymerizing the following monomers in aqueous solution at a temperature of 0°
-100°
C.;(a1) 50-99.999 wt. % of at least one water-soluble monomer selected from the group consisting of a salt of (meth)acrylic acid of formula IV;
##STR15## (meth)acrylic acid, (meth)acrylamide of formula V;
##STR16## and a monomer of formula VI;
##STR17## where R'"'"' is hydrogen or methyl, O.sup.⊕
is an alkali metal ion, or ammonium ionor O.sup.⊕
is another monovalent positively charged ion;RIII is hydrogen or methyl, RIV and RV, independently, are hydrogen or a C1 -C5 alkyl group or a functionalized C1 -C5 alkyl group; Z1 is O, NH, or NR4, where R4 is as an alkyl group with 1-4 carbon atoms; and L is the group ##STR18## where L1 and L4 are an alkylene group or a hydroxyalkylene group with 2-6 carbon atoms; L2, L3, L5, L6, and L7, independently, are hydrogen or an alkyl group with 1-6 carbon atoms; and Z is a halogen, acetate, or SO4 CH3 (a2) 0.01-1 wt. % of at least one crosslinking monomer containing at least 2 ethylenically unsaturated radically polymerizable groups; (a3) 0-30 wt. % of at least one hydrophobic monomer; and (a4) 0-20 wt. % of at least one amphiphilic monomer; in the presence of at least one polymer dispersant, to form said water-soluble polymer in a dispersion; wherein the sum of the amounts of monomers (a1), (a2), (a3), and (a4) is 100% by weight of the monomers, the weight average molecular weight of said water-soluble polymer is at least 500,000 Dalton, and said water-soluble polymer is incompatible with said polymer dispersant. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of producing an aqueous dispersion of a water-soluble polymer, comprising the step of:
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radically polymerizing the following monomers in aqueous solution at a temperature of 0°
-100°
C.;(a1) 50-98.999 wt. % of at least one water-soluble monomer selected from the group consisting of a salt of (meth)acrylic acid of formula IV;
##STR19## (meth)acrylic acid, (meth)acrylamide of formula V;
##STR20## and a monomer of formula VI;
##STR21## where R'"'"' is hydrogen or methyl, O61 is an alkali metal ion, or ammonium ionor O.sup.⊕
is another monovalent positively charged ion;RIII is hydrogen or methyl, RIV and RV, independently, are hydrogen or a C1 -C5 alkyl group or a functionalized C1 -C5 alkyl group; Z1 is O, NH, or NR4, where R4 is as an alkyl group with 1-4 carbon atoms; and L is the group ##STR22## where L1 and L4 are an alkylene group or a hydroxyalkylene group with 2-6 carbon atoms; L2, L3, L5, L6, and L7, independently, are hydrogen or an alkyl group with 1-6 carbon atoms; and Z is a halogen, acetate, or SO4 CH3 ; (a2) 0.01-1 wt. % of at least one crosslinking monomer containing at least 2 ethylenically unsaturated radically polymerizable groups; (a3) 1-25 wt. % of at least one hydrophobic monomer; and (a4) 0-20 wt. % of at least one amphiphilic monomer;
in the presence of at least one polymer dispersant, to form said water-soluble polymer in a dispersion;wherein the sum of the amounts of monomers (a1), (a2), (a3), and (a4) is 100% by weight of the monomers, the weight average molecular weight of said water-soluble polymer is at least 500,000 Dalton, and said water-soluble polymer is incompatible with said polymer dispersant. - View Dependent Claims (9, 10, 11)
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12. A method of producing an aqueous dispersion of a water-soluble polymer, comprising the step of:
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radically polymerizing the following monomers in aqueous solution at a temperature of 0°
-100°
C.;(a1) 50-98.89 wt. % of at least one water-soluble monomer selected from the group consisting of a salt of (meth)acrylic acid of formula IV;
##STR24## (meth)acrylic acid, (meth)acrylamide of formula V;
##STR25## and a monomer of formula VI;
##STR26## where R'"'"' is hydrogen or methyl, O.sup.⊕
is an alkali metal ion, or ammonium ionor O.sup.⊕
is another monovalent positively charged ion;RIII is hydrogen or methyl, RIV and RV, independently, are hydrogen or a C1 -C5 alkyl group or a functionalized C1 -C5 alkyl group; Z1 is O, NH, or NR4, where R4 is as an alkyl group with 1-4 carbon atoms; and L is the group ##STR27## where L1 and L4 are an alkylene group or a hydroxyalkylene group with 2-6 carbon atoms; L2, L3, L5, L6, and L7, independently, are hydrogen or an alkyl group with 1-6 carbon atoms; and Z is a halogen, acetate, or SO4 CH3 ; (a2) 0.01-1 wt. % of at least one crosslinking monomer containing at least 2 ethylenically unsaturated radically polymerizable groups; (a3) 0-25 wt. % of at least one hydrophobic monomer; and (a4) 0.1-15 wt. % of at least one amphiphilic monomer;
in the presence of at least one polymer dispersant, to form said water-soluble polymer in a dispersion;wherein the sum of the amounts of monomers (a1), (a2), (a3), and (a4) is 100% by weight of the monomers, the weight average molecular weight of said water-soluble polymer is at least 500,000 Dalton, and said water-soluble polymer is incompatible with said polymer dispersant. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of producing an aqueous dispersion of a water-soluble polymer, comprising the step of:
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(a) radically polymerizing the following monomers in aqueous solution; (a1) 50-99.999 wt. % of at least one water-soluble monomer; (a2) 0.01-1 wt. % of at least one crosslinking monomer containing at least two ethylenically unsaturated radically polymerizable groups; (a3) 0-30 wt. % of at one hydrophobic monomer; and (a4) 0-20 wt. % of at least one amphiphilic monomer; in the presence of at least one polymer dispersant, to form said water-soluble polymer in a first dispersion; wherein the sum of the amounts of monomers (a1), (a2), (a3), and (a4) is 100% by weight of the monomers, the weight average molecular weight of said water-soluble polymer is at least 500,000 Dalton, and said water-soluble polymer is incompatible with said polymer dispersant, further comprising; (b) adding an aqueous solution of said polymer dispersant to said first dispersion of said water-soluble polymer to form a second diluted dispersion. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification