Biodegradable aliphatic-aromatic polyesters
First Claim
Patent Images
1. Polymeric composition comprisingA) a biodegradable aliphatic/aromatic copolyester (AAPE) comprising:
- a) an acid component comprising repeating units of;
50 to 60% of an aromatic polyfunctional acid;
40 to 50% of an aliphatic acid, at least 90% of which is a long-chain dicarboxylic acid (LCDA) of natural origin selected from azelaic acid, sebacic acid, brassylic acid or mixtures thereof;
b) at least one diol component;
said aliphatic long-chain dicarboxylic acid (LCDA) and said diol component (b) having a number of carbon atoms according to the following formula;
(CLCDA*YLCDA)/2+CB·
YB>
7.5where;
CLCDA is the number of carbon atoms of the LCDA and can be 9, 10 or 13;
YLCDA is the molar fraction of each LCDA on the total number of moles of LCDA;
Cb is the number of carbon atoms of each diol component;
Yb is the molar fraction of each diol on the total number of moles of the diol component (b)said AAPE having;
a biodegradability after 90 days higher than 70%, with respect to pure cellulose according to the Standard ISO 14855 Amendment 1;
a density of equal to or less than 1.2 glee;
a number average molecular weight Mn of 40,000-140,000;
an inherent viscosity of 0.8-1.5; and
B) at least one other polymer selected from other polyesters of the aliphatic/aromatic type or biodegradable polymers of natural origin or of synthetic origin.
0 Assignments
0 Petitions
Accused Products
Abstract
Biodegradable aliphatic/aromatic copolyester comprising 50 to 60 mol % of an aromatic dicarboxylic acid and 40 to 50 mol % of an aliphatic acid, at least 90% of which is a long-chain dicarboxylic acid (LCDA) of natural origin selected from azelaic acid, sebacic acid, brassylic acid or mixtures thereof; and a diol component.
10 Citations
20 Claims
-
1. Polymeric composition comprising
A) a biodegradable aliphatic/aromatic copolyester (AAPE) comprising: -
a) an acid component comprising repeating units of; 50 to 60% of an aromatic polyfunctional acid; 40 to 50% of an aliphatic acid, at least 90% of which is a long-chain dicarboxylic acid (LCDA) of natural origin selected from azelaic acid, sebacic acid, brassylic acid or mixtures thereof; b) at least one diol component; said aliphatic long-chain dicarboxylic acid (LCDA) and said diol component (b) having a number of carbon atoms according to the following formula;
(CLCDA*YLCDA)/2+CB·
YB>
7.5where; CLCDA is the number of carbon atoms of the LCDA and can be 9, 10 or 13; YLCDA is the molar fraction of each LCDA on the total number of moles of LCDA; Cb is the number of carbon atoms of each diol component; Yb is the molar fraction of each diol on the total number of moles of the diol component (b) said AAPE having; a biodegradability after 90 days higher than 70%, with respect to pure cellulose according to the Standard ISO 14855 Amendment 1; a density of equal to or less than 1.2 glee; a number average molecular weight Mn of 40,000-140,000; an inherent viscosity of 0.8-1.5; and B) at least one other polymer selected from other polyesters of the aliphatic/aromatic type or biodegradable polymers of natural origin or of synthetic origin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification