Patent ID: 8859690

Claim:
A biodegradable composite prepared using a first feedstock comprising a polylactic acid, an aliphatic-aromatic copolyester A, an aliphatic-aromatic copolyester B, and an organic peroxide at a temperature between about 100° C. and about 200° C., wherein, based on the total weight of said first feedstock, a content of the polylactic acid is about 45% to about 90% by weight, wherein said aliphatic-aromatic copolyester A is formed by using an esterification feedstock comprising: (a) C 8 -C 20 aromatic dibasic acids and C 2 -C 20 aliphatic dibasic acids, (b) C 2 -C 20 aliphatic dibasic alcohols and/or C 3 -C 10 alicyclic dibasic alcohols, (c) at least one selected from the group consisting of polyhydric alcohols with functionality of greater than about 2, polybasic carboxylic acids with functionality of greater than about 2, and anhydrides of polybasic carboxylic acids with functionality of greater than about 2, wherein said aliphatic-aromatic copolyester B is a random copolymer comprising structure unit (I) and structure unit (II), wherein the molar ratio of structure unit (I) to structure unit (II) is about 1 to about 0.1-10, wherein m is an integer of from 2 to 10, wherein n is an integer of from 2 to 8, and wherein p is an integer of from 2 to 10, and wherein the weight-average molecular weight of said aliphatic-aromatic copolyester B is about 100000 to about 600000, wherein a weight ratio between said aliphatic-aromatic copolyester A and said aliphatic-aromatic copolyester B is about 4:6 to about 8:2.