公开(公告)号：US20040242732A1

公开(公告)日：2004-12-02

申请号：US10805224

申请日：2004-03-22

Applicant: Plantic Technologies, Ltd.

Inventor： Long Yu ,  Stephen Coombs ,  Gregor Bruce Yeo Christie

IPC: C08L001/00

CPC classification number: C08L3/02 ,  B29K2003/00 ,  B29K2029/04 ,  B29K2995/006 ,  B65D65/466 ,  C08K5/053 ,  C08K5/09 ,  C08L3/06 ,  C08L3/08 ,  C08L3/18 ,  C08L29/04 ,  C08L31/04 ,  C08L2205/02 ,  Y02W90/11 ,  Y02W90/13 ,  Y10T428/1345 ,  C08L2666/02 ,  C08L2666/26

Abstract: A biodegradable polymer is disclosed having the composition g) from 8 to 80% by weight of a starch modified to include an hydroxyalkyl C2-6 group or modified by reaction with an anhydride of a dicarboxylic acid, preferably hydroxypropylated high amylose starch, a) from 0 to 87.9% of starch, b) from 4 to 11% by weight of a water soluble polymer selected from polyvinylacetate, polyvinyl alcohol and copolymers of ethylene and vinylalcohol which have a melting point compatible with the molten stat of the starch components, c) from 0 to 20% by weight of a polyol plasticiser, preferably glycerol, d) from 0.1 to 1.5% by weight of a C12-22 fatty acid or salt, preferably stearic acid and, e) 0 to 12% added water. The polymers are suitable as biodegradable rigid sheet or flexible film materials for use in packaging foodstuffs.

Abstract translation: 公开了一种可生物降解的聚合物，其具有如下组成：g）8至80重量％的经修饰以包括羟烷基C2-6基团的淀粉或通过与二羧酸的酸酐（优选羟丙基化的高直链淀粉）反应进行改性的淀粉，a） 0至87.9％的淀粉，b）4至11重量％的选自聚乙酸乙烯酯，聚乙烯醇和具有与淀粉组分的熔融状态相容的熔点的乙烯和乙烯醇的共聚物的水溶性聚合物，c） 0至20重量％的多元醇增塑剂，优选甘油，d）0.1至1.5重量％的C 12-22脂肪酸或盐，优选硬脂酸，和e）0至12重量％的加入水。 该聚合物适用于生物降解的刚性片或用于包装食品的柔性膜材料。