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    • 6. 发明申请
    • Biodegradable polymer
    • 生物降解聚合物
    • US20060293419A1
    • 2006-12-28
    • US11505282
    • 2006-08-17
    • Long YuStephen CoombsGregor Christie
    • Long YuStephen CoombsGregor Christie
    • D21H19/54
    • C08L3/02C08K5/0016C08K5/053C08K5/092C08L3/18C08L29/04C08L2201/06C08L2205/02C08L2666/26C08L2666/04C08L2666/02
    • 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 ehtylene and vinylalcohol which have a melting point compatible with the molten state 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.
    • 公开了一种可生物降解的聚合物,其具有以下组成:g)8至80重量%的经修饰以包含羟烷基C 2-6 - 或通过与二羧酸的酸酐反应而修饰的淀粉 羟丙基化高直链淀粉,a)0至87.9%的淀粉,b)4至11重量%的选自聚乙酸乙烯酯,聚乙烯醇和乙烯基醇与乙烯醇的共聚物的水溶性聚合物,其熔点与熔融的 淀粉组分的状态,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%加入的水。 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。