公开(公告)号：EP1392770A4

公开(公告)日：2004-07-14

申请号：EP02717861

申请日：2002-04-17

申请人： PLANTIC TECHNOLOGIES LTD

发明人： HALLEY PETER ,  MC GLASHAN STEWART ,  GRALTON JOHN

IPC分类号： C08L3/00 ,  C08L3/02 ,  C08L3/04 ,  C08L3/14 ,  C08L3/18 ,  C08L67/06 ,  C08K3/34 ,  C08K9/04 ,  C08L67/00

CPC分类号： C08L3/14 ,  C08L3/00 ,  C08L3/02 ,  C08L3/04 ,  C08L3/18 ,  C08L67/06 ,  C08L2666/02 ,  C08L2666/26

摘要： A biodegradable polymer includes a) 20 to 60% of a mixture of starch and/or a modified starch, b) 8 to 22% of starch plasticisers and processing agents c) 30 to 70% of one or more biodegradable aliphatic polyesters d) 1 to 10% of a layered silicate clay mineral. The silicate mineral is an organoclay which has been formed by reacting clay with an intercalating chemical to compatibilise it with the polymers so that the clay is exfoliated and makes the blend amorphous. The polymers may also include the usual additives including e) from 0 to 20% by weight of a polyol plasticiser f) from 0.1 to 1.5% by weight of a C12-22 fatty acid or salt or a destructing agent preferably urea and/or urea derivatives, and g) from 0 to 12% by weight of added water. The polyester may be modified by reaction with maleic anhydride.