公开(公告)号：EP0697865A4

公开(公告)日：1995-09-27

申请号：EP92914551

申请日：1992-06-05

Applicant: ARCH DEV CORP

Inventor： BONSIGNORE PATRICK V ,  COLEMAN ROBERT D

IPC: A01G13/00 ,  A01N25/10 ,  C05G3/00 ,  C08G63/06 ,  C08G63/08 ,  C08G63/664 ,  C08L67/00 ,  C08L67/04 ,  C08L71/02 ,  A61K31/365 ,  C08G63/91 ,  C08L51/00

CPC classification number: C08G63/664 ,  C08G63/06 ,  C08G63/08 ,  C08L67/04 ,  C08L71/00

Abstract: A water and UV light degradable copolymer of monomers of lactic acid and a modifying monomer selected from the class consisting of ethylene and polyethylene glycols, propylene and polypropylene glycols, p-dioxanone, 1,5-dioxepan-2-one, 1,4-oxathialan-2-one, 1,4-dioxide and mixtures thereof. These copolymers are useful for waste disposal and agricultural purposes. Also disclosed is a water degradable blend of polylactic acid or modified polylactic acid and high molecular weight polyethylene oxide wherein the high molecular weight polyethylene oxide is present in the range of from about 2 % by weight to about 50 % by weight, suitable for films. A method of applying an active material selected from the class of seeds, seedlings, pesticides, herbicides, fertilizers and mixtures thereof to an agricultural site is also disclosed.

公开(公告)号：CA2137244A1

公开(公告)日：1993-12-23

申请号：CA2137244

申请日：1992-06-05

Applicant: ARCH DEV CORP

Inventor： BONSIGNORE PATRICK V ,  COLEMAN ROBERT D

IPC: A01G13/00 ,  A01N25/10 ,  C05G3/00 ,  C08G63/06 ,  C08G63/08 ,  C08G63/664 ,  C08L67/00 ,  C08L67/04 ,  C08L71/02 ,  A01C1/06 ,  C08G63/91

Abstract: WATER AND UV DEGRADABLE LACTIC ACID POLYMERS A water and UV light degradable copolymer of monomers of lactic acid and a modifying monomer selected from the class consisting of ethylene and polyethylene glycols, propylene and polypropylene glycols, p-dioxanone, 1,5dioxepan-2-one, 1,4-oxathiolon-2-one, 1-4-dioxide and mixtures thereof. These copolymers are useful for waste disposal and agricultural purposes. Also disclosed is a water degradable blend of polylactic acid or modified polylactic acid and high molecular weight polyethylene oxide wherein the high molecular weight polyethylene oxide is present in the range of from about 2% by weight to about 50% by weight, suitable for films. A method of applying an active material selected from the class of seeds, seedlings, pesticides, herbicides, fertilizers and mixtures thereof to an agricultural site is also disclosed.