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Title: 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 glycol, propylene glycol, 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.
Inventors:
 [1];  [2]
  1. (Joliet, IL)
  2. (Wheaton, IL)
Issue Date:
OSTI Identifier:
870630
Assignee:
ARCH Development Corporation (Chicago, IL) ANL
Patent Number(s):
US 5563238
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
water; degradable; lactic; acid; polymers; light; copolymer; monomers; modifying; monomer; selected; consisting; ethylene; glycol; propylene; p-dioxanone; dioxepan-2-one; 4-oxathialan-2-one; 4-dioxide; mixtures; copolymers; useful; waste; disposal; agricultural; purposes; disclosed; blend; polylactic; modified; molecular; weight; polyethylene; oxide; range; 50; suitable; films; method; applying; active; material; seeds; seedlings; pesticides; herbicides; fertilizers; site; acid polymer; propylene glycol; polylactic acid; ethylene glycol; waste disposal; lactic acid; active material; molecular weight; material selected; polyethylene oxide; weight poly; monomer selected; modifying monomer; light degradable; acid polymers; degradable copolymer; degradable lactic; /528/424/428/525/

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