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Title: Water and UV degradable lactic acid polymers

A water and UV light degradable copolymer is described made from 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:
;
Issue Date:
OSTI Identifier:
379930
Assignee:
ARCH Development Corp., Chicago, IL (United States) PTO; SCA: 400201; 540220; PA: EDB-96:151182; SN: 96001674306
Patent Number(s):
US 5,563,238/A/
Application Number:
PAN: 8-328,803
Contract Number:
W-31109-ENG-38
Resource Relation:
Other Information: PBD: 8 Oct 1996
Research Org:
Univ. of Chicago, IL (United States)
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 54 ENVIRONMENTAL SCIENCES; COPOLYMERS; CHEMICAL COMPOSITION; BIODEGRADATION; USES; MATRIX MATERIALS; BIOMASS PLANTATIONS; SANITARY LANDFILLS; HYDROXY ACIDS; GLYCOLS; HYDROLYSIS; ULTRAVIOLET RADIATION; PHOTOLYSIS

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