Water and UV degradable lactic acid polymers

Patent · Tue Nov 01 00:00:00 EST 1994

OSTI ID:7100739

Bonsignore, P V; Coleman, R D

A water and UV light degradable copolymer of monomers of lactic acid and a modifying monomer were 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. 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 where 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 to an agricultural site is also disclosed.

• DOE Contract Number: W-31109-ENG-38
• Assignee: Arch Development Corp., Chicago, IL (United States)
• Patent Number(s): US 5360892; A
• Application Number: PPN: US 8-102703
• OSTI ID: 7100739
• Resource Relation: Patent File Date: 5 Aug 1993
• Country of Publication: United States
• Language: English

Related Subjects

60 APPLIED LIFE SCIENCES
36 MATERIALS SCIENCE
AGRICULTURE
MATRIX MATERIALS
COPOLYMERS
USES
WASTES
BIODEGRADATION
CHEMICAL COMPOSITION
FILMS
CHEMICAL REACTIONS
DECOMPOSITION
MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
553000* - Agriculture & Food Technology
360601 - Other Materials- Preparation & Manufacture