Water and UV degradable lactic acid polymers
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):
- A; US 5360892
- Application Number:
- PPN: US 8-102703
- OSTI ID:
- 7100739
- Country of Publication:
- United States
- Language:
- English
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Water and UV degradable lactic acid polymers
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Related Subjects
360601 -- Other Materials-- Preparation & Manufacture
553000* -- Agriculture & Food Technology
60 APPLIED LIFE SCIENCES
AGRICULTURE
BIODEGRADATION
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COPOLYMERS
DECOMPOSITION
FILMS
MATERIALS
MATRIX MATERIALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERS
USES
WASTES