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.
- Research Organization:
- University of Chicago
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- ARCH Development Corp., Chicago, IL (United States)
- Patent Number(s):
- US 5,563,238/A/
- Application Number:
- PAN: 8-328,803
- OSTI ID:
- 379930
- Country of Publication:
- United States
- Language:
- English
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Water and UV degradable lactic acid polymers
Water and UV degradable lactic acid polymers