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Title: Water and UV degradable lactic acid polymers

Patent ·
OSTI ID:869589
 [1];  [2]
  1. Joliet, IL
  2. Wheaton, IL
+ Show Author Affiliations

A water and UV light degradable copolymer of monomers of lactic acid and a modifying monomer 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 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:
Argonne National Laboratory (ANL), Argonne, IL (United States)
DOE Contract Number:
W-31109-ENG-38
Assignee:
Arch Development Corporation (Chicago, IL)
Patent Number(s):
US 5360892
OSTI ID:
869589
Country of Publication:
United States
Language:
English

References (9)

Bioabsorbable Fibers of p-Dioxanone Copolymers book July 1990
Biodegradable polymers for use in surgery — poly(glycolic)/poly(Iactic acid) homo and copolymers: 2. In vitro degradation journal April 1981
Biodegradable polymers for use in surgery—polyglycolic/poly(actic acid) homo- and copolymers: 1 journal December 1979
Biodegradable PEO/PLA block copolymers journal November 1988
The role of hydroperoxides in the photo-oxidation of crosslinked polymer coatings journal January 1991
On the kinetics of polymer degradation in solution: Part XI—Radiolysis of poly(olefin sulfones) journal January 1984
Polyesters derived from 1,4-oxathian-2-ones journal March 1985
Compositional and structural analysis of PELA biodegradable block copolymers degrading under in vitro conditions journal September 1989
Rapidly degraded terpolymers of DL-lactide, glycolide, and ?-caprolactone with increased hydrophilicity by copolymerization with polyethers journal October 1990

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Related Subjects

water
degradable
lactic
acid
polymers
light
copolymer
monomers
modifying
monomer
selected
consisting
ethylene
polyethylene
glycols
propylene
polypropylene
p-dioxanone
dioxepan-2-one
-oxathialan-2-one
4-dioxide
mixtures
copolymers
useful
waste
disposal
agricultural
purposes
disclosed
blend
polylactic
modified
molecular
weight
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
polyethylene glycol
lactic acid
active material
molecular weight
material selected
polyethylene oxide
weight poly
monomer selected
polyethylene glycols
modifying monomer
light degradable
acid polymers
degradable copolymer
degradable lactic
/528/424/525/