Biodegradable coatings of ionomer polymer
AssigneeExxon Research & Engineering Co.
InventorsWarren A. Thaler, Pacifico V. Manalastas, Evelyn N. Drake, Robert D. Lundberg
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Abstract
A polymeric composite comprising a (a) urea; (b) a coating of sulfonated polymer which has about 10 to about 200 meq. of sulfonate groups per 100 grams of said sulfonated polymer, said sulfonate groups being neutralized with a polycaprolactone polymer having the formula: ##STR1## wherein R.sub.1 or R.sub.2 is an alkyl, cycloalkyl or aryl group; R.sub.3, R.sub.4 and R.sub.5 are a hydrogen or alkyl, cycloalkyl, or aryl groups; m equals 1 to 20 and n equals 1 to 500, wherein said coating is deposited on the surface of said urea.
Claims10
A biodegradable polymeric composite comprising a (a) urea;
- (b) a coating of about 2 to about 100 microns of a sulfonated polymer on the surface of said urea, said sulfonated polymer having about 10 to about 200 meq. of sulfonate groups per 100 grams of said sulfonated polymer, said sulfonate groups being neutralized with a polycaprolactone polymer having the formula:
- ##STR4## wherein R.sub.1 or R.sub.2 is an alkyl, cycloalkyl or aryl group;
- R.sub.3, R.sub.4 and R.sub.5 are a hydrogen or alkyl, cycloalkyl, or aryl groups;
- m equals 1 to 20 and n equals 1 to 500.
A polymeric composite comprising a (a) urea;
- (b) a coating of a neutralized, sulfonated polymer which has about 10 to about 200 meq. of sulfonate groups per 100 grams of said sulfonated polymer, said sulfonate groups being neutralized with a metal ion which is capable of coordinating with the amino group of a polycaprolactone polymer having the formula:
- ##STR5## wherein R.sub.1 or R.sub.2 is an alkyl, cycloalkyl or aryl group;
- R.sub.3, R.sub.4 and R.sub.5 are a hydrogen or alkyl, cycloalkyl, or aryl groups;
- m equals 1 to 20 and n equals 1 to 500, wherein said coating is deposited on the surface of said urea.
Dependencies are inferred from the claim text.