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US 5,371,112 AGranted
Aqueous coating compositions from polyethylene terephthalate
AssigneeThe Sherwin-Williams Company
InventorsDaniel R. Sayre, William B. Lesney, Madhukar Rao, Richard F. Tomko
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Abstract
Coating compositions derived from the acidolysis of polyethylene terephthalate.
Claims17
An aqueous coating composition comprising:
- a. the reaction product of polyethylene terephthalate with a member of the group consisting of acid- and anhydride-functional materials;
- b. followed by the reaction of the product of step "a" with an alcohol;
- wherein the resultant composition has an acid value greater than about 30;
- and wherein subsequent to the reaction of step "b" the resultant composition is neutralized with a weak base and added to water.
1 more element
A coating composition comprising:
- a. the reaction product of polyethylene terephthalate with a member of the group consisting of acid- and anhydride-functional materials;
- b. wherein the composition of step "a" is further reacted with an alcohol to produce a composition having an acid value greater than about 30;
- c. wherein the composition of step "b" is neutralized with a weak base and added to water;
- d. and, wherein acrylic and other ethylenically unsaturated monomers are subsequently polymerized in the presence of the composition of step "c".
1 more element
Dependencies are inferred from the claim text.