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US 8,465,846 B2Granted
Aqueous dispersions and coatings
AssigneeValspar Sourcing, Inc.
InventorsRobert M. O'Brien, Grant Schutte, Jeffrey Niederst, John W. Condit, Dawn S. Herko, Daniel E. Rardon
Life of this patent
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Abstract
The present invention provides aqueous dispersions that, for example, include the reaction product of an oxirane-functional vinyl addition polymer having an oxirane functionality between 0.5 and 5; an acid-functional polymer having an acid number 30 to 500; and a tertiary amine. Also described are coating compositions containing the dispersion and methods of forming the dispersion.
Claims24
An article, comprising:
- a can end or a can body having a metal substrate with a film formed from a composition comprising an aqueous dispersion of a quaternary ammonium salt, wherein the salt comprises the reaction product of an oxirane-functional vinyl addition polymer having an oxirane functionality of 0.5 to 5;
- an acid-functional polymer having an acid number of 30 to 500;
- and a tertiary amine.
An article, comprising:
- a can end or a can body having a metal substrate with a film formed from an aqueous dispersion comprising a reaction product of:
- an oxirane-functional vinyl addition polymer having an oxirane functionality of 0.5 to 5 and a number average molecular weight of 2,500 to 20,000;
- an acid-functional polymer having an acid number of 30 to 500 and a number average molecular weight of 2,000 to 15,000, wherein the acid-functional polymer is a vinyl polymer formed as the reaction product of at least 15% by weight of acid-functional monomer;
- and
- a tertiary amine;
- wherein the weight ratio of the oxirane-functional vinyl addition polymer to acid-functional polymer is 90:10 to 50:50 and the ratio of amine:oxirane groups is 0.8:1 to 5:1;
- and
- wherein the oxirane-functional vinyl addition polymer having an oxirane functionality of 0.5 to 5 and the acid-functional polymer having an acid number of 30 to 500 were reacted together in the presence of the tertiary amine.
5 more elements
Dependencies are inferred from the claim text.