Crosslinkable composition
AssigneeRohm and Haas Company
InventorWard Thomas Brown
Life of this patent
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Abstract
A crosslinkable composition is provided including copolymer particles having phosphorus acid groups dispersed in an aqueous medium, and polycarbodiimide, wherein the crosslinkable composition is substantially free of water soluble phosphorus acid compounds. Also provided is a process for forming the crosslinkable composition and a method for crosslinking the crosslinkable composition. The crosslinkable composition is useful as a coating composition to prepare coatings for various substrates including metal, wood, glass, paper, and leather.
Claims10
A crosslinkable composition comprising:
- a) copolymer particles having first phosphorus acid groups;
- b) polycarbodiimide;
- c) an aqueous medium;
- and
- d) at least one water soluble phosphorus acid compound having at least one second phosphorus acid group;
- wherein the ratio of equivalents of said second phosphorus acid groups to equivalents of said first phosphorus acid groups is in the range of 0 to 2.
A method for providing an article comprising a crosslinked polymer, comprising the steps of:
- a) forming a crosslinkable composition comprising:
- i) copolymer particles having first phosphorus acid groups;
- ii) polycarbodiimide;
- iii) an aqueous medium;
- and
- iii) at least one water soluble phosphorus acid compound having at least one second phosphorus acid group, wherein the ratio of equivalents of said second phosphorus acid groups to equivalents of said first phosphorus acid groups is in the range of 0 to 2;
- b) applying said crosslinkable composition to a substrate;
- and
- c) curing or allowing to cure said crosslinkable composition.
A process for forming a crosslinkable composition comprising the steps of:
- a) polymerizing at least one phosphorus acid monomer and at least one comonomer in an aqueous reaction medium to form copolymer particles having first phosphorus acid groups;
- and
- b) admixing polycarbodiimide with said copolymer particles;
- wherein said crosslinkable composition comprises, at least one water soluble phosphorus acid compound having at least one second phosphorus acid group;
- and wherein the ratio of equivalents of said second phosphorus acid groups to equivalents of said first phosphorus acid groups is in the range of 0 to 2.
Dependencies are inferred from the claim text.