Siloxane graft co-polymers for mold release
Assignee3M Innovative Properties Company
InventorsChetan P. Jariwalla, Suresh Iyer, Thomas P. Hanschen
Life of this patent
Estimating the term…
Abstract
A graft co-polymer is provided comprising a vinyl polymeric backbone with grafts of siloxane monomers and monomers containing an anchoring group. Such co-polymers are well suited for coating metal molds. The siloxane groups provide release to the metal mold, while the anchoring groups provide durability to the coating. The durability and release characteristics may be varied by the number of grafts of each monomer and the molecular weight of the siloxane moiety. The co-polymers may be coated from water or organic solvents.
Claims20
A composition comprising the reaction product of (A) an ethylenically unsaturated siloxane monomer and (B) hydroxyethylmethacrylate phosphate, wherein the hydroxyethylmethacrylate phosphate is present at a concentration of 5%-8% of the total polymer weight.
An aqueous composition comprising the reaction product of an ethylenically unsaturated siloxane monomer and hydroxyethylmethacrylate phosphate, wherein the hydroxyethylmethacrylate phosphate has been neutralized with a volatile base, and wherein the hydroxyethylmethacrylate phosphate is present at a concentration of 5%-8% of the total polymer weight.
A method of making a composition comprising:
- reacting an ethylenically unsaturated siloxane monomer and hydroxyethylmethacrylate phosphate in a reaction solvent to form a co-polymer, wherein the hydroxyethylmethacrylate phosphate is present at a concentration of 5%-8% of the total polymer weight.
A method of coating a mold comprising:
- reacting an ethylenically unsaturated siloxane monomer and hydroxyethylmethacrylate phosphate in a reaction solvent to form a co-polymer, wherein the hydroxyethylmethacrylate phosphate is present at a concentration of 5%-8% of the total polymer weight;
- coating a mold with the co-polymer;
- and
- curing the coated co-polymer.
Dependencies are inferred from the claim text.