초록 ▼

The present invention provides a screen printable hydrogel composition comprising: (a) soluble or partially soluble polymer wherein said polymer is a copolymer, interpolymer or mixture thereof; (b) initiation system; (c) thickener; (d) water; and (e) solvent; with the proviso that the composition ha

The present invention provides a screen printable hydrogel composition comprising: (a) soluble or partially soluble polymer wherein said polymer is a copolymer, interpolymer or mixture thereof; (b) initiation system; (c) thickener; (d) water; and (e) solvent; with the proviso that the composition has a viscosity of greater than about 10 Pa쨌s.

대표청구항 ▼

What is claimed is: 1. A screen printable hydrogel composition comprising: (a) A soluble or partially soluble polymer wherein said polymer is a photocrosslinkable polymer which is a copolymer, interpolymer or mixture thereof, wherein each copolymer or interpolymer comprises (1) a nonacidic comonome

What is claimed is: 1. A screen printable hydrogel composition comprising: (a) A soluble or partially soluble polymer wherein said polymer is a photocrosslinkable polymer which is a copolymer, interpolymer or mixture thereof, wherein each copolymer or interpolymer comprises (1) a nonacidic comonomer comprising a C1-10 alkyl acrylate, C1-10 alkyl methacrylate, styrenes or combinations thereof; (2) an acidic comonomer and its salts comprising ethylenically unsaturated carboxylic acid containing moiety, wherein 2-25% of the carboxylic acid containing moiety is reacted with a reactive molecule having a first and second functional unit wherein the first functional unit is a vinyl group and the second functional unit is capable of forming a chemical bond by reaction with the carboxylic acid moiety; (3) third comonomer units formed from the reacted portion of acidic comonomers; and (4) a nonacidic comonomer comprising C1-10 alkyl or alkoxy methacrylate or acrylate; (b) initiation system; (c) thickener; (d) water; and (e) solvent; with the proviso that the composition has a viscosity of greater than about 10 Pa쨌s and wherein said composition is a screen printable hydrogel composition. 2. The composition of claim 1 wherein the vinyl group is selected from the group consisting of a methacrylate, acrylate group and mixtures thereof. 3. The composition of claim 1 wherein the second functional unit is selected from the group consisting of an epoxide, alcohol, amine and mixtures thereof. 4. The composition of claims 1-3 further comprising a monomer. 5. The composition of claim 4 wherein said monomer is selected from the group consisting of polyoxyethylated trimethylolpropane triacrylate, ethylated pentaerytbritol triacrylate, dipentaerythritol monohydroxypentaacrylate, 1,10-decanediol dimethlacrylate and mixtures thereof. 6. The composition of any claim 1 in which the solvent is selected from the group consisting of carbitol acetate, ethanol, methyl ethyl ketone, acetone, and mixtures thereof. 7. The composition of claim 1 wherein the thickener is selected from the group consisting of polyvinyl pyrrolidone, fumed silica, polyethylene oxide, carboyximethyl cellulose, polyvinyl pyrrolidone/vinyl acetate copolymer, and mixtures thereof. 8. The composition of claim 1 further comprising an additive selected from the group consisting of humectants, surfactants, biocides, preservatives and combinations thereof. 9. The composition of claim 1 further comprising an ionic component. 10. The composition of claim 1 which is in the form of a paste suitable for screen printing.