초록 ▼

A polymer comprising i) a synthetic polymeric component that has been formed from an ethylenically unsaturated water-soluble or potentially water-soluble monomer and an ethylenically unsaturated monomer carrying a reactive group, wherein the reactive group is directly reactive with a cellulose bindi

A polymer comprising i) a synthetic polymeric component that has been formed from an ethylenically unsaturated water-soluble or potentially water-soluble monomer and an ethylenically unsaturated monomer carrying a reactive group, wherein the reactive group is directly reactive with a cellulose binding domain protein; and ii) a protein component consisting of a cellulose binding domain protein, wherein the cellulose binding domain protein. The polymer is particularly suitable as a dry strength resin in a paper making process. It can also be used as a wet strength resin, internal sizing agent or surface sizing agent.

대표청구항 ▼

The invention claimed is: 1. A method of improving the strength of paper produced in a paper making process which process comprises providing a cellulosic suspension comprising cellulosic fibres and optionally fillers, including a dry strength resin, and then dewatering the cellulosic suspension on

The invention claimed is: 1. A method of improving the strength of paper produced in a paper making process which process comprises providing a cellulosic suspension comprising cellulosic fibres and optionally fillers, including a dry strength resin, and then dewatering the cellulosic suspension on a wire or mesh to form a sheet and drying the sheet, in which the dry strength resin is a polymer comprising i) a synthetic polymeric component that has been formed from an ethylenically unsaturated water-soluble or potentially water-soluble monomer and an ethylenically unsaturated monomer carrying a reactive group, wherein the reactive group is directly reactive with a cellulose binding domain protein; and ii) a protein component comprising a cellulose binding domain protein, wherein the cellulose binding domain protein is covalently bonded to the synthetic polymer component through one or more of the reactive groups. 2. A method according to claim 1 in which the reactive group is selected from the group consisting of epoxides, isocyanates and amido methylol groups. 3. A method of improving the wet strength of paper produced in a paper making process which process comprises providing a cellulosic suspension comprising cellulosic fibres and optionally fillers, including a wet strength resin, and then dewatering the cellulosic suspension on a wire or mesh to form a sheet and drying the sheet, in which the wet strength resin is a polymer comprising i) a synthetic polymeric component that has been formed from an ethylenically unsaturated water-soluble or potentially water-soluble monomer and an ethylenically unsaturated monomer carrying a reactive group, wherein the reactive group is directly reactive with a cellulose binding domain protein; and ii) a protein component comprising a cellulose binding domain protein, wherein the cellulose binding domain protein is covalently bonded to the synthetic polymer component through one or more of the reactive groups. 4. A method according to claim 3 in which the reactive group is selected from the group consisting of epoxides, isocyanates and amido methylol groups. 5. A method of internally sizing paper produced in a paper making process which process comprises providing a cellulosic suspension comprising cellulosic fibres and optionally fillers, including internal sizing agent, and then dewatering the cellulosic suspension on a wire or mesh to form a sheet and drying the sheet, in which the internal sizing agent is a polymer comprising i) a synthetic polymeric component that has been formed from an ethylenically unsaturated water-soluble or potentially water-soluble monomer and an ethylenically unsaturated monomer carrying a reactive group, wherein the reactive group is directly reactive with a cellulose binding domain protein; and ii) a protein component comprising a cellulose binding domain protein, wherein the cellulose binding domain protein is covalently bonded to the synthetic polymer component through one or more of the reactive groups. 6. A method according to claim 5 in which the reactive group is selected from the group consisting of epoxides, isocyanates and amido methylol groups. 7. A method of surface sizing paper which method comprises applying a surface sizing agent to the surface of a formed cellulosic sheet, in which the surface sizing agent is a polymer comprising: i) a synthetic polymeric component that has been formed from an ethylenically unsaturated water-soluble or potentially water-soluble monomer and an ethylenically unsaturated monomer carrying a reactive group, wherein the reactive group is directly reactive with a cellulose binding domain protein; and ii) a protein component comprising a cellulose binding domain protein, wherein the cellulose binding domain protein is covalently bonded to the synthetic polymer component through one or more of the reactive groups. 8. A method according to claim 7 in which the reactive group is selected from the group consisting of epoxides, isocyanates and amido methylol groups.