# US 6,297,303 B1 · Dispersibility improver for fluororesin powders, and organic resin compositions > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 6,297,303 B1 - Document ID: US6297303B1 - Status: Granted - Kind: B1 - Application number: 09/345,542 - Filed: 1999-06-30 - Granted: 2001-10-02 - Earliest claimed: 1998-06-30 - Assignees: Dow Corning Toray Silicone Co., Ltd. - Inventors: Hideki Kobayashi; Toru Masatomi - Web page: https://patentgrep.com/patent/US6297303B1 ## CPC - C08G 77/385: containing halogens - C08G 77/46: containing polyether sequences - C08L 83/08: containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract The invention pertains to a polydiorganosiloxane dispersibility improver for fluororesin powders that contains in the pendant position (A) an organic group selected from the set consisting of polyoxyalkylene-functional organic groups, alkyl groups having at least 12 carbon atoms, and polydialkylsiloxane chain-containing organic groups, and contains in the pendant position or the molecular chain terminal position, (B) a perfluoroalkyl-functional organic group with the general formula F(CF2)a—R1— in which R1 is alkylene or alkyleneoxyalkylene and a is an integer with a value of at least 3. The polydiorganosiloxane dispersibility improver for fluororesin powders has the ability to induce the uniform dispersion of fluororesin powders in organic resins. As a consequence the organic resin compositions have the ability to form uniform and transparent coatings that have an excellent surface lubricity. ## Claims ### Claim 1 A polydiorganosiloxane dispersibility improver having the average formula: wherein R denotes substituted or unsubstituted monovalent hydrocarbon groups; B is the perfluoroalkyl-functional organic group with the general formula F(CF2)a—R1— in which R1 is alkylene or alkyleneoxyalkylene and a is an integer with a value of at least 3; D is an organic group selected from alkyl groups having at least 12 carbon atoms and polydialkylsiloxane chain-containing organic groups; E is a group selected from R, B, and D; x is a number with a value from 0 to 500, y is a number from 1 to 500, z is a number from 1 to 500, and (x+y+z) falls in the range from 2 to 1500. ### Claim 2 (depends on 1) The polydiorganosiloxane dispersibility improver as claimed in claim 1, wherein the organic group is an alkyl group having at least 12 carbon atoms. ### Claim 3 (depends on 1) The polydiorganosiloxane dispersibility improver as claimed in claim 1, wherein the organic group is a polydialkylsiloxane chain-containing organic group. ### Claim 4 (depends on 3) The polydiorganosiloxane dispersibility improver as claimed in claim 3, wherein the polydialkylsiloxane chain-containing organic group has the formula: in which R1 is alkylene or alkyleneoxyalkylene, R is a substituted or unsubstituted monovalent hydrocarbon group, and d is an integer with a value from 1 to 500. ### Claim 5 (depends on 1) The polydiorganosiloxane dispersibility improver as claimed in claim 1, wherein subscript a in the formula of the perfluoroalkyl-functional organic group has a value in the range from 4 to 10. ### Claim 6 An organic resin modifier composition comprising (II) a fluororesin powder and (III) a polydiorganosiloxane dispersibility improver wherein the polydiorganosiloxane contains in the pendant position (A) an organic group selected from the group consisting of polyoxyalkylene-functional organic groups, alkyl groups having at least 12 carbon atoms, and polydialkylsiloxane chain-containing organic groups, and contains in the pendant position or the molecular chain terminal position, (B) a perfluoroalkyl-functional organic group with the general formula F(CF2)a—R1— in which R1 is alkylene or alkyleneoxyalkylene and a is an integer with a value of at least 3. ### Claim 7 (depends on 6) The organic resin modifier composition as claimed in claim 6 wherein the fluororesin polymer is selected from the group consisting of tetrafluoroethylene resin powders, chlorotrifluoroethylene resin powders, tetrafluoroethylene-hexafluoroethylenepropylene resin powders, vinyl fluoride resin powders, vinylidene fluoride resin powders, and dichlorodifluoroethylene resin powders. ### Claim 8 (depends on 6) The organic resin modifier composition as claimed in claim 6 wherein the composition additionally comprises an organic solvent. ### Claim 9 (depends on 6) The organic resin modifier composition as claimed in claim 6 where in the polydiorganosiloxane (III) is present at 0.1 to 30 weight parts per 100 weight parts fluororesin powder (II). ### Claim 10 An organic resin composition comprising (I) an organic resin (II) a fluororesin powder and (III) a polydiorganosiloxane dispersibility improver wherein the polydiorganosiloxane contains in the pendant position (A) an organic group selected from the group consisting of polyoxyalkylene-functional organic groups, alkyl groups having at least 12 carbon atoms, and polydialkylsiloxane chain-containing organic groups, and contains in the pendant position or the molecular chain terminal position, (B) a perfluoroalkyl-functional organic group with the general formula F(CF2)a—R1— in which R1 is alkylene or alkyleneoxyalkylene and a is an integer with a value of at least 3. ### Claim 11 (depends on 10) The organic resin composition as claimed in claim 10 wherein the organic resin is selected from the group consisting of bisphenol A-type polycarbonate resins, bisphenol Z-type polycarbonate resins, silicon-modified polycarbonate resins, acrylic resins, styrene resins, copolymer resins of styrene and a (meth)acrylate ester, polyacetal resins, polyester resins, polyurethane resins, polyarylate resins, polysulfone resins phenolic resins, and nylons. ### Claim 12 (depends on 10) The organic resin composition as claimed in claim 10 wherein (III) is present in an amount from 0.1 to 30 weight parts per 100 weight parts of (II). ### Claim 13 (depends on 10) The organic resin composition as claimed in claim 10 wherein (II) is present in an amount from 0.01 to 60 weight parts per 100 weight parts (I). ### Claim 14 (depends on 10) The organic resin composition as claimed in claim 10 wherein there is additionally present an organic solvent.