# US 5,349,037 A · Adhesive composition > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,349,037 A - Document ID: US5349037A - Status: Granted - Kind: A - Application number: 08/025,862 - Filed: 1993-03-03 - Granted: 1994-09-20 - Earliest claimed: 1992-03-03 - Assignees: Shin-Etsu Chemical Co., Ltd. - Inventors: Hironao Fujiki; Kaoru Michimata; Takehide Okami - Web page: https://patentgrep.com/patent/US5349037A ## CPC - C09J 183/08: containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen - C08L 83/00: Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) ## Abstract An adhesion composition comprising: (A) a high molecular weight fluorosilicone polymer containing the unit having the formula (1): RfCH.sub.2 CH.sub.2 (CH.sub.3)SiO-- (1) wherein Rf is a perfluoroalkyl group containing 1 to 8 carbon atoms, in an amount of 30 mol % or more in the molecule, and blocked with the vinyl group at the both ends, (B) a low molecular fluorosilicone polymer containing the unit having the formula (1) in an amount of 30 mol % or more in the molecule, and containing an average of 3 or more units having the following formula (2): CH.sub.2 .dbd.CH(CH.sub.3)SiO-- (2), (C) an organohydrogenpolysiloxane, (D) an organosilane or organopolysiloxane having at least one hydrogen atom or alkenyl group bonded to a silicon atom and having at least one of the oxirane group, dialkoxysilyl groups or trialkoxysilyl groups, and (E) a platinum catalyst. The cured product of the composition has good resistance to gasoline, and therefore useful for automobile parts. ## Claims ### Claim 1 An adhesion composition comprising: (A) a fluorosilicone polymer containing the unit having the following formula (1): RfCH.sub.2 CH.sub.2 (CH.sub.3)SiO-- (1) wherein Rf is a perfluoroalkyl group containing 1 to 8 carbon atoms, in an amount of 30 mol % or more on average in the molecule, blocked with the vinyl group at both ends of the molecular chain, and having a viscosity at 25.degree. C. of 1,000 to 100,000 cSt, (B) a fluorosilicone polymer containing the unit having the formula (1) in an amount of 30 mol % or more on average in the molecule, containing an average of 3 or more units having the following formula (2): CH.sub.2 .dbd.CH(CH.sub.3)SiO-- (2), having an average polymerization degree of 10 or more, the average polymerization degree being defined as the number of SiO units contained in the molecule, and having a viscosity at 25.degree. C. of 10 cSt or more but less than 1,000 cSt, (C) an organohydrogenpolysiloxane other than (D) having an average of 2 or more of silicon-bonded hydrogen atoms, (D) an organosilane or organopolysiloxane having at least one hydrogen atom or alkenyl group bonded to a silicon atom and having at least one group selected from the group consisting of the oxirane group, dialkoxysilyl groups and trialkoxysilyl groups in the molecule, and (E) platinum or a platinum compound. ### Claim 2 (depends on 1) The composition according to claim 1, wherein the fluorosilicone polymer of the component (A) comprises at least one compound selected from the group consisting of the compounds represented by the formulas (3) to (6): ##STR12## wherein in the formulas above n and m denote(s) an integer of 1 or more. ### Claim 3 (depends on 1) The composition according to claim 1, wherein the fluorosilicone polymer of the component (B) is present in an amount of 1 to 30 parts by weight per 100 parts by weight of the fluorosilicone polymer of the component (A). ### Claim 4 (depends on 1) The composition according to claim 1, wherein the fluorosilicone polymer of the component (B) comprises at least one compound selected from the group consisting of the compounds represented by the formulas (8) to (10): ##STR13## wherein in the formulas above n and m are an integer of 1 or more, and 1 is an integer of 3 or more. ### Claim 5 (depends on 1) The composition according to claim 1, wherein the component (C) is present in an amount of 0.5 parts by weight per 100 parts by weight of the component (A). ### Claim 6 (depends on 1) The composition according to claim 1, wherein the component (D) is present in an amount of 0.1 to 30 parts by weight per 100 parts by weight of the component (A). ### Claim 7 (depends on 1) The composition according to claim 1, wherein the components (C) and (D) are present in such amounts that the total of the Si--H groups contained in the components (C) and (D) is 0.5 to 4.0 mol per mol of the entire alkenyl groups contained in the composition. ### Claim 8 (depends on 1) The composition according to claim 1, wherein the component (D) comprises at least one compound selected from the group consisting of the compounds represented by the formulas (21) to (33): ##STR14## wherein a, b and c are each an integer of 1 or more. ### Claim 9 (depends on 1) A cured product obtained by curing the composition as claimed in claim 1.