# US 5,708,116 A · Low dielectric constant allylics > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,708,116 A - Document ID: US5708116A - Status: Granted - Kind: A - Application number: 08/455,606 - Filed: 1995-05-31 - Granted: 1998-01-13 - Earliest claimed: 1995-05-31 - Assignees: The United States of America as represented by the Secretary of the Navy - Inventors: James R. Griffith; Henry S. W. Hu - Web page: https://patentgrep.com/patent/US5708116A ## CPC - C08G 77/52: containing aromatic rings - C08G 77/385: containing halogens - H05K 1/034: {containing halogen} - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A reaction product of a liquid monomeric allyletherfluoroalkylene benzene d a liquid polymethylhydrosiloxane, which reaction product in a cured, solid state has dielectric constant below about 2.5. ## Claims ### Claim 1 A network polymer containing the following connecting units: ##STR12## where the terminal carbon atom of each connecting unit is bonded to the same benzene ring at positions #1 and #3, wherein position #5 on the benzene ring is substituted with a connecting unit as defined above or a group selected from the group consisting of R.sup.2 --O--R.sup.3 -- and R.sup.4 -- where R.sup.2 is selected from optionally fluorinated hydrocarbon groups of 1-18 carbon atoms and R.sup.3 is selected from the group consisting of straight and branched chain fluorinated alkylene radicals of 1-6 carbon atoms containing 2-12 fluorine atoms and R.sup.4 is selected from fluorinated hydrocarbon groups of 1-18 carbon atoms. ### Claim 2 (depends on 1) The polymer of claim 1 having viscosity from about 100 centistokes at 25.degree. C. to a solid state. ### Claim 3 (depends on 1) The polymer of claim 1 where R.sup.2 and R.sup.4 are individually selected from the group consisting of fluorinated hydrocarbons of 2-6 carbon atoms. ### Claim 4 (depends on 1) The poller of claim 1 where R.sup.4 is selected from the group consisting of CF.sub.3 and C.sub.2 F.sub.5 groups. ### Claim 5 (depends on 4) The poller of claim 4 in solid form having dielectric constant below about 2.5. ### Claim 6 A reaction product of reactant X and reactant Y in presence of a catalyst, wherein reactant X is an allyletherfluoroalkylene benzene and reactant Y is a polyalkylhydrosiloxane; said allyletherfluoroalkylene benzene is selected from reactants having the following structure: ##STR13## where at least two of the R.sup.5, R.sup.6 and R.sup.7 groups have the following structure: CH.sub.2 .dbd.CH--CH.sub.2 --O--R.sup.8 -- where R.sup.8 is selected from the group consisting of straight and branched chain fluorinated alkylene groups of 1-6 carbon atoms containing 2-12 fluorine atoms, when two of the three groups are the structures noted earlier, the third group is selected from the group consisting of the following structures: R.sup.2 --O--R.sup.3 -- and R.sup.4 -- where R.sup.2 is selected from optionally fluorinated hydrocarbon groups of 1-18 carbon atoms, R.sup.3 is selected from the group consisting of straight and branched chain fluorinated alkylene radicals of 1-6 carbon atoms containing 2-12 fluorine atoms, and R.sup.4 is selected from fluorinated hydrocarbon groups of 1-18 carbon atoms; and the polyalkylhydrosiloxane contains the following repeating unit: ##STR14## where R.sup.12 is selected from the group consisting of lower alkyl groups containing 1-6 carbon atoms. ### Claim 7 (depends on 6) A reaction product of claim 6 wherein R.sup.12 is selected from the group consisting of methyl and ethyl groups. ### Claim 8 (depends on 7) The reaction product of claim 7 where at least two of the R.sup.5, R.sup.6 and R.sup.7 groups are ##STR15## ### Claim 9 (depends on 8) The reaction product of claim 8 where R.sup.2 and R.sup.4 are selected from the group consisting of fluorinated hydrocarbon radicals of 2-6 carbon atoms. ### Claim 10 (depends on 6) The reaction product of claim 6 where R.sup.2 is ##STR16## and R.sup.4 is selected from the group consisting of CF.sub.3 and C.sub.2 F.sub.5 groups, the reaction product is in solid form with a dielectric constant below about 2.5. ### Claim 11 A reaction product of reactant X and reactant Y in presence of a catalyst, where reactant X is has the following structure: ##STR17## where two of the R.sup.5, R.sup.6 and R.sup.7 groups have the following structure: ##STR18## and the third is selected from the group consisting of the following structures: R.sup.2 --O--R.sup.3 -- and R.sup.4 -- where R.sup.2 is selected from the group consisting of fluorinated hydrocarbon groups of 2-6 carbon atoms, R.sup.3 is a straight or branched chain fluorinated alkylene group containing 1-6 carbon atoms and 2-12 fluorine atoms, R.sup.4 is selected from fluorinated hydrocarbon groups of 1-18 carbon atoms, and reactant Y is a polymethylhydrosiloxane. ### Claim 12 (depends on 11) The reaction product of claim 11 in solid form having dielectric constant below about 2.5, where R.sup.2 is ##STR19## and R.sup.4 is selected from the group consisting of CF.sub.3 and C.sub.2 F.sub.5 groups. ### Claim 13 A reaction product of reactant X and reactant Y prepared in presence of a catalyst containing a metal selected from the group consisting of platinum, palladium, and rhodium, where reactant X is ##STR20## and where reactant Y is ##STR21## wherein n is a value such that the reactant Y is a liquid at room temperature where said reaction product has dielectric constant below about 2.5.