摘要:
A curative composition comprising a cation and an anion of the formula Anq−Qpm+, wherein m, n, p, and q are positive integers, wherein m*p=n*q, wherein Qm+ is an organo onium, and Aq− is an anion, provided that at least one Aq− is selected from the formula: wherein each R independently is H, halo, alkyl, aryl, aralkyl, or cycloalkyl, and which also may be halogenated, fluorinated, or perfluorinated, wherein two or more of R and R′ groups may together form a ring, wherein each R group independently may contain one or more heteroatom(s), wherein R′ can be the same as R, with the proviso that R′ cannot be halo. Also provided are a fluoropolymer composition including this curative, a method of making a fluoropolymer, and fluoropolymer articles containing curable or cured fluoropolymer compositions.
摘要翻译:包含阳离子和式A的阴离子的固化剂组合物,其中m ,n,p和q是正整数,其中m * p = n * q,其中Q m +是有机鎓,A q - 是阴离子, 条件是从下式中选择至少一个A q - :其中每个R独立地是H,卤素,烷基,芳基,芳烷基或环烷基,并且也可以是卤化的,氟化的或全氟化的 其中R和R'基团中的两个或多个可以一起形成环,其中每个R基团可独立地含有一个或多个杂原子,其中R'可以与R相同,条件是R'不能为 光环。 还提供了包含该固化剂的含氟聚合物组合物,制备含氟聚合物的方法和含有可固化或固化的含氟聚合物组合物的含氟聚合物制品。
摘要:
To provide a fluorine-containing copolymer having functional group which contains a hydrocarbon vinyl ether unit having functional group and a tetrafluoroethylene unit, has a fluorine content of not less than 10% by weight, is insoluble in tetrahydrofuran substantially, is excellent in adhesion to a substrate and makes it possible to carry out crosslinking easily.
摘要:
A fluorine-containing polyquinazolone polymer having a bisquinazolone unit represented by Formula 1 as the repeating unit is used for a gas separation membrane so that great chemical and heat resistance is provided. The membrane also has great permeability and effective separability, as well as excellent mechanical strength. ##STR1## where R.sub.1 indicates a tetravalent organic group, R.sub.2 respectively indicate an alkyl group or an aromatic group, R.sub.3 indicates a divalent organic group, and R.sub.1 and/or R.sub.3 indicates an organic group having at least one fluorine atom.
摘要:
The present invention is a cyanate resin monomer having the formula: NCO--CH.sub.2 --(CF.sub.2).sub.n --CH.sub.2 --OCN where n is an even integer from 6 to 10, inclusive. Another aspect of the invention is an essentially pure cyanate resin mono having the formula: NCO--CH.sub.2 --(CF.sub.2).sub.n --CH.sub.2 --OCN where n=3, 4, 6, 8, or 10. Another aspect of the invention is a prepolymer made by the process of heating a monomer of the invention to a conversion below the gel point. Another aspect of the invention is a method for depositing an interlevel dielectric resin on an integrated circuit, having the steps: (a) coating the integrated circuit with a thin film of a prepolymer made by the process of heating a monomer of the invention to below the gel point, and (b) curing the prepolymer to at least the gel point. Another aspect of the invention is a low dielectric thermoset polymer resin made from these monomers. Another aspect of the invention is a composite of a resin of the invention combined with another material or materials, for structural and/or electronic applications. Such materials include powders and fibers made from, e.g., fused silica or quartz. Another aspect of the invention is making and purifying the monomers of the invention.
摘要:
Alcohol-soluble, aromatic heterocyclic copolymers having repeating units of the formula: ##STR1## wherein x has a value of 0.10 to 0.90 and y has a value of 1.0-x. These copolymers are useful in the preparation of organic/inorganic hybrid materials having transparency which comprise the sol-gel derived, hydrolytically condensed reaction product of a metal alkoxide of the formula M(OR).sub.w wherein R is a lower alkyl group, M is Si, Ti, Al or a mixture thereof, and w is the valence value of M, and the above copolymer.
摘要:
Compositions of matter including the structural unit ##EQU1## wherein R.sub. F ' is a divalent polyfluoroalkylene group having a chain length of from 1 to 4 carbon atoms which may be substituted at one or more positions with chloro-or polyfluoroalkyl, chlorofluoroalkyl or polyfluorocycloalkyl groups containing up to six carbon atoms; and R.sub.F is a monovalent straight or branched chain, or cyclic, polyfluoroalkyl group or a chlorofluoroalkyl group containing up to ten carbon atoms and the R.sub.F groups are the same or different or is a divalent polyfluoroalkylene group having a chain length of from 1 to 4 carbon atoms which may be substituted at one or more positions with chloro or polyfluoroalkyl, chlorofluoroalkyl or polyfluorocycloalkyl groups containing up to six carbon atoms and the R.sub.F groups are interconnected to form a cyclic structure.
摘要:
A PROCESS FOR CROSS-LINKING A POLYFLUOROPOLYMER CONTAINING PENDANT PERFLUOROVINYL GROUPS INCLUDING THE STEP OF TREATING THE POLYFLUOROPOLYMER WITH AN EFFECTIVE AMOUNT OF A CROSS-LINKING AGENT INCLUDING THE STRUCTURAL UNIT:
-N(-RF)-R''F-N(-RF)-O-O-
WHEREIN R''F IS A DIVALENT POLYFLUOROALKYLENE GROUP HAVING A CHAIN LENGTH OF FROM 1 TO 4 CARBON ATOMS WHICH MAY BE SUBSTITUTED AT ONE OR MORE POSITIONS WITH CHLORO- OR POLYFLUOROALKYL, CHLOROFLUOROALKYL OR POLYFLUOROCYCLOALKYL GROUPS CONTAINING UP TO SIX CARBON ATOMS, AND RF IS A MONOVALENT STRAIGHT OR BRANCHED CHAIN, OR CYCLIC, POLYFLUOROALKYL GROUP OR A CHLOROFLUOROALKYL GROUP CONTAINING UP TO TEN CARBON ATOMS AND THE RF GROUPS ARE THE SAME OR DIFFERENT OR IS A DIVALENT POLYFLUOROALKYLENE GROUP HAVING A CHAIN LENGTH OF FROM 1 TO 4 CARBON ATOMS WHICH MAY BE SUBSTITUTED AT ONE OR MORE POSITIONS WITH CHLORO- OR POLYFLUOROALKYL, CHLOROFLUOROALKYL OR POLYFLUOROCYCLOALKYL GROUPS CONTAINING UP TO SIX CARBON ATOMS AND THE RF GROUPS ARE INTERCONNECTED TO FORM A CYCLIC STRUCTURE.
摘要:
A DECREASE IN PERMEABILITY AND AN INCREASE IN CHEMICAL RESISTANCE OF CARBOXYNITROSO RUBBERS CAN BE EFFECTED BY THE ADDITION OF SMALL AMOUNTS OF POLYBUTADIENE RESINS AND POWDERED TETRAFLUOROETHYLENE POLYMER FILLER. LIQUID FUNCTIONALLY TERMINATED POLYBUTADIENE AND POWDERED POLYTETRAFLUOROETHYLENE ARE MIXED INTO A TERPOLYMER CONTAINING TRIFLUORONITROSOMETHANE, TETRAFLUOROETHYLENE, AND A SMALL AMOUNT OF NITROSOPERFLUOROBUTYRIC ACID. THE MIXTURE IS CURED IN THE PRESENCE OF A PEROXIDE FREE RADICAL INITIATOR.
摘要:
WHEREIN R is a -O-(lower alkyl) group of one to seven carbon atoms; p is from 1 to 6; T is a halogen, a perhaloalkyl, -NO, and -NO2; and the ratio m : n is from 0 : 1 to 50 : 1, preferrably n can be from 0.1 percent to 10 percent of the units in the polymer. The polymers are cured with such curing agents as an epoxide, a metal oxide, and chromium perfluoroacetate to produce rubbers having good physical properties and chemical resistance. Thus, liquid and solid polymers are provided as well as elastomers derived therefrom.
OR
A cured, nitroso polymer has been provided by curing polymers obtained by polymerizing monomers which have pendant groups convertible to pendant moieties which are crosslinkable. Some of these monomers with the crosslinkable, pendant groups cannot be introduced into the polymer directly. The polymers with the pendant groups are derived from monomers forming recurring units as represented by the general formulas:
ARE PRODUCED BY REACTING METHYL NITRIETE AND PERFLUOROGLUTARIC ANHYDRIDE OR PERFLUOROSUCCINIC ANHYDRIDE AND THEN DECARBOXYLANTING THE RESULATNT PRODUCT. THE COMPOUNDS, WHICH CAN BE HYDROLYZED TO PRODUCE THE CORRESPONDING NITROSO-SUBSTITUTED FLUORCARBON ACIDS, ARE USED AS COMONOMERS IN NITRROSO RUBBERS.