摘要:
A fluoropolyether adhesive composition comprising (A) a linear polyfluoro compound having at least two alkenyl groups and a perfluoropolyether structure in its main chain, (B) a fluorinated organohydrogensiloxane containing at least two SiH groups, but not alkoxy and epoxy groups, (C) a platinum group metal-based catalyst, (D) an organosilicon compound having at least one silicon-bonded alkoxy group, and (E) a hydrolytic catalyst can be cured to metal and plastic substrates through addition reaction.
摘要:
An adhesive composition is provided comprising (A) a fluorinated amide compound containing at least two vinyl groups and having a polyfluoro structure, (B) a fluorinated organosilicon compound containing a fluorinated organic group, at least two SiH groups, and an alkyl, aryl or aralkyl group, and (C) a platinum catalyst, and (D) an organosiloxane containing a SiH group and an epoxy and/or trialkoxysilyl group. The composition is cured on brief heating into a product which achieves adhesion to various substrates and has solvent resistance, chemical resistance, heat resistance, low-temperature properties, low moisture permeability, electric insulation, and acid resistance.
摘要:
A coating composition comprises a fluoroelastomer composition and a diluent solvent consisting of a perfluoroalkyl-substituted aromatic compound and a perfluoro organic compound, the fluoroelastomer composition comprising (A) a linear perfluoropolyether compound, (B) a fluorinated organohydrogensiloxane, (C) a platinum catalyst, and (D) an organopolysiloxane containing an SiH group and an epoxy or trialkoxysilyl group. The composition cures into a fluoroelastomer having excellent characteristics and achieves a firm adhesion to a broad range of substrates by brief heating at relatively low temperatures.
摘要:
In an automotive electric/electronic package comprising an electronic component, a case for receiving the electronic component therein, and a lid covering an open top of the case, the case and the lid are joined together with a fluorochemical adhesive capable of chemically and/or physically adsorbing a corrosive gas. The package has highly reliable corrosion resistance in that the electronic component is protected from corrosion by corrosive acidic or basic gases such as sulfur compound and nitrogen oxide gases.
摘要:
A heat-curable fluoropolyether adhesive composition comprising (A) a linear polyfluoro compound having at least two alkenyl groups and a perfluoropolyether structure, (B) a fluorinated organohydrogensiloxane having at least two SiH groups, (C) a platinum group metal catalyst, (D) an organosiloxane having at least one SiH group and at least one epoxy and/or trialkoxysilyl group, and (E) a compound having at least two allyloxycarbonyl groups can be cured to metal and plastic substrates by heating at a temperature from 20° C. to less than 100° C.
摘要:
An adhesive composition comprising the following components: (A) a linear polyfluoro compound having at least two SiH bonds per molecule and a perfluoropolyether residue in a main chain of the linear polyfluoro compound (A); (B) an organohydrogensiloxane having a fluorinated group and at least two hydrogen atoms each bonded to a silicon atom per molecule; (C) a compound of a platinum group metal; (D) hydrophobic silica powder; (E) an alkoxysilane represented by the following formula (1) (RO)3—Si-T (1) wherein R is a monovalent hydrocarbon group, T is a group represented by the formula, —OR1 or —CHR2—COOR3, wherein R1 is a monovalent hydrocarbon group, which may be the same with or different from R, R2 is a hydrogen atom or a methyl group and R3 is a monovalent hydrocarbon group; and (F) an organosiloxane having at least one SiH bond and at least one group selected from the group consisting of an epoxy group and a trialkoxysilyl group. The composition has no quality variation from lot to lot and gives a cured product having good resistance to solvents and heat, and durability.
摘要:
A sealant used for the protection of an electric or electronic part is removed by contacting the sealant with tetramethylammonium hydroxide, tetrabutylammonium fluoride or the like for thereby dissolving the sealant. The method is capable of removing only the protective sealant from the electric or electronic part without causing damage to other components of the part.
摘要:
A curable composition comprising (A) a polyfluorodialkenyl compound having at least two alkenyl radicals, (B) a fluorinated organohydrogensiloxane having at least two Si—H radicals, (C) a platinum group compound, (D) a hydrophobic silica powder, and (E) an organosiloxane having a Si—H radical and a trialkyl or trialkoxy-containing organic radical attached to a silicon atom cures into a product having improved solvent resistance, chemical resistance, heat resistance, low-temperature properties, low moisture permeability and electric properties and exhibiting good adhesion to a variety of substrates including metals and plastics by brief heating at relatively low temperatures.
摘要:
In a semiconductor pressure sensor device comprising a housing (1) having a cavity (3), a semiconductor sensor chip (2) mounted within the cavity, leads (4) for conveying pressure detection signals, and bonding wires (6) electrically connecting the sensor chip and the leads, a sensitive portion (2a) of sensor chip (2), leads (4) and bonding wires (6) are covered with an electrically insulating fluorochemical gel material which has a penetration of 30-60 according to JIS K2220, a Tg of up to −45° C., and a degree of saturation swelling in gasoline at 23° C. of up to 7% by weight. The sensor device is improved in operation reliability and durability life.
摘要:
In fluorinated curable compositions comprising alkenyl group-bearing perfluoropolyethers as the base polymer to ensure chemical resistance and solvent resistance together with an organohydrogensiloxane and a platinum group metal catalyst, a hydrophobized silica fine powder is used in combination therewith to render the compositions thixotropic.