摘要:
Fluorinated amide compounds of formula (1) wherein Rf is a perfluoroalkyl or perfluoropolyether group having 1 to 800 carbon atoms, R is hydrogen, methyl or phenyl, and letter a is 1, 2 or 3 are novel and useful as a modifier intermediate capable of improving various properties of silicone and liquid fluororubber. ##STR1##
摘要:
In a curable composition comprising (A) a fluorinated amide compound, (B) a fluorinated organohydrogensiloxane having at least one monovalent perfluorooxyalkyl, monovalent perfluoroalkyl, divalent perfluorooxyalkylene or divalent perfluoroalkylene group, and at least two hydrosilyl groups in a molecule, and (C) a platinum catalyst is blended a tackifier (D) in the form of an organosiloxane having at least one hydrogen atom directly attached to a silicon atom and at least one epoxy or trialkoxysilyl group attached to a silicon atom through a carbon atom or a carbon atom and an oxygen atom. The composition cures into a cured product which exhibits satisfactory properties and firmly bonds to metallic and plastic substrates by brief heating at low temperature.
摘要:
A linear polyfluoro compound having at least two alkenyl groups as a base component is blended with a linear polyfluoro compound having one alkenyl group and a hydrosilyl-bearing linear polysiloxane having fluoroalkyl substituents in side chains and at ends thereof. With a platinum catalyst added, there is obtained a curable composition having improved storage stability which will quickly cure into satisfactory gel products.
摘要:
Curable fluoropolyether rubber composition: This composition comprises (A) a straight chain fluoropolyether compound having at least two alkenyl groups in its molecule and having a divalent perfluoropolyether structure in its backbone chain, (B) a polytetrafluoroethylene, (C) an organohydrogenpolysiloxane having at least two hydrogen atoms bonded to silicon atoms in its molecule, and (D) a hydrosilylation reaction catalyst. The composition is provided in the form of a paste capable of forming into optional shapes, and its cured product is well-balanced in and is excellent in properties such as heat resistance, chemical resistance, solvent resistance, releasability, lubricating qualities, water repellency, oil repellency and weatherability.
摘要:
Novel siloxane compounds are provided which have 1-5 hydrogen atoms each attached to a silicon atom (SiH group) and 1-5 epoxy or alkoxy - containing organic groups each attached to a silicon atom in a molecule. These siloxane compounds are useful tackifiers to conventional resins, have good affinity to fluorinated silicone resins and rubbers so that they impart adhesion to fluorinated silicone resins and rubbers, and contribute to solvent resistance and minimal moisture permeability.
摘要:
An addition-curable composition is comprised essentially of (A) a linear perfluoro compound containing at least two alkenyl groups per molecule and having a perfluoro structure in its backbone chain, (B) a linear perfluoro compound containing one alkenyl group per molecule and having a perfluoro structure in its backbone chain, (C) an organosilicon compound containing at least two hydrosilyl groups per molecule, and (D) a platinum family metal catalyst. A cured gel product obtained from the composition has a penetration of 1 to 200 (ASTM D-1403 using 1/4-scale cone). The composition can form a fluorine-containing cured gel product excellent in chemical resistance and solvent resistance, and low in moisture permeability.
摘要:
Novel fluorinated unsaturated glycidyl ethers are prepared by reacting 1,1,1-trifluoro-2-trifluoromethyl-3-buten-2-ol or 1,1,1-trifluoro-2-trifluoromethyl-4-propen-2-ol with chloromethyloxirane in the presence of onium salts. The fluorinated unsaturated glycidyl ethers are, in turn, subject to addition reaction with hydrosilanes in the presence of transition metal catalysts, obtaining novel silicon-modified glycidyl ethers or fluorinated organic silicon compounds.
摘要:
Novel siloxane compounds having a fluorinated group, an SiH group reactive with silicone resins, and an epoxy-bearing organic group attached to a silicon atom, each in a backbone, are effective for providing adhesion and are useful tackifiers for various resins.
摘要:
A fluorine-containing organosilicon compound having the formula (1): ##STR1## wherein X is a hydrolizable group, R.sup.1 is a monovalent organic group, R.sup.2 is a methyl group or a hydrogen atom, n is an integer of 1, 2 or 3, and m is an integer of 0 or 1, and a process of producing said compound. The compound may be used as a silane coupling agent capable of improving not only the strength of laminated sheets of polyester resin and glass and polyester resin concrete but also water and heat resistances.
摘要:
A fluorinated curable composition contains as main components, (A) a linear polyfluoro compound of the formula (1): CH2═CH—(X)a—Rf1—(X)a—CH═CH2 (1) wherein X is —CH2—, —CH2O—, etc., Rf1 is a divalent perfluoroalkylene or perfluorooxyalkylene group, and “a” is 0 or 1, (B) a linear polyfluoro compound of the formula (2): Rf2—(X)a—CH═CH2 (2) wherein X and “a” are as defined above, and Rf2 is a monovalent perfluoroalkyl or perfluorooxyalkyl group, (C) an organosilicon compound having at least two hydrosilyl groups, (D) a platinum group catalyst, and (E) a fluorinated organopolysiloxane. The composition is vacuum deaeratable and foam breakable, cures into a gel having improved chemical and solvent resistance, and is suited for the potting, sealing and coating of electric and electronic parts.