摘要:
A fluorine-containing organopolysiloxane represented by the following average compositional formula (1) (Z2Q)βRf(QZ1Aα)2-β (1) wherein Rf is a divalent group containing a perfluoroether residue, Q is a divalent organic group, Z1 is a di- to nona-valent organopolysiloxane residue and may contain a silalkylene bond, α is an integer of from 1 to 8, β is a number larger than 0 and smaller than 2, Z2 is a monovalent group represented by the following formula (2) wherein b is an integer of from 1 to 10, R1 may be the same with and different from each other and is an alkyl group having 1 to 4 carbon atoms or a phenyl group, and A is a monovalent group represented by the following formula (3) wherein R2 is an alkyl group having 1 to 4 carbon atoms or a phenyl group, X is a hydrolyzable group, a is 2 or 3, and c is an integer of from 1 to 6.
摘要:
An organopolysiloxane represented by the following general formula (A), (B) or (C) SinR12n+2On−1 (A) SinR12nOn (B) SinR12n+2R2kOn−k (C) wherein R1 may be the same with or different from each other and is a hydrogen atom or a monovalent organic group, R2 is an alkylene group having 2 to 6 carbon atoms, n is an integer of from 2 to 40 and k is an integer of 1 to 3, characterized in that at least two R1's are represented by the following formula (i): wherein X is a hydrolyzable group, R3 is an alkyl group having 1 to 4 carbon atoms or a phenyl group, y is an integer of from 1 to 5 and a is 2 or 3; and one SiR1 bond is represented by the following formula (ii) or one SiOSi bond is replaced with a bond represented by the following formula (iii): SiQRf1 (ii) SiQRf2QSi (iii) wherein Rf1 is a monovalent group containing a perfluoroether residue, Rf is a divalent group containing a perfluoroether residue, and Q is a divalent organic group.
摘要:
Fluorinated organosilicon compounds having formula (1) wherein Rf is a perfluoroalkyl group containing at least one ether bond, Q is a polyether group in the form of a homopolymer chain of ethylene glycol or propylene glycol or a copolymer chain of both, R is hydrogen or alkyl, X is a divalent linking group exclusive of oxygen atom, Y is a divalent linking group, p is an integer of at least 3, and n is a number of 0
摘要:
Perfluoropolyether compositions are provided comprising (A) a linear perfluoropolyether compound containing at least two alkenyl groups, having a perfluoropolyether structure comprising recurring units —CaF2aO— in its backbone, and having a Mw of 10,000-100,000; (B) an organosilicon compound containing at least two silicon atom-bonded hydrogen atoms; (C) a reinforcing filler; (D) a hydrosilylation catalyst; and (E) a polyfluoromonoalkenyl compound containing one alkenyl group and having a perfluoropolyether structure in its backbone. The compositions cure into rubber or gel products having improved acid resistance.
摘要:
An anti-offsetting oil including an organopolysiloxane having the formula (1) below and containing low molecular weight organopolysiloxanes having a molecular weight of 3,000 or less in a content of 50 ppm or less. ##STR1## wherein R.sub.f 's represent a perf luoroalkyl which may contain at least one ether linkage; R's represent a monovalent hydrocarbon group; Y's represent a divalent organic group having 2 to 5 carbon atoms; a represents an integer of 1 or more and b represents an integer of 0 or more, provided that a and b satisfy 3a+3b+2=15 to 4,000; and c and d are an integer of 0 to 3. This fluid has a good wettability to silicone rubber or fluorine forming the surfaces of fixing rolls of electrophotographic copying machines, and hence can effectively prevent offset. Since it contains no low-molecular weight organopolysiloxanes, the electric-contact failure may hardly occur.
摘要:
Fluorine-containing organosilicon compounds having the following general formula:CH.sub.2 .dbd.CHCH.sub.2 NHCO--[Rf--CONH(CH.sub.2).sub.3 --Q--(CH.sub.2).sub.3 NHCO].sub.a --Rf--CONHCH.sub.2 CH .dbd.CH.sub.2wherein a is an integer of 1 or above, Rf is a divalent perfluoropolyether group, and Rf is a divalent cyclosiloxane group containing an unsubstituted or substituted monovalent hydrocarbon group without an aliphatically unsaturated bond. The compounds are of use as a starting material in synthesizing rubbers or mold release agents which are high in such properties as solvent resistance, chemical resistance and the like.
摘要:
A pressure-sensitive adhesive structure such as a pressure-sensitive adhesive tape, label or the like having a release agent layer, wherein said release agent layer comprises a cured fluorosilicone composition comprising:(a) a particular organopolysiloxane having in its molecule silicon-bonded alkenyl groups and at least one member selected from the group consisting of silicon-bonded fluorine-containing substituents represented respectively by Formulas (1) to (4): ##STR1## where n is an integer of 1 to 5. ##STR2## where n is an integer of 1 to 5.C.sub.m F.sub.2m+1 CH.sub.2 CH.sub.2 OCH.sub.2 CH.sub.2 CH.sub.2 --(3) where m is an integer of 3 to 10.C.sub.m F.sub.2m+1 CH.sub.2 OCH.sub.2 CH.sub.2 CH.sub.2 -- (4) where m is an integer of 3 to 10.(b) an organohydrogenpolysiloxane; and(c) a catalyst, in a particular proportion. The release properties of the release agent layer show good and high stability with time, promising practical utilities over a long period of time.
摘要:
An object of the present invention is to provide a fluorooxyalkylene group-containing polymer composition, which yields a coating having excellent adhesior to a substrate, good water- and oil-repellency, a low dynamic friction coefficient, good releasing property, good abrasion resistance and good stain resistance, and to provide a surface treatment agent comprising the same. The present inventors have found that a composition comprising a fluorooxyalkylene group-containing polymer having a fluorinated group and a hydrolyzable group at each terminal and a fluorooxyalkylene group-containing polymer having hydrolyzable groups at both terminals can form a coating which has excellent water- and oil-repellency, a low dynamic friction coefficient, good releasing property, good abrasion resistance, and good stain resistance.
摘要:
A coating composition comprising a fluorine-containing silicon compound represented by the following formula (1) wherein Z is a linear or branched divalent polyorganosiloxane residue having 1 to 40 siloxane units, R is an alkyl group having 1 to 4 carbon atoms or a phenyl group, X is a hydrolyzable group, Q is a C2-12 divalent connecting group, a is an integer of 2 or 3, b is an integer of from 1 to 10, y is an integer of 1 to 5, and Rf is a group represented by the following formula (2) -Rf1-(Q-W-Q-Rf1)q- (2) wherein Rf1 is a perfluoropolyether residue, W is an organopolysiloxane residue having 1 to 40 siloxane units and Q is as defined above and may be the same with or different from each other, and q is an integer of from 0 to 3, and at least one solvent selected from the group consisting of alcohols, esters, ethers, ketones, and perfluoroethers. The coating prepared from the composition is oil-repellent, water-repellent and has water sliding property.
摘要:
A solventless releaser composition is provided comprising (A) an organopolysiloxane containing at least two alkenyl groups and at least one monovalent fluorinated substituent group and having a fluorine content of 30-50 wt % and a viscosity of 100-2,000 mPa-s at 25° C., (B) an organohydrogenpolysiloxane containing at least three SiH groups, (C) a reaction regulator, and (D) a platinum catalyst. The composition is coated and cured to a substrate to form a release liner for use with silicone pressure-sensitive adhesives.