摘要:
Alkenyl ether-siloxane compositions comprising(A) an oligomeric or polymeric organosilicon compound having on average more than one alkenyloxy group of the formulaR.sup.2 --CH.dbd.CH--O-- (VI)(B) a monomeric maleic and/or fumaric acid compound of the formula ##STR1## in which R.sup.2 is a hydrogen atom or the methyl radical,R.sup.3 is identical or different and is a hydrogen atom, a hydrocarbon radical having 1 to 16 carbon atoms, which can be interrupted by oxygen, sulfur or oxygen- or silicon-containing units, a substituted hydrocarbon radical having 1 to 6 carbon atoms, a silyl radical or a siloxanyl radical,R.sup.4 is identical or different and is a hydrogen atom, chlorine, bromine, fluorine or an optionally substituted alkyl radical andZ is an oxygen atom or a radical --NR.sup.5 --, where R.sup.5 has one of the meanings given for R.sup.3,optionally(C) initiators which form free radicals and optionally(D) inhibitors for regulating the pot life.
摘要:
The invention concerns iodonium salts of the general formula A-I.sup.+ --B X.sup.-, in which A is a group of the general formula ##STR1## in which C is a monovalent aromatic hydrocarbon group with 6 to 14 carbon atoms or a monovalent aromatic hydrocarbon group containing at least one oxygen and/or sulphur atom and with 5 to 14 atoms in the aromatic ring, D, E and F are each substituents of C, D being a group of the formula --(O).sub.x --(R).sub.y --SiR1/3, E being a group of the formula --OR.sup.2, F being a group of the formula --R.sup.3, a being 1, 2, or 3, b being 0, 1 or 2, c being 0, 1 or 2, x being 0 or 1 and y being 0 or 1, and R, R.sup.1, R.sup.2 and R.sup.3 are as defined in claim 1; B is a group of the formula ##STR2## in which E and F, which are as defined above, may each be bound to the 2, 3, 4, 5 or 6 position in the benzene ring, d is 0, 1 or 2, e is 0, 1 or 2 and X.sup.- is a tosylate anion or a weakly nucleophilic or non-nucleophilic anion Y.sup.- selected from the group comprising CF.sub.3 CO.sub.2.sup.-, BF.sub.4.sup.-, PF.sub.4.sup.-, AsF.sub.6.sup.-, SbF.sub.6.sup.-, ClO.sub.4.sup.-, HSO.sub.4.sup.- and CF.sub.3 SO.sub.3.sup.-.
摘要:
The Thermocurable compositions which contain(A) at least one mercaptoalkyl-containing compound which contains at least two SiC-bonded radicals per molecule of the general formulaHS--R.sup.2 -- (I) where R.sup.2 represents a divalent hydrocarbon radical having from 1 to 8 carbon atom(s) per radical, selected from the group consisting mercaptoalkyl-containing organopolysiloxanes and cocondensates of mercaptoalkyl-containing organosilicon compounds containing groups capable of condensation, and hydroxyl-containing organic compounds,(B) at least one vinyl-containing compound which is compatible with constituent (A) and contains at least two groups per molecule of the general formulaR.sup.4 CH.dbd.CR.sup.3 C(O)O-- (II) where R.sup.3 represents a hydrogen atom or a methyl radical, and R.sup.4 represents a hydrogen atom or an alkyl radical having from 1 to 3 carbon atom(s) per radical, and(C) a mixture of a strong organic base selected from the group consisting of quaternary ammonium hydroxides, quaternary ammonium alkoxides, tertiary, secondary and primary amines, and a weak protonic acid.
摘要:
The invention relates to novel organopolysiloxanes which contain sulfosuccinate groups and consist of average units of the general formula ##EQU1## in which R is the same or different monovalent hydrocarbon radicals having from 1 to 18 carbon atom(s) per radical or monovalent halogenated hydrocarbon radicals having from 1 to 18 carbon atom(s) per radical, Z is a radical of the formula ##STR1## in which Y represents a radical of the formula ##STR2## R.sup.1 is a hydrogen atom or an alkyl radical having from 1 to 4 carbon atom(s) per radical, M.sup.+ represents a hydrogen ion and/or an alkali metal ion or an ammonium ion, a is 0 or 1, with an average of from 0.03 to 1.0, b is 0, 1, 2 or 3, with an average of from 1.0 to 2.5, and the sum of a+b is no greater than 3, with the proviso that the compound contains at least one radical Z per molecule.
摘要:
Crosslinkable compositions containing(1) An organopolysiloxane having alkenyloxy functional groups and containing Si-bonded radicals Y of the formula--(CH.sub.2).sub.2 --R.sup.1 --(A--R.sup.2).sub.z --O--R.sup.3 --CH.dbd.CH.sub.2, in whichA represents --O--, --S--or ##STR1## group, R.sup.1 represents a straight-chain or branched alkylene radical having from 1 to 7 carbon atoms per radical of a cycloalkylene radical having from 5 to 7 carbon atoms per radical,R.sup.2 represents a straight-chain or branched alkylene radical having from 2 to 4 carbon atoms per radical, which can be substituted by a hydroxyl group, methoxy group, ethoxy group or trimethylsiloxy group,R.sup.3 represents a straight-chain or branched alkylene radical having from 1 to 7 carbon atoms per radical, and z is 0, 1 or 2,(2) an organopolysiloxane containing Si-bonded hydrogen atoms, and(3) a catalyst which promotes the addition of Si-bonded hydrogen to an aliphatic double bond.
摘要:
Novel, alkenyloxy-functional organosilicon compounds are described which contain at least one Si-bonded Y radical per molecule having the formula--(CH.sub.2).sub.2 --R.sup.2 --(A--R.sup.3).sub.z --O--CH.dbd.CH--CH.sub.2 --R.sup.4 (I),in whichA represents --O--, --S-- or ##STR1## R.sup.2 represents a linear or branched alkylene radical having from 1 to 7 carbon atom(s) per radical or a cycloalkylene radical having from 5 to 7 carbon atoms per radical, R.sup.3 represents a linear or branched alkylene radical having from 2 to 4 carbon atoms per radical, which may be substituted by a hydroxyl group, methoxy group, ethoxy group or trimethylsiloxy group, R.sup.4 represents a hydrogen atom or an alkyl radical having from 1 to 4 carbon atoms(s) per radical, and z is 0, 1 or 2.The alkenyloxy-functional organosilicon compounds are preferably silanes or organopolysiloxanes.The alkenyloxy-functional organopolysiloxanes can be crosslinked, for example, with ultraviolet light. These organopolysiloxanes can also be used for preparing coatings.
摘要:
Novel organosilicon compounds containing alkenyl groups and comprising units of the average formula ##STR1## in which R and R.sup.1 are hydrocarbon containing groups, and A is a radical of the formula ##STR2## in which R.sup.2, R.sup.3 and R.sup.4 are hydrocarbon containing groups; x is 0 or 1; y is 0 or 1, with the proviso that the sum x+y is 1 or 2; a is 0 or 1, with an average of 0.003 to 1.0; b is 0, 1, 2 or 3, with an average of 0.0 to 3.0; c is 0, 1, 2 or 3; with an average of 0.0 to 3.0; and the sum a+b+c.ltoreq.4, with an average of 1.5 to 4.0, with the proviso that each molecule contains at least one A radical and a method for preparation of the novel compounds are disclosed.
摘要:
Organo(poly)siloxanes having Si-linked, conjugated dienyl groups are prepared by adding a secondary or tertiary acetylenic alcohol (1) to an organo(poly)siloxane (2) having at least one Si-linked hydrogen atom in the presence of a catalyst (3) which promotes the addition of Si-linked hydrogen to an aliphatic multiple bond, and then eliminating water by an intramolecular reaction in the presence of an acid catalyst (4) from the alkenol groups of the organo(poly)siloxane thus obtained.
摘要:
(Methy)acrylic acid esters of the general formula(Mo).sub.n --[--A--O--CO--CH.sub.2 --O--CH.sub.2 --CH.sub.2 --O--CH.sub.2 --CO--O--].sub.x --A--(OM).sub.nare described whereinA is an alcohol radical having at least 4 chain atoms between two junction sites.M is CH.sub.2 .dbd.C(R.sup.1)--CO wherein R.sup.1 stands for hydrogen or methyl,n is 1 or 2, andx is 0.3 to 3.These esters are suited for the preparation of dental compositions.
摘要:
Mixtures of silicone resin with an organopolysiloxane copolymer prepared by hydrosilylating a substantially linear polymer containing an isocyanate reactive group with an Si—H containing organopolysiloxane, and reacting this intermediate with a diisocyanate, are useful as long lasting defoamers which are compatible with numerous media.