Abstract: The present invention relates to siloxane copolymers containing alkenyl groups and a process for their preparation. The siloxane copolymers of the present invention can be used in cross-linkable compositions for the production of coatings which repel tacky substances, an example of which would include coatings for release papers or films.

Abstract: Organosilicon compounds containing alkenyl groups and comprising average units of the formula ##EQU1## in which R may be the same or different and are selected from monovalent hydrocarbon radicals having from 1 to 18 carbon atom(s) per radical and monovalent halogenated hydrocarbon radicals having from 1 to 18 carbon atom(s) per radical, R.sup.1 may be the same or different and is selected from alkyl radicals having from 1 to 8 carbon atom(s) per radical and alkyl radicals having from 1 to 8 carbon atom(s) per radical, which are substituted by one or more ether oxygen atom(s), a is 0 or 1, with an average of from 0.003 to 1.0, b is 0, 1, 2 or 3, with an average of from 0.0 to 3.0, c is 0, 1, 2 or 3, with an average of from 0.0 to 3.0, and the sum a+b+c.ltoreq.4, with an average of from 1.5 to 4.0, with the proviso that each molecule contains at least one radical A, and A is a radical of the formula(H.sub.2 C=CR.sup.4 CHR.sup.3 O(R.sup.5 O).sub.V H.sub.1-x C=CH.sub.2-y (R.sup.2 (OR.sup.5).sub.w OCHR.sup.3 CR.

Abstract: Siloxane copolymers containing alkenyl groups are prepared by reacting an organic compound (1) containing at least two aliphatic double bonds of the general formulaR.sup.2 (CR.sup.3 .dbd.CH.sup.2).sub.xin which R.sup.2 is a divalent, trivalent or tetravalent hydrocarbon radical having from 1 to 25 carbon atoms per radical, R.sup.3 is a hydrogen atom or an alkyl radical having from 1 to 6 carbon atoms per radical and x is 2, 3 or 4, with an organopolysiloxane (2) having an average of more than one Si-bonded hydrogen atom per molecule, in the presence of a catalyst (3) which promotes the addition of Si-bonded hydrogen to an aliphatic double bond, in which the ratio between the aliphatic double bond in the organic compound (1) and the Si-bonded hydrogen in the organopolysiloxane (2) is such that the alkenyl containing siloxane copolymers thus obtained have an average of more than one alkenyl group per molecule of the formula --CR.sup.3 .dbd.CH.sup.2, in which R.sup.3 is the same as above.

Abstract: Novel siloxane copolymers are described having an average of at least two alkenyloxy groups of the formula--OCR.sup.2 .dbd.CH.sup.2 CH.sub.3,in which R.sup.2 represents hydrogen or a methyl radical.These siloxane copolymers are prepared by reacting in a first stage, an organic compound (1) containing more than two aliphatic double bonds of the formula OCHR.sup.2 CR.sup.2 =CH.sub.2 where R.sup.2 is the same as above, with an organopolysiloxane (2) having at least one Si-bonded hydrogen atom per molecule in the presence of a catalyst (3) which promotes addition of the Si-bonded hydrogen to an aliphatic double bond and in a second stage heating the siloxane copolymer in the presence of a catalyst (4) which promotes shifting of the terminal double bond to form copolymers having an internal double bond.

Abstract: New organosilicon compounds are disclosed which contain (meth)acryloxy groups and consist of average units of the formula ##STR1## in which the radicals R are the same or different and represent monovalent, optionally halogenated hydrocarbon radicals having from 1 to 18 carbon atom(s) per radical, X is a radical which may be the same or different and represents a chlorine atom or a radical of the formula --OR.sup.1, where R.sup.1 represents an alkyl radical having from 1 to 8 carbon atom(s) per radical, which can be substituted by an ether oxygen atom, a is 0 or 1, with an average of from 0.01 to 1.0, b is 0, 1, 2 or 3, with an average of from 0.0 to 3.0, c is 0, 1, 2 or 3, with an average of from 0.0 to 3.0, the sum of a+b+c.ltoreq.4, and is an average of from 1.5 to 4.0, and A is a radical of the formula ##STR2## where x is 0 or 1 and y is 0 or 1, with the proviso that the sum of x+y is 1, z is 1, 2, 3 or 4, R.sup.2 represents a hydrogen atom or a methyl radical, R.sup.

Abstract: Novel siloxane copolymers are described having an average of at least two alkenyloxy groups of the formula--OCHR.sup.2 CR.sup.2 .dbd.CH.sub.2,in which R.sup.2 represents hydrogen or a methyl radical.These siloxane copolymers are prepared by reacting an organic compound (1) containing more than two aliphatic double bonds of the formula OCHR.sup.2 CR.sup.2 .dbd.CH.sub.2 where R.sup.2 is the same as above, with an organopolysiloxane (2) having at least one Si-bonded hydrogen atom per molecule in the presence of a catalyst (3) which promotes addition of the Si-bonded hydrogen to an aliphatic double bond. The resultant siloxane copolymers may be crosslinked with organopolysiloxane containing Si-bonded hydrogen in the presence of hydrosilylation catalysts.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 which A 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.

Abstract: 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.

Abstract: Anhydride-functional organo(poly)siloxanes having average units of the general formula ##EQU1## in which the R(s) are the same or different and represent a monovalent hydrocarbon radical or a monovalent halogenated hydrocarbon radical having from 1 to 18 carbon atom(s) per radical, A represents a radical of the formula ##STR1## in which R.sup.1 represents a hydrogen atom or a monovalent hydrocarbon radical or a monovalent halogenated hydrocarbon radical having from 1 to 12 carbon atom(s) per radical and R.sup.2 represents a hydrogen atom or a monovalent hydrocarbon radical having from 1 to 12 carbon atom(s) per radical, or the two radicals R and R.sup.2 together represent a divalent hyrocarbon radical having from 3 to 5 carbon atoms per radical, R.sup.3 represents a hydrogen atom or a monovalent hydrocarbon radical having from 1 to 4 carbon atom(s) per radical, with the proviso that R.sup.3 is a hydrogen atom if the two radicals R.sup.1 and R.sup.

Abstract: Thermally stable, crosslinked epoxy resins are obtained by crosslinking an epoxy resin with a silicon compound containing a basic nitrogen which is bonded to silicon via carbon and to which at least 1 hydrogen atom is bonded directly to the nitrogen atom, and thereafter conditioning the crosslinked epoxy resin.

Abstract: Substrates which are exposed to weathering are coated with paints containing an epoxy resin and a silicon compound containing basic nitrogen which is bonded to the silicon via a carbon and which has at least one hydrogen atom bonded directly to the nitrogen atom.

Abstract: (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.

Abstract: Bisacylphosphine oxides of the general formula ##STR1## wherein R.sup.1 stands, for example, for a straight-chain or branched C.sub.1-18 alkyl radical,a cyclohexyl, cyclopentyl, phenyl, naphthyl, or biphenylyl radical,a cyclopentyl, cyclohexyl, phenyl, naphthyl, or biphenylyl radical substituted by F, Cl, Br, I, C.sub.1 -C.sub.12 alkyl and/or C.sub.1 -C.sub.12 alkoxyl, oran S or N-containing 5-membered or 6-membered heterocyclic ring, andR.sup.2 and R.sup.3, which are the same or different, stand for a cyclohexyl, cyclopentyl, phenyl, naphthyl, or biphenylyl radical,a cyclopentyl, cyclohexyl, phenyl, naphthyl, or biphenylyl radical substituted by F, Cl, Br, I, C.sub.1-4 alkyl and/or C.sub.1-4 alkoxyl, oran S or N-containing 5-membered or 6-membered heterocyclic ring; orR.sup.2 and R.sup.3 are joined to form a ring which contains from 4 to 10 carbon atoms and which may be substituted by 1 to 6 C.sub.1-4 alkyl radicals.The compounds are prepared by oxidation of the corresponding bisacylphosphines.

Abstract: Bisacylphosphine oxides of the general formula ##STR1## wherein R.sup.1 stands, for example, for a straight-chain or branched C.sub.1-18 alkyl radical,a cyclohexyl, cyclopentyl, phenyl, naphthyl, or biphenylyl radical,a cyclopentyl, cyclohexyl, phenyl, naphthyl, or biphenylyl radical substituted by F, Cl, B, I, C.sub.1 -C.sub.12 alkyl and/or C.sub.1 -C.sub.12 alkoxyl, oran S or N-containing 5-membered or 6-membered heterocyclic ring, andR.sup.2 and R.sup.3, which are the same or different, stand for a cyclohexyl, cyclopentyl, phenyl, naphthyl, or biphenylyl radical,a cyclopentyl, cyclohexyl, phenyl, naphthyl, or biphenylyl radical substituted by F, Cl, Br, I, C.sub.1-4 alkyl and/or C.sub.1-4 alkoxyl, oran S or N-containing 5-membered or 6-membered heterocyclic ring; orR.sup.2 and R.sup.3 are joined to form a ring which contains from 4 to 10 carbon atoms and which may be substituted by 1 to 6 C.sub.1-4 alkyl radicals.The compounds are prepared by oxidation of the corresponding bisacylphosphines.