摘要:
Hydrophilic siloxane copolymers are prepared by (a) reacting organopolysiloxanes having at least one Si-bonded hydrogen atom with substantially linear oligomeric or polymeric compounds of formula R1-(A-CnH2n)m-A1-H (I) where R1 is a monovalent optionally substituted, hydrosilylatable hydrocarbyl radical, A is a bivalent polar organic radical selected from —O—, —C(O)—O—, —O—C(O)—, —O—C(O)—O—, —C(O)—NH—, —NH—C(O)—, urethane radicals and urea radicals, A1 is a bivalent polar organic radical selected from —O—, —NH— and —NR′—, n is an integer from 1 to 20, and m is zero or a positive integer, (b) reacting the resulting intermediate with organic compounds which have two or more isocyanate groups, in the presence of further organic compounds (6) reactive toward isocyanate groups and containing at least one tertiary amine group, and (c) quaternizing the amino-group-containing intermediate from step (b) with an alkylating agent (8), with the proviso that the water content of the compounds (1) and (2) is lower than 2000 weight ppm.
摘要:
Antimisting additives are used in crosslinkable silicone coating compositions for reducing aerosol formation, the antimisting additives being alkenyl-functional siloxane copolymers prepared by reacting a hydrocarbon containing at least three aliphatic double bonds, and with an organosiloxane (2) having terminal Si-bonded hydrogen atoms in the presence of a hydrosilylation catalyst (3) at a ratio of Si-bonded hydrogen to aliphatic double bonds of from 1.3 to 10, and subsequently reacting the resulting SiH-containing hydrocarbon-siloxane copolymer with an α,ω-dialkenylsiloxane polymer (4) in the presence of a hydrosilylation catalyst (3) at a ratio of aliphatic double bonds to Si-bonded hydrogen of from 1.2 to 10, and optionally, in another step, equilibrating the resulting alkenyl-functional siloxane copolymers with an organopolysiloxane (5).
摘要:
The present invention relates to a process for adding Si-bonded hydrogen to aliphatically unsaturated compounds containing carbon-carbon multiple bonds and ether oxygen atoms in the presence of carbinol groups, wherein the reaction mixture comprises, as a further component, at least one cyclic ether.
摘要:
The invention describes new organosilicon compounds containing alkenyl groups, comprising units of the formula A a R b ( R 1 O ) c SiO 4 - ( a + b + c ) 2 , ( I ) where R are identical or different and are each a monovalent hydrocarbon radical which is free of aliphatic carbon-carbon multiple bonds, has from 1 to 20 carbon atom(s) per radical and may contain from 1 to 4 oxygen atom(s), R1 are identical or different and are each a monovalent hydrocarbon radical which is free of aliphatic carbon-carbon multiple bonds and has from 1 to 8 carbon atom(s) per radical, a is 0 or 1, b is 0, 1, 2 or 3, c is 0, 1, 2 or 3, preferably 0, where the sum a+b+c≦3, A is a radical of the formula —(R2)d—Y(—CH═CHR3)2 where R2 is a divalent hydrocarbon radical which is free of aliphatic carbon-carbon multiple bonds and has from 1 to 6 carbon atom(s), R3 are identical or different and are each a hydrogen atom or are as defined for R, Y is a trivalent hydrocarbon radical which has from 2 to 20 carbon atoms and may contain from 1 to 4 oxygen atom(s) and d is 0 or 1, with the proviso that the organosilicon compounds have at least two units of the formula (I) and at least one radical A per molecule.
摘要:
Linear organopolysiloxanes containing alpha, omega terminal Si bonded omega-alkenyl groups or alpha, omega Si bonded H are prepared via hydrosilylation.
摘要:
Crosslinkable compositions comprise novel organosilicon compounds (B.sup.1) containing Si-bonded hydrogen atoms and comprising(a) units of the formulaH.sub.a R.sub.2-a SiO.sub.2 O.sub.2/2 (I), where R is as defined in claim 1 and a is 0, 1 or 2, with the proviso that at least 20 mol % of the units of the formula (I) are ones in which a is 1 or 2,(b) carbostructural units G (II), where G are identical or different and are each a trivalent to decavalent aliphatic hydrocarbon radical having from 7 to 30 carbon atoms per radical, which may contain one or more heteroatoms selected from the group consisting of oxygen, boron, silicon, tin or titanium, with the proviso that at least three Si atoms are connected to one another via G,(c) units of the formula ##STR1## where b is 0, 1 or 2, with the proviso that b in formula (III') is not 2 and with the proviso that the units of the formula (III) or (III') are connected via the Si atoms to the carbostructural units G and(d) units of the formulaH.sub.c R.sub.3-c SiO.sub.1/2 (I), where c is 0, 1 or 2, with the proviso that the organosilicon compounds (B.sup.1) contain on average at least 6 Si-bonded hydrogen atoms.
摘要:
Novel organosilicon compounds containing 1-alkenyloxy groups and comprising units of the formula ##STR1## where R are identical or different and are each a monovalent, halogenated or unhalogenated hydrocarbon radical having from 1 to 18 carbon atom(s) per radical,X are identical or different and are each a chlorine atom or a radical of the formula --OR.sup.1,where R.sup.1 is an alkyl radical having from 1 to 8 carbon atom(s) per radical which may be substituted by an ether oxygen atom,a is 0 or 1, b is 0, 1, 2 or 3, c is 0, 1, 2 or 3, and the sum a+b+c.ltoreq.4,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 x+y is 1 or 2,z is 0 or an integer from 1 to 12,R.sup.2 is a hydrogen atom or a methyl radical,R.sup.3 can be identical or different and are each a linear or branched alkylene radical having from 1 to 6 carbon atom(s) per radical,R.sup.4 is a linear or branched alkylene radical having from 1 to 6 carbon atom(s) per radical, with the proviso that at least one radical A is present per molecule, are described.
摘要翻译:含有1-烯氧基的新型有机硅化合物,并且包含下式的单元,其中R相同或不同,并且各自为每个基团具有1至18个碳原子的单价,卤代或未卤化烃基,X相同或不同, 各自为氯原子或式-OR1的基团,其中R 1为可被醚氧原子取代的每个基团具有1至8个碳原子的烷基,a为0或1,b为 0,1,2或3,c是0,1,2或3,并且和a + b + c 4,A是下式的基团,其中x是0或1,y是0或1 条件是和x + y为1或2,z为0或1至12的整数,R 2为氢原子或甲基,R 3可以相同或不同,并且各自为直链或支链亚烷基 每个基团具有1至6个碳原子的基团,R 4是每个基团具有1至6个碳原子的直链或支链亚烷基,条件是至少一个基团 A描述每个分子。
摘要:
The invention relates to organopolysiloxane copolymers having at least one Si-bonded vinyloxy-functional group and their preparation. The compositions of the present compound crosslink particularly rapidly under light.
摘要:
Organosilicon compounds containing furanyl groups which contain units of the formula ##EQU1## in which R is identical or different and is a hydrogen atom or monovalent, SiC-bonded, aliphatically saturated, optionally substituted hydrocarbon radical, which can be interrupted by oxygen atoms, R.sup.1 is identical or different and is an optionally substituted hydrocarbon radical having 1 to 8 carbon atoms, which can be interrupted by 1 to 3 oxygen atoms. A is identical or different and is an SiC-bonded furanyl radical of the formula ##STR1## where R.sup.2 has the meaning given above for the radical R and R.sup.3 is a divalent hydrocarbon radical having 2 to 30 carbon atoms, which can contain one or more groups, chosen from the group consisting of ##STR2## a is 0, 1, 2 or 3, b is 0, 1 or 2 and c is 0, 1 or 2, with the proviso that the sum a+b+c is less than or equal to 3 and the organosilicon compound contains at least one radical A per molecule.
摘要:
Compositions which comprise(A) a polymeric organosilicon compound having 1 to 6 Si-bonded hydrogen atoms per molecule,(B) a polymeric organosilicon compound having at least two alkenyl groups per molecule and a viscosity of not more than 100 mm.sup.2 /s,(C) a polymeric organosilicon compound having on average at least 10 Si-bonded hydrogen atoms per molecule,(D) a catalyst and, optionally(E) an inhibitor,with the proviso thatthe molar ratio of all the Si-bonded hydrogen atoms to all the SiC-bonded alkenyl groups in the composition is on average less than 1,the composition comprises (B) in an amount such that the composition comprises on average at least 1.1 alkenyl radicals of (B) per Si-bonded hydrogen atom of (A)and the content of Si-bonded hydrogen atoms of (C) is 5% to 50%, based on the number of all the Si-bonded hydrogen atoms present.