摘要:
3-Acryloyloxypropylalkoxysilanes of formula I:CH.sub.2 .dbd.C(R)C(O)O(CH.sub.2).sub.3 Si(R.sup.1).sub.a (OR.sup.2).sub.3-a (I)are prepared by reacting a hydridosilane of formula II:HSi(R.sup.1).sub.a (OR.sup.2).sub.3-a (II)with an allyl ester of formula III:CH.sub.2 .dbd.C(R)C(O)OCH.sub.2 CH.dbd.CH.sub.2 (III),where R is a hydrogen atom or a methyl group, R.sup.1 and R.sup.2 are each C.sub.1 to C.sub.6 alkyl groups or phenyl groups, and a is 0, 1 or 2, in the presence of a platinum catalyst.
摘要:
Alkylhydrogenchlorosilanes of formula I:R.sub.x HSiCl.sub.y (I)wherein R are identical or different alkyl radicals, x is 1 or 2 and y is 1 or 2 and the sum of x and y is equal to 3, are prepared by comproportionating alkylchlorosilanes of formula II:R.sub.a SiCl.sub.n (II)wherein R denotes identical or different alkyl radicals, a is 1 or 2 and n is 2 or 3 and the sum of a and n is equal to 4 with hydrogenchlorosilanes of formula III:R.sub.b H.sub.c SiCl.sub.4-b-c (III)wherein R denotes identical or different alkyl radicals, b is 0, 1, 2 or 3 and c is 1, 2, 3 or 4 and the sum of b and c is equal to or smaller than 4, in the presence of a catalyst saturated with a hydrogen halide.
摘要:
3-Halo- and pseudohalo-alkylsilane esters are prepared by reacting an allyl X compound or a compound containing an allyl X structure with a hydridosilane ester in the presence of an iridium catalyst prepared under specific conditions and/or the reaction medium containing a 0.01-100 mol % excess of the allyl X compound or compound containing the allyl X unit relative to the amount of hydridosilane ester reactant.
摘要:
Hydrogenalkoxysilanes are prepared by direct reaction of finely divided metallic silicon with alcohols in the presence of copper-containing catalysts in a heat-transfer oil comprising tritoluenes, tetratoluenes or mixtures thereof at from 100.degree. to 350.degree. C.
摘要:
Aminopropylalkoxysilanes of formula (I):R.sup.2 R.sup.3 NCH.sub.2 CHR.sup.4 CH.sub.2 Si(OR).sub.3-n (R.sup.1).sub.n(I)are prepared by reacting hydrogensilanes of formula (II):HSi(OR).sub.3n (R.sup.1).sub.n (II)with an amine of formula (III):R.sup.2 R.sup.3 NCH.sub.2 CR.sup.4 .dbd.CH.sub.2 (III),where R and R.sup.1 are alkyl radicals having from 1 to 8 carbon atoms and n is equal to 0, 1 or 2 andR.sup.2 and R.sup.3 are hydrogen, alkyl radicals having from 1 to 8 carbon atoms, .omega.-alkenyl radicals having from 3 to 8 carbon atoms or combinations thereof, andR.sup.4 is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, in the presence of a shaped polymeric rhodium complex catalyst containing organosiloxanemonophenylphosphine ligands.
摘要:
The invention relates to water-based organopolysiloxane containing compositions which are essentially free from organic solvents, have a flash point above 70.degree. C. and essentially liberate no alcohols by hydrolysis on dilution with water. The organopolysiloxane-containing compositions according to the invention are obtainable by mixing M mol of water-insoluble organotrialkoxysilanes with Q mol of water-soluble aminoalkylalkoxysilanes in a molar ratio of 0
摘要:
Cyclic silane esters and solvolysis products thereof and processes for making these materials. The cyclic silanes and their solvolysis products are useful as adhesives, crosslinking agents and reagents for modifying polymers containing ester groups.
摘要:
An apparatus for continuously preparing substantially halogen-free, in particular chlorine-free, trialkoxysilanes of the general formula I (RO)3SiH (I) in which R is an alkyl group having from 1 to 6 carbon atoms, has a main reactor unit (1), at least one metering unit (2, 3, 4) for liquids and/or suspensions, located upstream of the main reactor, and at least one metering unit (5) for gaseous and/or vaporous substances, and also a product workup unit (6) located downstream of the main reactor. A process for preparing substantially halogen-free trialkoxysilanes of the general formula I in which silicon is reacted with alcohols in an inert solvent utilizes at least one organocopper compound catalyst.
摘要:
Organocarbonoyloxysilanes are prepared by reacting an organochlorosilane with a carboxylic acid in a first step which liberates HCl, removing the HCl which is formed, reacting the reaction mixture from the first step with a carboxylic acid anhydride in a second reaction step, the first and/or second reaction steps being conducted in the presence of a catalyst, and isolating the resulting organocarbonoyloxysilane product from the reaction mixture.
摘要:
The present invention relates to a process for preparing low-chloride or chloride-free aminofunctional organosilanes by reacting chlorofunctional organosilanes with organic amines or ammonia and separating off the organic hydrochlorides or ammonium chloride thus formed, wherein further amounts of organic hydrochlorides or ammonium chloride present are reacted by addition of metal alkoxides dissolved in alcohols and the metal chlorides formed are separated off, and also to aminofunctional organosilanes prepared thereby.