摘要:
At least one (poly)thio alkoxy and/or halosilane is/are prepared by reaction of at least one sulfur-containing reagent with at least one alkoxy and/or halosilane, wherein an ionic addition of a sulfur-containing reagent to an alkoxy and/or halosilane is preferably conducted with thermal and/or actinic activation; the novel polythio alkoxy and/or halosilanes of formula (III.2) thus prepared are particularly useful as coupling agents in elastomeric compositions containing a white filler of the silica type and having the formula (III.2) wherein, for example, R1.1 and R1.3=methyl and R1.2=ethoxy.
摘要:
At least one (poly)thio alkoxy and/or halosilane is/are prepared by reaction of at least one sulfur-containing reagent with at least one alkoxy and/or halosilane, wherein an ionic addition of a sulfur-containing reagent to an alkoxy and/or halosilane is preferably conducted with thermal and/or actinic activation; the novel polythio alkoxy and/or halosilanes of formula (III.2) thus prepared are particularly useful as coupling agents in elastomeric compositions containing a white filler of the silica type and having the formula (III.2) wherein, for example, R1.1 and R1.3=methyl and R1.2=ethoxy.
摘要:
Functionalized organomonoalkoxy (or monohydroxy) silanes, in particular alkenyl (allyl) functionalized silanes, are useful as intermediates in organic synthesis, and are prepared by reacting dialkyldialkoxysilanes with an organic halide compound (allyl halide) (III) in an ether solvent (SI), such compound (III) being suited to substitute the alkoxy groups by functionalized groups, for example alkenyl groups.
摘要:
At least one polythio alkoxy and/or halosilane is/are prepared by reacting at least one sulfur-containing reagent (Rs) with at least one alkoxy and/or halosilane; intermediates therefor include the thio alkoxy and/or halosilanes of formula (CH3CH2O)(Me)2Si—(CH2)3—S—CO—(CH2)5—CH3.
摘要:
A process for preparing dicarboxylic acids is described. More particularly a process is described for preparing adipic acid (1,6-hexanedioic acid), by the action of nitric acid, starting from cyclic ketones or alcohols which are the corresponding compounds from the standpoint of the number of carbon atoms, in the presence of one or more oxides of nitrogen at a molar concentration in the reaction mixture of greater than 2.5 mmol per kg of reaction mixture.
摘要:
A method for processing a CO2-containing gas in order to reduce the carbon dioxide content thereof, includes contacting the gas with a compound of at least one rare earth element, whereby the carbon dioxide is adsorbed onto the compound and a carbon dioxide-depleted gas is thus obtained; such compound is more particularly an oxide, and the rare earth element is particularly selected from among cerium, lanthanum or praseodymium.
摘要:
The invention concerns a cosmetic composition comprising a specific functionalized organopolysiloxane which is linear or cyclic. Said functionalized organopolysiloxane is used as emollient and/or carrier and/or anti-transfer agent in cosmetic compositions.
摘要:
Chemicaly stable, perflourinated, linear or cyclic polyorganosiloxanes (POS), and a process for the preparation thereof. Antifoams, agents for lowering surface tension, dirt repellents, antiadhesives, lubricants, oleophobic and/or hydrophobic agents, coatings and other compositions containing the perfluorinated POS are disclosed.
摘要:
A method for processing a CO2-containing gas in order to reduce the carbon dioxide content thereof, includes contacting the gas with a compound of at least one rare earth element, whereby the carbon dioxide is adsorbed onto the compound and a carbon dioxide-depleted gas is thus obtained; such compound is more particularly an oxide, and the rare earth element is particularly selected from among cerium, lanthanum or praseodymium.
摘要:
The present invention relates to a process for preparing functionalized polyorganosiloxane (POS) resins comprising units M: (R3SiO1/2), Q: (SiO4/2) and M′: (YaR3-aSiO1/2) and optionally D: (R2SiO2/2) and/or D′: (RYSiO2/2) and T: (RSiO3/2) and/or T′: (YSiO3/2), with, in these units: R=C1-C10 alkyl or a C8-C12 aryl and Y a functional group (e.g.: Si—H),by redistribution of POS resins using POSf bearing functional units M′ and/or D′ and/or in the presence of an acid catalyst of the trifluoromethane-sulfonimide (TFSI) type.The present invention also relates to the aforementioned catalyst system.
摘要翻译:本发明涉及一种制备官能化聚有机硅氧烷(POS)树脂的方法,其包括单元M:(R 3 SiO 1/2),Q:(SiO 4) / 2)和M':(Y a a R 3-a SiO 1/2)和任选的D:(R 和/或D':(RYSiO 2/2/2)和T:(RSiO 3/2/2) 和/或T':(YSiO 3/2/2),在这些单元中:R = C 1 -C 10 - 通过使用POSf承载官能单元M'将POS树脂重新分配,通过重新分配POS树脂,以及Y为官能团(例如:Si-H) 和/或D'和/或在三氟甲烷 - 磺酰亚胺(TFSI)型的酸催化剂存在下进行。 本发明还涉及上述催化剂体系。