- ORGANOSILICON COMPOUND AND ITS PRODUCTION METHOD, COMPOUNDING AGENT FOR RUBBER, RUBBER COMPOSITION, AND TIRE
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A method for producing a sulfur-containing organosilicon compound capable of dramatically reducing hysteresis loss of the cured rubber composition and improving abrasion resistance and its production method are provided. A compounding agent for rubber containing the sulfur-containing organosilicon compound, a rubber composition prepared by blending such compounding agent for rubber, and a tire produced by using the cured rubber composition are also provided. The sulfur-containing organosilicon compound has a hydrolyzable silyl group, amino group, and mercapto group.
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- Cleavage of cyclic organosilanes in the preparation of aminofunctional organoalkoxysilanes
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An aminofunctional organoalkoxysilane of formula I R2N—(CH2)y—Si(OR1)3?nR2n ??(I), wherein the R groups bonded to nitrogen are identical or different and each individual R group is hydrogen, an alkyl radical having from 1 to 4 carbon atoms, an aryl radical or an arylalkyl radical, R1 is an alkyl radical having from 1 to 8 carbon atoms or an aryl radical, R2 is an alkyl radical having from 1 to 8 carbon atoms or an aryl radical, y is 2, 3 or 4 and n is 0, 1 or 2, is prepared by a process comprising: reacting a chlorofunctional organoalkoxysilane of formula II Cl—(CH2)y—Si(OR1)3?nR2n ??(II), wherein R1, R2, y and n are as defined above, with ammonia or an organic amine of formula III HNR2 ??(III), wherein the two R groups are identical or different and each is defined as described above; separating organic amine hydrochloride or ammonium chloride by-product which is formed in the reaction; distilling the resulting crude product, thereby preparing an aminofunctional organoalkoxysilane or the product fraction of an aminofunctional organoalkoxysilane; and treating the aminofunctional organoalkoxysilane or the product fraction of an aminofunctional organoalkoxysilane with an alcohol.
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- Platinum oxide (PtO2): A potent hydrosilylation catalyst
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(matrix presented) Platinum oxide was found to be a versatile and powerful hydrosilylation catalyst upon a wide variety of functionalized alkenes and especially aminated alkenes. Moreover, highly reproducible results and easy removal make this new catalys
- Sabourault, Nicolas,Mignani, Gerard,Wagner, Alain,Mioskowski, Charles
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p. 2117 - 2119
(2007/10/03)
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- Diamino compounds and their production method
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The present invention is to provide diamino compounds useful to polyamide raw materials for production of liquid crystal alignment layers having excellent voltage holding ratios without development of image-sticking phenomena, a method for producing the compounds and liquid crystal display devices equipping the liquid crystal alignment layers. The Diamino compounds are represented by the general formula (1): STR1 wherein R indicates hydrogen or an alkyl group having 1 to 8 carbon atoms, further, X, Y and Z indicate hydrogen, an alkyl group having 1 to 3 carbon atoms or fluorine, respectively, and a part or all of them may be the same or different, and the positions of these substitutive groups may be ortho positions or meta positions.
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- Process for making a silylisocyanurate
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This invention provides a process for making a silylorganocarbamate or a silylisocyanurate which process comprises reacting an aminosilane with a dialkyl carbonate, diaryl carbonate or a mixture thereof in the presence of a basic catalyst to obtain the silylorganocarbamate; optionally, neutralizing the basic catalyst and residual aminosilane with a neutralizing agent; and adding a cracking catalyst and heating at subatmospheric pressure to obtain the silylisocyanurate; or heating a silylorganocarbamate at a temperature sufficient for dissociation of the carbamate at subatmospheric pressure in the presence of a cracking catalyst and a timerization catalyst to obtain a silylisocyanurate.
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- Silicone reaction products and glycol compositions containing the products
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The reaction product of phosphorous acid, formaldehyde, and monomeric or polymeric alkoxysilanes having one or more aminoalkylene groups are useful as gelation inhibitors for aqueous glycol solutions.
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- Organosilane esters having glycol ether moieties
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The present invention relates to new organosilane esters which can be characterized by the formula Y-(CH2)n Si(CH3)p -Xm Z3-(m+p). In this formula, Y represents either a substituted or unsubstituted amino group, or it represents the mercapto moiety or the moiety STR1 X represents an alkoxy group with 1 to 4 carbon atoms and Z a glycol ether moiety. The index n can assume the numerical values from 1 to 3, m can be 0 or 1 and p can be 0 or 1 or 2, on the condition that m+p is equal to or less than 2. The new silanes yield very stable hydrolyzates and have good adhesion-improving properties. They are therefore particularly well suited for use in sealing compositions.
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- Preparation of aminoalkylsilanes
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In the preparation of an aminoalkylsilane of the formula wherein n is an integer from 0 to 3, R is an alkyl or alkoxyalkyl radical with 1 to 8 C atoms in each alkyl radical, or an aryl radical with up to 10 C atoms, R1 is an alkyl radical with up to 8 C atoms or an aryl radical with up to 10 C atoms, and R2 is a divalent hydrocarbon radical with 2 to 10 C atoms, By reacting the corresponding halogenoalkylsilane with excess ammonia at a temperature above about 80° C, and working up the reaction mixture, the improvement which comprises adding a metal alcoholate to the reaction mixture obtained from the amination before the mixture is worked up. The alcoholate may be added in an amount equivalent to the halogenoalkylsilane initially employed or to the halide content of the filtrate after amination but before working up, as by distillation.
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- Azido-silane compositions
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Azido-containing silane compositions of matter useful as coupling agents in the production of polymer composite articles.
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- Azido-silane compositions
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Azido-containing silane compositions of matter useful as coupling agents in the production of polymer composite articles.
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