A process for preparing a 2-(1,2,2-trimethyl-3-cyclopentenyl)-2-oxoethyl carboxylate compound of the following general formula (6), wherein R represents a monovalent hydrocarbon group having 1 to 9 carbon atoms, the process comprising esterifying a 2-(1,2,2-trimethyl-3-cyclopentenyl)-2-oxoethyl compound of the following general formula (5), wherein X represents a hydroxyl group or a halogen atom, to form the 2-(1,2,2-trimethyl-3-cyclopentenyl)-2-oxoethyl carboxylate compound (6).

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A method for producing tetraalkoxysilane includes reacting a compound represented by Chemical Formula 1 below with an alkali metal at a molar ratio ranging from 1.0:1.0 to 1.0:1.1 and in the absence of a solvent to produce a basic catalyst represented by Chemical Formula 2 below; and mixing the basic catalyst represented by Chemical Formula 2, silicon metal, and an alcohol represented by Chemical Formula 3 below to produce tetraalkoxysilane: Chemical Formula 1
R.sub.1O(CHR.sub.2CH.sub.2O).sub.n—H, Chemical Formula 2
R.sub.1O(CHR.sub.2CH.sub.2O).sub.n-M, and Chemical Formula 3
R.sub.3OH, where M is alkali metal, R.sub.1 represents a C1-C5 linear hydrocarbon group or a C3-C5 branched hydrocarbon group, R.sub.2 represents H or a C1-C3 linear hydrocarbon group, R.sub.3 represents a C1-C2 alkyl group, and n is an integer of 2-3. Thus, it is possible to increase the proportion of the catalyst in the process, and to minimize production of impurities caused by solvent decomposition.

A method of forming a particle includes, in a disperse phase within an aqueous suspension, polymerizing a plurality of mer units of a hydrophilic monomer having a hydrophobic protection group, thereby forming a polymeric particle including a plurality of the hydrophobic protection groups. The method further includes converting the polymeric particle to a hydrophilic particle.

What are presented and described are a curing agent for silicone rubber compounds comprising a compound having the general structural formula R.sup.1.sub.mSi(R).sub.4-m, a process for preparation thereof and the use of this curing agent for hardening a silicone rubber compound. The invention further relates to a composition comprising the curing agent for silicone rubber compounds and to the use of such a composition as sealant, adhesive or coating composition.

Metal-organic framework (MOFs) compositions based on postsynthetic metalation of secondary building unit (SBU) terminal or bridging OH or OH.sub.2 groups with metal precursors or other post-synthetic manipulations are described. The MOFs provide a versatile family of recyclable and reusable single-site solid catalysts for catalyzing a variety of asymmetric organic transformations, including the regioselective boryiation and siiylation of benzyiic CH bonds, the hydrogenation of aikenes, imines, carbonyls, nitroarenes, and heterocycles, hydroboration, hydrophosphination, and cyclization reactions. The solid catalysts can also be integrated into a flow reactor or a supercritical fluid reactor.

Provided is a production method for producing an aromatic alkoxysilane containing a hexafluoropropanol group (C(CF.sub.3).sub.2OH; referred to as HFIP group) from an inexpensive starting raw material with a high reaction conversion rate and selectivity. As shown in the following scheme, the production method includes: a first step of reacting an aromatic halosilane with hexafluoroacetone in the presence of a Lewis acid catalyst, thereby obtaining a HFIP group-containing aromatic halosilane; and a second step of forming the HFIP group-containing aromatic alkoxysilane by reacting the HFIP group-containing aromatic halosilane with an alcohol.

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This organopolysiloxane composition, when cured at room temperature by moisture in the atmosphere, provides a silicone rubber cured product having good self-adhesiveness to a magnesium alloy. The organopolysiloxane composition contains (A) an organopolysiloxane having a hydroxy group and/or a hydrolysable silyl group at both ends of the molecular chain, (B) an organic silicon compound other than (A) and (C), having at least three hydrolysable groups bonded to a silicon atom per molecule, and/or a partial hydrolysis-condensation product thereof, and (C) a silane coupling agent having a specific molecular structure having a carboxylic acid silyl ester bond. Furthermore, a novel compound, having an alkoxysilyl group and a carboxylic acid silyl ester group per molecule, can have improved adhesiveness/bonding properties with respect to a base material due to the effect of carboxylic acid after hydrolysis thereof.

A method of preparing an alkoxy-functional organosilicon compound is provided. The method comprises reacting (A) an initial organosilicon compound and (B) an alcohol component in the presence of (C) a catalyst, thereby preparing the alkoxy-functional organosilicon compound. The initial organosilicon compound (A) comprises at least one alkoxysilyl group. The alcohol component (B) comprises an organic alcohol. The catalyst (C) comprises (C1) an ammonium carboxylate compound or (C2) a titanate compound. A reaction product comprising an alkoxy-functional organosilicon compound prepared in accordance with the method, and a composition comprising the reaction product, are also provided. The alkoxy-functional organosilicon compound, and the reaction product and composition comprising the same, are prepared in increased purity under functional group-tolerant conditions.

The present invention provides: a room temperature curable organopolysiloxane composition which has curability equivalent to the curability of conventional dealcoholization type or deoximation type room temperature curable organopolysiloxane compositions even if various catalysts are used therefor, while reducing harmful effects on human bodies and burden on the environment, and which enables the achievement of a cured product that has good rubber properties, adhesiveness and durability if cured; various articles which comprise this composition or a cured product that is obtained by curing this composition; a novel hydrolyzable organosilane compound which is useful as a curing agent for this composition; and a method for producing this novel hydrolyzable organosilane compound. A room temperature curable organopolysiloxane composition which contains, as a curing agent, a hydrolyzable organosilane compound that is represented by general formula (2) and releases/discharges a cyclic ketone compound as a leaving group and/or a partial hydrolysis-condensation product of the hydrolyzable organosilane compound.

##STR00001##

(In the formula, R.sup.2 represents a monovalent hydrocarbon group having from 1 to 10 carbon atoms; n represents a number from 1 to 8; and m represents 3 or 4.)

The present disclosure discloses an arylaminosilane compound, a propylene polymerization catalyst and preparation thereof. The arylaminosilane compound has a structure of

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wherein R.sub.1 is a C.sub.1-C.sub.8 alkyl group or a C.sub.1-C.sub.8 silanyl group; R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each independently H or a C.sub.1-C.sub.12 alkyl group; R.sub.7, R.sub.8 and R.sub.9 are each independently a C.sub.1-C.sub.8 alkyl group or a C.sub.1-C.sub.8 alkoxy group. When the arylaminosilane compound is used as an external electron donor of a propylene polymerization catalyst in propylene polymerization reaction, the catalyst has good hydrogen response.