- Process for Production of Alkyl Tin Alkoxide Compound, and Process for Production of Carbonic Acid Ester Using the Compound
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The present invention provides a process for producing: a compound represented by XOR2; a dialkyl tin dialkoxide compound having one tin atom, two Sn—R1 bonds and two Sn—OR2 bonds; and/or a tetraalkyl dialkoxy distannoxane compound having one Sn—O—Sn bond, in which each tin atom of the tetraalkyl dialkoxy distannoxane compound has two Sn—R1 bonds and one Sn—OR2 bond, the process comprising reacting in the absence of a catalyst at least one alkyl tin compound selected from the group consisting of i) and ii) below: i) a dialkyl tin compound having one tin atom, two Sn—R1 (wherein R1 represents an alkyl group) bonds, and two Sn—OX bonds (wherein OX is a group in which HOX that is a conjugate acid of OX is a Bronsted acid having a pKa of from 0 to 6.8); andii) a tetraalkyl distannoxane compound having one Sn—O—Sn bond, in which each tin atom of the tetraalkyl distannoxane compound has two Sn—R1 bonds and one Sn—OX bond (wherein OX is a group in which HOX that is a conjugate acid of OX is a Bronsted acid having a pKa of from 0 to 6.8); anda carbonic acid ester represented by R2OCOOR2 (wherein R2 represents a linear or branched, saturated or unsaturated hydrocarbon group, a hydrocarbon group having a saturated or unsaturated cyclic hydrocarbon substituent, or a Y—CH2— group (wherein Y represents an alkyl polyalkylene group, an aromatic group or a cyclic saturated or unsaturated alkylene ether group)), and/oran alcohol represented by R2OH (wherein R2 is the same as defined above).
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(2010/12/18)
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- Process for the fractional production of organotin compounds
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A process for the fractional production of mono-, di- or triorganotin oxides which comprises subjecting an organotin halide to hydrolysis, separating the hydrolysis reaction mixture into three layers, and thereby obtaining the desired organotin oxide-containing layer as a triorganotin oxide--containing layer substantially free of mono- and/or diorganotin oxide, a monoorganotin oxide-containing aqueous layer, or a diorganotin oxide-containing layer substantially free of mono- and/or triorganotin oxide, and then recovering the tri-, mono- or diorganotin oxides from the desired organotin oxide-containing layers.
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- Urethane prepolymer
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A polyurethane prepolymer composition comprising (1) not less than 0.65 by weight of the idealized adduct from trimethylolpropane with 3 moles of 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate and (2) not more than 0.05 by weight of 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate relative to the whole composition is very suitable for an isocyanate component of a two-package urethane coating and gives a coating film having excellent gloss, weathering resistance, adhesivity and impact resistance.
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- Novel diorganotin maleate half esters and process for preparing same
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Organotin compounds with low tin content suitable as stabilizers for halogen containing resins e.g. polyvinyl chloride are of formula EQU1 where R1 and R2 are C1-20 alkyl, cycloalkyl or phenyl groups, Q1 represents a radical selected from the group consisting of EQU2 Q2 is a hydrogen atom, an alkyl group containing between 1 and 6 carbon atoms or the group --CH2 Z3. Z1, z2, and Z3 are individually selected from the group of groups consisting of EQU3 and EQU4 R3 is an alkyl group containing between 1 and 20 carbon atoms, a substituted or unsubstituted phenyl group or a substituted or unsubstituted alkylphenyl group. R4 is an alkyl grup containing between 1 and 20 carbon atoms, a substituted phenylakly or unsubstituted phenylalkyl group wherein the alkyl portion of the radical contains between 1 and 6 carbon atoms. R5 is an alkyl group containing between 1 and 20 carbon atoms, a substituted phenyl, unsubstituted phenyl, substituted alkylphenyl or unsubstituted alkylphenyl group. R6 represents a single bond, an alkylene group containing between 1 and 20 carbon atoms, an alkenylene group containing between 2 and 20 carbon atoms, a substituted phenylene or an unsubstituted phenylene group. R7 represents a single bond, an alkylene group containing between 1 and 20 carbon atoms, an alkenylene group containing between 2 and 20 carbon atoms, a substituted phenylene group or an unsubstituted phenylene group. R8 represents an alkylene group containing between 1 and 20 carbon atoms, said alkylene group being either unsubstituted or containing at least one phenyl group as a substituent, an alkenylene group containing between 2 and 20 carbon atoms or a cycloalkylene group containing between 5 and 6 carbon atoms. R9 represents an alkylene group containing between 1 and 20 carbon atoms. n is an integer between 1 and 6 inclusive. Y is of the formula EQU5 --SR4, EQU6 or Y and the aforementioned group EQU7 together constitute a divalent group radical of the formula EQU8 wherein both free valences of said divalent group are bonded to the same tin atom.
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