Process for production of polyorganosiloxane
First Claim
1. A process for producing a polyorganosiloxane, which comprises adding an organochlorosilane represented by the following formula (1):
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space="preserve" listing-type="equation">R.sup.1 --Si(Cl).sub.3 (
1)wherein R1 is a C2-30 straight chain saturated or unsaturated hydrocarbon group, a C3-30 branched chain saturated or unsaturated hydrocarbon group, a phenyl group, a cyclohexyl group, a C3-15 halogenated hydrocarbon group, an acryloxypropyl group or a methacryloxypropyl group, to a uniform mixture comprising water and at least one kind of C1-3 straight chain or branched alcohol, to subject the organochlorosilane to a hydrolysis and condensation reaction, wherein the amount of the alcohol in the uniform mixture is 1-30 times (by volume) the amount of organochlorosilane, and the amount of water in the uniform mixture comprising water and an alcohol is 1-30 times the stoichiometric amount of water needed for hydrolysis of the total --Cl groups in organotrichlorosilane.
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Abstract
The present invention discloses a process for producing a polyorganosiloxane, which comprises adding an organochlorosilane to a uniform mixture comprising water and at least one kind of alcohol, to subject the organochlorosilane to a hydrolysis and condensation reaction. The organochlorosilane is preferably one represented by the following formula (1):
R.sup.1 --Si(Cl).sub.3 (1)
wherein R1 is a C1-30 straight chain saturated or unsaturated hydrocarbon group, a C1-30 branched chain saturated or unsaturated hydrocarbon group, a phenyl group, a cyclohexyl group, a C3-15 halogenated hydrocarbon group, an acryloxypropyl group or a methacryloxypropyl group.
15 Citations
5 Claims
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1. A process for producing a polyorganosiloxane, which comprises adding an organochlorosilane represented by the following formula (1):
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space="preserve" listing-type="equation">R.sup.1 --Si(Cl).sub.3 (
1)wherein R1 is a C2-30 straight chain saturated or unsaturated hydrocarbon group, a C3-30 branched chain saturated or unsaturated hydrocarbon group, a phenyl group, a cyclohexyl group, a C3-15 halogenated hydrocarbon group, an acryloxypropyl group or a methacryloxypropyl group, to a uniform mixture comprising water and at least one kind of C1-3 straight chain or branched alcohol, to subject the organochlorosilane to a hydrolysis and condensation reaction, wherein the amount of the alcohol in the uniform mixture is 1-30 times (by volume) the amount of organochlorosilane, and the amount of water in the uniform mixture comprising water and an alcohol is 1-30 times the stoichiometric amount of water needed for hydrolysis of the total --Cl groups in organotrichlorosilane. - View Dependent Claims (2, 3)
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4. A process for producing a polyorganosiloxane, which comprises adding methyltrichlorosilane at a temperature ranging from -30 to 35°
- C. to a uniform mixture comprising water and a C1-3 straight chain or branched chain alcohol, the amount of water in the mixture being 1-3 times the stoichiometric amount of water needed for complete hydrolysis of the three --Cl groups bonding to the silicon atom of methyltrichlorosilane and the amount of the alcohol in the mixture being 1-30 times the volume of methyltrichlorosilane, to subject the methyltrichlorosilane to a hydrolysis and condensation reaction.
- View Dependent Claims (5)
Specification