EP0544257A2
Expired / Lapsed
EP
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Triorganosiloxydiphenylsilanols and method for preparing same
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1992-11-25
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Granted: —
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Expires: 2012-11-25
Abstract
Abstract The triorganosiloxydiphenylsilanols of the present invention are a novel silicone compound that is useful as a plasticizer for silicone rubbers. The present invention also relates to a method for preparing these compounds in high yield and purity and a method for preparing filled curable organosiloxane compositions using the present compounds as plasticizers.
Inventors
- 👤 Tadashi c/o Toray Dow Corning Okawa
- 👤 Shuji c/o Toray Dow Corning Yamada
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:47
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0836; C08; C08K; C08K5/00; C08K5/54; C08K5/541; C08K5/5415; C08K5/5419
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
29 words
A triorganosiloxydiphenylsilanol of the general formula where C₆H₅ designates the phenyl radical and each R is individually selected from the group consisting of substituted and unsubstituted monovalent hydrocarbon radicals.
Claim 2
Independent Claim
79 words
A method for preparing a triorganosiloxydiphenylsilanol of the general formula where C₆H₅ designates the phenyl radical and each R is individually selected from the group consisting of substituted and unsubstituted monovalent hydrocarbon radicals, said method comprising the sequential steps of 1) reacting a triorganosilanol of the general formula R₃SiOH with a diphenyldihalosilane of the general formula (C₆H₅)₂SiX₂ to yield a triorganosiloxydiphenylhalosilane of the general formula 2) hydrolyzing said triorganosiloxydiphenylhalosilane, and 3) isolating the resultant triorganosiloxydiphenylsilanol from the reaction mixture.
Claim 3
Dependent Claim
76 words
In a method for preparing a filled organosiloxane composition by blending a curable polyorganosiloxane with an inorganic filler in the presence of a plasticizer selected from the group consisting of organosilicon compounds containing at least one silanol group per molecule, the improvement comprising selecting said plasticizer from among triorganosiloxydiphenyl-silanols of the general formula where C₆H₅ designates the phenyl radical and each R is individually selected from the group consisting of substituted and unsubstituted monovalent hydrocarbon radicals.
Claim 4
Dependent Claim
27 words
A method according to claim 3 where the concentration of said plasticizer is from 0.05 to 20 weight parts per 100 weight parts of said curable polyorganosiloxane.
Claim 5
Dependent Claim
21 words
A method according to claim 4 where said composition includes an amount of a curing agent sufficient to cure said polyorganosiloxane.
References Cited (Backward Citations)
No citation records indexed.
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