EP0458355A2
Expired / Lapsed
EP
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Organohydrogenpolysiloxanes and curable organosiloxane compositions containing same
Assignee: DuPont Toray Specialty Materials KK
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Filing: 1991-05-24
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Granted: —
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Expires: 2011-05-24
Abstract
Abstract This invention provides a novel class of oganohydrogenpolysiloxanes that function as curing agents for organosiloxane compositions curable by a hydrosilylation reaction in addition to imparting excellent adhesion to the cured composition. This invention also provides curable organosiloxane compositions containing these novel organohydrogenpolysiloxanes. The compositions exhibit excellent adhesion to a variety of organic and inorganic substrates, including but not limited to metals, glasses, and plastics.
Inventors
- 👤 Atsushi Togashi
- 👤 Akira Kasuya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 03:18
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08G77/50; C08G77/04; C08G77/485; C08L; C08L83/00; C08L83/04; C08G77/12; C08G77/14; C08G77/20; C08G77/22; C08G77/24; C08G77/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
An organohydrogenpolysiloxane containing a linear sequence of at least five silicon atoms, and containing in each molecule at least three silicon-bonded hydrogen atoms, at least one epoxy-containing group and at least one trialkoxysilyl alkyl group, where said epoxy-containing group and said trialkoxysilylalkyl group are bonded to different silicon atoms through at least two carbon atoms and where the organic groups bonded to silicon are monovalent hydrocarbon or halogenated hydrocarbon radicals.
Claim 2
Dependent Claim
30 words
An organohydrogenpolysiloxane according to claim 1 where at least 50 percent of said organic groups are methyl and any remainder are selected from the group consisting of phenyl and 3,3,3-trifluoropropyl.
Claim 3
Dependent Claim
115 words
An organohydrogenpolysiloxane according to claim 2 which is selected from the group consisting of where m and p are integers with values of at least 1, n is zero or an integer with a value of at least 1, and q is an integer with a value of at least 3; where r and u are integers with values of at least 1, s is zero or an integer with a value of at least 1, and t is an integer with a value of at least 3; and wherein v is zero or an integer with a value of at least 1 and w is an integer with a value of at least 3.
Claim 4
Dependent Claim
121 words
In a curable organosiloxane composition comprising A) an organopolysiloxane containing at least 2 silicon-bonded alkenyl radicals in each molecule and exhibiting the average unit formula R a SiO (4 - a)/2 where R represents a monovalent hydrocarbon or halogenated hydrocarbon radical and the value of a is from 1.0 to 2.3, B) an organohydrogenpolysiloxane containing a linear sequence of at least 5 siloxane units as the primary molecular structure and at least three silicon-bonded hydrogen atoms, and C) a hydrosilylation-reaction catalyst, the improvement comprising the presence in said organohydrogen-polysiloxane of at least one trialkoxysilylalkyl group, and at least 1 epoxy group-containing organic group, where said trialkoxysilylalkyl and epoxy-containing groups are bonded to different silicon atoms through at least two carbon atoms.
Claim 5
Dependent Claim
146 words
A composition according to Claim 4 wherein said alkenyl radical is vinyl and the remaining radicals represented by R are selected from the group consisting of methyl, phenyl and 3,3,3-trifluoropropyl, said hydrosilylation-reaction catalyst is a platinum-containing compound or complex, and the organohydrogenpolysiloxane is selected from the group consisting of where m and p are integers with values of at least 1, n is zero or an integer with a value of at least 1, and q is an integer with a value of at least 3, r and u are integers with values of at least 1, s is zero or an integer with a value of at least 1, t is an integer with a value of at least 3, v is zero or an integer with a value of at least 1 and w is an integer with a value of at least 3.
Claim 6
Dependent Claim
57 words
A composition according to claim 4 where said hydrosilylation reaction catalyst is in the form of a microparticulate thermoplastic resin containing at least 0.01 weight% of said catalyst, and wherein the thermoplastic resin has a softening point of 50 to 200°C. and the average particle diameter of the microparticulate thermoplastic resin is from 0.01 to 100 micrometers.
Claim 7
Dependent Claim
14 words
A composition according to claim 6 where said thermoplastic resin is a silicone resin.
References Cited (Backward Citations)
No citation records indexed.
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