EP0614959A1
Expired / Lapsed
EP
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Solventless silicone composition
Assignee: General Electric Co
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Filing: 1994-02-28
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Granted: —
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Expires: 2014-02-28
Abstract
Abstract A method is provided for making a heat curable organopolysiloxane composition, such as a pressure sensitive adhesive composition by blending a benzene soluble resinous copolymer in the form of a spray dried particulate, comprising triorganosiloxy units, such as trimethylsiloxy units, and SiO₂ units with a fluid network mixture of an alkenyl siloxane, a silicon hydride siloxane and a hydrosilylation catalyst.
Inventors
- 👤 Jeffrey Hayward Wengrovius
- 👤 Timothy Brydon Burnell
- 👤 Peter Martin Miranda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 23:15
CPC Classifications
C; C08; C08L; C08L83/00; C08L83/04; C09; C09J; C09J183/00; C09J183/04; C09J7/00; C09J7/30; C09J7/38; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/20
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
114 words
A method for making a substantially solventless heat curable organopolysiloxane composition, comprising blending by weight, 100 parts of a spray dried organosiloxane hydrolyzate comprising chemically combined triorganosiloxane units and tetrasiloxy units having an organo to silicon ratio of about 0.5 to about 1.5, and 50 to 500 parts of a network mixture comprising a substantially linear alkenyl siloxane, a substantially linear silicon hydride siloxane and an amount of a hydrosilylation catalyst which is effective as a network curing catalyst, where the ratio of silicon atoms attached to hydrogen or "SiH", to silicon atoms attached to alkenyl groups or "Si alkenyl" in the network mixture has a value of from about 0.8 to about 2.
Claim 2
Dependent Claim
22 words
A heat curable organopolysiloxane composition made in accordance with the method of claim 1, in the form of a pressure sensitive adhesive.
Claim 3
Dependent Claim
21 words
A heat curable organopolysiloxane composition made in accordance with the method of claim 1, in the form of a potting composition.
Claim 4
Dependent Claim
22 words
A heat curable organopolysiloxane composition made in accordance with the method of claim 1, in the form of a vibration damping composition.
Claim 5
Dependent Claim
32 words
A heat curable organopolysiloxane composition made in accordance with the method of claim 1, where the alkenyl siloxane is a vinyl siloxane fluid consisting essentially of dimethylsiloxy units and terminal dimethylvinylsiloxy units.
Claim 6
Dependent Claim
26 words
A method in accordance with claim 1, where the hydride siloxane is a polydimethylsiloxane fluid consisting essentially of condensed dimethylsiloxy units and having terminal dimethylhydrogensiloxy units.
Claim 7
Dependent Claim
15 words
A method in accordance with claim 1, where the hydrosilylation catalyst is a platinum catalyst.
Claim 8
Dependent Claim
16 words
A method in accordance with claim 7, where the platinum catalyst is used with an inhibitor.
Claim 9
Dependent Claim
25 words
A method in accordance with claim 1, where the network mixture contains a silicone cross-linker having greater than 2 reactive SiH or Si alkenyl groups.
Claim 10
Dependent Claim
14 words
A heat curable organopolysiloxane composition made in accordance with the method of claim 1.
References Cited (Backward Citations)
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