EP0315836A2
Expired / Lapsed
EP
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Polyorganosiloxane based interpenetrating network polymers and methods of making
Assignee: Huels America Inc (a Delaware Corporation)
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Filing: 1988-10-28
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Granted: —
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Expires: 2008-10-28
Abstract
Abstract Cross-linked polyorganosiloxane networks are prepared by dispersing vinylsiloxane and silicon hydride components in a liquid monomer, cross-linking the siloxane components by hydrosilylation, and polymerizing of the organic monomer. Poly-penetrating network systems may be prepared by cross-linking one or more organic polymers in the presence of the polyorganosiloxane network. At least one of the organic polymers is a vinyl or vinylidene addition polymer which may be polymerized by free radical polymerization. The interpenetrating polymer network systems may be cast, molded, extruded or formed into films, membranes and coatings. The resulting products have improved mechanical, gas permeability and optical properties compared to conventional silicone elastomers.
Inventors
- 👤 Arne O. Finberg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 23:23
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/42; C08G77/442; C08L; C08L83/00; C08L83/04; C08G77/44; C08G77/70
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
15 words
A composition comprising a relaxed, perturbed, cross-linked polyorganosiloxane network dispersed in a second organic polymer.
Claim 2
Dependent Claim
15 words
A composition comprising a relaxed, perturbed, cross-linked polyorganosiloxane network dispersed in a second organic polymer.
Claim 3
Dependent Claim
21 words
A composition according to Claim 1 wherein said second polymer is not significantly cross-linked, whereby said polyorganosiloxane forms a mono-penetrating network.
Claim 4
Dependent Claim
34 words
A composition according to Claim 1 wherein said second polymer is substantially cross-linked to itself but not significantly cross-linked to said polyorganosiloxane, whereby said polyorganosiloxane and said second polymer form a dual-penetrating polymer network.
Claim 5
Dependent Claim
34 words
A composition according to Claim 3 comprising at least a third polymer which is substantially cross-linked to itself but not significantly cross-linked to said other polymers, whereby said polymers form a poly-penetrating polymer network.
Claim 6
Dependent Claim
14 words
A composition according to Claim 1 wherein said second polymer is an addition polymer.
Claim 7
Dependent Claim
21 words
A composition according to Claim 5 wherein said addition polymer is selected from the group consisting of vinyl and vinylidene polymers.
Claim 8
Dependent Claim
24 words
A composition according to Claim 5 wherein said addition polymer is a glassy polymer having a glass transition temperature of about -120°C to 280°C.
Claim 9
Dependent Claim
21 words
A composition according to Claim 5 wherein said addition polymer is a homo- or copolymer having a melting point above 23°C.
Claim 10
Dependent Claim
15 words
A composition according to Claim 5 wherein said addition polymer is a thermoplastic ionomeric polymer.
Claim 11
Dependent Claim
15 words
A composition according to Claim 1 wherein said polyorganosiloxane is cross-linked by a hydrosilylation reaction.
Claim 12
Dependent Claim
21 words
A composition according to Claim 1 wherein said polyorganosiloxane is present in an amount of about 0.01 to 99.99 weight percent.
Claim 13
Dependent Claim
10 words
A composition according to Claim 1 which is optically clear.
Claim 14
Dependent Claim
9 words
A composition according to Claim 1 which is homogeneous.
Claim 15
Dependent Claim
13 words
A composition according to Claim 1 in the form of a gel coating.
Claim 16
Dependent Claim
13 words
A composition according to Claim 1 in the form of a hydrophilic coating.
Claim 17
Dependent Claim
22 words
A composition according to Claim 1 wherein said polyorganosiloxane is selected from the groups consisting of polydimethylsiloxanes, polydiphenylsiloxanes, polytrimethylsiloxanes, and copolymers thereof.
Claim 18
Dependent Claim
23 words
A composition according to Claim 1 wherein said second polymer is selected from the group consisting of polyacrylates, polymethacrylates, styrenes, vinylpyrrolidones and vinylpyridines.
Claim 19
Independent Claim
58 words
A method of making a cross-linked polyorganosiloxane network dispersed in a second organic polymer comprising dispersing a component having SiH groups and an organosiloxane having vinyl groups in a reactive liquid monomer of said second polymer, cross-linking said component and said organosiloxane by hydrosilylation to form said network in said monomer, and simultaneously or subsequently polymerizing said monomer.
Claim 20
Independent Claim
58 words
A method of making a cross-linked polyorganosiloxane network dispersed in a second organic polymer comprising dispersing a component having SiH groups and an organosiloxane having vinyl groups in a reactive liquid monomer of said second polymer, cross-linking said component and said organosiloxane by hydrosilylation to form said network in said monomer, and simultaneously or subsequently polymerizing said monomer.
Claim 21
Dependent Claim
18 words
A method according to Claim 18 wherein said SiH groups and vinyl groups are on the same organosiloxane.
Claim 22
Dependent Claim
28 words
A method according to Claim 18 wherein said SiH groups are on a low molecular weight to polymeric component and said vinyl groups are on a separate organosiloxane.
Claim 23
Dependent Claim
19 words
A method according to Claim 18 wherein said component, organosiloxane and monomer are dispersed in a non-reactive organic medium.
Claim 24
Dependent Claim
15 words
A method according to Claim 18 wherein said hydrosilylation is catalyzed by a platinum catalyst.
Claim 25
Dependent Claim
26 words
A method according to Claim 18 wherein the polymerization of said monomer is selected from the group consisting of free radical, anionic, cationic and organometallic polymerization.
Claim 26
Dependent Claim
12 words
A method according to Claim 18 wherein said dispersion is substantially homogeneous.
Claim 27
Dependent Claim
21 words
A method according to Claim 18 wherein said polymerized monomer is cross-linked to form a dual-penetrating network with said cross-linked polyorganosiloxane.
Claim 28
Dependent Claim
25 words
A method according to Claim 25 wherein at least a second monomer is polymerized and cross-linked subsequent to said hydrosilylation to form a poly-penetrating network.
Claim 29
Dependent Claim
45 words
A method according to Claim 25 wherein the cross-linking is carried out in a non-reactive solvent and the cross-linking density of each network is controlled to produce a smooth, flowing gel having a viscosity below about 10,000 centistokes at the boiling point of the solvent.
Claim 30
Dependent Claim
41 words
A method according to Claim 18 wherein at least said polymerization is carried out in small dispersion droplets in non-reactive organic medium to form interpenetrating network beads, and recovering the network beads after addition of talc or silica to the medium.
Claim 31
Dependent Claim
46 words
A method according to Claim 18 wherein said polyorganosiloxane network and said liquid monomer form a gel which is then emulsified in water with organosilicon block polymers, followed by emulsion polymerization of said monomer to produce a free-flowing aqueous coating of said network and said polymer.
Claim 32
Dependent Claim
25 words
A method according to Claim 18 wherein said network in said monomer is cast into a mold, and said polymerization is carried out after casting.
Claim 33
Dependent Claim
25 words
A method according to Claim 18 wherein the monopenetrating network produced thereby is cast into a mold, and said polymerized monomer is cross-linked after casting.
Claim 34
Dependent Claim
33 words
A casting composition for coating and molding comprising a dispersion of a cross-linked polyorganosiloxane in a non-silicone organic monomer, and an initiator dispersed in said monomer which will polymerize said monomer when activated.
Claim 35
Dependent Claim
33 words
A casting composition for coating and molding comprising a dispersion of a cross-linked polyorganosiloxane in a non-silicone organic monomer, and an initiator dispersed in said monomer which will polymerize said monomer when activated.
Claim 36
Dependent Claim
14 words
A casting composition according to Claim 32 wherein said initiator is activatable by heat.
Claim 37
Dependent Claim
16 words
A casting composition according to Claim 33 comprising at least two initiators activatable at different temperatures.
Claim 38
Dependent Claim
21 words
A casting composition according to Claim 32 wherein said initiator is selected from the group consisting of azo and peroxide compounds.
Claim 39
Dependent Claim
32 words
A casting composition according to Claim 32 which also includes a non-reactive solvent for the components whereby the composition is in the form of a pourable gel for preparing films and coatings.
Claim 40
Dependent Claim
17 words
A casting composition according to Claim 32 which also includes a cross-linking agent for said polymerizable monomer.
Claim 41
Dependent Claim
28 words
A molding composition comprising dried beads for molding and extrusion, said beads comprising a dispersion of a relaxed, perturbed, and cross-linked polyorganosiloxane in a homogeneous, non-silicone organic polymer.
Claim 42
Dependent Claim
28 words
A molding composition comprising dried beads for molding and extrusion, said beads comprising a dispersion of a relaxed, perturbed, and cross-linked polyorganosiloxane in a homogeneous, non-silicone organic polymer.
References Cited (Backward Citations)
No citation records indexed.
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