US4500688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curable silicone containing compositions and methods of making same
Assignee: Evonik Corp
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Filing: 1982-04-20
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Granted: 1985-02-19
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Expires: 2002-04-20
Abstract
Abstract A melt processable pseudointerpenetrating network of silicones in thermoplastic matrices and a method of producing same is provided by vulcanizing the silicones within the matrices. In a preferred embodiment a two part silicone comprising silicon hydride groups and silicon vinyl-containing groups are reacted in the presence of a platinum complex. Depending on certain parameters chain-extended (thermoplastic) or cross-linked (thermosetting) compositions are produced.
Inventors
- 👤 Barry C. Arkles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:37
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08G; C08G77/00; C08G77/42; C08L101/00; C08L77/00; C08L83/00; C08L83/04; C08G77/04; C08G77/12; C08G77/70; C08L2205/00; C08L2205/04; C08L23/00; C08L23/02; C08L53/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
54 words
A melt processable composition comprising a silicone component which will be vulcanized by the reaction of a hydride-containing silicone within a polymeric thermoplastic matrix to form a silicone pseudointerpenetrating polymer network, said vulcanization of said silicone component by reaction of said hydride-containing silicone being initiated during thermoplastic melt-mixing of said component with said matrix.
Claim 2
Dependent Claim
54 words
A melt processable composition comprising a silicone component which will be vulcanized by the reaction of a hydride-containing silicone within a polymeric thermoplastic matrix to form a silicone pseudointerpenetrating polymer network, said vulcanization of said silicone component by reaction of said hydride-containing silicone being initiated during thermoplastic melt-mixing of said component with said matrix.
Claim 3
Dependent Claim
30 words
A composition according to claim 1 wherein said silicone component ranges from between about 1 weight percent and about 40 weight percent based on the total weight of the composition.
Claim 4
Dependent Claim
25 words
A composition according to claim 1 wherein said thermoplastic matrix is selected from the group consisting of polyamides, thermoplastic polyurethanes, bisphenol A polycarbonates, and polyacetals.
Claim 5
Dependent Claim
30 words
A composition according to claim 1 wherein said silicone component comprises the reaction product of a polymeric hydride group-containing silicone and a polymeric silicone containing at least one unsaturated group.
Claim 6
Dependent Claim
14 words
A composition according to claim 4 wherein said unsaturated group comprises a vinyl group.
Claim 7
Dependent Claim
58 words
A composition according to claim 5 forming a predominantly chain-extended structure wherein said vinyl-containing silicone contains from about two to about four vinyl groups and wherein said hydride-containing silicone contains 1 to 2 times the equivalent of said vinyl-containing silicone with the ratio of said hydride groups to said vinyl groups being between about 1.2:1 and about 6:1.
Claim 8
Dependent Claim
17 words
A composition according to claim 5 wherein the vinyl-containing silicone has two vinyl groups in terminal positions.
Claim 9
Dependent Claim
58 words
A composition according to claim 5 forming a predominantly cross-linked structure wherein said vinyl-containing silicone contains from about two to about thirty vinyl groups and said hydride-containing silicone contains from two to ten times the equivalent of said vinyl-containing silicone with the ratio of the hydride groups to the vinyl groups being between about 1.2:1 and about 6:1.
Claim 10
Dependent Claim
30 words
A composition according to claim 4 wherein said silicone component further comprises constituents selected from the group consisting of methyl groups, phenyl groups, longer chain alkyl groups or cyanopropyl groups.
Claim 11
Independent Claim
39 words
A method for producing a silicone pseudointerpenetrating polymer network comprising vulcanizing a silicone component by the reaction of a hydride-containing silicone within a polymeric thermoplastic matrix at least partially during thermoplastic meltmixing of said silicone component with said matrix.
Claim 12
Independent Claim
39 words
A method for producing a silicone pseudointerpenetrating polymer network comprising vulcanizing a silicone component by the reaction of a hydride-containing silicone within a polymeric thermoplastic matrix at least partially during thermoplastic meltmixing of said silicone component with said matrix.
Claim 13
Dependent Claim
40 words
A method according to claim 10 wherein said silicone component is the reaction product of a polymeric silicone containing hydride groups and a polymeric silicone containing at least one unsaturated group, said reaction conducted in the presence of a catalyst.
Claim 14
Dependent Claim
14 words
A method according to claim 11 wherein said unsaturated group is a vinyl group.
Claim 15
Dependent Claim
13 words
A method according to claim 11 wherein said catalyst comprises a platinum complex.
Claim 16
Dependent Claim
25 words
A method according to claim 10 wherein said thermoplastic matrix is selected from the group consisting of polyamides, thermoplastic polyurethanes, bisphenol A polycarbonates, and polyacetals.
Claim 17
Dependent Claim
75 words
A method according to claim 10 wherein a predominantly chain-extended structure is formed by combining a hydride-containing silicone and a vinyl-containing silicone with the vinyl-containing silicone having from about two to about four vinyl groups and the hydride-containing silicone contains 1 to 2 times the equivalent of the vinyl functionality with the ratio of the hydride groups to the vinyl groups being between about 1.2:1 and 6:1, adding a catalyst and melt-mixing the resultant mixture.
Claim 18
Dependent Claim
11 words
A method according to claim 15 wherein said meltmixing comprises extrusion.
Claim 19
Dependent Claim
13 words
A method according to claim 15 wherein said meltmixing is followed by pelletizing.
Claim 20
Dependent Claim
17 words
A method according to claim 11 further comprising conducting the reaction in the presence of fumed silica.
Claim 21
Dependent Claim
17 words
A method according to claim 13 further comprising conducting the reaction in the presence of vinyl siloxane.
Claim 22
Dependent Claim
48 words
A method according to claim 12 wherein a predominantly cross-linked structure is formed by separately extruding the vinyl- and hydride-containing silicones into separate portions of said thermoplastic matrix, mixing the portions, adding a catalyst and melting the portions together so as to react the vinyl- and hydride-containing silicones.
Claim 23
Dependent Claim
41 words
A method according to claim 12 wherein a predominantly cross-linked structure is formed by extruding together the vinyl- and hydride-containing silicones into said thermoplastic matrix in the presence of a platinum catalyst and a fugitive inhibitor and melt-mixing the resultant mixture.
Claim 24
Independent Claim
55 words
A method according to claims 20 or 21 wherein the vinyl-containing silicone contains from about two to about thirty vinyl groups and the hydride-containing silicone contains from two to ten times the equivalent of the vinyl functionality with the ratio of the hydride groups to the vinyl groups being between about 1.2:1 and about 6:1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |