US5124423A
Expired / Lapsed
US
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Process for preparing organosilicon polymers
Assignee: National Starch and Chemical Investment Holding Corp
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Filing: 1990-01-05
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Granted: 1992-06-23
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Expires: 2010-01-05
Abstract
Abstract Novel thermoset and thermoplastic organosilicon polymers, comprised substantially of alternating polycyclic hydrocarbon residues and cyclic polysiloxane or tetrahedral siloxysilane residues linked through carbon-silicon bonds, are disclosed.
Inventors
- 👤 Raymond T. Leibfried
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:51
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/48; C08L; C08L83/00; C08L83/14
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
138 words
A method of preparing a crosslinked organosilicon polymer comprised substantially of alternating polycyclic hydrocarbon residues and cyclic polysiloxane or tetrahedral siloxysilane residues linked through carbon-silicon bonds, which method consisting essentially of providing (a) a cyclic polysiloxane or tetrahedral siloxysilane containing at least two ≡SiH groups and (b) a polycyclic polyene having at least two non-aromatic carbon-carbon double bonds in its rings, wherein the ratio of carbon-carbon double bonds in the rings of (b) to ≡SiH groups in (a) is in the range of about 0.5:1 up to about 1.8:1 and at least one of (a) and (b) has more than two reactive sites and reacting the cyclic polysiloxane or the tetrahedral siloxysilane (a) and the polycyclic polyene (b) in the presence of a platinum-containing catalyst and subjecting said polymer to heat to drive said crosslinking to a maximum.
Claim 2
Independent Claim
138 words
A method of preparing a crosslinked organosilicon polymer comprised substantially of alternating polycyclic hydrocarbon residues and cyclic polysiloxane or tetrahedral siloxysilane residues linked through carbon-silicon bonds, which method consisting essentially of providing (a) a cyclic polysiloxane or tetrahedral siloxysilane containing at least two ≡SiH groups and (b) a polycyclic polyene having at least two non-aromatic carbon-carbon double bonds in its rings, wherein the ratio of carbon-carbon double bonds in the rings of (b) to ≡SiH groups in (a) is in the range of about 0.5:1 up to about 1.8:1 and at least one of (a) and (b) has more than two reactive sites and reacting the cyclic polysiloxane or the tetrahedral siloxysilane (a) and the polycyclic polyene (b) in the presence of a platinum-containing catalyst and subjecting said polymer to heat to drive said crosslinking to a maximum.
Claim 3
Dependent Claim
81 words
The method of claim 1 wherein the cyclic polysiloxane or tetrahedral siloxysilane containing at least two ≡SiH groups is selected from the class consisting of: ##STR15## wherein R is hydrogen, a substituted or unsubstituted alkyl, alkoxy, aromatic or aryloxy radical, n is an integer from 3 to about 20, and R is hydrogen on at least two of the silicon atoms; and ##STR16## wherein R is as defined above and is hydrogen on at least two silicon atoms in the molecule.
Claim 4
Dependent Claim
25 words
The method of claim 2 wherein the silicon containing residue is a polyvalent residue based on a cyclic polysiloxane or a mixture of cyclic polysiloxanes.
Claim 5
Dependent Claim
24 words
The method of claim 2 wherein the silicon-containing residue is a polyvalent residue based on a tetrahedral siloxysilane or a mixture of tetrahedral siloxysilanes.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein the polycyclic hydrocarbon residue is a divalent saturated residue based on norbornadiene.
Claim 7
Dependent Claim
18 words
The method of claim 3 wherein the polycyclic hydrocarbon residue is a divalent saturated residue base on norbornadiene.
Claim 8
Dependent Claim
18 words
The method of claim 4 wherein the polycyclic hydrocarbon residue is a divalent saturated residue based on norbornadiene.
Claim 9
Dependent Claim
18 words
The method of claim 1 wherein the polycyclic hydrocarbon residue is a saturated divalent residue based on dicyclopentadiene.
Claim 10
Dependent Claim
18 words
The method of claim 3 wherein the polycyclic hydrocarbon residue is a saturated divalent residue based on dicyclopentadiene.
Claim 11
Dependent Claim
18 words
The method of claim 4 wherein the polycyclic hydrocarbon residue is a saturated divalent residue based on dicyclopentadiene.
Claim 12
Dependent Claim
24 words
The method of claim 1 wherein the polycyclic polyene is selected from the class consisting of norbornadiene, dicyclopentadiene, tricyclopentadiene, hexahydronaphthalene, dimethanohexahydronaphthalene and norbornadiene dimer.
Claim 13
Dependent Claim
24 words
The method of claim 3 wherein the polycyclic polyene is selected from the class consisting of norbornadiene, dicyclopentadiene, tricyclopentadiene, hexahydronaphthalene, dimethanohexahydronaphthalene and norbornadiene dimer.
Claim 14
Dependent Claim
24 words
The method of claim 4 wherein the polycyclic polyene is selected from the class consisting of norbornadiene, dicyclopentadiene, tricyclopentadiene, hexahydronaphthalene, dimethanohexahydronaphthalene and norbornadiene dimer.
Claim 15
Dependent Claim
33 words
The method of claim 1 wherein the ratio of carbon-carbon double bonds in (b) to ≡SiH groups in the rings of (a) is in the range of about 0.7:1 up to about 1.3:1.
Claim 16
Dependent Claim
34 words
The method of claim 1 wherein the ratio of carbon-carbon double bonds in the rings of (b) to ≡SiH groups in (a) is in the range of from about 0.8:1 up to about 1.1:1.
Claim 17
Dependent Claim
24 words
The method of claim 1 wherein the platinum-containing catalyst is selected from the group consisting of chloroplatinic acid, PtCl 2 and dibenzonitrile platinum dichloride.
Claim 18
Dependent Claim
12 words
The method of claim 1 wherein the platinum-containing catalyst is chloroplatinic acid.
Claim 19
Dependent Claim
12 words
The method of claim 2 wherein the platinum-containing catalyst is chloroplatinic acid.
Claim 20
Dependent Claim
41 words
The method of claim 1 wherein the polymer is a thermoplastic polymer and the ratio of carbon-carbon double bonds in the rings of (B) to SiH groups in (a) is in the range of from about 0.5:1 up to about 0.7:1.
Claim 21
Dependent Claim
41 words
The method of claim 1 wherein the polymer is a thermoplastic polymer and the ratio of carbon-carbon double bonds in the rings of (b) to SiH groups in (a) is in the range of from about 1.3:1 up to about 1.8:1.
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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) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |