Patent US4239867A successfully refreshed from Google Patents.
US4239867A
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Inhibited curable solventless organopolysiloxane compositions
Assignee: Dow Silicones Corp
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Filing: 1979-06-04
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Granted: 1980-12-16
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Expires: 1999-06-04
Abstract
Abstract What is disclosed is platinum catalyzed mixtures of silicon hydride and CH 2 ═CHSi--containing siloxanes which contain a platinum catalyst inhibitor and which may contain a reactive diluent to give prolonged resin working time and which do not give striations in the final cured resin product.
Inventors
- 👤 Gary E. Legrow
- 👤 Laura A. Gauthier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:46
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/46; C; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08K5/54; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/045; C08G77/12; C08G77/20
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
170 words
An improved curable composition comprising (a) an organopolysiloxane containing from 67 to 85 mol percent C 6 H 5 SiO 3/2 units and 33 to 15 mol percent of CH 2 ═CH(CH 3 ) 2 SiO 1/2 units, said organopolysiloxane having an average of at least 8 silicon atoms per molecule; (b) a silicon hydride containing polysiloxane crosslinker for (a), said (b) being present in an amount sufficient to provide about 0.9 to 1.1 mol of silicon hydride per mol of CH 2 ═CHSi.tbd. present in (a) and (e); (c) a platinum catalyst of the formula [(C 4 H 9 ) 3 PPtCl 2 ] 2 ; (d) a catalyst inhibitor of the general formula R 1 R 2 R 3 N wherein R 1 , R 2 and R 3 are each monovalent alkyl radicals containing from 1 to 28 carbon atoms, there is a total of from 12 to 30 carbon atoms in the molecule; and (e) a reactive diluent of the formula [CH.sub.2 ═CH(CH.sub.3).sub.2 SiO].sub.2 Si(C.sub.6 H.sub.5).sub.2.
Claim 2
Dependent Claim
170 words
An improved curable composition comprising (a) an organopolysiloxane containing from 67 to 85 mol percent C 6 H 5 SiO 3/2 units and 33 to 15 mol percent of CH 2 ═CH(CH 3 ) 2 SiO 1/2 units, said organopolysiloxane having an average of at least 8 silicon atoms per molecule; (b) a silicon hydride containing polysiloxane crosslinker for (a), said (b) being present in an amount sufficient to provide about 0.9 to 1.1 mol of silicon hydride per mol of CH 2 ═CHSi.tbd. present in (a) and (e); (c) a platinum catalyst of the formula [(C 4 H 9 ) 3 PPtCl 2 ] 2 ; (d) a catalyst inhibitor of the general formula R 1 R 2 R 3 N wherein R 1 , R 2 and R 3 are each monovalent alkyl radicals containing from 1 to 28 carbon atoms, there is a total of from 12 to 30 carbon atoms in the molecule; and (e) a reactive diluent of the formula [CH.sub.2 ═CH(CH.sub.3).sub.2 SiO].sub.2 Si(C.sub.6 H.sub.5).sub.2.
Claim 3
Dependent Claim
14 words
A composition as claimed in claim 1 wherein R 1 has 18 carbon atoms.
Claim 4
Dependent Claim
23 words
A composition as claimed in claim 2 wherein R 1 has 18 carbon atoms, R 2 is methyl and R 3 is methyl.
Claim 5
Dependent Claim
46 words
A composition of matter as claimed in claim 1 wherein there is present 80-90 parts of (a); 20-25 parts of (b); 5-15 ppm of Pt from (c); 1-4 parts of (e) and (d) is present in an amount sufficient to inhibit the catalytic effect of (c).
Claim 6
Dependent Claim
46 words
A composition of matter as claimed in claim 4 wherein there is present 86 parts of (a); 21.5 parts of (b); 10 ppm of Pt from (c); 2.5 parts of (e) and (d) is present in an amount sufficient to inhibit the catalytic effect of (c).
Claim 7
Dependent Claim
27 words
A composition as claimed in claim 5 wherein (d) is present in an amount such that there is 1-20 nitrogen atoms present for each Pt atom present.
Claim 8
Dependent Claim
27 words
A composition as claimed in claim 6 wherein (d) is present in an amount such that there is 1 nitrogen atom present for each Pt atom present.
Claim 9
Dependent Claim
11 words
A composition of matter as claimed in claim 1 when cured.
Claim 10
Dependent Claim
15 words
An article comprising an electronic component encapsulated with the composition of claim 1 and cured.
Claim 11
Dependent Claim
12 words
An article in accordance with claim 9 which is a backpack transistor.
Claim 12
Dependent Claim
11 words
An article in accordance with claim 9 which is a transformer.
Claim 13
Dependent Claim
17 words
An article in accordance with claim 9 which is a gas sensor for electronic auto emission testing.
Claim 14
Dependent Claim
68 words
A composition of matter which is a mixture of [(C 4 H 9 ) 3 PPtCl 2 ] 2 and an amine inhibitor of the formula R 1 R 2 R 3 N wherein R 1 , R 2 and R 3 are each monovalent alkyl radicals containing from 1 to 28 carbon atoms, there is a total of from 12 to 30 carbon atoms in the molecule.
Claim 15
Dependent Claim
68 words
A composition of matter which is a mixture of [(C 4 H 9 ) 3 PPtCl 2 ] 2 and an amine inhibitor of the formula R 1 R 2 R 3 N wherein R 1 , R 2 and R 3 are each monovalent alkyl radicals containing from 1 to 28 carbon atoms, there is a total of from 12 to 30 carbon atoms in the molecule.
Claim 16
Dependent Claim
14 words
A composition as claimed in claim 13 wherein R 1 has 18 carbon atoms.
Claim 17
Dependent Claim
23 words
A composition as claimed in claim 14 wherein R 1 has 18 carbon atoms, R 2 is methyl and R 3 is methyl.
Claim 18
Dependent Claim
30 words
A composition as claimed in claim 13 wherein there is present an amount of the amine inhibitor such that there is 1-20 nitrogen atoms present for each Pt atom present.
Claim 19
Dependent Claim
29 words
A composition as claimed in claim 16 wherein the amine inhibitor is present in an amount such that there is 1 nitrogen atom present for each Pt atom present.
Claim 20
Dependent Claim
156 words
A composition of matter comprising (a) an organopolysiloxane containing from 67 to 85 mol percent C 6 H 5 SiO 3/2 units and 33 to 15 mol percent of CH 2 ═CH(CH 3 ) 2 SiO 1/2 units, said organopolysiloxane having an average of at least 8 silicon atoms per molecule; (b) a silicon hydride containing polysiloxane crosslinker for (a), said (b) being present in an amount sufficient to provide about 0.9 to 1.1 mol of silicon hydride per mol of CH 2 ═CHSi.tbd. present in (a); (c) a platinum catalyst of the formula [(C 4 H 9 ) 3 PPtCl 2 ] 2 ; and (d) a catalyst inhibitor of the general formula R 1 R 2 R 3 N wherein R 1 , R 2 and R 3 are each monovalent alkyl radicals containing from 1 to 28 carbon atoms, there is a total of from 12 to 30 carbon atoms in the molecule.
Claim 21
Dependent Claim
156 words
A composition of matter comprising (a) an organopolysiloxane containing from 67 to 85 mol percent C 6 H 5 SiO 3/2 units and 33 to 15 mol percent of CH 2 ═CH(CH 3 ) 2 SiO 1/2 units, said organopolysiloxane having an average of at least 8 silicon atoms per molecule; (b) a silicon hydride containing polysiloxane crosslinker for (a), said (b) being present in an amount sufficient to provide about 0.9 to 1.1 mol of silicon hydride per mol of CH 2 ═CHSi.tbd. present in (a); (c) a platinum catalyst of the formula [(C 4 H 9 ) 3 PPtCl 2 ] 2 ; and (d) a catalyst inhibitor of the general formula R 1 R 2 R 3 N wherein R 1 , R 2 and R 3 are each monovalent alkyl radicals containing from 1 to 28 carbon atoms, there is a total of from 12 to 30 carbon atoms in the molecule.
Claim 22
Dependent Claim
14 words
A composition as claimed in claim 18 wherein R 1 has 18 carbon atoms.
Claim 23
Dependent Claim
23 words
A composition as claimed in claim 19 wherein R 1 has 18 carbon atoms, R 2 is methyl and R 3 is methyl.
Claim 24
Dependent Claim
42 words
A composition of matter as claimed in claim 18 wherein there is present 80-90 parts of (a); 20-25 parts of (b); 5-15 ppm of Pt from (c) and (d) is present in an amount sufficient to inhibit the catalytic effect of (c).
Claim 25
Dependent Claim
42 words
A composition of matter as claimed in claim 21 wherein there is present 86 parts of (a); 21.5 parts of (b); 10 ppm of Pt from (c) and (d) is present in an amount sufficient to inhibit the catalytic effect of (c).
Claim 26
Dependent Claim
27 words
A composition as claimed in claim 22 wherein (d) is present in an amount such that there is 1-20 nitrogen atoms present for each Pt atom present.
Claim 27
Dependent Claim
26 words
A composition as claimed in claim 23 wherein (d) is present in an amount such that there is 1 nitrogen atom for each Pt atom present.
Claim 28
Dependent Claim
11 words
A composition of matter as claimed in claim 18 when cured.
Claim 29
Dependent Claim
15 words
An article comprising an electronic component encapsulated with the composition of claim 18 and cured.
Claim 30
Dependent Claim
12 words
An article in accordance with claim 26 which is a backpack transistor.
Claim 31
Dependent Claim
11 words
An article in accordance with claim 26 which is a transformer.
Claim 32
Dependent Claim
17 words
An article in accordance with claim 26 which is a gas sensor for electronic auto emission testing.
References Cited (Backward Citations)
US2894930A
Cited
US3192181A
Cited
US3188300A
Cited
US3188299A
Cited
US3445420A
Cited
US3383356A
Cited
US3453233A
Cited
US3453234A
Cited
US3532649A
Cited
US3697473A
Cited
US3723567A
Cited
US4045390A
Cited
US3944519A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |