US4461851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foam-forming organopolysiloxane composition
Assignee: Momentive Performance Materials Japan LLC
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Filing: 1983-08-26
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Granted: 1984-07-24
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Expires: 2003-08-26
Abstract
Abstract A foam-forming organopolysiloxane composition comprising: (A) 100 parts by weight of alpha , omega dihydroxydiorganopolysiloxane; (B) 0.05-50 parts by weight of a low molecular weight alpha , omega dihydroxydiorganopolysiloxane; (C) 0.5 to 30 moles Si-H per mole SiOH of (A) and (B) as an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule; and (D) 0.1 to 200 ppm of a platinum-containing compound.
Inventors
- 👤 Mitsuyoshi Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:02
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08J2383/00; C08J2383/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
A foam-forming organopolysiloxane composition comprising: (A) 100 parts by weight α,ω diorganopolysiloxane diol having the general formula: ##STR14## where R 1 and R 2 are monovalent hydrocarbon radicals or substituted monovalent hydrocarbon radicals, and n ranges from 200 to 3000; (B) 0.05 to 50 parts by weight α,ω-diorganopolysiloxane diol having the general formula: ##STR15## where R 3 and R 4 are monovalent hydrocarbon radicals or substituted monovalent hydrocarbon radicals, and m ranges from 2 to 46; (C) 0.5 to 30 moles of Si-H groups per mole of silanol groups in (A) and (B) as an organohydrogenpolysiloxane having at least two Si-H groups permolecule and having the general formula: ##EQU3## where R 5 is a saturated monovalent hydrocarbon radical, a is a number varying from 0 to 2 inclusive, b is a number varying from 1 to 3 inclusive, and a+b varies from 1 to 3 inclusive; and (D) 0.1 to 200 ppm of a platinum-containing compound to catalyze the dehydrogenation reaction of (A), (B) and (C).
Claim 2
Dependent Claim
166 words
A foam-forming organopolysiloxane composition comprising: (A) 100 parts by weight α,ω diorganopolysiloxane diol having the general formula: ##STR14## where R 1 and R 2 are monovalent hydrocarbon radicals or substituted monovalent hydrocarbon radicals, and n ranges from 200 to 3000; (B) 0.05 to 50 parts by weight α,ω-diorganopolysiloxane diol having the general formula: ##STR15## where R 3 and R 4 are monovalent hydrocarbon radicals or substituted monovalent hydrocarbon radicals, and m ranges from 2 to 46; (C) 0.5 to 30 moles of Si-H groups per mole of silanol groups in (A) and (B) as an organohydrogenpolysiloxane having at least two Si-H groups permolecule and having the general formula: ##EQU3## where R 5 is a saturated monovalent hydrocarbon radical, a is a number varying from 0 to 2 inclusive, b is a number varying from 1 to 3 inclusive, and a+b varies from 1 to 3 inclusive; and (D) 0.1 to 200 ppm of a platinum-containing compound to catalyze the dehydrogenation reaction of (A), (B) and (C).
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein R 1 and R 2 are methyl groups.
Claim 4
Dependent Claim
12 words
The composition of claim 1 wherein n ranges from 400 to 2000.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein R 3 and R 4 are methyl groups.
Claim 6
Dependent Claim
12 words
The composition of claim 1 wherein m ranges from 2 to 24.
Claim 7
Dependent Claim
25 words
The composition of claim 1 wherein the amount of component (B) ranges from 1 to 20 parts by weight per 100 parts of component (A).
Claim 8
Dependent Claim
12 words
The composition of claim 1 wherein R 5 is a methyl group.
Claim 9
Dependent Claim
25 words
The composition of claim 1 wherein the amount of Si-H ranges from 3 to 20 moles per mole of Si-OH groups in (A) and (B).
Claim 10
Dependent Claim
12 words
The composition of claim 1 wherein the platinum compound is chloroplatinic acid.
Claim 11
Dependent Claim
13 words
The composition of claim 1 wherein the platinum compound is a platinum-olefin complex.
Claim 12
Dependent Claim
16 words
The composition of claim 1 wherein the amount of platinum ranges from 1 to 50 ppm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |