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US3821132A
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Polyurethane foams and method of making same
Assignee: UNIROYAL PLASTICS COMPANY Inc WORLD HEADQUARTERS MIDDLEBURY CT 06749 A CORP OF
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Filing: 1973-02-28
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Granted: 1974-06-28
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Expires: 1993-02-28
Abstract
Abstract High resiliency polyurethane foams are made by the so-called ''''one-shot'''' process by reacting a polyalkylene polyether polyol with an organic polyisocyanate and a chain extender which comprises a major amount of a 1,4-dialkanol of an octahydrothieno(3,4-b)pyrazine 6,6-dioxide and a minor amount of a monoalkanol of an octahydrothieno(3,4-b)pyrazine 6,6-dioxide.
Inventors
- 👤 C Mao
- 👤 S Hook
- 👤 L Bakker
- 👤 J Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:33
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3874
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
24 words
Polyurethane foam as defined in claim 1 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is from 1.5:1 to 9:1.
Claim 2
Dependent Claim
24 words
Polyurethane foam as defined in claim 1 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is from 2:1 to 4.5:1.
Claim 3
Dependent Claim
22 words
Polyurethane foam as defined in claim 1 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is about 4:1.
Claim 4
Dependent Claim
26 words
Polyurethane foam as defined in claim 1 wherein the first-mentioned compound is 1,2,3,4,4a,5,7,7a-octahydrothieno(3,4-b)pyrazine-1,4-bis-( Alpha -methylethanol) 6,6-dioxide and the second-mentioned compound is 1,2,3,4,4a-5,7,7a-octahydrothieno(3, 4-b)pyrazine-1-( Alpha -methylethanol) 6,6-dioxide.
Claim 5
Dependent Claim
24 words
Polyurethane foam as defined in claim 5 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is from 1.5:1 to 9:1.
Claim 6
Dependent Claim
24 words
Polyurethane foam as defined in claim 5 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is from 2:1 to 4.5:1.
Claim 7
Dependent Claim
22 words
Polyurethane foam as defined in claim 5 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is about 4:1.
Claim 8
Dependent Claim
55 words
In a one-shot process for making polyurethane foam wherein a polyalkylene polyether polyol having a hydroxylic functionality of at least two, an organic polyisocyanate and a chain extender are simultaneously mixed together, in the presence of a blowing agent the improvement wherein said chain extender comprises a major amount of a compound having the formula:
Claim 9
Dependent Claim
24 words
A process as defined in claim 9 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is from 1.5:1 to 9:1.
Claim 10
Dependent Claim
24 words
A process as defined in claim 9 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is from 2:1 to 4.5:1.
Claim 11
Dependent Claim
22 words
A process as defined in claim 9 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is about 4:1.
Claim 12
Dependent Claim
25 words
A process as defined in claim 9 wherein the first-mentioned compound is 1,2,3,4,4a,5,7,7a-octahydrothieno(3,4-b)pyrazine-1,4-bis-( Alpha -methylethanol) 6,6-dioxide and the second-mentioned compound is 1,2,3,4,4a,5,7,7a-octahydrothieno(3,4-b)pyrazine-1-( Alpha -methylethanol) 6,6-dioxide.
Claim 13
Dependent Claim
24 words
A process as defined in claim 13 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is from 1.5:1 to 9:1.
Claim 14
Dependent Claim
24 words
A process as defined in claim 13 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is from 2:1 to 4.5:1.
Claim 15
Dependent Claim
22 words
A process as defined in claim 13 wherein the mole ratio of the first-mentioned compound to the second-mentioned compound is about 4:1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |