Patent US3933690A successfully refreshed from Google Patents.
US3933690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dihalobutenediol containing urethane foam compositions
Assignee: Zeneca Inc
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Filing: 1973-12-13
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Granted: 1976-01-20
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Expires: 1993-12-13
Abstract
Abstract Polyol blends which comprise a mixture of dihalobutenediol and polyhydroxy compounds wherein the hydroxyl number of the mixture is from about 200 to 800 are disclosed. A process for preparing polyol blends and flameretardant polyurethane compositions using the polyol blends are also disclosed.
Inventors
- 👤 Gaetano F. D'Alelio
- 👤 Erich Kuehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:12
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/675; C08G18/677; C08G18/6775; C08G18/40; C08G18/48; C08G18/487; C08G18/4879
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
112 words
A flame-retardant polyurethane foam composition formed in the presence of a blowing agent which comprises the product formed by the reaction of an organic di- or poly-isocyanate and a polyol blend comprised of a mixture of 2,3-dihalo-2-butene-1,4-diol and a polyhydroxy compound selected from the group consisting of sorbitol, mono- and di-saccharides and alkoxylated sorbitol and mono- and di-saccharides containing up to 10 oxyalkylene or oxyarylene groups per hydroxyl groups of the sorbitol and mono- and di-saccharide wherein the hydroxyl number of said blend is from about 300 to about 600 and said 2,3-dihalo-2-butene-1,4-diol is present at a concentration of from about 15% to 40% based on the weight of the polyol blend.
Claim 2
Dependent Claim
112 words
A flame-retardant polyurethane foam composition formed in the presence of a blowing agent which comprises the product formed by the reaction of an organic di- or poly-isocyanate and a polyol blend comprised of a mixture of 2,3-dihalo-2-butene-1,4-diol and a polyhydroxy compound selected from the group consisting of sorbitol, mono- and di-saccharides and alkoxylated sorbitol and mono- and di-saccharides containing up to 10 oxyalkylene or oxyarylene groups per hydroxyl groups of the sorbitol and mono- and di-saccharide wherein the hydroxyl number of said blend is from about 300 to about 600 and said 2,3-dihalo-2-butene-1,4-diol is present at a concentration of from about 15% to 40% based on the weight of the polyol blend.
Claim 3
Dependent Claim
33 words
A flame-retardant polyurethane foam composition of claim 1 wherein the polyol blend is comprised of 2,3-dibromo-2-butene-1,4-diol and polyoxypropylene sorbitol wherein the oxypropylene content is from 2 to 20 mols per mol of sorbitol.
Claim 4
Dependent Claim
13 words
A flame-retardant polyurethane foam composition of claim 1 wherein the 2,3-dihalo-2-butene-1,4-diol is 2,3-dibromo-2-butene-1,4-diol.
Claim 5
Dependent Claim
31 words
A flame-retardant polyurethane foam composition of claim 1 wherein the 2,3-dihalo-2-butene-1,4-diol is 2,3-dibromo-2-butene-1,4-diol which is present at a concentration of about 25 percent based on the weight of the polyol blend.
Claim 6
Dependent Claim
33 words
A flame-retardant polyurethane foam composition of claim 1 wherein the polyol blend is comprised of dibromobutenediol and polyoxypropylene sucrose wherein the oxypropylene content is from 2 to 20 mols per mol of sucrose.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |