US3909464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant flexible polyanethane foam containing alumina trihydrate
Assignee: Pharmacia and Upjohn Co
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Filing: 1974-03-20
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Granted: 1975-09-30
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Expires: 1994-03-20
Abstract
Abstract Flexible polyurethane foams are described which have outstanding flame retardant properties. The foams are the product of reaction, under foam producing conditions, of a combination of (a) a mixture of toluene diisocyanate and polymethylene polyphenyl isocyanate; (b) a polyether polyol; (c) antimony oxide; (d) a polyhalogenated aromatic compound and (e) alumina trihydrate. The foams meet the very stringent tests for fire retardance required of seat cushioning, mattresses, and like materials in aircraft, institutions such as hospitals, convalescent homes and the like.
Inventors
- 👤 Carlos J Anorga
- 👤 Samuel Chess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:24
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0095; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7607; C08K; C08K3/00; C08K3/10; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/02; C08K5/03; C08J2375/00; C08J2375/04; C08J2375/08; Y; Y10; Y10S; Y10S521/00; Y10S521/904; Y10S521/906
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
155 words
A FLAME RETARDANT FLEXIBLE POLYURETHANE FOAM CONSISTING ESSENTIALLY OF THE PRODUCT OF REACTION, UNDER FOAM PRODUCING CONDITIONS OF: A. A POLYISOCYANATE MIXTURE WHICH CONTAINS FROM 5 PERCENT TO 95 PERCENT BY WEIGHT OF TOLUENE DIISOCYANATE AND FROM 95 PERCENT TO 5 PERCENT BY WEIGHT OF POLYMETHYLENE POLYHENYL POLYISOCYANATE CONTAINING FROM ABOUT 40 PERCENT TO ABOUT 70 PERCENT METHYLENEBIS (PHENYL ISOCYANATE) THE REMAINDER OF SAID POLYMETHYLENE POLYHENYL POLYISOCYANATES HAVING FUNCTIONALLY HIGHER THAN 2.0 B. A POLYETHER POLYOL HAVING AN EQUIVALENT WEIGHT FROM ABOUT 500 TO ABOUT 2500 AND A FUNCTIONALLY FROM ABOUT 2.0 TO ABOUT 4.0, C. FROM ABOUT 2 TO ABOUT 20 PERCENT BY WEIGHT BASED ON WEIGHT OF FINAL FOAM, OF ANTIMONY OXIDE, D. FROM ABOUT 1 TO ABOUT 15 PERCENT BY WEIGHT BASED ON WEIGHT OF FINAL FOAM, OF A POLYHALOGENATED AROMATIC COMPOUND, AND E. FROM ABOUT 1 TO ABOUT 15 PERCENT BY WEIGHT, BASED ON WEIGHT OF FINAL FOAM, OF ALUMINA TRIHYDRATE.
Claim 2
Dependent Claim
155 words
A FLAME RETARDANT FLEXIBLE POLYURETHANE FOAM CONSISTING ESSENTIALLY OF THE PRODUCT OF REACTION, UNDER FOAM PRODUCING CONDITIONS OF: A. A POLYISOCYANATE MIXTURE WHICH CONTAINS FROM 5 PERCENT TO 95 PERCENT BY WEIGHT OF TOLUENE DIISOCYANATE AND FROM 95 PERCENT TO 5 PERCENT BY WEIGHT OF POLYMETHYLENE POLYHENYL POLYISOCYANATE CONTAINING FROM ABOUT 40 PERCENT TO ABOUT 70 PERCENT METHYLENEBIS (PHENYL ISOCYANATE) THE REMAINDER OF SAID POLYMETHYLENE POLYHENYL POLYISOCYANATES HAVING FUNCTIONALLY HIGHER THAN 2.0 B. A POLYETHER POLYOL HAVING AN EQUIVALENT WEIGHT FROM ABOUT 500 TO ABOUT 2500 AND A FUNCTIONALLY FROM ABOUT 2.0 TO ABOUT 4.0, C. FROM ABOUT 2 TO ABOUT 20 PERCENT BY WEIGHT BASED ON WEIGHT OF FINAL FOAM, OF ANTIMONY OXIDE, D. FROM ABOUT 1 TO ABOUT 15 PERCENT BY WEIGHT BASED ON WEIGHT OF FINAL FOAM, OF A POLYHALOGENATED AROMATIC COMPOUND, AND E. FROM ABOUT 1 TO ABOUT 15 PERCENT BY WEIGHT, BASED ON WEIGHT OF FINAL FOAM, OF ALUMINA TRIHYDRATE.
Claim 3
Dependent Claim
47 words
A flame retardant flexible foam according to claim 1 in which the polyisocyanate mixture contains (a) approximately 70 percent by weight of toluene diisocyanate and (b) 30 percent by weight of polymethylene polyphenyl polyisocyanate in which the content of methylenebis-(phenyl isocyanate) is about 50 percent by weight.
Claim 4
Dependent Claim
27 words
A flame retardant flexible foam according to claim 1 in which the polyether polyol is a triol having an equivalent weight from about 900 to about 2300.
Claim 5
Dependent Claim
41 words
A flame retardant flexible foam according to claim 1 in which the polyhalogenated member is a polybrominated aromatic compound which is insoluble in water, has a melting point above 50*C and contains at least about 60 percent by weight of bromine.
Claim 6
Dependent Claim
15 words
A flame retardant flexible foam according to claim 4 wherein the polybrominated compound is hexabromobenzene.
Claim 7
Dependent Claim
16 words
A flame retardant flexible foam according to claim 4 wherein the polybrominated compound is decabromodiphenyl ether.
Claim 8
Dependent Claim
15 words
A flame retardant flexible foam according to claim 4 wherein the polybrominated compound is pentabromoethylbenzene.
Claim 9
Dependent Claim
141 words
A flame retardant flexible polyurethane foam consisting essentially of the product of reaction, under foam producing conditions of: a. a polyisocyanate mixture which contains from 5 percent to 95 percent by weight of toluene diisocyanate, and from 95 percent to 5 percent by weight of polymethylene polyphenyl polyisocyanate containing about 50 percent of methylenebis(phenyl isocyanate), the remainder of said polymethylene polyphenyl polyisocyanates having functionality higher than 2.0; b. a polyether triol having an equivalent weight of about 900 to about 2300; c. from about 5 to about 15 percent by weight, based on weight of final foam, of antimony oxide; d. from about 2 to about 10 percent by weight, based on weight of final foam, of a polyhalogenated aromatic compound; and e. from about 2 to about 10 percent by weight, based on weight of final foam, of alumina trihydrate.
Claim 10
Dependent Claim
141 words
A flame retardant flexible polyurethane foam consisting essentially of the product of reaction, under foam producing conditions of: a. a polyisocyanate mixture which contains from 5 percent to 95 percent by weight of toluene diisocyanate, and from 95 percent to 5 percent by weight of polymethylene polyphenyl polyisocyanate containing about 50 percent of methylenebis(phenyl isocyanate), the remainder of said polymethylene polyphenyl polyisocyanates having functionality higher than 2.0; b. a polyether triol having an equivalent weight of about 900 to about 2300; c. from about 5 to about 15 percent by weight, based on weight of final foam, of antimony oxide; d. from about 2 to about 10 percent by weight, based on weight of final foam, of a polyhalogenated aromatic compound; and e. from about 2 to about 10 percent by weight, based on weight of final foam, of alumina trihydrate.
Claim 11
Dependent Claim
17 words
A flame retardant flexible polyurethane foam according to claim 8 in which the polyhalogenated member is hexabromobenzene.
Claim 12
Dependent Claim
18 words
A flame retardant flexible polyurethane foam according to claim 8 in which the polyhalogenated member is decabromodiphenyl ether.
Claim 13
Dependent Claim
17 words
A flame retardant flexible polyurethane foam according to claim 8 in which the polyhalogenated member is pentabromoethylbenzene.
References Cited (Backward Citations)
US3738953A
Cited
US3810851A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |