Patent US2759354A successfully refreshed from Google Patents.
US4246360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire retardant, non-dripping flexible polyurethane foam
Assignee: Solutia Inc
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Filing: 1977-07-22
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Granted: 1981-01-20
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Expires: 1997-07-22
Abstract
Abstract A flexible polyurethane foam is provided which is fire retardant and non-dripping upon exposure to flame. The flexible polyurethane foam is prepared by the reaction of a polyol, an isocyanate and a protein.
Inventors
- 👤 Jasper H. Brown
- 👤 Albert W. Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6415; C08G18/6446; Y; Y10; Y10S; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
72 words
A flexible foam comprising polyurethane, a protein present in an amount from about 10 to 100 percent based on the weight of polyol used in preparation of said foam, and a flame retarding amount of flame retardant selected from chlorinated paraffin, trialkyl phosphate, dialkyl aryl phosphate, alkyl diaryl phosphate, triaryl phosphate, diethylene glycol bis(di-2-chloroethyl)phosphate, 2,2-bis(chloromethyl)trimethylene bis[bis(2-chloroethyl)phosphate] and polyphosphonate of the formula ##STR3## wherein n has an average value of 1 to 2.
Claim 2
Dependent Claim
72 words
A flexible foam comprising polyurethane, a protein present in an amount from about 10 to 100 percent based on the weight of polyol used in preparation of said foam, and a flame retarding amount of flame retardant selected from chlorinated paraffin, trialkyl phosphate, dialkyl aryl phosphate, alkyl diaryl phosphate, triaryl phosphate, diethylene glycol bis(di-2-chloroethyl)phosphate, 2,2-bis(chloromethyl)trimethylene bis[bis(2-chloroethyl)phosphate] and polyphosphonate of the formula ##STR3## wherein n has an average value of 1 to 2.
Claim 3
Dependent Claim
13 words
Foam of claim 1 wherein said protein is a simple or conjugated protein.
Claim 4
Dependent Claim
20 words
Foam of claim 1 wherein said retardant is selected from chlorinated paraffin, alkyl diaryl phosphate, triaryl phosphate and 2,2-bis(chloromethyl)trimethylene bis[bis(2-chloroethyl)phosphate].
Claim 5
Dependent Claim
25 words
Foam of claim 1, said protein being present in an amount from about 20 to about 50 percent based on the weight of said polyol.
Claim 6
Dependent Claim
17 words
Foam of claim 1 wherein said protein is selected from albumin, globulin, glutelin, prolamin, albuminoid and protamin.
Claim 7
Dependent Claim
15 words
Foam of claim 1 wherein said protein is selected from casein, bone glue and gelatin.
Claim 8
Dependent Claim
35 words
Foam of claim 1 formed by reacting isocyanate with said polyol in a mixture comprising said protein, said flame retardant and a buffer which maintains pH of the mixture from about 5.5 to about 8.5.
Claim 9
Dependent Claim
13 words
Foam of claim 7 wherein said protein is a simple or conjugated protein.
Claim 10
Dependent Claim
20 words
Foam of claim 7 wherein said retardant is selected from chlorinated paraffin, alkyl diaryl phosphate, triaryl phosphate and 2,2-bis(chloromethyl)trimethylene bis[bis(2-chloroethyl)phosphate].
Claim 11
Dependent Claim
28 words
Foam of claim 7, said protein being present in said foam in an amount from about 20 to about 50 percent based on the weight of said polyol.
Claim 12
Dependent Claim
17 words
Foam of claim 7 wherein said protein is selected from albumin, globulin, glutein, prolamin, albuminoid and protamin.
Claim 13
Dependent Claim
21 words
Foam of claim 1 formed by adding difunctional isocyanate to a mixture of said polyol, said protein and said flame retardant.
Claim 14
Dependent Claim
13 words
Foam of claim 12 wherein said protein is a simple or conjugated protein.
Claim 15
Dependent Claim
20 words
Foam of claim 12 wherein said retardant is selected from chlorinated paraffin, alkyl diaryl phosphate, triaryl phosphate and 2,2-bis(chloromethyl)trimethylene bis[bis(2-chloroethyl)phosphate].
Claim 16
Dependent Claim
28 words
Foam of claim 12, said protein being present in said foam in an amount from about 20 to about 50 percent based on the weight of said polyol.
Claim 17
Dependent Claim
15 words
Foam of claim 12 wherein said protein is selected from casein, bone glue and gelatin.
Claim 18
Dependent Claim
21 words
Foam of claim 12, said mixture comprising a buffer which maintains pH of the mixture from about 5.5 to about 8.5.
Claim 19
Dependent Claim
20 words
Foam of claim 17 wherein said retardant is selected from chlorinated paraffin, alkyl diaryl phosphate, triaryl phosphate and 2,2-bis(chloromethyl)trimethylene bis[bis(2-chloroethyl)phosphate].
Claim 20
Dependent Claim
28 words
Foam of claim 17, said protein being present in said foam in an amount from about 20 to about 50 percent based on the weight of said polyol.
Claim 21
Dependent Claim
17 words
Foam of claim 17 wherein said protein is selected from albumin, globulin, glutelin, prolamin, albuminoid and protamin.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-20 | 1984-07-21 | 1985-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-20 | 1988-07-21 | 1989-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-20 | 1992-07-21 | 1993-01-20 | $7700.00 | Window Closed / Lapsed |