US4162353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing flexible flame retarded polyurethane foam
Assignee: Lyondell Chemical Technology LP
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Filing: 1978-04-03
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Granted: 1979-07-24
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Expires: 1998-04-03
Abstract
Abstract Novel haloalkyl polyphosphates are prepared by reacting at elevated temperatures a halosubstituted alkyl phosphate such as, for example, tris (2-chloroethyl) phosphate, and an unsubstituted trialkyl phosphate such as, for example, triethyl phosphate. The character of the mixture of the thermal condensates formed can be influenced by the ratio of reactants employed and the extent to which the reaction is allowed to proceed. The resulting reaction products possess superior flame retardant efficiency and impart durable flame resistance when incorporated into flexible urethane foams.
Inventors
- 👤 Anthony J. Papa
- 👤 Walter W. Runyan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:35
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/08; C07F9/09; C07F9/098; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
149 words
A method for producing a flexible polyurethane foam which comprises reacting and foaming a reaction mixture containing: (a) an organic polyisocyanate; (b) a polyol; (c) a catalyst for the reaction of (a) and (b); (d) a blowing agent; and (e) a polyphosphate thermal condensate comprising the reaction product of an unsubstituted trialkylphosphate having the following structure: ##STR16## wherein R is CH 3 , C 2 H 5 , C 3 H 7 or C 4 H 9 ; R' is a C 5 to C 10 hydrocarbon chain and n is 0, 1 or 2 with a 2-haloalkyl phosphate having the following structure: ##STR17## wherein x is Cl or Br; R" is H, CH 3 , CH 2 Cl or CH 2 Br; and R and n are defined above, said thermal condensate being present in an amount sufficient to impart flame retardancy to the resulting flexible polyurethane foam.
Claim 2
Independent Claim
149 words
A method for producing a flexible polyurethane foam which comprises reacting and foaming a reaction mixture containing: (a) an organic polyisocyanate; (b) a polyol; (c) a catalyst for the reaction of (a) and (b); (d) a blowing agent; and (e) a polyphosphate thermal condensate comprising the reaction product of an unsubstituted trialkylphosphate having the following structure: ##STR16## wherein R is CH 3 , C 2 H 5 , C 3 H 7 or C 4 H 9 ; R' is a C 5 to C 10 hydrocarbon chain and n is 0, 1 or 2 with a 2-haloalkyl phosphate having the following structure: ##STR17## wherein x is Cl or Br; R" is H, CH 3 , CH 2 Cl or CH 2 Br; and R and n are defined above, said thermal condensate being present in an amount sufficient to impart flame retardancy to the resulting flexible polyurethane foam.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein the mole ratio of the unsubstituted trialkyl phosphate to the 2-haloalkyl phosphate is from about 1:1 to about 2:1.
Claim 4
Dependent Claim
13 words
The method of claim 1 wherein the unsubstituted trialkyl phosphate is trimethyl phosphate.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the unsubstituted trialkyl phosphate is triethyl phosphate.
Claim 6
Dependent Claim
14 words
The method of claim 1 wherein the 2-haloalkyl phosphate is a tris (2-haloalkyl) phosphate.
Claim 7
Dependent Claim
14 words
The method of claim 1 wherein the tris (2-haloalkyl) phosphate is tris (2-chlorethyl) phosphate.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein the 2-haloalkyl phosphate is a mixture of ##STR18##
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein said thermal condensates are soluble in said polyol.
Claim 10
Dependent Claim
28 words
The method of claim 1 wherein said thermal condensates are present in an amount of less than about 7 parts by weight per 100 parts of said polyol.
Claim 11
Dependent Claim
13 words
A flexible, flame retarded polyurethane foam produced by the process of claim 1.
References Cited (Backward Citations)
US3896187A
Cited
US3959415A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |