US4196268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolysis-resistant flexible polyurethane foams
Assignee: Monsanto Co
•
Filing: 1979-01-15
•
Granted: 1980-04-01
•
Expires: 1999-01-15
Abstract
Abstract Hydrolytic stability of flexible polyesterurethane foam containing haloalkyl phosphate fire retardant is substantially increased by including a small amount of alkyl benzyl phthalate in the reaction mixture used in preparation of the foam.
Inventors
- 👤 Jasper H. Brown
- 👤 Donald S. T. Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:55
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0038; C08J9/0023; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/12; C08K5/49; C08K5/51; C08K5/52; C08K5/521; C08J2375/00; C08J2375/04; C08J2375/06; Y; Y10; Y10S; Y10S521/00; Y10S521/906
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
41 words
Flexible polyurethane foam composition prepared by subjecting to flexible polyurethane foam-forming conditions a mixture of flexible polyurethane foam-forming reactants including polyester-polyol and diisocyanate, haloalkyl phosphate and alkyl benzyl phthalate in an amount sufficient to increase the hydrolytic stability of said foam.
Claim 2
Dependent Claim
41 words
Flexible polyurethane foam composition prepared by subjecting to flexible polyurethane foam-forming conditions a mixture of flexible polyurethane foam-forming reactants including polyester-polyol and diisocyanate, haloalkyl phosphate and alkyl benzyl phthalate in an amount sufficient to increase the hydrolytic stability of said foam.
Claim 3
Dependent Claim
50 words
Composition of claim 1 wherein the alkyl radical in said phthalate contains from about 4 to about 8 carbon atoms and said mixture contains from about 5 to about 25 phr chloroalkyl phosphate in which each chloroalkyl radical is unbranched and contains from about 2 to about 4 carbon atoms.
Claim 4
Dependent Claim
31 words
Composition of claim 2 wherein said mixture includes a catalyst for reaction of said reactants and said catalyst is substantially composed of amine containing at least one >N--C--C--O-- radical per molecule.
Claim 5
Dependent Claim
26 words
Composition of claim 2, said mixture containing said phthalate and said phosphate in a weight ratio of phthalate to phosphate from about 1:8 to about 2:1.
Claim 6
Dependent Claim
11 words
Composition of claim 2, said phthalate being predominantly butyl benzyl phthalate.
Claim 7
Dependent Claim
12 words
Composition of claim 1, said phosphate containing at least two β-chloroethyl groups.
Claim 8
Dependent Claim
24 words
Composition of claim 6 wherein the alkyl radical in said phthalate is essentially straight-chain and contains from about 4 to about 8 carbon atoms.
Claim 9
Dependent Claim
31 words
Composition of claim 7 wherein said mixture includes a catalyst for reaction of said reactants and said catalyst is predominantly composed of amine containing at least one >N--C--C--O-- radical per molecule.
Claim 10
Dependent Claim
27 words
Composition of claim 7, said mixture containing from about 10 to about 20 phr of said phosphate and said ratio being from about 1:4 to about 1:1.
Claim 11
Dependent Claim
35 words
Composition of claim 7, said mixture containing from about 4 to about 12 phr of said phthalate and, based on the weight of said phthalate, from about 0.03% to about 0.4% of a tin salt.
Claim 12
Dependent Claim
12 words
Composition of claim 7, said phthalate consisting essentially of butyl benzyl phthalate.
Claim 13
Dependent Claim
53 words
Method for increasing hydrolytic stability of flexible polyurethane foam prepared by subjecting to flexible polyurethane foam-forming conditions a mixture of haloalkyl phosphate and flexible polyurethane foam-forming reactants including polyester-polyol and polyisocyanate, which method comprises including alkyl benzyl phthalate in said mixture in an amount sufficient to increase the hydrolytic stability of said foam.
Claim 14
Dependent Claim
53 words
Method for increasing hydrolytic stability of flexible polyurethane foam prepared by subjecting to flexible polyurethane foam-forming conditions a mixture of haloalkyl phosphate and flexible polyurethane foam-forming reactants including polyester-polyol and polyisocyanate, which method comprises including alkyl benzyl phthalate in said mixture in an amount sufficient to increase the hydrolytic stability of said foam.
Claim 15
Dependent Claim
20 words
Method of claim 12 wherein the alkyl radical in said phthalate contains from about 4 to about 8 carbon atoms.
Claim 16
Dependent Claim
29 words
Method of claim 13 wherein said mixture includes a catalyst for reaction of said reactants and said catalyst is predominantly amine containing at least one >N--C--C--O-- radical per molecule.
Claim 17
Dependent Claim
33 words
Method of claim 13 wherein said mixture contains from about 5 to about 25 phr chloroalkyl phosphate in which each chloroalkyl radical is unbranched and contains from 2 to about 3 carbon atoms.
Claim 18
Dependent Claim
36 words
Method of claim 15 wherein said phthalate and said phosphate are present in said mixture in a ratio of phthalate to phosphate from about 1:4 to about 1:1, said phosphate containing at least three β-chloroethyl groups.
Claim 19
Dependent Claim
12 words
Method of claim 16, said phthalate consisting essentially of butyl benzyl phthalate.
References Cited (Backward Citations)
US3143517A
Cited
US3157613A
Cited
US3192242A
Cited
US3416601A
Cited
US3798198A
Cited
US3772222A
Cited
US3847843A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-01 | 1983-10-01 | 1984-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-01 | 1987-10-01 | 1988-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-01 | 1991-10-01 | 1992-04-01 | $7700.00 | Window Closed / Lapsed |