US4463107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer/polyol compositions having improved combustion resistance
Assignee: Lyondell Chemical Technology LP
•
Filing: 1982-08-18
•
Granted: 1984-07-31
•
Expires: 2002-08-18
Abstract
Abstract A stable dispersion of a polymer in a polyol which imparts improved combustion resistance to polyurethane foams prepared therefrom wherein the polymer is a free-radical initiated copolymer containing from about 0.5 to 75 weight percent, based on the copolymer, of acrylonitrile and from about 25 to 99.5 weight percent, based on the copolymer, of at least one other polymerizible ethylenically unsaturated monomer and wherein the copolymer is characterized by a crosslinking coefficient of less than 55.
Inventors
- 👤 Donald W. Simroth
- 👤 Frank E. Critchfield
- 👤 Edgar G. Shook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08F; C08F283/00
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
81 words
A stable dispersion of a polymer in a polyol, said dispersion being useful in the preparation of polyurethane foams having improved combustion resistance, wherein the polymer is a free-radical initiated copolymer containing from about 0.5 to 75 weight percent, based on the copolymer, of acrylonitrile and from about 25 to 99.5 weight percent, based on the copolymer, of at least one other polymerizable ethylenically unsaturated monomer and wherein the copolymer is characterized by a crosslinking coefficient of less than about 55.
Claim 2
Dependent Claim
81 words
A stable dispersion of a polymer in a polyol, said dispersion being useful in the preparation of polyurethane foams having improved combustion resistance, wherein the polymer is a free-radical initiated copolymer containing from about 0.5 to 75 weight percent, based on the copolymer, of acrylonitrile and from about 25 to 99.5 weight percent, based on the copolymer, of at least one other polymerizable ethylenically unsaturated monomer and wherein the copolymer is characterized by a crosslinking coefficient of less than about 55.
Claim 3
Dependent Claim
31 words
The stable dispersion of claim 1 wherein the total amount of polymer present in said dispersion is from about 5 to 50 weight percent based on the weight of the dispersion.
Claim 4
Dependent Claim
31 words
The stable dispersion of claim 1 wherein the other polymerizable ethylenically unsaturated monomers are selected from the group consisting of styrene and its derivatives, acrylates, methacrylates, nitrile derivatives, and vinyl acetate.
Claim 5
Dependent Claim
20 words
The stable dispersion of claim 1 wherein more than one other polymerizable ethylenically unsaturated monomer is present in the polymer.
Claim 6
Dependent Claim
19 words
The stable dispersion of claim 1 wherein at least one of the other polymerizable ethylenically unsaturated monomers is styrene.
Claim 7
Dependent Claim
23 words
The stable dispersion of claim 1 wherein the copolymer contains from about 25 to 75 weight percent, based on the copolymer, of acrylonitrile.
Claim 8
Dependent Claim
23 words
The stable dispersion of claim 1 wherein the copolymer contains from about 30 to 70 weight percent, based on the copolymer, of acrylonitrile.
Claim 9
Dependent Claim
22 words
The stable dispersion of claims 1, 6 or 7 wherein the copolymer is characterized by crosslinking coefficient of less than about 50.
Claim 10
Dependent Claim
23 words
The stable dispersion of claims 1, 6 or 7 wherein the copolymer is characterized by a crosslinking coefficient of less than about 20.
Claim 11
Dependent Claim
22 words
The stable dispersion of claims 1, 6 or 7 wherein the copolymer is characterized by a crosslinking coefficient of about zero (0).
Claim 12
Dependent Claim
27 words
The stable dispersion of claim 1 wherein the copolymer is prepared by a free-radical catalyst initiated process carried out at a temperature of 100° C. or higher.
Claim 13
Dependent Claim
64 words
A process for preparing a polyurethane having improved combustion resistance which comprises reacting a stable dispersion of a polymer in a polyol with an organic polyisocyanate in the presence of a catalyst to form such polyurethane wherein the stable dispersion of a polymer in a polyol is the stable dispersion of claim 1 either alone or in combination with other polyols and/or other polymer/polyols.
Claim 14
Dependent Claim
23 words
The process of claim 12 wherein the polyurethane is a cellular polyurethane and wherein a blowing agent is additionally present during the reaction.
Claim 15
Dependent Claim
13 words
The process of claim 13 wherein there is additionally present a foam stabilizer.
Claim 16
Dependent Claim
16 words
The process of claim 12 wherein the stable dispersion is the stable dispersion of claim 6.
Claim 17
Dependent Claim
16 words
The process of claim 12 wherein the stable dispersion is the stable dispersion of claim 7.
Claim 18
Dependent Claim
16 words
The process of claim 12 wherein the stable dispersion is the stable dispersion of claim 8.
Claim 19
Dependent Claim
16 words
The process of claim 12 wherein the stable dispersion is the stable dispersion of claim 9.
Claim 20
Dependent Claim
16 words
The process of claim 12 wherein the stable dispersion is the stable dispersion of claim 10.
Claim 21
Dependent Claim
9 words
A polyurethane comprising the reaction product of claim 12.
Claim 22
Dependent Claim
9 words
A polyurethane comprising the reaction product of claim 15.
Claim 23
Dependent Claim
9 words
A polyurethane comprising the reaction product of claim 16.
Claim 24
Dependent Claim
9 words
A polyurethane comprising the reaction product of claim 17.
Claim 25
Dependent Claim
9 words
A polyurethane comprising the reaction product of claim 18.
Claim 26
Dependent Claim
9 words
A polyurethane comprising the reaction product of claim 19.
References Cited (Backward Citations)
US29118A
Cited
US28715A
Cited
US3383351A
Cited
USRE29118E
Cited
US3304273A
Cited
USRE28715E
Cited
US3655553A
Cited
US3850861A
Cited
US3875258A
Cited
US3953393A
Cited
US4093573A
Cited
US4122056A
Cited
EP0000503A1
Cited
US4148840A
Cited
US4230823A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |