US4143029A
Expired / Lapsed
US
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Flame retarded polyurethane compositions
Assignee: Uniroyal Chemical Co Inc
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Filing: 1977-05-13
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Granted: 1979-03-06
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Expires: 1997-05-13
Abstract
Abstract A dripless, fire-retarded, polyurethane elastomer comprising a blend of the elastomer with a hexaalkoxymethylmelamine, a trihydrocarbylcarbonylmelamine and compounds selected from the group comprising (1) aromatic bismaleimide or (2) an aromatic bismaleimide generator.
Inventors
- 👤 Demetreos N. Matthews
- 👤 Walter Nudenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:28
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K5/3417; C08K5/3467; C08K5/3477; C08K5/3492; C08K5/34922; C08L; C08L61/00; C08L61/20; C08L61/26; C08L61/28; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
96 words
A flame retarded polyurethane elastoplastic compound which is non-drip at combusion conditions which comprises said elastomer in combination with a minor amount of (A) a hexaalkoxymethylmelamine having the general formula ##STR4## wherein R is a C 1 -C 5 alkyl radical; and (b) a synergist wherein the synergist is (1) a trihydrocarbylcarbonylmalemine having the general formula ##STR5## wherein R 1 is C 1 -C 5 alkyl, phenyl toluyl, dimethylphenyl or cyanomethyl; (2) para phenylene-bismaleimide; (3) an aromatic bismaleimide generator having the general formula ##STR6## wherein A is --CH 2 -- or --O--; or (4) mixtures thereof.
Claim 2
Dependent Claim
96 words
A flame retarded polyurethane elastoplastic compound which is non-drip at combusion conditions which comprises said elastomer in combination with a minor amount of (A) a hexaalkoxymethylmelamine having the general formula ##STR4## wherein R is a C 1 -C 5 alkyl radical; and (b) a synergist wherein the synergist is (1) a trihydrocarbylcarbonylmalemine having the general formula ##STR5## wherein R 1 is C 1 -C 5 alkyl, phenyl toluyl, dimethylphenyl or cyanomethyl; (2) para phenylene-bismaleimide; (3) an aromatic bismaleimide generator having the general formula ##STR6## wherein A is --CH 2 -- or --O--; or (4) mixtures thereof.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein the hexaalkoxymethylmelamine is hexamethoxymethylmelamine, hexaethoxymethylmelamine, hexapropoxymethylmelamine, hexabutoxymethylmelamine, hexaisobutoxymethylmelamine and hexapentoxymethylmelamine.
Claim 4
Dependent Claim
18 words
The composition of claim 1 wherein the synergist is triacetylmelamine, tripropionylmelamine, tributanoylmelamine, tripentanoylmelamine, tribenzoylmelamine, tri-(p-methylbenzoyl)melamine, tri-(2,4-dimethylbenzoyl)melamine or tricyanoacetylmelamine.
Claim 5
Dependent Claim
19 words
The composition of claim 3 wherein an additional synergist is included wherein the additional synergist is an aromatic bismaleimide.
Claim 6
Dependent Claim
14 words
The composition of claim 1 wherein whereas the bismaleimide is N,N'-m-phenylene-bis(3,6-methano-1,2,3,6-tetrahydrophthalimide), N,N'-p-phenylene-bis(3,6-methano-1,2,3,6-tetrahydrophthalimide) or N,N'-p-phenylene-bis(3,6-oxa-1,2,3,6-tetrahydrophthalimide).
Claim 7
Independent Claim
109 words
A method for rendering a polyurethane elastoplastic flame-retarded and non-dripping at combustion conditions which comprises blending the elastoplastic with a minor amount of a hexaalkoxymethylmelamine having the general formula ##STR7## wherein R is a C 1 -C 5 alkyl group and a synergist, wherein the synergist is (1) a trihydrocarbylcarbonylmelamine having the general formula ##STR8## wherein R 1 is a C 1 -C 5 alkyl, phenyl, toluyl or --CH 2 --C.tbd.N, (2) paraphenylene-maleimide, (3) an aromatic bismaleimide generator having the general formula ##STR9## wherein A is --CH-- or --O--, provided that when the nitrogen atoms are in the meta configuration, A may not be --O--, or (4) mixtures thereof.
Claim 8
Independent Claim
109 words
A method for rendering a polyurethane elastoplastic flame-retarded and non-dripping at combustion conditions which comprises blending the elastoplastic with a minor amount of a hexaalkoxymethylmelamine having the general formula ##STR7## wherein R is a C 1 -C 5 alkyl group and a synergist, wherein the synergist is (1) a trihydrocarbylcarbonylmelamine having the general formula ##STR8## wherein R 1 is a C 1 -C 5 alkyl, phenyl, toluyl or --CH 2 --C.tbd.N, (2) paraphenylene-maleimide, (3) an aromatic bismaleimide generator having the general formula ##STR9## wherein A is --CH-- or --O--, provided that when the nitrogen atoms are in the meta configuration, A may not be --O--, or (4) mixtures thereof.
Claim 9
Dependent Claim
15 words
The method of claim 6 wherein R is methyl, ethyl, propyl, butyl, isobutyl or pentyl.
Claim 10
Dependent Claim
18 words
The method of claim 6 wherein R is methyl, propyl, butyl, pentyl, phenyl, toluyl or --CH 2 --C.tbd.N.
Claim 11
Dependent Claim
18 words
The method of claim 6 wherein the synergist comprises a mixture of a trihydrocarbylcarbonylmelamine and a para phenylenemaleimide.
Claim 12
Dependent Claim
11 words
The method of claim 9 wherein the aromatic bismaleimide is p-phenylenebismaleimide.
Claim 13
Dependent Claim
18 words
The method of claim 10 wherein the trihydrocarbylcarbonylmelamine is triacetylmelamine, tripropionylmelamine, tributanoylmelamine, tripentanoylmelamine, tribenzoylmelamine, tri(p-methylbenzoyl)melamine, tri-(2,4-dimethylbenzoyl)melamine or tricyanoacetylmelamine.
Claim 14
Dependent Claim
15 words
The method of claim 6 wherein the aromatic bismaleimide generator is N,N'-m-phenylene-bis(3,6-methano-1,2,3,6-tetrahydrophthalimide), N,N'-p-phenylenebis(3,6-methano-1,2,3,6-tetrahydrophthalimide) or N,N'-p-phenylene-bis(3,6-oxa-1,2,3,6-tetrahydrophthalimide).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |