US4067897A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-resistant flameproof compositions
Assignee: Rhone Poulenc Industries SA
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Filing: 1976-03-03
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Granted: 1978-01-10
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Expires: 1996-03-03
Abstract
Abstract Heat-curable compositions are disclosed based on a prepolymer obtained by reacting (a) a N,N'-bis-imide of an unsaturated dicarboxylic acid of the formula ##STR1## in which D represents a divalent radical containing a carbon-carbon double bond and A is a divalent radical which possesses at least 2 carbon atoms, and (b) a di-primary diamine of the general formula NH 2 --B -- NH 2 , in which B represents a divalent radical which does not have more than 30 carbon atoms, in a ratio of number of mols of bis-imide/number of mols of diamine of between 1.2 and 5, the composition containing up to 15% by weight, relative to the weight of the prepolymer, of red phosphorus in the form of a powder having a mean particle size of less than 200μ.
Inventors
- 👤 Maurice Ducloux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:52
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/02; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2721
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
A heat-curable composition based on a prepolymer obtained by reacting (a) an N,N'-bis-imide of an unsaturated dicarboxylic acid of the formula ##STR5##in which D represents a divalent radical containing a carbon-carbon double bond and A is a divalent radical which possesses at least 2 carbon atoms, and (b) a di-primary diamine of the general formula NH 2 -- B -- NH 2 , in which B represents a divalent radical which does not have more than 30 carbon atoms, in a ratio of number of mols of bis-imide/number of mols of diamine of between 1.2 and 5, wherein the composition contains up to 15% by weight, relative to the weight of the prepolymer, of red phosphorus in the form of a powder having a mean particle size of less than 200μ.
Claim 2
Dependent Claim
131 words
A heat-curable composition based on a prepolymer obtained by reacting (a) an N,N'-bis-imide of an unsaturated dicarboxylic acid of the formula ##STR5##in which D represents a divalent radical containing a carbon-carbon double bond and A is a divalent radical which possesses at least 2 carbon atoms, and (b) a di-primary diamine of the general formula NH 2 -- B -- NH 2 , in which B represents a divalent radical which does not have more than 30 carbon atoms, in a ratio of number of mols of bis-imide/number of mols of diamine of between 1.2 and 5, wherein the composition contains up to 15% by weight, relative to the weight of the prepolymer, of red phosphorus in the form of a powder having a mean particle size of less than 200μ.
Claim 3
Dependent Claim
24 words
A composition according to claim 1, in which the amount of red phosphorus represents from 1 to 8% of the weight of the prepolymer.
Claim 4
Dependent Claim
21 words
A composition according to claim 1, wherein the red phosphorus powder has a mean particle size of from 0.1 to 100μ.
Claim 5
Dependent Claim
133 words
A heat-curable composition based on a prepolymer obtained by reacting (a) a bis-imide of the formula ##STR6##and (b) a diamine of the formula NH 2 -- B -- NH 2 (II), in which formulae the symbol Y represents H, CH 3 or Cl and the symbols A and B, which may be identical or different, represent a phenylene or cyclohexylene radical or a radical ##STR7##where T represents --CH 2 --, --C(CH 3 ) 2 --, --O--, --SO 2 -- or --S--, in a ratio of number of mols of bis-imide/number of mols of diamine of between 1.2 and 5, wherein the composition contains up to 15% by weight, relative to the weight of the prepolymer, of red phosphorus in the form of a powder having a mean particle size of less than 200μ.
Claim 6
Dependent Claim
133 words
A heat-curable composition based on a prepolymer obtained by reacting (a) a bis-imide of the formula ##STR6##and (b) a diamine of the formula NH 2 -- B -- NH 2 (II), in which formulae the symbol Y represents H, CH 3 or Cl and the symbols A and B, which may be identical or different, represent a phenylene or cyclohexylene radical or a radical ##STR7##where T represents --CH 2 --, --C(CH 3 ) 2 --, --O--, --SO 2 -- or --S--, in a ratio of number of mols of bis-imide/number of mols of diamine of between 1.2 and 5, wherein the composition contains up to 15% by weight, relative to the weight of the prepolymer, of red phosphorus in the form of a powder having a mean particle size of less than 200μ.
Claim 7
Dependent Claim
24 words
A composition according to claim 4, in which the amount of red phosphorus represents from 1 to 8% of the weight of the prepolymer.
Claim 8
Dependent Claim
21 words
A composition according to claim 4, wherein the red phosphorous powder has a mean particle size of from 0.1 to 100μ.
References Cited (Backward Citations)
US3330783A
Cited
US3546160A
Cited
US3562223A
Cited
US3663654A
Cited
US3763057A
Cited
US3847861A
Cited
US3878162A
Cited
US3883475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |