US3910859A
Expired / Lapsed
US
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Heat-stable polyimide resin from bis-imide, polyamine and alazine
Assignee: Rhone Poulenc SA
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Filing: 1974-03-05
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Granted: 1975-10-07
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Expires: 1994-03-05
Abstract
Abstract New heat-stable resins are provided having good mechanical and electrical properties combined with chemical inertness at temperatures of 200* to 300*C, which resins are resins of a three-dimensional polyimide which is obtained by reacting, at between 50* and 350*C, a bisimide of the general formula: in which Y denotes H, CH3 or Cl, and A represents a divalent organic radical possessing at least two carbon atoms, a polyamine of the general formula:
Inventors
- 👤 Michel Bargain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:56
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/121; C08G73/122; C08L; C08L79/00; C08L79/04; C08L79/08; C08L79/085; Y; Y10; Y10S; Y10S525/00; Y10S525/929
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
36 words
A HEAT-STABLE RESIN CONSISTING ESSENTIALLY OF THE THREE-DIMENSIONAL POLYIMIDE OBTAINED BY REACTING AT BETWEEN ABOUT 50* AND 350*C. AT LEAST ONR REACTANT FROM EACH OF THE FOLLOWING FOUR GROUPS: I. A BIS-IMIDE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
36 words
A HEAT-STABLE RESIN CONSISTING ESSENTIALLY OF THE THREE-DIMENSIONAL POLYIMIDE OBTAINED BY REACTING AT BETWEEN ABOUT 50* AND 350*C. AT LEAST ONR REACTANT FROM EACH OF THE FOLLOWING FOUR GROUPS: I. A BIS-IMIDE OF THE GENERAL FORMULA:
Claim 3
Dependent Claim
51 words
The resin according to claim 1 in which the polyamine is a di-primary diamine of the general formula: NH2 - E - NH2 in which E represents a linear or branched alkylene radical having less than 13 carbon atoms, a phenylene or cyclohexylene radical, or one of the radicals of formulae:
Claim 4
Dependent Claim
16 words
The resin according to claim 1 in which at least one of A and E represents:
Claim 5
Dependent Claim
13 words
The resin according to claim 1 in which G denotes a phenyl radical.
Claim 6
Dependent Claim
8 words
The resin according to claim 1 in which
Claim 7
Dependent Claim
71 words
The resin according to claim 1 which is obtained by preparing a shapable, heat-curable prepolymer by heating between about 50* and 180*C. a mixture of the bis-imide, polyamine and alazine in bulk until a homogeneous liquid is obtained, or in a polar solvent, adding the anhydride in an amount from 1 to 5% of the weight of the prepolymer, and then curing by subsequent heating at between about 150* and 300*C.
Claim 8
Dependent Claim
60 words
The resin according to claim 1 which is obtained by preparing a shapable, heat-curable prepolymer (PP) from the alazine and a shapable, heat-curable prepolymer (P1) obtained from the bis-imide and the polyamine, adding the anhydride in an amount from 1 to 5% of the weight of the prepolymer, and then curing by subsequent heating at between about 150* and 300*C.
Claim 9
Dependent Claim
63 words
The resin according to claim 1 which is obtained by preparing a shapable, heat-curable prepolymer (PP) from the polyamine and from a shapable, heat-curable prepolymer (P2) obtained from the alazine and the bis-imide, adding the anhydride in an amount from 1 to 5% of the weight of the prepolymer, and then curing the prepolymer by subsequent heating at between about 150* and 300*C.
Claim 10
Dependent Claim
80 words
The resin according to claim 1 which is obtained by preparing a shapable, heat-curable prepolymer (PP) by mixing a shapable, heat-curable prepolymer (PP1) obtained from a part of the bis-imide and from the polyamine with a shapable, heat-curable prepolymer (PP2) obtained from the alazine and the remainder of the bis-imide, adding the anhydride in an amount from 1 to 5% of the weight of the prepolymer, and then curing the prepolymer by subsequent heating at between about 150* and 300*C.
Claim 11
Dependent Claim
14 words
The resin according to claim 1 in which the anhydride has the general formula:
Claim 12
Dependent Claim
19 words
The resin according to claim 10 in which the anhydride is trimellitic anhydride or the anhydride of benzophenone-3,4,4''-tricarboxylic acid.
Claim 13
Dependent Claim
14 words
The resin according to claim 1 in which the anhydride has the general formula:
Claim 14
Dependent Claim
20 words
The resin according to claim 12 in which the anhydride is azophthalic anhydride or the dianhydride of m- or p-bis(3,4-dicarboxybenzoyl)-benzene.
Claim 15
Dependent Claim
13 words
The resin according to claim 1 in which the anhydride is pyromellitic anhydride.
Claim 16
Dependent Claim
57 words
The resin according to claim 1 in which before curing up to about 10% by weight relative to the weight of (i), (ii) and (iii) of an aromatic compound possessing 2 to 4 benzene rings which iS not sublimable under atmospheric pressure up to about 250*C. and which has a boiling point above about 250*C. is incorporated.
Claim 17
Dependent Claim
14 words
The resin according to claim 15 in which the aromatic compound is a terphenyl.
Claim 18
Dependent Claim
42 words
A shapable, heat-curable thermosetting prepolymer composition obtained by heating between about 50* and 180*C. a mixture of a bis-imide, polyamine, alazine and anhydride, all as defined in claim 1, in the amounts specified in claim 1 until a homogeneous liquid is obtained.
Claim 19
Dependent Claim
38 words
A shapable, heat-curable prepolymer composition according to claim 17 obtained by heating a mixture of a bis-imide, polyamine, alazine and anhydride all as defined in claim 1, in the amounts specified in claim 1, in a polar solvent.
Claim 20
Dependent Claim
52 words
A shapable, heat-curable prepolymer composition obtained from an alazine as defined in claim 1, a shapable, heat-curable prepolymer (P1) obtained from bis-imide and polyamine as defined in claim 1, and up to 5% by weight relative to the weight of the alazine and prepolymer of an anhydride as defined in claim 1.
Claim 21
Dependent Claim
52 words
A shapable, heat-curable prepolymer composition obtained from a polyamine as defined in claim 1, a shapable, heat-curable prepolymer (P2) obtained from alazine and bis-imide as defined in claim 1, and up to 5% by weight relative to the weight of the polyamine and prepolymer of an anhydride as defined in claim 1.
Claim 22
Dependent Claim
76 words
A shapable, heat-curable prepolymer composition obtained by mixing a shapable, heat-curable prepolymer (PP1) obtained from a part of the bis-imide and from the polyamine, as defined in claim 1, with a shapable, heat-curable prepolymer (PP2) obtained from the remainder of the bis-imide and from an alazine as defined in claim 1, and up to 5% by weight relative to the weight of the prepolymer (PP1) and prepolymer (PP2) of an anhydride as defined in claim 1.
Claim 23
Dependent Claim
23 words
The resin according to claim 1 in which G denotes a phenyl radical substituted by a fluorine, chlorine, methyl, methoxy, or nitro group.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |