US3883486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-resistant polymers based on polyamines and oligomers possessing imide groups
Assignee: Rhone Poulenc SA
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Filing: 1972-06-21
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Granted: 1975-05-13
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Expires: 1992-06-21
Abstract
Abstract IN WHICH X REPRESENTS A NUMBER FROM 0.1 TO ABOUT 2, R represents a divalent hydrocarbon radical with 1 to 8 carbon atoms, which is derived from an aldehyde or a ketone of the general formula: A heat resistant or heat-curable polymer composition obtained by reacting, between 50*C. and 350*C., (a) an oligomer having the average general formula:
Inventors
- 👤 Michael Bargain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:23
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4042; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/121; C08G73/122; C08L; C08L63/00; C08L67/00; C08L67/06; Y; Y10; Y10S; Y10S525/00; Y10S525/929
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
27 words
A HEAT RESISTANT IS HEATCURABLE POLYMER CONSISTING ESSENTIALLY OF A POLYMERIC COMPOSITION OBTAINED BY REACTING, BETWEEN 50* AND 35:*C, A. AN OLIGOMER HAVING THE AVERAGE GENERAL FORMULA:
Claim 2
Dependent Claim
27 words
A HEAT RESISTANT IS HEATCURABLE POLYMER CONSISTING ESSENTIALLY OF A POLYMERIC COMPOSITION OBTAINED BY REACTING, BETWEEN 50* AND 35:*C, A. AN OLIGOMER HAVING THE AVERAGE GENERAL FORMULA:
Claim 3
Dependent Claim
28 words
The composition according to claim 1 in which the oligomer supplies 1.2 to 5T radicals possessing a polymerisable carbon-carbon double bond per -NH2 group supplied by the polyamine.
Claim 4
Dependent Claim
27 words
The composition according to claim 1 in which the polyamine is a diprimary diamine of the formula: H2N-E-NH2 in which E is as defined in claim 1.
Claim 5
Dependent Claim
43 words
The composition according to claim 1 in which the polyamine is a mixture of a diprimary diamine and an amine having an average of more than two amino groups per molecule, in an amount up to 90 percent by weight of the diamine.
Claim 6
Dependent Claim
18 words
The composition according to claim 1 in which the polyamine consists of an oligomer of the average formula:
Claim 7
Dependent Claim
13 words
The composition according to claim 1 in which R represents a CH2 radical.
Claim 8
Dependent Claim
20 words
The composition according to claim 1 in which at least 60 percent of the T radicals are -CH CH- radicals.
Claim 9
Dependent Claim
15 words
The composition according to claim 7 in which the remainder of the T radicals are
Claim 10
Dependent Claim
22 words
The composition according to claim 1 in which at least 80 percent of the T radicals contain a polymerisable carbon-carbon double bond.
Claim 11
Dependent Claim
65 words
The composition according to claim 1 in which a prepolymer is prepared by heating the oligomer and polyamine together at a temperature from about 80* to about 200*C. until a homogeneous liquid or paste-like mixture is obtained, or in a polar solvent at a temperature from about 50* to about 180*C., and the prepolymer is then cured by subsequent heating at between 150* and 300*C.
Claim 12
Dependent Claim
39 words
The composition according to claim 1 in which, before curing, an aromatic compound possessing 2 to 4 benzene rings, which does not sublime at atmospheric pressure up to 250*C. and which has a boiLing point above 250*C. is incorporated.
Claim 13
Dependent Claim
36 words
The composition according to claim 10 in which an aromatic tricarboxylic or tetracarboxylic acid anhydride is added to the prepolymer, before curing, in an amount from about 1 to 5 percent by weight of the prepolymer.
Claim 14
Dependent Claim
30 words
The composition according to claim 1 in which a monomer containing 5 - 40 percent by weight of the weight of the mixture of reagents of at least one polymerisable
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |