US4316002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding compositions comprised of polyimide/N-vinylpyrrolidone prepolymer and epoxy resin
Assignee: BASF Corp
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Filing: 1979-10-23
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Granted: 1982-02-16
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Expires: 1999-10-23
Abstract
Abstract Novel thermosetting compositions, including a polyimide/N-vinylpyrrolidone prepolymer, optionally comprising an unsaturated polyester, and an epoxy resin, are well adapted for the molding of a variety of useful shaped articles.
Inventors
- 👤 Robert Cassat
- 👤 Gerard Guillot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:24
CPC Classifications
C; C08; C08L; C08L63/00; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4042; C08G59/44; C08G59/442; C08G59/46; C08G59/48; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31721; Y10T428/31786
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
99 words
A composition of matter comprising (i) a prepolymer consisting essentially of a reaction product obtained by reacting (a) a polyimide having the structural formula: ##STR6## wherein D is selected from the group consisting of ##STR7## wherein Y is selected from the group consisting of H, CH 3 , and Cl, m is 0, 1 or 2, R is an organic radical of valency n, containing from 2 to 50 carbon atoms, and n is a number having an average value between 2 and 5, and (b) N-vinyl-2-pyrrolidone; and (ii) an epoxy resin having at least one 1,2 epoxy group.
Claim 2
Dependent Claim
99 words
A composition of matter comprising (i) a prepolymer consisting essentially of a reaction product obtained by reacting (a) a polyimide having the structural formula: ##STR6## wherein D is selected from the group consisting of ##STR7## wherein Y is selected from the group consisting of H, CH 3 , and Cl, m is 0, 1 or 2, R is an organic radical of valency n, containing from 2 to 50 carbon atoms, and n is a number having an average value between 2 and 5, and (b) N-vinyl-2-pyrrolidone; and (ii) an epoxy resin having at least one 1,2 epoxy group.
Claim 3
Dependent Claim
19 words
The composition of matter as defined by claim 1, further comprising (iii) a hardening agent for the epoxy resin.
Claim 4
Dependent Claim
31 words
The composition of matter as defined by claim 2, wherein the prepolymer (i) comprises from 5 to 95% by weight of the total amount of prepolymer (i) and epoxy resin (ii).
Claim 5
Dependent Claim
31 words
The composition of matter as defined by claim 3, wherein the prepolymer (i) comprises from 20 to 80% by weight of the total amount of prepolymer (i) and epoxy resin (ii).
Claim 6
Dependent Claim
61 words
The composition of matter as defined by claim 3, wherein the polyimide (a) has the structural formula: ##STR8## wherein L is a divalent radical selected from the group consisting of cyclohexylene, phenylene and radicals having the structural formula: ##STR9## wherein T is selected from the group consisting of --CH 2 --, --C(CH 3 ) 2 --, --O-- and --SO 2 --.
Claim 7
Dependent Claim
15 words
The composition of matter as defined by claim 5, wherein the polyimide (a) is N,N',4,4'-diphenylmethane-bis-maleimide.
Claim 8
Dependent Claim
17 words
The composition of matter as defined by claim 5, further comprising a reinforcing amount of a filler.
Claim 9
Dependent Claim
25 words
The composition of matter as defined by claim 5, wherein the epoxy resin (ii) is the glycidyl ethers of a poly(hydroxyphenyl)alkane or phenol- formaldehyde resin.
Claim 10
Dependent Claim
17 words
The composition of matter as defined by claim 2, wherein said composition is in a hardened state.
Claim 11
Dependent Claim
13 words
A shaped article comprising the composition of matter as defined by claim 2.
Claim 12
Dependent Claim
13 words
A shaped article comprising the composition of matter as defined by claim 9.
Claim 13
Dependent Claim
17 words
The composition of matter as defined by claim 2 wherein said hardening agent comprises BF 3 .
References Cited (Backward Citations)
US4035345A
Cited
US4005154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |