US4362832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polymer/glass fiber/bis-maleimide molding compositions
Assignee: Rhone Poulenc Industries SA
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Filing: 1981-05-29
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Granted: 1982-12-07
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Expires: 2001-05-29
Abstract
Abstract A molding composition is comprised of (i) a thermoplastic polymer, (ii) glass fibers and (iii) a bis-maleimide, and is useful for the fabrication of a variety of shaped articles, especially for the automotive industry [e.g., radiators, battery casings, fans, etc.].
Inventors
- 👤 Jean-Louis Locatelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:56
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3415; C08K7/00; C08K7/02; C08K7/04; C08K7/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
70 words
A composition of matter comprising (i) a thermoplastic polymer selected from the group consisting of a styrene polymer, nylon-6 and polyethylene terephthalate; (ii) glass fibers in an amount ranging from 1 to 50% by weight based upon the total weight of the thermoplastic polymer and said glass fiber; and (iii) a bis-maleimide in an amount ranging from 0.01 to 10% by weight of the thermoplastic polymer and the glass fibers.
Claim 2
Dependent Claim
70 words
A composition of matter comprising (i) a thermoplastic polymer selected from the group consisting of a styrene polymer, nylon-6 and polyethylene terephthalate; (ii) glass fibers in an amount ranging from 1 to 50% by weight based upon the total weight of the thermoplastic polymer and said glass fiber; and (iii) a bis-maleimide in an amount ranging from 0.01 to 10% by weight of the thermoplastic polymer and the glass fibers.
Claim 3
Dependent Claim
35 words
The composition of matter as defined by claim 1, the amount of glass fibers (ii) ranging from 10 to 40% by weight, and the amount of bis-maleimide (iii) ranging from 0.1 to 5% by weight.
Claim 4
Dependent Claim
38 words
The composition of matter as defined by claim 1, the thermoplastic polymer being selected from the group consisting of styrene homopolymer, styrene/acrylonitrile copolymer, and acrylonitrile/butadiene/styrene terpolymer, said thermoplastic polymer having a molecular weight of from 70,000 to 700,000.
Claim 5
Dependent Claim
24 words
The composition of matter as defined by claim 1, the thermoplastic polymer being polyethylene terephthalate having a molecular weight of from 15,000 to 100,000.
Claim 6
Dependent Claim
23 words
The composition of matter as defined by claim 1, the thermoplastic polymer being nylon-6 having a molecular weight of from 15,000 to 50,000.
Claim 7
Dependent Claim
110 words
The composition of matter as defined by claim 1, the bis-maleimide having the structural formula: ##STR3## wherein Y is independently selected from the group consisting of H, CH 3 and Cl, and R is selected from the group consisting of a linear or branched chain alkylene radical containing up to 12 carbon atoms; cyclohexylene; cyclopentylene; phenylene; naphthylene; a member selected from the group consisting of ##STR4## wherein s is equal to 1, 2 or 3; and a member comprising two phenylene radicals linked together by a member selected from the group consisting of a valence bond, --CH 2 --, --O--, --C(CH 3 ) 2 --, --SO 2 -- and --S--.
Claim 8
Dependent Claim
28 words
The composition of matter as defined by claim 6, wherein the bis-maleimide is selected from the group consisting of N,N'-ethylene-bis-maleimide; N,N'-metaphenylene-bis-maleimide; N,N'-paraphenylene-bis-maleimide; N,N',4,4'-diphenylmethane-bis-maleimide; N,N',4,4'-diphenylether-bis-maleimide; N,N',4,4'-diphenylsulfone-bis-maleimide; N,N",4,4'-diphenylmethane-bis-tetrahydrophthalimide; and N,N',4,4'-diphenylmethane-bis-chloromaleimide.
Claim 9
Dependent Claim
14 words
The composition of matter as defined by claim 1, further comprising a curing catalyst.
Claim 10
Dependent Claim
13 words
A shaped article comprising the composition of matter as defined by claim 1.
Claim 11
Dependent Claim
14 words
A molded shaped article comprising the composition of matter as defined by claim 1.
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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |