Patent EP0712082A1 successfully refreshed from Google Patents.
US4777237A
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US
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Polymer from (1) bis-imide, (2) allyloxy-phenyl maleimide and (3) diamine
Assignee: Rhone Poulenc Specialites Chimiques
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Filing: 1986-11-13
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Granted: 1988-10-11
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Expires: 2006-11-13
Abstract
Abstract Novel, heat-stable imido polymers, well adopted, e.g., as coating or molding resins, comprise the polymerizates of (a) at least one N,N'-bismaleimide, (b) at least one diprimary diamine, and (c) at least one N-(meth)-allyloxyphenylmaleimide.
Inventors
- 👤 Rene Dien
- 👤 Michel Rakoutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:17
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/12; C08G73/126; C08F; C08F216/00; C08F216/12; C08F216/14; C08F216/1458; C08F222/00; C08F222/36; C08F222/40; C08G73/121; C08G73/122; C08G73/125; C08G73/127
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
143 words
An imido polymer comprising the polymerizate of: (a) at least one N,N'-bisimide having the formula: ##STR11## in which Y is H, CH 3 or Cl, A is cyclohexylene, phenylene, 4-methyl-1,3-phenylene, 2-methyl-1,3-phenylene, 5-methyl-1,3-phenylene, 2,5-diethyl-3-methyl-1,4-phenylene, or a radical of the formula: ##STR12## in which T is a single valency bond or T is a group: ##STR13## and X is a hydrogen atom or a methyl, ethyl or isopropyl radical; (b) at least one diprimary diamine having the formula: H.sub.2 N--B--NH.sub.2 (II) in which B is one of the divalent radicals A, with the proviso that A and B present in the same monomer are identical or different; and (c) at least one copolymerizable unsaturated comonomer having the formula: ##STR14## in which the allyloxy or methallyloxy radical is in the ortho-, meta- or para-position relative to the benzene ring carbon atom bonded to the nitrogen atom.
Claim 2
Dependent Claim
143 words
An imido polymer comprising the polymerizate of: (a) at least one N,N'-bisimide having the formula: ##STR11## in which Y is H, CH 3 or Cl, A is cyclohexylene, phenylene, 4-methyl-1,3-phenylene, 2-methyl-1,3-phenylene, 5-methyl-1,3-phenylene, 2,5-diethyl-3-methyl-1,4-phenylene, or a radical of the formula: ##STR12## in which T is a single valency bond or T is a group: ##STR13## and X is a hydrogen atom or a methyl, ethyl or isopropyl radical; (b) at least one diprimary diamine having the formula: H.sub.2 N--B--NH.sub.2 (II) in which B is one of the divalent radicals A, with the proviso that A and B present in the same monomer are identical or different; and (c) at least one copolymerizable unsaturated comonomer having the formula: ##STR14## in which the allyloxy or methallyloxy radical is in the ortho-, meta- or para-position relative to the benzene ring carbon atom bonded to the nitrogen atom.
Claim 3
Dependent Claim
62 words
The imido polymer as defined by claim 1, wherein the amounts of N,N'-bisimide(s) (a), of diamine(s) (b) and of monomer(s) (c) are such that the ratio r 1 : ##EQU5## ranges from 1.2/1 to 10/1, and the number of imide groups contributed by the monomer(s) (c) constitutes up to 50% of the total number of imide groups contributed by the reactants (a)+(c).
Claim 4
Dependent Claim
20 words
The cured insoluble polymer produced from the polymerizate defined by claim 1 exhibiting no appreciable softening below the decompositoin temperature.
Claim 5
Dependent Claim
28 words
The imido polymer as defined by claim 1, in thermosetting prepolymer state, soluble in polar organic solvents, and having a softening point at a temperature below 200° C.
Claim 6
Dependent Claim
39 words
A process for the preparation of the cured imido polymer as defined by claim 3, comprising directly heating of a mixture of (a), (b) and (c) defined by claim 1 at a temperature of from 50° to 250° C.
Claim 7
Dependent Claim
43 words
The process as defined by claim 5, comprising first heating said mixture of comonomers to a temperature of from 50° C. to 180° C. to prepolymerize same, and thence curing the resulting prepolymer at a temperature of from 150° C. to 250° C.
Claim 8
Dependent Claim
43 words
A process for the preparation of the thermosetting prepolymer as defined by claim 4, comprising directly heating a mixture of (a), (b) and (c) at a temperature of from 50° C. to 180° C. until a homogeneous liquid or pasty product is obtained.
Claim 9
Dependent Claim
25 words
The process as defined by claim 7, comprising prepolymerizing said bisimide(s) (a) and diamine(s) (b), and thence heating the resulting prepolymer with the comonomer(s) (c).
Claim 10
Dependent Claim
25 words
The process as defined by claim 7, comprising prepolymerizing said diamine(s) (b) and comonomer(s) (c), and thence heating the resulting prepolymer with the bisimide(s) (a).
Claim 11
Dependent Claim
12 words
A shaped article comprising the imido polymer as defined by claim 1.
Claim 12
Dependent Claim
12 words
A shaped article comprising the imido polymer as defined by claim 3.
Claim 13
Dependent Claim
12 words
A shaped article comprising the imido polymer as defined by claim 4.
References Cited (Backward Citations)
US4035345A
Cited
US4401777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-11 | 1992-04-11 | 1992-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |