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US3933745A
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Imide copolymers possessing hydroxyl groups
Assignee: Rhone Poulenc SA
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Filing: 1972-10-24
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Granted: 1976-01-20
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Expires: 1992-10-24
Abstract
Abstract Imide copolymers consisting essentially of at least ##SPC1##of recurring units of the formula ##SPC2## Together with recurring units of the formula: In which M represents an aliphatic, aromatic, carbocyclic or heterocyclic divalent radical and R represents a tetravalent aromatic radical are provided having special utility as adhesives for polyimide and polyimide-amide films.
Inventors
- 👤 Michel Bargain
- 👤 Maurice Ducloux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:18
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/28; B32B27/281; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; B32B27/34; B32B7/00; B32B7/04; B32B7/12; C08G73/1042; C08G73/1067; C08G73/1075; C08G73/1082; B32B2307/00; B32B2307/30; B32B2307/306; B32B2377/00; B32B2379/00; B32B2379/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
41 words
An adhesive imide copolymer consisting essentially of recurring units of the formula: ##SPC12## and at least 20% of recurring units of the formula; ##SPC13## in which M represents an aliphatic or aromatic divalent radical and R represents a tetravalent aromatic radical.
Claim 2
Dependent Claim
41 words
An adhesive imide copolymer consisting essentially of recurring units of the formula: ##SPC12## and at least 20% of recurring units of the formula; ##SPC13## in which M represents an aliphatic or aromatic divalent radical and R represents a tetravalent aromatic radical.
Claim 3
Dependent Claim
18 words
A copolymer according to claim 1 in which the recurring units of formula (II) have the formula: ##SPC14##
Claim 4
Dependent Claim
18 words
A copolymer according to claim 1 in which the recurring units of formula (II) have the formula: ##SPC15##
Claim 5
Dependent Claim
18 words
A copolymer according to claim 1 in which the recurring units of formula (II) have the formula: ##SPC16##
Claim 6
Dependent Claim
40 words
A copolymer according to claim 1 in which M represents a phenylene group, or two or three phenylene groups linked together by an --O--, --S-- or --SO 2 -- group, or an alkylene group with 1 to 3 carbon atoms.
Claim 7
Dependent Claim
13 words
A copolymer according to claim 5 in which M represents a ##SPC17## radical.
Claim 8
Dependent Claim
45 words
An adhesive imide copolymer consisting essentially of: 40 to 70% of recurring units of the formula: ##SPC18## and 60 to 30% of recurring units of the formula: ##SPC19## in which M represents an aliphatic or aromatic divalent radical and R represents a tetravalent aromatic radical.
Claim 9
Dependent Claim
45 words
An adhesive imide copolymer consisting essentially of: 40 to 70% of recurring units of the formula: ##SPC18## and 60 to 30% of recurring units of the formula: ##SPC19## in which M represents an aliphatic or aromatic divalent radical and R represents a tetravalent aromatic radical.
Claim 10
Dependent Claim
104 words
Process for producing an adhesive imide copolymer as defined in claim 1 which comprises reacting, at a temperature between about 100° and 400°C., a diprimary diamine of the formula: NH.sub.2 -- M -- NH.sub.2 in which M is as defined in claim 1, with a mixture of imidisable derivatives selected from acids, anhydrides, diacid-diesters and tetraesters, at least 20 mole % of which is a derivative of a phenylene-bis-(4-hydroxymethylenephthalic) acid of the formula: ##SPC20## the remainder of the mixture being an imidisable derivative of an aromatic tetracid of the formula: ##EQU2## in which R is as defined in claim 1, either simultaneously or separately.
Claim 11
Dependent Claim
36 words
Process according to claim 8, which is carried out in a solvent until the inherent viscosity is between about 0.15 and 2 dl/g (measured at a concentration of 0.5 g per 100 cm 3 at 25°C).
Claim 12
Dependent Claim
16 words
An adhesive composition which comprises a solution of an imide copolymer as defined in claim 1.
References Cited (Backward Citations)
US3609123A
Cited
US3793291A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |