US4760126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorine-containing polyamide-acid derivative and polyimide
Assignee: Hitachi Ltd
•
Filing: 1986-09-08
•
Granted: 1988-07-26
•
Expires: 2006-09-08
Abstract
Abstract A polyimide or polyamic acid synthesized from a diamine, which may be fluorinated, and a dianhydride of the following formula: ##STR1## where R f =perfluoroalkylene and Y 1 and Y 2 are independently oxy-carbonyl or thiocarbonyl.
Inventors
- 👤 Shunichi Numata
- 👤 Koji Fujisaki
- 👤 Noriyuki Kinjo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:37
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/1039
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
89 words
A polyamide-acid derivative having repeating units of the formula: ##STR49## wherein Y 1 and Y 2 are independently a divalent group of ##STR50## R f is a perfluoroalkylene group; each X is independently an alkyl group, a fluorinated alkyl group or a halogen atom; R 1 is a hydrogen atom or an alkyl group; R is a diamine residue obtained by removing two amino groups from a diamine; m is zero or an integer of 1 to 3; and n is zero or an integer of 1 to 4.
Claim 2
Dependent Claim
89 words
A polyamide-acid derivative having repeating units of the formula: ##STR49## wherein Y 1 and Y 2 are independently a divalent group of ##STR50## R f is a perfluoroalkylene group; each X is independently an alkyl group, a fluorinated alkyl group or a halogen atom; R 1 is a hydrogen atom or an alkyl group; R is a diamine residue obtained by removing two amino groups from a diamine; m is zero or an integer of 1 to 3; and n is zero or an integer of 1 to 4.
Claim 3
Dependent Claim
19 words
A polyamide-acid derivative according to claim 1, wherein Y 1 and Y 2 in the formula (I) are ##STR51##
Claim 4
Dependent Claim
19 words
A polyamide-acid derivative according to claim 1, which is produced by reacting a diamine with a tetracarboxylic acid derivative.
Claim 5
Dependent Claim
26 words
A polyamide-acid derivative according to claim 1, wherein the R f in the formula (I) is ##STR52## and at least one X is CF 3 .
Claim 6
Dependent Claim
27 words
A polyamide-acid derivative according to claim 3, wherein the diamine is 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane, 2,2-bis[4-(3-trifluoromethyl-4-amino-phenoxy)phenyl]hexafluoropropane or a mixture of at least one of the diamines and another aromatic diamine.
Claim 7
Dependent Claim
29 words
A polyamide-acid derivative according to claim 3, wherein the tetracarboxylic acid derivative is 2,2-bis[4-(3-,4-dicarboxybenzoyloxy)phenyl]hexafluoropropane dianhydride, or a mixture of the tetracarboxylic acid derivative and another aromatic tetracarboxylic acid derivative.
Claim 8
Dependent Claim
23 words
A polyamide-acid derivative according to claim 3, wherein the diamine is p-phenylenediamine or 4,4'-diaminodiphenyl ether and the tetracarboxylic acid derivative is 2,2-bis[4-(3,4-dicarboxybenzoyloxy)phenyl]hexafluoropropane dianhydride.
Claim 9
Dependent Claim
22 words
A polyamide-acid derivative according to claim 3, wherein the diamine is 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane or 2,2-bis[4-(3-trifluoromethyl-4-aminophenoxy)phenyl]hexafluoropropane and the tetracarboxylic acid derivative is 2,2-bis[4-(3-dicarboxybenzoyloxy)-phenyl]hexafluoropropane dianhydride.
Claim 10
Dependent Claim
78 words
A polyimide having repeating units of the formula: ##STR53## wherein Y 1 and Y 2 are independently a divalent group of ##STR54## R f is a perfluoroalkylene group; each X is independently an alkyl group, a fluorinated alkyl group or a halogen atom; R is a diamine residue obtained by removing two amino groups from a diamine; m is zero or an integer of 1 to 3; and n is zero or an integer of 1 to 4.
Claim 11
Dependent Claim
78 words
A polyimide having repeating units of the formula: ##STR53## wherein Y 1 and Y 2 are independently a divalent group of ##STR54## R f is a perfluoroalkylene group; each X is independently an alkyl group, a fluorinated alkyl group or a halogen atom; R is a diamine residue obtained by removing two amino groups from a diamine; m is zero or an integer of 1 to 3; and n is zero or an integer of 1 to 4.
Claim 12
Dependent Claim
20 words
A polyimide according to claim 9, which further includes pyrrolone rings or isoindoloquinazolinedione rings or pyrrolone rings and isoindoloquinazolinedione rings.
Claim 13
Dependent Claim
18 words
A polyimide according to claim 9, wherein Y 1 and Y 2 in the formula (II) are ##STR55##
Claim 14
Dependent Claim
10 words
A polyimide obtained from the polyamide-acid derivative of claim 4.
Claim 15
Dependent Claim
10 words
A polyimide obtained from the polyamide-acid derivative of claim 5.
Claim 16
Dependent Claim
10 words
A polyimide obtained from the polyamide-acid derivative of claim 6.
Claim 17
Dependent Claim
10 words
A polyimide obtained from the polyamide-acid derivative of claim 7.
Claim 18
Dependent Claim
10 words
A polyimide obtained from the polyamide-acid derivative of claim 8.
References Cited (Backward Citations)
DE1770585A1
Cited
GB1239272A
Cited
US3959350A
Cited
US3899517A
Cited
US4111906A
Cited
US4196277A
Cited
US4477648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-26 | 1992-01-25 | 1992-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-26 | 1996-01-25 | 1996-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-26 | 2000-01-25 | 2000-07-26 | $7700.00 | Window Closed / Lapsed |