US4075172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel aromatic copolyamides prepared from 3,4' diphenylene type diamines, and shaped articles therefrom
Assignee: Teijin Ltd
•
Filing: 1975-12-18
•
Granted: 1978-02-21
•
Expires: 1995-12-18
Abstract
Abstract A novel fiber- or film-forming high-molecular-weight aromatic copolyamide consisting essentially of (1-A) a diamine recurring unit of the formula ##STR1## such as 3,4'-diaminodiphenyl ether or 3,4'-diaminodiphenyl sulfone, (1-B) a diamine recurring unit of the formula --HN--Ar 1 --NH-- such as p-phenylene diamine, and (2) a dicarboxylic acid recurring unit of the formula --OC--Ar 2 --CO-- such as terephthaloyl dichloride, wherein Y 1 , Ar 1 and Ar 2 are as defined in the specification, the total amount of recurring units (1-A) and (1-B) being substantially equimolar to recurring unit (2), and the proportion of recurring unit (1-A) being 7.5 to 40 mole% of the entire recurring units. The copolyamide is well soluble in solvents to give solutions having good flowability and stability that can afford shaped articles with superior thermal stability, fire retardancy and mechanical properties. A process for preparing the copolymer, and a dope of the copolymer are also provided.
Inventors
- 👤 Shuji Ozawa
- 👤 Yasuo Nakagawa
- 👤 Kichiro Matsuda
- 👤 Toshio Nishihara
- 👤 Hideki Yunoki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:34
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/32; D; D01; D01F; D01F6/00; D01F6/78; D01F6/80; D01F6/805
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
192 words
A fiber- or film-forming high-molecular weight aromatic copolyamide consisting essentially of (1-A) a diamine recurring unit of the following formula ##STR72## wherein Y 1 is at least one divalent-moiety selected from the group consisting of --O--, --S--, --SO 2 --, ##STR73## (1-B) a diamine recurring unit of the following formula --HN--AR.sub.1 --NH-- (1-B) wherein Ar 1 represents a phenylene group, a naphthylene group, a biphenylene group or a group of the formula ##STR74## wherein Y 2 has the same definition as Y 1 and is identical to, or different from, Y 1 , all of which groups have their bond chains extending in a coaxial or parallel direction, and (2) a dicarboxylic acid-type recurring unit of the following formula --OC--Ar.sub.2 --CO-- (2) wherein Ar 2 has the same definition as Ar 1 , and is identical to, or different from, Ar 1 , the total mole number of the diamine recurring units of formulae (1-A) and (1-B) being substantially equal to the mole number of the dicarboxylic acid-type recurring unit of formula (2), and the proportion of the diamine recurring unit (1-A) being 7.5 to 40 mole% of the entire recurring units.
Claim 2
Dependent Claim
192 words
A fiber- or film-forming high-molecular weight aromatic copolyamide consisting essentially of (1-A) a diamine recurring unit of the following formula ##STR72## wherein Y 1 is at least one divalent-moiety selected from the group consisting of --O--, --S--, --SO 2 --, ##STR73## (1-B) a diamine recurring unit of the following formula --HN--AR.sub.1 --NH-- (1-B) wherein Ar 1 represents a phenylene group, a naphthylene group, a biphenylene group or a group of the formula ##STR74## wherein Y 2 has the same definition as Y 1 and is identical to, or different from, Y 1 , all of which groups have their bond chains extending in a coaxial or parallel direction, and (2) a dicarboxylic acid-type recurring unit of the following formula --OC--Ar.sub.2 --CO-- (2) wherein Ar 2 has the same definition as Ar 1 , and is identical to, or different from, Ar 1 , the total mole number of the diamine recurring units of formulae (1-A) and (1-B) being substantially equal to the mole number of the dicarboxylic acid-type recurring unit of formula (2), and the proportion of the diamine recurring unit (1-A) being 7.5 to 40 mole% of the entire recurring units.
Claim 3
Dependent Claim
27 words
The aromatic copolyamide of claim 1 wherein the proportion of the diamine recurring unit of formula (1-A) is 10 to 30 moles of the entire recurring units.
Claim 4
Dependent Claim
36 words
The aromatic copolyamide of claim 1 which has an inherent viscosity, as determined at 30° C. for a solution of 0.5 g of polymer dissolved in 100 ml. of 98% sulfuric acid, of 1 to 7.
Claim 5
Dependent Claim
15 words
The aromatic copolyamide of claim 3 which has an inherent viscosity of 1.5 to 5.
Claim 6
Dependent Claim
31 words
The aromatic copolyamide of claim 1 wherein Y 1 in formula (1-A) is at least one divalent moiety selected from the group consisting of --O--, --S--, --SO 2 -- and ##STR75##
Claim 7
Dependent Claim
14 words
The aromatic copolyamide of claim 1 wherein Y 1 in formula (1-A) is --O--.
Claim 8
Dependent Claim
38 words
The aromatic copolyamide of claim 1 wherein --AR 1 -- and --AR 2 -- in formulae (1-B) and (2) each represent a phenylene, naphthylene or biphenylene group having its bond chains extending in a coaxial or parallel direction.
Claim 9
Dependent Claim
24 words
The aromatic copolyamide of claim 1 wherein --Ar 1 -- and --Ar 2 -- in formulae (1-B) and (2) each represent a para-phenylene group.
Claim 10
Dependent Claim
32 words
The aromatic copolyamide of claim 1 wherein Y 1 in formula (1-A) is --O--, and --Ar 1 -- and --Ar 2 -- in formulae (1-B) and (2) each represent a para-phenylene group.
Claim 11
Dependent Claim
13 words
A shaped article consisting essentially of the high-molecular-weight aromatic copolyamide of claim 1.
Claim 12
Dependent Claim
11 words
Fibers consisting essentially of the high-molecular-weight aromatic polyamide of claim 1.
Claim 13
Dependent Claim
11 words
Films consisting essentially of the high-molecular-weight aromatic copolyamide of claim 1.
Claim 14
Dependent Claim
15 words
Fibers according to claim 11 which have a Young's modulus of at least 400 g/denier.
Claim 15
Dependent Claim
40 words
Fibers according to claim 11 composed essentially of the high-molecular-weight copolyamide in which Y 1 in formula (1-A) is --O-- and which have a Young's modulus of at least 400 g/denier and a tensile strength of at least 15 g/denier.
Claim 16
Dependent Claim
28 words
The aromatic copolyamide of claim 1 wherein the proportion of the diamine recurring unit of formula (1-A) is 13 to 25 mole % of the entire recurring units.
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) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |