US4640974A
Expired / Lapsed
US
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Polycyanoaryl ether films and fibers
Assignee: Idemitsu Kosan Co Ltd
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Filing: 1986-02-18
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Granted: 1987-02-03
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Expires: 2006-02-18
Abstract
Abstract Polycyanoaryl ether stretched films and fibers prepared from polycyanoaryl ethers containing specific repeating units and number-average molecular weights or reduced viscosities by stretching molded films or melt-spinned fibers, said films and fibers having superior heat resistance and mechanical strength.
Inventors
- 👤 Shigeru Matsuo
- 👤 Tomoyoshi Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:27
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G65/4006; D; D01; D01F; D01F6/00; D01F6/58; D01F6/66; C08G2650/00; C08G2650/62; C08G2650/64; C08J2371/00
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
127 words
A polycyanoaryl ether stretched film which comprises a molded film being composed of (A) a polycyanoaryl ether containing not less than 80 molar % of a repeating unit represented by the formula ##STR25## and having a number-average molecular weight of 25,000-65,000, (B) a polycyanoaryl ether containing not less than 50 molar % of a repeating unit represented by the formula ##STR26## and having a reduced viscosity of 0.4-2.0 dl/g at 60° C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol or (C) a polycyanoaryl ether containing not less than 80 molar % of a repeating unit represented by the formula CN ##STR27## and having a number-average molecular weight of 30,000-90,000, and having been stretched at a drawing ratio of not less than 1.5 times.
Claim 2
Dependent Claim
127 words
A polycyanoaryl ether stretched film which comprises a molded film being composed of (A) a polycyanoaryl ether containing not less than 80 molar % of a repeating unit represented by the formula ##STR25## and having a number-average molecular weight of 25,000-65,000, (B) a polycyanoaryl ether containing not less than 50 molar % of a repeating unit represented by the formula ##STR26## and having a reduced viscosity of 0.4-2.0 dl/g at 60° C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol or (C) a polycyanoaryl ether containing not less than 80 molar % of a repeating unit represented by the formula CN ##STR27## and having a number-average molecular weight of 30,000-90,000, and having been stretched at a drawing ratio of not less than 1.5 times.
Claim 3
Dependent Claim
50 words
A polycyanoaryl ether stretched film as claimed in claim 1 wherein said polycyanoaryl ether (A) is a copolymer containing said repeating unit (I) and not more than 20 molar % of at least one of repeating units represented by ##STR28## wherein Ar is a divalent aryl group other than ##STR29##
Claim 4
Dependent Claim
50 words
A polycyanoaryl ether stretched film as claimed in claim 1 wherein said polycyanoaryl ether (B) is a copolymer containing said repeating unit (I') and less than 50 molar of at least one of repeating units represented by the formula ##STR30## wherein Ar' is a divalent aryl group other than ##STR31##
Claim 5
Dependent Claim
50 words
A polycyanoaryl ether stretched film as claimed in claim 1 wherein said polycyanoaryl ether (C) is a copolymer containing said repeating unit (I") and not more than 20 molar % of at least one of repeating units represented by ##STR32## wherein Ar' is a divalent aryl group other than ##STR33##
Claim 6
Dependent Claim
23 words
A polycyanoaryl ether film as claimed in claim 1 wherein said polycyanoaryl ether (A) has a number-average molecular weight of 35,000 to 60,000.
Claim 7
Dependent Claim
21 words
A polycyanoaryl ether film as claimed in claim 1 wherein said polycyanoaryl ether (B) has a reduced viscosity of 0.6-1.5 dl/g.
Claim 8
Dependent Claim
21 words
A polycyanoaryl ether film as claimed in claim 1 wherein said polycyanoaryl ether (C) has a number-average molecular weight of 35,000-60,000.
Claim 9
Dependent Claim
127 words
A polycyanoaryl ether fiber which comprises a melt-spinned fiber being composed of (D) a polycyanoaryl ether containing not less than 80 molar % of a repeating unit represented by the formula ##STR34## and having a number-average molecular weight of 20,000 to 70,000, (B) a polycyanoaryl ether containing not less than 50 molar % of a repeating unit represented by the formula ##STR35## and having a reduced viscosity of 0.4-2.0 dl/g at 60° C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol or (E) a polycyanoaryl ether containing not less than 80 molar % of a repeating unit represented by the formula ##STR36## and having a number-average molecular weight of 30,000-80,000, and having been stretched at a temperature below a melting temperature of said fiber.
Claim 10
Dependent Claim
127 words
A polycyanoaryl ether fiber which comprises a melt-spinned fiber being composed of (D) a polycyanoaryl ether containing not less than 80 molar % of a repeating unit represented by the formula ##STR34## and having a number-average molecular weight of 20,000 to 70,000, (B) a polycyanoaryl ether containing not less than 50 molar % of a repeating unit represented by the formula ##STR35## and having a reduced viscosity of 0.4-2.0 dl/g at 60° C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol or (E) a polycyanoaryl ether containing not less than 80 molar % of a repeating unit represented by the formula ##STR36## and having a number-average molecular weight of 30,000-80,000, and having been stretched at a temperature below a melting temperature of said fiber.
Claim 11
Dependent Claim
51 words
A polycyanoaryl ether fiber as claimed in claim 8 wherein said polycyanoaryl ether (D) is a copolymer containing said repeating unit (I) and not more than 20 molar % of at least one of repeating units represented by the formula ##STR37## wherein Ar is a divalent aryl group other than ##STR38##
Claim 12
Dependent Claim
49 words
A polycyanoaryl ether fiber as claimed in claim 8 wherein said polycyanoaryl ether (B) is a copolymer containing said repeating unit (I') and less than 50 molar of at least one of repeating units represented by the formula ##STR39## wherein Ar' is a divalent aryl group other than ##STR40##
Claim 13
Dependent Claim
51 words
A polycyanoaryl ether fiber as claimed in claim 8 wherein said polycyanoaryl ether (E) is a copolymer containing said repeating unit (I") and not more than 20 molar % of at least one of repeating units represented by the formula ##STR41## wherein Ar' is a divalent aryl group other than ##STR42##
Claim 14
Dependent Claim
23 words
A polycyanoaryl ether fiber as claimed in claim 8 wherein said polycyanoaryl ether (D) has a number-average molecular weight of 25,000 to 65,000.
Claim 15
Dependent Claim
21 words
A polycyanoaryl ether fiber as claimed in claim 8 wherein said polycyanoaryl ether (B) has a reduced viscosity of 0.6-1.5 dl/g.
Claim 16
Dependent Claim
23 words
A polycyanoaryl ether fiber as claimed in claim 8 wherein said polycyanoaryl ether (E) has a number-average molecular weight of 20,000 to 80,000.
Claim 17
Dependent Claim
19 words
A polycyanoaryl ether fiber as claimed in claim 8 wherein said drawing ratio is not less than 2 times.
References Cited (Backward Citations)
US3730946A
Cited
JPS60163924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |