US4820790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain-extended poly(aryl ether ketones)
Assignee: Syensqo Specialty Polymers USA LLC
•
Filing: 1987-03-13
•
Granted: 1989-04-11
•
Expires: 2007-03-13
Abstract
Abstract Described herein are novel crystalline chain-extended polymers containing segments of crystalline poly(aryl ether ketones). These poly(aryl ether ketones) are easy to prepare and display excellent toughness, fabricability, and very good high temperature and solvent resistance.
Inventors
- 👤 Paul A. Winslow
- 👤 Markus Matzner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:20
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/48; C08G61/00; C08G61/12; C08G61/127; C08G65/38; C08G65/40; C08G65/4012
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
45 words
A tough, linear chain-extended poly(aryl ether ketone) polymer of the formula ##STR56## wherein Ar, Ar' and Ar 4 are divalent aromatic radicals, n is at least three, and y is one or greater; with the proviso that Ar 4 cannot be the residue of 4,4'-dihydroxybenzophenone.
Claim 2
Dependent Claim
45 words
A tough, linear chain-extended poly(aryl ether ketone) polymer of the formula ##STR56## wherein Ar, Ar' and Ar 4 are divalent aromatic radicals, n is at least three, and y is one or greater; with the proviso that Ar 4 cannot be the residue of 4,4'-dihydroxybenzophenone.
Claim 3
Dependent Claim
27 words
The chain-extended poly(aryl ether ketone) of claim 1 wherein Ar 4 is selected from the following: ##STR57## where m is an integer of from 1 to 5.
Claim 4
Dependent Claim
18 words
The chain-extended poly(aryl ether ketone) of claims 1 or 2 wherein Ar' is selected from the following: ##STR58##
Claim 5
Dependent Claim
16 words
The chain-extended poly(aryl ether ketone) of claims 1 wherein Ar is selected from the following: ##STR59##
Claim 6
Dependent Claim
42 words
The chain-extended (poly(aryl ether ketone) of claim 1 having the formula ##STR60## wherein n is three or greater, Y is one or greater, and Ar 4 is selected from the following: ##STR61## where m is an integer of from 1 to 5.
References Cited (Backward Citations)
FR2393835A1
Cited
US4320224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |