Patent US4895928A successfully refreshed from Google Patents.
US4895928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt-processable polymeric materials based on 5-t-butylisophthalic
Assignee: BP Corp North America Inc
•
Filing: 1988-06-17
•
Granted: 1990-01-23
•
Expires: 2008-06-17
Abstract
Abstract Melt-processable polyaramide and polyarylate polymers and copolymers are made employing a component containing the 5-t-butylisophthaloyl moiety and aromatic diamines or aromatic diols. The melt processability of these polymers can eliminate expensive processing in making shaped articles. The claimed materials are useful for making fiber, film, laminates, coatings, adhesives and molded objects.
Inventors
- 👤 David J. Fenoglio
- 👤 Edward E. Paschke
- 👤 James R. Stephens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:02
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/32; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/19; Y; Y10; Y10S; Y10S264/00; Y10S264/61
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
51 words
Melt processing an amorphous polyaramide having an intrinsic viscosity measured on a 0.4 wt.% solution in N,N'-dimethylacetamide at 30° C. larger than about 0.5 made from at least one wholly aromatic diamine and a diacyl compound-containing component containing at least twenty mol (20) percent of a compound containing the 5-t-butylisophthaloyl moiety.
Claim 2
Dependent Claim
51 words
Melt processing an amorphous polyaramide having an intrinsic viscosity measured on a 0.4 wt.% solution in N,N'-dimethylacetamide at 30° C. larger than about 0.5 made from at least one wholly aromatic diamine and a diacyl compound-containing component containing at least twenty mol (20) percent of a compound containing the 5-t-butylisophthaloyl moiety.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein said diacyl compound-containing component contains at least fifty (50) mol percent of said compound containing the 5-t-butylisophthaloyl moiety.
Claim 4
Dependent Claim
24 words
The process of claim 1 wherein said diacyl compound-containing component contains at least eighty (80) mole percent of said compound containing the 5-t-butylisophthaloyl moiety.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said diamine contains m-phenylenediamine, p-phenylenediamine, 4,4'-oxybisaniline, 4,4'-thiobisaniline, or 4,4'-sulfonyl-bisaniline.
Claim 6
Dependent Claim
10 words
The process of claim 1 wherein said diamine contains m-phenylenediamine.
Claim 7
Dependent Claim
15 words
The process of claim 2 wherein said diamine contains m-phenylenediamine, p-phenylenediamine, 4,4'-oxybisaniline, 4,4'-thiobisaniline, or 4,4'-sulfonylbisaniline.
Claim 8
Dependent Claim
17 words
The process of claim 3 wherein at least one of said at least one diamine is m-phenylenediamine.
Claim 9
Dependent Claim
49 words
Melt processing an amorphous polyaramide having an intrinsic viscosity measured on a 0.4 wt. % solution in N,N'-dimethylacetamide at 30° C. larger than about 0.5 made from at least m-phenylenediamine and a diacyl compound component containing at least twenty (20) mol percent of a compound containing the 5-t-butylisophthaloyl moiety.
Claim 10
Dependent Claim
49 words
Melt processing an amorphous polyaramide having an intrinsic viscosity measured on a 0.4 wt. % solution in N,N'-dimethylacetamide at 30° C. larger than about 0.5 made from at least m-phenylenediamine and a diacyl compound component containing at least twenty (20) mol percent of a compound containing the 5-t-butylisophthaloyl moiety.
Claim 11
Dependent Claim
11 words
The process of claim 1 in which a fiber is made.
Claim 12
Dependent Claim
12 words
The process of claim 1 in which a molded object is made.
Claim 13
Dependent Claim
11 words
The process of claim 1 in which a film is made.
Claim 14
Dependent Claim
11 words
The process of claim 1 in which a coating is made.
Claim 15
Dependent Claim
11 words
The process of claim 2 in which a fiber is made.
Claim 16
Dependent Claim
12 words
The process of claim 2 in which a molded object is made.
Claim 17
Dependent Claim
11 words
The process of claim 2 in which a film is made.
Claim 18
Dependent Claim
11 words
The process of claim 2 in which a coating is made.
Claim 19
Dependent Claim
11 words
The process of claim 3 in which a fiber is made.
Claim 20
Dependent Claim
12 words
The process of claim 3 in which a molded object is made.
Claim 21
Dependent Claim
11 words
The process of claim 3 in which a film is made.
Claim 22
Dependent Claim
11 words
The process of claim 3 in which a coating is made.
Claim 23
Dependent Claim
11 words
The process of claim 8 in which a fiber is made.
Claim 24
Dependent Claim
12 words
The process of claim 8 in which a molded object is made.
Claim 25
Dependent Claim
11 words
The process of claim 8 in which a film is made.
Claim 26
Dependent Claim
11 words
The process of claim 8 in which a coating is made.
References Cited (Backward Citations)
US2715620A
Cited
US3063966A
Cited
US3408334A
Cited
US3354127A
Cited
US3426001A
Cited
US4042750A
Cited
US4057536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |