Patent US4501844A successfully refreshed from Google Patents.
US4501844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamides with talc as crystallization promoter
Assignee: Pharmacia and Upjohn Co
•
Filing: 1983-12-05
•
Granted: 1985-02-26
•
Expires: 2003-12-05
Abstract
Abstract Disclosed are injection moldable, rapidly crystallization compositions comprising (A) a linear polyamide selected from the series poly(4,4'-methylenediphenylene azelamide to dodecanediamide); and (B) an amount sufficient to promote the crystallization of the linear polyamide, of a material selected from the group of (i) talc, (ii) sodium benzenesulfonate, (iii) a polyethylene ionomer, (iv) a methacrylated butadiene-styrene, and (v) a multi-phase composite interpolymer. The compositions crystallize rapidly from the molten state which allows for economically attractive molding procedures including fiber production and the production of aromatic-aliphatic polyamides having a combination of excellent properties.
Inventors
- 👤 Augustin T. Chen
- 👤 David J. Goldwasser
- 👤 Kemal Onder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:40
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
A composition comprising a blend of, a linear polyamide selected from the group consisting of poly(4,4'-methylenediphenylene azelamide), poly(4,4'-methylenediphenylene sebacamide), poly(4,4'-methylenediphenylene undecanediamide), poly(4,4'-methylenediphenylene dodecanediamide), and mixtures thereof, said polyamide characterized in that it has been prepared by the reaction of 4,4'methylenebis (phenyl isocyanate) and the corresponding dicarboxylic acid or by the reaction of 4,4'-methylenebis(aniline) and the corresponding dicarboxylic acid dihalide, said polyamide being further characterized by an inherent viscosity of from about 0.5 to about 1.5 determined as a 0.5 percent by weight solution in N-methylpyrrolidone containing about 4 percent by weight lithium chloride at 30° C; and talc, said talc being present in an amount at least sufficient to promote the crystallization of said linear polyamide (A).
Claim 2
Dependent Claim
117 words
A composition comprising a blend of, a linear polyamide selected from the group consisting of poly(4,4'-methylenediphenylene azelamide), poly(4,4'-methylenediphenylene sebacamide), poly(4,4'-methylenediphenylene undecanediamide), poly(4,4'-methylenediphenylene dodecanediamide), and mixtures thereof, said polyamide characterized in that it has been prepared by the reaction of 4,4'methylenebis (phenyl isocyanate) and the corresponding dicarboxylic acid or by the reaction of 4,4'-methylenebis(aniline) and the corresponding dicarboxylic acid dihalide, said polyamide being further characterized by an inherent viscosity of from about 0.5 to about 1.5 determined as a 0.5 percent by weight solution in N-methylpyrrolidone containing about 4 percent by weight lithium chloride at 30° C; and talc, said talc being present in an amount at least sufficient to promote the crystallization of said linear polyamide (A).
Claim 3
Dependent Claim
60 words
A composition according to claim 1 wherein said polyamide (A) is prepared by the reaction of 4,4'-methylenebis(phenyl isocyanate) and the corrresponding dicarboxylic acid, said polyamide being further characterized by an inherent viscosity of from about 0.7 to about 1.1 determined as a 0.5 percent by weight solution in N-methylpyrrolidone containing about 4 percent by weight lithium chloride at 30° C.
Claim 4
Dependent Claim
28 words
A composition according to claim 2 wherein said talc is present in a range of from about 0.1 to about 5 percent by weight of (A) plus (B).
Claim 5
Dependent Claim
11 words
A composition according to claim 3 wherein (A) is poly(4,4'-methylenediphenylene azelamide).
Claim 6
Dependent Claim
11 words
A composition according to claim 3 wherein (A) is poly(4,4'-methylenediphenylene dodecanediamide).
Claim 7
Dependent Claim
27 words
A composition according to claim 3 containing talc in an amount of up to about 55 percent by weight based on total weight of (A) plus (B).
Claim 8
Dependent Claim
11 words
A composition according to claim 6 wherein (A) is poly(4,4'-methylenediphenylene azelamide).
Claim 9
Dependent Claim
18 words
A composition according to claim 3 which also comprises up to about 55 percent by weight of fiberglass.
Claim 10
Dependent Claim
11 words
A composition according to claim 8 wherein (A) is poly(4,4'-methlenediphenylene azelamide).
Claim 11
Dependent Claim
11 words
A fiber prepared from a composition in accordance with claim 1.
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) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |