US3843615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyester molding compositions
Assignee: Hoechst AG
•
Filing: 1972-05-15
•
Granted: 1974-10-22
•
Expires: 1992-05-15
Abstract
Abstract Thermoplastic molding compositions containing a small amount of a cross-linked polyester as nucleating agent can be processed into high quality shaped articles having a high degree of crystallization.
Inventors
- 👤 W Herwig
- 👤 R Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:59
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
132 words
A THERMOSPLASTIC POLYSTER MOLDING COMPOSITION CONSISTING OF A PHYSICAL MIXTURE OF A. A LINEAR SATURATED POLYSTER OF ONE OR MORE AROMATIC DICARBOXYLIC ACIDS WHICH MAY CONTAINS UP TO 10 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE DICARBOXYLIC ACIDS, OF ALIPHATIC DISCARBOXYLIC ACIDS WITH SATURATED ALIPHATIC OR CYLOALIPHATIC DIOLS, AND B. 0.05 TO 2 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE LINEAR SATURATED POLYSTER (A), OF A CROSS-LINKED SATURATED POLYSTER~F (1) TEREPHATIC ACID OR AN ESTER-FORMING DERIVATIVE THEREOF, (2) A DIOL HAVING FROM 2 TO10 CARBON ATOMS AND (3) 0.01 TO 3 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE CROSS-LINKED SATURATED POLYSTER, OF AN ORGANIC CROSS-LINKED POLYFUNCTIONAL COMPOUND HAVING AT LEAST THREE FUNCTIONAL GROUPS, ALL OF SAID FUNCTIONAL GROUP BEING SELECTED FROM HYDROXYL AND CARBOXYL GROUPS.
Claim 2
Dependent Claim
132 words
A THERMOSPLASTIC POLYSTER MOLDING COMPOSITION CONSISTING OF A PHYSICAL MIXTURE OF A. A LINEAR SATURATED POLYSTER OF ONE OR MORE AROMATIC DICARBOXYLIC ACIDS WHICH MAY CONTAINS UP TO 10 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE DICARBOXYLIC ACIDS, OF ALIPHATIC DISCARBOXYLIC ACIDS WITH SATURATED ALIPHATIC OR CYLOALIPHATIC DIOLS, AND B. 0.05 TO 2 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE LINEAR SATURATED POLYSTER (A), OF A CROSS-LINKED SATURATED POLYSTER~F (1) TEREPHATIC ACID OR AN ESTER-FORMING DERIVATIVE THEREOF, (2) A DIOL HAVING FROM 2 TO10 CARBON ATOMS AND (3) 0.01 TO 3 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE CROSS-LINKED SATURATED POLYSTER, OF AN ORGANIC CROSS-LINKED POLYFUNCTIONAL COMPOUND HAVING AT LEAST THREE FUNCTIONAL GROUPS, ALL OF SAID FUNCTIONAL GROUP BEING SELECTED FROM HYDROXYL AND CARBOXYL GROUPS.
Claim 3
Dependent Claim
13 words
The polyester molding composition of claim 1, wherein component a) is polyethylene terephthalate.
Claim 4
Dependent Claim
13 words
The polyester molding composition of claim 1, wherein component a) is polycyclohexane-1,4-dimethylol terephthalate.
Claim 5
Dependent Claim
44 words
The polyester molding composition of claim 1, wherein component a) is a modified polyethylene terephthalate containing as structural units, besides terephthalic acid, up to 10 percent by weight, calculated on the total amount of dicarboxylic acids, of isophthalic acid, napthalene-2,6-dicarboxylic acid or adipic acid.
Claim 6
Dependent Claim
24 words
The polyester molding composition of claim 1, wherein component a) is a modified polyethylene terephthalate which contains, besides ethylene glycol, neopentyl glycol or butanediol-1,4.
Claim 7
Dependent Claim
50 words
The polyester molding composition of claim 1, wherein component a) has a reduced specific viscosity of from 0.9 to 2.0 dl/g, measured at 25*C with a solution of 1 gram of polyester in 100 milliliters of a mixture of phenol and tetrachloroethane in a weight ratio of 3 : 2.
Claim 8
Dependent Claim
22 words
The polyester molding composition of claim 6, wherein the component a) has a reduced specific viscosity of from 1.0 to 1.6 dl/g.
Claim 9
Dependent Claim
37 words
The thermoplastic molding composition of claim 1, wherein the cross-linking polyfunctional compound in component b) is selected from the group consisting of 1,1,4,4-tetramethylol cyclohexane pyromellitic acid, pentaerythritol, trimethylol propane, trimesic acid, cyclopentane tetracarboxylic acid and its anhydride.
Claim 10
Dependent Claim
90 words
Method of nucleating a linear saturated polyester which comprises physically mixing therewith 0.05 to 2 percent by weight, based on the weight of the linear polyester, of a cross-linked saturated polyester of a. terephthalic acid or an ester-forming derivative thereof, b. a diol having from 2 to 10 carbon atoms and c. 0.01 to 3 percent by weight, based on the weight of the cross-linked polyester, of an organic cross-linking polyfunctional compound having at least three functional groups, all of said functional groups being selected from hydroxyl and carboxyl groups.
Claim 11
Dependent Claim
90 words
Method of nucleating a linear saturated polyester which comprises physically mixing therewith 0.05 to 2 percent by weight, based on the weight of the linear polyester, of a cross-linked saturated polyester of a. terephthalic acid or an ester-forming derivative thereof, b. a diol having from 2 to 10 carbon atoms and c. 0.01 to 3 percent by weight, based on the weight of the cross-linked polyester, of an organic cross-linking polyfunctional compound having at least three functional groups, all of said functional groups being selected from hydroxyl and carboxyl groups.
Claim 12
Dependent Claim
12 words
Injection molded articles made from the thermoplastic molding composition of claim 1.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |