US3979345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friable composition and process
Assignee: Vista Chemical Co
•
Filing: 1975-02-10
•
Granted: 1976-09-07
•
Expires: 1995-02-10
Abstract
Abstract Friable compositions suitable for use as extrusion aids in polymeric extrusion formulations are prepared by a process which comprises mixing a paraffinic hydrocarbon wax and calcium salt of a fatty acid while heating to a temperature of at least 160°C and thereafter cooling to recover a solid, glass-like, friable composition, said paraffinic hydrocarbon wax having a drop melting point of at least 110°F, an oil content of not greater than 50 percent by weight and a needle penetration value at 77°F in the range of 1 mm to 20 mm, and said fatty acid being a C 16 -C 24 aliphatic hydrocarbon monocarboxylic acid or mixtures thereof.
Inventors
- 👤 James E. Yates
- 👤 Wilfred M. Pinto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:45
CPC Classifications
C; C08; C08L; C08L91/00; C08L91/06; C08L91/08; C08J; C08J5/00; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C08L101/00; C10; C10G; C10G73/00; C10G73/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
In an improved process for the extrusion processing of a thermo plastic polymer formulation using extrusion aids the improvement comprising utilizing an extrusion aid prepared by mixing a paraffinic hydrocarbon wax and calcium salt of a fatty acid while heating to a temperature of at least 150°C and thereafter cooling to recover a solid, glass-like, friable composition, said paraffinic hydrocarbon wax having a drop melting point of at least 110°F, an oil content of not greater than 50 percent by weight and a needle penetration value at 77°F in the range of 1 mm to 20 mm, and said fatty acid being a C 16 -C 24 aliphatic hydrocarbon monocarboxylic acid or mixtures thereof.
Claim 2
Dependent Claim
114 words
In an improved process for the extrusion processing of a thermo plastic polymer formulation using extrusion aids the improvement comprising utilizing an extrusion aid prepared by mixing a paraffinic hydrocarbon wax and calcium salt of a fatty acid while heating to a temperature of at least 150°C and thereafter cooling to recover a solid, glass-like, friable composition, said paraffinic hydrocarbon wax having a drop melting point of at least 110°F, an oil content of not greater than 50 percent by weight and a needle penetration value at 77°F in the range of 1 mm to 20 mm, and said fatty acid being a C 16 -C 24 aliphatic hydrocarbon monocarboxylic acid or mixtures thereof.
Claim 3
Dependent Claim
12 words
The invention of claim 1 wherein the composition contains additional processing aids.
Claim 4
Dependent Claim
19 words
The invention of claim 1 wherein at least 30 weight percent calcium salt is employed in preparing the composition
Claim 5
Dependent Claim
50 words
The invention of claim 1 wherein the composition is prepared using a paraffinic hydrocarbon wax having a drop melting point of at least 145°F, an oil content of not greater than 20 weight percent, and an needle penetration value at 77°F in the range of 1 mm to 10 mm.
Claim 6
Dependent Claim
39 words
The invention of claim 1 wherein the composition is prepared using a fatty acid selected from the group consisting of palmitic acid, stearic acid, oleic acid, linoleic acid, eicosanic acid, behenic acid, tall oil fatty acid, or mixtures thereof.
References Cited (Backward Citations)
US2716073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |