Patent US3986995A successfully refreshed from Google Patents.
US3986995A
Expired / Lapsed
US
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Friable compositions and process for producing same
Assignee: Vista Chemical Co
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Filing: 1975-02-10
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Granted: 1976-10-19
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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, calcium hydroxide and 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 (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
- 👤 Paul H. Washecheck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:34
CPC Classifications
C; C08; C08L; C08L101/00; C08J; C08J5/00; C08K; C08K3/00; C08K3/18; C08K3/20; C08K3/22; C08K5/00; C08K5/04; C08K5/09; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08L91/00; C08L91/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
In an improved process for the extrusion processing of a thermoplastic polymer formulation using extrusion aids which are added to said thermoplastic polymer formulation prior to carrying out said extrusion, the improvement comprising utilizing an extrusion aid which is friable at ambient temperatures, prepared by mixing a paraffinic hydrocarbon wax, calcium hydroxide and 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 (77° F) in the range of from 1 millimeter to 20 millimeters, and said fatty acid being a C 16 -C 24 aliphatic hydrocarbon monocarboxylic acid or mixtures thereof.
Claim 2
Dependent Claim
135 words
In an improved process for the extrusion processing of a thermoplastic polymer formulation using extrusion aids which are added to said thermoplastic polymer formulation prior to carrying out said extrusion, the improvement comprising utilizing an extrusion aid which is friable at ambient temperatures, prepared by mixing a paraffinic hydrocarbon wax, calcium hydroxide and 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 (77° F) in the range of from 1 millimeter to 20 millimeters, and said fatty acid being a C 16 -C 24 aliphatic hydrocarbon monocarboxylic acid or mixtures thereof.
Claim 3
Dependent Claim
22 words
The invention of claim 1 wherein the calcium hydroxide is mixed with the paraffinic hydrocarbon wax prior to adding the fatty acid.
Claim 4
Dependent Claim
23 words
The invention of claim 1 wherein the mol ratio of calcium hydroxide to fatty acid is in the range of 0.5/1 to 1/1.
Claim 5
Dependent Claim
13 words
The invention of claim 3 wherein the mol ratio is 0.55/1 to 0.65/1.
Claim 6
Dependent Claim
22 words
The invention of claim 3 wherein the weight ratio of wax to fatty acid is in the range of 0.5/1 to 2/1.
Claim 7
Dependent Claim
18 words
The invention of claim 4 wherein the weight ratio of wax to fatty acid is 0.9/1 to 1/1.
Claim 8
Dependent Claim
47 words
The invention of claim 1 wherein the paraffinic hydrocarbon wax has a drop melting point of at least 145° F, an oil content of not greater than 20 weight percent and a needle penetration value at 77° F in the range of 1 mm to 10 mm.
Claim 9
Dependent Claim
29 words
The invention of claim 7 wherein the fatty acid is palmitic acid, stearic acid, oleic acid, linoleic acid, tall oil fatty acid, eicosanic acid, behenic acid, or mixtures thereof.
Claim 10
Dependent Claim
13 words
The invention of claim 1 wherein a mixture of fatty acids is employed.
Claim 11
Dependent Claim
25 words
The invention of claim 9 wherein the mixture of fatty acids contains up to 15 weight percent of a C 14 aliphatic hydrocarbon monocarboxylic acid.
Claim 12
Dependent Claim
26 words
The invention of claim 1 wherein the composition is prepared by mixing the fatty acid with the paraffinic hydrocarbon wax prior to adding the calcium hydroxide.
References Cited (Backward Citations)
US2404896A
Cited
US3470006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |