US5340390A
Expired / Lapsed
US
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Rheological additive comprising derivatives of castor oil
Assignee: Elementis Specialties Inc
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Filing: 1992-10-29
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Granted: 1994-08-23
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Expires: 2012-10-29
Abstract
Abstract A theological additive especially for liquid organic systems containing a castor-oil derivative with hydroxyl values below that appearing in nature. The additive may also contain clays and other extenders. The preferred derivative is castor wax. The additive largely eliminates the long term problem of seeding exhibited by paints and coatings using castor-oil derived additives while simultaneously providing improved dispersability and viscosity modifying qualities.
Inventors
- 👤 Edward D. Magauran
- 👤 William Reynolds
- 👤 Lawrence DiCarlo
- 👤 Charles A. Cody
- 👤 Araxi Chiavoni
- 👤 Modasser El-Shoubary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
C; C09; C09D; C09D7/00; C09D7/40; C09D7/43; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; Y; Y10; Y10S; Y10S516/00; Y10S516/01
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A rheological additive with improved anti-seeding properties comprising a hydrogenated castor oil derivative produced from castor oil having a hydroxyl value of 160 to 168 by a process comprising the steps performed in either order or simultaneously of a) hydrogenating said castor oil, and b) dehydrating said castor oil so that it has a lowered hydroxyl value.
Claim 2
Dependent Claim
57 words
A rheological additive with improved anti-seeding properties comprising a hydrogenated castor oil derivative produced from castor oil having a hydroxyl value of 160 to 168 by a process comprising the steps performed in either order or simultaneously of a) hydrogenating said castor oil, and b) dehydrating said castor oil so that it has a lowered hydroxyl value.
Claim 3
Dependent Claim
15 words
The theological additive of claim 1 wherein the castor oil derivative is a castor wax.
Claim 4
Dependent Claim
26 words
The theological additive of claim 1 which includes an extender in an amount of about 20% to about 80% of the total weight of the additive.
Claim 5
Dependent Claim
24 words
The rheological additive of claim 3, wherein the extender is selected from the group consisting of bentonite clay, aluminum silicate, calcium carbonate and silica.
Claim 6
Dependent Claim
34 words
A liquid organic system containing a rheological additive in an amount effective to provide rheological properties comprising a hydrogenated dehydrated castor-oil derivative produced from castor oil with a hydroxyl value of 160 to 168.
Claim 7
Dependent Claim
34 words
A liquid organic system containing a rheological additive in an amount effective to provide rheological properties comprising a hydrogenated dehydrated castor-oil derivative produced from castor oil with a hydroxyl value of 160 to 168.
Claim 8
Dependent Claim
12 words
The liquid organic system of claim 5 where said system is paint.
Claim 9
Dependent Claim
30 words
A rheological additive for liquid organic systems consisting of a lowered hydroxyl value castor wax made from hydrogenated castor oil having a hydroxyl value of 160 to 168 by dehydration.
Claim 10
Dependent Claim
30 words
A rheological additive for liquid organic systems consisting of a lowered hydroxyl value castor wax made from hydrogenated castor oil having a hydroxyl value of 160 to 168 by dehydration.
Claim 11
Dependent Claim
60 words
A process of manufacturing a rheological additive for liquid organic systems by producing a castor oil derivative from castor oil with a hydroxyl value of 160 to 168 by a process comprising the steps performed in either order or simultaneously of: a) hydrogenating said castor oil, and b) dehydrating said castor oil so that it has a lowered hydroxyl value.
Claim 12
Dependent Claim
60 words
A process of manufacturing a rheological additive for liquid organic systems by producing a castor oil derivative from castor oil with a hydroxyl value of 160 to 168 by a process comprising the steps performed in either order or simultaneously of: a) hydrogenating said castor oil, and b) dehydrating said castor oil so that it has a lowered hydroxyl value.
Claim 13
Dependent Claim
33 words
A process of providing improved anti-seeding rheological properties to a liquid organic system comprising adding to said system a hydrogenated lowered hydroxyl value castor wax in an amount effective to provide rheological properties.
Claim 14
Dependent Claim
33 words
A process of providing improved anti-seeding rheological properties to a liquid organic system comprising adding to said system a hydrogenated lowered hydroxyl value castor wax in an amount effective to provide rheological properties.
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) | 1997-08-22 | 1998-02-21 | 1998-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-22 | 2002-02-21 | 2002-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-22 | 2006-02-21 | 2006-08-23 | $7700.00 | Window Closed / Lapsed |