US4247338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal chromate pigment compositions
Assignee: BASF Corp
•
Filing: 1978-11-21
•
Granted: 1981-01-27
•
Expires: 1998-11-21
Abstract
Abstract Metal chromate and particularly lead chromate pigment compositions exhibiting low dusting characteristics and improved heat stability in thermoplastics are described. The pigment compositions consist essentially of a metal chromate-containing pigment and the combination of certain fatty acid salts with normally liquid ester plasticizers. Lead chromate pigment compositions containing the combination of a zinc salt of a fatty acid with benzoate, phthalate, stearate or phosphate plasticizers are particularly preferred and exhibit reduced dusting as well as outstanding advantages in heat stability not realizable with either the fatty acid salt or plasticizer alone or by silica encapsulation of the pigment particles.
Inventors
- 👤 Bernard G. Ziobrowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:08
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/006; C08; C08K; C08K9/00; C08K9/04; C09C1/00; C09C1/04; C09C1/08; C09C1/14; C09C1/20; C09C1/34; C09C3/06; C09C3/063; C09C3/08; C01; C01P; C01P2006/00; C01P2006/20; C01P2006/32; C01P2006/37
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
A metal chromate-containing pigment composition in the form of a fine powder having particles of a size less than about 100 microns, improved heat stability in plastics and reduced tendency to dusting said composition consisting essentially of, by weight, from 50 to 85% of a metal chromate-containing pigment selected from the group consisting of chrome yellow, basic lead chromate, lead sulfo-chromate, molybdate orange and molybdate red; from 7.5 to 30% of at least one water-insoluble zinc, aluminum, magnesium or calcium salt of a fatty acid containing at least 12 carbon atoms; and from 7.5 to 20% of at least one normally liquid ester plasticizer selected from the group consisting of esters of fatty acids and saturated monohydric alcohols, diesters of dicarboxylic acids and saturated monohydric alcohols, fatty acid esters of polyols, benzoic acid esters of polyols and phosphoric acid esters.
Claim 2
Dependent Claim
140 words
A metal chromate-containing pigment composition in the form of a fine powder having particles of a size less than about 100 microns, improved heat stability in plastics and reduced tendency to dusting said composition consisting essentially of, by weight, from 50 to 85% of a metal chromate-containing pigment selected from the group consisting of chrome yellow, basic lead chromate, lead sulfo-chromate, molybdate orange and molybdate red; from 7.5 to 30% of at least one water-insoluble zinc, aluminum, magnesium or calcium salt of a fatty acid containing at least 12 carbon atoms; and from 7.5 to 20% of at least one normally liquid ester plasticizer selected from the group consisting of esters of fatty acids and saturated monohydric alcohols, diesters of dicarboxylic acids and saturated monohydric alcohols, fatty acid esters of polyols, benzoic acid esters of polyols and phosphoric acid esters.
Claim 3
Dependent Claim
28 words
A pigment composition according to claim 1 wherein the metal chromate-containing pigment is selected from the group consisting of chrome yellow, lead sulfo-chromate, molybdate orange and molybdate red.
Claim 4
Dependent Claim
36 words
A pigment composition according to claim 1 wherein the salt of the fatty acid is selected from group consisting of the zinc, magnesium or calcium salt of a fatty acid containing 12 to 24 carbon atoms.
Claim 5
Dependent Claim
48 words
A pigment composition according to claim 3 wherein the salt of the fatty acid is selected from the group consisting of the zinc, magnesium or calcium salt of a fatty acid selected from the group consisting of lauric, myristic, palmitic, stearic, arachidic and behenic acid and mixtures thereof.
Claim 6
Dependent Claim
45 words
A pigment composition according to claim 1 wherein the ester plasticizer is selected from the group consisting of esters of fatty acids and saturated monohydric alcohols, diesters of dicarboxylic acids and saturated monohydric alcohols, fatty acid esters of polyols and benzoic acid esters of polyols.
Claim 7
Dependent Claim
28 words
A pigment composition according to claim 2 wherein the salt of the fatty acid is selected from the group consisting of zinc stearate, magnesium stearate, and calcium stearate.
Claim 8
Dependent Claim
29 words
A pigment composition according to claim 6 wherein the ester plasticizer is selected from the group consisting of diethylene glycol dibenzoate, dioctylphthalate, tributyl phosphate, isopropyl myristate, and dioctyl adipate.
Claim 9
Dependent Claim
30 words
A pigment composition according to claim 1 wherein the metal chromate-containing pigment have on their surfaces a substantially continuous coating of dense amorphous silica or dense amorphous silica and alumina.
Claim 10
Dependent Claim
149 words
A process for producing a metal chromate-containing composition in the form of a fine powder having particles of a size less than about 100 microns, improved heat stability in plastics and a reduced tendency to dusting, said process comprising intimately blending dry particles of a metal chromate-containing pigment selected from the group consisting of chrome yellow, basic lead chromate, lead sulfo-chromate, molybdate orange and molybdate red with, based on the total weight of the composition, from 7.5 to 30% of at least one water-insoluble zinc, aluminum, magnesium or calcium salt of a fatty acid containing at least 12 carbon atoms; and from 7.5 to 20% of at least one normally liquid ester plasticizer selected from the group consisting of esters of fatty acids and saturated monohydric alcohols, diesters of dicarboxylic acids and saturated monohydric alcohols, fatty acid esters of polyols, benzoic acid esters of polyols and phosphoric acid esters.
Claim 11
Dependent Claim
149 words
A process for producing a metal chromate-containing composition in the form of a fine powder having particles of a size less than about 100 microns, improved heat stability in plastics and a reduced tendency to dusting, said process comprising intimately blending dry particles of a metal chromate-containing pigment selected from the group consisting of chrome yellow, basic lead chromate, lead sulfo-chromate, molybdate orange and molybdate red with, based on the total weight of the composition, from 7.5 to 30% of at least one water-insoluble zinc, aluminum, magnesium or calcium salt of a fatty acid containing at least 12 carbon atoms; and from 7.5 to 20% of at least one normally liquid ester plasticizer selected from the group consisting of esters of fatty acids and saturated monohydric alcohols, diesters of dicarboxylic acids and saturated monohydric alcohols, fatty acid esters of polyols, benzoic acid esters of polyols and phosphoric acid esters.
References Cited (Backward Citations)
US2184539A
Cited
US3470007A
Cited
DE2425238A1
Cited
GB1449055A
Cited
US3909488A
Cited
US3973982A
Cited
US4115143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |