US3942998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molybdate orange pigment with improved thermal stability
Assignee: HEUBACH Inc A DE CORP
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Filing: 1974-11-06
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Granted: 1976-03-09
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Expires: 1994-11-06
Abstract
Abstract Molybdate orange pigment treated with from 0.1 to 30% of a boron compound. The boron-treated molybdate orange pigments when coated with dense, amorphous silica are particularly useful for coloring high temperature molding plastics.
Inventors
- 👤 James Francis Higgins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:22
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/0003; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/32; C01P2006/37; C01P2006/60; C01P2006/80
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
74 words
In a process for preparing molybdate orange pigment in aqueous medium by contacting an aqueous solution containing soluble salts of molybdate, sulfate and chromate with a salt of lead to form an aqueous slurry of precipitated pigment and applying porous silica and alumina to said precipitated pigment, wherein the improvement comprises adding from 0.1 to 30% by weight of a soluble boron compound, calculated as B 2 O 3 , to said aqueous medium.
Claim 2
Dependent Claim
74 words
In a process for preparing molybdate orange pigment in aqueous medium by contacting an aqueous solution containing soluble salts of molybdate, sulfate and chromate with a salt of lead to form an aqueous slurry of precipitated pigment and applying porous silica and alumina to said precipitated pigment, wherein the improvement comprises adding from 0.1 to 30% by weight of a soluble boron compound, calculated as B 2 O 3 , to said aqueous medium.
Claim 3
Dependent Claim
30 words
Process for preparing molybdate orange pigment according to claim 1 wherein said boron compound is a water-soluble inorganic oxygen-containing boron compound which forms boric acid upon contact with aqueous media.
Claim 4
Dependent Claim
30 words
Process for preparing molybdate orange pigment according to claim 2 wherein said boron compound is selected from the group consisting of boric oxide, boric acid and acidified alkali metal borates.
Claim 5
Dependent Claim
29 words
Process for preparing molybdate orange pigment according to claim 2 wherein said boron compound is added to said aqueous solution in an amount from 0.1 to 1% by weight.
Claim 6
Dependent Claim
17 words
Process for preparing molybdate orange pigment according to claim 4 wherein said boron compound is boric oxide.
Claim 7
Dependent Claim
24 words
Process for preparing molybdate orange pigment according to claim 4 wherein a coating of dense, amorphous silica is applied to said molybdate orange pigment.
Claim 8
Dependent Claim
32 words
Process for preparing molybdate orange pigment according to claim 2 wherein said boron compound is added to said aqueous slurry of precipitated pigment in an amount from 1 to 30% by weight.
Claim 9
Dependent Claim
17 words
Process for preparing molybdate orange pigment according to claim 7 wherein said boron compound is boric oxide.
Claim 10
Dependent Claim
24 words
Process for preparing molybdate orange pigment according to claim 7 wherein a coating of dense, amorphous silica is applied to said molybdate orange pigment.
Claim 11
Dependent Claim
11 words
Molybdate orange pigment prepared according to the process of claim 1.
Claim 12
Dependent Claim
11 words
Molybdate orange pigment prepared according to the process of claim 6.
Claim 13
Dependent Claim
11 words
Molybdate orange pigment prepared according to the process of claim 9.
Claim 14
Dependent Claim
24 words
Molybdate orange pigment containing porous silica and alumina and from 0.015% to 0.1% by weight of boron, calculated as B 2 O 3 .
Claim 15
Dependent Claim
24 words
Molybdate orange pigment containing porous silica and alumina and from 0.015% to 0.1% by weight of boron, calculated as B 2 O 3 .
Claim 16
Dependent Claim
35 words
Molybdate orange pigment according to claim 13 wherein the total amount of porous silica, calculated as SiO 2 , and alumina, calculated as Al 2 O 3 , is from 0.5 to 3.0% by weight.
Claim 17
Dependent Claim
23 words
Molybdate orange pigment according to claim 14 having a coating of dense, amorphous silica in an amount from 2 to 40% by weight.
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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |