Patent US2355457A successfully refreshed from Google Patents.
US4344799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Readily dispersible TiO2 pigment
Assignee: Kerr-Mcgee Pigments & Co KG GmbH
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Filing: 1980-11-03
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Granted: 1982-08-17
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Expires: 2000-11-03
Abstract
Abstract An inorganically after-treated TiO2 pigment with a coating of hydrophobicizing and hydrophilicizing organic substances, which pigment comprises more than about 95% by weight of TiO2, shows a loss on annealing of less than about 0.8% (after subtraction of the carbon content) and has a grindometer value smaller than about 30, corresponding to a value of more than about 5.6 on the Hegman scale, is produced by micronizing a mixture of an inorganically after-treated TiO2 pigment, an untreated TiO2 pigment and hydrophobicizing and hydrophilicizing organic substances, the after-treated pigment being employed in about 1 to 40% by weight of total TiO2 pigment and the hydrophobicing and hydrophilicizing substances being employed in about 0.3 to 5% by weight of TiO2 pigment. The pigments are readily dispersible which simplifies their use in pigmenting lacquers, plastics and paper.
Inventors
- 👤 Klaus Kohler
- 👤 Peter Woditsch
- 👤 Hilmar Rieck
- 👤 Fritz Rodi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:04
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/36; C09C1/3692; C09C3/00; C09C3/04; C09C3/041; C09C3/06; C09C3/063; C09C3/08; C09C3/12; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
89 words
An inorganically after-treated TiO 2 pigment with a coating of hyrophobicizing and hydrophilicizing organic substances, which pigment comprises more than about 95% by weight of TiO 2 , shows a loss on annealing of less than about 0.8% (after subtraction of the carbon content) and has a grindometer value smaller than about 30, corresponding to a value of more than about 5.6 on the Hegman scale, the hydrophobicizing organic substance being an organic silicon compound and/or an organic phosphorus compound and the hydrophilicizing organic compound being an amino alcohol.
Claim 2
Dependent Claim
89 words
An inorganically after-treated TiO 2 pigment with a coating of hyrophobicizing and hydrophilicizing organic substances, which pigment comprises more than about 95% by weight of TiO 2 , shows a loss on annealing of less than about 0.8% (after subtraction of the carbon content) and has a grindometer value smaller than about 30, corresponding to a value of more than about 5.6 on the Hegman scale, the hydrophobicizing organic substance being an organic silicon compound and/or an organic phosphorus compound and the hydrophilicizing organic compound being an amino alcohol.
Claim 3
Dependent Claim
16 words
A TiO 2 pigment according to claim 1, wherein the organic silicon compound is a polysiloxane.
Claim 4
Dependent Claim
18 words
A TiO 2 pigment according to claim 1 wherein the organic phosphorus compound is a phosphoric acid diester.
Claim 5
Dependent Claim
68 words
A TiO 2 pigment according to claim 1, produced by micronizing a mixture of an inorganically after-treated TiO 2 pigment, an untreated TiO 2 pigment and hydrophobicizing and hydrophilicizing organic substances, the after-treated pigment being employed in about 1 to 40% by weight of total TiO 2 pigment and the hydrophobicizing and hydrophilicizing substances being employed in about 0.3 to 5% by weight of total TiO 2 pigment.
Claim 6
Dependent Claim
44 words
A TiO 2 pigment according to claim 4, wherein the inorganically after-treated TiO 2 pigment is a TiO 2 pigment which has been after-treated with about 1 to 20% by weight based on TiO 2 , of an inorganic metal oxide, hydroxide and/or phosphate.
Claim 7
Dependent Claim
74 words
A TiO 2 pigment according to claim 4, wherein the inorganically after-treated TiO 2 pigment is a TiO 2 pigment which has been after-treated with about 3 to 15% by weight of total TiO 2 pigment and the hydrophobizing and hydrophilicizing substances being employed in about 0.5 to 1.5% by weight of total TiO 2 pigment, the hydrophobicizing substances comprising polysiloxane or a phosphoric acid diester and the hydrophilicizing substance comprising an amino alcohol.
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) | 1985-08-16 | 1986-02-15 | 1986-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-16 | 1990-02-15 | 1990-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-16 | 1994-02-15 | 1994-08-17 | $7700.00 | Window Closed / Lapsed |