US4880472A
Expired / Lapsed
US
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Organic pigments coated with metal oxides
Assignee: BASF Corp
•
Filing: 1988-06-06
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Granted: 1989-11-14
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Expires: 2008-06-06
Abstract
Abstract Compositions containing an organic pigment coated with metal oxides, wherein the pigment particles are provided with a tenacious, dense, highly crosslinked coating of silica and/or alumina which is fixed by polycondensation of a silicate and/or aluminate with the free hydroxyl groups of a layer that densely coats the surface of the pigment particles and which consists substantially of partially hydrolyzed compounds of elements of group 4A or 4B of the Periodic Table selected from the group consisting of chelates of formula ##STR1## wherein R is methyl, ethyl, methoxy or ethoxy, R 1 is methyl or ethyl and X is halogen or C 1 -C 4 alkoxy, and M is Ti or Sn, and of esters of formula Q(OR.sup.2).sub.4 (III), wherein Q is an element of group 4A or 4B of the Periodic Table and R 2 is C 1 -C 4 alkyl. Pigment compositions of this kind are distinguished in particular by excellent rheological properties in varnish and printing ink systems, by high gloss of the finishes obtained therewith, and by substantial non-deformation of the plastic mouldings pigmented therewith.
Inventors
- 👤 Philippe Bugnon
- 👤 Arnold Grubenmann
- 👤 Bernhard Medinger
- 👤 Jean Schaefle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:54
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/12; C09B; C09B67/00; C09B67/0001; C09B67/0004; C09B67/0007
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
143 words
A composition containing an organic pigment coated with metal oxides, wherein the pigment particles are provided with a tenacious, dense, highly crosslinked coating of silica and/or alumina which is fixed by polycondensation of a silicate and/or aluminate with the free hydroxyl groups of a layer that densely coats the surface of the pigment particles and which consists substantially of partially hydrolysed compounds of elements of group 4A or 4B of the Periodic Table selected from the group consisting of chelates of formula ##STR4## wherein R is methyl, ethyl, methoxy or ethoxy, R 1 is methyl or ethyl and X is halogen or C 1 -C 4 alkoxy, and M is Ti or Sn, and of esters of formula Q(OR.sup.2).sub.4 (III), wherein Q is an element of group 4A or 4B of the Periodic Table and R 2 is C 1 -C 4 alkyl.
Claim 2
Dependent Claim
143 words
A composition containing an organic pigment coated with metal oxides, wherein the pigment particles are provided with a tenacious, dense, highly crosslinked coating of silica and/or alumina which is fixed by polycondensation of a silicate and/or aluminate with the free hydroxyl groups of a layer that densely coats the surface of the pigment particles and which consists substantially of partially hydrolysed compounds of elements of group 4A or 4B of the Periodic Table selected from the group consisting of chelates of formula ##STR4## wherein R is methyl, ethyl, methoxy or ethoxy, R 1 is methyl or ethyl and X is halogen or C 1 -C 4 alkoxy, and M is Ti or Sn, and of esters of formula Q(OR.sup.2).sub.4 (III), wherein Q is an element of group 4A or 4B of the Periodic Table and R 2 is C 1 -C 4 alkyl.
Claim 3
Dependent Claim
12 words
A composition according to claim 1, wherein the coating consists of silica.
Claim 4
Dependent Claim
19 words
A composition according to claim 1, wherein the coating consists of silica and is obtained by using sodium silicate.
Claim 5
Dependent Claim
12 words
A composition according to claim 1, wherein the coating consists of alumina.
Claim 6
Dependent Claim
22 words
A composition according to claim 1, wherein the coating consists of alumina and is obtained by using sodium aluminate or aluminium sulfate.
Claim 7
Dependent Claim
14 words
A composition according to claim 1, wherein the coating consists of silica and alumina.
Claim 8
Dependent Claim
25 words
A composition according to claim 1 which contains chelates of formula I or II, wherein R is methyl or ethoxy and R 1 is methyl.
Claim 9
Dependent Claim
24 words
A composition according to claim 1 which contains chelates of formula I, wherein M is Ti and X is C 1 -C 4 -alkoxy.
Claim 10
Dependent Claim
20 words
A composition according to claim 1 which contains chelates of formula I, wherein M is Sn and X is chlorine.
Claim 11
Dependent Claim
28 words
A composition according to claim 1 which contains esters of formula III, wherein Q is Si, Ti or Zr and R 2 is ethyl, n-propyl, isopropyl or n-butyl.
Claim 12
Dependent Claim
22 words
A composition according to claim 1, wherein the pigment is selected from the group consisting of diketopyrrolopyrrole, isoindolinone or metal complex pigments.
Claim 13
Dependent Claim
36 words
A composition according to claim 1, wherein the compound of formula I, II or III is present in an amount of 1 to 15% by weight, calculated in each case as oxide, based on the pigment.
Claim 14
Dependent Claim
24 words
A composition according to claim 1 which contains silica and/or alumina in an amount of 0.5 to 50% by weight, based on the pigment.
Claim 15
Dependent Claim
105 words
A composition containing an organic pigment, the particles of which are coated with a dense layer which consists substantially of partially hydrolysed organic compounds of elements of group 4A or 4B of the Periodic Table selected from the group consisting of chelates of formula ##STR5## wherein R is methyl, ethyl, methoxy or ethoxy, R 1 is methyl or ethyl and X is halogen or C 1 -C 4 alkoxy, and M is Ti or Sn, and of esters of formula Q(OR.sup.2).sub.4 (III), wherein Q is an element of group 4A or 4B of the Periodic Table and R 2 is C 1 -C 4 alkyl.
Claim 16
Dependent Claim
105 words
A composition containing an organic pigment, the particles of which are coated with a dense layer which consists substantially of partially hydrolysed organic compounds of elements of group 4A or 4B of the Periodic Table selected from the group consisting of chelates of formula ##STR5## wherein R is methyl, ethyl, methoxy or ethoxy, R 1 is methyl or ethyl and X is halogen or C 1 -C 4 alkoxy, and M is Ti or Sn, and of esters of formula Q(OR.sup.2).sub.4 (III), wherein Q is an element of group 4A or 4B of the Periodic Table and R 2 is C 1 -C 4 alkyl.
Claim 17
Dependent Claim
12 words
High molecular organic material containing a composition as claimed in claim 1.
Claim 18
Dependent Claim
12 words
High molecular organic material containing a composition as claimed in claim 14.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-11-13 | 1993-05-15 | 1993-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-13 | 1997-05-15 | 1997-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-13 | 2001-05-15 | 2001-11-14 | $7700.00 | Window Closed / Lapsed |