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US4566908A
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US
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Azoic pigments having a silica core
Assignee: Kyocera Mita Industrial Co Ltd
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Filing: 1984-02-24
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Granted: 1986-01-28
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Expires: 2004-02-24
Abstract
Abstract An azoic pigment having a silica core comprising a core of a fine powder of silica having a particle diameter of not more than 10 microns and a coating of a mono- or polyazoic dye chemically bound to the surface of the silica core through an aminosilane coupling agent.
Inventors
- 👤 Kaname Nakatani
- 👤 Nobuhiro Miyakawa
- 👤 Teruaki Higashiguchi
- 👤 Syoji Nakagama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:53
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/10; C09B69/106; C09B67/00; C09B67/0033; G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0906; G03G9/091; G03G9/097; G03G9/09708; G03G9/09716
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
49 words
An azoic pigment having a silica core comprising a core of a fine powder of silica having a particle diameter of not more than 10 microns and a coating of a mono- or polyazoic dye chemically bound to the surface of the silica core through an aminosilane coupling agent.
Claim 2
Dependent Claim
49 words
An azoic pigment having a silica core comprising a core of a fine powder of silica having a particle diameter of not more than 10 microns and a coating of a mono- or polyazoic dye chemically bound to the surface of the silica core through an aminosilane coupling agent.
Claim 3
Dependent Claim
19 words
The azoic pigment of claim 1 wherein the silica has a particle diameter of not more than 5 microns.
Claim 4
Dependent Claim
22 words
The azoic pigment of claim 1 wherein the silica powder has a surface OH density of at least 0.01/100 Å 2 .
Claim 5
Dependent Claim
78 words
The azoic pigment of claim 1 wherein the aminosilane coupling agent is selected from compounds represented by the following formula (R.sup.2 O).sub.m.sup.R.sub.n.sup.3 Si--R.sup.1 --NH.sub.2 (II) wherein R 1 represents a lower alkylene group which may contain --NH-- or --NHCO-- in the chain, R 2 represents a lower alkyl group, R 3 represents a hydrogen atom or a lower alkyl group, m is an integer of 1 to 3, and n is 0, 1 or 2 provided that m+n=3.
Claim 6
Dependent Claim
15 words
The azoic pigment of claim 4 wherein the aminosilane coupling agent is selected from ##STR116##
Claim 7
Dependent Claim
63 words
The azoic pigment of claim 1 which has a basic structure represented by the following formula ##STR117## wherein ○SP represents the fine powder of silica, R 1 represents a lower alkylene group which may contain --NH-- or --NHCO-- in the chain; Z represents ##STR118## D represents a residue of a mono- or polyazoic dye; and l is a number of at least 1.
Claim 8
Dependent Claim
52 words
The azoic pigment of claim 6 wherein D is selected from ##STR119## wherein Ar 1 , Ar 3 , Ar 4 , Ar 5 and Ar 6 , independently from each other, represent a phenylene or naphthylene group which may be substituted, and Ar 2 represents a group of a coupling component.
Claim 9
Dependent Claim
61 words
A process for producing the azoic pigment of claim 1, which comprises treating a fine powder of silica having a particle diameter of not more than 10 microns with an aminosilane coupling agent to introduce an amino group into the surface of the fine silica powder, and thereafter binding a residue of a mono- or polyazoic dye to the amino group.
Claim 10
Dependent Claim
22 words
The azoic pigment of claim 1 wherein the silica powder has a surface OH density of at least 1/100 Å 2 .
Claim 11
Dependent Claim
66 words
The azoic pigment of claim 1 which has a basic structure represented by the following formula ##STR120## wherein ○SP represents the fine powder of silica, R 1 represents a lower alkylene groups which may contain --NH-- or --NHCO-- in the chain; Z represents an amino bridging member; D represents a residue of a mono- or polyazoic dye; and l is a number of at least 1.
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) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |