US5244469A
Expired / Lapsed
US
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Process for preparation of black coloring materials and application thereof: chitosan treated with black extract of lithospermum root
Assignee: Hayashibara Seibutsu Kagaku Kenkyujo KK
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Filing: 1991-12-13
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Granted: 1993-09-14
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Expires: 2011-12-13
Abstract
Abstract A novel black coloring material is obtained by treating a chitosan with a dyestuff of the lithospermum root. If a water-insoluble chitosan is used as the chitosan, a finely divided black coloring material is obtained, and if a gelatinous chitosan salt is used as the chitosan, a gelatinous black coloring material is obtained. If a water-soluble chitosan, chitosan oligosaccharide or D-glucosamine, or a salt thereof is used as the chitosan, a liquid black coloring material is obtained. If a powdery polymeric substance is treated with such a black coloring material, a polymer-based black coloring material is obtained, and if a fiber is dyed with such a black coloring material, the fiber is dyed to a black color having a low lightness.
Inventors
- 👤 Susumu Shimoyama
- 👤 Yasuko Noda
- 👤 Ujo Maeda
- 👤 Tasuku Shimoyama
- 👤 Kunio Kataoka
- 👤 Eiichi Eto
- 👤 Mieko Goto
- 👤 Yoshio Hara
- 👤 Satoru Shimoyama
- 👤 Keiko Maeda
- 👤 Kazumi Konya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:49
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/006; C09B67/0061; C09B61/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
25 words
A process for the preparation of a black coloring agent, which comprises treating a chitosan with an extract of lithospermum root in an organic solvent.
Claim 2
Dependent Claim
25 words
A process for the preparation of a black coloring agent, which comprises treating a chitosan with an extract of lithospermum root in an organic solvent.
Claim 3
Dependent Claim
33 words
A process for the preparation of a black coloring agent according to claim 1, wherein a water-insoluble chitosan is used as the chitosan to obtain said black coloring agent in a powder form.
Claim 4
Dependent Claim
44 words
A process for the preparation of a black coloring agent according to claim 1, wherein a gelatinous chitosan salt obtained by dissolving insoluble chitosan in an inorganic or organic acid is used as the chitosan to obtain said black coloring agent in gel form.
Claim 5
Dependent Claim
46 words
A process for the preparation of a black coloring agent according to claim 1, wherein a water-soluble chitosan, chitosan oligosaccharide or D-glucosamine, or an inorganic acid or organic acid salt thereof is used as the chitosan to obtain said black coloring agent in a liquid form.
Claim 6
Dependent Claim
46 words
A process for the preparation of a black coloring agent according to claim 1, wherein the treatment is carried out in the presence of a water-soluble sodium salt, potassium salt, magnesium salt, calcium salt, barium salt, zirconium salt, iron salt, nickel salt, aluminum salt, or silicate.
Claim 7
Dependent Claim
42 words
A process for the preparation of a black coloring agent in powder form, which comprises bringing a black coloring agent in gel form obtained by a process as set forth in claim 3 into contact with an aqueous solution o an alkali.
Claim 8
Dependent Claim
41 words
A process for the preparation of a black coloring agent in powder form, which comprises forming a film of a black coloring agent in gel form prepared by a process as set forth in claim 3 and pulverizing the formed film.
Claim 9
Dependent Claim
39 words
A process for the preparation of a black coloring agent in powder form, which comprises dyeing particles of a polymeric material with a black coloring agent in gel form prepared by a process as set forth in claim 3.
Claim 10
Dependent Claim
49 words
A process for the preparation of a black coloring agent in powder form according to claim 8, wherein the dyeing is carried out in the presence of a water-soluble sodium salt, potassium salt, magnesium salt, calcium salt, barium salt, zirconium salt, iron salt, nickel salt, aluminum salt, or silicate.
Claim 11
Dependent Claim
29 words
A process for dyeing a fiber, which comprises dyeing said fiber with a black coloring agent in gel form prepared by a process as set forth in claim 3.
Claim 12
Dependent Claim
42 words
A process for dyeing a fiber according to claim 10, wherein the dyeing is carried out in the presence of a water-soluble sodium salt, potassium salt, magnesium salt, calcium salt, barium salt, zirconium salt, iron salt, nickel salt, aluminum salt, or silicate.
Claim 13
Dependent Claim
38 words
A process for increasing the blackness of black iron oxide, which comprises coating a black coloring agent in gel form prepared by a process as set forth in claim 3 on the surface of said black iron oxide.
Claim 14
Dependent Claim
38 words
A process according to claim 12, wherein the coating is carried out in the presence of a water-soluble sodium salt, potassium salt, magnesium salt, calcium salt, barium salt, zirconium salt, iron salt, nickel salt, aluminum salt, or silicate.
Claim 15
Dependent Claim
39 words
A process for the preparation of a black coloring agent in powder form, which comprises dyeing particles of a polymeric material with a black coloring agent in liquid form prepared by a process as set forth in claim 4.
Claim 16
Dependent Claim
49 words
A process for the preparation of a black coloring agent in powder form according to claim 14, wherein the dyeing is carried out in the presence of a water-soluble sodium salt, potassium salt, magnesium salt, calcium salt, barium salt, zirconium salt, iron salt, nickel salt, aluminum salt, or silicate.
Claim 17
Dependent Claim
29 words
A process for dyeing a fiber, which comprises dyeing said fiber with a black coloring agent in liquid form prepared by a process as set forth in claim 4.
Claim 18
Dependent Claim
42 words
A process for dyeing a fiber according to claim 16, wherein the dyeing is carried out in the presence of a water-soluble sodium salt, potassium salt, magnesium salt, calcium salt, barium salt, zirconium salt, iron salt, nickel salt, aluminum salt, or silicate.
Claim 19
Dependent Claim
38 words
A process for increasing the blackness of black iron oxide, which comprises coating a black coloring agent in liquid form prepared by a process as set forth in claim 4 on the surface of said black iron oxide.
Claim 20
Dependent Claim
38 words
A process according to claim 18, wherein the coating is carried out in the presence of a water-soluble sodium salt, potassium salt, magnesium salt, calcium salt, barium salt, zirconium salt, iron salt, nickel salt, aluminum salt, or silicate.
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GB2107340A
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US4603048A
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JPH01294741A
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JPH01234476A
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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) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |