US4083689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid ε-caprolactam dyestuff preparations
Assignee: Bayer AG
•
Filing: 1975-09-26
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Granted: 1978-04-11
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Expires: 1995-09-26
Abstract
Abstract Dyestuff preparations consisting of one or more water-soluble dyestuffs, one or more water-soluble carboxylic acid amides with melting points between 40° and 200° C optionally further customary auxiliaries are easily wettable with water and easily and rapidly soluble even in cold water.
Inventors
- 👤 Karlheinz Wolf
- 👤 Konrad Nonn
- 👤 Reinhold Hornle
- 👤 Hans Werner Petroll
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:44
CPC Classifications
C; C09; C09B; C09B67/00; C09B67/0071; C09B67/0083; C09B67/0092
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
52 words
A solid dyestuff preparation in granular form consisting essentially of one or more water-soluble dyestuffs dispersed or dissolved in ε-caprolactam and formed by (a) dispersing or dissolving said dyestuff in an ε-caprolactam melt; (b) solidifying the resulting dyestuff/ε-caprolactam melt by cooling; and (c) shaping the melt during or after cooling into granules.
Claim 2
Dependent Claim
52 words
A solid dyestuff preparation in granular form consisting essentially of one or more water-soluble dyestuffs dispersed or dissolved in ε-caprolactam and formed by (a) dispersing or dissolving said dyestuff in an ε-caprolactam melt; (b) solidifying the resulting dyestuff/ε-caprolactam melt by cooling; and (c) shaping the melt during or after cooling into granules.
Claim 3
Dependent Claim
24 words
The dyestuff preparation of claim 1 wherein the dyestuff is dissolved in the ε-caprolactam melt, and the resultant dyestuff/ε-caprolactam melt is shaped during cooling.
Claim 4
Dependent Claim
29 words
The dyestuff preparation of claim 2, wherein the dyestuff/ε-caprolactam melt is sprayed and the spray solidified by rapid cooling thereof to provide free-flowing, non-dusting granules of said dyestuff preparation.
Claim 5
Dependent Claim
15 words
The dyestuff preparation of claim 3, wherein the dyestuff/ε-caprolactam melt is sprayed in a gas.
Claim 6
Dependent Claim
21 words
The dyestuff preparation of claim 3, wherein the dyestuff/ε-caprolactam melt is sprayed into a liquid in which the granules are insoluble.
Claim 7
Dependent Claim
18 words
The dyestuff preparation of claim 3, wherein the dyestuff/ε-caprolactam melt is cooled on a cooling roller and flaked.
Claim 8
Dependent Claim
22 words
The dyestuff preparation of claim 3, wherein the dyestuff/ε-caprolactam melt is forced through a sieve while partially solidified to obtain longish-shaped granules.
Claim 9
Dependent Claim
15 words
Method of preparing dyebaths and printing pastes by employing the dyestuff preparations of claim 1.
Claim 10
Dependent Claim
28 words
The solid dyestuff preparation of claim 2 wherein said preparation comprises from 20 to 80% by weight of dyestuff and from 5 to 70% by weight of ε-caprolactam.
Claim 11
Dependent Claim
16 words
Dyestuff preparations according to claim 1, characterized in that they contain an anionic or cationic dyestuff.
Claim 12
Dependent Claim
29 words
A solid dyestuff preparation in granular form consisting essentially of one or more water-soluble dyestuffs in ε-caprolactam formed by spray-drying an aqueous solution of ε-caprolactam and the water-soluble dyestuff.
Claim 13
Dependent Claim
29 words
A solid dyestuff preparation in granular form consisting essentially of one or more water-soluble dyestuffs in ε-caprolactam formed by spray-drying an aqueous solution of ε-caprolactam and the water-soluble dyestuff.
Claim 14
Dependent Claim
58 words
A process for the production of non-dusting, free-flowing water-wettable compositions of heat-sensitive water-soluble dyestuffs consisting essentially of: a. dissolving one or more heat-sensitive, water-soluble dyestuffs in a melt of ε-caprolactam; b. forming solid granules of the dyestuff/ε-caprolactam melt by spraying this melt in a gas or liquid in which the granules are insoluble and rapidly cooling the spray.
Claim 15
Dependent Claim
58 words
A process for the production of non-dusting, free-flowing water-wettable compositions of heat-sensitive water-soluble dyestuffs consisting essentially of: a. dissolving one or more heat-sensitive, water-soluble dyestuffs in a melt of ε-caprolactam; b. forming solid granules of the dyestuff/ε-caprolactam melt by spraying this melt in a gas or liquid in which the granules are insoluble and rapidly cooling the spray.
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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) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |