Indigo-derivatives as irreversible color changeable dyes for textile materials and process for dyeing textile materials
US-2017362771-A1 · Dec 21, 2017 · US
pH sensitive dyes for textile materials, a process for their preparation and uses thereof
US11566136B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11566136-B2 |
| Application number | US-202016984556-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 4, 2020 |
| Priority date | Aug 5, 2019 |
| Publication date | Jan 31, 2023 |
| Grant date | Jan 31, 2023 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
The present invention relates to novel 3-oxindole derivatives, to a process for their preparation and to the use of said derivatives as dyes for manufacturing pH sensitive textiles and as indicators in titration methods. The invention also relates to a method to manufacture pH sensitive textiles and to textiles so obtained.
First claim
Opening claim text (preview).
The invention claimed is: 1. A compound of formula (I) wherein R 1 , R 2 , R 3 and R 4 are, each independently, selected from a hydrogen atom, an alkyl group, an alkoxy group, a hydroxy group and a halogen atom, and salts and/or solvates thereof. 2. The compound according to claim 1 , wherein R 1 , R 2 , R 3 and R 4 are all a hydrogen atom. 3. A process for the preparation of a compound of formula (I) or a salt and/or solvate thereof, which comprises reacting a t-Boc-protected indigo of formula (II) wherein R 1 , R 2 , R 3 and R 4 are as defined in claim 1 , with sodium amide in an organic solvent, adding an acid to obtain an acidic pH, isolating the compounds of formula (I) and, optionally, converting it into one of its salts. 4. The process of claim 3 , wherein said solvent is an alcohol. 5. A compound selected from compounds (IIIA) and (IIIB) in the presence of a counter-ion, wherein R 1 , R 2 , R 3 and R 4 are defined as in claim 1 . 6. A method for dyeing textile materials which comprises applying one or more compounds of formula (I) according to claim 1 , onto a textile material. 7. The method of claim 6 , wherein said one or more compounds of formula (I) are solubilized in an aqueous solvent or solvent mixture. 8. The method of claim 7 , wherein the aqueous solvent or the solvent mixture is a water/alcohol mixture.
Assignees
Inventors
Classifications
- C09B7/08Primary
Other indole-indigos · CPC title
linked by a chain containing hetero atoms as chain links · CPC title
Indigo · CPC title
producing a change of colour · CPC title
Other synthetic dyes of known constitution · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11566136B2 cover?
- The present invention relates to novel 3-oxindole derivatives, to a process for their preparation and to the use of said derivatives as dyes for manufacturing pH sensitive textiles and as indicators in titration methods. The invention also relates to a method to manufacture pH sensitive textiles and to textiles so obtained.
- Who is the assignee on this patent?
- Sanko Tekstil Isletmeleri San Ve Tic As
- What technology area does this patent fall under?
- Primary CPC classification C09B7/08. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 31 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).