Back to results
US 11,566,136 B2Granted
pH sensitive dyes for textile materials, a process for their preparation and uses thereof
AssigneeSanko Tekstil Isletmeleri San. Ve Tic. A.S.
InventorsGökhan Kaplan, Gözde Öktem, Deniz Iyidogan, Olcay Bayar, Semih Kazanc, Özden Akman
Life of this patent
Estimating the term…
Abstract
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.
Claims8
A compound of formula (I)
- wherein R1, R2, R3 and R4 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.
Dependencies are inferred from the claim text.