Monoazo reactive red dyestuff
AssigneeEverlight USA, Inc.
InventorsHuei-Chin Huang, Chia-Huei Yu
Life of this patent
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Abstract
A monoazo reactive red dyestuff of the formula (I), wherein the R1, R2, R3, X, D, Z and n are as defined in the description. These kinds of dyestuffs are suitable for dyeing and printing of materials containing either cellulose fibers, such as cotton, artificial cotton, linen, and artificial linen, or synthetic polyamide, such as wool, silk, and nylon etc., as well as on mixed or cross-linked cellulose fibers and other fibers. Dyed materials with excellent properties can be obtained, showing especially outstanding performance in of wash-off, level-dyeing, light fastness and perspiration-light fastness.
Claims22
A monoazo reactive red dyestuff of formula (I),
- wherein:
- X is —NHCN, —OH, —SCH2COOH, —NHSO2CH3, 3-carboxypyridinium,
- or halogen;
- D is a phenyl having 0 to 3 substituent groups, said substituent groups are selected from the group consisting of halogen, C1-4 alkyl, C1-4 alkoxyl, nitro, amino, hydroxyl, carboxyl, phosphonic acid and sulfo group;
- Z is —SO2—CH═CH2 or SO2—CH2—CH2—U;
- U is —OSO3H, Cl, Br, —OPO3H2, —SSO3H or
- R2 is sulfo, carboxy, halogen or C1-4 alkoxy;
- n is 1;
- when X is a halogen atom, R1 is limited to a hydrogen atom and R3 is limited to C1-4 alkyl or C1-4 alkyl having at least one substituent;
- when X is —NHCN, —OH, —SCH2COOH, —NHSO2CH3, 3-carboxypyridinium or
- R1 and R3 independently can be any group selected from hydrogen atom, C1-4 alkyl, phenyl,
- or C1-4 alkyl having one or more substituent group selected from hydroxyl, carboxyl, sulfo, carbamoyl or methoxy carbonyl.
Dependencies are inferred from the claim text.