Cationic dyeability modifier for use with polyester and polyamide
US6312805A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 11, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Feb 11, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2913
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A cationic dyeability modifier for incorporation into polyesters and polyamides to increase their affinity for basic dyes, said cationic dyeability modifier having the following formula: EQU R.sub.1 OOC--(CH.sub.2).sub.n --CH(CH.sub.2 CH.sub.2 SO.sub.3 X)--(CH.sub.2).sub.m --COOR.sub.2 where n is an integer from 1 to 10, m is an integer from 1 to 10, X is an alkali metal selected from the group consisting of lithium, sodium and potassium, and R.sub.1 and R.sub.2 are independently selected from hydrogen and alkyl groups having one to four carbon atoms is disclosed. Basic dyeable copolyesters and copolyamides containing the cationic dyeability modifier incorporated into the polymer chain of the copolymer are also disclosed. A process for preparing a basic dyeable copolyester by combining poly(alkylene terephthalate)-forming monomers or polyoxyalkylene glycol oligomers with the cationic dyeability modifier, and mixing and heating at a temperature sufficient to cause copolymerization to form a copolyester is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.