Carboxylic acid-containing polymer/resole stain-resists
US5708087A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 1997 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | May 14, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M2101/34
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A composition which provides polyamide substrates with resistance to staining by acid dyes comprising (A) carboxylic acid-containing stain-resist polymers selected from: PA1 (i) methacrylic acid polymers, or PA1 (ii) hydrolyzed copolymers of maleic anhydride with ethylenically unsaturated aromatics, alpha-olefins, alkyl vinyl ethers or alkyl allyl ethers or PA1 (iii) mixtures of (i) and (ii), and (B) resole condensates prepared by reacting bis(hydroxyphenyl)sulfone which contains no sulfonate or carboxylate groups with formaldehyde in the presence of an alkali metal hydroxide, at a bis(hydroxyphenyl)sulfone resole resin:carboxylic acid-containing stain-resist polymer weight ratio in the range between about 1:20 and 2.5:1.0 is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.