Method to impart coffee stain resistance to polyamide fibers
US5135774A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1990 |
| Grant date | Aug 4, 1992 |
| Priority date | — |
| Expiry date | Mar 27, 2010 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M15/233
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method to impart coffee stain resistance to polyamide fibers such as those found in textile substrates (e.g., carpets). The method includes preparing an aqueous dispersion of charged microfine beads of either (i) a copolymer selected from the group consisting of a hydrolyzed aromatic-containing vinyl ether maleic anhydride copolymer, a half ester of an aromatic-containing vinyl ether maleic anhydride copolymer, and mixtures thereof, or (ii) an aromatic-containing acrylate copolymerized with an acid selected from the group consisting of acrylic acid and maleic acid, immersing the polyamide fiber in the aqueous dispersion so that the beads contact and coat the fiber via an electrostatic attraction. The aqueous dispersion is prepared by dissolving the polymer into a water-soluble solvent to form a solution, injecting the solution into water, and evaporating the solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.