| 摘要 |
<p>This invention relates to a composition useful to form water swellable articles and to a method of preparing a water swellable polyelecrolyte coating, film, or fiber. The composition comprises (1) a soluble carboxylic polyelectrolyte characterized as a partially saponified polyacrylate polymer, (2) a soluble crosslinking agent reactive with carboxylate groups characterized as a polyamido-polyamine/epichlorohydrin adduct, and (3) a solvent consisting of water, lower alcohols, or mixtures thereof. The method comprises (a) forming the composition of a polyacrylate polymer, a polyamido-polyamine/epichlorohydrin adduct, and a solvent, (b) forming a coating, film, or fiber; and (c) drying the coating, film, or fiber to crosslink the polyelectrolyte with the crosslinking agent and remove the excess solvent. The final products of the present invention are water swellable and are useful wherever aqueous solutions need to be absorbed. Examples of the diverse utilities include surgical sponges, catamenial tampons, diapers, meat trays, paper towels, disposable door mats, disposable bath mats, and disposable litter mats for household pets.</p> |
