| 摘要 |
<p>Polyamide fibrous substrates which resist staining by acid dyes, and processes for preparing the same which comprise applying, at pH 2 to 10, a base-catalyzed condensation product formed by the condensation reaction of a mixture of bis(hydroxyphenyl)sulfone and at least one other phenolic compound with formaldehyde to give a product known as a resole.</p> |
