| 摘要 |
<p>An aqueous binder composition for mineral fibres comprises: a water-soluble binder component obtainable by reacting at least one alkanolamine with at least one carboxylic anhydride in proportions such that the ratio of equivalents of amine groups plus hydroxy groups (NH+OH), excluding urea, to equivalents of carboxy groups (COOH) in the binder component is within the range of from about 0.6 to about 1.5 and, optionally, treating the reaction product with a base; and urea in an amount of from about 1 to about 25 wt %, based on solids of the binder composition; the alkanolamine, carboxylic anhydride and urea reactants being employed in proportions such that the ratio of total equivalents of amine groups plus hydroxy groups (NH+OH), including urea, to equivalents of carboxy groups (COOH) in the binder composition is between and includes the following lower limit x and upper limit y: Formulae (I) and (II).</p> |
