| abstract |
Protective coating for glass fibres which are to be subjected to mechanical treatments such as spinning and weaving, comprises a 2-8% solids aqs. disperson of (2) 15-85% of a film-forming material (pref. starch + 0.25 pts. per pt. of polyvinyl alcohol or gelatine), (ii) 5-75 pts. of a finely divided wax (pref. paraffin wax with a melting pt.>49 deg.C) with a particle size is not >20 mu, (iii) >0.01 pts. per part wax of a cationic surface active agent and opt. (iv) ca. 0.01 pts. of a cationic lubricant. A compsn. comprising 1.7% paraffin wax, 4% starch, 0.2% cationic lubricant, 0.25% of a cationic capillary-active agent with an HLB value of 10, 0.10% polyvinyl alcohol, remainder water. |