| 摘要 |
A process for the production of fibre-containing polyamides comprises continuously impregnating a fibrous skein with an anhydrous melt of a lactam containing at least 5 ring members, said melt containing an alkaline polymerization catalyst, heating the resultant lactam-containing fibre skein to polymerization temperature and drawing off continuously the fibre skein containing the polymerizate. Polymerization accelerators, e.g.isocyanates, carbodiimides, cyanamides, benzoyl chloride or terephthaloyl chloride, may also be included in the lactam melt. Specified lactams are pyrrolidone, aminovaleric lactam, aminocapronic lactam, amino-oenanthic lactam and aminocapryllic lactam. Specified catalysts are the alkali metals, alkali and alkaline earth metal hydrides, the sodium salts of aromatic hydroxy compounds and sodium bicarbonate. Specified fibrous fillers are glass and asbestos fibres. The impregnated fibre skein may be granulated and moulded. In the example, a glass fibre is impregnated by polymerizing therein a melt of e -caprolactam containing phenyl isocyanate and sodium. Specifications 842,576 and 868,808 are referred to.ALSO:A process for the production of fibre-containing polyamides comprises continuously impregnating a fibrous skein with an anhydrous melt of a lactam containing at least 5 ring members, said melt containing an alkaline polymerization catalyst, heating the resultant lactam-containing fibre skein to polymerization temperatures and drawing off continuously the fibre skein containing the polymerisate. Polymerization accelerators may also be included in the lactam melt. Specified fibres are glass and asbestos. In the example a glass fibre is impregnated by polymerizing therein a melt of S -caprolactam containing phenyl p isocyanate and sodium. Specifications 842,576 and 868,808 are referred to. |
