Non-flammable aminoplast- and phenoplast- impregnated paper laminate - contg. flame-inhibiting prod. of aluminium or copper cpd., phosphoric acid and nitrogen base

摘要

Laminate contg. external layers of paper and amine-HCHO aminoplast and core layers of papar with flame-inhibiting impregnating agent (A), and phenol-CHCHO phenoplast, consists, by wt., of 9-26% external paper layers, 6-49% core paper, 16-30% phenoplast, 5-26% aminoplast and 4-8% of (A). (A) is a reaction prod. of Al- or Cu cpds. with H3PO4 and N-contg. gases and consists, by wt., of 37-63% P2O5, 0-6% water-soluble P2O5, 5-11% NH3 and 18-43% of >=1 metal oxide. Laminates can be used as internal building- and lining-materials in aeroplane-, ship- and vehicle construction. (A) addn. reduces combustibility index, K, from 1.2-1.3 (difficulty ignitable) to 0.1-0.5 (burning with difficulty). Laminate thickness can be reduced without reducing initial stability to water, decorative properties and strength.