| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to polymeric compositions for protecting soil and open pits for raw materials from seasonal freezing. The carbamide foam plastic composition contains carbamidoformaldehyde resin, foaming agent, curing agent (orthophosphoric acid) and water. The composition additionally contains softwood extracts, organomineral modifier (flue ash), with the following ratio of components, wt %: carbamidoformaldehyde resin 23-25; foaming agent 5-8; curing agent (orthophosphoric acid) 10-12; softwood extracts 9-14; organomineral modifier 7-20; water - the rest. ^ EFFECT: low toxicity, low degree of flammability and high strength of carbamide foam plastic from the disclosed composition. ^ 3 cl, 2 tbl, 3 ex |
