| 摘要 |
manufacture of shock-absorbing sublayer of coatings of maneges, circus arenas, and sporting mats. SUBSTANCE: composition contains, wt.pts: butadiene-piperylene copolymer with molecular weight of 1200-3200 containing 0.8-1.1% of hydroxy groups, 100; polymethylene polyphenyl isocyanate, 23-46; organotin or amine catalyst, 0.075- 3.000; water, 1.0-2.5; foam stabilizer, 0.2-0.8; glycerol, 1.5-4.0; 2,6-ditertbutyl-4-methylphenol or 1,4- benzenediol, 0.5-1.5. EFFECT: increased compression modulus of elastic polyurethane foam. 12 ex, 2 tbl
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