| 摘要 |
Formulation is proposed for producing cellular, foamed-polymer product based on polyvinyl chloride, comprising in mass % relative to total mass: a polyvinyl chloride homopolymer in a ratio 35/60 having a K-value of from 60 to 85 by DIN ES ISO 1628-2 and a pH value of the aqueous extract ranging of from 8 to 12 by DIN ES ISO 1060-2; at least one isocyanate in a ratio 20/50 selected from isomers and homologues of diphenylmethane-4,4'-diisocyanate and modified diphenylmethane-4,4'-diisocyanate s and mixtures thereof; at least one anhydride in a ratio 1/20 selected from the group of succinic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methyl -tetrahydrophthalic anhydride, 4-methylhexahydrophthalic anhydride, cyclohexane-1,2-dicarboxylic anhydride, methylendomethylene tetrahydrophthalic anhydride, dodecenyl succinic anhydride, trimellitic anhydride and mixtures thereof; at least a surfactant in a ratio 0.08/0.8; at least a foaming agent in a ratio 0.5/7. There also is proposed a cellular, foamed-polymer product produced from said formulation and a process for producing said product (embodiments). |
