| 摘要 |
FIELD: polymer production. SUBSTANCE: invention relates to hydrocarbon-foamed polyurethane plastics, which can be used in refrigeration industry. Title plastics are prepared via reaction of aromatic polyisocyanates with polyol component including (i) aromatic amine-initiated polyether based on 70-100 wt % 1,2-propylene oxide and 0-30 wt % ethylene oxide with molecular weight 300-800, (ii) mainly saccharose-initiated polyether based on 70-100 wt % 1,2-propylene oxide and 0-30 wt % ethylene oxide with molecular weight 400-1000, and (iii) propylene glycol-initiated polyether based on 70-100 wt % 1,2-propylene oxide and 0-30 wt % ethylene oxide with molecular weight 500-1500, and also (iv) water, n- and/or iso-pentane as expanding agent, additives, and aids. EFFECT: improved adhesive properties, increased compressive strength point, and reduced heat conductivity factor. 4 cl, 1 tbl, 4 ex
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