FIELD: chemistry.
SUBSTANCE: polycarbonate polyols have hydroxyl number from 50 to 80 mg KOH/g and average functionality from 1.9 to 2.2. Polycarbonate polyols are obtained by reacting a mixture of α,ω-alkanediols with 4-8 carbon atoms, technical dodecanediol and alkanols with 4-10 carbon atoms and hydroxyl functionality from 1 to 3 with a carbonyl component. Technical dodecanediol contains 30-50 wt % 1,12-dodecanediol, 5-20 wt % diols with less than 10 carbon atoms and does not contain diols with more than 12 carbon atoms. Polyurethane and polyurethane carbamide elastomers are obtained by reacting NCO prepolymers obtained when reacting said polycarbonate polyols with polyisocyanates, with aliphatic diols or with aromatic, diamine chain elongation agents.
EFFECT: use of said polycarbonate polyols enables to obtain polyurethane and polyurethane carbamide elastomers having improved mechanical and physical and chemical characteristics.
3 cl, 6 tbl
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