Polyurethane and polyurethane urea elastomers based on polycarbonate polyoles

摘要

Polycarbonate polyol with a hydroxyl number of 50-80 mg potassium hydroxide (KOH)/g and an average functionality of 1.9-2.2, obtained by reacting a mixture of: (a) alpha , omega -alkane diol with 4-8 carbon atom; (b) technical dodecanediol; and (c) 0-10 wt.% of alkanol with 4-10 carbon atoms and hydroxyl functionality of 1-3, relative to the total mixture of (a), (b) and (c), with a carbonyl component, which is diaryl carbonate, dialkyl carbonate or carbonyl chloride, is claimed. Polycarbonate polyol with a hydroxyl number of 50-80 mg potassium hydroxide (KOH)/g and an average functionality of 1.9-2.2 obtained by reacting a mixture of: (a) alpha , omega -alkane diol with 4-8 carbon atom; (b) technical dodecanediol, where the technical dodecanediol contains 30-50 wt.% of 1,12-dodecane diol, 5-20 wt.% of diol with less than 10 carbon atoms and the absence of diol with more than 12 carbon atoms and the technical dodecanediol is present at 15-85 wt.%, relative to the mixture of (a) and (b); and (c) 0-10 wt.% of alkanol with 4-10 carbon atoms and hydroxyl functionality of 1-3, relative to the total mixture of (a), (b) and (c), with a carbonyl component, which is diaryl carbonate, dialkyl carbonate or carbonyl chloride, is claimed. Independent claims are included for: (1) an isocyanate-prepolymer with an isocyanate of 3-15 wt.%, obtained by reacting polycarbonate polyol and polyisocyanate, which is 1,5-naphthaline diisocyanate, 2,4'-diphenylmethanediisocyanate (2,4'-MDI), 4,4'-diphenylmethanediisocyanate (4,4'-MDI), mixture of 2,4'- and 4,4'-MDI, carbodiimide/uretonimine-modified-MDI-derivative or in molar excess of higher homologous dimethane series, diisocyanate toluol, hexamethylene diisocyanate or isophorone diisocyanate; and (2) polyurethane elastomer and polyurethaneurea elastomer obtained by reacting isocyanate-prepolymer and (i) aliphatic diol with primary hydroxyl group and number average molecular weight of 62-202 and optionally in less amount of 0-10 wt.%, relative to the aliphatic diol, compounds of small chain polyol with functionality of 2-4 and higher molecular polyol with a functionality of 2 or polycarbonate polyol, optionally in presence of water and other auxiliary- and additional-agents or (ii) aromatic diamine long chain of 4,4-methylene-bis-(2-chloroaniline), 3,3',5,5'-tetraisopropyl-4,4'-diaminodiphenylmethane, 3,5-dimethyl-3',5'-diisopropyl-4,4'-diaminophenylmethane, 3,5-diethyl-2,4-toluylenediamine, 3,5-diethyl-2,6-toluylenediamine, 4,4'-methylene- bis-(3-chloro-2,6-diethylaniline), 3,5-dimethylthio-2,4-toluylenediamine, 3,5-dimethylthio-2,6-toluylenediamine or 3, 5-diamino-4-chlorobenzoic acid-isobutyl ester, optionally in presence of water and other auxiliary- and additional-agents.