Polyether-polycarbonate diols and processes for their production and use
AssigneeBayer Aktiengesellschaft
InventorsKlaus Konig, James M. Barnes
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Abstract
Polyether polycarbonate diols based on 1,6-hexanediol and having a molecular weight of from 500 to 12,000 are made by etherifying 50-100 mole % 1,6-hexane-diol in the presence of 0-50 mole % of specified diols and reacting the resultant polyether with a compound selected from diarylcarbonates, dialkyl carbonates, dioxolanones, hexanediol bischlorocarbonic acid esters, phosgene and urea. These diols are particularly useful in the production of polyurethanes having improved physical properties.
Claims13
A hydroxyl-terminated polyether polycarbonate having a molecular weight of from 500 to 12,000 containing hexamethylene groups as ether groups in which the ratio of ether groups to carbonate groups is from 1 to 1:5.
Dependencies are inferred from the claim text.