Monomethylol ether diols and polyurethane solutions prepared therefrom
AssigneeBayer Aktiengesellschaft
InventorsHans Dieter Winkelmann, Harald Oertel, Norbert Weimann
Life of this patent
Estimating the term…
Abstract
The invention relates to monomethylol ether diols corresponding to the formula ##STR1## in which R represents a straight-chain or branched alkylene radical having up to 12 carbon atoms, and R' represents an alkyl radical.
Claims8
Monomethyl ether diols corresponding to the formula:
- ##STR25## in which R represents a straight-chain or branched alkylene radical having up to 12 carbon atoms, and
- R' represents an alkyl radical.
Monomethyl ether diols corresponding to the formula:
- ##STR26## in which R represents a straight-chain or branched alkylene radical having up to 12 carbon atoms, and
- R' represents a lower alkyl radical having 1 to 4 carbon atoms.
A monomethyl ether diol corresponding to the formula:
- ##STR27##
A monomethyl ether diol corresponding to the formula:
- ##STR28##
A process for the production of monomethyl ether diols corresponding to the formula:
- ##STR29## in which R represents a straight-chain or branched alkylene radical having up to 12 carbon atoms, and
- R' represents an alkyl radical,
- wherein N,N-dihydroxy alkyl hydrazines corresponding to the formula:
- ##STR30## in which R represents a straight-chain or branched alkylene radical having up to 12 carbon atoms, are reacted with alkoxymethyl isocyanates corresponding to the formula:
- OCN -- CH.sub.2 -- O -- R'
- in which R' represents an alkyl radical, or with reactive derivatives thereof, optionally in inert solvents.
Solutions of autocrosslinkable polyurethane produced by reacting a substantially linear NCO prepolymer of relatively long chain dihydroxy compounds with molecular weights of from about 600 to 6000 and excess quantities of organic diisocyanates, and chain extension in polyurethane solvents, with water or low molecular weight compounds comprising diols, diamines aminoalcohols, dihydrazide compounds, and hydrazine said compounds having molecular weights of from 32 to about 400, wherein the NCO prepolymer is produced using monomethylol ether diols corresponding to the formula:
- ##STR33## in which R is a straight-chain or branched alkylene radical having up to 12 carbon atoms;
- and
- R' is an alkyl radical, in quantities of from about 0.1 to 10% by weight based on the solids content.
Dependencies are inferred from the claim text.