Poly-(carbonate-urethane)-triols and preparation thereof

Details Poly-(carbonate-urethane)-triols and preparation thereof Poly-(carbonate-urethane)-triols and preparation thereof

1979-05-29

1980-07-22

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having a nitrogen atom directly bonded to the...

260463, 528370, C08G 1800

Patent

active

042140730

ABSTRACT:
Novel poly-(carbonate-urethane)-triols which are liquid at room temperature, have a molecular weight of less than 5000, and are of the formula: ##STR1## wherein A is an alkylene or cycloalkylene group, R is an alkylene group having up to 4 carbon atoms, Z is an alkyl group having up to 4 carbon atoms, n is a number representing the degree of polymerization, and m is 0 or 1.
These poly-(carbonate-urethane)-triols are prepared by a transesterification reaction between an alkyl or aryl carbonate, at least one aliphatic or cycloaliphatic diol, and a primary or secondary dialkanolamine, the dialkanolamine being present in such an amount that there is statistically one molecule of the dialkanolamine per polymer chain.
The poly-(carbonate-urethane)-triols are useful for the production of aminoplast resins which can be used, for example, as stoving lacquers.

REFERENCES:
patent: 2321586 (1943-06-01), D'Alelio
patent: 3716572 (1973-02-01), Moore et al.
patent: 3873553 (1975-03-01), Hearsey
patent: 3950285 (1975-03-01), Wolgemuth

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