Novel poly (carbonates - urethanes) triols and their applications

摘要

P the present invention relates to the poly (carbonates - urethane), aliphatic or cycloaliphatic triols liquid with a molar mass of less than 5 000. / p & & p & these triols polylcarbonates - urethane) are obtained by transesterification, with the aid of a carbonate of alkyl or aryl, of at least one diol aliphatic or cycloaliphatic and a primary or secondary dialkanolamine in proportions such as poly (carbonate - urethane) obtained contains statistically a molecule of dialkanolamine per polymer chain, and has a functionality of hydroxyl groups terminals substantially equal to 3. / p & & p & the general formula of the poly (carbonates - urethane) according to the invention can be written: / p