| 摘要 |
The invention relates to a method for producing polybutadienols from polybutadienes having a number average molecular weight of 300 to 2000 g/mol containing 20 to 50% 1,4-double bonds and 50 to 80% 1,2-vinyl and 1,2-cyclovinyl double bonds, with respect to the amount of all double bonds, comprising the steps i) epoxidising a part of or all 1,4- double bonds using an epoxidation reagent that selectively epoxidises 1,4-double bonds, and ii) reacting the epoxidised polybutadienes with an alcohol or water to form a polybutadienol. The invention further relates to polybutadienols that can be obtained according to this method, as well as to the use of said polybutadienols for the production of polyurethanes with a glass transition temperature of at least 15 °C, and to said polyurethanes. |
