| 摘要 |
The invention relates to phase-stable prepolymer compositions, in particular for producing polyurethane foams, said prepolymer composition containing polyurethane prepolymers obtained through a reaction of a first prepolymer component which contains polyester polyols with at least two hydroxy groups and non-polar constituents, and a second prepolymer component containing polyisocyanates having at least two isocyanate groups, said polyester polyols being transesterification products consisting of vegetable oils, polyethylene terephthalate and polyols. Said prepolymer component becomes more strongly hydrophobic by the use of polyester polyols that have been produced in this manner, permitting the use of chlorinated paraffins in higher concentration as flame retardant and softener, without segregation occurring. Furthermore, the invention also relates to a method for the production of the inventive prepolymer composition, pressurized containers and cartridges containing the prepolymer composition according to the invention, as well as the use of the inventive prepolymer composition to produce polyurethane foams. |
