| 摘要 |
The invention relates to phase-stable prepolymer compositions, in particular for producing polyurethane foams. Said prepolymer composition contains polyurethane prepolymers, obtained by reacting a first prepolymer component containing polyester polyols with at least two hydroxy groups and non-polar constituents with a second prepolymer component, which comprises polyisocyanates containing at least two isocyanate groups. The polyesterpolyols are transesterificaton products consisting of vegetable oils, polyethylene terephthalate and polyols. Said prepolymer component becomes more strongly hydrophobic by the use of polyesterpolyols that have been produced in this manner, permitting the use of chlorinated paraffin in a higher concentration as a flame-retardant and softener, without separation occurring. The invention also relates to a method for producing the inventive prepolymer composition, to pressurised containers and cartridges that contain the inventive composition and to the use of the inventive polymer composition for producing polyurethane foams. |
