| abstract |
The present invention relates to hybrid impact modifiers prepared by: either spray drying, coagulation, freeze coagulation or other known recovery methods of a mixture of a latex or slurry of standard impact modifiers and a slurry of a mineral filler, or simultaneous drying (by spray-drying, coagulation other known recovery possible methods) of (i) a latex or slurry of standard impact modifiers and of (ii) a slurry of a mineral filler, further to the coagulation or freeze coagulation, if any, there is a filtration and drying step to recover these hybrid impact modifiers as a powder. The present invention also relates to the use of said hybrid impact modifiers in thermoplastic polymers, and a thermoplastic polymer containing said hybrid impact modifiers. The hybrid impact modifiers may exhibit improved powder properties (flowability, lumping/caking resistance, segregation between the organic and the mineral parts) and better dispersion homogeneities. |