USE OF BLENDS FOR THE PREPARATION OF THERMOPLASTIC COMPOSITIONS MODIFIED WITH IMPACT MODIFIERS

摘要

Use of a mixture in compounding method for producing pigmented impact-modified thermoplastic polymer composition, comprising (in parts by weight, based on the sum of components (a) and (b)): (a) at least one graft polymer used in powder form, consisting of a rubber-elastic core and a grafted polymer component as shell (60-98); (b) at least one inorganic or organic liquid compound (2-40); and (c) at least one pigment, is claimed. The graft polymer (a) and/or the pigment (c) absorb or adsorb the liquid inorganic or organic compound (b). Use of a mixture in compounding method for producing pigmented impact-modified thermoplastic polymer composition, comprising (in parts by weight, based on the sum of components (a) and (b)): (a) at least one graft polymer used in powder form, consisting of a rubber-elastic core and a grafted polymer component as shell (60-98); (b) at least one inorganic or organic liquid compound (2-40); and (c) at least one pigment, is claimed. The graft polymer (a) and/or the pigment (c) absorb or adsorb the liquid inorganic or organic compound (b). The boiling temperature of the component (b) at normal pressure is less than the temperature of the polymer melt during the compounding. Independent claims are also included for: (1) producing the impact-modified thermoplastic composition comprising at least one pigment, comprising (i) preparing the above mixture, (ii) mixing, melting and dispersing a component (20-99 parts by weight, based on the sum of the components used in the second step) comprising at least one thermoplastic polymer or a mixture of at least one thermoplastic polymer and at least one graft polymer (a) with the mixture (1 to 80 weight parts, based on the sum of the components used in the second step) prepared in step (i) and optionally with further components (upto 40 parts by weight, based on the sum of the components used in the second step), where the inorganic or organic compound (b) is removed from the prepared alloyed polymer melt by further applying a negative pressure; and (2) a composition prepared by the above method and moldings produced from the composition.