Preparing acrylonitrile-butadiene styrene-copolymer, useful to prepare e.g. foils and fibers, comprises adding seed latex, polymerizing butadiene, styrene, styrene and acrylonitrile, and mixing graft copolymer with thermoplastic copolymer

摘要

Preparing acrylonitrile-butadiene styrene-copolymer containing (A) graft copolymer comprising (A1) graft substructure, which contains (A11) butadiene, (A12) styrene and (A13) agglomerizing agent, (A2) graft shell containing (A21) styrene and (A22) acrylonitrile, and (B) thermoplastic copolymer containing (B1) acrylonitrile and (B2) styrene, comprises adding seed latex; radical emulsion polymerization of the component (A11) and optionally (A12); radical or redox initiator emulsion polymerization of components (A21) and (A22); and mixing (A) with thermoplastic copolymer (B). Preparation of acrylonitrile-butadiene styrene-copolymer containing (A) 10-60 wt.% of a graft copolymer comprising (A1) 55-70 wt.% of graft substructure, which contains (A11) 85-100 wt.% of butadiene, (A12) 0-10 wt.% of styrene and (A13) 0-5 wt.% of an agglomerizing agent, (A2) 30-45 wt.% of graft shell containing (A21) 70-90 wt.% of styrene and (A22) 10-30 wt.% of acrylonitrile, and (B) 40-90 wt.% of a thermoplastic copolymer containing (B1) 15-35 wt.% of acrylonitrile and (B2) 65-85 wt.% of styrene, comprises adding a seed latex; radical emulsion polymerization of the component (A11) and optionally (A12), in the presence of the seed latex; radical or redox initiated emulsion polymerization of the components (A21) and (A22) in the presence of the formed (A1); and mixing (A) with a thermoplastic copolymer (B) produced in a separate way, where: the seed latex exhibits an average particle diameter of less than 10 nm, determined by analytical ultracentrifuge corresponding to the method according to W. Scholtan and H. Lange, Colloid.-Periodical and Z.-Polymer 250 (1972), pages 782-796; and instead of the described turbidity optics, an interference optic is used in the process. Independent claims are included for: (1) the acrylonitrile-butadiene styrene-copolymer obtained by the above method; (2) the preparation of a rubber elastic polymer particulate comprising polymerization the rubber elastic polymer particulate forming monomer in the presence of the seed latex; and (3) the rubber elastic polymer particulate obtained by the above process.