Styrenic copolymer blend with low shrinkage

    公开(公告)号:US11591462B2

    公开(公告)日:2023-02-28

    申请号:US16495133

    申请日:2018-03-14

    Inventor: Tobias Schulz

    Abstract: The invention relates to polymer blends of a styrene copolymer A selected from the group consisting of styrene acrylonitrile copolymers (SAN), styrene acrylonitrile maleic anhydride terpolymers (SMA), styrene acrylic copolymers, acrylonitrile butadiene styrene terpolymers (ABS), acrylonitrile butadiene styrene terpolymers with polyamide (ABS/PA), and acrylonitrile styrene acrylate terpolymers (ASA); and at least one copolymer B selected from the group consisting of styrene-butadiene block copolymers (SBC) and styrene-isoprene block copolymers (SIS); wherein the mold shrinkage of the polymer blend is reduced by at least 5% compared to the mold shrinkage of the pure styrene copolymer A.A process for the preparation of the polymer blends and the uses of the polymer blends in an injection molding process are described.

    Thermoplastic styrene copolymer resin composition with improved UV resistance

    公开(公告)号:US11525052B2

    公开(公告)日:2022-12-13

    申请号:US16627448

    申请日:2018-07-03

    Abstract: Thermoplastic styrene copolymer resin composition comprising: (a1) at least one styrene-acrylonitrile copolymer component A1, (a2) at least one acrylonitrile styrene acrylate graft copolymer A2 as impact modifier, (a3) optionally at least one thermoplastic polymer A3 other than components A1 and A2, (b) at least one transition metal oxide pigment B, (cl) at least one hindered amine UV light stabilizer C1, (c2) optionally at least one UV absorber C2 different from Cl, (d) optionally further polymer additives D, other than components B, C1, C2, and E, and (e) optionally one metal scavenger component E, wherein at least 99.0 wt.-% of the transition metal oxide pigment B consist of transition metal atoms and oxygen atoms.

    Process for production of impact modified thermoplastic moulding composition with improved processing and impact strength

    公开(公告)号:US11352490B2

    公开(公告)日:2022-06-07

    申请号:US16771504

    申请日:2018-12-10

    Abstract: The present invention relates to a process for producing a thermoplastic moulding composition comprising a thermoplastic copolymer A, a graft copolymer B and optionally a further polymer component C as well as optional further additives K, wherein the preparation of the graft copolymer B is carried out via emulsion polymerization, and wherein at least one surfactant S2 is used in grafting step of emulsion polymerization in a volume concentration in the range of 0.46 to 0.75 mol/m3, based on the volume of the graft copolymer B latex particles obtained; and wherein the mean particle diameter Dw of the latex particles of graft copolymer B is in the range of 60 to 800 nm.

    Process for producing ASA plastics
    18.
    发明授权

    公开(公告)号:US11059965B2

    公开(公告)日:2021-07-13

    申请号:US16334936

    申请日:2017-09-25

    Abstract: The invention relates to a process for producing thermoplastic molding materials based on acrylonitrile-styrene-acrylate copolymers (ASA) having improved surface properties, in particular an improved stability of surface quality during storage in a hot and humid environment and a reduced content of residual monomers. The invention further relates to the use of a fluidized bed dryer and/or a flow dryer in the production of thermoplastic ASA molding materials for improving surface quality and the use of a fluidized bed dryer and/or a flow dryer in the production of thermoplastic ASA molding materials for reducing the content of residual monomers. The invention further provides ASA molding materials producible by means of the process according to the invention and also moldings.

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