BLACK STYRENE COPOLYMER COMPOSITIONS FOR HIGH GLOSS EXTERIOR APPLICATIONS

    公开(公告)号:US20240117171A1

    公开(公告)日:2024-04-11

    申请号:US17769005

    申请日:2020-10-13

    CPC classification number: C08L25/12 C08K3/04 C08K5/3435 C08L51/06

    Abstract: The invention relates to a molding composition (P) comprising: (A) 83.2 to 98.5 wt.-% of a thermoplastic polymer composition (A) comprising: (A-1) at least one graft copolymer (A-1), and (A-2) at least one thermoplastic matrix polymer (A-2) based on one or more vinylaromatic copolymers; (B) 1.5 to 3 wt.-% of carbon black (B) or a mixture of carbon blacks (B); (C) a hindered amine light stabilizer composition (C), comprising at least two of substances (C-1) to (C-3): (C-1) 0 to 0.9 wt.-%, based on the total weight of the molding composition (P), of at least one hindered amine light stabilizer having a dipiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the dipiperidine structure, (C-2) 0 to 0.9 wt.-% of a hindered amine light stabilizer mixture having a monopiperidine structure with at least one alkyl group at each of the 2 and 6 positions of the monopiperidine structure and (C-3) 0 to 2 wt.-%, of at least one hindered amine light stabilizer having a polymeric structure comprising piperidine groups with at least one alkyl group at each of the 2 and 6 positions of the piperidine groups provided that the at least one hindered amine light stabilizer composition (C) is present in the molding composition (P) in an amount of at least 0.2 wt.-%; (D) 0 to 5 wt.-%, of one or more further additives (D), different from (B) and (C); and (E) 0 to 5 wt.-%, of one or more further colorants, dyes or pigments (E), different from (B) and (D); wherein the constituents (A) to (E) sum up to 100 wt.-% of the molding composition (P).

    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.

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