Deep black thermoplastic molding compositions having high gloss and production thereof

Patent metadata

Field	Value
Publication number	US-2016222185-A1
Application number	US-201415021412-A
Country	US
Kind code	A1
Filing date	Sep 12, 2014
Priority date	Sep 16, 2013
Publication date	Aug 4, 2016
Grant date	—

Abstract

Deep black thermoplastic molding compositions having high gloss can be produced by mixing the following components: 90% to 99.5% by weight of one or more styrene copolymers as component A1, or 90% to 99.5% by weight of one or more polymethylmethacrylates (PMMA) and/or polyalkylmethacrylates as component A2, or 90% to 99.5% by weight of one or more polycarbonates (PC) and/or polyester carbonates as component A3, 0.01% to 5% by weight of a pigment black as component B, 0.1% to 1.5% by weight of at least two dyes soluble in the molding composition as component C, 0% to 5% by weight of one or more additives other than components B and C, as component D. These are found to be particularly weathering-resistant.

First claim

1 - 17 . (canceled)

18 . A black thermoplastic molding composition with high gloss, comprising:
a. from 90 to 99.5% by weight of one or more styrene copolymers as component A1, b. from 0.01 to 5% by weight of a carbon black pigment as component B, c. as component C, from 0.1 to 1.5% by weight of at least two dyes soluble in the molding composition, d. as component D, from 0 to 5% by weight of one or more additional substances different from components B and C, where the thermoplastic molding compositions have a deep-black color with L*-values from 0.5 to 2.0 (measured in accordance with DIN 5033) and a high gloss of more than 98 (measured in accordance with DIN 67530), and where each of the percentages by weight is based on the total weight of components A to D, and these give a total of 100 percent by weight.

19 . The thermoplastic molding composition as claimed in claim 18 , characterized in that component C comprises at least three different dyes which cover complementary color regions.

20 . The thermoplastic molding composition as claimed in claim 18 , characterized in that the molding composition comprises, as component B, from 0.01 to 5% by weight of a carbon black pigment which has an average primary particle size in the range from 5 to 100 nm, preferably 7 to 60 nm.

21 . The thermoplastic molding composition as claimed in claim 18 , characterized in that component A used comprises a copolymer of acrylonitrile, styrene, and/or α-methylstyrene, phenylmaleimide, maleic anhydride, methyl methacrylate, or a mixture of these.

22 . The thermoplastic molding composition as claimed in claim 18 , characterized in that component A used comprises a copolymer of acrylonitrile, styrene, and/or α-methylstyrene, and the proportion by weight of acrylonitrile, based on component A, is from 19 to 39% by weight.

23 . The thermoplastic molding composition as claimed in claim 18 , characterized in that component A used comprises a styrene/acrylonitrile copolymer or an α-methylstyrene/acrylonitrile copolymer.

24 . The thermoplastic molding composition as claimed in claim 18 , characterized in that component A used comprises a transparent styrene/acrylonitrile copolymer or a transparent α-methylstyrene/acrylonitrile copolymer with a melt volume rate (MVR, 220/3.8) of from 4 to 22 cm3/10 min.

25 . The thermoplastic molding composition as claimed in claim 18 , characterized in that component A used comprises a styrene/methyl methacrylate copolymer, where the proportion by weight of MMA, based on component A, is from 19 to 31% by weight.

26 . The thermoplastic molding composition as claimed in claim 18 , characterized in that the proportion by weight of B is from 0.05 to 3% by weight.

27 . The thermoplastic molding composition as claimed in claim 18 , characterized in that the proportion by weight of C is from 0.5 to 1.2% by weight.

28 . The thermoplastic molding composition as claimed in claim 18 , characterized in that the ratio by weight of component B used to component C used is from 3:1 to 1:15.

29 . A method of producing a molded object with a deep-black surface and high gloss comprising the step of molding the thermoplastic molding compositions as claimed in claim 18 wherein the molded object is an object for use in a motor vehicle, a household appliance, electrical equipment, a decorative strips, or outdoor cladding.

30 . A method as claimed in claim 29 wherein the molded object is an object for use in the exterior region of a motor vehicle selected from A-, B-, C-, or D-pillar cladding, a spoiler, a window frame, a cover strip, a hood, a panel, a part of a radiator grille, antenna cladding, of the side mirror, or a part of a front or rear lamp.

31 . A process as claimed in claim 18 , characterized in that components A, B, and C, and also optionally D, are mixed with one another.

Assignees

• Ineos Styrolution Group Gmbh

Inventors

• Bockmann Philipp
• Mosbach Norbert
• Jahnke Eike

Classifications

• C08K3/04 Primary

  Carbon · CPC title

• C08J5/00

  Manufacture of articles or shaped materials containing macromolecular substances (manufacture of semi-permeable membranes B01D67/00 - B01D71/00) · CPC title

• C08K3/013 Primary

  Fillers, pigments or reinforcing additives · CPC title

• C08L33/10

  Homopolymers or copolymers of methacrylic acid esters · CPC title

• C08L25/12

  with unsaturated nitriles · CPC title