Plastics Composition Comprising at least One Metal Pigment, Method for Production and Use Thereof

Patent metadata

Field	Value
Publication number	US-2016237275-A1
Application number	US-201415029057-A
Country	US
Kind code	A1
Filing date	Oct 14, 2014
Priority date	Oct 14, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

The present invention relates to a plastics composition which comprises at least one platelet-shaped metal pigment from a range of from 0.01 to 25 wt.-%, at least one light stabilizer from a range of from 0.01 to 10 wt.-% and at least one antioxidant from a range of from 0.01 to 2 wt.-%, in each case relative to the proportion by weight of the plastics composition.

First claim

1 . A plastics composition
comprising at least one platelet-shaped metal pigment in a quantity from a range of from 0.01 to 25 wt.-%, at least one light stabilizer in a quantity of from 0.01 to 10 wt.-%, and at least one antioxidant in a quantity of from 0.01 to 2 wt.-%, wherein the at least one light stabilizer and the at least one antioxidant are in quantities relative to the total weight of the plastics composition.

2 . The plastics composition according to claim 1 , wherein the at least one metal pigment is an iron pigment and/or an aluminum pigment.

3 . The plastics composition according to claim 1 , wherein the platelet-shaped metal pigment is coated with a silicon oxide, silicon hydroxide and/or silicon oxide hydrate layer.

4 . The plastics composition according to claim 1 , wherein the platelet-shaped metal pigment is an iron pigment which is coated with a silicon oxide, silicon hydroxide and/or silicon oxide hydrate layer, and further wherein the iron core of the iron pigment has an average thickness in a range of from 20 nm to less than 100 nm.

5 . The plastics composition according to claim 1 , wherein the average particle size D 50 of the metal pigment lies in a range of from 1 μm to 100 μm.

6 . The plastics composition according to claim 1 , wherein a plastics component of the plastics composition is selected from the group consisting of: polypropylene (PP), PP copolymers, polyethylene (PE), PE copolymers, high density polyethylene (HDPE), Low Density Polyethylene (LDPE), Linear Low Density Polyethylene (LLDPE), polystyrene (PS), styrene/acrylonitrile (SAN), high impact polystyrene (HIPS), acrylonitrile-butadiene-styrene (ABS), acrylonitrile-styrene-acrylate (ASA), polycarbonate (PC), polymer blends of PC/ABS, polymer blends of PC/ASA, polyoxymethylene (POM), polyamide, polyester, polyurethane, polymethyl methacrylate (PMMA), and mixtures thereof.

7 . The plastics composition according to claim 1 , wherein the light stabilizer is a sterically hindered amine (HALS) and/or a UV absorber.

8 . A method for producing the plastics composition according to claim 1 ,
wherein the method comprises: a) mixing the at least one metal pigment, the at least one light stabilizer and the at least one antioxidant with a plastics component, b) extruding the mixture from step a), and c) injection-molding the extrudate from step b) to form plates.

9 . The plastics composition according to claim 1 , wherein the plastics composition is present in granulated form.

10 . The plastics composition according to claim 1 , wherein the plastics composition is in the form of a film, plate or profile.

11 . The plastics composition according to claim 1 , comprising at least one platelet-shaped iron pigment coated with silicon oxide(s), silicon hydroxide(s) and/or silicon oxide hydrate(s).

12 . The plastics composition according to claim 1 , wherein the at least one platelet-shaped metal pigment is selected from the group consisting of iron pigments, iron alloy pigments, aluminum pigments, aluminum alloy pigments and mixtures thereof.

13 . The plastics composition according to claim 1 , wherein the at least one platelet-shaped metal pigment is surface modified with one or more silanes.

14 . The plastics composition according to claim 6 , wherein the plastics component comprises one or more of polyolefins, polystyrenes, polyesters, polyethers, polyamides, poly(meth)acrylates, thermoplastic polyurethanes, polysulfones, polyacetals, polyvinyl chloride, mixtures thereof or copolymers thereof.

15 . The plastics composition according to claim 6 , wherein the plastics component consists of polyvinyl chloride (PVC) and other vinyl chloride-based polymers.

16 . The plastics composition according to claim 1 , wherein the at least one light stabilizer is selected from the group consisting of 2-(2′-hydroxyphenyl)-benzotriazoles, 2-hydroxybenzophenones, acrylates, oxalic acid diamides, 2-(2-Hydroxyphenyl)-1,3,5-triazines, formamidines, sterically hindered amines, nickel light stabilizers, and mixtures thereof.

17 . The plastics composition according to claim 1 , wherein the at least one light stabilizer is selected from the group consisting of 2-(2H-benzotriazol-2-yl)-p-cresol, 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol, 2-(5-chloro-2H-benzotriazol-2-yl)-6-(1,1-dimethylethyl)-4-methylphenol, 2,4-di-tert-butyl-6-(5-chlorobenzotriazol-2-yl)phenol, 2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol, 2,2′-methylenebis-(6-(2H-benzotriazol-2-yl)-4,1,3,3-tetramethylbutyl)phenol, N-(2-ethoxyphenyl)-N′-(2-ethylphenyl)ethanediamide, 2-(2H-benzotriazol-2-yl)-6-dodecyl-4-methylphenol, branched and linear, 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[(hexyl)oxy]-phenol, 3-(diaryl)[1,3,5]triazin-2-yl)-5-(alkoxy-substituted) phenol, 2,4-bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-iso-octyloxyphenyl)-s-triazine, 4-[[[methylphenylamino]methylene]amino]benzoic acid ethyl ester, bis(2,2,6,6-tetramethylpiperid-4-yl) sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate+methyl 1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, decanedioic acid, bis(2,2,6,6-tetramethyl-1-(octyloxy)-4-piperidinyl) ester, reaction products with 1,1-dimethylethyl hydroperoxide and octane, poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidinyl)imino]-1,6-hexanediyl[(2,2,6,6-tetramethyl-4-piperidinyl)imino]], N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexanediamine, polymer with 2,4,6-trichloro-1,3,5-triazine, reaction product with N-butyl-1-butanamine and N-butyl-2,2,6,6-tetramethyl-4-piperidinamine, N,N′″-[1,2-ethane-diyl-bis [[[4,6-bis-[butyl (1,2,2,6,6-pentamethyl-4-piperidinyl)amino]-1,3,5-triazin-2-yl]imino]-3,1-propanediyl]]bis[N′,N″-dibutyl-N′,N″-bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-1,3,5-triazine-2,4,6-triamine, butanedioic acid dimethyl ester, polymer with 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol, bis(1,2,2,6,6-pentamethyl-4-piperidinyl)-[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butylmalonate and mixtures thereof.

18 . The plastics composition according to claim 1 , wherein the antioxidant is selected from the group consisting of: alkylated monophenols, alkylthiomethylphenols, hydroquinones, alkylated hydroquinones, tocopherols, hydroxylated thiodiphenyl ethers, alkylidene bisphenols, O-, N- and S-benzyl compounds, hydroxybenzylated malonates, aromatic hydroxybenzyl compounds, triazine compounds, benzylphosphonates, acylaminophenols, esters of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid with mono- or polyalcohols, esters of β-(5-tert-butyl-4-hydroxy-3-methylphenyl)propionic acid with mono-polyalcohols, esters of β-(3,5-dicyclohexyl-4-hydroxyphenyl)propionic acid with mono- or polyalcohols, esters of 3,5-di-tert-butyl-4-hydroxyphenylacetic acid with mono- or polyalcohols, amides of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, ascorbic acid, aminic antioxidants, and mixtures thereof.

19 . The plastics composition according to claim 1 , wherein the antioxidant is selected from the group consisting of: pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, tris(2,4-di-tert-butylphenyl)phosphite, tetrakis(2,4-di-tert-butylphenyl) [1,1-biphenyl]-4,4′-diylbisphosphonite, bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, 3,9-bis(2,4-bis(1,1-dimethylethyl)phenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro(5.5)undecane and mixtures thereof.

20 . The plastics composition according to claim 1 , wherein the a

Assignees

• Eckart Gmbh

Inventors

• Mäder Dietmar
• Schaal Martin
• Trenz Wolfgang

Classifications

• C09C1/62

  Metallic pigments or fillers {(C09C1/0015 takes precedence)} · CPC title

• C01P2006/60

  Optical properties, e.g. expressed in CIELAB-values · CPC title

• C08L69/00 Primary

  Compositions of polycarbonates; Compositions of derivatives of polycarbonates · CPC title

• C08K5/005 Primary

  Stabilisers against oxidation, heat, light, ozone · CPC title

• C08L23/12

  Polypropene · CPC title