US 11,667,780 B2
Impact modified styrene copolymer composition comprising polysiloxane additive having improved abrasion characteristics
Tobias Schulz, Cologne (DE); Norbert Niessner, Friedelsheim (DE); Janna Michaelis de Vasconcellos, Sprockhoevel (DE); Hans-Werner Schmidt, Bayreuth (DE); and Tristan Kolb, Bayreuth (DE)
Assigned to INEOS STYROLUTION GROUP GMBH, Frankfurt am Main (DE)
Appl. No. 16/633,278
Filed by INEOS STYROLUTION GROUP GMBH, Frankfurt am Main (DE)
PCT Filed Jul. 25, 2018, PCT No. PCT/EP2018/070136
§ 371(c)(1), (2) Date Jan. 23, 2020,
PCT Pub. No. WO2019/020677, PCT Pub. Date Jan. 31, 2019.
Claims priority of application No. 17183280 (EP), filed on Jul. 26, 2017.
Prior Publication US 2020/0148872 A1, May 14, 2020
Int. Cl. C08L 25/12 (2006.01); C08J 3/22 (2006.01)
CPC C08L 25/12 (2013.01) [C08J 3/226 (2013.01); C08J 2325/12 (2013.01); C08J 2413/00 (2013.01); C08J 2425/12 (2013.01); C08J 2483/04 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01)] 16 Claims
 
1. A thermoplastic polymer composition (P) comprising:
(A) 82 to 99.75 wt.-% of at least one styrene-based polymer composition (A) comprising:
(A-1) 30 to 40 wt.-%, based on the total weight of the styrene-based polymer composition (A), of at least two styrene-based graft copolymers (A-1), wherein the graft copolymer (A-1) is poly(acrylonitrile-styrene-acrylic ester) (ASA), wherein the graft copolymer (A-1) comprises at least two graft copolymers (A-1-I) and (A-1-II), wherein:
(i) graft copolymer (A-1-I) comprises ASA rubber particles having a mean particle diameter D50 from 50 to 180 nm, and
(ii) graft copolymer (A-1-II) comprises ASA rubber particles having a mean particle diameter D50 from 200 to 800 nm, and
(A-2) 60 to 70 wt.-%, based on the total weight of the styrene-based polymer composition (A), of a thermoplastic polymer (A-2) comprising 40 to 60 wt.-% of polystyrene-acrylonitrile) (SAN) and 60 to 40 wt.-% poly(α-methyl styrene-acrylonitrile) (AMSAN), based on the total weight of the thermoplastic polymer (A-2);
(B) 0.25 to 18 wt.-% of at least one organopolysiloxane compound selected from a poly(dialkylsiloxane) compound with each alkyl group independently comprising 1 to 10 carbon atoms and having a weight average molecular weight Mw of 100,000 g/mol to 1,000,000 g/mol, determined by gel permeation chromatography (GPC) relative to polystyrene as standard and THF as solvent;
(C) 0 to 10 wt.-% of at least one colorant, dye, or pigment; and
(D) 0 to 3 wt.-% of at least one further additive;
wherein the constituents (A) to (D) sum up to 100 wt.-% of the thermoplastic polymer composition (P).