Patent ID: 11965066
Assignee: INEOS STYROLUTION GROUP GMBH
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 11:
12. A molding mass (P) comprising:
(A) 80 to 99.5 wt.-% of at least one thermoplastic polymer composition (A) comprising:
(A-1) 5 to 50 wt.-%, based on the thermoplastic polymer composition (A), of at least one graft copolymer (A-1) comprising or consisting of an acrylonitrile styrene acrylate (ASA) having an average particle size d50 of rubber particles in the ASA copolymer from 50 to 1000 nm, wherein the average particle size is determined by scattered light measurement;
(A-2) 20 to 95 wt.-%, based on the thermoplastic polymer composition (A), of at least one thermoplastic matrix (A-2) comprising 18 to 45 wt.-% of at least one vinyl cyanide and 55 to 82 wt.-% of at least one vinylaromatic; and
(A-3) 0 to 75 wt.-%, based on the thermoplastic polymer composition (A), of at least one additional thermoplastic polymer (A-3);

(B) 0.5 to 5 wt.-% of at least one organopolysiloxane compound (B);
(C) 0 to 10 wt.-% of at least one colorant, dye, or pigment (C); and
(D) 0 to 5 wt.-% at least one additive (D),
wherein the constituents (A) to (D) sum up to 100 wt.-% of the molding mass (P),
and wherein the molding mass (P) has at least one of the following:
(a) a color shift of the molding mass (P) subjected to artificial weathering according to PV3929 after 2400 h of below 70% of the color shift of a comparable molding mass (P) without an organopolysiloxane compound (B) subjected to artificial weathering according to PV3929 after 2400 h;
(b) a color shift of the molding mass (P) subjected to artificial weathering according to PV3929 after 3200 h of below 65% of the color shift of a comparable molding mass (P) without an organopolysiloxane compound (B) subjected to artificial weathering according to PV3929 after 3200 h;
(c) a color shift of the molding mass (P) subjected to artificial weathering according to PV3930 after 2400 h of below 80% of the color shift of a comparable molding mass (P) without an organopolysiloxane compound (B) subjected to artificial weathering according to PV3930 after 2400 h;
(d) a color shift of the molding mass (P) subjected to artificial weathering according to PV3930 after 3200 h of below 25% of the color shift of a comparable molding mass (P) without an organopolysiloxane compound (B) subjected to artificial weathering according to PV3930 after 3200 h; and/or
(e) a greyscale of the molding mass (P) after 3200 h of weathering according to PV3930 of at least 1 unit higher compared to a comparable molding mass (P) without an organopolysiloxane compound (B) subjected to the same artificial weathering.