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

Claim 0:
1. A method for improving UV resistance of a molding mass (P) comprising an organopolysiloxane compound (B) in comparison to a comparable molding mass (P) without the organopolysiloxane compound (B) subjected to the same artificial weathering, wherein the method comprises the step of compounding the following components with each other to make the molding mass (P):
(A) 80 to 99.5 wt.-% of at least one thermoplastic polymer composition (A) comprising:
(A-1) at least one graft copolymer (A-1); and
(A-2) at least one thermoplastic matrix (A-2) based on at least one vinylaromatic copolymer;

(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), 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.