Matting polymer composition having excellent weather resistance and impact resistance, and matte sheet including the same

1 . A matting polymer composition comprising:

(A) acrylate-styrene-acrylonitrile graft copolymer;

(B-1) first styrene-acrylonitrile copolymer;

(B-2) second styrene-acrylonitrile copolymer; and

(C) a matting agent;

wherein the first styrene-acrylonitrile copolymer and the second styrene-acrylonitrile copolymer have different acrylonitrile contents from each other; and

wherein the matting agent is prepared from a composition for reaction extrusion including polystyrene (PS), a styrene-acrylonitrile copolymer (SAN), a N-phenylmaleimide-based copolymer (PMI), an alicyclic epoxy compound, and an acid compound.

2 . The matting polymer composition of claim 1 ,

wherein the first styrene-acrylonitrile copolymer has an acrylonitrile content of 31 to 40 wt %, and the second styrene-acrylonitrile copolymer has an acrylonitrile content of 22 to 30 wt %.

3 . The matting polymer composition of claim 1 ,

wherein the alicyclic epoxy compound is selected from one or more compounds of a group consisting of 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexane-carboxylate, diethylene glycol bis(3,4-epoxycyclohexane-carboxylate), 2-ethyl-1,3-hexanediol bis(3,4-epoxycyclohexane-carboxylate), diethylene glycol bis(3,4-epoxy-6-methylcyclohexane-carboxylate), 3-methyl-1,5-pentanediol bis(3,4-epoxycyclohexane-carboxylate), 1,5-pentanediol bis(3,4-epoxycyclohexane-carboxylate), ethylene glycol bis(3,4-epoxycyclohexane-carboxylate), ethylene glycol bis(3,4-epoxy-6-methylcyclohexane-carboxylate), bis(3,4-epoxycyclohexylmethyl) oxalate, bis(3,4-epoxycyclohexylmethyl) succinate, bis(3,4-epoxycyclohexylmethyl) adipate, and 1,2,8,9-diepoxylimonene.

4 . The matting polymer composition of claim 1 ,

wherein the acid compound is any one or a combination of two or more compounds selected from a group consisting of R 1 COOH or R 2 SO 3 H, and salt compounds thereof,

wherein R 1 and R 2 are independently C 6-30 alkyl, C 6-30 aryl, or C 6-30 arC 6-30 alkyl.

5 . The matting polymer composition of claim 1 ,

wherein the composition for reaction extrusion includes 10 to 20 wt % of the polystyrene, 60 to 80 wt % of the styrene-acrylonitrile copolymer, 5 to 20 wt % of the N-phenylmaleimide-based copolymer, 1 to 6 wt % of the alicyclic epoxy compound, and 0.01 to 1.5 wt % of the acid compound.

6 . The matting polymer composition of claim 1 ,

wherein the matting polymer composition includes 50 to 90 parts by weight of the first styrene-acrylonitrile copolymer, 15 to 35 parts by weight of the second styrene-acrylonitrile copolymer, and 2 to 24 parts by weight of the matting agent, based on 100 parts by weight of the acrylate-styrene-acrylonitrile graft copolymer.

7 . The matting polymer composition of claim 6 ,

wherein a weight ratio between the first styrene-acrylonitrile copolymer and the second styrene-acrylonitrile copolymer is 1:0.1 to 0.5.

8 . The matting polymer composition of claim 1 ,

wherein the second styrene-acrylonitrile copolymer has a glass transition temperature of 110 to 130° C.

9 . The matting polymer composition of claim 8 ,

wherein the matting polymer composition includes 5 to 50 parts by weight of the first styrene-acrylonitrile copolymer, 30 to 100 parts by weight of the second styrene-acrylonitrile copolymer, and 2 to 24 parts by weight of the matting agent, based on 100 parts by weight of the acrylate-styrene-acrylonitrile graft copolymer.

10 . The matting polymer composition of claim 1 , further comprising: a third styrene-acrylonitrile copolymer having a weight average molecular weight of 4,000,000 g/mol or more.

11 . The matting polymer composition of claim 10 , wherein 1 to 6 parts by weight of the third styrene-acrylonitrile copolymer is included based on 100 parts by weight of the acrylate-styrene-acrylonitrile graft copolymer.

12 . A molded article manufactured by extruding or injecting the matting polymer composition of claim 1 .

13 . A sheet comprising: a base layer, and a skin layer formed by co-extruding and laminating the matting polymer composition of claim 1 on the base layer.

14 . The sheet of claim 13 ,

wherein the base layer is selected from one or more compounds of a group consisting of polyvinyl chloride (PVC), polypropylene (PP), polyacrylate, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polymethylmethacrylate (PMMA), polycarbonate (PC), polyamide, styrene-acrylonitrile copolymer (SAN), acrylonitrile-butadiene-styrene (ABS), acrylonitrile-styrene-acrylate (ASA), and a mixture thereof.