ABS THERMOPLASTIC MOLDING COMPOSITION FOR BLOW MOLDING
ABS thermoplastic molding compositions for the preparation of blow molded articles in the automotive and household sector comprising (A) 30 to 40 wt.-% ABS graft rubber copolymer, (B) 25 to 35 wt.-% alpha-methylstyrene/acrylonitrile copolymer, (C) 30 to 40 wt.-% styrene/acrylonitrile copolymer, (D) 0.05 to 0.50 wt.-% homo- or copolymer comprising monomer structure units with a C 3 -C 6 -alkyleneoxide side chain having an epoxy terminal group or with a modified, functionalized C 3 -C 6 -alkyleneoxide side chain, and (E) 0 to 5 wt.-% further additives. Component (D) is preferably polyglycidylmethacrylate.
1 .- 15 . (canceled)
16 . A thermoplastic molding composition comprising components A, B, C, D, and E:
(A) 30 to 40 wt.-% of at least one graft copolymer (A) consisting of 15 to 60 wt.-% of a graft sheath (A2) and 40 to 85 wt.-% of a graft substrate (A1), where (A1) and (A2) sum up to 100 wt.-%, wherein the graft substrate (A1) is at least one agglomerated butadiene rubber latex,
obtained by emulsion polymerization of
styrene and acrylonitrile in a weight ratio of 95:5 to 50:50 to obtain a graft sheath (A2), wherein the styrene and/or acrylonitrile is optionally partially replaced by alphamethylstyrene, methyl methacrylate, maleic anhydride, or mixtures thereof,
in the presence of the at least one agglomerated butadiene rubber latex (A1) with a median weight particle diameter D50 of 200 to 800 nm;
where the agglomerated rubber latex (A1) is obtained by agglomeration of at least one starting butadiene rubber latex (S-A1) having a median weight particle diameter D50 of equal to or less than 120 nm, with at least one acid anhydride;
(B) 25 to 35 wt.-% of at least one copolymer (B) of alpha-methylstyrene and acrylonitrile in a weight ratio of from 95:5 to 50:50, wherein the alpha-methylstyrene and/or acrylonitrile is optionally partially replaced by methyl methacrylate, maleic anhydride, and/or 4-phenylstyrene;
(C) 30 to 40 wt.-% of at least one copolymer (C) of styrene and acrylonitrile in a weight ratio of from 95:5 to 50:50, wherein the styrene and/or acrylonitrile is optionally partially replaced by methyl methacrylate, maleic anhydride, and/or 4-phenylstyrene;
wherein copolymer C has a weight average molar mass N w of 150,000 to 300,000 g/mol;
(D) 0.05 to 0.50 wt.-% of at least one homo- or copolymer (D) comprising structure units derived from at least one monomer with at least one C 3 -C 6 -alkyleneoxide side chain which epoxy group is the terminal group, or structure units derived from at least one monomer with at least one modified C 3 -C 6 -alkyleneoxide side chain having an ester, ether, carbonate, carbamate, hydroxyl, or acrylate terminal group which group has been formed by reaction with the terminal epoxy group of the C 3 -C 6 -alkyleneoxide;
(E) 0 to 5 wt.-% of further additives and/or processing aids (E);
where the components A, B, C, D, and, if present E, sum to 100 wt.-%.
17 . The thermoplastic molding composition according to claim 16 , comprising:
30 to 40 wt.-% component (A),
25 to 35 wt.-% component (B),
30 to 40 wt.-% component (C),
0.05 to 0.40 wt.-% component (D), and
0.01 to 5 wt.-% component (E).
18 . The thermoplastic molding composition according to claim 16 , wherein component (D) is a homo- or copolymer comprising structure units derived from at least one monomer with C3-C4-alkyleneoxide side chains having epoxy end groups.
19 . The thermoplastic molding composition according to claim 16 , wherein component (D) is selected from the group consisting of: polyglycidylmethacrylates, polyglycidylacrylates, polyglycidylethers, polyglycidylazides, polyglycidylamines and poly (C2-C6)-alkylene-co-glycidyl (meth)acrylates.
20 . The thermoplastic molding composition according to claim 16 , wherein component (D) is polyglycidylmethacrylate and/or polyethylene-co-glycidyl methacrylate.
21 . The thermoplastic molding composition according to claim 16 , wherein:
the graft sheath (A2) is obtained by emulsion polymerization of styrene and acrylonitrile solely;
the copolymer (B) is a copolymer of alpha-methylstyrene and acrylonitrile solely; and
the copolymer (C) is a copolymer of styrene and acrylonitrile solely.
22 . The thermoplastic molding composition according to claim 16 , wherein the agglomerated butadiene rubber latex (A1) has a median weight particle diameter D50 of 280 to 350 nm.
23 . The thermoplastic molding composition according to claim 16 , wherein the copolymer (B) is a copolymer of alpha-methylstyrene and acrylonitrile in a weight ratio of from 75:25 to 55:45.
24 . The thermoplastic molding composition according to claim 16 , wherein the copolymer (C) is a copolymer of styrene and acrylonitrile in a weight ratio of from 75:25 to 65:35.
25 . The thermoplastic molding composition according to claim 16 , wherein the copolymer C has a weight average molar mass M w of 170,000 to 230,000 g/mol.
26 . A process for the preparation of the thermoplastic molding composition according to claim 16 by melt mixing the components (A), (B), (C), (D) and, if present (E), and optionally further polymers (TP) at temperatures in the range of from 160° C. to 400° C.
27 . A method of using thermoplastic molding compositions according to claim 16 for the production of a molded article.
28 . A molded article made from the thermoplastic molding composition according to claim 16 .
29 . A method of using molded articles according to claim 28 for applications in the automotive and household sector.
30 . A method of using molded articles according to claim 28 as a front bumper protector or spoiler.