Abstract: The thermoplastic ABS molding composition comprises at least one thermoplastic copolymer matrix A, at least one ABS-copolymer B, optionally one or more polymers C, and one or more additives D, wherein, in the thermoplastic ABS molding composition, in particular after thermoplastic processing by extrusion, thermoforming and/or injection molding, the grafted rubber of component B is present in form of small particles.

Abstract: The invention is directed to a process for producing a ABS composition comprising 30-80 wt.-% of copolymer A, 19.99-60 wt.-% of ABS-copolymer B, 0-40 wt.-% of polymer C and 0.01-20 wt.-% of additives D, having the steps: a) mixing the components A, B and D and optionally C, by using an extruder comprising: a first feeding zone FZ1, a preheating zone PZ, a mechanical dewatering zone DZ, in which component B is mechanically dewatered, and wherein: the mechanical dewatering zone DZ comprises at least one dewatering aperture, in particular for liquid water; in a second feeding zone FZ2, at least part of component A and optionally part of component D are fed, preferably in melt and/or solid form, to the ex-truder, in a degassing zone DG component A and/or component B are degassed, and b) removing the ABS molding composition from a discharge zone CZ of the extruder.

Abstract: A graft copolymer B composed of:5 B1: 45 to 70 wt.-% graftbase B1, obtainedby emulsion polymerization of: b11: 80 to 98.9 wt.-% Cl to C4-alkyl acrylate; b12: 1 to 19.9 wt.-% C9 to C22-alkyl(meth)acrylate; and b13: 0.1 to 10 wt.-% bi- or polyfunctional crosslinking monomer b13; B2: 30 to 55 wt.-% graft shell B2 obtained in presence of graft base B1 via emulsion 10 polymerization of: b21: 50 to 95 wt.-% vinylaromatic monomer b21, and b22: 5 to 50 wt.-% vinylcyan monomer b22; and thermoplastic molding compositions thereof can be used for applications in the automotive and construction industry.

Abstract: The invention is directed to a process for producing a ABS composition comprising 30-80 wt.-% of copolymer matrix A, 19.99-60 wt.-% of ABS-copolymer B, 0-40 wt.-% of polymer C and 0.01-20 wt.-% of additives D, having the steps: a) mixing the components A, B and D and optionally C, by using an extruder comprising: a first feeding zone FZ1, a mechanical dewatering zone DZ, in which component B is mechanically dewatered, and wherein: the mechanical dewatering zone DZ comprises at least one dewatering aperture, in particular for liquid water, wherein the mechanical dewatering DZ zone comprises one or more elements made of a stainless steel material; in a second feeding zone FZ2, at least part of component A and optionally part of component D are fed, preferably in melt and/or solid form, to the extruder, in a degassing zone DG component A and/or component B are degassed, and b) removing the ABS molding composition from a discharge zone CZ of the extruder.

Abstract: ABS molding composition with an improved surface quality comprising (A) 15 to 44.975 wt.-% graft copolymer (A)-consisting of 15 to 60 wt.-% graft sheath (A2) and 40 to 85 wt.-% agglomerated butadiene rubber latex (A1)-obtained by emulsion polymerization of styrene and acrylonitrile in the presence of rubber latex (A1) (D50 of 150 to 800 nm). (B) 55 to 84.975 wt.-% copolymer (B) of styrene and acrylonitrile having a molar mass Mw of 85.000 to 190,000 g/mol: (C) 0.015 to 0.40 wt.-% vinylidene fluoride copolymer (C): and (D) 0.01 to 5 wt.-% further additive/processing aid (D) different from (C): can be used in painting or (electro)plating applications of thermoplastics.

Abstract: The present invention is directed to a process for the production of graft copolymer compositions which are based on acrylonitrile-styrene-acrylate (ASA) or acrylonitrile-butadiene-styrene (ABS) graft copolymers. The graft copolymers compositions are obtained by emulsion polymerization and afterwards precipitation, dewatering, drying and optionally cooling of the dried graft copolymer powder, wherein the graft copolymer B powder obtained is mixed with an aeration gas, preferably air and/or nitrogen, wherein the bulk density of the graft copolymer B powder is equal or less than 98.5% of the bulk density of the non-aerated graft copolymer B, during the whole aeration step. The graft copolymer powders show higher powder flowability and less tendency of caking during storage, for example in a silo.

Abstract: The present invention relates to a process for producing a thermoplastic molding composition and articles made thereof having improved surface quality, in particular improved surface quality after exposure to warm-humid environmental conditions. The thermoplastic molding composition comprises a thermoplastic polymer A, a graft copolymer B obtained by emulsion graft polymerization and optionally a further polymer component P, as well as optional further components/additives K, wherein at least one crystallization additive C, selected from phosphate compounds having 1 to 25 phosphate units, organic acids and salts thereof, is added during or after the preparation of the graft copolymer B.

Abstract: The invention relates to a polymer composition (P), comprising at least one acrylonitrile-butadiene-styrene copolymer (A) (ABS copolymer (A)), characterized in that the polymer composition (P) has a surface energy of >38 dyne/cm. The invention further relates to a process for painting a surface of a polymer moulded article comprising the polymer composition (P), wherein no pre-treatment of the surface of the polymer moulded article, such as primer coating, is required prior to the application of the paint.

Abstract: High heat resistant ABS molding compositions for use in the automotive sector, electronics, and household or healthcare sector comprising: (A) 15 to 35 wt.-% ABS graft copolymer (A); (B) 15 to 35 wt.-% a-methylstyrene/acrylonitrile copolymer (B) (weight ratio 95:5 to 50:50); (C) 20 to 40 wt.-% styrene/acrylonitrile copolymer (C) (weight ratio 95:5 to 50:50; Mw 150,000 to 300,000); (D) 10 to 30 wt.-% random terpolymer (D) made from 13 to 27 wt.-% ?, ? ethylenically unsaturated cyclic anhydride, 60 to 74 wt.-% aromatic vinyl monomer, and 13 to 27 wt.-% maleimide monomer); (E) 0.1 to 5 wt.-%, of at least one elastomeric block copolymer (E) comprising a vinylaromatic monomer block S and an elastomeric random diene/vinylaromatic onomer block B/S; hard phase proportion is 1 to 40 vol.-% and the diene proportion is less than 50 wt.-%; and (F) 0 to 5 wt.-% of further additives and/or processing aids (F).

Abstract: An emulsion polymerization process for preparation of ABS graft copolymer latex having reduced residual monomer content, wherein a grafting step c) comprises the steps: c1): feeding of 10 to 45 wt.-% of styrene and acrylonitrile in one portion to agglomerated butadiene rubber latex and addition of redox system initiator, then polymerization; c2): feeding remaining monomers in portions or continuously and further addition of redox system initiator; c3): addition of inorganic free radical initiator and continuation of polymerization, leads to ABS graft copolymers and thermoplastic molding compositions which can be used in the automotive industry.

Abstract: The invention relates to a process for producing graft copolymers based on acrylonitrile-butadiene-styrene copolymers (ABS), wherein the graft copolymers may be dewatered particularly readily after production and precipitation and have a low residual moisture content after centrifugation. The invention further relates to a process for producing thermoplastic molding materials using the thus obtained ABS graft copolymers.

Abstract: A thermoplastic molding composition comprising (A) 15 to 45 wt.-% graft copolymer (A) obtained by emulsion polymerization of styrene and acrylonitrile in presence of an agglomerated butadiene rubber latex (A1) with D50 of 150 to 800 nm; (B) 40 to 75 wt.-% copolymer (B) of styrene and acrylonitrile having a weight ratio of 80:20 to 65:35 and Mw of 150,000 to 300,000 g/mol, (C) 2.0 to 5.0 wt.-% elastomeric block copolymer (C) made from 15 to 65 wt.-% diene, and 35 to 85% by weight vinylaromatic monomer; (D) 2.0 to 5.0 wt.-% titanium dioxide pigment D comprising at least 95 wt.-% titanium dioxide and 1.7 to 3.3 wt.-% alumina; and (E) 0 to 7.0 wt.-% of at least one additive/processing aid (E) different from (D); having a high chemical resistance, high color and thermal stability and low tendency to delamination. This can be used for sheet extrusion and thermoforming, in particular as inner liner for a cooling apparatus.

Abstract: Acrylonitrile-Butadiene-Styrene molding compositions having improved organoleptic properties comprising a rubber modified vinylaromatic copolymer composition obtained by mass (bulk) or solution polymerization in a continuous process, and use of these molding compositions for various applications (e.g. automotive parts) are described.

Abstract: ABS molding composition comprising: (a) 50 to 80 wt.-% SAN copolymer (a) (S/AN ratio 78:22 to 65:35, Mw 80,000 to 250,000); (b) 8 to 25 wt.-% graft copolymer (b) consisting of 15 to 60 wt.-% graft sheath (b2) and 40 to 85 wt.-% graft substrate—an agglomerated butadiene rubber latex—(b1), obtained by emulsion polymerization of SAN in presence of agglomerated butadiene rubber latex (b1) (D50 150 to 800 nm); and (c) 8 to 30 wt.-% SBC block copolymer (vinylarene 58 to 68 wt.-%) comprising diene/vinylarene tapered polymer blocks; exhibiting ultra-high flow melt with good mechanical properties, a process for their preparation and their use for the production of bulky and/or thin walled articles.

Abstract: The present invention relates to thermoplastic molding compounds F containing at least two graft rubbers P-I and P-II which are processed by the co-precipitation of a mixture of the respective emulsions containing P-I and P-II. The present invention further relates to a method for producing such thermoplastic molding compounds F and to molded bodies obtained from a thermoplastic molding compound F according to the invention.

Abstract: Thermoplastic molding composition comprising (A) 40 to 80 wt.-% SAN copolymer (S/AN-ratio 78:22 to 65:35, Mw 80,000 to 250,000 g/mol); (B) 20 to 60 wt.-% SBC block copolymer (monovinylarene 61 to 64 wt.-%) comprising conjugated diene/monovinylarene tapered polymer blocks; and (C) 0 to 5 wt.-% additives and/or processing aids (C); exhibiting ultra-high melt flow with good mechanical, thermal and optical properties, a process for its preparation and its use for the production of bulky and/or thin walled articles.

Abstract: The present invention relates to a process for producing a thermoplastic moulding composition comprising a thermoplastic copolymer A, a graft copolymer B and optionally a further polymer component C as well as optional further additives K, wherein the preparation of the graft copolymer B is carried out via emulsion polymerization, and wherein at least one surfactant S2 is used in grafting step of emulsion polymerization in a volume concentration in the range of 0.46 to 0.75 mol/m3, based on the volume of the graft copolymer B latex particles obtained; and wherein the mean particle diameter Dw of the latex particles of graft copolymer B is in the range of 60 to 800 nm.

Abstract: A heat resistant ABS thermoplastic molding composition with reduced odor can be employed for automotive interior applications if it comprises a graft copolymer (A) based on a diene rubber latex substrate with a SAN graft sheath; a SAN matrix polymer (B) and specific amounts of additives such as fatty acid amides or fatty acid esters,metal oxides such as MgO, CaO or ZnO, antioxidants and a silicon oil having a kinematic viscosity in the range of from 25000 to 80000 centi Stokes.

Abstract: The present invention relates to a process for producing a thermoplastic moulding composition comprising a thermoplastic copolymer A, a graft copolymer B and optionally a further polymer component C as well as optional further additives K, wherein the preparation of the graft copolymer B is carried out via emulsion polymerization, and wherein at least one surfactant S2 issued in grafting step of emulsion polymerization in a volume concentration in the range of 0.46 to 0.75 mol/m3, based on the volume of the graft copolymer B latex particles obtained; and wherein the mean particle diameter Dw of the latex particles of graft copolymer B is in the range of 60 to 800 nm.

Abstract: The present invention is directed to a process for the production of graft copolymer compositions which are based on acrylonitrile-styrene-acrylate (ASA) or acrylonitrile- butadiene-styrene (ABS) graft copolymers. The graft copolymers compositions are obtained by emulsion polymerization and afterwards precipitation, dewatering, drying and optionally cooling of the dried graft copolymer powder, wherein the graft copolymer B powder obtained is mixed with an aeration gas, preferably air and/or nitrogen, wherein the bulk density of the graft copolymer B powder is equal or less than 98.5% of the bulk density of the non-aerated graft copolymer B, during the whole aeration step. The graft copolymer powders show higher powder flowability and less tendency of caking during storage, for example in a silo.