Abstract: A device and method for forming an adaptive optic in the capsule of a human eye is disclosed, comprising a capsular interface enclosing an optically acceptable medium. The device establishes a physiologic range of optical power in response to a range of ciliary contractile states. The preferred bi-phasic medium of the device is comprised of a solid three dimensional polymeric network suspended in a liquid aqueous phase and bonded to a capsular interface. The polymeric network provides shape to the capsular interface, optical power, and a physiologic response to the suspensory ligament. The three dimensional network of the bi-phasic medium mimics the stacked fiber configuration and elasticity of a natural lens. An alternative embodiment utilizing a single phase medium is also disclosed with associated structural features provided in the capsular interface.

Abstract: The invention relates to a composition for production of a thermoplastic moulding compound, wherein the composition comprises or consists of the following constituents: A) 30% to 90% by weight of at least one polymer selected from the group consisting of aromatic polycarbonate, aromatic polyester carbonate and aromatic polyester, B) 5% to 65% by weight of polymer free of epoxy groups, consisting of B1) rubber-modified vinyl (co)polymer prepared by the emulsion polymerization method using a redox initiator system consisting of an organic oxidizing agent and a reducing agent and B2) optionally rubber-free vinyl (co)polymer, C) 0.

Abstract: An all-electronic high-throughput detection system can perform multiple detections of one or more analyte in parallel. The detection system is modular, and can be easily integrated with existing microtiter plate technologies, automated test equipments and lab workflows (e.g., sample handling/distribution systems). The detection system includes multiple sensing modules that can perform separate analyte detection. A sensing module includes a platform configured to couple to a sample well. The sensing module also includes a sensor coupled to the platform. The sensing module further includes a first electrode coupled to the platform. The first electrode is configured to electrically connect with the sensor via a feedback circuit. The feedback circuit is configured to provide a feedback signal via the first electrode to a sample received in the sample well, the feedback signal based on a potential of the received sample detected via a second electrode.

Abstract: The invention relates to a process for the production of thermoplastic moulding compounds, in particular for the production of acrylonitrile-butadiene-styrene (ABS), wherein at least a first reagent (11) and a second reagent (12) of the thermoplastic moulding compounds are fed to a loop conduit (29) which comprises a static mixer (36), wherein the reagents (11, 12) are pressed in loops through the loop conduit (29) and passing the static mixer (36), whereby the reagents (11, 12) are dispersed to form a dispersion (15) in the static mixer (36). The invention also relates to a thermoplastic moulding compound that is produced by the inventive process.

Abstract: The present disclosure relates to a thermoplastic transparent resin composition for a wheel rust cover. The thermoplastic transparent resin composition is excellent in transparency and impact strength and suitable for a vacuum compression thermal molding process. A thermoplastic transparent resin composition for a wheel rust cover includes 20 wt % to 60 wt % of a graft copolymer, 40 wt % to 70 wt % of a non-graft copolymer, and 3 wt % to 10 wt % of a processing aid, in which a total rubber content is 10 wt % to 25 wt %, a total methacrylic acid alkyl ester compound content is 34 wt % to 67 wt %, a total aromatic vinyl compound content is 16 wt % to 40 wt %, and a total vinyl cyan compound content is 0 wt % to 10 wt %.

Abstract: This invention relates to compositions comprised of diene-based elastomers containing an antioxidant comprised of a combination of tris(nonyl phenyl) phosphite (TNPP) and tetramethylethylene diamine (TMEDA). The invention further relates a rubber composition and to a polystyrene composite containing such elastomer compositions. The invention additionally relates to articles of manufacture thereof, including tires and polystyrene based articles. In one embodiment, the invention relates to a process of recovery of diene-based elastomer(s) from an organic solvent solution thereof by steam stripping the organic solvent therefrom in the presence of a combination of the TNPP and TMEDA.

Abstract: Thermoplastic polyolefins (TPOs) and/or thermoplastic vulcanizates (TPVs) are blended with low molecular weight propylene-dominated copolymers to provide polymeric compositions with an improved balance between processability and toughness. The compositions have improved processability by facilitating the ease with which a TPO or TPV, usually difficult to melt process, can be processed at high line speeds, which in turn improves the formation of the composition into articles.

Abstract: This invention relates to compositions comprised of diene-based elastomers containing an antioxidant comprised of a combination of tris(nonyl phenyl) phosphite (TNPP) and tetramethylethylene diamine (TMEDA). The invention further relates a rubber composition and to a polystyrene composite containing such elastomer compositions. The invention additionally relates to articles of manufacture thereof, including tires and polystyrene based articles. In one embodiment, the invention relates to a process of recovery of diene-based elastomer(s) from an organic solvent solution thereof by steam stripping the organic solvent therefrom in the presence of a combination of the TNPP and TMEDA.

Abstract: Process for manufacturing composite sheets based on PVC and a network of long fibers, said process comprising the following steps: dispersing PVC in powder form in said network; subjecting the dispersion to an alternating electric field with a sufficient intensity and for a sufficient time in order to distribute the powder in the network; and heating the dispersion under pressure until the powder forms a continuous matrix.

Abstract: Polymer composite implantable medical devices, such as stents, and methods of manufacturing such devices are disclosed.

Abstract: In one of its aspects the invention is directed to rubber modified thermoplastic resin compositions comprising discontinuous elastomeric phase particles derived from a unitary rubber substrate having at least a bimodal particle size distribution, wherein the elastomeric phase particles comprise a polymer having structural units derived from at least one (C1-C12)alkyl(meth)acrylate monomer and are dispersed in a rigid thermoplastic phase, wherein at least a portion of the rigid thermoplastic phase is grafted as a shell to elastomeric phase core particles, and wherein the rigid thermoplastic phase comprises structural units derived from at least one vinyl aromatic monomer, at least one monoethylenically unsaturated nitrile monomer and at least one (C1-C12)alkyl- or aryl-(meth)acrylate monomer.

Abstract: A transparent ABS resin composition of the present invention comprises: an acrylonitrile-butadiene-styrene graft (g-ABS) copolymer which is copolymerized by mixture of acrylate based monomer, styrene based monomer, and acrylonitrile based monomer (a2) on butadiene based rubber polymer (a1); and (B) a styrene-acrylonitrile based copolymer, satisfies a relation denoted by Equation 1 and Equation 2 below, and has excellent impact resistance, scratch resistance, and transparency: 0?|X?Y|?0.005??(Equation 1) 0?|X?Z|?0.005??(Equation 2) In the Equations, X is refractive index of the acrylonitrile-butadiene-styrene graft (g-ABS) copolymer, Y is refractive index of the butadiene based rubber polymer (a1), and Z is refractive index of the styrene-acrylonitrile based copolymer (B).

Abstract: The invention relates to a thermoplastic molding compound containing: a) 50 to 85 parts of one or more terpolymers based on acrylnitril, alpha-methylstyrene, and styrene as component A, said terpolymers consisting of: 5 to 30 wt. % styrene, 15 to 35 wt. % acrylnitril, 50 to 70 wt. % alpha-methylstyrene, and 0 to 5 wt. % additional copolymerizable monomers, b) 15 to 50 parts of one or more impact-modifying graft rubbers with an olefinic double bond in the rubber phase as component B, c) 0 to 45 parts of one or more copolymers based on styrene and acrylnitril as component C, said copolymers consisting of: 71 to 81 wt. % styrene, 29 to 19 wt. % acrylnitril, and 0 to 5 wt. % additional copolymerizable monomers, and optionally additives and fibrous and/or particulate fillers. The thermoplastic molding compound leads to a reduced yellowing of the produced molded body.

Abstract: A process for producing rubber modified polymers having an increased rubber phase volume, including feeding a vinyl aromatic monomer and an elastomer to a polymerization reactor to form a reaction mixture, polymerizing the reaction mixture, combining a copolymer to the polymerized reaction mixture to form a combined mixture, subjecting the combined mixture to further polymerization, and obtaining a rubber modified polymer product from the further polymerization.

Abstract: A transparent thermoplastic resin composition includes (A) a rubber-modified vinyl-based copolymer; and (B) a cyanated vinyl-aromatic vinyl-based copolymer, wherein the (A) rubber-modified vinyl-based copolymer includes a rubbery polymer having an average particle size of about 500 ? to about 1,900 ?, the (B) cyanated vinyl-aromatic vinyl-based copolymer has a glass transition temperature of about 105° C. or less, and a difference in index of refraction between the (A) rubber-modified vinyl-based copolymer and the (B) cyanated vinyl-aromatic vinyl-based copolymer is about 0.01 or less. The transparent thermoplastic resin composition can have excellent properties in terms of scratch resistance, transparency, and/or impact resistance.

Abstract: Provided herein re a composition and a coating or a device (e.g., absorbable stent) that includes a PEGylated hyaluronic acid and a PEGylated non-hyaluronic acid biocompatible polymer and the methods of use thereof.

Abstract: A high impact polystyrene (HIPS) is made from styrene monomer and 3 to 20 wt % of an elastomeric component phase including polybutadiene rubber and styrene butadiene copolymer. The HIPS has a 60 degree gloss of 90 or more, a Gardner drop of at least 10 in-lb, and an Izod impact strength of 1.8 ft-lb/in or more. The HIPS can have salami morphology with rubber particle size between 1 and 1.3 microns.

Abstract: Disclosed is a graft monomer composition for thermoplastic transparent resins, a composition for thermoplastic transparent resins using the same and a thermoplastic transparent resin that exhibits superior transparency and color at low rubber contents. According to the graft monomer composition, the composition for thermoplastic transparent resins and the thermoplastic transparent resin, although the content of rubber in final products increases or the content of rubber in graft copolymers in the preparation of final products increases, the copolymer surrounds the surface of rubber well, thus reducing haze, considerably improving transparency and exhibiting excellent natural color.

Abstract: A rubber material of a wiper blade for windshield wipers is described, which comprises a first rubber component of a first polarity and a second rubber component of a second greater polarity. To equalize the first and second polarities, the first rubber component is at least partially replaced by a chemically functionalized derivative.

Abstract: A thermoplastic resin composition includes (A) a transparent rubber modified aromatic vinyl copolymer including (a1) a graft copolymer including a core of a rubber based polymer and a shell formed on a surface of the core by graft polymerization of alkyl ester monomer, unsaturated nitrile monomer, and aromatic vinyl monomer; and (a2) a non-graft copolymer including a unit derived from an alkyl ester monomer; and (B) a low molecular weight acrylic copolymer with a weight average molecular weight of about 1,000 to about 10,000 g/mol. The thermoplastic resin composition can have a melt flow index of about 13 to about 35 g/10 min, a haze of about 2 to about 5%, and a Notch Izod impact strength of about 11 to about 15 kgf·cm/cm.

Abstract: The present invention relates to the use of mixtures comprising polymer types A, B and AB as or in adhesives, polymer type A being a copolyester prepared with cocondensation of unsaturated aliphatic dicarboxylic acids, polymer type B being a (meth)acrylate homopolymer and/or copolymer, and polymer type AB being a graft copolymer of polymer type A and polymer type B.

Abstract: Disclosed herein is a non-glossy rubber modified aromatic vinyl-vinyl cyanide copolymer and a method for continuously preparing the same. The copolymer comprises about 80 to about 93% by weight of an aromatic vinyl-vinyl cyanide copolymer grafted onto about 7 to about 20% by weight of a diene-based rubber, and a dispersed phase of the copolymer has an average rubber particle diameter of about 6 to about 20 ?m and a span of about 1.2 to about 2.8.

Abstract: A process for preparing a functionalized polymer composition and a functionalized polymer composition. The process comprises the steps of providing a hydrocarbon resin, a polyolefin and a graft monomer, and dispersing the hydrocarbon resin in the polyolefin, followed by adding the graft monomer under shear to prepare the functionalized polymer composition. The polyolefin can comprise a polyethylene polymer or a C3 to C40 polymer having a molecular weight (Mw) of at least 20000.

Abstract: Butadiene copolymers are brominated using certain quaternary ammonium tribromides as the brominating agent. The bromination process proceeds easily under mild conditions, and produces a brominated product that has excellent thermal stability.

Abstract: The invention described is a thermoplastic vulcanizate comprising dynamically-cured rubber, a functionalized thermoplastic polymer, and a functionalized hydrocarbon resin, which thermoplastic vulcanizate can be advantageously adhered to a polar substrate, for example by overmolding. In one or more embodiments of the present invention an article of commerce comprising: a) a polar substrate, and the b) a thermoplastic vulcanizate comprised of dynamically-cured rubber, a functionalized thermoplastic polymer, and a functionalized hydrocarbon resin; wherein said thermoplastic vulcanizate is adhered to the polar substrate is provided.

Abstract: Branched polymers including multi-branched polymers, functionalized branched polymers, star-branched polymers, and dendigraft polymers. Methods for the synthesis of branched polymers and method for the use of branched polymers in tire components are also included.

Abstract: The present invention provides a nanocomposite of a star branched elastomer and a clay. The nanocomposite can be a mixture of a halogenated star branched elastomer and a clay, desirably an exfoliated clay, suitable for use as an air barrier. The halogenated star-branched elastomer can be the primary halogenated elastomer in the blend, and a ratio of the star-branched elastomer to clay can be from 2:1 to 500:1.

Abstract: A thermoplastic resin composition for a refrigerator according to the present invention can include (A) about 20 to about 40 parts by weight of an acrylonitrile-butadiene-styrene graft copolymer resin prepared by grafting in emulsion polymerization about 60 to about 30% by weight of a monomer mixture comprising a cyanide vinyl compound and an aromatic vinyl compound to about 40 to about 70% by weight of a rubber polymer having an average particle size of about 0.1 to about 0.4 ?m; (B) about 1 to about 20 parts by weight of a styrenic copolymer comprising (b1) about 0 to about 75% by weight of a styrenic copolymer prepared by copolymerizing about 5 to about 20% by weight of a rubber polymer having an average particle size of about 0.

Abstract: Rubber-reinforced vinyl aromatic polymers having a strictly bimodal morphology, comprising from 55 to 90% by weight of a rigid polymeric matrix and from 10 to 45% by weight of a rubbery phase dispersed inside said rigid polymeric matrix, in the form of grafted and occluded particles and wherein said rubber particles consist of from 60 to 99% by weight of particles with a capsule or “core-shell” morphology and from 1 to 40% by weight of particles with a “salami” morphology, said percentages being measured on the basis of the weight of the rubber particles only.

Abstract: The present invention relates to a flame retardant styrene-based resin composition with high impact property. The styrene-based resin composition of the present invention comprises 1-30 parts by weight of a flame retardant, 0.5-15 parts by weight of a flame retardant aid and 0.1-15 parts by weight of a styrene-containing graft copolymer per 100 parts by weight of a base resin comprising a rubber-modified styrene-based copolymer and offers high impact property and good rigidity and fluidity, without appearance problem under a variety of processing conditions.

Abstract: Rubber-reinforced vinyl aromatic polymers having a strictly bimodal morphology, comprising from 55 to 90% by weight of a rigid polymeric matrix and from 10 to 45% by weight of a rubbery phase dispersed inside said rigid polymeric matrix, in the form of grafted and occluded particles and wherein said rubber particles consist of from 60 to 99% by weight of particles with a capsule or “core-shell” morphology and from 1 to 40% by weight of particles with a “salami” morphology, said percentages being measured on the basis of the weight of the rubber particles only.

Abstract: The present invention relates to modified polyolefins with atactic structural elements, to processes for preparation thereof and to the use thereof, especially as an adhesive or as a constituent of adhesives.

Abstract: A thermally stable brominated butadiene copolymer, such as brominated styrene/butadiene block copolymer, brominated random styrene/butadiene copolymer or brominated styrene/butadiene graft copolymer, preparation of the brominated butadiene copolymers, use of the brominated butadiene copolymers as a flame retardant additive and polymeric compositions, both foamed and non-foamed, that incorporate a flame-retarding amount of brominated butadiene copolymer.

Abstract: A polymer composition containing (a) a high impact polystyrene (HIPS) component with a block copolymer grafted to polystyrene, a rubbery conjugated diene content of one to seven weight percent based on HIPS weight, less than 10 weight-percent gel concentration, an average rubber particle size of between one and 0.01 micrometers, about 40 to about 90 volume percent of the rubber particles have diameters of less than about 0.4 microns and from about 10 to about 60 volume percent of the rubber particles have diameters between about 0.4 and about 2.5 microns, a majority of rubber particles with a core/shell morphology and a concentration that accounts for 10 to 70 weight-percent of the total polymer composition weight and one to five weight-percent rubbery diene based on total polymer composition weight; (b) from 10 to 70 weight percent of a general purpose polystyrene and from about 2 to about 80 weight-percent of a styrene block copolymer component, both based on total polymer composition weight.

Abstract: The invention relates to multiphase compositions of matter comprising at least an acrylic phase and a hydrocarbon phase, and more specifically to pressure sensitive adhesive compositions of matter of an acrylic-hydrocarbon polymer and an additional hydrocarbon component which has a molecular weight of at least 1,000 and may include one or both of an oligomeric hydrocarbon and a polymeric hydrocarbon.

Abstract: This invention discloses a process for synthesizing a hairy polymer particle which comprises the steps of (1) polymerizing a vinyl aromatic monomer by emulsion polymerization in an aqueous medium to produce core particles, (2) recovering the core particles from the aqueous medium, (3) dispersing the core particles in an organic solvent, (4) adding an organo-lithium compound to the dried core particles in the organic solvent to produce the hairless core initiator, and (5) utilizing the hairless core initiator to initiate the anionic polymerization of a conjugated diolefin monomer in an organic solvent to produce a solution of the hairy polymer particles. The hairy polymer nanoparticles can then be recovered from the organic solvent. These hairy polymer particles are comprised of (1) a core which is comprised of a polymer of a vinyl aromatic monomer and (2) hairs which are polymer chains of a conjugated diolefin monomer, wherein the hairs are covalently bonded to the core.

Abstract: A rubber-modified polymeric composition having predominately core-shell morphology is disclosed. The rubber-modified polymeric composition can be a polystyrene comprising styrene, polybutadiene, and a high-grafting initiator formed by contacting singlet oxygen with an olefin containing an allylic hydrogen or a diene to form a hydroperoxide or peroxide. The singlet oxygen can be formed by contacting ground state oxygen with a photo catalyst, such a photosensitive dye exposed to light.

Abstract: The present invention relates to thermoplastic molding compositions comprising a mixture of (A) from 30 to 69% by weight, based on the sum of components (A), (B) and (C), of a methyl methacrylate polymer, (B) from 30 to 69% by weight, based on the sum of components (A), (B) and (C), of a copolymer obtainable by polymerizing a styrenic monomer and a vinyl cyanide, and (C) from 1 to 40% by weight, based on the sum of components (A), (B) and (C), of a graft copolymer obtainable from (C1) from 60 to 90% by weight, based on (C), of a core obtainable by polymerizing a 1,3-diene and a styrenic monomer, (C2) from 5 to 20% by weight, based on (C), of a first graft shell, and (C3) from 5 to 20% by weight, based on (C), of a second graft shell composed of an alkyl (meth)acrylate polymer, with the proviso that the ratio of (C2) to (C3) is in the range from 2:1 to 1:2.

Abstract: A thermoplastic material has a) from 5% weight to 95% by weight, preferably from 10% by weight to 60% by weight, of vulcanized rubber in a subdivided form; b) from 5% by weight to 95% by weight, preferably from 40% by weight to 90% by weight, of at least one heterophase copolymer having a thermoplastic phase made from a propylene homopolymer or copolymer and an elastomeric phase made from a copolymer of ethylene with an ?-olefin, preferably with propylene; c) from 0% by weight to 90% by weight, preferably from 0% by weight to 50% by weight, of at least one ?-olefin homopolymer or copolymer different from b); the amounts of a), b) and c) being expressed with respect to the total weight of a)+b)+c). The thermoplastic material shows improved mechanical properties, in particular, improved elongation at break.

Abstract: The present invention is a rubber modified monovinylidene aromatic polymer composition which can be used in conventional thermoforming or other highly orienting forming or shaping processes to produce tough, cost effective, transparent containers or other packaging materials.

Abstract: Disclosed are polypropylene homopolymers, copolymers and mono and polyfunctional polypropylene derivatives as well as methods of preparing them. These polymers are prepared in the eresence of a metallocene catalyst and are isotactic. Applications using these polymers include but are not limited to, electrophotography toners, melt facture reduction agents, and compatibilizers.

Abstract: Disclosed herein is a non-glossy rubber modified aromatic vinyl-vinyl cyanide copolymer and a method for continuously preparing the same. The copolymer comprises about 80 to about 93% by weight of an aromatic vinyl-vinyl cyanide copolymer grafted onto about 7 to about 20% by weight of a diene-based rubber, and a dispersed phase of the copolymer has an average rubber particle diameter of about 6 to about 20 ?m and a span of about 1.2 to about 2.8.

Abstract: The present invention relates to a thermoplastic resin composition. In more particular, a thermoplastic resin of graft ABS polymer and heat-resistant copolymer contains acryl-based resin, peroxide-based additive, or cross-linking additive, so that the thermoplastic resin composition of the present invention is effective in processing of a colored heat resistant ABS resin by having excellent cold stress whitening reduction and strength property, without lowering other properties as well as giving excellence in hot-tool weldability, pigmentation and paint spread property which are more important in post process, and maintaining the mechanical property as well as giving excellent heat-resistance and low gloss property.

Abstract: The present invention provides a series of baroplastic materials, and systems and methods of making and using such baroplastic materials. In one aspect of the invention, polymeric particles are provided that can be used to produce baroplastic materials under certain pressures and/or below certain temperatures. In one set of embodiments, the polymeric particles include an inner “core” region and an outer “shell” region. In some cases, more than one “shell” region may be present. In another arrangement the particles can include materials, or domains, in nanoscale proximity with each other. Non-particulate materials can also be processed in accordance with the invention. In another aspect of the invention, the invention provides for polymeric particles that can be processed and/or recycled multiple times, without causing significant degradation or alteration in the physical and/or chemical properties of the polymer.

Abstract: The present invention relates to an acrylonitrile (ASA) type thermoplastic resin composition with excellent weatherability and appearance properties, and more particularly, to an acrylate-styrene-acrylonitrile type thermoplastic resin composition comprising a) an acrylate-styrene-acrylonitrile graft copolymer; b) a butadienc-acrylonitrile methylmethacrylate graft copolymer; c) a copolymer of aromatic vinyl compound and vinylcyanide compound; and d) an alkyl acrylate copolymer, which has remarkably improved appearance properties such as scratch resistance, color (color stability) and gloss as well as excellent basic properties and weatherability.

Abstract: A thermoplastic resin composition comprising 10 to 98 parts by weight of a graft polymer (1A) containing a rubber-like polymer (1G) having a diene unit content of 50% by weight or less, 2 to 50 parts by weight of a hydroxyl group-containing acrylic copolymer (1B) and 0 to 80 parts by weight of other thermoplastic resin (1F), wherein the rubber-like polymer (1G) is at least one selected from the group consisting of a diene-based rubber, a polyorganosiloxane-based rubber and an olefin-based rubber; and, a graft copolymer (2A) obtained by grafting a vinyl-based polymer to a (meth)acrylate-based rubber-like polymer (2G) expansion-treated with an acid group-containing copolymer latex (2K) wherein the (meth)acrylate-based rubber-like polymer contains two or more poly-functional monomer units.

Abstract: A thermally stable brominated butadiene copolymer, such as brominated styrene/butadiene block copolymer, brominated random styrene/butadiene copolymer or brominated styrene/butadiene graft copolymer, preparation of the brominated butadiene copolymers, use of the brominated butadiene copolymers as a flame retardant additive and polymeric compositions, both foamed and non-foamed, that incorporate a flame-retarding amount of brominated butadiene copolymer.

Abstract: The method for manufacturing a thermoplastic elastomer composition of the present invention comprises continuously feeding a mixture comprising pelletized olefinic resin (A), a pulverized product (B) obtained by pulverizing bulk olefinic rubber, and a crosslinking agent (C) into a continuous kneading machine, and performing a dynamic heat treatment to yield the thermoplastic elastomer composition. An olefinic thermoplastic elastomer composition having excellent tensile characteristics and molded appearance can be manufactured with high productivity by the method of the present invention.

Abstract: A process for manufacturing a thermoplastic elastomeric material includes the following steps: surface treating a vulcanized rubber in a subdivided form in order to provide radically transferable atoms or groups on its surface; grafting at least one vinyl monomer to the surface treated vulcanized rubber in the presence of at least one transition metal compound and at least one ligand so as to obtain a vinyl polymer grafted onto the surface of the vulcanized rubber in a subdivided form.

Abstract: Process for preparation of impact-resistant polystyrene from diene monomers and from styrene monomers via anionic polymerization, where 1) in a stage 1) a rubber solution is prepared from the diene monomers, or from the diene monomers and from the styrene monomers, using an alkali metal organyl compound as initiator and with concomitant use of a solvent, and then 2) in a stage 2), styrene monomer is added to the rubber solution, and the resultant mixture is polymerized anionically to give the impact-resistant polystyrene, ?and where, after stage 1) and prior to stage 2), an organylaluminum compound and an alkali metal hydride are added to the rubber solution.