Abstract: A process for enhancing the melt strength of polypropylene by extruding said polypropylene in a twin-screw extruder, under inert atmosphere, at a temperature between about 150° C. and about 300° C., and in the presence of about 0.1 to about 3.0 wt %, based on the weight of the polypropylene, of a para-substituted dibenzoyl peroxide.

Abstract: A packer unit to be used in an annular blowout preventer. The packer unit includes an elastomer body including a compound of a nitrile rubber base polymer having a polymer chain, and a quantity of fluorine atoms attached to the polymer chain. The compound includes between 50 and 60% of the nitrile elastomer, between 25 to 35% carbon black, and the rest includes other materials. The quantity of fluorine atoms comprises short-chain fluorocarbon chain molecules The quantity of fluorine atoms displaces at least an equal quantity of hydrogen atoms from the polymer chain when the elastomer body is fluorinated.

Abstract: This invention relates to methods for producing an alkene terminated polystyrene, including: contacting a styrenic block copolymer and an alkene in the presence of a metathesis catalyst under conditions sufficient to produce an alkene terminated polystyrene having an unsaturation functionality of at least 0.7 and a MWD of about 1.5 or less. Methods for producing functionalized polymers and polyethylene blend composition comprising these functionalized polymers are also disclosed.

Abstract: The invention provides a vinyl ether group-containing copolymer, preparation process and use thereof. The copolymer comprises of the structural units represented by the following general formulae I, II and III, wherein, R1 is O or HN, R2 is an alkyl group with a carbon atom number of 1-4, cyclohexyl or a group represented by the following general formula IV (m represents a positive integer of 1-3), n is a positive integer of 1-4, the molar numbers of the structural units represented by the general formulae I, H and III are x, y and z, respectively, and x:y:z=3-8:1-4:1-5, the weight average molecular weight of the copolymer is 5000-20000. A color light blocking agent added with the copolymer can increase sensitivity. Furthermore, the copolymer has solubility in an alkaline solution, and thus, the color light blocking agent added with the copolymer has a superior developing property.

Abstract: Disclosed is a method for producing a modified propylene polymer that exhibits low flowability and also exhibits little fluctuation in melt flow rate compared with the melt flow rate of the propylene polymer before modification, the method involving a heat treatment step of subjecting a mixture comprising 100 parts by weight of a propylene polymer (A), from 0.1 to 50 parts by weight of an ethylenically unsaturated bond-containing compound (B), and from 0.01 to 20 parts by weight of an organic peroxide (C) whose decomposition temperature at which the half-life thereof becomes 1 minute is lower than 120° C. to heat treatment by using an extruder at a temperature lower than the decomposition temperature of the organic peroxide (C) at which the half-life thereof becomes 1 minute.

Abstract: This invention relates to methods for producing an alkene terminated polystyrene, including: contacting a styrenic block copolymer and an alkene in the presence of a metathesis catalyst under conditions sufficient to produce an alkene terminated polystyrene having an unsaturation functionality of at least 0.7 and a MWD of about 1.5 or less. Methods for producing functionalized polymers and polyethylene blend composition comprising these functionalized polymers are also disclosed.

Abstract: The disclosed is a comb-shaped graft copolymer, including a back bone of PMMA and side chains of a random copolymer, a block copolymer, or a homopolymer polymerized of a monomer having a carbon-carbon double bond. The monomer can be alkyl acrylate, styrene, and the likes. The side chains terminal is grafted to a nitro-oxy compound.

Abstract: The present disclosure relates to bone cement formulations that have an extended working time for use in vertebroplasty procedures and other osteoplasty procedures together with cement injectors that include energy delivery systems for on-demand control of cement viscosity and flow parameters. The bone cement formulations may include a liquid component having at least one monomer and a non-liquid component including polymer particles and benzoyl peroxide (BPO). The non-liquid component may be further configured to allow controlled exposure of the BPO to the liquid monomer so as to enable control of the viscosity of the bone cement composition.

Abstract: The present invention relates to a novel multi functional additive grafted rubber. More particularly the present invention relates to novel grades of rubber and in particular to chemically grafted with cardanol (meta-penta decenyl phenol) and/or its derivatives. Importantly the rubber grades of the invention involve chemically anchored/grafted selective meta alkenyl phenol and/or its derivatives in the backbone of natural or synthetic rubber. Importantly, such rubber variant of the invention have high plasticity, lower Mooney and melt viscosities, better cure properties as compared to conventional virgin natural rubber or natural rubber plasticized with aromatic process oils.

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: Provided is a multi-arm (greater than 3 arms) star ethylene polymer (sEP). The multi-arm star ethylene polymer is a polymer of an ethylene/maleic anhydride copolymer (EMAC) grafted with vinyl-terminated polyethylene. There are also provided a process for making the sEP and blend of a matrix ethylene polymer and the sEP.

Abstract: A cross-linking system which includes at least; one organic peroxide having a half-life of one hour at any temperature selected in the range from 80 DEG C. to 115 DEG C., and a cross-linking coagent, the half-life of said peroxide being measured by dissolving the peroxide in n-dodecane having a concentration of 0.2 mol/l. Said system enables, when added to a polymer, quick cross-linking of said polymer. The system is in particular suitable for encapsulating photovoltaic modules; in particular, the system can be used to improve the productivity of the method for manufacturing said modules.

Abstract: The present invention relates to a crosslinked poly(meth)acrylic acid nitroxide compound resulting from crosslinking of a poly(meth)acrylic acid nitroxide compound, and an object of the present invention is to provide a method of inexpensively and easily producing a crosslinked poly(meth)acrylic acid nitroxide compound having a high radical concentration. The present invention is a method of producing a crosslinked poly(meth)acrylic acid nitroxide compound including a repeating unit represented by the general formula (2): (in the formula, R represents a hydrogen atom or a methyl group), comprising a nitroxidation step carried out in a state that a crosslinked poly(meth)acrylic acid imino compound resulting from crosslinking of a poly(meth)acrylic acid imino compound including a repeating unit represented by the general formula (1): (in the formula, R represents the same group as that represented by R in said general formula (2)) is dispersed in water.

Abstract: The invention provides a golf ball having a core formed by vulcanizing a rubber composition and a cover composed primarily of a polyurethane material. The rubber composition of the core includes 100 parts by weight of a base rubber, from 10 to 40 parts by weight of an unsaturated carboxylic acid or a metal salt thereof, a peroxyketal (a) and a monophenol-type antioxidant (b), the weight ratio (a)/(b) of the peroxyketal to the monophenol-type antioxidant being from 5 to 50. The ball has an excellent discoloration resistance and an outstanding distance and feel on shots taken with a middle iron.

Abstract: The invention provides a composition containing (A) one or more (meth)acrylate compounds selected from among a (meth)acryl-modified silicone fluid, a long-chain alkyl(meth)acrylate, and a polyalkylene glycol(meth)acrylate having a number average molecular weight of 400 or more; (B) a (meth)acrylate compound having an alicyclic hydrocarbon group which has six or more carbon atoms and which is bonded to the compound via an ester bond; (C) (meth)acrylic acid or a (meth)acrylate compound having a polar group; and (D) a radical polymerization initiator. The composition is suitably employed as a raw material for, for example, an encapsulating material or a lens, exhibits transparency and heat resistance comparable to conventional levels, and provides a cured product exhibiting excellent adhesion to a base member surrounding the cured product.

Abstract: Disclosed are high impact polystyrenes prepared using mixed initiators. The mixed initiators include at least one grafting initiator and one non-grafting initiator. The high impact polystyrenes prepared therewith have a continuous polystyrene phase and dispersed therein particles of rubber predominantly having a honeycomb structure of rubber with polystyrene inclusions.

Abstract: A chemical two-component mortar compound including a resin component (A) that contains at least one radically curable, ethylenically unsaturated compound (a) as the curable component, and including a separately arranged so as to inhibit reaction curing component (B) that contains a curing agent for the resin of the resin component (A), with improved adhesion to the surface of partially cleaned and/or moist holes in mineral substrates, characterized by a content of 0.

Abstract: The present invention relates to a novel multi functional additive grafted rubber. More particularly the present invention relates to novel grades of rubber and in particular to chemically grafted with cardanol (meta-penta decenyl phenol) and/or its derivatives. Importantly the rubber grades of the invention involve chemically anchored/grafted selective meta alkenyl phenol and/or its derivatives in the backbone of natural or synthetic rubber. Importantly, such rubber variant of the invention have high plasticity, lower Mooney and melt viscosities, better cure properties as compared to conventional virgin natural rubber or natural rubber plasticised with aromatic process oils.

Abstract: A polypropylene derivative is provided. The polypropylene derivative includes a reactive monomer grafted on polypropylene, with a grafting yield exceeding 5%. A method for preparing the polypropylene derivative is also disclosed. The method includes mixing a reactive monomer, polypropylene and a compatibilizer to prepare a polypropylene derivative grafted with the reactive monomer, with a grafting yield exceeding 5%.

Abstract: The present invention provides a solid golf ball comprising a hot-molded product of a rubber composition comprising (a) 100 parts by weight of a polybutadiene synthesized using a rare-earth catalyst and having a cis-1,4 content of at least 60% and a 1,2 vinyl content of at most 2%, having a viscosity ? at 25° C. as a 5 wt % solution in toluene of up to 600 mPa·s, and having Mooney viscosity (ML1+4 (100° C.)) of more than 30, (b) 0.01 to 0.5 parts by weight of a sulfur, (c) 10 to 60 parts by weight of an unsaturated carboxylic acid and/or a metal salt thereof, (d) 0.1 to 5 parts by weight of an organosulfur compound, (e) 5 to 80 parts by weight of an inorganic filler, and (f) 0.1 to 5 parts by weight of an organic peroxide, wherein the hot-molded product has a difference in JIS-C hardness between the center and surface thereof of more than 20 and up to 40. The solid golf balls of the invention have a soft feel upon impact and excellent rebound characteristics.

Abstract: A golf ball, typically its core, is manufactured by molding and vulcanizing a rubber composition comprising a base rubber, an unsaturated carboxylic acid or a metal salt thereof, an inorganic filler, an organic peroxide, and an organosulfur compound. The base rubber contains a polybutadiene having a Mw of 60–150×104 and a Mw/Mn of up to 2.0 and containing at least 98% of cis-1,4 bonds and up to 1.5% of trans-1,4 bonds. The composition is easy to mold and work, and the golf ball has good rebound and improved flight performance.

Abstract: A golf ball has a core obtained by molding and vulcanizing a rubber composition comprising (A) a base rubber which includes a polybutadiene having a cis-1,4 content of at least 60 wt %, (B) an unsaturated carboxylic acid and/or metal salt thereof, (C) an inorganic filler and (D) at least one organic peroxide selected from among 1,1-bis(t-hexylperoxy)cyclohexane, 1,1-bis(t-hexylperoxy)-3,3,5-trimethylcyclohexane, and 2,2-bis(4,4-di-t-butylperoxycyclohexyl)propane. The golf ball has excellent rebound characteristics and flight performance as well as a high productivity due to a reduced vulcanization time.

Abstract: The invention relates to a suspension polymerization process for the preparation of styrene-containing (co)polymers, wherein the process comprises the steps of continuously or semi-continuously dosing an initiator to the reaction mixture, said initiator having a specified half-life at the temperature of the reaction mixture to which it is dosed. The invention further relates to styrene based (co)polymer obtainable by said process, and to the use of said styrene (co)polymer in a shaping process.

Abstract: A golf ball is characterized by comprising a molded and vulcanized product of a rubber composition as a constituent component, the rubber composition comprising 100 pbw of a base rubber including 60–100 wt % of a polybutadiene containing at least 60 wt % of cis-1,4-bond, having a Mooney viscosity (ML1+4 (100° C.)) of at least 40, and synthesized using a rare-earth catalyst, 10–60 pbw of an unsaturated carboxylic acid and/or a metal salt thereof, 0.1–5 pbw of an organosulfur compound, 5–80 pbw of an inorganic filler, and at least two organic peroxides including an organic peroxide having the shortest half-life at 155° C. designated (a) and another organic peroxide having the longest half-life at 155° C. designated (b), a ratio of half-lives (bt/at) being from 7 to 20 wherein at is the half-life of (a) and bt is the half-life of (b), a total content of the organic peroxides being 0.1–0.8 pbw per 100 pbw of the base rubber.

Abstract: It has been discovered that certain compounds serve as particle size regulators when employed together with peroxide initiators for the polymerization of vinylaromatic monomers in the presence of diene polymers. Suitable compounds that can control particle size include, but are not necessarily limited to, cobalt naphthenate, zinc naphthenate, iron octoate, calcium octoate, zinc octoate, zinc neodecanoate, potassium octoate, copper naphthenate, calcium versalate, and the like. Use of these metal carboxylates when vinylaromatic monomers are polymerized in the presence of polybutadienes and peroxide initiators results in reduced polybutadiene particles. Grafting and morphology characteristics may also be improved.

Abstract: There is provided a process for producing a modified polyolefin resin, which comprises the step of melt kneading at least the following components (A), (B) and (C): (A) 100 parts by weight of a polyolefin resin, (B) from 0.1 to 20 parts by weight of a compound containing an amino group and an unsaturated bond, and (C) from 0.01 to 20 parts by weight of an organic peroxide.

Abstract: A process for modifying a polypropylene (co)polymer wherein said process comprises melt mixing the polypropylene (co)polymer in the presence of an initiator wherein said initiator is selected from the group defined by formula (1), wherein R is selected from the group consisting of optionally substituted C1 to C18 acyl, optionally substituted C1 to C18 alkyl, aroyl defined by formula (2), and compounds of formula (3), wherein U, V, X, Y, Z, U?, V?, X?, Y? and Z? are independently selected from the group consisting hydrogen; halogen; C1-C18 alkyl; C1-C18 alkoxy, aryloxy, acyl, acyloxy, aryl, carboxy, alkoxycarbonyl, aryloxycarbonyl, trialkyl silyl, hydroxy, or a moiety of formula (4), and wherein T is alkylene.

Abstract: A golf ball is characterized by comprising a molded and vulcanized product of a rubber composition as a constituent component, the rubber composition comprising 100 pbw of a base rubber composed primarily of a polybutadiene containing at least 60 wt % of cis-1,4-bond, having a Mooney viscosity (ML1+4, 100° C.) of at least 30, and synthesized using a rare-earth catalyst, 15-50 pbw of an unsaturated carboxylic acid and/or a metal salt thereof, at least 2 pbw of a processing aid having a highest melting point of up to 115° C., and at least two organic peroxides including an organic peroxide having the shortest half-life at 155° C. designated (a) and another organic peroxide having the longest half-life at 155° C. designated (b), a ratio of half-lives (bt/at) being at least 7 wherein at is the half-life of (a) and bt is the half-life of (b), a total content of the organic peroxides being 0.1-0.9 pbw per 100 pbw of the base rubber.

Abstract: A curing composition of a fluororubber comprising a fluororubber which is curable with an organic peroxide, for example, an iodine-containing fluororubber, a polyfunctional unsaturated compound, and an organic peroxide, for example, dicumyl peroxide, in which the total amount of acetone and tert.-butanol contained in the decomposed products of the organic peroxide, which are generated at a curing temperature, is 2 moles or less per one mole of the decomposed products.

Abstract: A curing composition of a fluororubber comprising a fluororubber which is curable with an organic peroxide, for example, an iodine-containing fluororubber, a polyfunctional unsaturated compound, and an organic peroxide, for example, dicumyl peroxide, in which the total amount of acetone and tert.-butanol contained in the decomposed products of the organic peroxide, which are generated at a curing temperature, is 2 moles or less per one mole of the decomposed products.

Abstract: The bondability of a polyolefin, particularly to cyanoacrylate adhesives, is improved by incorporating in the polyolefin a polymerization initiator capable of initiating the polymerization of the monomers constituting the cyanoacrylate adhesive. The polymerization initiator may, for example, be a sterically hindered nitrogen base and may be mixed with the polyolefin at a temperature above the polyolefin's glass transition temperature using, for example, co-extrusion or co-injection methods.

Abstract: Rubber aircraft parts are made of the cured form of a curable composition comprising a perfluoropolyether polymer having a perfluoropolyether backbone and at least one reactive group, a crosslinking agent for crosslinking the polymer, and a silica filler having an average particle size of 0.001-10 &mgr;m. By providing dramatically improved sealability at low temperatures of −25 to −55° C., particularly during use in a dynamic state, and much improved resistance to amines and other chemicals, such rubber parts can ensure the reliable sealability of fluid line junctions in jet engines.

Abstract: Process for the preparation of modified polypropylene which can be used as compatibilizing agent, consisting in reacting the polymer with maleic anhydride in the presence of dilaurylperoxide and in the absence of a solvent.

Abstract: A copolymer of isobutylene with 0.5 to 15 mole percent of a conjugated diene (i.e., a butyl rubber) is reacted with a silane having both an alkenyl group as well as at least two silicon-bonded hydrolyzable group, the reaction taking place in the presence of a free-radical generator, to provide a modified copolymer having reactive silyl groups grafted thereto. The modified copolymer exhibits a reduced molecular weight relative to the starting copolymer and may be used to formulate moisture-curable sealants, caulks, adhesive and coatings.

Abstract: A (meth)acrylic premix comprising a (meth)acrylic resin composition (A) containing a (meth)acrylic monomer (a) and a (meth)acrylic polymer (b), an inorganic filler (B), and a curing agent (C), wherein, the component (a) is a (meth)acrylate having a bicyclo ring, fluorine atom, cyclic ether, cyclohexane ring or tricyclo ring, and the component (C) is a radical polymerization initiator having a 10 hours half-life temperature of 75° C. or more; an acrylic SMC or BMC comprising this (meth)acrylic premix and a thickening agent; and a method for producing (meth)acrylic artificial marble, wherein this (meth)acrylic SMC or BMC is cured with being pressurized and heated at a temperature in the range from 105 to 150° C., are provided. These are useful for producing (meth)acrylic artificial marble having various excellent physical properties such as appearance, dimension stability, hot water resistance, weatherability.

Abstract: Prepolymers of Formula (I) are useful in hydrogel materials wherein M is a hydrophilic radical derived from at least one hydrophilic ethylenically unsaturated monomer and having a molecular weight of about 500 to 5000; each R is independently selected from an alkylene group having 1 to 10 carbon atoms wherein the carbon atoms may include ether, urethane or ureido linkages therebetween; each R′ is independently selected from hydrogen, monovalent hydrocarbon radicals or halogen substituted monovalent hydrocarbon radicals wherein the hydrocarbon radicals have 1 to 18 carbon atoms which may include ether linkages therebetween; a is an integer equal to or greater than 1; each U is independently a divalent urethane or ureido segment; x is greater than or equal to 1, y is greater than or equal to 1; and z is greater than or equal to 1; and each E is independently a polymerizable, ethylenically unsaturated radical.

Abstract: A masterbatch composition comprising: (a) a copolymer of ethylene and 1-octene prepared with a metallocene catalyst; (b) as a scorch inhibitor, a substituted hydroquinone; 4,4′-thiobis(2-methyl-6-t-butylphenol); 4,4′-thiobis(2-t-butyl-5-methylphenol); or mixtures thereof; (c) as a cure booster, triallyl trimellitate; 3,9-divinyl-2,4,8,10-tetra-oxaspiro[5.5]undecane; triallylcyanurate; triallyl isocyanurate; or mixtures thereof; and (d) an organic peroxide.

Abstract: Curable silylated copolymers based on olefin copolymers comprising at least one C4 to C7 isomonoolefin and a vinyl aromatic monomer (alkyl styrene) are prepared by reacting the olefin copolymer with an olefinically unsaturated hydrolyzable silane in the presence of a free radical generating agent. The silylated copolymers are readily curable by contact with water (moisture) and a silanol condensation catalyst and are particularly useful as the polymeric component in sealant, caulking, adhesive and coating formulations.

Abstract: A curable resin composition comprising (1) a polymerizable vinyl monomer, (2) a polymerization initiator, (3) an aromatic amine and/or a pyridine derivative, (4) a .beta.-diketone chelate and/or a .beta.-keto-ester, and (5) a phosphate.

Abstract: A polymer having groups located at the ends of the polymer chain which groups are derived from stable free radical compounds, wherein the polymer is of the formula:SFR-(R)-SFRwherein SFR represents a covalently bonded stable free radical group and R represents a thermoplastic resin.

Abstract: Bead polymers having an average particle size of 1 to 30 .mu.m and a narrow particle size distribution are obtained by the seed/feed process if a crosslinked polymer having a soluble fraction of less than 25 wt. % and an average particle size of 0.5 to 10 .mu.m is used as the seed.

Abstract: The present invention relates a toner for developing electrostatic images, comprising: a resin composition, which contains a binder resin and low molecular weight wax, and a coloring agent, wherein the binder resin does not substantially contain insoluble tetrahydrofuran (THF) component, its chromatograph measured with soluble tetrahydrofuran (THF) component has a main peak in a region of a molecular weight of 2,000 to 30,000 and a subpeak or a shoulder in a high molecular weight region of a molecular weight of 100,000 or more, a ratio of weight average molecular weight (Mw)/number average molecular weight (Mn) thereof is 30 or more, the high molecular weight region has a crosslinking monomer unit as a component monomer unit and the binder resin contains high molecular weight polymer having a Mw of 1,200,000 or more polymerized by using both polyfunctional initiator and a mono-functional initiator. Moreover, the present invention relates to a method of manufacturing a resin composition for producing a toner.

Abstract: A process for the preparation of branched thermoplastic resins comprising: heating a mixture of an unsaturated resin, a free radical initiator, and a stable free radical agent; adding to the heated mixture at least on polymerizable monomer; and cooling the mixture, wherein the resulting product is a branched thermoplastic resin with arms or branches comprised of polymerized monomer with substantially uniform length and narrow polydispersity.

Abstract: An optical resin, of which the refractive index continuously changes in a specific direction, is produced by filling a polymerization container with a mixed solution containing at least one type of polymerizable monomer or polymerizable monomer sol and at least one type of substance whose solubility parameter differs by 7 (cal/cm.sup.3).sup.1/2 or less and refractive index by 0.001 or more from those of a polymer produced by polymerization of the monomer, and by subjecting the mixture to polymerization reaction by applying heat or energy rays to the container from outside so that the polymerization reaction starts and progresses preferentially from a particular region of the mixture, thus forming a concentration gradient of the substance having different refractive index.The polymerization container may be made of a polymer which swells and dissolves into the mixed solution from an inner wall thereof.

Abstract: An optical resin, of which the refractive index continuously changes in a specific direction, is produced by filling a polymerization container with a mixed solution containing at least one type of polymerizable monomer or polymerizable monomer sol and at least one type of substance whose solubility parameter differs by 7 (cal/cm.sup.3).sup.1/2 or less and refractive index by 0.001 or more from those of a polymer produced by polymerization of the monomer, and by subjecting the mixture to polymerization reaction by applying heat or energy rays to the container from outside so that the polymerization reaction starts and progresses preferentially from a particular region of the mixture, thus forming a concentration gradient of the substance having different refractive index.The polymerization container may be made of a polymer which swells and dissolves into the mixed solution from an inner wall thereof.

Abstract: This invention relates to a vulcanizable rubber composition obtained by compounding, into an ethylenically unsaturated nitrile-conjugated diene copolymer rubber, a zinc compound, an .alpha., .beta.-ethylenically unsaturated carboxylic acid, a compound of a 2A Group metal of the periodic table and an organic peroxide. The vulcanizable rubber composition of this invention can provide a vulcanized rubber having excellent heat resistance and oil resistance and moreover possessing high tensile stress or stably exhibiting high tensile strength without being affected by kneading conditions, and is hence suitable for use as a rubber material for toothed belts and the like.

Abstract: When producing a graft modified polyolefin by melting and kneading a polyolefin, a radical-polymerizable monomer and a radical-polymerization initiator, the producing efficiency is improved. The grafting reaction is effected by feeding the melted polyolefin containing either one of said radical-polymerizable monomer and the radical-polymerization initiator to the other. When said radical-polymerizable monomer is an unsaturated carboxylic anhydride, said unsaturated carboxylic anhydride as a starting material is preliminarily heated at 50.degree. to 250.degree. C., and then fed to the grafting reaction mentioned above. When the monomer is an unsaturated carboxylic acid or an acid anhydride of such an unsaturated carboxylic acid, an organic peroxide of a formula (I) is used as the radical-polymerization initiator. ##STR1## In this formula (I), two substituting groups connected directly to the benzene ring have an ortho-positional relationship or a meta-positional relationship, R.sub.1, R.sub.2, R.sub.3, R.sub.

Abstract: Elastic-thermoplastic graft polymers manufactured by radical emulsion polymerization of resin-forming vinyl monomers in the presence of rubber present in latex form with the use of a combination of a peroxide of formula (I) ##STR1## where R.sup.1 signifies alkyl, cycloalkyl and aryl groups with 4 to 20 carbon atoms,X the groups --COOH and --SO.sub.3 H as well as their alkali, alkaline-earth or ammonium salts,n an integer in the range from 1 to 6,A alkylene, cycloalkylene and arylene groups with 6 to 40 carbon atomsand a reducing agent as initiator system, a method for their manufacture and their use as moulding compositions.

Abstract: Elastic-thermoplastic graft polymers manufactured by radical emulsion polymerisation of resin-forming vinyl monomers in the presence of rubber present in latex form with the use of a combination of a peroxide of formula (I) ##STR1## where R.sup.1 signifies alkyl, cycloalkyl and aryl groups with 4 to 20 carbon atoms,X the groups --COOH and --SO.sub.3 H as well as their alkali, alkaline-earth or ammonium salts,n an integer in the range from 1 to 6,A alkylene, cycloalkylene and arylene groups with 6 to 40 carbon atomsand a reducing agent as initiator system, a method for their manufacture and their use as moulding compositions.

Abstract: (I) The (co)polymerisation of ethylene is carried out in at least one reaction zone (R) under high pressure, at 150.degree.-320.degree. C.; (II) the reaction product is routed into a zone (S), under an intermediate pressure P, for separation of the (co)polymer, in the molten state, from the unreacted (co)monomer(s), or the reaction product is routed into a first separation zone (S1), under an intermediate pressure (P1); the (co)polymer issuing from (S1) is then routed into a second separation zone (S2), under a pressure P2<P1; (III) the (co)polymer is routed into a zone (SF), under low pressure, for final separation of the (co)polymer from the residual gases. Let-down zones (D), (D1) and (D2) are provided along the path of the (co)polymer between the zones (S) and (SF), (S1) and (S2), and (S2) and (SF) respectively, the grafting monomer or monomers being introduced on-line, in the path of the (co)polymer, at at least one point located at the level of the zone (D) or at at least one zone (D1, D2).