Abstract: The present invention relates to a compound represented by Formula 1, a method for preparing the same, and a modified conjugated diene-based polymer having a high modification ratio and including a functional group derived from the compound.

Abstract: The present invention relates to a modification initiator and a modified conjugated diene-based polymer including the same, and more particularly, the present invention provides a modification initiator including a compound represented by Formula 1, a modified conjugated diene-based polymer including the same, and a method of preparing a modified conjugated diene-based polymer.

Abstract: The polymer according to the present invention is a polymer containing a conjugated diene monomer unit and a vinyl aromatic monomer unit, wherein the polymer has a polymer block (A) containing the vinyl aromatic monomer unit as a main component and a polymer block (B) containing the conjugated diene monomer unit and the vinyl aromatic monomer unit, a content of the polymer block (A) is 10% by mass or more and 40% by mass or less, a bulk density of the polymer is 0.05 g/mL or more and 0.45 g/mL or less, and a specific surface area of the polymer is 0.10 m2/g or more and 0.60 m2/g or less.

Abstract: The present invention addresses the problem of providing a cross-copolymer having excellent flexibility, heat resistance, cold resistance and mechanical properties. The present invention also addresses the problem of providing a resin composition which is prepared using the cross-copolymer, has excellent compatibility with polyolefin resins and aromatic resins, and has excellent flexibility, heat resistance and cold resistance.

Abstract: A method for producing a functionalized rubber that includes adding a diene rubber selected from natural rubber, a synthetic polyisoprene rubber or combinations thereof and an organic peroxide to a mixer, the organo peroxide may be represented by the formula R1—O—O—R2, wherein R1 is selected from hydrogen or an organic moiety of between 4 and 15 carbon atoms and R2 comprises a functional moiety. The mix composition may be mixed until the mix composition reaches a target temperature of between 120° C. and 190° C. and decomposing the organic peroxide to provide a decomposition product comprising the functional moiety and reacting at least a portion of the decomposition product with at least a portion of the diene rubber to produce the functionalized rubber.

Abstract: The present invention relates to curable compositions which are capable of safely and sufficiently bonding components of electrical devices. In particular, the invention relates to two-part, halogen-free curable compositions which are capable of rapidly curing at room temperatures as well as at elevated temperatures.

Abstract: Oligomer-grafted nanofiller compositions and composites including oligomer-grafted nanofillers are disclosed. An oligomer-grafted nanofiller composition for disposition in a polymer matrix, the polymeric matrix comprising polymers derived from a plurality of polymerizable units, can include a nanoparticle, one or more coupling groups bonded to the nanoparticle; and one or more oligomers bonded to the one or more coupling groups. In an embodiment the oligomer is derived from two or more polymerizable units, at least one polymerizable unit being at least substantially similar to at least one of the polymerizable units of the polymer matrix. In another embodiment the oligomer comprises two or more polymerizable units and improves dispersion, interfacial strength, or both dispersion and interfacial strength between the nanoparticle and the polymer matrix. Composites and methods are also disclosed.

Abstract: A mixture which contains a) a copolymer or block copolymer A comprising one or more copolymer blocks (B/S)A which are respectively composed of from 65 to 95% by weight of vinylaromatic monomers and of from 35 to 5% by weight of dienes, and whose glass transition temperature TgA is in the range from 40° to 90° C., b) a block copolymer B comprising at least one hard block S which is composed of vinylaromatic monomers, and comprising one or more copolymer blocks (B/S)B which are respectively composed of from 20 to 60% by weight of vinylaromatic monomers and of from 80 to 40% by weight of dienes, and whose glass transition temperature TgB is in the range from ?70° to 0° C., c) a polystyrene C, and its use for the production of packaging for electronics components.

Abstract: The present invention relates to a polymer composition, comprising (i) a polypropylene homopolymer, (ii) a polypropylene random copolymer, prepared by copolymerization of propylene with an olefin comonomer and having an amount of olefin comonomer units of 0.2 to 5 wt %, and (iii) an elastomeric copolymer of propylene and at least one olefin comonomer, the polymer composition having a tensile modulus, determined according to ISO 527-2/1 B at 1 mm/min. and 230 C, of at least 1200 MPa.

Abstract: A block copolymer or graft copolymer with weight-average molar mass Mw of at least 100 000 g/mol, comprising a) at least one block S composed of from 95 to 100% by weight of vinylaromatic monomers and from 0 to 5% by weight of dienes, and b) at least one copolymer block (S/B)A composed of from 63 to 80% by weight of vinylaromatic monomers and from 20 to 37% by weight of dienes, with glass transition temperature TgA in the range from 5 to 30° C., where the proportion by weight of the entirety of all of the blocks S is in the range from 50 to 70% by weight, based on the block copolymer or graft copolymer, and also mixtures thereof, and their use.

Abstract: An object of the present invention is to provide a conjugated diene-based polymer capable of providing a polymer composition which is excellent in a reduction in fuel consumption when silica is incorporated as a filler, a process for producing the conjugated diene-based polymer, and a polymer composition comprising said conjugated diene-based polymers and silica.

Abstract: Butadiene is anionically polymerized (or block copolimerized with styrene) in a low-boiling non-polar solvent in presence of rganolithiura compounds. At the end of the polymerization, the non-polar solvent is switched with styrene and the new solution is stored in tanks in relation to the type of polybutadiene (or its block copolymer with styrene) obtained. The polybutadiene solution (and/or its block copolymer with styrene) with the desired set of properties is then fed to a production plant of high impact vinyl aromatic (co)polymers.

Abstract: A pre-cursor block copolymer for sulfonation which, prior to hydrogenation, has the general configuration A-B-A, A-B-A-B-A, (A-B-A)nX, (A-B)nX, A-D-B-D-A, A-B-D-B-A, (A-D-B)nX, (A-B-D)nX or mixtures thereof, wherein A, B and D blocks do not contain any significant levels of olefinic unsaturation. Each A and D block is a polymer block resistant to sulfonation, and each B block is a polymer block susceptible to sulfonation. Each A block is a segment of one or more polymerized para-substituted styrene monomers, each B block contains segments of one or more vinyl aromatic monomers selected from polymerized (i) unsubstituted styrene monomers, (ii) ortho-substituted styrene monomers, (iii) meta-substituted styrene monomers, (iv) alpha-methylstyrene, (v) 1,1-diphenylethylene, (vi) 1,2-diphenylethylene and (vii) mixtures thereof, and each D block contains polymers having a glass transition temperature less than 20° C. and a number average molecular weight of between 1,000 and 50,000.

Abstract: A modified natural rubber particle having carbon-carbon double bonds assigned to multifunctional vinyl monomers graft-copolymerized onto the surface of the modified natural rubber particle, which is prepared by graft-copolymerization of multifunctional vinyl monomers having two or more carbon-carbon double bonds onto natural rubber particles or deproteinized natural rubber particles. One of the methods for producing a modified natural rubber particle includes the steps of: forming inclusion complex of the multifunctional vinyl monomers having two or more carbon-carbon double bonds with a guest-protecting agent to protect at least one of the double bonds of the multifunctional vinyl monomers; graft-copolymerizing the resulting inclusion complex onto natural rubber particles or deproteinized natural rubber particles; and deprotecting the protected double bonds by removing the guest-protecting agent from the obtained graft-copolymer.

Abstract: A sulfonated block copolymer which is solid and non-dispersible in water having at least two polymer end blocks A and at least one interior block B wherein each A block is a polymer block resistant to sulfonation and each B block is a polymer block susceptible to sulfonation, wherein the A and B blocks do not contain any significant levels of olefinic unsaturation. Each A block includes one or more segments selected from polymerized (i) ethylene, (ii) monomers of conjugated dienes having a vinyl content less than 35 mol percent prior to hydrogenation, and (iii) mixtures thereof; and each B block comprising segments of one or more polymerized vinyl aromatic monomers selected from (i) unsubstituted styrene monomers, (ii) ortho-substituted styrene monomers, (iii) meta-substituted styrene monomers, (iv) alpha-methylstyrene, (v) 1,1-diphenylethylene, (vi) 1,2-diphenylethylene and (vii) mixtures thereof.

Abstract: A polypropylene resin and a polypropylene resin composition are provided, which have excellent fluidity and foaming properties, and particularly in use for foam injection molding, allow molding with a narrow initial cavity clearance even if a large mold is used, and therefore can provide a thin, large-area foam-injection-molded article having good appearance. The invention relates to a polypropylene resin obtained by melt mixing a linear polypropylene resin, a radical polymerization initiator and a conjugated diene compound, wherein the polypropylene resin has a melt flow rate of more than 30 g/10 min and not more than 250 g/10 min as measured at 230° C. under a load of 2.16 kg; a melt tension at 200° C. of not less than 0.3 cN; and a loss tangent (tan ?) of not more than 6.0, the loss tangent being a ratio of loss modulus to storage modulus at an angular frequency of 1 rad/s in dynamic viscoelasticity measurement at 200° C.

Abstract: The present invention provides a polar group-containing copolymer which can provide a rubber composition and a winter tire achieving the abrasion resistance, performance on ice, and handling stability on dry roads in a balanced manner. The present invention relates to a polar group-containing copolymer obtainable by copolymerizing a conjugated diene compound and a polar group-containing vinyl compound, wherein the polar group-containing vinyl compound is a compound that has a polymerizable unsaturated bond and a polar group, wherein any one of carbon atoms forming the polymerizable unsaturated bond and a carbon atom linked to the polar group are connected to each other via at least one carbon atom, and wherein a cis content of the double bond portion of the conjugated diene compound in the polar group-containing copolymer is 80 mol % or more.

Abstract: A method for fractionating a target fraction from a sample is disclosed herein. The method includes providing a polymer brush having a substrate and a polymer chain attached to and extending outwardly from the substrate. The method further comprising contacting the polymer brush with the sample to allow for sorption of the target fraction by the polymer chain. The polymer chain is then stimulated with a stimulus to contract and release the target fraction.

Abstract: Provided is a thermoplastic resin composition having excellent flame resistance, colorability, and scratch resistance, including: A) 100 parts by weight of a basic resin comprising 10 to 89 wt % of acrylonitrile-butadiene-styrene copolymer, 89 to 10 wt % of styrene-acrylonitrile copolymer, and 1 to 40 wt % of methylmethacrylate polymer; B) 1 to 30 parts by weight of bromoalkyl or bromophenyl cyanurate compounds; and C) 1 to 20 parts by weight of antimony compound, thereby, making it possible to provide the thermoplastic resin composition having excellent flame resistance, impact strength, scratch resistance, colorability, and surface hardness as synergy effects.

Abstract: A method for varying the transport properties of a film cast from a polymer having at least two polymer end blocks A and at least one polymer interior block B wherein each A block is a polymer block resistant to sulfonation and each B block is a polymer block susceptible to sulfonation, and wherein said A and B blocks do not contain any significant levels of olefinic unsaturation. The method includes casting the polymer using a solvent mixture having two or more solvents selected from the group consisting of polar solvents and non-polar solvents.

Abstract: A process for forming a nanoparticle composition is provided. The process includes polymerizing conjugated diene monomer in a hydrocarbon solvent to form a first reaction mixture, and charging excess alkenylbenzense monomer and anionic catalyst to form mono-block and diblock polymers. Micelles of said mono-block and diblock polymers are formed, and at least one crosslinking agent is added to cross-link the micelles and form nanoparticles. The nanoparticles preferably have a poly(alkenylbenzene) core and an outer layer including monomer units selected from the group consisting of conjugated dienes, alkenylbenzenes, alkylenes, and mixtures thereof, and a size distribution of between about 1 and 1000 nm.

Abstract: A sulfonated block copolymer which is solid and non-dispersible in water having at least two polymer end blocks A and at least one polymer interior block B wherein each A block is a polymer containing essentially no sulfonic acid or sulfonate functional groups and each B block is a polymer block containing 10 to 100 mol percent sulfonic acid or sulfonate functional groups based on the number of monomer units of the B block, and wherein said A and B blocks do not contain any significant levels of olefinic unsaturation. Also claimed are processes for making such block copolymers, and the various end uses and applications for such block copolymers.

Abstract: A process for preparing sulfonated block copolymers that are solid in water having at least two polymer end blocks A and at least one polymer interior block B involving sulfonating the interior block B until substantially sulfonated. Each A block having one or more segments selected from polymerized (i) para-substituted styrene monomers, (ii) ethylene, (iii) alpha olefins of 3 to 18 carbon atoms; (iv) hydrogenated 1,3-cyclodiene monomers, (v) hydrogenated monomers of conjugated dienes having a vinyl content less than 35 mol percent prior to hydrogenation, (vi) acrylic esters, (vii) methacrylic esters, and (viii) mixtures thereof. Each B block having segments of one or more polymerized vinyl aromatic monomers selected from (i) unsubstituted styrene monomers, (ii) ortho-substituted styrene monomers, (iii) meta-substituted styrene monomers, (iv) alpha-methylstyrene, (v) 1,1-diphenylethylene, (vi) 1,2-diphenylethylene and (vii) mixtures thereof.

Abstract: A photocurable liquid resin which comprises (A) a step of producing a conjugated diene-based polymer or a conjugated diene/aromatic vinyl-based copolymer, which has a weight-average molecular weight of 5,000 to 40,000 and a molecular weight distribution of 3.

Abstract: A sulfonated block copolymer which is solid and non-dispersible in water having at least two polymer end blocks A and at least one interior block B wherein each A block is a polymer block resistant to sulfonation and each B block is a polymer block susceptible to sulfonation, wherein the A and B blocks do not contain any significant levels of olefinic unsaturation. Each A block having one or more segments selected from (i) acrylic esters, (ii) methacrylic esters, and (viii) mixtures thereof; and each B block comprising segments of one or more polymerized vinyl aromatic monomers selected from (i) unsubstituted styrene monomers, (ii) ortho-substituted styrene monomers, (iii) meta-substituted styrene monomers, (iv) alpha-methylstyrene, (v) 1,1-diphenylethylene, (vi) 1,2-diphenylethylene and (vii) mixtures thereof.

Abstract: A composition having a sulfonated block copolymer which is solid and non-dispersible in water having at least two polymer end blocks A, at least one polymer interior block B, and at least one polymer block D. Each A block is a segment of one or more polymerized para-substituted styrene monomers, each B block contains segments of one or more vinyl aromatic monomers selected from polymerized (i) unsubstituted styrene monomers, (ii) ortho-substituted styrene monomers, (iii) meta-substituted styrene monomers, (iv) alpha-methylstyrene, (v) 1,1-diphenylethylene, (vi) 1,2-diphenylethylene and (vii) mixtures thereof, and each D block having a glass transition temperature of less than 20° C. and a number average molecular weight of between 1,000 and 50,000 Adhesives, coatings and membranes are formed from the composition. Various articles are formed with the composition including films, fibers, fabrics, laminates, and absorbent cores.

Abstract: The present invention provides a block copolymer or a hydrogenated product thereof excellent in low-temperature shrinkability, natural shrinkability, rigidity and the like, excellent in a balance of physical properties such as blocking resistance, resistance to fusion bonding in hot water, impact resistance and the like, and having a few fish eyes (FE's) caused by gels. Further, the invention provides a heat shrinkable film and a heat shrinkable multilayer film suitable for drink container packaging, cap seals and the like, using such a block copolymer or the hydrogenated product thereof.

Abstract: The present invention provides polymeric nanoparticles comprising triblock and optionally diblock copolymer chains. The architecture of the polymeric nanoparticles may be controlled, resulting in nanoparticles having non-spherical shapes. The present invention also provides a method of preparing the polymeric nanoparticles and a rubber article such as a tire manufactured from a formulation comprising the polymer nanoparticles.

Abstract: The present invention is a, solid block copolymer comprising at least two polymer end blocks A and at least one polymer interior block B wherein each A block is a polymer block resistant to sulfonation and each B block is a polymer block susceptible to sulfonation, and wherein said A and B blocks do not contain any significant levels of olefinic unsaturation.

Abstract: Disclosed is a thermoplastic resin composition having excellent impact resistance at a low temperature, while maintaining high transparency; this thermoplastic resin composition is obtained by compounding an impact resistance improver into a thermoplastic resin, the impact resistance improver being composed of a graft copolymer which is obtained by polymerizing a vinyl monomer component in the presence of a polymer mixture containing a polymer having butadiene units as an essential component and a polymer having styrene units as an essential component, the polymer mixture containing 45 to 65% by mass of the butadiene units and 35 to 55% by mass of the styrene units.

Abstract: A blend comprising a) from 5 to 40% by weight of a linear block copolymer of vinylaromatic monomers and dienes of the structure (I) S1—(B/S)1—S2 having a flexible phase fraction (B/S)1 of not more than 55% by weight, based on the block copolymer (I) and b) from 95 to 60% by weight of a linear block copolymer of vinylaromatic monomers and dienes of the structure (II) S3—(B/S)2—S4 having a flexible phase fraction (B/S)2 of at least 65% by weight, based on the block copolymer (II), where S1 is a block of vinylaromatic monomers having a number average molar mass Mn in the range from 40 000 to 100 000 g/mol, S2, S3 and S4 are in each case blocks of vinylaromatic monomers having a number average molar mass Mn in the range from 5000 to 20 000 g/mol, (B/S)1 and (B/S)2 are in each case copolymer blocks of dienes and vinylaromatic monomers having a number average molar mass Mn in the range from 15 000 to 40 000 g/mol.

Abstract: A process for the preparation of a functionalized, coupled or starred block copolymer which is usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, one at least of said blocks consisting of a polyisoprene and at least one other block consisting of a diene elastomer other than a polyisoprene the molar ratio of units originating from one or more conjugated dienes of which is greater than 15%.

Abstract: Electrical insulation compounds are disclosed, the insulation compounds including an ethylene polymer comprising at least 40 wt % ethylene-derived units and having a density of ?0.91 g/cm3 and a propylene polymer comprising at least 75 wt % propylene-derived units and having an isotactic propylene triad tacticity of from 65% to 99%. Also disclosed are electrical devices including the electrical insulation compounds.

Abstract: An elastomeric composition for forming a golf ball or a component thereof is disclosed that includes the use of a non-conjugated diene monomer having two or more vinyl (CH2?CH—) terminal end groups. The composition produces a molded product exhibiting an enhanced combination of increased compression (i.e., softness) and resilience (C.O.R.).

Abstract: A hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the hydrogenated copolymer containing at least one hydrogenated copolymer block (B) which is obtained by hydrogenating an unhydrogenated random copolymer block comprised of conjugated diene monomer units and vinyl aromatic monomer units, wherein the hydrogenated copolymer has the following characteristics: the hydrogenated copolymer has a content of the vinyl aromatic monomer units of from more than 40% by weight to less than 95% by weight; at least one peak of loss tangent (tan ?) is observed at ?10 to 80° C. in a dynamic viscoelastic spectrum obtained with respect to the hydrogenated copolymer; and substantially no crystallization peak ascribed to the copolymer block (B) is observed at ?20 to 80° C. in a differential scanning calorimetry (DSC) chart obtained with respect to the hydrogenated copolymer.

Abstract: This invention provides a production method of a vinyl polymer having a functional group at a molecular chain terminus which comprises adding a compound (I) having a functional group and an internal alkenyl group or conjugated polyene compound (II) in the living radical polymerization of a radical-polymerizable vinyl monomer. The present invention relates to a vinyl polymer having a functional group at a molecular terminus, a production method of the same and a curable composition containing said polymer.

Abstract: An elastomeric composition for forming a golf ball or a component thereof is disclosed that includes the use of a non-conjugated diene monomer having two or more vinyl (CH2?CH—) terminal end groups. The composition produces a molded product exhibiting an enhanced combination of increased compression (i.e., softness) and resilience (C.O.R.).

Abstract: A rubber composition which prevents the rise in rubber hardness over time and can maintain good performance on snow and ice over a long period, which includes (A) a diene rubber containing, as a main component, at least one member selected from the group consisting of natural rubber and butadiene rubber, and (B) 5 to 60 parts by weight of vegetable oil which has an iodine value of at least 80 and contains at least 70% by weight of unsaturated fatty acid having at least 18 carbon atoms, based on 100 parts by weight of the diene rubber (A), the rubber composition having a tan ? peak temperature Tg of at most ?50° C. and a rubber hardness of at most 64 at 0° C. The present invention also relates to a pneumatic tire using the rubber composition as the tread.

Abstract: The present invention provides an olefin block copolymer for a viscosity index improver capable of preparing a lubricating oil composition having excellent low temperature properties and excellent balance between viscosity and shear stability, a viscosity index improver and a lubricating oil composition comprising the viscosity index improver. The olefin block copolymer has a Mw/Mn of not more than 1.5, and comprises: (i) a polymer block comprising ethylene and an ?-olefin of 3 to 20 carbon atoms, having a molar ratio (ethylene/?-olefin) of ethylene units to ?-olefin units of from 20/80 to 65/35, a Mw of 50,000 to 2,000,000, and having a slope of an intramolecular composition distribution of absolute value of 0.

Abstract: Thermoplastic molding composition characterized in that the polymer proportion soluble in dichloromethane has a c50 value of acrylonitrile of ≧28 wt. % and a chemical distribution (c90−c10 value) of the acrylonitrile of ≧5 wt. % is disclosed. The composition is characterized by its improved processability by extrusion and thermoforming.

Abstract: A modified natural rubber is disclosed, which is obtained by modifying a deproteinized natural rubber having a nitrogen content of less than 0.10% by weight. A process for improving the graft ratio and the graft efficiency of natural rubber and a process for improving the epoxidation ratio of natural rubber are also disclosed. The modified natural rubber of the present invention has a high modifying efficiency and thus shows an excellent modifying effect. It is also useful as a means for preventing allergy.

Abstract: The present invention relates to multiblock interpolymers having the following symmetric structures and processes for their preparation: Y-X-Y, wherein Y represents a block of a random copolymer of conjugated diene and monovinyl aromatic monomer; and X represents a block of butadiene homopolymer, a block of isoprene homopolymer, or a block of butadiene/isoprene copolymer, and processes for the preparation thereof. The present multiblock interpolymers have in the same molecule both a rubber block of random copolymer of conjugated diene and monovinyl aromatic monomer and a rubber block selected from blocks of butadiene homopolymer, isoprene homopolymer and butadiene/isoprene copolymers, and hence possess excellent properties of the both two kinds of rubbers, and can be used widely as integrated rubber materials with excellent property balance, the present processes can simply prepare the above integrated rubber material in situ in a single reactor.

Abstract: The present invention relates to block copolymers intended to constitute an elastomeric matrix of a cross-linkable rubber composition with reduced hysteresis, to such a rubber composition which is usable in the cross-linked state in a tire tread, to such a tire tread and to a tire comprising said tire tread which exhibits reduced rolling resistance.

Abstract: The present invention relates to selectively hydrogenated block copolymers where one of the blocks is a random copolymer of a mono-alkenyl arene monomer, such as styrene, and a 1,3-cyclodiene monomer, such as 1,3-cyclohexadiene, and one of the other blocks is a hydrogenated polymer or copolymer of an acyclic conjugated diene, such as 1,3-butadiene or isoprene.

Abstract: A grafted polyolefin containing one or more of N-vinylimidazole, 4-vinylpyridine, or other ethylenically-unsaturated nitrogen-containing or oxygen-containing graftable monomers grafted to a polyolefin copolymer is disclosed. The grafted polyolefin preferably has a weight average molecular weight of from about 20,000 to about 500,000, a polydispersity of less than about 10, and an ADT value of at least about 8. The grafted polyolefin can be defined as containing more than about 1.2% by weight of grafted monomer on a polyolefin, or as containing at least about 13 moles of graftable monomers per mole of polyolefin, or as having an asphaltene dispersancy test (ADT) value of at least about 8. Also described is a lubricating oil comprising a lubricant base oil and a grafted polyolefin as described above. Also described is a method of making a dispersant viscosity index improver.

Abstract: Lithium-terminated polymers of one or more conjugated dienes and of one or more mono alkenyl arenes are coupled by reaction with an alkoxy silane coupling agent having the formula Rx—Si—(OR′)y, where x is 0 or 1, x+y=4, R and R′ are the same or different, R is selected from aryl hydrocarbon radicals, linear alkyl hydrocarbon radicals and branched alkyl hydrocarbon radicals, and R′ is selected from linear and branched alkyl hydrocarbon radicals, such that the resulting polymer composition contains less than about ten weight percent of uncoupled polymer diblock. The polymer compositions are subsequently selectively hydrogenated, and are useful in a variety of compounds and end use applications.

Abstract: The present invention discloses a composition of matter consisting of a high impact polystyrene exhibiting improved environmental stress crack resistance. The HIPS material is formed utilizing polybutadiene, polyisoprene, and copolymers thereof with styrene, having a Mooney viscosity exceeding about 35 and a gel content of up to about 28%. The present invention discloses the use of a combination of lubricant additives to obtain a HIPS material with higher ESCR values than either additive alone could provide, and also discloses the optimum level of each additive.

Abstract: Articles are formed from a thermosetting composition based on polybutadiene or polyisoprene resins which are subjected to a high temperature cure step of greater than 250° C. The thermosetting compositions may include fillers such as particulate ceramic fillers and may also include woven webs for improved dimensional stability and decreased brittleness. The formation process of this invention is particularly well suited for making electrical circuit substrates for microwave and digital circuits, typically in the form of the thermosetting composition being laminated on one or both opposed surfaces to metal conductive foil (e.g., copper).

Abstract: The present invention discloses a composition of matter consisting of a high impact polystyrene exhibiting improved environmental stress crack resistance. The HIPS material is formed utilizing polybutadiene, polyisoprene, and copolymers thereof with styrene, having a Mooney viscosity exceeding about 35 and a gel content of up to about 28%. The present invention discloses the use of a combination of lubricant additives to obtain a HIPS material with higher ESCR values than either additive alone could provide, and also discloses the optimum level of each additive.

Abstract: A continuous process for oligomers which do not contain, as polymerized units, carboxylic acid-containing monomers and their salts, including the steps of: (1) forming a reaction mixture, substantially free of carboxylic acid-containing monomers and their salts, containing: (i) 0.5 to 99.95% by weight of the reaction mixture of at least one ethylenically unsaturated monomer; and (ii) 0.05 to 25% by weight, based on the weight of the ethylenically unsaturated monomer, of at least one free-radical initiator; and (2) continuously passing the reaction mixture through a heated zone wherein the reaction mixture is maintained at a temperature of at least 150° C. and a pressure of at least 30 bars for from 0.1 seconds to 4 minutes to form terminally-unsaturated oligomers. In addition, processes for forming oligomers of vinyl acetate and oligomers of vinyl alcohol are disclosed. Mixtures of fully saturated and terminally unsaturated oligomers are also disclosed.