Abstract: A substantially linear poly-vinylarene/polyurethane block copolymer prepared by reacting (1) a difunctional poly-vinylarene which is produced by anionic polymerization and which contains isocyanate-reactive groups, (2) a diisocyanate or an isocyanate prepolymer, and (3) a diol having a high molecular weight or a chain extender having a lower molecular weight, is disclosed to be suitable for the preparation of shaped articles, coatings, coupling agents and compatibilizers.

Abstract: Hydroxy-terminated telechelic rubber polymers and block copolymers of flexible polymers with unsaturated polyester resins improve the elongation and flexural elongation of in-mold coating compositions for fiber reinforced plastics (FRP). An FRP in-mold coating composition based upon vinyl ester resin, ethylenically unsaturated monomers, and at least one of telechelic hydroxy terminated flexible polymers and the block copolymers of functionally terminated flexible polymers with unsaturated polyester polymers are described.

Abstract: The invention relates to vinyl sulfonated and non-sulfonated hydroxy functional polyurethane copolymers prepared from macromonomer diols and their use in magnetic recording media. The sulfonated hydroxy functional copolymer comprises: a polyurethane backbone; at least one SO.sub.3 M group pendant from the polyurethane backbone, wherein the polyurethane backbone has an S0.sub.3 M equivalent weight of from about 2,000 to about 100,000, and wherein M is selected from the group consisting of H.sup.+, NR.sub.4.sup.+ wherein R can be H.sup.+ or an alkyl group, Li.sup.+, Na.sup.+, K.sup.+, and mixtures thereof; at least two crosslinkable hydroxy groups pendant from the polyurethane backbone, wherein the polyurethane backbone has a hydroxy equivalent weight of from about 500 to about 50,000; and at least one vinyl polymeric segment B pendant from the polyurethane backbone.

Abstract: A curable polyester molding composition incorporating an elastomeric low profile additive dispersed in voided rubbery particle form throughout the composition is used in association with a compatibilizing agent to form a molded thermoset article having very smooth, light reflective, class A surfaces and having a matrix fracture energy which is comparable to articles formed from similar or identical molding compositions which are free of low profile additives. The low profile additive is an epoxidized elastomer or block copolymer having at least one flexible elastomer block and one monovinyl aromatic block. The compatibilizing agent is a copolymer having a diene polymer backbone which is compatible with the elastomer or the flexible diene block of the low profile additive, with constituents which are compatible or reactive with the polyester being grafted or adducted onto the diene polymer backbone.

Abstract: Resin compositions of improved dispersibility and mechanical properties are obtained by polymerizing a polymerizable compound (A), insitu in a melted thermoplastic resin (B), in the presence of a dispersant (C) reactive or compatible with at least one of the resin (B) and polymerizate of (A).Suitable dispersants include those represented by the general formula (1) or (2)R.sub.1 --L(X--M--X--L).sub.n X--M--R.sub.2 (1)R.sub.1 --L(X--M--X--L).sub.n --R.sub.2 (2)wherein R.sub.1 and R.sub.2 are groups, such as hydrocarbyl acyl, alkoxy, hydroxyl, mercapto, amino, epoxy, isocyanate, carboxylic, carboxylic anhydride, carboxylic halide and aldehyde groups; L and M are residues of a polymer having a number average molecular weight of about 500-about 3,000,000, the difference in solubility parameter between the residue L or M and the resin (B) or polymerizate of (A) being not more than 0.

Abstract: Polycarbonates (PC) can be blended over all compositions with block copolymers containing stereoregular polymethyl methacrylate (s-PMMA) in which at least 60% of the monomer units are in the syndiotactic configuration to form modified but transparent polycarbonates for a number of applications. Additional homopolymers corresponding to the blocks of the copolymer may also be added to even further modify the properties of the polycarbonate while still retaining transparency.

Abstract: An epoxy resin modified material is disclosed, which is obtained by reacting an epoxy resin and a phenolic hydroxyl group-containing aramid/polybutadiene-acrylonitrile block copolymer represented by formula (I): ##STR1## wherein Ar.sup.1 and Ar.sup.3 each represent a divalent aromatic group; Ar.sup.2 represents a phenolic hydroxyl group-containing divalent aromatic group; x represents an integer of from 3 to 7; y represents an integer of from 1 to 4; y/(x+y) is from 0.1 to 0.3; z represents an integer of from 5 to 15; m represents an integer of from 1 to 400; n represents an integer of from 1 to n/(m+n) is from 0.01 to 0.50; and l represents an integer of from 1 to 50. An epoxy resin composition containing the epoxy resin modified material and a carboxyl-terminated polybutadiene-acrylonitrile copolymer is useful as a cationic electrodeposition coating.

Abstract: An epoxy resin modified material is disclosed, which is obtained by reacting an epoxy resin and a phenolic hydroxyl group-containing aramid/polybutadiene-acrylonitrile block copolymer represented by formula (I): ##STR1## wherein Ar.sup.1 and Ar.sup.3 each represent a divalent aromatic group; Ar.sup.2 represents a phenolic hydroxyl group-containing divalent aromatic group; x represents an integer of from 3 to 7; y represents an integer of from 1 to 4; y/(x+y) is from 0.1 to 0.3; z represents an integer of from 5 to 15; m represents an integer of from 1 to 400; n represents an integer of from 1 to 400; n/(m+n) is from 0.01 to 0.50; and l represents an integer of from 1 to 50. An epoxy resin composition containing the epoxy resin modified material is useful as a cationic electrodeposition coating.

Abstract: The cuttability of elastomeric pressure-sensitive adhesives, particularly of hot-melt tackified mutually immiscible elastomers, is improved by the addition of surfactants containing polyethylene-oxide and polypropylene-oxide blocks.

Abstract: A process is disclosed for preparing of aromatic polyester-polystyrene block copolymers which comprises subjecting preferentially styrene polymers (A) having terminal functional groups reactive with acid chloride groups and an excess of aromatic dicarboxylic acid dihalides (C) to condensation and then subjecting continuously the resultant mixture and aromatic dihydroxy compounds (B) to interfacial polymerization at the ratio (A)/[(B)+(C)] by weight of 5/95 to 80/20, without separating reaction products of styrene polymers (A) and aromatic dicarboxylic acid dihalides (C), and the block copolymers thus prepared contain a small amount of uncopolymerized styrene polymers, have long aromatic polyester segments, show low birefringence, good transparency, exceptionally low birefringence, low melt viscosity, and good mechanical strength, and are particularly useful as materials for optical instruments.

Abstract: A polyacetal resin composition having a volume resistivity lower than 10.sup.14 [.OMEGA..multidot.cm], which comprises (A) 100 parts by weight of a polyacetal resin and (B) 1 to 100 parts by weight of a polyether ester block copolymer which is derived from (a) a dicarboxylic acid component composed mainly of terephthalic acid, (b) a glycol component composed mainly of 1,4-butanediol and (c) a poly(ethylene oxide)glycol having a number average molecular weight of 500 to 20,000 and has a poly(ethylene oxide) dicarboxylate unit content of 20 to 95% by weight, has excellent antistatic characteristics and mechanical characteristics, and especially a high impact resistance.

Abstract: It is herein disclosed a blend comprising modified block copolymers and aromatic polycarbonates. These blends have and exhibit improved mechanical properties, particularly improved low temperature Notched Izod impact strength relative to unmodified block copolymers, such as KRATON.RTM. G.

Abstract: Polycarbonates (PC) can be blended over all compositions with block copolymers containing polyaromatic(alkyl)methacrylates (PAAM) to form modified but transparent polycarbonates for a number of applications. Furthermore, additional homopolymers corresponding to those in the block copolymer may also be added to further modify the properties of the polycarbonate while still retaining transparency. Polycarbonate plus PAAM block copolymers containing from 1 to 99% by weight PC behave as transparent materials with the PC and the PAAM block forming a continuous, single phase material.

Abstract: The present invention relates to a high impact resistant polymeric composition comprising a polyester and a thermally stable modified selectively hydrogenated block copolymer wherein at least one acid compound or a derivative thereof is grafted to the block copolymer. Poly(alkylene terephthalates) are preferred thermoplastic polyesters. The block copolymer will comprise at least one polymeric block of a monoalkenyl arene and at least one polymeric block of at least one conjugated diolefin.

Abstract: An agent is provided which renders compatible at least two incompatible thermoplastic polymers. The agent contains one di- or trisequenced copolymer comprising at least one N-vinyl pyrrolidone or methyl (meth) acrylate telomer and one mono- or difunctional oligomer selected from the group consisting of an ethylenically unsaturated polymerizable monomer, or a polycondensable monomer, or a lactam. The agent is prepared by condensation of the telomer with the oligomer and is used in the preparation of alloys of incompatible thermoplastic polymers.

Abstract: The present invention is directed to an epoxy-containing polymeric material having nonlinear optical properties, particularly a glycidyl amine polymer, and a process for making the nonlinear optical (NLO) epoxy-containing polymeric material including poling the polymeric material under high voltage at elevated temperature for a period of time to bring about orientation of the nonlinear optical functionalities in the polymer. The polymers have enhanced thermal stability and good NLO properties.

Abstract: Compatibilizing agents suitable for blending otherwise immiscible polymers comprise a block or graft copolymer in which at least one of the block segments is formed by a living anionic polymerization and thereafter chemically converted to provide a polymer having at least one functional end group. The functional groups of the polymer blocks thus formed are reacted with a functionalized monomer, or an oligomer to provide a second block polymer segment. Compatibilizing agents containing more than two blocks may be formed in similar fashion. The compatibilizing agents are used to provide uniform blends of polar and non-polar polymers having superior uniformity and other physical properties.

Abstract: An epoxy resin modified material is disclosed, which is obtained by reacting an epoxy resin and a phenolic hydroxyl group-containing aramid/polybutadiene-acrylonitrile block copolymer represented by formula (I): ##STR1## wherein Ar.sup.1 and Ar.sup.3 each represent a divalent aromatic group; Ar.sup.2 represents a phenolic hydroxyl group-containing divalent aromatic group; x represents an integer of from 3 to 7; y represents an integer of from 1 to 4; y/(x+y) is from 0.1 to 0.3; z represents an integer of from 5 to 15; m represents an integer of from 1 to 400; n represents an integer of from 1 to 400; n/(m+n) is from 0.01 to 0.50; and l represents an integer of from 1 to 50. An epoxy resin composition containing the epoxy resin modified material is also disclosed.

Abstract: The present invention is directed to poly-.alpha.-olefin/polyurethane block copolymers which are prepared by reactingA) isocyanate-reactive functionalized poly-(C.sub.2 -C.sub.10 -.alpha.-olefins) having a number average molecular weight M.sub.w of about 1000 to 350,000,B) polyisocyanates, isocyanate prepolymers or modified polyisocyanates, and, optionally,C) isocyanate-reactive synthesis units containing Zerewitinoff-active hydrogen atoms and having a molecular weight of 400 to about 5000 and, optionally,D) low molecular weight isocyanate-reactive chain extending agents having a molecular weight of 32 to 399.The present invention is also directed to this process for preparing the poly-.alpha.-olefin/polyurethane block copolymers and to their use as polymer dispersants for the production of polymer blends, as primers or modifiers or for the production of moldings or coatings.

Abstract: A process for preparing free flowing pellets of thermosetting resin. The process includes the steps of polymerizing in the presence of a polymerization solvent the A forming component of a peroxide curable, tacky, cold flowing block copolymer AB, to form an active block; end capping the active block with a polyisocyanate compound; forming a solution of a non-cold flowing rubber; charging the solution simultaneously with the addition of the B forming component of the block copolymer AB with heat to form a thermosetting resin; removing the polymerization solvent; forming pellets of the resin, free from cold flow; subjecting the pellets to a surface treatment whereby a coating is provided to remove tack; and thereafter separating the pellets to yield a free flowing thermosetting resin comprising from about 55 to 95 parts by weight of the tacky, cold flowing block copolymer and from about 5 to 45 parts by weight of the non-cold flowing rubber and which upon cure has a flexural modulus of from about 1.

Abstract: The present invention relates to sulfur vulcanized elastomers containing aramid-polydiene copolymers. When compounded with the elastomers, the aramid-polydiene copolymers improve the reinforcing nature of the elastomers.

Abstract: Curable unsaturated polyester resin compositions from which molded products with superior surface smoothness can be obtained include a block copolymer of a specified form, an unsaturated polyester, a vinyl monomer, a filler, a curing catalyst and a reinforcing fiber. The block copolymer is of the form A--(B).sub.n where A is non-hydrogenated polyisoprene block having viscosity average molecular weight of 10000 or more, B is saturated polyester block obtainable by condensation of organic dicarboxylic anhydride and 1,2-epoxide, more than 50 mol % of terminal groups of the polyester block being carboxylic acid group, A and B are connected by ester linkage and n is not less than 2. Block copolymers of this type can be formed by starting with carboxylic acid or hydroxyl group in polyisoprene and by alternate condensation of organic dicarboxylic anhydride and 1,2-epoxide.

Abstract: 4-component thermoplastic molding compositions which are easily processed on injection molding or extrusion machinery consisting essentially of amorphous copolyamides which can be produced from inexpensive raw materials, inexpensive elastomeric block polyetherpolyamides and block polyetheresterpolyamides as well as commercially available modified copolyolefins and are distinguished by high cold impact resistance, good ductility, variably adjustable rigidity which is independent of the degree of humidity and excellent pigment compatibility as well as by good stress crack resistance, thermal and dimensional stability.

Abstract: The present invention relates to a method of improving the adhesion between an aramid cord and sulfur vulcanized rubber comprising (a) treating the aramid cord with a copolymer of the structural formula: ##STR1## wherein w is an integer of from 1 to 100, y is an integer of from 10 to 500; z is an integer of from 1 to 120; X is: ##STR2## or mixtures thereof; B is: ##STR3## or mixtures thereof; wherein R is selected from the group consisting of H, Cl or CH.sub.3 ; and(b) vulcanizing a composite of the treated cord and rubber.

Abstract: Articles molded from a moisture shrinkable polymer are provided. The article are stretched. The moisture shrinkable polymer may comprise a graft copolymer, a block copolymer, or a blend of a thermoplastic polymer with a hydrophilic synthetic polymer or a polysaccharide. The article absorb moisture and shrink at room temperature of not more than 50.degree. C. in a highly humid atmosphere. The articles experience little decrease in tensile strength during shrinkage by moisture absorption or by prolonged storage after the moisture absorption. The article is useful when used as a film for shrink wrapping commodities which are not resistant to heat.

Abstract: A process of blow molding, and compositions useful in the process. The articles are blow molded from compositions formed from thermoplastic polymeric material, a fluorinated olefinic polymer or copolymer and, optionally, an elastomeric impact modifier.

Abstract: Curable elastomer compositions having improved extrusion resistance comprise from about 50 to 90 parts by weight of a homogeneous blend of rubber, selected from the group consisting of natural and synthetic rubbers and blends thereof, and from about 10 to 50 parts by weight of a block copolymer containing elastomeric blocks and crystalline blocks. The elastomer compositions of the present invention have particular utility as oil well packers. A method for improving the extrusion resistance of curable elastomer compositions comprises the steps of blending together an elastomer, selected from the group consisting of natural and synthetic rubbers and blends thereof with a block copolymer containing elastomeric blocks and crystalline blocks to form a mixture and then curing the mixture.

Abstract: Tough transparent thermoplastics blends may be prepared by blending 10 to 99 weight percent of a block copolymer; 0.1 to 1 weight percent of particulate rubber having a particle size from 0.1 to 10 microns; and the balance a clear glassy polymer. These clear polymers are useful in a number of applications, particularly for those applications requiring quite high toughness and transparency such as packaging, containers or protective covering.

Abstract: A blend of a polyolefin and a poly(alkyl vinyl ether) can be blended at elevated temperature to form a copolymer of the polyolefin and poly(alkyl vinyl ether). The resulting composition is useful as a compatibilizer, as a more water permeable substrate than the polyolefin, and as a photo-degradable material.

Abstract: A modified block copolymer composition comprising a thermoplastic polymer and a modified block copolymer consisting essentially of a base block copolymer of a monovinyl substituted aromatic hydrocarbon polymer block and an olefin compound polymer block having an ethylenic unsaturation degree not exceeding 20%, the base block copolymer having a molecular unit containing a carboxylic acid group and/or a group derived therefrom grafted thereto. The modified block copolymer composition of the present invention is a resinous composition excellent in impact resistance, adhesion, paint adhesion, weatherability, resistance to thermal deterioration, transparency and gloss or a rubbery or leather-like composition excellent in heat resistance, abrasion resistance, compression set resistance, adhesion, transparency, oil resistance, weatherability and resistance to heat aging.

Abstract: This invention relates to thermoplastic moulding compositions of PVC and poly-.alpha.-olefine/polyurethane block copolymers and poly-(C.sub.2 -C.sub.10 -.alpha.-olefines) which have been functionalized in relation to isocyanate groups, preferably polypropylene, di- or higher poly-isocyanates or isocyanate prepolymers and optionally relatively high molecular weight polyols and/or low molecular weight chain lengthening agents.

Abstract: Improved thermoplastic elastomeric compositions adopted for easy conversion, e.g., by injection molding or extrusion techniques, into useful shaped articles having good abrasion and tear resistance, and marked resistance to oils and fats, include a polyetheramide, advantageously a polyetheresteramide, and a nitrile rubber, e.g., a copolymer of 1,3-butadiene or isoprene with (meth)acrylonitrile.

Abstract: Described are novel thermosetting epoxy resin compositions suitable for making cured resins, prepregs and stiff, tough thermoset composites. The thermosetting compositions comprise a polyepoxide component, an amine hardner and a specified amount of certain aromatic oligomers containing functional groups which are reactive with the polyepoxide and/or hardener under curing conditions for the composition. The cured resins have a multiphase morphology which comprises at least one glassy continuous phase and at least one glassy discontinuous phase and have a fracture toughness, K.sub.IC, of at least 1.0 MPam.sup.1/2.

Abstract: The elastoplastic composition comprises a blend of a thermoplastic polyolefin resin, such as polypropylene, and vulcanized epoxidized natural rubber and has good oil resistance without the use of nitrile rubber and has good mechanical properties without the need for compatibilizing agents. The elastoplastic composition may be prepared by a method which comprises mixing the thermoplastic polyolefin resin and epoxidized natural rubber at a temperature sufficient to soften or melt the resin to give an intimate blend, then while continuing mixing, adding curative for the rubber and vulcanizing the epoxidized natural rubber at a vulcanization temperature.

Abstract: The surface of a polymer material is modified by adding to the material a block copolymer. The block copolymer has a hydrophilic polymer portion and a polymer portion which is compatible with the polymer material to be modified. The block copolymer can be easily synthesized in the presence of a polymeric peroxide and can easily and permanently modify the surface of the polymer material.

Abstract: The surface of a polymer material is modified by adding to the material a block copolymer. The block copolymer has a hydrophilic polymer portion and a polymer portion which is compatible with the polymer material to be modified. The block copolymer can be easily syntheized in the presence of a polymeric peroxide and can easily and permanently modify the surface of the polymer material.

Abstract: Optically clear lenses, particularly contact lenses, may be prepared from an alloy of a polyacrylate resin and a siloxane-styrene copolymer, the alloy having an oxygen permeability greater than the polyacrylate resin. Preferably the polyacrylate is polymethylmethacrylate or methylacrylate-ethylacrylate copolymer, and the siloxane-styrene copolymer is preferably a polydimethylsiloxane-alpha-methylstyrene block copolymer. The alloy composition may be produced by melt mixing, preferably by polymerizing acrylate monomers in the presence of siloxane-styrene copolymer.

Abstract: A polymeric material which is superior in mechanical strength, dimensional stability, moldability and resistances to chemicals, heat and abrasion comprises a copolymer composed of polymer chain moieties of a copolymer containing an imide compound of an .alpha.,.beta.-unsaturated dicarboxylic acid and polymer chain moieties of a polyamide, both chain moieties being bonded to each other. The material may be blended with thermoplastic resins. Furthermore, the material may be reinforced with glass fiber, etc.

Abstract: Electronic components are encapsulated with a poly(arylene sulfide) composition containing hydrogenated conjugated diene/monovinyl-substituted aromatic copolymer. The invention also includes certain encapsulation compositions containing poly(arylene sulfide), hydrogenated conjugated diene/monovinyl-substituted aromatic copolymer, reinforcement and filler.

Abstract: A hot melt adhesive especially useful for producing PET bottle assemblies comprises a blend of: (1) a block copolymer selected from the class consisting of: (a) A-B-A block copolymer where A is a monovinyl aromatic hydrocarbon and B is either a conjugated diene or a rubbery mono-olefin and (b) a teleblock copolymer comprising molecules having at least three branches radially branching out from a central hub, each said branch having polystyrene terminal blocks and a butadiene segment in the center; (2) an ethylene/vinyl acetate copolymer; (3) a tackifying resin which serves to extend the adhesive properties of the system; (4) a stabilizer; and (5) a wax or oil diluent. PET bottle assemblies prepared using the above adhesive compositions are more resistant to separation than those prepared with prior art compositions not containing the ethylene/vinyl acetate copolymer.

Abstract: Thermoplastic compositions of polyphenylene ether resin and diblock or radial teleblock copolymer of an alkenyl aromatic compound and a conjugated diene (which can be hydrogenated) containing polyolefin resin in large amount are described. The compositions are moldable into articles which do not exhibit the brittleness and tendency toward delamination often associated with use of large amounts of polyolefin.

Abstract: Thermoplastic compositions comprising, in intimate admixture, polyethylene terephthalate and a rubber-modified graft copolymer of a vinyl aromatic compound and an .alpha.,.beta.-unsaturated cyclic anhydride. These compositions display desirable thermal properties, particularly elevated heat deflection temperatures.

Abstract: The stability to phase separate solutions of unsaturated polyesters, vinyl ester resins or mixtures thereof and an elastomeric additive is improved by the use of a compatibilizing agent which is the ester of a carboxyl terminated diene polymer and a polyoxyalkylene.

Abstract: Thermoplastic moldingcompositions having improved melt-flow characteristics and enhanced impact resistance characteristics are disclosed which comprise in intimate admixture (a) a polyphenylene ether resin, (b) a plasticizer composition, and (c) a minor amount of a hydrogenated radial teleblock copolymer of a vinyl aromatic monomer and a saturated rubber.

Abstract: A process for producing uniformly spherical particles of crystalline, normally solid condensation polymers is described. The process of this invention further provides high yields of hydrophobic, non-agglomerating particles in a useful size range directly, without the need for subsequent processing, and is carried out by forming a dispersion of small liquid particles of the crystalline polymer in certain aprotic liquids containing 0.1 to 20% by weight of the polymer of a water-insoluble block or graft copolymer having at least one polymeric component which is soluble in the aprotic liquid and at least one other polymeric component which is insoluble in the aprotic liquid and associates with the crystalline polymer, in a specified manner, cooling the dispersion with agitation until the liquid particles solidify and recovering the particles.

Abstract: A hydrocarbon-derived, tack enhancing, diolefin/olefin backboned resin prepared by reacting, in the presence of an aliphatic hydrocarbon solvent and a selected catalyst, a monomer mixture comprised primarily of a diolefin/olefin mixture, of the piperylene/olefin type, and about 2 to about 12 weight percent .alpha.-methyl styrene.The resin has a particular application for use as a tackifier with styrene-isoprene-styrene block copolymers.

Abstract: Modified thermoplastic polyester compositions are provided which comprise (a) a poly(1,4-butylene terephthalate) resin in combination with a poly(ethylene terephthalate) resin and/or a polyester copolymer and (b) a modifier therefor comprising a combination of a selectively hydrogenated monoalkenyl arene-diene block copolymer resin and an aromatic polycarbonate. The compositions can include (c) reinforcing glass fibers and/or (d) a flame retardant. Modifier (b) provides enhanced resistance to impact fracture, increased strength and improved resistance to heat distortion in articles molded from the compositions.

Abstract: Novel block copolymers of acrylonitrile having good gas-barrier and impact-resistance properties are prepared by copolymerizing acrylonitrile and another comonomer, such as methyl acrylate, using an elastomer prepolymer containing free-radical initiator groupings as the copolymerization initiator.