Abstract: Ionomer compositions which have improved optical properties are disclosed. These compositions comprise ionomers which can be represented as the polymerization product of alpha-olefins having from two to eight carbon atoms, esters of alpha, beta-ethylenically-unsaturated carboxylic acids, metal salts of acrylic and methacrylic acid, and optional alpha, beta-ethylenically-unsaturated comonomers which impart some desired polymer property or properties, such as acidity and/or solvent resistivity. Also disclosed are methods of making these ionomer compositions in a reactive extruder and treating the compositions with acid to impart acidity to the compositions or to only the surface of the compositions.

Abstract: Blends of chlorinated polyvinyl chloride and chlorinated polyethylene and methods for preparing extruded profiles such as a window spacer, a glazing bead, a window lineal, and a track for lighting, having smooth surface characteristics are disclosed. The blends comprise 100 weight parts CPVC containing from 62% to 72% chlorine, preferably 65% to 71% chlorine and from 10 to 30 weight parts, preferably 15 to 25 parts of chlorinated polyethylene containing from 25 to 45% chlorine and extruding the blend. The preferred embodiments of the invention are further defined by a particular combination for the chlorine content of CPVC, the real weight average molecular weight of CPE (M.sub.w) and polydispersity (M.sub.w /M.sub.n), defined as the ratio of the weight average to number average molecular weight, and extrusion shear rate.

Abstract: A thermoplastic composition comprising a crystalline propylene polymer and as a modifying elastomer, a hydrogenated butadiene polymer which is either an essentially linear hydrogenated butadiene homopolymer or a star-branched polymer, the arms of which are an essentially linear hydrogenated butadiene homopolymer, such hydrogenated butadiene polymer containing from about 20 to about 90% of polymerized butadiene units with the 1,2-microstructure and having a polydispersity index (P.I.) of about 1.01 to 1.50. The compositions have a superior combination of processing and mechanical properties such as flexural strength, impact resistance, and melt flow.

Abstract: A pneumatic tire for all seasons comprises a tread provided with a foamed rubber containing a given amount of a particular resin such as crystalline syndiotactic 1,2 -polybutadiene having specified hardness and average particle size, and having specified expansion ratio, average expanded cell size and storage modulus (E') at -20.degree. C. of a given range, and exhibits satisfactory braking and traction performances at not only dry-on-ice state but also wet-on-ice state while sufficiently holding the steering stability, durability and low fuel consumption in summer season.

Abstract: A rubber composition composed of (A) a hydrocarbon rubber, (B) a vulcanizing agent and/or crosslinking agent, and (C) a hydrogenated petroleum resin having a bromine number not greater than 10 (g/100 g). The rubber composition exhibits improved processability over hydrocarbon rubber used alone but has no bad influence on the physical properties and heat resistance of its vulcanizate. It is free from any trouble involved in crosslinking with a peroxide which is often used for EPR and EPDM. Therefore, it will find general use in the rubber industry.

Abstract: In a golf ball comprising a cover around a core, the cover is formed of a resin blend of 10-60 parts by weight of a thermoplastic elastomer having a crystalline polyethylene block and 90-40 parts by weight of an ionomer resin. The ball is well controllable, highly repulsive, and resistant to scuffing upon iron shots and offers pleasant hitting feel.

Abstract: Graft copolymers which are isoolefin/para-alkylstyrene copolymer represented by the formula ##STR1## in which R and R' can be hydrogen, alkyl, and the primary and secondary alkyl halides, "a" ranges from about 14 to about 70,000, "b" ranges from 0 to about 70,000, "c" ranges from 0 to about 70,000, "d" ranges from about 1 to about 70,000, X is a halogen, and Nu is a nucleophilic residue provided by a polymeric nucleophile.

Abstract: Blends of previously-vulcanized fluoroelastomer with fluorine-free elastomer can be cured to have unexpectedly excellent physical properties.

Abstract: A method of compatibilizing a blend of at least a hydrocarbon polymer with at least one other polymer which is incompatible with the hydrocarbon polymer, said method comprising adding to the polymer blend a compatibilizer which is an isoolefin/para-alkylstyrene copolymer represented by the formula ##STR1## in which R and R' can be hydrogen, alkyl, and the primary and secondary alkyl halides, "a" ranges from about 14 to about 70,000, "b" ranges from 0 to about 70,000, "c" ranges from 0 to about 70,000, "d" ranges from about 1 to about 70,000, X is a halogen, and Nu is a nucleophilic residue provided by a polymeric nucleophile.

Abstract: Disclosed is a syndiotactic propylene copolymer containing 0.01 to 40 mol % of olefin units containing --OH group in the side chain. Of absorption peaks attributed to the methyl groups of the propylene units on an absorption spectrum by .sup.13 C-NMR of the copolymer, the intensity of an absorption peak observed at about 20.2 ppm is 0.3 or more of the intensity of absorption peaks of all the methyl groups attributed to the propylene units. The copolymer is produced by copolymerizing propylene and an alkenylsilane or alkenylborane compound in the presence of a catalyst system comprising an asymmetric ligands-having transition metal compound and an aluminoxane, followed by heat-treating the resulting propylene-alkenylsilane copolymer in the presence of a trialkylamine oxide and KF.HF or oxidizing and decomposing the resulting propylene-alkenylborane compound copolymer. Also disclosed is a resin composition comprising the copolymer and other polyolefin(s).

Abstract: Heat sealed articles and heat sealable films comprising a polymer blend of a first polymer having a narrow molecular weight and composition distribution and a second polymer having a broad molecular weight distribution and composition distribution. The articles and films have significantly improved physical characteristics and remarkably low heat seal initiation temperatures, high seal strength, high hot tack and therefore provide improved processibility and higher line speeds on commercial heat sealing equipment.

Abstract: The present invention is directed to a golf ball cover comprising a blend of copolymers wherein one or more of the copolymers is a low cost non-ionic copolymer and one or more of the copolymers is an ionic copolymer. Surprisingly, a golf ball cover comprising the non-ionic/ionic copolymer blend exhibits no loss in C.O.R., and has equal resistance to cutting and cracking when compared to top grade golf ball covers made with one of the conventional 100% ionic copolymer blends. In particular, the present golf ball cover comprises from about 95 to about 80 pphr of one or more ionic copolymers, and from about 5 to about 20 pphr of one or more non-ionic copolymers, the latter being selected from the group consisting of a copolymer or terpolymer of ethylene or propylene; acrylic acid or methacrylic acid; a lower alkyl acrylate, and blends thereof.

Abstract: A polyketone is contacted with an organic peroxyacid in a reactive, oxidization, slurry process to produce a polyester polymer.

Abstract: A thermoplastic elastomer composition which comprises (I) 99 to 1% by weight of a hydrogenated diene copolymer having a number average molecular weight of 50000 to 700,000 in which 80% or more of the double bonds of the conjugated diene portion of the conjugated diene polymer have been saturated, (II) 1 to 99% by weight of an ionomer resin having an .alpha.-olefin unit having 2 to 8 carbon atoms and an .alpha.,.beta.-unsaturated carboxylic acid unit, at least part of the carboxyl group of said unsaturated carboxylic acid unit having been neutralized with a metal ion, and (III) 0 to 70% by weight of a polyolefin resin, provided that (I)+(II)+(III)=100% by weight. Said composition is excellent in moldability and gives a molded article excellent in transparency, flexibility, mechanical strength, heat resistance and impact resilience.

Abstract: Intervulcanized compositions having improved curing efficiency are prepared by the free radical curing of a mixture of an ethylenically unsaturated diolefin polymer such as natural or synthetic rubber and a saturated or low unsaturation polymer such as an isobutylene/para-methylstyrene copolymer which contains functional groups pendant to the polymer chain. These functional groups contain an olefinic or vinyl double bond positioned alpha, beta to a substituent group which activates the double bond towards free radical addition reactions with the diolefin polymer. Preferred functionality includes benzylic ester functionality represented by the structure: ##STR1## wherein R.sub.2 and R.sub.3 are independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, and R.sub.4 is selected from hydrogen, C.sub.1 to C.sub.28 alkyl, aryl or C.sub.2 to C.sub.28 alkenyl.

Abstract: A graft polymer wherein an iodine-containing fluororubber has been grafted on an ethylene-.alpha.-olefin copolymer or other polymer can be obtained by mixing 30 parts by weight of an iodine-containing fluororubber (a vinylidene fluoride-hexafluoropropylene copolymer containing iodine) and 70 parts by weight of an ethylene-propylene copolymer rubber at 180.degree. C. for 30 minutes while applying shear deformation using a Brabender mixer.

Abstract: A sealable film is disclosed comprising (i) a base layer comprising polypropylene and a hydrocarbon resin and (ii) at least one top layer comprising (a) an ethylene/propylene copolymer having an ethylene content of not more than about 10% by weight, (b) a propylene/1-butene copolymer, (c) a propylene/ethylene/alpha-olefin terpolymer, or (d) a blend of two or more of (a), (b) and (c), wherein at least one of said base layer and said at least one top layer contains an anti-blocking agent or lubricant. The film possesses improved barrier properties with respect to permeability to water vapor and oxygen, and which at the same time exhibits favorable slip properties and low shrink values.

Abstract: A heavy duty vehicle pneumatic tire comprising a tread, wherein the tread is composed of a diene-based rubber composition, and crystalline syndiotactic-1,2-polybutadiene is incorporated into said rubber composition in an amount of 5 to 60 parts by weight relative to 100 parts by weight of a diene-based rubber component of the rubber composition. The syndiotactic 1,2-polybutadiene has a melting point of 130.degree. to 170.degree. C., an average particle diameter of not more than 100 .mu.m, and a ratio of a major axis to a minor axis (L/D) being not more than 3. The content of 1,2-structural units in the syndiotactic-1,2 polybutadiene is not less than 75% by weight, and a syndiotacticity of the 1,2-structural units is not less than 75%.

Abstract: The present invention provides a golf ball with preferred hit feeling, controllability and satisfactory level of flying performance and cut resistance. The golf ball comprises a core and a cover covering the core, wherein said cover is mainly made of a mixture composed of an ionomer resin and a diene type rubber at a weight ratio (ionomer resin:diene rubber) of 95:5-60:40 and said diene type rubber is crosslinked by a crosslinking agent.

Abstract: A dynamically vulcanized thermoplastic composition is provided which comprises a polymer blend of (a) a thermoplastic olefinic resin, such as non-elastomeric ethylene vinyl acetate copolymer; (b) an elastomeric ethylene vinyl acetate copolymer having a relatively higher vinyl acetate content; and (c) a specified elastomeric copolymer, such as halobutyl rubber, EPDM, or a halogenated copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene. Halogenated polyethylene may also be incorporated in the composition. The dynamically vulcanized thermoplastic composition is suitable for adhesion to polyvinyl chloride.

Abstract: The present invention provides for compatibilized elastomer blend compositions based on a preferred mixture of a copolymer of a C.sub.4 to C.sub.7 isoolefin, such as isobutylene, copolymerized with a para-alkyl styrene comonomer, such as para-methyl styrene wherein at least some of the alkyl substituent groups present in the styrene monomer units contain halogen, and at least one dissimilar elastomer, said blend composition further containing, as a compatibilizer, minor amounts of a copolymer of ethylene and vinyl acetate or a copolymer of ethylene, a lower alkyl acrylate or methacrylate and, optionally, a third comonomer based on acrylic or methacrylic acid.

Abstract: A pneumatic rubber tire having a rubber sidewall composition containing trans 1,4-polybutadiene rubber and at least one additional rubber.

Abstract: A chlorosulfonated or chlorinated polyethylene dispersed in a polyolefin, vulcanized and then the vulcanizate dispersed into a thermoplastic chlorosulfonated or chlorinated polyethylene forming a partially crosslinked thermoplastic chlorosulfonated or chlorinated polyethylene vulcanizate having good interply adhesion, hot weld strength, commercial processability, and crack resistance.

Abstract: A curable halobutyl rubber/polyepihalohydrin rubber blend comprises a cure system consisting essentially of (a) sulfur, (b) sulfur accelerator, (c) zinc-containing promoter, (d) urea or urea derivative vulcanization accelerator and, optionally, (e) di- or tri-mercapto nonsulfur curative such as 2,4,6-trimercapto-1,3,5-triazine. The halobutyl rubber/polyepi-halohydrin rubber blends that are crosslinked with the cure system of this invention exhibit excellent scorch safety and cure rate, as well as a high degree of crosslinking, and are useful in the manufacture of tire inner tubes and inner liners.

Abstract: A rubber composition including (i) a partially hydrogenated unsaturated nitrile-conjugated diene copolymer having an iodine value not larger than 120, (ii) an ethylene-propylene copolymer and (iii) a material selected from an ethylene-vinyl acetate copolymer, an acrylic rubber and a halogenated butyl rubber. The rubber composition prodides a vulcanized rubber having an improved constant-elongation fatigue performance, as well as balanced thermal resistance, oil resistance and other properties.

Abstract: A process for formulating non-hysteretic and hysteretic Josephson junctions using HTS materials which results in junctions having the ability to operate at high temperatures while maintaining high uniformity and quality. The non-hysteretic Josephson junction is formed by step-etching a LaAlO.sub.3 crystal substrate and then depositing a thin film of TlCaBaCuO on the substrate, covering the step, and forming a grain boundary at the step and a subsequent Josephson junction. Once the non-hysteretic junction is formed the next step to form the hysteretic Josephson junction is to add capacitance to the system. In the current embodiment, this is accomplished by adding a thin dielectric layer, LaA1O.sub.3, followed by a cap layer of a normal metal where the cap layer is formed by first depositing a thin layer of titanium (Ti) followed by a layer of gold (Au). The dielectric layer and the normal metal cap are patterned to the desired geometry.

Abstract: A thermoplastic resin composition having good coating affinity is disclosed, which comprises (a) from 20 to 80 parts by weight of a resin component containing a modified polyolefin resin which has been graft-modified with an unsaturated hydroxy group-containing compound or an unsaturated carboxylic acid, (b) from 80 to 20 pats by weight of a rubber component containing a copolymer rubber, and (c) a functional group-terminated oligomer in an amount of from 0.1 to 20 parts by weight per 100 parts by weight of the sum of components (a) and (b).

Abstract: Star polymers having first polymeric arms comprising a hydrogenated conjugated diene and smaller second polymeric arms of a methacrylate resist coupling of methacrylate blocks attached to different cores and have improved performance as viscosity index improvers. The polymerized methacrylate units are converted to amide or imide groups by reaction with a primary or secondary amine to give the viscosity index improver dispersant properties.

Abstract: A pneumatic tire having a sulfur cured tread is provided comprised of at least one diene rubber and a low density polyethylene having a crystalline melt point in a range of about 104.degree. C. to about 115.degree. C., wherein the said LDPE is mixed with the said rubber at a temperature of about 120.degree. C. to about 170.degree. C. prior to sulfur vulcanizing the blend.A process is also provided for producing a tire in which a hot cured tire is removed from its rigid mold where the tread is comprised of at least one diene rubber and a low density polyethylene (LDPE) having a crystalline melt point in a range of about 104.degree. C. to about 115.degree. C.; and wherein the said LDPE is mixed with the said unvulcanized rubber at a temperature of about 120.degree. C. to about 170.degree. C.

Abstract: The present invention relates to improved cover compositions for golf ball construction. The cover compositions comprise a blend of polar modified thermoplastic elastomers and ionomer resins. In addition, the present invention is directed to golf balls produced utilizing the improved cover compositions. The golf balls exhibit properties of enhanced playability without sacrificing distance and/or durability.

Abstract: A lubricant additive which is the reaction product of polyvinylpyridine and sulfonated polyisobutylene is oil soluble and provides clear solutions in oil. These reaction products are ionic graft copolymers. The reaction products of the invention form solutions with lubricant base stocks, such as mineral oil, and are excellent Viscosity Index enhancers. Moreover, the reaction products of the invention act as thickening agents for the oil or grease of the lubricant composition of the invention, at very low levels of reaction product content.

Abstract: Thermosetting compositions which are excellent in storage stability, useful as one component thermosetting compositions, give cured products having excellent chemical properties, physical properties and weathering resistance and favorably utilized in coating compositions, ink, adhesive and molded plastics. The thermosetting compositions comprises a compound having in the molecule two or more hydroxyl groups and/or thiol groups blocked by a vinyl ether compound, a vinyl thioether compound or a heterocyclic compound having a vinyl type double bond and oxygen or sulfur as the hetero atom, a compound having two or more reactive functional groups which can form a chemical bond with the blocked hydroxyl and/or thiol compound by heating and a thermal latent acid catalyst. The blocked hydroxyl and/or thiol group of the first compound and the reactive functional group of the second compound may be comprised in the same molecule.

Abstract: In order to increase the modulus properties of a rubber compound it is desirable to achieve control of the cure morphology within a rubber matrix. The placement of curatives in a rubber matrix can be controlled by incorporating the curatives into a carrier and mixing the carrier with a rubber compound. In a preferred embodiment, the carrier can be made having the morphology of a short fiber, and the curatives can be oriented like a short fiber.

Abstract: The present invention relates to hydrogenated block copolymers of butadiene and at least one other diene, preferably isoprene. The copolymer is hydrogenated and comprises at least 10% by weight of at least one crystallizable segment and at least one low crystallinity segment.

Abstract: A partially crosslinked thermoplastic resin composition is prepared by dynamically heat-treating a thermoplastic resin (A) in the presence of a carbon radical inducing agent (B) comprising a charge transfer complex or a combination of a hydrogen donating compound and a hydrogen accepting compound.

Abstract: Low molecular weight olefin resins are blended with small amounts of high molecular weight olefin resins and the blends are chlorinated or chlorosulfonated. Melt and film strengths of the resultant low molecular weight chlorinated and chlorosulfonated resins are thereby increased sufficiently to enable recovery by means of methods which require film or strand formation. The chemical properties and solution characteristics of the blends are substantially maintained compared to those of the low molecular weight chlorinated resins themselves.

Abstract: This invention relates to novel compositions of matter, fullerene graft amine-containing polymers, and the process of making them. The graft is made by reacting a fullerene with a primary or secondary amine-containing polymer, preferably a hydrocarbon containing polymer in effective amounts, typically from about 10:1 to about 1:10 mole ratio of reactive amine in polymer to fullerene for a time and under conditions effective to produce the compositions. Suitable starting polymers are those containing primary or secondary amino groups, e.g., EPDM amine, PIB-amine, PIBSA-PAM, and Mannich based polymers. The preferred polymers are oil soluble, as the novel compositions of that type may be used as viscosity modifiers and lube additives. The crosslinked compositions may be used in essentially any application as the original polymer, but in which an increase in tensile strength would be desired.

Abstract: A chlorosulfonated or chlorinated polyethylene dispersed in a polyolefin, vulcanized and then the vulcanizate dispersed into a thermoplastic chlorosulfonated or chlorinated polyethylene forming a partially crosslinked thermoplastic chlorosulfonated or chlorinated polyethylene vulcanizate having good interply adhesion, hot weld strength, commercial processability, and crack resistance.

Abstract: Polymers comprising blocks of a hydrogenated conjugated diene (B), a vinylarene (A), and an alkyl methacrylate (M), are readily prepared as a mixture of molecules having the structures B-A-M and B-A-M-A-B wherein both structures are effective as viscosity index improvers for oil compositions. Reaction of the polymers with a primary or secondary amine results in a dispersant viscosity index improver.

Abstract: A thermoplastic resin composition according to the present invention comprises a polymer comprising recurring units derived from a polycyclic (meth)acrylate represented by the following formula [I] and a soft polymer in the proportion by weight of the polymer to the soft polymer of 99:1 to 40:60 ##STR1## wherein m is 0 or a positive integer, n is 0 or 1, R is hydrogen or methyl, R.sup.1 -R.sup.18 are independently an atom or a group selected from the group consisting of hydrogen, halogen and hydrocarbon groups, R.sup.15 -R.sup.18, linked together, may form a monocyclic or polycyclic group which may have a double bond, or an alkylidene group, p is 0 or 1, and R.sup.a and R.sup.b each independently represent a hydrogen atom or a hydrocarbon group when p is 1.

Abstract: The present invention provides a rubber composition which comprises the following components (A) and (B):(A) an ethylene copolymer rubber comprising ethylene and at least one compound selected from the group consisting of acrylic esters and methacrylic esters as constituting units, and(B) a hydrogenated unsaturated nitrile-conjugated diene copolymer rubber.This composition is well balanced in its properties such as strength characteristics, oil resistance, low-temperature resistance and ozone resistance.

Abstract: Chlorinated ethylene-.alpha.-olefin copolymer rubber of the present invention is characterized in that the content of chlorine bonded to primary carbon atom is 0.6% by weight or more and the content of chlorine bonded to tertiary carbon atom is 1.6% by weight or less. This chlorinated ethylene-.alpha.-olefin copolymer rubber has a high vulcanization speed and excels in heat resistance. Additionally, this thermoplastic elastomer composition consisting of this vulcanizate and crystalline polyolefin resin particularly excels in moldability and processibility.

Abstract: For the preparation of thermoplastic materials based on (a) homopolymers or copolymers of vinyl chloride and (b) polyacrylates having a glass transition temperature of less than -20.degree. C., firstly the acrylate is polymerized in aqueous emulsion in the presence of crosslinking compounds copolymerizable with the acrylates and having at least two nonconjugated double bonds. Secondly, the vinyl chloride or vinyl chloride with up to 20% by weight of copolymerizable monomers is heated with an initiator, a suspension agent system and optionally additives in an aqueous suspension to a temperature of about .gtoreq.30.degree. C. The polyacrylate is subsequently added and polymerization carried out at temperatures of about >30.degree. C. to the desired conversion. The resulting polymers exhibit improved particle size distribution, good reproducibility of the bulk density and in particular caked deposits on the wall are dramatically reduced during polymerization.

Abstract: A method of producing fluorinated elastomeric articles having reduced coefficients of friction, improved wear life and improved resistance to fluid permeability. A thermoplastic elastomeric article is exposed to gaseous fluorine in a reactor vessel under reaction conditions sufficient to create a fluorinated material on the external portions of the elastomeric article, which fluorinated material extends inwardly into the matrix of the article, without promoting degradation of the tensile properties of the article.

Abstract: A covulcanizable polymer blend of a highly unsaturated rubbery polymer and a sulfer imide-modified teropolymer of ethylene, a higher alpha olefin and a non-conjugated diene is provided. Processes for preparing the blend and vulcanizing the blend are also provided.

Abstract: A catalyst comprising a high-molecular complex formed from a palladium compound and a nitrile group-containing polymer, and a method for hydrogenating a conjugated diene polymer which comprises selectively hydrogenating only a carbon-carbon double bond of the conjugated diene polymer using same.

Abstract: Disclosure is herein made of a rubber composition containing at least 30% by weight of a butadiene copolymer which is characterized in that: (i) the content of vinyl bonds in a polybutadiene portion is from 40 to 70%; (ii) the content of bound vinyl aromatic compound is from 25 to 50% by weight: (iii) the ratio Mw/Mn between the weight average molecular weight (Mw) and the number average molecular weight (Mn) when calculated as polystyrene according to the gel permeation chromatograph (GPC) method is from 1.8 to 5, and the distribution of the molecular weight is unimodal; (iv) the rate of the copolymer having the weight average molecular weight of not more than 100,000 when calculated as polystyrene is from 10 to 30%; (v) the rate of the copolymer having the weight average molecular weight of not less than 2,000,000 when calculated as polystyrene is from 10 to 30%; and (vi) the Mooney viscosity (ML.sub.1+4 100.degree. C.) is from 20 to 100.

Abstract: It is highly desirable to be able to cure rubbers quickly since the amount of energy required for the curing process is reduced and the number of articles that can be cured in a mold in a given time is increased. In other words, the cycle time needed to cure articles made from such a rubber is reduced and the throughput of a mold utilized in curing such a rubber is increased. Unfortunately, most attempts to accelerate the cure rate of rubber have resulted in the rubber having poor scorch safety. The present invention discloses a fast curing rubber blend having excellent scorch safety which comprises: (a) from 50 to 98 weight percent of at least one polydiene rubber, and (b) from 2 to 50 weight percent of at least one vinylpyridine copolymer comprised of repeat units which are derived from a diene monomer and vinylpyridine wherein from 1 to 75 weight percent of the repeat units in said copolymer are derived from vinylpyridine.

Abstract: Dispersant/VI improver lubricating oil additives are produced by reacting a star polymer with an alpha, beta unsaturated carboxylic acid or derivative to form an activated star polymer, which is then reacted with (a) at least one compound of general formulaRO(AO).sub.n Hwherein R is a C.sub.4-20 alkyl group, A is an independent moiety of either ethylene or propylene, an n is an integer from 0 to 10, optionally followed by reacting with (b) an alkyl carboxylic acid and/or (c) an alkylamine or alkane polyol, or with the preformed product of reactions (b) and (c), optionally followed by esterifying any residual acid groups with a C.sub.1-6 alkanol.

Abstract: Heat shrinkable thermoplastic compositions are prepared by blending an ethylene copolymer resin with an EPDM rubber and dynamically vulcanizing the rubber. The ethylene copolymer resin is a copolymer of ethylene with an alkyl ester of an alpha, beta monoethylenically unsaturanated monocarboxylic acid as well as copolymers of ethylene with the acid per se. The preferred copolymer is ethylene-vinylacetate copolymer. Uncured rubber can be included in the composition.