Abstract: A vibration-damping resin composition of the invention comprises 10 to 95% by weight of an amorphous thermoplastic resin polymer (a) and 90 to 5% by weight of a crystalline thermoplastic polymer (b) incompatible with the polymer (a). The polymer (a) has a glass transition temperature lower than that of the polymer (b) and a maximum tan.delta. of 0.5 or more within a predetermined temperature and frequency range. The polymer (b) has a melting point higher than the glass transition temperature of the polymer (a) and a shear storage modulus of 1.times.10.sup.8 dyne/cm.sup.2 or more at the temperature and frequency at which the polymer (a) exhibits the maximum tan.delta..

Abstract: Linear low density copolymers (LLDPE) are blended with up to about 10 weight percent of an aromatic polymer, e.g., polystyrene or poly(para-methylstyrene), to give films having improved MD tear strength or equivalent MD tear strength and higher stiffness compared to the LLDPE alone. Also, extruder torque is lower and bubble stability is greater in blown film extrusion with the blends as well as in blends in which medium or high density polyethylene is used instead of the LLDPE.

Abstract: A polymer resin comprising a blend of polypropylene, a copolymer of a vinylaromatic monomer and .alpha.-methylstyrene prepared by anionic polymerization at a temperature above 61.degree. C. and a monovinylidene aromatic polymer grafted .alpha.-olefin copolymer compatibilizing agent.

Abstract: A polymer resin comprising a blend of an olefin polymer, such as polyethylene, a monovinylidene aromatic polymer, such as polystyrene, and a grafted, block copolymer compatibilizing agent. The compatibilizing agent comprises an .alpha.-olefin copolymer substrate grafted with amounts of monovinylidene aromatic polymer. Preferably, the .alpha.-olefin copolymer substrate is a terpolymer of ethylene, propylene and a non-conjugated diolefin. This thermoplastic material has very desirable property combinations, combining the desirable properties from the olefinic and monovinylidene aromatic polymers. The blend can be shaped into final products by thermoforming techniques yet possesses many desirable polyolefin properties such as environmental stress crack resistance.

Abstract: A process for in mold polymerization and a composition for use therein comprising a polymerizable vinyl aromatic monomer and a particulated, semicrystalline nonmiscible polymer.

Abstract: Compatibilized polymer blends are described comprising a blend of olefin polymer, cross-linkable acrylic ester copolymer rubber, and a compatibilizing amount of a graft copolymer comprising acrylic ester copolymer compatibilizing segments and olefin polymer compatibilizing segments.

Abstract: A composition of matter comprising a blend of CPVC having a chlorine content of between about 60% and 65% by weight and styrene-acrylonitrile copolymer having an acrylonitrile content of between about 15% and 25% by weight. The composition of matter displays substantially single, homogeneous phase behavior with the CPVC and styrene-acrylonitrile copolymer being substantially or completely miscible. Blending of CPVC and styrene-acrylonitrile copolymer provides a resulting blended polymeric material having enhanced temperature and durability properties. Melt processability of CPVC polymeric material may be enhanced by the inclusion of styrene-acrylonitrile copolymer to form the blends.

Abstract: A thermodynamically miscible polymer composition containing of a copolymer having recurring units of a C.sub.2 to C.sub.4 .alpha.-olefin and recurring units of an N-aryl substituted maleimide and an acrylonitrile copolymer is disclosed.

Abstract: A composition of matter comprising a blend of CPVC having a chlorine content of between about 60% and 66% by weight and a polymethylmethacrylate content of between about 0% and 80% by weight of the blend. The composition of matter displays substantially single, homogeneous phase behavior with the CPVC and polymethylmethacrylate being substantially or completely miscible. Blending of CPVC and polymethylmethacrylate provides a resulting blended polymeric material having enhanced temperature and durability properties. Melt processability of CPVC polymeric material may be enhanced by the inclusion of polymethylmethacrylate to form the blends.

Abstract: Linear low density copolymers (LLDPE) are blended with up to about 10 weight percent of an aromatic polymer, e.g., polystyrene or poly(para-methylstyrene), to give films having improved MD tear strength or equivalent MD tear strength and higher stiffness compared to the LLDPE alone. Also, extruder torque is lower and bubble stability is greater in blown film extrusion with the blends as well as in blends in which medium or high density polyethylene is used instead of the LLDPE.

Abstract: Novel thermoplastic polyelectrolyte complexes are disclosed which are the reaction products of (a) a polyanion and (b) a polycation wherein one of the polyanion and polycation contains repeating units derived from a soft monomer. By the selection of said soft monomers and of the cation group present in the polycation, moldable, extrudable polyelectrolyte complexes are obtained.

Abstract: Disclosed is a shaped body exhibiting good long-term thermal stability, comprising at least one fluorohydrocarbon polymer which can be processed by melting, and at least one heat-resistant thermoplastic polymer, wherein at least the fluorohydrocarbon polymer forms a phase which is coherent or at least largely coherent. The weight ratio of the fluorohydrocarbon polymer to the thermoplastic polymer preferably varies between about 80:20 and about 20:80. The shaped body is preferably a film used as a layer of insulation.

Abstract: A self-crimping, melt-spun acrylonitrile polymer fiber comprising as the continuous fiber matrix a first polymer comprising from about 80 to about 99 weight percent acrylonitrile and from about 1 to about 20 weight percent of one or more monomers copolymerizable with acrylonitrile and heterogeneously dispersed within said fiber matrix a second polymer incompatible with said first polymer.

Abstract: A dividable short catheter tube made of a modifying polymer intermixed with, or inserted into, a base polymer. The modifying polymer is usually one which is incompatible with the base polymer.The dividable short catheter tube is readily tearable longitudinally so that it can be removed from around a flexible catheter after the flexible catheter has been guided into a patient by means of the short catheter previously positioned in a body puncture.The tube can be extruded from a mixture of the two polymers or it can be extruded with modifying polymer longitudinal strips in walls of the base polymer.

Abstract: The invention relates to flame-retarding filaments and fibers and a process for the manufacture thereof. The filament-forming substance is a mixture of from 20 to 70 weight % of an acrylonitrile copolymer A containing at least 80 weight % of acrylonitrile units and from 0.3 to 20 weight % of other units copolymerizable with acrylonitrile, and from 80 to 30 weight % of an acrylonitrile copolymer B containing from 50 to 75 weight % of acrylonitrile units, from 25 to 45 weight % of vinyl chloride and/or vinylidene chloride units and from 0 to 5 weight % of other units copolymerizable with acrylonitrile.The filaments and fibers have a boil-off shrinkage of at least 20% and a knot strength of at least 10 cN/tex and are obtained by spinning the turbid solutions of the copolymer mixture, which however do not separate into components, in an aprotic solvent, and drawing of the filaments in a moderate ratio.

Abstract: A self-crimping, melt-spun acrylonitrile polymer fiber comprising as the continuous fiber matrix a first polymer comprising from about 80 to about 99 weight percent acrylonitrile and from about 1 to about 20 weight percent of one or more monomers copolymerizable with acrylonitrile and heterogeneously dispersed within said fiber matrix a second polymer incompatible with said first polymer.

Abstract: Polymeric material in the form of fibrids is produced by preparing (1) a homogeneous liquid phase of a first polymeric material and solvent and (2) a second phase of other polymeric material which is incompatible with the first polymeric material and solvent. Phases (1) and (2) are mixed together in such proportions that the quantity by weight of the first polymeric material is greater than that of the second polymeric material in the mixture. The mixture is furnished with sufficient energy to render it flashable and is then subjected to a flash-spinning so that polymeric material in the form of fibrids is produced and those fibrids are thereafter collected.

Abstract: A copolyester compositon which exhibits good bonding characteristics to polyvinyl chloride, good impact resistance, and improved resistance to crazing or cracking in the presence of solvents such as alcohol. The composition consists essentially of (a) 80 to 95 percent by weight of a generally rigid poly(ethylene cyclohexanedimethylene terephthalate) in which from 2 to 20 molar parts of ethylene units are present per one molar part of cyclohexanedimethylene units, and (b) from 5 to 20 percent by weight of a flexible copolymer containing alternating covalently bonded blocks of poly(butylene terephthalate) and poly(1,4-butylene ether).