Abstract: A composition comprises a blend of (a) a first crystalline fluoroplastic which is an ethylene-tetrafluoroethylene copolymer, in an amount between 30 and 70 weight %; (b) a second crystalline fluoroplastic which is a terpolymer of tetrafluoroethylene, hexafluoropropylene, and vinylidene fluoride, in an amount between 30 and 65 weight %; and (c) a fluorinated thermoplastic elastomer which is a block copolymer having at least one elastomeric segment comprising tetrafluoroethylene, vinylidene fluoride, and hexafluoropropylene repeat units in a mole ratio 45-90:5-50:0-35 and at least one nonelastomeric segment comprising tetrafluoroethylene and ethylene repeat units, in an amount between 5 and 25 weight %. The fluorinated thermoplastic elastomer acts as a compatibilizer for the two fluoroplastics. The composition exhibits improved flexibility, tensile strength, and/or elongation.

Abstract: Novel compositions comprise a blend of(A) a thermoplastic polymer selected from copolymers of ethylene and tetrafluoroethylene, and thermoplastic vinylidene fluoride polymers; and(B) a thermoplastic elastomer having (i) at least one elastomeric segment comprising (a) vinylidene fluoride, hexa- or pentafluoropropylene, and tetrafluoroethylene repeating units in a mole ratio of 45-90:5-50:0-35 or (b) perfluoro(alkyl vinyl ether), tetrafluoroethylene and vinylidene fluoride repeating units in a mole ratio of 15-75:0-85:0-85; and (ii) at least one nonelastomeric segment selected from segments comprising ethylene and tetrafluoroethylene repeating units in a mole ratio of 40-60:60-40, and segments comprising vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene repeating units in a mole ratio of 0-100:0-50:0-100,with the proviso that if the thermoplastic polymer is a vinylidene fluoride polymer, the blend is crosslinked.

Abstract: Novel copolymers are prepared by the interaction of a melt mix of a high molecular weight or low molecular weight bisphenol A polycarbonate polymer and a high molecular weight diprimary dialcohol polyester polymer such as polyethylene terephthalate polymer. The resulting copolymers are transparent, relatively tough and are useful as glazing materials or molding compounds and are capable of maintaining dimensional stability at temperatures approaching their glass transition temperature.

Abstract: Novel copolymers are prepared by the interaction of low or high molecular weight polyarylates, such as bisphenol A-isophthalate-terephthalate polyarylates, or bisphenol A-isophthalate-terephthalate-carbonate polyarylates and a high molecular weight diprimary dialcohol polyester polymer, such as polyethylene terephthalate polymer. The resulting copolymers are transparent and tough. They maintain their dimensional stability over a wide range of temperature from 75.degree.-175.degree. C., are soluble in chlorinated solvents, and have one glass transition point.

Abstract: Novel copolymers are prepared by the interaction of a melt mix of a high molecular weight or low molecular weight bisphenol A polycarbonate polymer and a high molecular weight diprimary dialcohol polyester polymer such as polyethylene terephthalate polymer. The resulting copolymers are transparent, relatively tough and are useful as glazing materials or molding compounds and are capable of maintaining dimensional stability at temperatures approaching their glass transition temperature.

Abstract: Novel copolymers are prepared by the interaction of low or high molecular weight polyarylates, such as bisphenol A-isophthalate-terephthalate polyarylates, or bisphenol A-isophthalate-terephthalate-carbonate polyarylates and a high molecular weight diprimary dialcohol polyester polymer, such as polyethylene terephthalate polymer. The resulting copolymers are transparent and tough. They maintain their dimensional stability over a wide range of temperature from 75.degree.-175.degree. C., are soluble in chlorinated solvents, and have one glass transition point.