Novel alloy compositions and products

An improved elastomeric film forming composition comprising at least an equal proportion by weight of a block copolymer component and a copolyester component, wherein the block copolymer is an A--B--A or A--B block copolymer or a mixture thereof in which A represents an alkenylarene polymer block and B represents a polymer block of a conjugated lower aliphatic diene, and wherein the copolyester is a polymeric ester of at least two different ester units, each unit being a condensation product of a dicarboxylic acid and an aliphatic diol, said ester units being represented by the formulas ##STR3## wherein X and X' are nuclei of dicarboxylic acids and Y and Y' are nuclei of aliphatic diols, and wherein each ester unit and is characterized by having a thermal softening temperature below about 225.degree. C.

An improved plastic film forming composition comprising a major proportion by weight of a copolyester component and a minor proportion of an elastomeric block copolymer component, wherein the copolyester is a polymeric ester of at least two different ester units, each unit being a condensation product of a dicarboxylic acid and an aliphatic diol, said ester units being represented by the formulas ##STR4## wherein X and X' are nuclei of dicarboxylic acids and Y and Y' are nuclei of aliphatic diols, and wherein each ester unit and is characterized by having a thermal softening temperature below about 225.degree. C., and the block copolymer consists essentially of an A--B--A or A--B block copolymer or a mixture thereof in which A represents an alkenylarene polymer block and B represents a polymer block of a conjugated lower aliphatic diene.

An elastomeric film or sheet prepared from a composition comprising at least an equal proportion by weight of a block copolymer component and a copolyester component, wherein the block copolymer is an A--B--A or A--B block copolymer or a mixture thereof in which A represents an alkenylarene polymer block and B represents a polymer block of a conjugated lower aliphatic diene, and wherein the copolyester is a polymeric ester of at least two different ester units, each ester unit being a condensation product of a dicarboxylic acid and an aliphatic diol, said ester units being represented by the formulas ##STR5## wherein X and X' are nuclei of dicarboxylic acids and Y and Y' are nuclei of aliphatic diols, and wherein each ester unit and is characterized by having a thermal softening temperature below about 225.degree. C.

An improved plastic film or sheet prepared from a composition comprising a major proportion by weight of a copolyester component and a minor proportion of an elastomeric block copolymer component, wherein the copolyester is a polymeric ester of at least two different ester units, each unit being a condensation product of a dicarboxylic acid and an aliphatic diol said ester units being represented by the formulas ##STR6## wherein X and X' are nuclei of dicarboxylic acids and Y and Y' are nuclei of aliphatic diols, and wherein each ester unit and is characterized by having a thermal softening temperature below about 225.degree. C., and the block copolymer consists essentially of an A--B--A or A--B block copolymer or a mixture thereof in which A represents an alkenylarene polymer block and B represents a polymer block of a conjugated lower aliphatic diene.