Cyclohexylene dimethylene terephthalate (PCT) or copolyester obtained from terephthalic acid, 1,4-cyclohexanedimethanol and ethylene glycol, which is obtained by reacting ethylene with vinyl acetate and alkyl acrylate At a low temperature due to the presence of an ethylene copolymer containing at least 5 mole percent of polymerizable free radical comonomers selected from the group consisting of ethylene,
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