a cyclohexanedimethanol with an ethylene glycol with a terephthalic acid or with a combination of terephthalic acid and isophthalic acid also suitable are polyesters derived from the condensation of a cyclohexanedimethanol with an ethylene glycol with a 1 4 cyclohexanedicarboxylic acid suitable resins include poly alkylene dicarboxylates especially poly ethylene terephthalate pet poly 1 4 butylene terephthalate pbt poly trimethylene terephthalate ptt poly ethylene naphthalate pen poly butylenes naphthalate pbn poly cyclohexanedimethanol terephthalate pct poly cyclohexanedimethanol co ethylene terephthalate petg or pctg and poly 1 4 cyclohexanedimethyl 1 4 cyclohexanedicarboxylate pccd u s pat nos 2 465 319 3 953 394 and 3 047 539 u2014 all incorporated herein by reference disclose suitable methods for preparing such resins the suitable polyalkylene terephthalates are characterized by an intrinsic viscosity of at least 0 2 and preferably about at least 0 4 deciliter gram as measured by the relative viscosity of an 8 solution in orthochlorophenol at about 25 u00b0 c the upper limit is not critical but it generally does not exceed about 2 5 deciliters gram especially preferred polyalkylene terephthalates are those with an intrinsic viscosity in the range of 0 4 to 1 3 deciliter gram the alkylene units of the polyalkylene terephthalates which are suitable for use in the present invention contain from 2 to 5 preferably 2 to 4 carbon atoms polybutylene terephthalate prepared from 1 4 butanediol and polyethylene terephthalate are the preferred polyalkylene tetraphthalates for use in the present invention other suitable polyalkylene terephthalates include polypropylene terephthalate polyisobutylene terephthalate polypentyl terephthalate polyisopentyl terephthalate and polyneopentyl terephthalate the alkylene units may be straight chains or branched chains component c of the inventive composition is clay the particle size of which is in the order of nanometers herein nanoclay nanoclay is known.