abstract |
COPOLYESTERS AND THEIR APPLICATIONS. THESE COPOLYESTERS OBTAINED FROM ISOPHTHALIC OR TEREPHTHALIC ACIDS, ETHYLENEGLYCOL, 1,3BIS (2-HYDROXY-ETHOXY) BENZENE, AND POSSIBLY OTHER DIOLS, HAVE AO AND CO PERMEABILITIES MOST REACTIVE TO CAUSE 1 , 3BIS (2-HYDROXY-ETHOXY-ETHOXY) BENZENE. USE OF THESE COPOLYESTERS TO MAKE HOLLOW RECEPTACLES, SHEETS AND FILMS ALSO CLAIMED. |