Patent ID: 6180749
Filing Date: 2001-01-30
Classification: C08G,C08J

Abstract:
A heavy gauge clear glass sheet composed of copolyester resins having more than 83% of visible light transmittance and lower than 5% of haze, prepared from a copolymer polymerized with an acid component consisting of (i) a terephthalate moiety and a 2,6-naphthalene dicarboxylate moiety or (ii) a terephthalate moiety, a 2,6-naphthalene dicarboxylate moiety and an isophthalate moiety with glycol component comprising (i) ethyleneglycol (EG) itself, or (ii) the mixture of ethyleneglycol (EG) and 1,4-cyclohexandimethanol (CHDM), the aforesaid copolymer being (i) stable firmly so as not to decompose when melted; and (ii) having a high melt viscosity, such that when cooling there is no crystallization to deteriorate transparency, and the resins are of low crystallinity.