Patent ID: 6472031
Filing Date: 2002-10-29
Classification: B29C,B29L,C09K,Y10S,Y10T

Abstract:
A substrate for liquid crystal display comprising a high quality plastic sheet having an electronic component disposed on at least one side of the sheet; wherein the plastic sheet is produced by the process comprising the steps of:a) providing molten plastic resin; b) directing the molten plastic resin to an overflow die having an inlet and an outlet; c) shaping the molten plastic resin into a molten web using said overflow die; d) guiding said molten web away from said overflow die; and e) cooling said molten web to form a solid sheet; wherein the resin is a polycarbonate or polycarbonate-polyester comprising one or more bisphenols selected from the group consisting of bis(4-hydroxyphenyl) alkanes and cycloalkanes; bis(3-substituted4-hydroxyphenyl) alkyl-cycloalkanes; bis(3,5-disubstituted-4-hydroxyphenyl) alkylcycloalkanes; 2,2-bis(3-methyl4-hydroxyphenyl)propane; 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane; 1,1-bis(4-hydroxyphenyl)cyclohexane; 2,2-bis(3-phenyl-4-hydroxyphenyl)propane; 2,2-bis(3-isopropyl-4-hydroxyphenyl)propane; 2,2-bis(4-hydroxyphenyl)butane; 9,9-bis(4-hydroxyphenyl)fluorene; 9,9-bis(4-hydroxy-3-methylphenyl)fluorene; 1,1-bis(4-hydroxyphenyl)-3,3-dimethylcyclohexane; 1,1-bis(3,5-dimethyl4-hydroxyphenyl)-3,3,5-trimethylcyclohexane; 1,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane; 1, 1-bis(4-hydroxyphenyl)-1-phenylethane; 4,4â€²-dihydroxy-tetraphenylmethane; 2,2-bis(4-hydroxyphenyl) propane; 6,6â€²-dihydroxy-3,3,3â€²,3â€²-tetramethyl-1,1â€²-spiro(bis)indane, and mixtures thereof; and provided that when the plastic resin is a polycarbonate, it does not contain as bisphenol components (1) 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane; (2) a mixture of 2,2-bis(4-hydroxyphenyl)propane and 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane; a blend of (1) and (2); or a blend of (1) or (2) with a second polycarbonate containing as a bisphenol component 2,2-bis(4-hydroxyphenyl)propane.