Polyester resin, polyester resin composition, and sheet,...

Details Polyester resin, polyester resin composition, and sheet,... Polyester resin, polyester resin composition, and sheet,...

2006-05-23

2006-05-23

Acquah, Samuel A. (Department: 1711)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C528S307000, C525S439000, C428S038000, C428S221000

Reexamination Certificate

active

07048978

ABSTRACT:
To provide a polyester resin particularly useful in application to optical films, etc.A polyester resin which is an alicyclic polyester comprising dicarboxylic acid units and diol units, characterized by the following (1) to (4):(1) the dicarboxylic acid units are composed mainly of 1,4-cyclohexanedicarboxylic acid units,(2) the diol units are composed mainly of 1,4-cyclohexanedimethanol units,(3) the ratio of alkyl ester terminals to all terminals of the polyester is at most 5 mol %, and(4) the light transmittance of a molded plate of the resin having a thickness of 2 mm is at least 87%.

REFERENCES:
patent: 6458913 (2002-10-01), Honigfort et al.
patent: 6465102 (2002-10-01), Honigfort et al.
patent: 902052 (1999-03-01), None
patent: EP 0 902 052 (1999-03-01), None

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