Polyvinyl alcohol film and polarizing film

Details Polyvinyl alcohol film and polarizing film Polyvinyl alcohol film and polarizing film

2007-02-27

2007-02-27

Lipman, Bernard (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S388000, C524S555000, C524S557000, C525S059000, C525S060000, C525S061000

Reexamination Certificate

active

11118474

ABSTRACT:
The invention is a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of α-olefin units having at most 4 carbon atoms. The polyvinyl alcohol film gives polarizing films and polarizer which are resistant to water and have good polarizing properties and which are free from a problem of irregular coloration.

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