Aqueous casting solutions for the production of light-polarizing

Details Aqueous casting solutions for the production of light-polarizing Aqueous casting solutions for the production of light-polarizing

1989-12-11

1992-03-03

Schofer, Joseph L.

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...

524557, 524388, C08K 505

Patent

active

050934015

ABSTRACT:
Casting solutions for the production of light-polarizing films or sheets contain, relative to the sum of weights (A)+(B)+(C)+(D)=100% by weight, (A) 30-95% by weight, preferably 40-75% by weight, of water, (B) 1-40% by weight, preferably 4-30% by weight, of vinyl, alcohol polymer, (C) 0.01-5% by weight, preferably 0.02-2% by weight, of the dichroic dyestuff, (D) 0.1-75% by weight, preferably 0.5-50% by weight, of one or several organic compounds from the group consisting of aliphatic polyols having 2-6 C atoms, aliphatic ether polyols having 2-6 C atoms, C.sub.1 -C.sub.4 -alkyl ethers of aliphatic polyols having 2-6 C atoms, aliphatic aminoalcohols having 2-4 C atoms, amides of aliphatic C.sub.1 -C.sub.4 -carboxylic acids, and, if desired, a C.sub.1 -C.sub.4 -monoalcohol, and, if desired (E) further additives customary for casting solutions, for example stabilizers, and wherein if using glycerol solely, the weight ratio of glycerol: vinylalcohol polymer is about 0.2-1:1, preferably 0.3-0.5:1.

REFERENCES:
patent: 3997489 (1976-12-01), Coker
patent: 4215169 (1980-07-01), Wysong
Database Chemical Abstracts, (HOST:STN), 1988, Ref. No. 112(12): 100242e, Columbus, Ohio, U.S.: and PL-A-145 151 (Politechnika Warswawska) 31-08-1988.

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