Highly effective polarizers

Details Highly effective polarizers Highly effective polarizers

1989-12-06

1991-09-24

Thomas, Alexander S.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428910, 359490, G02B 530, B32B 2730

Patent

active

050512862

ABSTRACT:
Highly effective polarizers are described having a degree of polarization P of at least 95% and a dichroic ratio Q.sub.E =quotient of the extinction in the blocking position to the extinction in the transmitting position, of 10 or more over almost the whole wavelength range of visible light between 400 and 800 nm, the said polarizers comprising polymer products containing polyacetylene, in whose matrix 70 to 90% of all comonomer units are vinyl alcohol units. The polarizers are used in the form of films with a stretch ratio ##EQU1## (1=length after stretching, l.sub.o =length before stretching) of more than 300%. They can be produced by polymerization of acetylene in the solution of a copolymer in which 70 to 90% of all comonomer units are vinyl alcohol units, in the presence of a nickel catalyst.

REFERENCES:
patent: 4893911 (1990-01-01), Starzewski et al.

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