Process for producing ester-substituted polyvinyl alcohol and th

Details Process for producing ester-substituted polyvinyl alcohol and th Process for producing ester-substituted polyvinyl alcohol and th

1997-03-26

1998-11-03

Mosley, Terressa

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

528392, C08F 2000

Patent

active

058309535

ABSTRACT:
A process for producing ester-substituted polyvinyl alcohol from a compound having a carboxyl group and polyvinyl alcohol, which comprises converting the compound having a carboxyl group to an active derivative thereof and reacting the active carboxylic acid derivative with polyvinyl alcohol in the presence of a base the conjugate acid of which has a pKa of 11 or more; and a thin film, provided on a transparent substrate, which comprises a film of the ester-substituted polyvinyl alcohol as a liquid crystal alignment layer and an optically anisotropic layer containing a discotic liquid crystal compound which has at least one substituent capable of forming a new bond intermolecularly or intramolecularly and which is capable of forming a discotic nematic phase.

REFERENCES:
Seki et al., Thin Solid Films, 179 (Apr., 1989), pp. 77-83, "Formation and Langmuir-Blodgett Deposition of Monolayers of Poly(Vinyl Alcohols)s Bearing Azobenzene Side-Shains of Varied Spacer Length".
Seki et al., Langmuir 1993, 9, pp. 211-218, `"Command Surfaces` of Langmuir-Blodgett Films. Photoregulations of Liquid Crystal Alignment by Molecularly Tailored Surface Azobenzene Layers."
Seki et al., Polymer Communications, (Apr., 1989), vol. 30, pp. 108-110, "Formation and Langmuir-Blodgett deposition of monolayers of poly(vinyl alcohol) having azobenzene side chains".
Kobunshi Jikkengaku Koza, vol. 12, Ch. 4, (1957) (and English translation).
Kobunshi Jikkengaku, vol. 6, Ch. 2 (1978) (and English translation).

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