Raychem Limited

Stephen S Moore

Paul Becker

Viktors Jansons

Ronald James Mosso

Robert H Reamey

Patrick J Horner

Larry M Edwards

A Brian Macknick

John B Mazzanti

Hundi Panduranga Kamath

Klaus J Dahl

Philip J Jones

Lawrence J White

Mark F Wartenberg

Heinrich C Gors

An active matrix liquid crystal display having improved performance properties is made using an encapsulated liquid crystal structure comprising a containment medium having dispersed therein a liquid crystal composition having an average dielectric constant greater than about 6 and other specified characteristics.

Active matrix liquid crystal display with average dielectric constant

Poly(arylene ether ketones) are prepared by a Friedel-Crafts polymerization wherein a gelled reaction mixture is produced, by permitting the polymerization to proceed in a first reactor until substantial partial polymerization has occurred, but before substantial gelation of the reaction mixture; transferring the partially polymerized reaction mixture into a piston-equipped second reactor; permitting polymerization to continue in the second reactor until a gelled, polymerized reaction mixture has been obtained; and discharging the polymerized reaction mixture from the second reactor by stroking the piston.

Preparation of poly(arylene ether ketones) by sequential oligomerization

Novel copoly(arylene ether ketones) having a biphenylene-4,4'-dicarbonyl group in their backbone, comprising

Poly(arylene ether ketones) having biphenylene-4,4'-dicarbonyl groups

A method of preparing a poly(arylene ether ketone) by a Friedel-Crafts polymerization wherein a gelled reaction mixture is produced, comprising the steps of:

A method of preparing a poly(arylene ether ketone) having a repeat unit ##STR1## comprising polymerizing a monomer system comprising (I) a monomer of the formula ##STR2## and (II) a monomer of the formula ##STR3## wherein R.sup.1 is p-phenylene, m-phenylene, or 4,4'-biphenylene;

Preparation of poly(arylene ether ketones)

This invention relates to novel copolymers derived from diphenyl ether, terephthalic acid derivative and a third monomer of the formula ##STR1## where n=1 or 2. The copolymers can be prepared by Friedel-Crafts polymerization. Preferred copolymers are derived from diphenyl ether, terephthaloyl chloride, and 1,4-diphenoxybenzene.

Aryl ether ketone copolymers

The preparation of poly(arylene ether ketones) by Friedel-Crafts polymerization, in the presence of a Lewis acid catalyst and a diluent, is conducted under conditions in which the polymer and/or its complex with the catalyst is suspended in the diluent during at least part of the polyreaction mixture if desired. The dispersant may be a polymer or an organic compound containing at least eight carbon atoms and is preferably a Lewis base. The dispersant preferably contains at least one molecular segment substantially compatible with the poly(arylene ether ketone) or its complex with the Lewis acid and substantially incompatible with the diluent and at least one molecular segment substantially compatible with the diluent and substantially incompatible with the poly(arylene ether ketone) or its complex with the Lewis acid.

Growing community of inventors

Redwood City, CA, United States of America

Stephen S Moore