Miles Inc.

Bayer Aktiengesellschaft

Bayer Corporation

Mobay Corporation

Dittmar K Nerger

Rolf Wehrmann

Douglas A Wicks

Robert J Kumpf

Harald Pielartzik

Heinrich-Christian Schopper

Rick L Archey

Gary W Munko

Randall A Rodenhouse

Block copolymers represented by the formula ##STR1## are formed by contacting an ester group containing poly(aryl ether ketone) composed of the recurring units ##STR2## with a liquid crystalline polyester represented by the formula ##STR3## in which R.sub.1, R.sub.2 X.sub.2, X, Z, E.sup.1, E.sup.2 E.sup.5, w, x, y, z a, b and n each represent specified groups or values under conditions such that a transesterification reaction will occur.

Poly(arylether)/liquid crystalline polyester block copolymers and a

A process for preparing a block oligocarbonate is disclosed. The oligocarbonate conforms to ##STR1## where R denotes hydrogen or ##STR2## and where A denotes an aromatic carbonate structure conforming to ##STR3## where Ar is an aromatic radical, n is 2-6 and where B is the residue of an aliphatic polyol is disclosed. In the process a high molecular weight aromatic polycarbonate is reacted, in the melt and in the presence of a catalyst, with an aliphatic polyol. The block oligocarbonate is useful as a reactant in a process for the preparation of copolymers.

Process for the preparation of a block oligocarbonate

Prepolymer polyols containing mesogenic moieties useful as reactants for the preparation of resinous materials are disclosed. Synthesized by condensing a polyether polyol with bifunctional mesogenic diacids, or diesters, the compounds of the invention are characterized by their reasonably low melt temperature which renders them suitable as additive materials in polymeric molding compositions and as precursors for the preparation of resinous materials. The liquid crystalline properties of the prepolymers of the invention were found to depend on the type and molecular weight of the glycols and on the molar ratio between the glycols and the mesogenic reactant.

Prepolymeric polyols containing mesogenic units

A block copolymer represented by the formula ##STR1## are formed by contracting an ester group containing poly(aryl ether) composed of the recurring units ##STR2## with a polyarylcarbonate composed of the recurring units ##STR3## in which B, Z, E.sup.5, E.sup.1, E.sup.2 x, y, n and p represent specified groups or values under conditions such that ester/carbonate interchange reactions will occur.

Polyether/polycarbonate block copolymers and a process for their

A dihalobenzenoid compound is reacted with a dihydric phenol containing an azo group in the presence of a base, an organic solvent and an azeotrope former. Dihydric phenols which do not contain azo groups may also be included in the reaction mixture. This reaction is generally carried out at a temperature of from about 20.degree. to about 250.degree. C. under an inert atmosphere. The polyether obtained is represented by the formula

Aromatic polyethers containing azo groups

Coated substrates having an ultrathin, single-layer or multilayer coating of organic polymer material have been found, in which coated substrates the polymer used is a polyester of the structure ##STR1## wherein A is the skeleton of an aliphatic, araliphatic or aromatic diol,

Coated substrates having an ultrathin, single-layer or multilayer

Coated supports with ultra-thin, single-layer or multi-layer coating of organic polymer material have been found, in which, as polymer, polyurethanes of the structure ##STR1## are used in which A is the skeleton of an aliphatic, araliphatic or aromatic diol,

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Pittsburgh, PA, United States of America

Dittmar K Nerger