Hoechst Celanese Corporation

Hoecast Celanese Corporation

United States of America As Represented by the Secretary of the Air Force

Celanese Gmbh

James B Stamatoff

Hyun-Nam Yoon

Ronald N DeMartino

Alan Buckley

Thomas M Leslie

Dagobert E Stuetz

Tessie M Che

Donald R Ulrich

M Ishaq Haider

Joseph D Menczel

Barbara J Long

James E Kuder

Michael Bayer

George L Lundberg

Subhash Makhija

Anthony F Garito

Garo Khanarian

Chia-Chi Teng

Hyun Nam Yoon

Hong-Tai Man

Kophu Chiang

David R Haas

Ronald N De Martino

Chia C Teng

Lakshaman Mahinda Walpita

Donald Raskin

Doanld R Ulrich

A thermally expandable wax composition and its use in polymer-based actuators is disclosed and claimed. The compositions are wax-based and include conductive filler as well as a viscosity modifier to stabilize the composition against segregation. Optionally included are thermoxidative stabilizers.

Thermally expandable, viscosity modified wax compositions and method of

This invention discloses a thermally expandable composition for use in actuators. The composition contains about 10-50 volume percent hollow glass spheres in a wax or a polymer. The spheres contain a conducting coating affixed thereon. During use in an actuator, the composition is heated to melt the wax or polymer, when the density of the spheres substantially match the density of the melt, thereby substantially eliminating phase separation. The high thermal conductivity of the composition increases the speed of heat transfer out of the composition during the cooling cycles.

Electronically and thermally conducting compositions for actuators

Blends of thermotropic liquid crystalline polymers and isotropic melt-processable polymers are made by extruding a molten stream of either a thermotropic liquid crystalline polymer or an isotropic polymer through a heated mixing zone and feeding the other of the two polymers into the stream of the first polymer in the mixing zone. The polymers are mixed under shearing conditions for a time sufficient to yield a uniform blend. Blends made according to this method exhibit improved properties in comparison with blends obtained by feeding the two polymers simultaneously into a heated mixing zone.

Method for making blends of liquid crystalline and isotropic polymers

A low dielectric material made of a liquid crystal polymer, polytetrafluoroethylene, and hollow glass spheres. This material is a relatively low cost, low dielectric blend having good physical strength and chemical and temperature resistance.

Low dielectric materials

This invention provides polymeric thin film optical waveguide media which exhibit nonlinear optical response, and which have utility as an optical waveguide component in all-optical and electrooptical light switch and light modulator devices. An invention waveguide medium consists of a thin film of an amorphous organic polymer as illustrated by the following structure: ##STR1##

Polymeric thin film waveguide media

A system incorporating a pair of Mach-Zehnder modulators (164,166) for performing amplitude modulation of an optical carrier is disclosed. Each of the modulators is designed to suppress even order distortion products and develop third order distortion products of opposite sign and equal magnitude. The outputs of the two modulators are combined in a directional coupler (155) resulting in substantially suppressing second through fourth order distortion products.

Cable system incorporating highly linear optical modulator

A method is disclosed which uses the Langmuir-Blodgett method to coat a substrate with multiple monomolecular single layers by immersing the substrate through a first layer of a first enclosure of a tank having first and second enclosures on a common subphase, and then withdrawing the substrate through a second layer in the second enclosure. The steps are repeatable to provide as many different single layers as required.

Method of making asymmetric Langmuir-Blodgett films

This invention provides novel side chain liquid crystalline polymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in electrooptic light modulator devices. An invention side chain liquid crystalline polymer is illustrated by poly[6-(4-nitrobiphenyloxy)hexyl methacrylate]: ##STR1##

Side chain liquid crystalline polymers exhibiting nonlinear optical

This invention provides an optical medium which consists of a composite of a homogeneous inorganic oxide glass monolith with a microporous structure containing a liquid crystalline component. In one embodiment this invention provides a sol-gel process for producing a composite of a transparent homogeneous microporous inorganic oxide glass monolith and a liquid crystalline compound.

Process for producing liquid crystalline composites

This invention provides an optical medium which consists of a composite of a homogeneous inorganic oxide glass monolith with a microporous structure containing a liquid crystalline polymer component. In one embodiment this invention provides a sole-gel process for producing a composite of a transparent homogeneous microporous inorganic oxide glass monolith and a liquid crystalline polymer.

Process for preparing liquid crystalline polymer composites

This invention provides an optical medium which consists of a composite of a homogeneous inorganic oxide glass monolith with a microporous structure containing a liquid crystalline polymer component. In one embodient this invention provides a sol-gel process for producing a composite of a transparent homogeneous microporous inorganic oxide glass monolith and a liquid crystalline polymer.

Electrooptic device having a liquid crystalline polymer composite

In one embodiment this invention provides a polarization-insensitive interferometric waveguide electrooptic modulator device. In a Mach-Zehnder type of waveguide geometry, one of the divergent optical paths has two sets of electrodes, which apply a horizontal electric field and a vertical electric field, respectively, to a nonlinear optically responsive polymeric medium in the optical path. The polymer medium section between each set of electrodes has a noncentrosymmetric molecular orientation parallel to the respective electric fields.

Growing community of inventors

Westfield, NJ, United States of America

James B Stamatoff