Dow Global Technolgoies LLC

The Dow Chemical Company

Rohm & Haas Electronic Materials LLC

John W Lyons

William L Winniford

Matthew D Miller

Alexander Willem deGroot

Freddy A Van Damme

Paul Joseph Popa

Rongjuan Cong

Abhishek Roy

Garo Khanarian

Weijun Zhou

Allen S Bulick

David M Meunier

Randy J Pell

Theodore M Stokich, Jr

Binghe Gu

John Anderson Roper, Iii

Jerry L Hahnfeld

John Ell

Stewart P Wood

James H Sedon

Peter D Aldrich

Jason Q Niu

Elizabeth E Benedetto

Freddy Van Damme

Theodore M Stokich

Craig H Silvis

Matthew Miller

Theodore Stokich

The invention provides methods for chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a liquid chromatography stationary phase, the liquid chromatography stationary phase comprising graphitic carbon. The invention also provides an apparatus for polyolefin polymer chromatography, comprising a liquid chromatography stationary phase, the liquid chromatography stationary phase comprising graphitic carbon and at least one inert filler.

Chromatography of polyolefin polymers

A method and apparatus for chromatography of a polyolefin polymer by flowing a solution of the polyolefin polymer through liquid flowing through a graphitic carbon liquid chromatography stationary phase. The method can be used to determine the monomer to comonomer ratio of a polyolefin copolymer such as a copolymer of ethylene and 1-octene or a copolymer of propylene and ethylene.

A curable liquid polysiloxane/TiOcomposite for use as a light emitting diode encapsulant is provided, comprising: a polysiloxane with TiOdomains having an average domain size of less than 5 nm, wherein the curable liquid polysiloxane/TiOcomposite contains 20 to 60 mol % TiO(based on total solids); wherein the curable liquid polysiloxane/TiOcomposite exhibits a refractive index of &#x3e;1.61 to 1.7 and wherein the curable liquid polysiloxane/TiOcomposite is a liquid at room temperature and atmospheric pressure. Also provided is a light emitting diode manufacturing assembly.

Curable liquid composite light emitting diode encapsulant

A method of making a light emitting diode (LED) having an optical element is provided, comprising: providing a curable liquid polysiloxane/TiOcomposite, which exhibits a refractive index of &#x3e;1.61 to 1.7 and which is a liquid at room temperature and atmospheric pressure; providing a semiconductor light emitting diode die having a face, wherein the semiconductor light emitting diode die emits light through the face; contacting the semiconductor light emitting diode die with the curable liquid polysiloxane/TiOcomposite; and, curing the curable liquid polysiloxane/TiOcomposite to form an optical element; wherein at least a portion of the optical element is adjacent to the face.

Light emitting diode manufacturing method

A method for multi-dimensional chromatography of a polyolefin polymer, comprising introducing a solution of the polyolefin polymer into a liquid flowing through a first liquid chromatography stationary phase or a field flow fractionation device and subsequently flowing the solution through a second liquid chromatography stationary phase, the second liquid chromatography stationary phase comprising graphitic carbon, the polyolefin polymer emerging from the liquid chromatography stationary phase with a retention factor greater than zero.

Chromotography of polyolefin polymers

An apparatus and method are disclosed which allow the size of a particle suspended in a medium to be determined virtually independent of the materials'refractive index. The apparatus includes a light source, a sample holder, a detector and a spatial filter. The method of the invention comprises passing the medium containing the particle through a beam of collimated light so that the light which contacts the particle will be scattered; deterring the light which was scattered by the particles from being detected, detecting the light which was not scattered by the particle; and determining the size of the particle from the decrease in the light intensity incident on the detector.

Apparatus and method for using light scattering to determine the size of

Flow rates of multi-phase streams may be determined by use of a fiber optic probe which establishes an illuminated sensing zone of finite dimensions. The probe collects light backscattered from the zone, the collected light being converted by a photodiode to voltage waveforms. Flow rate is determined by sampling voltage waveforms at discrete points in time, the sample being digitized and the digits being autocorrelated for such discrete points.

Method and apparatus for fiber optic backscattered light measurement to

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Midland, MI, United States of America

John W Lyons