James T Rabe

US Patent:

7737082, Jun 15, 2010

Filed:

Aug 25, 2005

Appl. No.:

11/659988

Inventors:

James Alan Rabe - Midland MI, US
Sefa Yilmaz - Saginaw MI, US
Patrick Weyburne - Midland MI, US

International Classification:

B01J 20/02
B01J 20/10

US Classification:

502400, 502402, 502416, 502417

Abstract:

A siloxane composition, comprising from 70 to 99 parts by weight of a solid particulate having a median particle size of from 0. 1 to 3000 μm and from 1 to 30 parts by weight of a binder having a median particle size of from 5 to 250 μm, wherein the composition is a powder and the binder comprises a siloxane resin having the formula: (RSiO)(RSiO)(RSiO)(SiO), wherein each Ris independently selected from hydrogen, hydrocarbyl, substituted hydrocarbyl, —O═NRR, —OR, —O—R—OR, and an epoxy-substituted organic group, wherein Ris Cto Chydrocarbyl, Ris Ror —H, Ris hydrocarbylene, w+x+y+z=1, y/(w+x+y+z) is at least 0. 67, and the siloxane resin has a softening point of from 30 to 115 C. ; an agglomerate, and a method preparing the agglomerate.

US Patent:

20070202029, Aug 30, 2007

Filed:

Aug 27, 2004

Appl. No.:

10/580945

Inventors:

Gary Burns - Midland MI, US
James Rabe - Midland MI, US
Sefa Yilmaz - Saginaw MI, US

International Classification:

C01B 33/00

US Classification:

423324000

Abstract:

Metallurgical grade silicon is purified by removing metallic impurities and non-metallic impurities. The object is to produce a silicon species that is suitable for use as solar grade silicon. The process involves grinding metallurgical grade silicon containing metallic and non-metallic impurities to a silicon powder consisting of particles of silicon having a diameter of less than about 5 millimeter. While maintaining the ground silicon powder in the solid state, the ground silicon powder is heated to a temperature less than the melting point of silicon (1410 C.) under reduced pressure. The heated ground silicon powder is maintained at that temperature for a period of time sufficient to enable at least one metallic or non-metallic impurity to be removed from the metallurgical grade silicon.

US Patent:

52387429, Aug 24, 1993

Filed:

Dec 16, 1991

Appl. No.:

7/808301

Inventors:

Harvey A. Freeman - Sanford MI
Neal R. Langley - Midland MI
Chi-Tang Li - Midland MI
Jonathan Lipowitz - Midland MI
James A. Rabe - Midland MI

Assignee:

Dow Corning Corporation - Midland MI

International Classification:

C01B 3136
C07F 708

US Classification:

428367

Abstract:

The present invention relates to ceramic fibers of the Si-C-N-O series with a diameter less than about 20 micrometers. It has been unexpectedly found that the thermal stability of these fibers can be increased by minimizing the impurity content, primarily the content of metals or metallic compounds. Such fibers with low levels of contaminants retain greater than about 60 percent of their initial tensile strength when subjected to temperatures of 1300. degree. -1400. degree. C. for at least 30 minutes in a non-oxidative environment.

US Patent:

45729182, Feb 25, 1986

Filed:

Aug 19, 1985

Appl. No.:

6/766621

Inventors:

Chi-Long Lee - Midland MI
James A. Rabe - Midland MI

Assignee:

Dow Corning Corporation - Midland MI

International Classification:

C08J 908
C08J 910
C08J 912

US Classification:

521 91

Abstract:

Polyorganosiloxane foams exhibiting a desirable combination of low density, an average cell size below 4 mm. and an average cell concentration greater than 4 per linear centimeter are obtained by dispensing oxygen curable mercaptoorganosiloxane compositions containing a cobaltocene catalyst, a dispersed liquid or gaseous blowing agent and, as a foam stabilizer, a resinous organosiloxane copolymer comprising trimethylsiloxy units, SiO. sub. 4/2 units and specified fluorine-containing organosiloxane units. The polymer portion of the composition includes at least one polyorganosiloxane containing at least 20 mole percent of dimethylsiloxane units and an average of more than 2 mercaptoalkyl or mercaptoalkylene groups per molecule.

US Patent:

49216570, May 1, 1990

Filed:

Nov 13, 1987

Appl. No.:

7/120108

Inventors:

James A. Rabe - Midland MI
Jonathan Lipowitz - Midland MI
Richard E. Jones - Midland MI

Assignee:

Dow Corning Corporation - Midland MI

International Classification:

B28B 126

US Classification:

264 86

Abstract:

The elastic modulus and density of an amorphous, ceramic article derived from a resinous organosilicon polymer and having a composition consisting essentially of silicon, nitrogen and/or carbon are increased while substantially maintaining or improving tensile strength by heat treating the ceramic article at an elevated temperature under superatmospheric nitrogen pressure to increase its density while avoiding crystallization. During heat treatment, at least some of the conditions of time, temperature, heating rate, cooling rate, pressure and atmosphere are controlled to minimize erosion of the article which could otherwise occur due to the loss to the surrounding atmosphere, as a gas or gaseous component, of at least one of nitrogen, silicon and carbon. The heat treated, ceramic article is amorphous and non-crystalline and has a density substantially greater than 2. 5 g/cc together with desirable values of tensile strength and elastic modulus.

US Patent:

51358093, Aug 4, 1992

Filed:

Sep 27, 1989

Appl. No.:

7/577165

Inventors:

James A. Rabe - Midland MI
Jonathan Lipowitz - Midland MI
Richard E. Jones - Midland MI

Assignee:

Dow Corning Corporation - Midland MI

International Classification:

C04B 3552

US Classification:

428367

Abstract:

The elastic modulus and density of an amorphous, ceramic article derived from a resinous organosilicon polymer and having a composition consisting essentially of silicon, nitrogen and/or carbon are increased while substantially maintaining or improving tensile strength by heat treating the ceramic article at an elevated temperature under superatmospheric nitrogen pressure to increase its density while avoiding crystallization. During heat treatment, at least some of the conditions of time, temperature, heating rate, cooling rate, pressure and atmosphere are controlled to minimize erosion of the article which could otherwise occur due to the loss to the surrounding atmosphere, as a gas or gaseous component, of at least one of nitrogen, silicon and carbon. The heat treated, ceramic article is amorphous and non-crystalline and has a density substantially greater than 2. 5 g/cc together with desirable values of tensile strength and elastic modulus.

US Patent:

59289783, Jul 27, 1999

Filed:

Jul 10, 1997

Appl. No.:

8/890878

Inventors:

Thomas Duncan Barnard - Midland MI
Kimmai Thi Nguyen - Midland MI
James Alan Rabe - Midland MI

Assignee:

Dow Corning Corporation - Midland MI

International Classification:

C04B 35571

US Classification:

501 88

Abstract:

This invention pertains to a method for production of polycrystalline ceramic fibers from silicon oxycarbide (SiCO) ceramic fibers wherein the method comprises heating an amorphous ceramic fiber containing silicon and carbon in an inert environment comprising a boron oxide and carbon monoxide at a temperature sufficient to convert the amorphous ceramic fiber to a polycrystalline ceramic fiber. By having carbon monoxide present during the heating of the ceramic fiber, it is possible to achieve higher production rates on a continuous process.

US Patent:

45475296, Oct 15, 1985

Filed:

Mar 25, 1985

Appl. No.:

6/715604

Inventors:

Chi-Long Lee - Midland MI
James A. Rabe - Midland MI

Assignee:

Dow Corning Corporation - Midland MI

International Classification:

C08J 914

US Classification:

521122

Abstract:

Polyorganosiloxane foams are obtained by blending, dispensing and curing two-part polyorganosiloxane compositions comprising a liquid hydroxyl endblocked polydimethylsiloxane, a liquid alkyl orthosilicate as the curing agent, a catalytically effective amount of a tin compound, a blowing agent and, as a foam stablilizer, a resinous organosiloxane copolymer comprising trimethylsiloxy units, SiO. sub. 4/2 units and a specified class of fluorine-containing organosiloxane units.