Luke R Stephens

US Patent:

20160168338, Jun 16, 2016

Filed:

May 3, 2013

Appl. No.:

14/777639

Inventors:

- Baytown TX, US
Shawn W. Mowry - Houston TX, US
Luke P. Stephens - Humble TX, US
Michael B. Rodgers - Cedar Park TX, US
Yuan-Ju Chen - Houston TX, US
Molly W. Upton - Baytown TX, US
Marvin C. Hill - Spring TX, US

International Classification:

C08J 3/21
C08L 23/28
C08L 25/16
C08K 3/34

Abstract:

To obtain an elastomeric composite crumb having a majority of the particle size distribution greater than 0.33 cm, the crumb is obtained by a process whereby the elastomeric composite comprises less than about 0.5 phr of a salt of a Cto Ccarboxylic acid, or 10 to 20 phr of a tackifying resin or a combination of both an absence of carboxylic acid and the presence of the tackifying resin. The use of one or both methods permits control of crumb particle size distribution in emulsion or solution processes for producing elastomeric nanocomposites. The elastomeric composite is also disclosed.

US Patent:

20160115306, Apr 28, 2016

Filed:

Jan 8, 2016

Appl. No.:

14/991720

Inventors:

- Baytown TX, US
Yu Feng Wang - Houston TX, US
Luke P. Stephens - Humble TX, US
Florin Barsan - Pearland TX, US
Douglas A. Berti - Houston TX, US

International Classification:

C08L 23/10

Abstract:

A blended multimodal polymer product is disclosed that comprises a first polymer, wherein the first polymer is a homopolymer of propylene or a propylene copolymer having an ethylene or a Cto Colefin comonomer; and a second polymer, wherein the second polymer is a propylene homopolymer and a propylene copolymer having an ethylene or a Cto Colefin comonomer, and wherein the first polymer and second polymer have a difference in heat of fusion of about 25 J/g or more. Methods for making such a polymer product using at least two reactors in parallel and for separating a propylene-based polymer from a solvent using a liquid-phase separator are also disclosed.

US Patent:

20150045513, Feb 12, 2015

Filed:

Feb 28, 2013

Appl. No.:

14/378011

Inventors:

- Baytown TX, US
Yu Feng Wang - Houston TX, US
Luke P. Stephens - Humble TX, US
Florin Barsan - Pearland TX, US
Douglas A. Berti - Houston TX, US

International Classification:

C09J 123/16
C08F 6/12

US Classification:

525240, 526348

Abstract:

A blended multimodal polymer product is disclosed that comprises a first polymer, wherein the first polymer is a homopolymer of propylene or a propylene copolymer having an ethylene or a Cto Colefin comonomer; and a second polymer, wherein the second polymer is a propylene homopolymer and a propylene copolymer having an ethylene or a Cto Colefin comonomer, and wherein the first polymer and second polymer have a difference in heat of fusion of about 25 J/g or more. Methods for making such a polymer product using at least two reactors in parallel and for separating a propylene-based polymer from a solvent using a liquid-phase separator are also disclosed.