WILLIAM E THURSTON
Vehicle Board in Pittsburgh, PA
License number
Pennsylvania MV153495L
Category
Vehicle Board
Type
Vehicle Salesperson
Address
Address
Pittsburgh, PA 15201
Professional information
Propylene-Based Compositions Of Enhanced Appearance And Excellent Mold Flowability
US Patent:
2012015, Jun 21, 2012
Filed:
Dec 16, 2011
Appl. No.:
13/328515
Inventors:
Antonios K. Doufas - Pittsburgh PA, US
Edward Catalina - Greensburgh PA, US
William C. Thurston - Pittsburgh PA, US
Rita Majewski - Pittsburgh PA, US
Edward Catalina - Greensburgh PA, US
William C. Thurston - Pittsburgh PA, US
Rita Majewski - Pittsburgh PA, US
International Classification:
C08L 23/16, C08L 23/12
US Classification:
524451, 524528
Abstract:
The present invention relates to a class of impact copolymer polypropylene (ICP) compositions exhibiting the advantageous combination of excellent tiger (flow) marking performance in large/long molded parts, very low gels count and exceptional mold flowability (high MFR) despite the high viscosity ratio (e.g., >4) between rubber and propylene based matrix phases. The inventive compositions exhibit significantly reduced the levels of volatiles, and excellent stiffness-impact balance used as standalone materials or in filled compounds. The significantly reduced number of large gels leads to excellent surface appearance and paintability of the molded parts. The composition of the present invention is made with a bulk/gas reactor process (i.e., non-slurry/non-solvent process) that has the advantage of process simplicity, process efficiency and simplicity of compositional structure relative to the complexity in structure and process of making of compositions in the prior art.
Impact Copolymers Having Improved Properties
US Patent:
2008026, Oct 30, 2008
Filed:
Apr 30, 2007
Appl. No.:
11/796887
Inventors:
Antonios K. Doufas - Pittsburgh PA, US
Jeffrey S. Salek - Oakdale PA, US
Ronald A. Andrekanic - White Oak PA, US
William C. Thurston - Pittsburgh PA, US
Leon M. Rice - Pittsburgh PA, US
Jeffrey S. Salek - Oakdale PA, US
Ronald A. Andrekanic - White Oak PA, US
William C. Thurston - Pittsburgh PA, US
Leon M. Rice - Pittsburgh PA, US
International Classification:
C08L 23/00, B32B 5/16
US Classification:
428402, 26432817, 525240
Abstract:
Improvements in the aesthetic appearance and performance properties of heterophasic polymers is obtained through the breaking up and dispersion of large gels. According to the current invention, a novel process is provided for filtration of heterophasic polymers using a fiber metal felt (FMF) media. Molded articles made from impact copolymers prepared according to the present invention have improved appearance and fracture mechanics relative to impact copolymers produced according to prior art methods.