LOREN KENNETH GIBBONS
Pilots in Pointe Aux Pins, MI
License number
Michigan A0671448
Issued Date
Apr 2016
Expiration Date
Apr 2018
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
PO Box 895, Pointe Aux Pins, MI 49775
Professional information
High Impact Polystyrene Containing Polyphenylene Oxide
US Patent:
6177512, Jan 23, 2001
Filed:
Aug 2, 1999
Appl. No.:
9/365434
Inventors:
Loren K. Gibbons - Pointe aux Pins MI
Jeffrey Silloway - Marietta OH
Jason J. Miller - Cutler OH
Michael J. Hanner - Marietta OH
Seldon L. Dotson - Parkersburg WV
Jeffrey Silloway - Marietta OH
Jason J. Miller - Cutler OH
Michael J. Hanner - Marietta OH
Seldon L. Dotson - Parkersburg WV
Assignee:
Chevron Chemical Company LLC - San Francisco CA
International Classification:
C08F27902, C08L 5104, C08L 5502
US Classification:
525 53
Abstract:
In the present invention, a process is provided for producing high impact polystyrene of improved heat resistance. According to the invention, after phase inversion of the rubber-polystyrene system, a slurry of PPE in styrene is added in situ to the process. The PPE slurry in styrene contains greater than 15 wt. % of PPE and is introduced to the process at point past rubber phase inversion, preferably at point where total polymer solids is greater than 40 wt. % of the total weight of the polymerization mixture. Preferably, four continuous stirred tank reactors in series are used in the process and preferably the slurry of PPE in styrene monomer is introduced to the third CSTR.