The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 2017
Filed:
Jan. 21, 2014
Applicant:
Sabic Global Technologies B.v., Bergen op Zoom, NL;
Inventor:
Christopher Luke Hein, Evansville, IN (US);
Assignee:
SABIC Global Technologies B.V., Bergen op Zoom, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J 3/42 (2006.01); B01J 19/12 (2006.01); G01N 21/25 (2006.01); G01N 17/00 (2006.01);
U.S. Cl.
CPC ...
G01J 3/42 (2013.01); B01J 19/123 (2013.01); G01N 17/004 (2013.01); G01N 21/25 (2013.01);
Abstract
A method of determining degradation of a thermoplastic when exposed to light and heat includes illuminating the thermoplastic with a desired wavelength of light at a desired irradiance while maintaining the ambient air surrounding the thermoplastic at a desired temperature. The method is useful to measure the discoloration rate of transparent, translucent and opaque thermoplastics such as polycarbonates, the discoloration rate being determined by transmission or reflectance spectra of transmitted or reflected white light through or from the thermoplastic.