Invention Grant
- Patent Title: Method for determining degradation of thermoplastics
- Patent Title (中): 确定热塑性塑料退化的方法
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Application No.: US14159579Application Date: 2014-01-21
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Publication No.: US09557218B2Publication Date: 2017-01-31
- Inventor: Christopher Luke Hein
- Applicant: SABIC Global Technologies B.V.
- Applicant Address: NL Bergen op Zoom
- Assignee: SABIC Global Technologies B.V.
- Current Assignee: SABIC Global Technologies B.V.
- Current Assignee Address: NL Bergen op Zoom
- Agency: Baker & Hostetler LLP
- Main IPC: G01J3/42
- IPC: G01J3/42 ; B01J19/12 ; G01N21/25 ; G01N17/00
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.
Public/Granted literature
- US20140204381A1 Method for Determining Degradation of Thermoplastics Public/Granted day:2014-07-24
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