FORMULATION OF COMPLEX COATING MIXTURES WITH EFFECT PIGMENTS

• US 20150127269A1
• Filed: 11/07/2013
• Published: 05/07/2015
• Est. Priority Date: 11/07/2013
• Status: Active Grant

• Current Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Original Assignee: PPG Industries Ohio Incorporated (Nouryon BV)
• Inventors: Bell, Steve, Haskings, Phil
• Granted Patent: US 9,482,657 B2
• Time in Patent Office: Days
• US Class Current: 702/22
• CPC Class Codes: G01J 3/463 Colour matching
• CPC Class Codes: G01J 3/504 Goniometric colour measurements, for example measurements of metallic or flake based paints
• CPC Class Codes: G01N 2021/575 Photogoniometering
• CPC Class Codes: G01N 2021/8427 Coatings
• CPC Class Codes: G01N 21/255 Details, e.g. use of specially adapted sources, lighting or optical systems
• CPC Class Codes: G01N 21/4738 Diffuse reflection precedence is given to G01N21/55 - G01N21/57 if specular component is taken into consideration, e.g. also for testing fluids, fibrous materials
• CPC Class Codes: G01N 21/8422 Investigating thin films, e.g. matrix isolation method
• CPC Class Codes: G01N 33/32 Paints; inks investigating resistance to the weather, to corrosion, to light G01N17/00

Abstract

A computer implemented method. The method includes obtaining, using a processor, reflectance data from a target coating and calculating, using the processor, a reflectance from the data, wherein calculating comprises performing a calculation using a radiative transfer equation. The method also includes generating, using the processor and based on the reflectance, a coating formulation that is the same or substantially similar in appearance to the target coating.

Claims

1. A computer implemented method, comprising:

obtaining, using a processor, reflectance data from a target coating;

calculating, using the processor, a reflectance from the data, wherein calculating comprises performing a calculation using a radiative transfer equation; and

generating, using the processor and based on the reflectance, a coating formulation that is the same or substantially similar in appearance to the target coating.

2. The method of claim 1, wherein the radiative transfer equation comprises a modified radiative transfer equation.

3. The method of claim 1, further comprising optimizing the coating formulation.

4. The method of claim 1, further comprising calculating a plurality of radiative transfer parameters from reflectance data obtained from at least one calibration panel.

5. The method of claim 4, further comprising obtaining the reflectance data from the at least one calibration panel.

6. The method of claim 1, further comprising changing the coating formulation by removing at least one toner from the coating formulation.

7. A system, comprising:

a database; and

a processor in communication with the database and programmed to;

obtain reflectance data from a target coating;

calculate a reflectance from the data, wherein calculating comprises performing a calculation using a radiative transfer equation; and

generate, based on the reflectance, a coating formulation that is the same or substantially similar in appearance to the target coating.

8. The system of claim 7, further comprising a spectrophotometer in communication with the processor.

9. The system of claim 7, wherein the processor comprises an analysis module, a display module, and an input/output module.

10. The system of claim 7, wherein the processor is further programmed to optimize the coating formulation.

11. The system of claim 7, wherein the processor is further programmed to calculate a plurality of radiative transfer parameters from reflectance data obtained from at least one calibration panel.

12. An apparatus, comprising:

means for obtaining reflectance data from a target coating;

means for calculating a reflectance from the data, wherein calculating comprises performing a calculation using a radiative transfer equation; and

means for generating, based on the reflectance, a coating formulation that is the same or substantially similar in appearance to the target coating.

13. The apparatus of claim 12, further comprising means for optimizing the coating formulation.

14. The apparatus of claim 12, further comprising means for calculating a plurality of radiative transfer parameters from reflectance data obtained from at least one calibration panel.

15. A non-transitory computer readable medium including software for causing a processor to:

obtain reflectance data from a target coating;

calculate a reflectance from the data, wherein calculating comprises performing a calculation using a radiative transfer equation; and

generate, based on the reflectance, a coating formulation that is the same or substantially similar in appearance to the target coating.

16. The medium of claim 15, further comprising software for causing the processor to optimize the coating formulation.

17. The medium of claim 15, further comprising software for calculating a plurality of radiative transfer parameters from reflectance data obtained from at least one calibration panel.