Method for Prediction of Photoconductor Pot-Life Solutions
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
Photoconductor (PC) solutions containing CDB in basic solvents degrade with time and lead to unacceptable electrical properties in the completed PC coatings. A method is described to measure the time over which PC solutions containing CDB are acceptable as coating solutions (pot-life). The procedure utilizes colorimetric techniques to measure tri-stimulus values of the PC CDB solutions. The changes in the tri-stimulus values with time as the solution degrades are correlated with the electrical properties of the completed PC coating and a point is determined for PC acceptance. Specifically when utilizing the Pacific Scientific SPECTROGUARD COLOR SYSTEM* values of Rd, ar, and br are measured and a P factor is calculated by the equation: P factor = (ar+br) (Rd+5) (200)/Rd(Rd+105). The values of the P factor vs.