Para-phenylene diamine polymer color improvement

Details Para-phenylene diamine polymer color improvement Para-phenylene diamine polymer color improvement

C - Chemistry, Metallurgy

08

G

402/245

C08G 69/48 (2006.01)

Patent

CA 2029184

Title Para-Phenylene Diamine Polymer Color Improvement Abstract of the Disclosure A process is provided for increasing the brightness and decreasing the discoloration of PPD polymer during the polymer production. Sequestering agents having a stability constant (K1), for Fe (III), greater than about 12 are slurried with the PPD polymer in water and then rinsed, neutralized, and dried.

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