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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Gababa; Vlodek
Address:
Richmond, VA
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
5247056 Para-phenylene diamine polymer color improvement September 21, 1993
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 (K.sub.1), for Fe(III), greater than about 12 are slurried with the PPD polymer in water and then rinsed,










 
 
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