C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
182/11, 402/399,
C08F 6/24 (2006.01) B01D 37/02 (2006.01) C08F 6/00 (2006.01) C08F 26/10 (2006.01) C08L 39/06 (2006.01)
Patent
CA 1296476
IMPROVED INSOLUBLE VINYL LACTAM CLARIFIERS ABSTRACT The invention relates to highly filterable polyvinyl polypyrrolidone particles and to the process for improving filterability of standard polyvinyl poly- pyrrolidone granules, wet cakes and slurries which comprises heating granular polyvinyl polypyrrolidone, containing a minor amount of non-crosslinked and/or unsaturated sites while maintaining between 1 wt. % and 20 wt. % moisture at a temperature of between about 50°C. and about 250°C. under a pressure of from about 5 psig. to about 200 psig. and collecting product having an average particle size distribution between about 40 and 400 mesh, a non-volatile water solubtes (NVWS) content less than 2 and a filter flow rate greater than 95.
560095
Cottrell Ian W.
Pelesko John D.
Smith Terry E.
Cottrell Ian W.
Gaf Corporation
Pelesko John D.
Smart & Biggar
Smith Terry E.
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