Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1991-04-08
1991-12-31
Page, Thurman K.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
424490, 424405, 424 7824, 427213, 428402, A61K 3179, A01N 2500
Patent
active
050770470
ABSTRACT:
A process for the production of PVP-H.sub.2 O.sub.2 products in the form of free-flowing powders is described in which a fluidized bed maintained at a reaction temperature of about room temperature to 60.degree. C. is contacted with finely divided droplets of a 30 to 85% by weight aqueous H.sub.2 O.sub.2 solution. Preferably the fluidized bed temperature is about 35.degree.-45.degree. C., a 50-70% H.sub.2 O.sub.2 solution is used, and the feed rate of introduction of the H.sub.2 O.sub.2 solution is about 5-50 g/minute/kg PVP present. The PVP-H.sub.2 O.sub.2 product preferably contains about 15-24%, preferably 18-22%, H.sub.2 O.sub.2 (1:1 molar ratio) and less than about 5% water.
REFERENCES:
patent: 3480557 (1969-11-01), Shiraeff
patent: 3908045 (1975-09-01), Alterman et al.
patent: 4655786 (1987-04-01), Chun et al.
patent: 5008106 (1991-04-01), Merianos et al.
patent: 5017383 (1991-05-01), Ozawa et al.
Biss Russell B.
Cohen Jeffrey
Merianos John J.
Taylor Paul D.
Hulina Amy
ISP Investments Inc.
Katz Walter
Maue Marilyn J.
Page Thurman K.
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