Method for drying nonionic alkylene oxide-type water-soluble...

Details Method for drying nonionic alkylene oxide-type water-soluble... Method for drying nonionic alkylene oxide-type water-soluble...

2008-04-08

2008-04-08

Boykin, Terressa (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

C106S122000, C106S132100, C252S385000, C428S035600

Reexamination Certificate

active

07354984

ABSTRACT:
To efficiently dry it, a nonionic alkylene oxide-type water-soluble resin is put into a container, then the container is degassed to a prescribed vacuum degree which is maintained while a dry gas having a dew point not higher than prescribed is introduced into the container at a rate not lower than prescribed. Minor volatiles are efficiently removed from the resin in an evaporation tank having a stirring blade. For protecting the dried resin from water, a dry gas is introduced into and air is purged from an empty packaging container whereafter the resin is charged into the container is sealed. By controlling solvent content and visocity of the resin and loading it into a temperature-controlled transportation container and/or unloading it out of the transportation container by the use of a pump, good subsquent processability of the resin and prevention of deterioration thereof are ensured.

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1986 Encyclopedia of Polymer Science and Engineering Wiley Interscience vol. 6 pp. 225-322.

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