Flow property shelf life of PVC dry blend powders

Details Flow property shelf life of PVC dry blend powders Flow property shelf life of PVC dry blend powders

1991-08-26

1993-08-03

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

526344, C08F 600, C08J 320

Patent

active

052330222

ABSTRACT:
A method of cooling a PVC dry blend powder in a vessel by spraying a liquified inert gas into the vessel such that the liquified inert gas contacts the powder. The PVC dry blend powder is made by mixing a powdered PVC resin with ingredients selected from the group consisting of plasticizers, stabilizers, and pigments in a mixing vessel by using a heating and mixing cycle followed by a liquified inert gas cooling cycle. The flow properties of PVC dry blend powder made by this method have an improved shelf life.

REFERENCES:
patent: 4107421 (1978-08-01), Scamehorn et al.

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