Plasticized polyvinyl alcohol compositions, forming process and

Details Plasticized polyvinyl alcohol compositions, forming process and Plasticized polyvinyl alcohol compositions, forming process and

1984-01-09

1985-08-20

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524169, 524104, 524230, 524557, C08K 552

Patent

active

045365326

ABSTRACT:
Formed articles made from polyvinyl alcohol having an oxygen permeability of no more than about 1 cc mil/100 in.sup.2 24 hr atm. at 80% relative humidity, compositions suitable for use in manufacturing such articles and a process for manufacturing such articles by forming polyvinyl alcohol containing a non-hydroxyl plasticizer in a substantially water-free condition and cooling at a rate sufficiently slow to provide the enhanced impermeability, are disclosed.

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Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd Edition, 1983, vol. 23, p. 854.
Physics of Plastics, P. D. Ritchie, 1965, p. 350.

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