Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1983-07-08
1984-10-23
Griffin, Ronald W.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
264185, 524369, 524388, 524543, C08J 500, C08K 505, C08L 2904
Patent
active
044789718
ABSTRACT:
The invention disclosed herein provides a process for the high temperature extrusion of polyvinyl alcohol monofilament soluble in water comprising the steps of blending from about 80 to 98 percent by weight polyvinyl alcohol resin having a number average molecular weight of from about 10,000 to 200,000 and a degree of hydrolysis of from about 85 to 91 percent with from about 20 to 2 percent by weight of a plasticizer selected from the group consisting of hydroxyethers, diols, triols and other polyols and mixtures thereof, reducing the moisture content of the resin to a level of less than about one percent and the volatile content thereof to a level of less than about two percent and, melt extruding the blend to form monofilaments. A novel high temperature extruded polyvinyl alcohol monofilament, soluble in water, comprises from about 80 to 98 percent by weight polyvinyl alcohol resin having a number average molecular weight of from about 10,000 to 200,000 and a degree of hydrolysis of from about 85 to 91 percent and from about 20 to 2 percent by weight of a plasticizer selected from the group consisting of hydroxyethers having an average molecular weight of less than 325 and greater than 550 and having the formula ##STR1## wherein R is hydrogen or methyl and R.sub.1 is hydrogen, an alkyl group having from one to about 12 carbons and aromatic groups having from six to about 10 carbon atoms and n is an integer that will provide the aforementioned average molecular weight, diols, triols and other polyols having from two to about 10 carbons including mixtures thereof.
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Griffin Ronald W.
Shakespeare Company
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