Process and apparatus for manufacture of processable polyvinyl alcohol

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12139598
APP PUB NO 20220002518A1
SERIAL NO

17368164

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Abstract

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The invention describes a method for manufacture of plasticized homopolymeric polyvinyl alcohol, the method including the steps of introducing a polyvinyl alcohol polymer or a blend thereof having a degree of hydrolysis in the range of 93 wt % to 98 wt % into a mixing reactor; adding a processing agent, a plasticizer and a reactive stabilizer to form a reaction mixture; wherein the plasticizer is selected from the group consisting of sugar alcohols, diols, triols, polyols and mixtures thereof; wherein the reactive stabilizer is selected from the group consisting of sodium stearate, potassium oleate, sodium benzoate, calcium stearate, stearic acid, dimethyl propionic acid, and mixtures thereof; —reacting the reaction mixture in a reaction zone to form plasticized polymer; and—allowing the plasticized polymer to pass from the reaction zone.

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Patent Owner(s)

Patent OwnerAddress
AQUAPAK IP LIMITEDHOLLYMOOR POINT HOLLYMOOR WAY RUBERY BIRMINGHAM WEST MIDLANDS B31 5HE UNITED KINGDOM

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ashworth, Robert Colwyn Bay, GB 13 118
Griffiths, Sian Glan Conwy, GB 14 17
Williams, John Chirbury, GB 198 1333

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