Polyvinyl chloride resin compositions and manufacturing method therefor
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United States of America Patent
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Oct 16, 2012
Grant Date -
Aug 18, 2011
app pub date -
Oct 5, 2009
filing date -
Oct 8, 2008
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Abstract
A polyvinyl chloride resin composition contains: from 0.005 to 5 parts by weight of a polyvinyl alcohol having a viscosity average degree of polymerization of from 100 to 3000 and having a ratio Mw/Mn of a weight average molecular weight Mw to a number average molecular weight Mn of from 2.2 to 4.9; and from 0.01 to 5 parts by weight of a zinc compound, based on 100 parts by weight of a polyvinyl chloride resin. A polyvinyl chloride resin composition is thereby provided that enables to obtain a shaped article thereof excellent in thermal stability while being shaped and less colored.
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