Ultra-violet stabilized polyvinyl chloride resins and methods to impart ultra-violet stabilization to polyvinyl chloride resins
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United States of America Patent
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Sep 21, 1999
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N/A
app pub date -
Jul 17, 1997
filing date -
Jul 17, 1997
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Expired
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Abstract
Ultra-violet stabilized polyvinyl resins, such as polyvinyl chloride, are disclosed. The ultra-violet stabilized polyvinyl resins comprise polyvinyl resins and a stabilizer comprising a benzylidene malonic ester of 1,2,2,6,6-pentamethylpiperidinol or its derivatives. The stabilizer can be added to or dispersed within the polyvinyl resins prior to any objects or articles being formed from the resins. Also disclosed is a method to impart ultra-violet stabilization to polyvinyl resins which includes the step of adding to or dispersing within the polyvinyl resins, a stabilizer comprising a benzylidene malonic ester of 1,2,2,6,6-pentamethylpiperidinol or its derivatives. The invention further includes the addition of an ultra-violet absorber such as ethane diamine, n-(2-ethoxyphenyl)-n.sup.1 -(4-ethyl phenyl) to the polyvinyl resin composition.
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