Cpvc pipe having improved resistance to environmental stress cracking
OwnerChristopher D. Zook, Mark D. Juliusinventors
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Abstract
The disclosed technology relates to a plastic compound suitable for preparing articles, such as pipe, with good physical properties, such as impact strength, and resistance to environmental stress cracking (ESC). In particular, the technology relates to a vinyl chloride resin, which includes chlorinated polyvinyl chloride (“CPVC”) homopolymer. Further-more, the invention relates to vinyl chloride homopolymer compounds containing the vinyl chloride homopolymer resin, and articles made from such compounds, which compounds meet 23447 cell classifications under ASTM D1784.
Claims14
A chlorinated vinyl chloride (CPVC) compound comprising (A) at least one high molecular weight chlorinated vinyl chloride polymer resin (CPVC resin), wherein said high molecular weight CPVC resin is prepared by chlorinating a vinyl chloride resin having an inherent viscosity of about 1.02 or greater.
An extruded pipe comprising a CPVC compound comprising (A) at lease one high molecular weight chlorinated vinyl chloride polymer resin (CPVC resin), wherein said high molecular weight CPVC resin is prepared by chlorinating a vinyl chloride resin having an inherent viscosity of about 1.02 or greater.
A method of providing an improved extruded pipe having improved resistance to environmental stress cracking compared to extruded pipe prepared from a CPVC compound having standard molecular weight CPVC resin, comprising extruding the improved extruded pipe from a CPVC compound comprising high molecular weight CPVC resin having a chlorine content of less than 67 wt. %.
Dependencies are inferred from the claim text.