CPVC PIPE FITTING THAT HAS IMPROVED RESISTANCE TO CRACKING DUE TO ENVIRONMENTAL STRESSES
Patent Information
- Authority / Receiving Office
- MX · MX
- Patent Type
- Patents
- Current Assignee / Owner
- LUBRIZOL ADVANCED MATERIALS INC
- Filing Date
- 2017-06-16
- Publication Date
- 2026-06-12
AI Technical Summary
CPVC resins are prone to environmental stress cracking (ESC) and have low impact resistance, making them challenging to process and use in applications where they come into contact with liquids, despite their excellent thermal and chemical properties.
The use of high molecular weight CPVC resin, prepared by chlorinating vinyl chloride resin with an intrinsic viscosity of 0.79 or greater, combined with conventional molecular weight CPVC resin, and additional additives like stabilizers and impact modifiers, to create a CPVC compound that enhances ESC resistance and maintains or improves impact resistance.
The CPVC compound exhibits significantly improved resistance to environmental stress cracking and maintains or exceeds impact resistance, meeting ASTM D1784 Cellular Class 23447 requirements, ensuring longer durability and reliability in applications involving liquids.