Basic Information

• Name: NOROX? CHM-50
• CAS No.: 80-15-9
• Structural formula: slightly yellowish liquid

descriptive

• NOROX? CHM-50 is a solution containing cis-isopropylbenzene peroxide and an accelerator. It is a liquid polymerization initiator for curing vinyl ester resins at room temperature and has the following advantages and properties:
  • Moderate peak exotherm, usually lower than methyl ethyl ketone peroxides (MEKPs).
  • Medium gel time in vinyl ester resins.
  • Excellent final cure.
  • Low impurity levels (water, hydrogen peroxide, salt, etc.).
  • No gas generation.

Technical data

• Appearance: slightly yellowish liquid
• Activated Oxygen (AO): approximately 4.51 TP3T w/w
• Density @ 20°C: approx. 1.04 g/cm3.
• Flash point: approx. 60°C
• SADT: approx. 60°C
• Recommended storage temperature: max. 30°C, not more than 25°C for maximum shelf life
• Storage stability from date of delivery: 6 months

Standard Packaging

• 5 kg (8 lb) and 25 kg (40 lb) HDPE drums

statement denying or limiting responsibility

• The information contained herein and all further technical advice that United Initiators may provide reflects our current knowledge and experience with our products and applications based on our in-house research and development.United Initiators makes no warranty as to the product-specific nature of the information provided, its suitability for a particular application, or the completeness of the instructions for use provided.
• In addition, United Initiators does not guarantee the product and shelf-life characteristics. United Initiators assumes no liability for the use of the information provided, including aspects relating to existing third-party intellectual property rights, in particular patents.
• We reserve the right to make any changes based on technological advances or further developments. The use and utilization of our products based on our technical recommendations is beyond our control and is strictly at the user's own risk, and it is the user's responsibility to conduct careful inspection and testing of incoming products to verify their suitability for the intended application.

appliance

• NOROX? CHM-50 is an excellent liquid polymerization initiator for room temperature curing of Novolak's vinyl epoxy resins, which require a reasonably long cure time without outgassing. Gel times and peak times are typically longer than those obtained with MEKP products such as NOROX? ENP-102. However, the hardness of the final cured resin is usually superior to that initiated with MEKPs. After curing, styrene emission levels are usually lower than with MEKPs.

decomposition product

• Possible detectable breakdown products: ethylbenzophenone, cis-isopropanol

save

• Protect the product from impurities by avoiding any heat, light, and humidity. Please store in a safe temperature range.