NOROX? PULCAT S is a highly reactive liquid mixture of peroxides based on methyl isobutyl ketone, which are antisensitized by aliphatic hydrocarbons. The peroxide is used as a curing agent (free radical source) for unsaturated polyester resins. The main application is the curing of large molded parts at high temperatures (60-120°C).

Technical data.

• Appearance: Colorless liquid
• Active Oxygen Content: Approx. 10.5% w/w
• Antisensitizer: Fatty esters
• Density (20°C): approx. 0.89 g/cm3
• Viscosity (20°C): approx. 5 mPas
• Solubility: insoluble in water, miscible with alcohols and phthalates
• Key temperature (SADT): approx. 50°C
• Refrigeration stability: liquid below -25°C
• Starting temperature: approx. 55°C
• Recommended storage temperature: below 25°C
• Activity retention time at 25°C after delivery: 6 months
• Complies with ElektroG (EU Directives: RoHS 2002/95/EG, WEEE 2002/96/EG)

Applications.

• Polyester resin curing
• Level of use: As a curing agent for UP resins, possibly in combination with cobalt accelerators
• Temperature range: 60-120°C
• Use Level: Use 1-2% of the product in its original packaging and, if required, in conjunction with accelerator COB-1TX at 0.1-0.5%.
• Cures at room temperature, typical "hold time" for resin + peroxide is 4-8 hours.
• Holding time can be extended by lowering the storage temperature
• Resin + peroxide + accelerator "use time" is usually 1-3 hours.
• Can be extended by addition of inhibitor TC-510
• Curing Properties: Relatively long gelatin time at room temperature, but short curing time, can be combined with cobalt accelerators
• Fast curing even in the absence of cobalt above approx. 55°C ("starting temperature")
• Moderate exotherm, low internal stresses
• Moderate cure, post-cure at 80-120°C recommended
• Processing method: specially designed to provide relatively long retention times with the lowest possible starting temperatures and therefore particularly suitable for continuous impregnation of (corrugated) sheets and applied gelatine coatings as well as for fiber winding of pipes and tanks

Measurement data.

• Used to cure the reactivity of polyester resins at room temperature:
  • Resin: Normal phase acid polyester, medium reactivity
  • Temperature: 25°C
  • Method: DIN 16945 (20 g tubes)
  • Formulation: Part by weight
• Used to cure the reactivity of polyester resins at high temperatures:
  • Temperature range: 50°C-80°C

Packaging.

• NOROX? PULCAT S comes in a standard package of 20 kg.

Disclaimer: This information and all further technical advice reflects our existing knowledge and experience based on in-house testing using local raw materials and is intended to inform about our products and applications. This information should not be construed as a guarantee of the specific performance of the products described or their suitability for a particular application, nor should it be construed as providing completeness of the instructions for use. The information does not relate to guarantees of product and shelf-life performance, nor to any liability or other legal responsibility on our part, including in connection with existing third-party intellectual property rights, in particular patents. We reserve the right to make any changes in accordance with technical progress or further developments. The use and application of our products based on our technical recommendations is beyond our control and the sole responsibility of the user. The user is obliged to carefully inspect and test incoming items to verify their suitability for the intended application.