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Pentox 40 is peroxide initiator for copolymerization of unsaturated resins polyester. They are mainly used with cobalt accelerators at temperature surroundings. These initiators are particularly suitable in those applications where it is required fast molding with transfer of the core, for example cold forming or in injection molding techniques. Compared to the Metox-50 hardener, they contain a lower amount of active oxygen. However, they show a similar one gel time and a greater exothermic effect, therefore, they are not recommended for use in production too thick layers in one operation, as well as for hardening gel coats.

Functions: Initiator

Chemical Family: Peroxides

Compatible Polymers & Resins: Polyesters

Processing Methods: Centrifugal Casting, Compression Molding, Lamination, Resin Transfer Molding, Spray Lay-Up

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
Plastics & Elastomers Functions

Features & Benefits

Labeling Claims

Applications & Uses

Compatible Polymers & Resins
Plastics & Elastomers End Uses
Applications
  • Manual and spray lamination
  • RTM (resin transfer molding)
  • Cold press molding
  • Polymer concrete and artificial marble
  • Centrifugal casting
  • Continuous lamination

Properties

Physical Form
Appearance
Clear, Colorless Solution, Clear Red Solution
Character
Acetylacetone Peroxide (2,4-pentanedione peroxide)
Soluble in
Water, Ethyl Acetate, Dimethyl Tar
Typical Properties
ValueUnitsTest Method / Conditions
Active Oxygen Content4.0 - 4.2%
Density (22°C)1.050 - 1.055g / cm³
Organic Peroxide Content30 - 33%
SADT60°C
Gel Time28 - 29min
Highest Temperature172.0 - 180.0°C
Storage Temperature0 - 25°C
Time to Peak Temperature37 - 39min
Water Contentapprox. 6.2%

Regulatory & Compliance

Certifications & Compliance

Safety & Health

Threats

Oxidizing agent, decomposes rapidly under the influence of heat and pollution mechanical or through contact with reducing agents. You never must mix the hardener with the accelerator.