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Rulon Bearings

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CHT Group QM Cat SR2 Condensation Cure, Styrene Resistant Moldmaking Catalyst
Categories: Polymer; Thermoset; Silicone

Material Notes: Product Description: QM Cat SR2 is the standard catalyst for the QM 100 series when casting polyester resins. This is a two-component, room temperature, condensation cure system. The cured rubber has excellent mechanical properties and good shelf-life stability. This is the styrene resistant version of the standard catalysts and is available as QM Cat Blue SR2, QM Cat Purple SR2 and QM Cat Red 3 SR2.

Key Features:

  • Good work life
  • Fast demold time
  • Excellent physical properties
  • Excellent styrene resistance
Main Applications:
  • Molds for polyester resin castings
  • Molds where styrene resistance is required

Formerly Amber Chemical Co (ACC Silicones), aquired by CHT in 2017

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Physical PropertiesOriginal ValueComments
Specific Gravity 1.00 g/ccUncatalyzed, QM Cat Blue SR2
 1.00 g/ccUncatalyzed, QM Cat Purple SR2
 1.00 g/ccUncatalyzed, QM Cat Red 3 SR2
Viscosity 100 cPUncatalyzed, QM Cat Blue SR2
 100 cPUncatalyzed, QM Cat Purple SR2
 100 cPUncatalyzed, QM Cat Red 3 SR2
 
Processing PropertiesOriginal ValueComments
Cure Time 4.00 - 6.00 hourDemold time, Catalyzed, QM Cat Red 3 SR2
 12.0 - 16.0 hourDemold time, Catalyzed, QM Cat Purple SR2
 16.0 - 24.0 hourDemold time, Catalyzed, QM Cat Blue SR2
Tack-Free Time 0.750 - 1.00 hourCatalyzed, QM Cat Red 3 SR2
 4.00 - 6.00 hourCatalyzed, QM Cat Purple SR2
 6.00 - 8.00 hourCatalyzed, QM Cat Blue SR2
Pot Life 15.0 minCatalyzed, QM Cat Red 3 SR2
 45.0 minCatalyzed, QM Cat Purple SR2
 60.0 minCatalyzed, QM Cat Blue SR2
 
Descriptive Properties
ColorBlueUncatalyzed, QM Cat Blue SR2
 Light blueCatalyzed, QM Cat Blue SR2
 Light purpleCatalyzed, QM Cat Purple SR2
 Light redCatalyzed, QM Cat Red 3 SR2
 PurpleUncatalyzed, QM Cat Purple SR2
 RedUncatalyzed, QM Cat Red 3 SR2

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PACC2068 / 199456

Master Bond adhesives

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