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Master Bond adhesives

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CHT Group QM 245 QSI Quantum Silicones 45 Durometer Addition Cure Moldmaking Material
Categories: Polymer; Thermoset; Silicone

Material Notes: QM 245 is a two component, room temperature addition cure silicone material. The cured rubber has excellent mechanical properties and good shelf-life stability. This material is a good choice for the molding of furniture, picture frames and architectural materials. QM 245 is exceptionally good where highly detailed parts and mold flexibility are required. Complies with FDA indirect food contact regulation CFR 177.2600 (Red Catalyst only is CFR 177.2600 compliant)

Key Features:

  • Excellent tear resistance
  • Casting resin resistance
  • Fast demold time
  • Good mold flexibility
Main Applications:
  • Molds for architectural replication
  • Molds for polyester, polyurethane and epoxy resin castings
  • Molds for technical articles and prototype
  • Molds for furniture and picture frame replication

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

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Physical PropertiesOriginal ValueComments
Specific Gravity 0.960 g/ccUncatalyzed, QM 245B
 1.34 g/ccBase
Viscosity 2000 cPUncatalyzed, QM 245B
 30000 cPcatalyzed with QM 245B
 50000 cPBase
Linear Mold Shrinkage <= 0.0010 cm/cmcured 72 hrs @ RT
Storage Temperature <= 38.0 °C12 months
 
Mechanical PropertiesOriginal ValueComments
Hardness, Shore A 45cured 72 hrs @ RT
Tensile Strength 4.10 MPacured 72 hrs @ RT
Elongation at Break 400 %cured 72 hrs @ RT
 
Thermal PropertiesOriginal ValueComments
Maximum Service Temperature, Air 204 °C
Minimum Service Temperature, Air -55.0 °C
 
Processing PropertiesOriginal ValueComments
Cure Time 6 - 8 hourDemold time, catalyzed with QM 230F B
Pot Life 42.0 mincatalyzed with QM 245F B
 
Compliance PropertiesOriginal ValueComments
FDA Yes
 
Descriptive Properties
ColorBeigeBase
 Dark RedUncatalyzed, QM 245B
 Redcatalyzed with QM 245F B

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PACC066 / 22193

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