Chemistry of BMC A World of Choices Chemistry of BMC A World of Choices
What a BMC Is Thermoset Having the property of becoming permanently hard and rigid when heated or cured. Uses crosslinking as the mechanism to develop rigidity and strength. What a BMC Is Thermoset Having the property of becoming permanently hard and rigid when heated or cured. Uses crosslinking as the mechanism to develop rigidity and strength.
What a BMC Isn’t Thermoplastic Having the property of softening or fusing when heated and of hardening and becoming rigid again when cooled; thermoplastic materials can be remelted and cooled time after time without undergoing any appreciable chemical change. What a BMC Isn’t Thermoplastic Having the property of softening or fusing when heated and of hardening and becoming rigid again when cooled; thermoplastic materials can be remelted and cooled time after time without undergoing any appreciable chemical change.
Resin Choices Different Acids and Alcohols Isophthalic Acid Maleic Acid Fumaric Acid Propylene Glycol Diethylene Glycol Neopentyl Glycol Resin Choices Different Acids and Alcohols Isophthalic Acid Maleic Acid Fumaric Acid Propylene Glycol Diethylene Glycol Neopentyl Glycol
Styrene: Crosslinking Genius Dilutes the polyester resin and participates in the crosslinking of the polymers Styrene: Crosslinking Genius Dilutes the polyester resin and participates in the crosslinking of the polymers CH=CH 2 2 Styrene
Low Profile Additives Ranked from least effective to most effective Polyethylene Polystyrene PolyMethylmethacrylate Polyvinyl Acetate Low Profile Additives Ranked from least effective to most effective Polyethylene Polystyrene PolyMethylmethacrylate Polyvinyl Acetate
Polystyrene as a Low Profile Additive
Filler (aka Ground Rock) ATH CAC0 3 Clay Graphite Talc And others..... Filler (aka Ground Rock) ATH CAC0 3 Clay Graphite Talc And others.....
ATH vs. CAC0 3 Which does your application require? ATH CAC0 3 3
Fiberglass Sizing Filament Diameter Length Amount Fiberglass Sizing Filament Diameter Length Amount
In Line Fiberglass Process
Additives Initiators - temperature ranges Pigments Release Agents - Ca vs. Zn Thickeners - Chemical vs. Physical Antioxidants - Heat Stability UV Stabilizers Additives Initiators - temperature ranges Pigments Release Agents - Ca vs. Zn Thickeners - Chemical vs. Physical Antioxidants - Heat Stability UV Stabilizers
Physical Form Shrink, Density, Cure Physical Form Shrink, Density, Cure The Composite
BMC Mixer
BMC Property Range Glass Range, % Specific Gravity Mold Shrinkage, mil/in Flexural Strength, Kpsi Flexural Modulus, psi Tensile Strength, Kpsi Notched Izod, Fppi Water Absorption, %, 24 Hours Arc Resistance, sec Dielectric Strength, V/mil UL 94 Flame Resistance Heat 264 psi, Thermoconductivity, btu/hrs/ft2/0F/in Glass Transition Temperature, Tg Glass Range, % Specific Gravity Mold Shrinkage, mil/in Flexural Strength, Kpsi Flexural Modulus, psi Tensile Strength, Kpsi Notched Izod, Fppi Water Absorption, %, 24 Hours Arc Resistance, sec Dielectric Strength, V/mil UL 94 Flame Resistance Heat 264 psi, Thermoconductivity, btu/hrs/ft2/0F/in Glass Transition Temperature, Tg x HB – 1/32 °F °C x HB – 1/32 °F °C