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Diakon® CMG302
Diakon® CMG302 is a general-purpose PMMA compound that provides balanced properties for injection molding and extrusion to create high-quality parts.
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- Manufacturer: Mitsubishi Chemical Group
- Product Line: Diakon® and Elvakon® PMMA
- Product: Diakon® PMMA
- Industries: Plastics
- Authorized Countries: United States
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Overview
Diakon® CMG302 is a polymethyl methacrylate (PMMA) product with intermediate performance properties within the Diakon® product line. It is, therefore, used as a general-purpose grade characterized by an intermediate melt flow index and a high degree of mechanical strength. Like other Diakon® grades, CMG302 offers high light transmission for excellent optical properties useful in creating injection molded or extruded parts such as optical lenses and medical device parts. Diakon® CMG302 also has very low haze. Though CMG302 provides balanced properties, part manufacturers looking for higher impact strength for PMMA may have better success with one of the Diakon® impact-modified compounds, such as Diakon® CTG825 or Diakon® CTG830.
Specifications
Melt flow index, g/10 min: 4.4
Vicat softening point, °C (ISO 306A): 113
Vicat softening point, °C (ISO 306B): 106
Heat deflection temperature, °C (ISO 75A): 99
Heat deflection temperature, °C (ISO 75B): 102
Coefficient of expansion, cm/cm/°C x 10-5: 7.1
Light transmission, %: 92
Haze, %: 0.4
Refractive index: 1.49
Tensile strength, MPa: 80
Elongation, %: 5
Flexural modulus, GPa: 3.2
Flexural strength, MPa: 110
Izod impact strength, kJ/m2: 1.8
Charpy impact strength, kJ/m2 (ISO 179/1eA): 2.0
Charpy impact strength, kJ/m2 (ISO 179/1eU): 20
Relative density: 1.18
Rockwell hardness, M scale: 98
Ball indentation hardness, MPa: 185
Mold shrinkage, %: 0.4–0.7
Water absorption, %: 0.3
Flammability: HB
Glow wire test, °C: 650
Primary Chemistry: PMMA
Features & Benefits
- Extremely high optical clarity and light transmission
- Excellent tensile and flexural strength
- General-purpose grade
- Strong resistance to weathering and yellowing
Problems Solved
Poor light transmission through acrylic parts Deterioration of clarity and color under exposure to harsh environments Breaking of parts due to tensile or flexural stress
Applications
Injection molding Extrusion
Related Chemistries
Plastics
Related End Markets
Related Functions
Plastics
Related Processes
Plastics
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