Röhm ACRYMID® TT70 Poly(n-methyl methacrylimide (PMMI)

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Röhm ACRYMID® TT70 Poly(n-methyl methacrylimide (PMMI)
Categories:	Polymer; Thermoplastic; Acrylic (PMMA)
Material Notes:	ACRYMID® TT70 is a highly heat distortion-resistant poly(n-methyl methacrylimide) (PMMI). Besides showing the properties common to all ACRYMID® molding compounds, such as excellent transmission and clarity, very high mechanical strength and rigidity, good weather resistance. ACRYMID® TT70 has the following specific characteristics: high stability of the optical characteristics at long-lasting thermal load, highest heat deflection temperature under load.. Application: ACRYMID® molding compound is particularly suitable for injection molding of items meant for applications that involve maximum thermal loads. Information provided by Roehm America LLC
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Physical Properties	Metric	English	Comments

Specific Gravity	1.21 g/cc	1.21 g/cc	ISO 1183
Water Absorption	6.0 %	6.0 %	saturation, in Water; ISO 62
Melt Flow	1.7 g/10 min @Load 10.0 kg, Temperature 260 °C	1.7 g/10 min @Load 22.0 lb, Temperature 500 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Tensile Strength at Break	80.0 MPa	11600 psi	5 mm/min; ISO 527
Elongation at Break	3.0 %	3.0 %	5 mm/min; ISO 527
Tensile Modulus	4.00 GPa	580 ksi	1 mm/min; ISO 527
Charpy Impact Unnotched	2.00 J/cm²	9.52 ft-lb/in²	ISO 179/1eU

Thermal Properties	Metric	English	Comments
Deflection Temperature at 0.46 MPa (66 psi)	166 °C	331 °F	ISO 75
Deflection Temperature at 1.8 MPa (264 psi)	162 °C	324 °F	ISO 75
Vicat Softening Point	170 °C	338 °F	B / 50; ISO 306

Optical Properties	Metric	English	Comments
Refractive Index	1.54 @Wavelength 589 nm	1.54 @Wavelength 589 nm	ISO 489
Transmission, Visible	>= 91 %	>= 91 %	ISO 13468-2

Processing Properties	Metric	English	Comments
Melt Temperature	260 - 290 °C	500 - 554 °F
Mold Temperature	130 °C	266 °F	Injection Molding
Drying Temperature	<= 120 °C	<= 248 °F	Predrying
Dry Time	2.00 - 3.00 hour	2.00 - 3.00 hour	Predrying, Desiccant-Type Drier

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PROHM9334 / 319951

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