Röhm ACRYLITE® Heatresist hw55 Acrylic Molding Compound

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Röhm ACRYLITE® Heatresist hw55 Acrylic Molding Compound
Categories:	Polymer; Thermoplastic; Acrylic (PMMA)
Material Notes:	The ACRYLITE® Heatresist and ACRYMID® products are crystal-clear molding compounds offering higher heat deflection temperatures under load than other grades of ACRYLITE®. ACRYLITE® Heatresist hw55: ACRYLITE® Heatresist hw55 is well suited for injection-molded technical parts that are subjected to high thermal stress. ACRYLITE® Heatresist hw55 is a copolymer based on methyl methacrylate (MMA) with co-monomer constituents. These provide a high heat deflection temperature under load for a PMMA molding compound, combined with high chemical resistance and ease of processing. Information Provided by Evonik CYRO. The former Evonik Methacrylates business has been sold to Röhm (Roehm) GmbH.
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Physical Properties	Original Value	Comments

Density	1.19 g/cc	ISO 1183
Water Absorption	0.60 %	ISO 62
Water Absorption at Saturation	2.2 %	ISO 62
Linear Mold Shrinkage	0.0020 - 0.0060 in/in	ISO 294
Melt Flow	1.2 g/10 min @Load 3.80 kg, Temperature 230 °C	ISO 1133

Mechanical Properties	Original Value	Comments
Tensile Strength at Break	80.0 MPa	5 mm/min; ISO 527
Elongation at Break	3.5 %	5 mm/min; ISO 527
Tensile Modulus	3600 MPa	1 mm/min; ISO 527
Charpy Impact Unnotched	20.0 kJ/m²	ISO 179/1eU

Thermal Properties	Original Value	Comments
CTE, linear	64.0 µin/in-°F @Temperature 0.000 - 50.0 °C	ISO 11359
Deflection Temperature at 0.46 MPa (66 psi)	109 °C	ISO 75
Deflection Temperature at 1.8 MPa (264 psi)	106 °C	ISO 75
Vicat Softening Point	120 °C	B/50°C; ISO 306
Flammability, UL94	HB @Thickness 1.60 mm	IEC 707

Optical Properties	Original Value	Comments
Refractive Index	1.51	ISO 489
Transmission, Visible	91 %	ISO 13458-2

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