Precision Polymer Engineering Q75B Polyurethane Rubber

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Precision Polymer Engineering Q75B Polyurethane Rubber
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane, Elastomer, Unreinforced; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Sulphur cured, Polyurethane Rubber, 65-75 °IRHD. Polyester-based urethane. To meet ASTM line call-out M5BG728, B14, EO14, EO34. ASTM & ISO designation = AU. Applications: Excellent abrasion resistance and tensile strength, with fluid compatibility approaching that of NBR. Polyurethane seals provide outstanding performance in hydraulic systems, which are prone to abrasive contamination and high shock loads. Good resistance to weathering and ozone but poor against water and high temperature.
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Mechanical Properties	Original Value	Comments

Hardness, Shore A	70	°IRHD; ASTM D1415
	85	°IRHD, +15 change after 70 hours @ 100°C; ASTM D1415
Tensile Strength, Yield	22.4 MPa	-20% change after 70 hours @ 100°C; ASTM D412
	28.0 MPa	ASTM D412
Elongation at Break	240 %	-40% change after 70 hours @ 100°C; ASTM D412
	400 %	ASTM D412
Compression Set	25 % @Temperature 100 °C, Time 252000 sec	ASTM D395

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	100 °C
Minimum Service Temperature, Air	-35.0 °C	Non-brittle after 3 minutes
	-30.0 °C
Flash Point	>= 204 °C

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