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TR-902 is an ortho benzene type unsaturated polyester resin with high reactivity, medium viscosity, and good thickening stability. Its products have good heat resistance and excellent comprehensive mechanical properties. Used for producing SMC/BMC products such as electrical, industrial equipment, and automotive components.

2.Technical specifications of liquid resin (25 ℃)

Item	Test method	Performance index	Result
Apperance	GB/T 8237 2005	Yellow transparent liquid	Yellow transparent liquid
Acid value (mgKOH/g)	GB/T 2895 2008	15.0-20.0	15.7
Viscosity (CP · S)	GB/T 7193 2008	1200-1800	1500
SPI-GT (min)	GT/T 7193 2008	6.0-10.0	6.6
SPI-CT (min)	GT/T 7193 2008	7.5-12.5	8.2
SPI-PET (℃)	GB/T 7193 2008	220.0-245.0	229.5
Solid content (%)	GB/T 7193 2008	63.5-66.5	66.4
Color number	GB/T 605	≤140	70
Conclusion	PASS

3.Physical properties of the casting body (for reference only)

Item	Unit	Measured value	Test method
Tensile strength	MPa	65	GB/T 2568
Tensile modulus of elasticity	Mpa	3000	GB/T 2568
Elongation	%	2.5	GB/T 2568
Bending strength	MPa	110	GB/T 2570
Flexural modulus	MPa	3300	GB/T 2570
Heat distortion temperature	℃	122	GB/T 1634
Barcol hardness	---	47	GB/T 3854

Note:

1) The production method of the casting body shall be in accordance with GB/T 8237, and the curing system shall be 0.6% Co Naph1% AKZOM-501%;

2) Post treatment of casting body: room temperature x24 hours 60Cx3 hours+110Cx2 hours.

4、 Precautions

During transportation, it should comply with the safety regulations for the transportation of hazardous chemicals in Chapter 5 of the State Council's Regulations on the Safety Management of Hazardous Chemicals. The product should be stored in a cool place below 25C, avoiding ignition, isolating heat sources, and sealed to prevent moisture intrusion and monomer evaporation. The shelf life for storage below 25C is 3 months.