Polyurethane Resins Encapsulant for Electronic Components

• Molecular Principal Chain: Carbon Chain Polymer
• Color: Black
• Appearance: Black Liquid
• Viscosity: 800-1800
• Bubble Experiment: Bubbles Burst out in 5-9 Min
• Available Time: Greater Than or Equal to 10
• Model NO.: WD090300A
• Curing Time: 25ºC2-24h
• Cured Performance: Even, Smooth, No Bubbles
• Hardness: 55 ± 10
• Tensile Strength: >1.0
• Elongation at Break(%): Greater Than or Equal to 150
• Linear Expansion Coefficient: Less Than or Equal to 220
• Thermal Conductivity: Greater Than or Equal to 0.45
• Water Absorption: Less Than or Equal to 0.1
• Insulation Strength: Greater Than or Equal to 18
• Volume Resistivity: >1.0X1011
• Surface Resistivity: >1.0X1010
• Transport Package: Barrel
• Specification: 25kg, or customized available
• Trademark: SWETE
• Origin: China
• Production Capacity: 50000tons Per Year

Product Description

Excellent comprehensive characteristics, such as small shrinkage and residual stress during curing, good elasticity, toughness, excellent electrical properties, no deformation, no corrosion, excellent permeability, no cracking during cold and hot cycles, etc. It is suitable for encapsulating various electronic components.


Uses
It is suitable for automobile electrical appliances, motorcycle electrical appliances, relays, water heater control boards, electric vehicle controllers, circuit boards, various electronic components, power modules, inverters, filters, arrester modules, etc.



Characteristics
It has excellent comprehensive characteristics, such as small shrinkage and residual stress during curing, good elasticity, toughness, excellent electrical properties, no deformation, no corrosion, excellent permeability, no cracking during cold and hot cycles, etc. It is suitable for encapsulating various electronic components.
 

 

Item Index Model		WD090300A	WD090300B	WD0903001A	WD0903001B
Before curing	Appearance	Black Liquid	Yellow-brown liquid	Black Liquid	Yellow-brown liquid
	Viscosity  (40ºC, mPa.s)	800-1800	20-85	800-1800	20-150
	Bubble experiment	bubbles burst out in 5-9 min
	Available time (25ºC, min)	≥10
	Gel time (150ºC, s)	Negotiate		Negotiate
After curing	Physical Properties
	Curing time	25ºC2-24h
	Performance of curing samples	Even, smooth, no bubbles
	Hardness (shore A)	55±10		50±10
	Tensile strength (Mpa)	>1.0		>1.0
	Elongation at break (%)	≥150		≥150
	Linear Expansion Coefficient(ppm/ºC)	≤220		≤220
	Thermal Conductivity (W/m.K)	≥0.45		≥0.45
	Water Absorption ( 23ºC24h,%)	≤0.1		≤0.1
	Flame-retardant (UL-94)	Negotiate		Negotiate
	Electrical Properties
	Insulation Strength (KV/mm)	≥18		≥18
	Volume Resistivity (Ω/cm)	>1.0x10^11		>1.0x10^11
	Surface resistivity (Ω/cm)	>1.0x10^10		>1.0x10^10

Ratio
100:13-20





Package
Part A: 25kg /barrel
Part B: 10kg /barrel



Storage Conditions

The product should be sealed in its original packaging container and stored in a dry and ventilated place. In an environment of 18-40ºC, the shelf life is 6 months. If the shelf life is exceeded, analysis is required to determine whether it is still valid.


Due to the storage conditions, this product may experience a small amount of precipitation during storage, which is a normal phenomenon. After stirring evenly, it can be used normally.