Functional additives

STD620

Functional additives 2025-05-14

Product Introduction

STD620 is a two-component high-toughness low-temperature thermal conductive adhesive. Component A is a modified epoxy resin mixture, and Component B is a modified curing agent.

Characteristics & Applications

Thermal conductivity, electrical insulation, thermal shock resistance, low CTE;
Used for components requiring heat dissipation and thermal shock resistance.

Instructions

Mixing ratio (by weight): A:B = 100:8; Mixing ratio (by volume): A:B = 100:17.5. Pot life: 30 min (25°C, 100g).

Curing conditions: 25°C /24h, 45°C /6-8h, or 65°C /3h.

Mix thoroughly and degas before using liquid injection molding.

Physical and Chemical Data

Component A Appearance	Black viscous liquid
Component A Viscosity (25°C)/mPa·S	180,000-400,000
Component A Density (25°C)/(g/cm³)	2.30-2.50
Component B Appearance	Colorless or pale yellow transparent liquid
Component B Viscosity (25°C)/mPa·S	20-100
Component B Density (25°C)/(g/cm³)	0.95-1.10
Mixed Viscosity (25°C)/mPa·S	3,500-6,000
Pot Life (25°C)	>30 min
Cured Shore Hardness (40°C, 24h)	>90 HD
Cured Density (g/cm³)	2.2-2.4
Glass Transition Temperature (°C)	45-75°C

*The above data reflect typical product properties and should not be interpreted as specifications.

Packaging

Component A: 4kg/drum; Component B: 320g/bottle

Storage Conditions & Shelf Life

Store in a cool, airtight environment. Shelf life: 12 months.

Personal Protection

Personal Protective Equipment	Impermeable gloves to avoid skin contact.
Respiratory Protection	No special protection required.
Eye Protection	Chemical splash goggles recommended.
Body Protection	Wear protective clothing resistant to this product. Equip with boots, gloves, eyewash stations, and emergency showers as needed.