ALPHA SM42-1311
Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium
Main features
- High-Speed Room-Temperature Dispensing
- 80-Second Cure at 150 deg C
- Non-Sagging Epoxy Paste
Product Description
ALPHA SM42-1311 SMD Adhesive is a one-component, fast-curing red epoxy paste for high-speed dispensing and surface-mount component attachment. Its non-sagging rheology and thixotropic index of at least 5.0 support controlled dot formation at room temperature. The adhesive develops full properties after a minimum 120 seconds at 120 deg C or 80 seconds at 150 deg C in a convection oven. Typical uncured data include 350 to 550 Poise viscosity at 25 deg C and 1.1 to 1.3 specific gravity. Documented cured properties include at least 90 deg C glass-transition temperature, less than 1.0% moisture absorption, and greater than 1 x 10^12 ohm insulation resistance under the stated test conditions.
Key features
- High-speed dispensing: Designed for room-temperature dispensing in surface-mount assembly.
- Short heat-cure options: Full property development at 120 deg C for 120 seconds or 150 deg C for 80 seconds minimum.
- Non-sagging epoxy paste: A thixotropic index of at least 5.0 supports controlled placement.
Applications
Dispensed surface-mount component attachment in electronics assembly.
TDS, SDS & Technical Documents
Technical Specifications
Physical Properties
General Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Chemistry | Epoxy | Uncured material | |
| Appearance | Red paste | Uncured material | |
| Viscosity | 350 to 550 | Poise | Malcom PC-10A, 30 rpm, 25 deg C |
| Specific gravity | 1.1 to 1.3 | Typical uncured value | |
| Thixotropic index | >= 5.0 | Tentative specification | |
| Pot life | 7 | days | 25 deg C |
| Shelf life | 6 | months | 1 to 10 deg C |
| Shelf life | 14 | days | 25 deg C |
After-processing / final-state properties
Typical cured-material values; cure basis is at least 120 seconds at 120 deg C or 80 seconds at 150 deg C in a convection oven.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Glass-transition temperature | >= 90 | deg C | TMA |
| CTE alpha1 | 60 +/- 10 | ppm | Below Tg; TMA |
| CTE alpha2 | 190 +/- 20 | ppm | Above Tg; TMA |
| Corrosion | None | 96 hours at 40 deg C and 95% RH | |
| Moisture absorption | < 1.0 | % by weight | 24 hours in water at 25 deg C |
| Insulation resistance | > 1 x 10^12 | ohm | 96 hours at 85 deg C and 85% RH |
| Hardness | 80 to 90 | Shore D | Typical cured value |
