Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Product Benefits
Improved Reliability
- High impact and shock resistance.
- Good gap filling properties.
- Excellent adhesion to a variety of surfaces.
- Consistent rate of cure from 60 to 100°F (16 to 38°C).
- Consistent bond strength.
Improved Processing
- Fast fixturing.
- No pot life, no mixing.
- No waste problems.
- Low toxicity.
- Low odor
- Thixotropic: facilitates dispensing/applying.
- Non-migrating on vertical surfaces.
- Increases productivity.
- Requires minimal parts cleaning.
- Easy clean-up.
Cost Effective
- Requires minimal clamping time and tooling.
- Eliminates high energy cost needed for heat cured materials.
- Eliminates need for mechanical clips.
Applications & Uses
- Markets
- Cure Method
- Typical Applications
- DC motor assembly.
- Magnet bonding.
- Bonding pre-coated sheet metal.
- Bonding ferrites, plastic, and metal wear strips.
- Bonding metals with special surface treatments such as galvanized, phosphate, and dichromate surfaces.
- Directions for Use
- For best performance bond surfaces should be clean and free from grease.
- To ensure a fast and reliable cure, Activator 56 should be applied to one of the bond surfaces and the adhesive to the other surface. Parts should be assembled within 15 minutes.
- The recommended bond line gap is 0.1mm. Where bond gaps are large (up to a maximum of 0.5 mm), or faster cure speed is required, Activator 56 should be applied to both surfaces. Parts should be assembled immediately (within 1 minute).
- Excess adhesive can be wiped away with organic solvent.
- Bond should be held clamped until adhesive has fixtured.
- Product should be allowed to develop full strength before subjecting to any service loads (typically 24 to 72 hours after assembly, depending on bond gap, materials and ambient conditions).
Properties
- Typical Curing Performance
ReAct® 727 is designed to be used with Activator 56 and cured at room temperature. Cure characteristics are measured by determining fixture time (handling time) and speed of cure.
Fixture Time
- Fixture time is defined as the time to develop a shear strength of 0.1 N/mm².
- Tested on grit-blasted steel lap-shear specimens, one side primed with Activator 56 for gap.
Gap, mm Fixture Time 0 ≤25 secs 0.1 ≤2 mins 0.25 ≤7 min 0.50 ≤25 mins Cure Speed
The graph below shows shear strength developed with time using Activator 56 on steel lap-shear specimens and tested according to ASTM D1002.
Cure Speed vs. Temperature
Heat can be used to effect or accelerate cure when surface priming operations are undesirable. Optimum conditions for heat cure should be determined on the actual assemblies.
Shear Strength Tested at RT according to ASTM D1002.
Temperature Cure Time Shear Strength N/mm² (psi) 150 ºC 3 min ≥10.3 ( ≥1500) 150 ºC 8 min ≥13.8 ( ≥2000) 120 ºC 10 min ≥10.3 ( ≥1500) - Typical Cured Performance
Shear Strength
Tested on lap-shear specimens with 1 side primed with Activator 56 and tested according to ASTM D1002.
Substrate Gap, mm Cure Time (hours) Shear Strength N/mm² (psi) G/B Steel 0 24 2500-3500 G/B Steel 0.10 24 ≥ 17.3 (2,500) G/B Steel 0.25 24 ≥13.8 (2,000) G/B Steel 0.50 24 ≥ 10.3 (1,500) G/B Aluminum 0 24 ≥ 10.3 (1,500) G/B Aluminum 0 48 ≥ 10.3 (1,800) G/B Steel 0 48 ≥ 17.3 (2,500) Zinc dichromate 0 48 ≥ 17.3 (2,500) - Typical Environmental Resistance
Lap shear Strength, ASTM D1002. Cured for 48 hours at 22ºC, Steel, with Activator 56 on 1 side.
Heat Aging
Aged 2000 hours at temperature indicated, tested at 22ºC.
Temperature, ºC Shear Strength, N/mm² (psi) 95 ≥ 17.2 N/mm² ( ≥ 2500 psi) 120 ≥ 6.9 N/mm² ( ≥ 1000 psi) 150 ≥ 3.4 N/mm² ( ≥ 500 psi) Humidity Resistance
Conditioned in 45ºC and %95 humidity for time indicated and tested at 22ºC.
Exposure Time Shear Strength, psi 4 weeks 1139 6 weeks 1013 Chemical/Solvent Resistance
Aged 720 hours at specified temperature in chemical/solvent indicated. Tested at 22ºC.
Chemical/Solvent Temperature °C Shear Strength N/mm² (psi) Air Reference 87 ≥ 20.7 ( ≥ 3000) Motor Oil 87 ≥ 20.7 ( ≥ 3000)
Regulatory & Compliance
- Certifications & Compliance
Technical Details & Test Data
- General Information
This product is not recommended for use in pure oxygen and/or oxygen rich systems and should not be selected as a sealant for chlorine or other strong oxidizing materials. For safe handling information on this product, consult the Safety Data Sheet (SDS).
Storage & Handling
- Storage
ReAct® 727 should be stored in a cool, dry location in unopened containers at a temperature between 45ºF to 85ºF (7ºC to 29ºC) unless otherwise labeled. Optimal storage is at the lower half of this temperature range. To prevent contamination of unused material, do not return any material to its original container.