Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
Features & Benefits
Applications & Uses
- Applications
- Application Area
- Cure Method
- Applications
- Sealing adhesive for electronic control units
- FIPG applications for plastic and metal housings
- Dam material for dam-and-fill applications
- Sealing and gasketing of housings
- Processing
General Considerations
ELASTOSIL® 722 RB A/B shows good primerless adhesion to many substrates. We recommend running preliminary tests to optimize conditions for the particular application.
Substrate Surface
- All equipment and surfaces must be clean and free of contaminants that will prevent adhesion and/or inhibit the cure of ELASTOSIL® 722 RB A/B
- Separation layers on bonding substrated may be formed from residues of previous processes, from migrating additives or unintended contaminations.
- Examples of separating molecules among others can be processing fluids or deforming agents that are not able to built chemical links to reactive and accessible anchor groups of the substrate surface or to the silicone elastomer.
- Examples of inhibiting contaminants are sulfur containing materials, plasticizers, urethanes, amine containing materials and organometallic compounds – especially organotin compounds.
- If a substrate’s ability to inhibit cure or built up adhesion is unknown, a small scale test should be run to determine compatibility.
- ELASTOSIL® 722 RB A/B shows good primerless adhesion to many substrates.
- We recommend to run preliminary tests to optimize conditions for the particular application. Safeguarding of reproducable and suitable surface quality is recommended.
- State of the art methods include in-line surface pretreatments like plasma processes or laser pretreatment.
Dispensing
Because of the high thixotropy (shear thinning effect) ELASTOSIL® 722 RB A/B can be dispensed easily with all dispensing equipments using static mixing tubes or dynamic mixing. Since silicones dissolve notable amounts of air, an in-line degassing is recommended.
Curing
ELASTOSIL® 722 RB A/B works best when cured at 115 °C or more. Curing time should be adapted to the size and heat sink properties of the components and parts. The term "curing" time describes the time needed for solidification of the material. For typical substrates adhesion built-up is accomplished within this time, which can be observed by cohesive failure upon adhesion test. However, depending on the surface quality of the bonding surfaces, time to adhesion might differ from given curing profiles. In the interest of robust processing it is highly recommended that for selected curing temperatures & times aging tests on specific customers parts are carried out to safeguard the process.
Properties
- Physical Form
- Typical Properties
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Fast curing at moderate temperature
- Thixotropic, pasty
- Medium hardness
- Primerless adhesion on many substrates
- High tensile strength and high elongation
- D4-D8 < 350ppm
| Value | Units | Test Method / Conditions | |
| Catalyst in Component A | Platinum | — | — |
| Mixing Ratio (Parts by weight, A:B) | 1:1 | — | — |
| Value | Units | Test Method / Conditions | |
| Dynamic Viscosity (A+B, at 25°C, Shear rate 0.5 s⁻¹) | 300000 | mPa·s | DIN EN ISO 3219 |
| Dynamic Viscosity (A+B, at 25°C, Shear rate 25 s⁻¹) | 35000 | mPa·s | DIN EN ISO 3219 |
| Kick-Off Temperature (A+B, Torque Measurement, 10 K/min, onset 4%) | 85 | °C | ISO 6502 |
| Mix Ratio (A:B) | 1:1 | parts by weight | — |
| Pot Life (A+B) | min. 6 | hours | DIN EN ISO 3219 |
| Value | Units | Test Method / Conditions | |
| Curing Time (at 100°C, 2 mm thickness) | 30 | min | — |
| Curing Time (at 125°C, 2 mm thickness) | 15 | min | — |
| Curing Time (at 90°C, 2 mm thickness) | 45 | min | — |
| Pot life (at 23°C) | 6h | — | — |
| Adhesive Lap-Shear Bond Strength (AlMgCu 2pl (pickled); ULTRADUR BG 4300 GF 30, at 0.2mm, 75 min, 115 °C) | 4 | N/mm² | DIN EN 1465 |
| Adhesive Lap-Shear Bond Strength (AlMgCu 2pl, pickled, at 0.2mm, 115°C, 75 min ) | 4 | N/mm² | DIN EN 1465 |
| Density (at 23°C) | 1.1 | g/cm³ | DIN EN ISO 2811-2 |
| Elongation (at break, 2mm film) | 300 | % | ISO 37 - S2 |
| Modulus (at 100 % elongation) | 2 | N/mm² | ISO 37 |
| Shore Hardness A (from 6 mm plate, pressed at 165°C,15 min) | 45 | — | DIN ISO 48-4 |
| Tensile Strength (2mm film, pressed sheet, at 165°C, 15 min) | 6 | N/mm² | ISO 37 - S2 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C, Componenet A) | 1.1 | g/cm³ | DIN EN ISO 1183-1 A |
| Density (at 23°C, Componenet B) | 1.1 | g/cm³ | DIN EN ISO 1183-1 A |
| Dynamic Viscosity (Component A, at 25°C, Shear rate 0.5 s⁻¹) | 300000 | mPa·s | DIN EN ISO 3219 |
| Dynamic Viscosity (Component A, at 25°C, Shear rate 25 s⁻¹) | 35000 | mPa·s | DIN EN ISO 3219 |
| Dynamic Viscosity (Component B, at 25°C, Shear rate 0.5 s⁻¹) | 250000 | mPa·s | DIN EN ISO 3219 |
| Dynamic Viscosity (Component B, at 25°C, Shear rate 25 s⁻¹) | 35000 | mPa·s | DIN EN ISO 3219 |
| Platinum Catalyst in Component | Component A | — | — |
| Platinum Catalyst in Component | Component B | — | — |
Regulatory & Compliance
- Certifications & Compliance
Packaging & Availability
- Country Availability
- Regional Availability