Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Specific Features
- Addition Curing
- BfR compliant
- FDA compliant
- Flowable
- Food-contact
- Low viscosity
- No chemical shrinkage
- Two-component
Applications & Uses
- Cure Method
- Applications
Elastomers for Pad Printing.
- Application Details
Base rubber for making printing pads.
Processing
The platinum catalyst is in component B. A and B components may only be used together if they have the same batch number. To ensure optimum flow of the material, the components must be stirred thoroughly before they are removed or processed in their containers.
Properties
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Very good flow
- High reactivity for fast demolding even if large amounts of silicone fluid are added
- Fast and non-shrink cure at room temperature which can be accelerated considerably by the application of heat
- Very low hardness (Shore A approx. 17)
- High tear strength
- Translucent when cured, any color possible by adding a Wacker Pigment Paste FL
- Note
Cured Properties: After 24 hours at 23°C.
- Dilution Charts
The following table shows the hardness of ELASTOSIL® RT 620 A/B as a function of the added amount of Wacker Silicone Fluid AK 35 for Durometer Types Shore A and Shore 00.
Hardness Shore A/Shore 00
Added amount of Wacker Silicone Fluid AK 35 [wt %] 0 20 40 50 60 70 Shore A 17 8 4 4 1 0 Shore 00 71 61 50 45 40 35 
| Value | Units | Test Method / Conditions | |
| Curing Time (A+B, tack-free) | 4 | hours | — |
| Dynamic Viscosity (A+B, at 23°C) | 6000 | mPa·s | ISO 3219 |
| Mix Ratio (A:B) | 10:1 | parts by weight | — |
| Pot Life (A+B, at 23°C, 60000 mPa·s) | 35 | minutes | DIN EN ISO 2555 |
| Value | Units | Test Method / Conditions | |
| Density (in water, at 23°C) | 1.05 | g/cm³ | DIN EN ISO 1183-1 A |
| Elongation (at break) | 900 | % | ISO 37 Type 1 |
| Linear Shrinkage | max. 0.1 | % | — |
| Shore Hardness A | 17 | — | DIN ISO 48-4 |
| Tear Strength | min. 12 | N/mm | ASTM D 624 B |
| Tensile Strength | 5 | N/mm² | ISO 37 Type 1 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C, Componenet A) | 1.06 | g/cm³ | DIN EN ISO 2811-1 |
| Density (at 23°C, Componenet B) | 0.98 | g/cm³ | DIN EN ISO 2811-1 |
| Dynamic Viscosity (Component A, at 23°C) | 7000 | mPa·s | ISO 3219 |
| Dynamic Viscosity (Component B, at 23°C) | 1200 | mPa·s | ISO 3219 |
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Safety Notes
Components of the addition-curing grade ELASTOSIL® RT 620 A/B contain only constituents that over many years have proved to be neither toxic nor aggressive. Special handling precautions are therefore not required, i.e., only the general industrial hygiene regulations apply.
Packaging & Availability
- Country Availability
- Regional Availability