Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Materials Features
- Specific Features
- Addition Curing
- Antistatic
- Fast curing at room temperature
- Flowable
- Low viscosity
- No chemical shrinkage
- Two-component
Applications & Uses
- Cure Method
- Applications
Making antistatic printing pads.
- Application Details
Base rubber for making printing pads. A special feature of ELASTOSIL® RT 629 A/B is that it contains an antistatic additive for fast dissipation of static charge that has built up on the pad surface. The vulcanizate’s high mechanical strength and long term stability of hardness make ELASTOSIL® RT 629 A/B an ideal base material for producing antistatic printing pads with excellent mechanical properties and long service life.
Processing
The platinum catalyst is in component B. A and B components may only be used together if they have the same batch number.
Properties
- Catalyst Properties
- Cured Properties
- Uncured Properties
- Properties
- Antistatic finish
- 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
- Medium hardness (Shore A approx. 31)
- Excellent mechanical properties
- Note
Cured Properties: After 24 hours at 23°C.
- Dilution Charts
The following tables show the hardness of ELASTOSIL® RT 629 A/B as a function of the added amount of Wacker Silicone Fluid AK 35 for Durometer Types Shore A and Shore 00.
Added amount of Wacker Silicone Fluid AK 35 [wt %] 0 10 20 30 40 50 Shore A 31 24 19 16 12 9 Shore 00 80 75 71 66 63 58 
| Value | Units | Test Method / Conditions | |
| Curing Time (A+B, tack-free) | 3 | hours | — |
| Dynamic Viscosity (A+B, at 23°C) | 8000 | mPa·s | ISO 3219 |
| Mix Ratio (A:B) | 10:1 | parts by weight | — |
| Pot Life (A+B, up to 60,000 mPa.s) | 40 | minutes | DIN EN ISO 2555 |
| Value | Units | Test Method / Conditions | |
| Density (in water, at 23°C) | 1.13 | g/cm³ | DIN EN ISO 1183-1 A |
| Elongation (at break) | 500 | % | ISO 37 Type 1 |
| Linear Shrinkage | max. 0.1 | % | — |
| Shore Hardness A | 31 | — | DIN ISO 48-4 |
| Tear Strength | 25 | N/mm | ASTM D 624 B |
| Tensile Strength | 6 | N/mm² | ISO 37 Type 1 |
| Value | Units | Test Method / Conditions | |
| Density (at 23°C, Componenet A) | 1.14 | g/cm³ | DIN EN ISO 2811-1 |
| Density (at 23°C, Componenet B) | 0.99 | g/cm³ | DIN EN ISO 2811-1 |
| Dynamic Viscosity (Component A, at 23°C, after stirring) | 14000 | mPa·s | ISO 3219 |
| Dynamic Viscosity (Component B, at 23°C, after stirring) | 900 | mPa·s | ISO 3219 |
Regulatory & Compliance
- Certifications & Compliance
Safety & Health
- Safety Notes
Components of the addition-curing grade ELASTOSIL® RT 629 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