Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Product Type
- Technologies
- Product Families
Features & Benefits
- Ready-to-Use Product Features
- Product Highlights
- Two-part silicone dispersion
- Cures via addition-cure chemistry
- 1:1 Mix Ratio (Part A: Part B)
Applications & Uses
- Markets
- Application Area
- Application Method
- Cure Method
- Plastics & Elastomers End Uses
- Applications
- Suitable for dip casting and heat-curing of thin elastomeric films
- Low viscosity makes dispersions ideal for use as sprayable coatings
- Instructions for Use
Mixing
For two-part, platinum catalyzed dispersions, mixing Part A into Part B (instead of Part B into Part A) is important especially when using a dispersion with high solids content. Thoroughly stir individual components prior to addition to ensure homogeneity. Mix in a 1:1 ratio by weight. Do not use wooden spatulas to mix and avoid the use of latex gloves. Exercise care to prevent solvent loss during deairing. Accomplish additional dilution for thin film applications by adding appropriate solvent. Mixer design/size/type, blade/propeller type, shear/RPM levels, and heat generated during mixing, are important parameters and should be addressed in order to have an adequately mixed dispersion.
Please note the Part A may shear thicken when pre-mixed. This is an expected behavior and an inherent property of the dispersion. Once the Part A and Part B are homogenized, allow the blended material to rest and/or de-air prior to further processing, which will allow the dispersion to return to a nonthickened state. Warning: Consult the MSDS for MED10-6640 prior to use, as its solvent carrier is hazardous.
Vacuum
Remove air entrapped during mixing by common vacuum deaeration procedure, observing all applicable safety precautions. Slowly apply full vacuum to a suitable container of at least four times the volume of material being de-aired. Hold vacuum until bulk deaeration is complete.
Substrate Considerations
Cures in contact with most materials common to biomedical assemblies. Exceptions include: sulfur-cured organic rubbers, latex, chlorinated rubbers, some RTV silicones and unreacted residues of some curing agents.
Coating and Use
Dispersions are more commonly used in dip molding processes, but can also be sprayed or cast. Make sure to apply under a fume hood or in a well ventilated environment. Care should be taken before placing coated mandrels or parts in oven due to the presence of solvent.
Properties
- Physical Form
- Appearance
- Translucent
- Typical Properties
- Cured Properties
| Value | Units | Test Method / Conditions | |
| Viscosity | 2,500 (2,500 ) | cP (Mpa*s) | — |
| Non Volat ile Content | 20.0 | % | — |
| Durometer Type A | 40.0 | — | — |
| Elongat ion | 1000.0 | % | — |
| Mix Rat io | 0.042361111 | — | — |
| Refractive Index | 1.41 | — | — |
| Solvent | Xylene | — | — |
| Stress at Strain 100 % | 150 (1.03) | psi (MPa) | — |
| Tear | 300 (52.91 ) | ppi (kN/m) | — |
| Tensile | 1,700 (11.72 ) | psi (MPa) | — |
| Value | Units | Test Method / Conditions | |
| Cure System | Platinum | — | — |
| Cure at 25 °C | 30.0 | minutes | — |
| Cure at 75 °C | 40.0 | minutes | — |
| Cure at 150 °C | 135.0 | minutes | — |
Packaging & Availability
- Country Availability
- Regional Availability
Storage & Handling
- Storage and Handling
Most dispersions are stored prior to application. It is important to note that NuSil recommends keeping the dispersion in its original container when possible, tightly sealed and stored below 40º C. Care should be taken to prevent solvent evaporation and contamination during long or short term storage.