Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Product Highlights
- A series of color masterbatches consisting of pigments dispersed in a vinyldimethyl-terminated polydimethylsiloxane polymer
- Consistency of a low viscosity paste
- Supported by USP Class VI and ISO 10993 Biological testing (reference Biological Testing Data Table)
Applications & Uses
- Markets
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
- Applications
- For easy and more precise pigmentation of LSR and low consistency materials, which may be injection molded
- Eliminates use of powders that may contaminate clean room environments
- Reduces production time
- Strict quality controls ensure color consistency
- Homogeneity of masterbatch minimizes agglomerates
- Instructions for Use
If using as a dispersion, use mild mixing to disperse Part A in solvent at a higher concentration than the final desired concentration. Use aromatic or aliphatic solvents such as hexane, toluene, or xylene to prepare the dispersion. In addition to solubility, take into account flammability and toxicity when choosing a solvent. A typical solids concentration is 15% by weight. The user should determine the specific solvent and solids concentration to obtain optimum results.
Note: When using any solvent, always provide adequate ventilation and avoid eye and skin contact. Follow manufacturer’s label instructions and refer to appropriate MSDS.
Disperse Part A of MED-2045 as follows:
- Soften the elastomer on a mill. Sheet the elastomer off the mill and cut into small pieces.
- Place the elastomer in a suitable mixing container and add just enough solvent to cover it completely. Cover the container and let it stand overnight at room temperature.
- Stir the resulting mass with a propeller-type mixer until a uniform consistency is obtained.
- When thoroughly dispersed, add solvent in small amounts, stirring thoroughly after each addition until the desired concentration or viscosity is obtained.
For optimum dispersion working time, add 0.16 parts by weight of Part C to 100 parts of Part A and mix thoroughly. Add 0.7 parts by weight of Part B to 100 parts of part A. Mix thoroughly to avoid localized concentrations. The work time of the mixture will depend on the solvent, solids content, temperature and storage conditions. When properly stored, a usable life of three months from the date of mixing is typical.
Appropriately filter the dispersion before use for best results. Always thoroughly mix the dispersion before use and take care to avoid solvent evaporation and air entrapment.
The part being coated with the dispersion should be free of contamination, should not inhibit the cure, and should be able to withstand the cure cycle. Apply the dispersion by brushing, spraying or dipping. Control thickness by building up successive coats (1 to 2 mil). Allow the bulk of the solvent to evaporate between coats. When the desired thickness is obtained, set the mold or mandrel aside and allow the solvent to completely evaporate. Then cure in an air-circulating oven at a temperature not exceeding 210°C (410°F). The cure time will depend upon the oven temperature and the film thickness. The user must establish the cure cycle for a specific application (use 15 minutes at 160°C (320°F) as a starting point). The elastomer may be post-cured to stabilize and enhance physical properties.
Cure Inhibition
MED-2045 cures in contact with most materials. Exceptions include: butyl, latex, chlorinated rubbers, some RTV silicones and unreacted residues of some curing agents.
Flammability
Observe adequate precautions when handling and storing Part C due to its volatility and flammability. Avoid prolonged breathing of vapors and contact with the eyes. When handling Part C, it is advisable to wear chemical splash goggles since the material can cause burns to the eyes if direct contact occurs.
Combustibility
Part B is combustible and should be stored in accordance with the instructions on the label.
Properties
- Appearance
- Translucent
- Typical Properties
- Cured Properties
| Value | Units | Test Method / Conditions | |
| Durometer Type A | 40.0 | — | — |
| Tensile | 1,500 (10.34 ) | psi (MPa) | — |
| Elongat ion | 800.0 | % | — |
| Tear | 200 (35.27 ) | ppi (kN/m) | — |
| Mix Rat io | 100:0.7:0.16 | — | — |
| Specific Gravity | 1.16 | — | — |
| Stress at Strain 200 % | 200 (1.38) | psi (MPa) | — |
| Value | Units | Test Method / Conditions | |
| Cure at 171 °C | 10.0 | minutes | — |
| Cure Rat e Scorch | 0.7 | minutes | — |
| Cure Rat e T90 | 2.35 | minutes | — |
| Cure System | Platinum | — | — |
| Post Cure at 148°C | 2.0 | hours | — |
Packaging & Availability
- Country Availability
- Regional Availability