ELASTOSIL® COLOR PASTE PT UNIVERSAL BLACK
ELASTOSIL® COLOR PASTE PT UNIVERSAL BLACK is a ready-to-use compound comprising specific color pigments and a reactive silicone polymer which is commonly used in ELASTOSIL® high-consistency silicone rubber.
This ensures a homogeneous covulcanization of the color paste without interference of the physical properties (e.g. hardness) and without migration as observed with silicone oil.
ELASTOSIL® COLOR PASTE PT UNIVERSAL BLACK is ready-to-use and can be easily incorporated on an open roll mill or kneader. ELASTOSIL® Color Pastes PT can be blended with each other to achieve a desired custom color tone.
ELASTOSIL® COLOR PASTE PT UNIVERSAL BLACK is generally resistant to sunlight, UV and hot air. For further requirements the resistance should be checked in each individual case.
If the dosage recommendations are followed, the mechanical properties of the colored vulcanizates will not be impaired.
Specific features of ELASTOSIL® COLOR PASTE PT UNIVERSAL BLACK
ELASTOSIL® COLOR PASTE PT UNIVERSAL BLACK has been developed particularly for coloring ELASTOSIL® R and ELASTOSIL® R plus high consistency silicone rubber.
ELASTOSIL® Color Paste PT universal black is compatible with Curing Agents C1, C6, and E for peroxide curing ELASTOSIL® R grades and is also fully compatible with addition curing ELASTOSIL® R plus grades. Please be aware, there are some hints that ready-to-use compounds with Curing Agent E and ELASTOSIL® Color Paste PT universal black may have a limited shelf life in some cases.
Incorporation into ELASTOSIL® R and ELASTOSIL® R plus grades is best performed on an open roll mill. Preferably, the curing agent is incorporated at the same time. The color paste is homogeneously dispersed when the rubber stock has a uniform color. Customers may produce other colors by mixing the pigment pastes. Suggestions for formulations can be made on request.
A dosage of 1% ELASTOSIL® Color Paste PT is generally recommended to obtain opaque vulcanisates. For the manufacture of thin-walled parts and for rubber grades containing non-reinforcing fillers (e.g. quartz, diatomaceous earth) or colored additives (e.g. ELASTOSIL® AUX Stabilizer R, ELASTOSIL® AUX Batch SB 2) an increase of the dosage to 2 - 3% will be useful. The concentration should be kept at a minimum. In individual cases an excess of color paste may slow down the curing characteristics.
This product is available in 20 kg cardboard packaging and 1 kg tin.
Please store the cardboard boxes in a dry and cool place. Already opened boxes should be closed again to avoid any contamination.
The 'Best use before end' date of each batch is shown on the product label.
Storage beyond the date specified on the label does not necessarily mean that the product is no longer usable.
In this case however, the properties required for the intended use must be checked for quality assurance reasons.