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All platinum-catalyzed coatings offer fast cure at low to moderate temperatures. And, within the solventless family, there is the added advantage of being able to maximize bath life (while minimizing cure time) within defined temperature ranges. This is accomplished by inhibiting the catalyst in a controlled manner.
Compared with tin-catalyzed condensation cure, platinum-catalyzed addition-cure chemistry:
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Yields faster, more complete cure at low temperatures
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Is less prone to silicone migration
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Is non-reversible and consequently non-blocking
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In most cases, does not require post-cure, making two-sided differential release and in-line applications possible
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Generates a more durable coating with more stable and predictable release
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Offers more avenues for controlling bath life and release performance
Platinum-Catalyzed coatings have two drawbacks:
1) Susceptibility to catalyst poisoning by:
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Amines
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Sulphides
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Phosphides
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Organotin salts
2) Potential for interaction with acrylics
Platinum-Catalyzed coatings have been successfully applied to the following delivery systems:
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Solventless
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Solvent-based
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Emulsion
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