Heat-stability coatings

Waterborne Fire-Protective and Heat-Stability Coating Compositions... 

Silicone polymers having high heat stability and excellent chemical resistance are available. They are very expensive and hence are not commonly found in paint coatings. 

The fact that P.Y.127 recrystallizes only very slightly facilitates its dispersion in modern agitated ball mills. The pigment is easy to disperse and its heat stability parallels that of P.Y.13. Its fastness to clear lacquer coatings and to sterilization are excellent, which is why the pigment is suitable for metal deco printing. 

In applications where the pigment is fast enough to solvents to satisfy the requirements, it may also be used for offset, packaging gravure, and flexo printing inks. The resulting prints are soap, alkali, and acid resistant. They are not completely fast to paraffin and quite sensitive to butter and a number of other fats. P.R.14 prints are not fast to clear lacquer coatings and may not be sterilized. Heat stabil-... 

P.O.72 is as well suitable for the application in polystyrene and ABS. Colorations of PS in 1/3 SD, requiring only 0.15% pigment, exhibit a heat stability of 280°C, colorations of ABS are stable up to 290°C. In these media the lightfastness equals step 8 on the Blue Scale. Pigment concentration of less than 0.1% in poly-oxymethylen (POM, polyacetales) may lead to coating of the manufacturing equipment (see plate out, Sec. 1.6.4.1). 

The list of suitable applications also includes a variety of special-purpose systems, especially where high lightfastness and durability, but also high heat stability or other perfect fastness properties are a prime concern. This is true, for instance, for coatings to be applied onto aluminum window blinds. Bilaterally coated, usually in pastel colors, these aluminum strips are baked at 250°C or less and subsequently subjected to considerable mechanical stress. 

B-80MI11511 Technical Bulletin, Light and Heat Stabilization of Coatings , Ciba-Geigy Corp.,... 

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