Heat Resistant Coatings

Heat Resistant Coatings

Pure silicone is not often used as paint, but modified silicone resins with modifying agents such as alkyd, epoxy, phenolic, acrylic, melamine resins are used.

Silicone resin paints are well known for the excellent heat resistance, cold resistance, chemical resistance, weatherability and electrical insulation properties.

Pure silicone resin paints are polymers with methyl and phenyl groups, with heat resistance of 200~250℃. With increased amounts of methyl group, the flexibility and water repellence will increase, but the heat resistance will decrease.

The modified silicone resins are of modified with alkyd resin, polyester resin, epoxy resin, acrylic resin, etc. with heat resistance to 150~200℃.

Inorganic filler added silicone resin paints have resistant pigments, aluminium powder, graphite, or a ceramic powder as the additives, with high heat resistance of 300~650℃.

Uses

Primary uses for the silicone resin paints are as heat resistant paints and are used to coat factory stacks, engines, boilers, hot blast furnaces, motors, generators, exhausts or heat absorbing tubes, reaction vessel inner surfaces at chemical plants, etc.

Our preferred supplier is PPG Protective and Marine Coatings.

For service under insulation, a single-component product like the PPG HI-TEMP 1027™ coating can be used for a wide range of operating temperatures and provides excellent protection against corrosion under insulation (CUI). In areas where insulation is not required, a two-coat system consisting of a primer and silicone topcoat is recommended.

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