High Heat Stable Brown Oxides

Resilience in the Face of Heat

At Deqing Demi Pigment Technology Co., Ltd., we solve the thermal limitations of inorganic color. We recognize that modern manufacturing often requires pigments to survive extreme processing temperatures. Our high-heat brown series is the result of years of R&D in crystal lattice stabilization. We provide the "Thermal Security" that allows our clients to produce high-end polymers and coatings without the risk of "browning-out" or shade drift during the heating cycle.

High-Heat Usage Areas

• Plastic Masterbatch: Consistent brown for PA, ABS, and high-temp PE resins.
• Powder Coatings: Heat-stable brown for metal furniture and automotive parts.
• Coil Coatings: Durable brown for metal siding and roofing.
• Silicone Rubber: High-temp stable coloring for industrial seals and gaskets.

Thermal Grade Technical Specs

Performance Features

• Color Retention: Zero shift toward red or black during high-heat processing.
• Low Volatility: Ultra-dry pigment prevents "silver-streaking" in molded plastics.
• Excellent Hiding: Total opacity in thin-film coating and plastic applications.
• Chemical Inertness: Does not catalyze polymer degradation at high temperatures.

• Q: Why does regular brown oxide fail in plastic extrusion?

  A: Standard browns contain hydrated yellow oxide (α-FeOOH), which loses its water molecule and turns red at approx 180∘C.

• Q: What is the maximum stable temperature of this grade?

  A: Our high-heat stable series is rated for 260∘C (and up to 300∘C for specific grades).

Thermal Performance Audits

We provide "Time-Temperature Gradient Reports," showing exactly how the brown shade behaves across your specific processing window.

Custom Doping: We can adjust the Manganese/Iron ratio to provide specific brown undertones (Cool vs. Warm) while maintaining heat stability.

The Science of Lattice Locking

Heat-stable browns achieve their performance through "Lattice Locking." In standard yellow oxide, the hydroxide groups are loosely bound. We replace these groups with more thermally stable ions or utilize "Calcined Ferrites" (Magnesium or Manganese Ferrites). These crystals are formed at temperatures above 800∘C, meaning they are inherently stable and physically cannot "dehydrate" during your plastic or coating process. This scientific approach turns the pigment into a "Ceramic-Like" colorant that is virtually indestructible by heat.