Acid-resistant coated pigments
A pigment, coating technology, applied in the direction of coating, fibrous filler, etc., can solve problems such as burns
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[0026] 1. Method for producing pigments coated by an acid-resistant method
[0027] Reaction mixture No. 1 consisting of 5 kg of Bayferrox 120 (uncoated ferric oxide) and 0.5 kg of pentaerythritol powder was introduced into a vacuum pressure intensive heating mixer (inhouse construction). The reaction mixture of No. 1 was heated to 250° C. under a pressure of 1 mbar with a centralized mixing box. After a reaction time of 15 minutes, it was ventilated and cooled. The sample taken out is No. 1 paint applied in an acid-resistant way.
[0028] Do the same for the following paints that are applied by acid-resistant means:
[0029] The reaction mixture of No. 2 composed of 2 kg of Bayferrox 420 (uncoated ferric oxyhydroxide) and 0.2 kg of pentaerythritol is used to prepare the pigment coated with acid-resistant method of No. 2;
[0030] The reaction mixture of No. 3 composed of 2 kg of Bayferrox 3950 (uncoated zinc iron spinel with zinc ferrite composition) and 0.2 kg of pentaery...
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