Preparation of Titanium Phosphates with Sodium Triphosphate in Hydrothermal Process and Their Powder Properties for Cosmetics

Abstract

As a white pigment, titanium oxide is used for cosmetic application. This oxide is well known to have the photo catalytic activity. Therefore, a certain degree of sebum on the skin is decomposed by the ultraviolet radiation in sunlight. In this work, titanium phosphates were prepared with titanium chloride and sodium triphosphate in hydrothermal process as a novel white pigment. Their chemical composition, powder properties, photo catalytic activity, color phase, and smoothness were studied. The obtained phosphates had little photo catalytic activity. The particle size of phosphate pigments consisted of a normal distribution at 2 µm by the hydrothermal treatment for 4 and 8 hours. The slipping resistance of samples became small by the hydrothermal treatment.

Surface Modification of Titanium Dioxide for Nobel White Pigment With Condensed Phosphoric Acid Treatment

“…14 In order to synthesize sodium triphosphate (Na5P3O10) a mixture of disodium hydrogen phosphate (Na2HPO4) and sodium dihydrogen phosphate (NaH2PO4) with a Na2HPO4/NaH2PO4 ratio of 2/1 was heated at 400 ºC for 5 h. 15 These condensed phosphates were formed according to the following equations:…”

Influence of phosphate source on preparation of zinc phosphate white pigments

“…Sodium pyrophosphate, Na 4 P 2 O 7 , was synthesized by heating di-sodium hydrogen phosphate (Na 2 HPO 4 ) at 400°C for 5 h [15]. Sodium triphosphate (Na 5 P 3 O 10 ) was synthesized by heating a mixture of disodium hydrogen phosphate (Na 2 HPO 4 ) and sodium dihydrogen phosphate (NaH 2 PO 4 ) with a Na 2 HPO 4 /NaH 2-PO 4 ratio of 2/1 at 400°C for 5 h [16]. These condensed phosphates were formed according to the following equations:…”