Лако-красочные материалы — производство

These brown to buff pigments are modified versions of pseudobrookite, Fe2TiO5. As seen in Table 6.2, they are surprisingly classified as C. I. Pigment Black 12. They possess a range of shades similar to that obtained for the ZnFe and ZnTiFe spinels. There are at least two chemistries in products seen in the marketplace. One […]

The BaNiTi yellow priderite pigments are weaker and greener than the NiSbTi DR pigments. Their commercial formulas were developed mostly by empirical test­ing. The DCMA handbook has their chemistry incorrectly listed as 2NiO x 3BaO x 17TiO2, which would result in the presence of secondary phases. Some of the stoichiometry confusion is due to complex […]

The patent literature shows that DR pigments date back to at least 1934. At that time their primary application was the coloration of ceramic ware. In the USA, however, it was the development of the vinyl siding market that created a large market for these pigments. Like the white TiO2 rutile pigments, they have a […]

A literature search on the specified titanate pigments yielded the 22 independent patents listed in Table 6.4. The majority of the patents deal with DR pigments. They cover compositions, processing, and improved properties. The older patents were concerned with ceramic applications, while the newer patents are primarily targeted at improved stability in polymers and paints. […]

John Maloney 6.1 Introduction “Titanate” pigments typically refer to the colored rutile-structured pigments such as nickel antimony titanium yellow rutile. These pigments are heavily used in polymer and paint applications, especially for vinyl siding. In a broader context, several other TiO2-containing pigments with similar applications can also be con­sidered titanate pigments. This chapter will cover […]

There is one commercially important chromite-based green pigment in this class. This is a cobalt chromite green, C. I. Pigment Green 26. These pigments are spi­nels made from cobalt(II) oxide and chromium oxide green, with the general for­mula CoCr2O4. Common modifiers include aluminum, titanium, magnesium, and zinc oxides. The cobalt(II) ions in the spinel are […]

There are three groups of commercially important ferrite and chromite browns. The first are pure ferrites defined by C. I. Pigments Brown 11, Brown 31, and Yel­low 119, followed by the mixed chromite/ferrite browns which are C. I. Pigments Brown 33 and Brown 35. These are all spinels. The third type is mixed chromium iron […]

There are three types of black chromites and ferrites. These contain copper, cobalt, and nickel. The copper-containing blacks include C. I. Pigments Black 23, Black 26 (modified), and Black 28. Cobalt-containing grades include C. I. Pigments Black 27 and Black 29. There is one important nickel black, C. I. Pigment Black 30. All of these […]

A large number of CICPs contain transition metal oxides without a significant amount of a colorless base oxide. These pigments, listed in Table 5.3, employ either green chromium(III) oxide, red iron(III) oxide, or a combination of the two as a base. They are thus referred to as chromites or ferrites [7], for the chromium and […]

If some of the aluminum oxide in a cobalt aluminate is replaced with chromiu — m(III) oxide green, the resulting compound is a cobalt chromium aluminate blue — green spinel (C. I. Pigment Blue 36), with basic formula Co(Alx, Cr1-x)2O4, where x ranges from 0 to 1. These pigments can be further modified with zinc, […]