Лако-красочные материалы — производство

Cerium sulfide pigments are also used for some applications in printing inks and polyurethane foams, and are being evaluated in laminated paper. 4.5 Toxicology and Environmental Aspects Cerium sulfide pigments (NEOLOR™) are almost completely insoluble in water, and the cerium ion shows effectively no toxicity (acute or chronic). As predicted, cerium sulfide pigments have shown […]

A paint grade of cerium sulfide has also been developed. The pigment has been evaluated in several coatings formulations such as automotive refinish (acrylic-iso­cyanate binders), general industrial solvent-based systems (polyester-melamine binders), oil-based architectural coatings, and water-based paint. In the latter, per­formance may be improved by treatment with organics during formulation. Paint grade cerium sulfide pigment […]

4.4.1 Coloration of Plastics Cerium sulfide pigments have been developed primarily for the coloration of plas­tics. Shades of existing cerium sulfide pigments vary from light orange to dark red/burgundy. Colors obtained are less chromatic than with cadmium pigments, but are much brighter than with iron oxides. The use of cerium sulfide in combination with white […]

The majority of processes aimed at obtaining rare earth sesquisulfides of high pur­ity use solid/gas reactions. Most of the methods of synthesizing lanthanide sulfides involve high-tempera­ture gas-solid reactions between a sulfurizing agent (H2S and/or CS2) and lantha­nide precursors at high temperatures or under high pressures [21, 22]. Various types of lanthanide precursors can be used: […]

Rare earth sulfide materials have received considerable attention over past years, mainly because of their interesting optical and magneto-optical properties. Rare earth elements and sulfur combine to form a wide range of compounds as sulfides or oxysulfides [3, 4]. Among them, sesquisulfides appeared to have the best potential as far as color is concerned (Table […]

Jean-Noel Berte 4.1 Introduction Pigment Name Formula Colour Index CAS# Cerium Sulfide Light Orange Ce2S3/La2S3 PO 78 C. I. 772850 12014-93-6/ 12031-49-1 Cerium Sulfide Orange Ce2S3 PO 75 C. I. 77283-1 12014-93-6 Cerium Sulfide Red Ce2S3 PR 265 C. I. 77283-2 12014-93-6 Cerium Sulfide Burgundy Ce2S3 PR 275 C. I. 772830 12014-93-6 Only a few […]

Current annual world consumption of cadmium pigments is approximately 2,500 tonnes, used in the following applications: Table 3.2 Applications of cadmium pigments. Polymers 90% All grades ofpolymers and compound masterbatch Ceramics 6% Glasses, enamels, porcelain, tile, china and glazes 3% Oil colors, water colors, acrylics Surface Coatings 1% Coil coatings, automotive paint, high temperature paint […]

Since the 1950s, cadmium pigments have been used predominantly in the poly­mer industry. Regulations have, however, been introduced for some time to restrict their use in certain applications, because of concerns about the presence of cadmium in the environment. Pigment producers and users have always advo­cated strongly that pigments should be treated differently in environmental […]

The main advantages ofcadmium pigments are: • excellent temperature stability • Insolubility in organic solvents (non-bleeding) • light fastness and weather fastness • chemical resistance • non-migratory • good dispersibility • Polymers colored with cadmiums have good resistance to distortion and warpage • high opacity • can be recycled in polymers Table 3.1: Colour index […]

The filter-cake of the calcined and washed pigment is re-dried, then milled using a pin or hammer mill, to give the final fine powder. Although relatively soft, as with most pigments, excessive shear during this operation can be detrimental. The choice and configuration of equipment is important. The pigment is now ready for blending with […]