Titanium dioxide nucleating agent

Use Ethylbenzene catalyst, dyestuff intermediate, detergent alkylate, ethyl chloride, pharmaceuticals and organics (Friedel-Crafts catalyst), butyl rubber, petroleum refining, hydrocarbon resins, nucleating agent for titanium dioxide pigments. 

There are two main processes for extracting titanium from the ores. In the first, ilmenite or titaniferous slag is attacked with sulfuric acid to form a solution of titanium. The titanium is separated as a hydrated titanium dioxide by a nucleation process which is treated to form titanium dioxide pigments. In the second process, the mineral is chlorinated in the presence of a reducing agent (usually coke) to form titanium tetrachloride. After purification by distillation, the titanium tetrachloride may be reduced with sodium or magnesium to... 

The aim of this investigation is to examine the effect of nucleating agents on factors such as crystallization onset temperature and spherulite size. The nucleating potential of titanium dioxide based pigment and that of regranulated process waste is also examined since a knowledge of such effects is essential if process and product consistency is to be achieved. 

Recycled material acts as a nucleation agent in polypropylene but is much less efficient than titanium dioxide pigment in this capacity unless higher generation regrind is utilized. 

A liner for a gas storage tank contains a polymer composition comprising a polyamide A, a nucleating agent in an amount of 0.05 to 0.15 wt%, and an impact modifier in an amount of at least 7 to 20 wt%. Suitable nucleating agents include talc, carbon black, silica, titanium dioxide, and nanoclay. ... 

Rotomolding additives include nucleating agents, such as, inoiganic substances such as talcum, metal oxides such as titanium dioxide or magnesium oxide, phosphates, carbonates or sulfates of, preferably, alkaline earth metals organic compounds such as mono- or polycarbojQ lic acids and their salts, e g., 4-tert-butylbenzoic add, adipic acid, diphenylacetic acid, sodium succinate or sodium benzoate polymeric compounds such as ionic copolymers (ionomers). ... 

Nucleating agents such as talc, mica, titanium dioxide, potassium titanate, silica, kaolin, chalk, and alumina are used in polyphthalamide. Similar nucleating agents are proposed for polyphthalamide films. ... 

Titanium dioxide was found to be a nucleating agent of PVDF used for production of membranes. ... 

Polyisocyanate-based intumescent coating is used in protecting steel stmctures in a fire situation. It contains titanium dioxide as a nucleating agent. ... 

The effect of titanium dioxide and calcium, magnesium, and aluminium oxides as nucleating agents for 2GT has been evaluated by studies of crystallization kinetics and the morphology of the 2GT-talc system has also been investigated. ... 

The most common additives are colorants. Pigments, such as titanium dioxide and carbon black, and dyes, can be used to color PBT. At the same time, colorants can act as nucleating agents for speeding crystallization. Weather resistance of PBT, which is very important for outdoor applications, can be improved by coloring with carbon black. 

For poly(cyanoaryl ether)s, suitable nucleating agents are alumina, aluminum hydroxide, aluminum powder, titanium dioxide and calcium fluoride. In contrast, kaolin, talc, mica, silica, calcium carbonate, a metal salt of an aliphatic acid, etc., which are frequently used for poly(ester)s, exhibit no effective action upon the crystallization of a polyfcyanoaryl ether) (13). 

A nucleating agent (frequently titanium dioxide) is often added to the glass to promote crystallization. The presence of a nucleating agent shifts the begin and end transformation curves to shorter times. 

---