Study on the requirement of organic primer for titanium dioxide in the plastics industry

If you are looking for high-quality products, please feel free to contact us and send an inquiry, email:

As a white pigment filler of high quality, has a variety of uses. It can be used in plastic profiles, paints (emulsion, powder, and sand), paper making, cosmetics, and chemical fiber. It can be used with both the solvent and water system. The different application and application systems have additional requirements in selecting organic coatings agents. Traditional TMP and peg are no longer sufficient to meet these requirements. They also have some negative effects, like the bubble problem. Depending on the different USES for titanium dioxide, different organic treating agents are needed to achieve a satisfactory effect in the application. In addition to the different USES for titanium dioxide, there are also differences in titanium dioxide application performance requirements.
Plastics – Requirements on titanium dioxide
1. High viscosity extrusion/dispersion lubricant
As plastic products become stronger and cheaper, they add more color filler. However, as the resin proportion decreases and compatibility between components becomes more challenging, it can cause the surface to be rough and uneven in color. Consider the colormasterbatch that is commonly used in plastics: it’s made by extrusion of titanium dioxide and granulation after being kneaded with high temperature organic resin such as polyethylene wax or high-pressure polyester. It is necessary to use the least amount of carrier resin to moisten the most titanium dioxide possible in order to achieve a high-concentration white masterbatch. This will avoid a lower resin compatibility when applied. In order to produce masterbatches, titanium dioxide must have excellent surface wetting and lubricating properties. If not, it is difficult to granulate or disperse.

2. Temperature/weather Resistance
Before processing or forming, the vast majority of plastics products, regardless of their type, processing method, and resin used, must be in high-temperature melt with titanium dioxide and additives. Processing temperatures for plastics are around 200 degrees, or higher. The decomposition of some components at this temperature will cause pigment migration, porosity and a serious impact on the physical strength and surface quality of plastic products. Each component of the formula must have excellent temperature resistance. For plastics used outdoors or in a healthy light environment (such a plastic films, electrical appliances, etc.), the UV resistance of each component must be taken into consideration. In PVC products, a stabilizer containing lead is added. This type of stabiliser is easily reacted with other active chemical substances at high temperature and produces black substances. Lead stabilizers cannot react with organic coating agents on titanium dioxide surfaces.

3. Dry powder fluidity/moisture resistant
As more factories adopt continuous production line for plastics products, raw materials related to them (such as fillers, resins and pigments) are also metering continuously using transmission belt or vibratory leakage sieve. Imagine that the flow rate of titanium dioxide dry is low. The powder will then get stuck in the belt of the transmission or block the screen, making it impossible to accurately measure and add titanium dioxide.

( Tech Co., Ltd. ) is an Titanium oxide professional manufacturer with 12 years’ experience in chemical research and product development. Contact us to send an inquiry if you are interested in high-quality Titanium oxide.