| Masterbatch organic surface treatment process and technical details | |
| Release time：2016/9/24 | |
Commonly used masterbatch technology is wet process. Masterbatch grinding material via water phase, phase inversion, washing, drying, granulation, and only in this way can we guarantee the quality of the product. Pigments in grinding processing at the same time, also should undertake a series of technical inspection of the masterbatch, determination of such as sanding slurry fineness, the spread of the abrasive slurry performance, determining the solid content of sand slurry and determination of printing ink fineness, etc. Through the organic combination of appropriate surface modification treatment, masterbatch is the use of the titanium dioxide some performance is greatly improved. After high temperature calcination and inorganic coated titanium pigment, chemical stability is very good, basic not with plastic system of various components on the chemical reaction. But some organic agents are likely to be involved in chemical reactions. Therefore, we should choose some chemical inert organic agents, such as some special or polysiloxane modified polysiloxane, it in low temperature and high temperature environment has the very good chemical stability, will not happen with any additives in the masterbatch system chemical action. Titanium dioxide due to lattice defects, when high temperature because of the color change. Full of inorganic membrane and suitable organic film can significantly improve the heat-resistant performance of titanium dioxide. Traditional organic package because its itself is not high temperature resistant, high temperature environment are prone to yellowing and decomposition, and a lot of titanium dioxide manufacturers in practical application are met the "yellow" problem. Some special organic silicon materials decomposition temperature of more than 350 degrees, 300 degrees within will not change color, yellowing is not going to happen. In addition, the organic silicon coating on titanium dioxide particles surface, can prevent the transfer of free radicals, thus further improve the heat resistance and light resistance titanium dioxide. Masterbatch in titanium dioxide migration is mainly due to its compatibility with the resin wetting is bad, the temperature is reduced, plastic shrinkage, resin and titanium dioxide movement speed caused by the inconsistent. To reduce the mobility, we should improve the compatibility of titanium pigment and resin. According to the principle of similar compatible, organic agents on the surface of the titanium dioxide had better have the same or similar functional groups and application of resin. For the most common type of polyolefin plastics, choose black masterbatch containing long chain alkane organic agents will be more suitable. |
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