A highly stable modified silicone oil emulsion

A technology for modifying silicone and oil emulsions, which is applied in the treatment of dyed organosilicon compounds and fibrous fillers, etc. It can solve the problem of not mentioning the stability of modified silicone oil, the inability to conveniently adjust the length and quantity of side chains, and the inability to obtain modification Solve problems such as silicone oil emulsion, achieve good dispersion and improve oil dispersion

Active Publication Date: 2021-03-26
山东道安新材料有限公司
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Problems solved by technology

[0006] Patent CN107722676A discloses a modified silicone oil used for organic treatment of titanium dioxide, wherein the general formula of the modified silicone oil mentions that the side chain can be grafted as C1-C2 alkoxysilyl or carboxyl-substituted C1-C12 alkane group, but it did not prepare modified silicone oil with long alkyl side chain in the examples, and did not mention the stability of modified silicone oil
Moreover, the modified silicone oil used is not self-produced, but directly purchased from the market, and the length and quantity of side chains cannot be adjusted conveniently, so it is impossible to obtain modified silicone oil emulsions with different properties to meet the actual needs of titanium dioxide production.

Method used

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  • A highly stable modified silicone oil emulsion
  • A highly stable modified silicone oil emulsion
  • A highly stable modified silicone oil emulsion

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preparation example Construction

[0039] Preparation of long chain alkyl modified silicone oil:

[0040] The preparation method of the long-chain alkyl modified silicone oil can refer to the method described in CN101434702A. Specifically, it is composed of a certain proportion of high hydrogen-containing silicone oil (202), octamethylcyclotetrasiloxane (D 4 ) and hexamethyldisiloxane (MM) reaction, adding 5% concentrated sulfuric acid of the total mass of the above materials as a catalyst, reacting at 60-70°C for 3-6 hours, at 120-140°C, 0.1MPa vacuum condition The volatile matter was distilled off to obtain a low hydrogen-containing silicone oil (PHMS) intermediate product. Under nitrogen protection, add catalyst H to α-olefins with a carbon chain length of 12-18 2 PtCl 6 , added dropwise to the above-mentioned low hydrogen-containing silicone oil (PHMS), and reacted at 80°C for 1-4 hours; at 120-140°C, volatile substances were evaporated under 0.01MPa pressure to obtain long-chain alkanes base modified ...

Embodiment 13

[0090] Get 200g NR950 rutile titanium dioxide (purchased from Jinpu Titanium Industry), stir and beat with deionized water to obtain a slurry with a concentration of 240-260g / L, add 0.72g of the silicone oil emulsion prepared in Example 3 of the present invention to it , After stirring for 30min, dry at 110°C for 12h. After grinding, it is pulverized by a jet mill to obtain a titanium dioxide sample.

Embodiment 14

[0092] Use 0.72 g of the silicone oil emulsion prepared in Example 5 of the present invention as a dispersant, and the other steps are the same as in Example 13.

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Abstract

The invention provides modified silicone oil emulsion with stable height. The emulsion is prepared from the following main ingredients in parts by weight: 10-15 parts of simethicone, 0.7-1.1 parts oflong-chain alkyl modified silicone oil, 0.5-1.2 parts of polyethylene glycol (PEG), 0.2-0.7 part of primary alcohol ethoxylate, 0.5-1 part of polyoxyethylene sorbitan fatty acid ester, 1-1.6 parts ofalkylphenol polyoxyethylene, 0.3-0.7 part of sulfosuccinate sodium salt and 25-35 parts of deionized water. The modified silicone oil emulsion shows high stability in high-speed centrifuge, high temperature resistance and storage stability tests, has wide applicability as dispersant in titanium dioxide production. The titanium dioxide prepared by using the modified silicone oil emulsion as dispersant has good dispersibility, especially the oil dispersibility is remarkably promoted.

Description

technical field [0001] The invention relates to a silicone oil emulsion, in particular to a highly stable modified silicone oil emulsion and a preparation method thereof, and also to a method for preparing titanium dioxide by using the modified silicone oil emulsion as a dispersant. Background technique [0002] Titanium dioxide, whose main component is titanium dioxide, is widely used in coatings, plastics, inks, papermaking, chemical fibers, ceramics and other industries. Due to TiO 2 The specific surface area of ​​the particles is large and has a high specific surface energy; at the same time, the Ti-O bond length of titanium dioxide is small and unequal, making TiO 2 The molecular polarity is very strong, and the water adsorbed on the surface dissociates due to polarization to form hydroxyl groups. During the production and application of titanium dioxide, due to the 2 Due to the special physical and chemical properties and surface characteristics of the particles, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08L83/04C08L71/02C08K5/42C09C1/36C09C3/12
CPCC08J3/03C08J2383/04C08J2471/02C08J2483/04C08K5/42C09C1/3684C09C3/12
Inventor 王寅之
Owner 山东道安新材料有限公司
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