Composite silicone oil emulsion and preparation method thereof

A technology of silicone oil emulsion and dimethyl silicone oil, applied in the field of silicone oil emulsion, can solve the problems of difficult emulsification, high price, large amount of coupling agent, etc., and achieve the effects of improving dispersibility, enhancing dispersion stability, and enhancing dispersing performance.

Active Publication Date: 2019-03-08
山东道安新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low surface tension and high viscosity of silicone oil, it is difficult to emulsify. On the other hand, silicone oil itself is a demulsifier, which makes the emulsion difficult to maintain stability.
[0004] Patent CN104945958A discloses a preparation method of titanium dioxide, wherein silicone oil, silane coupling agent, and titanate coupling agent are used, but the amount of coupling agent used is too large, exceeding the amount of silicone oil, and the price is high. Lack of application value in the production of titanium dioxide

Method used

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  • Composite silicone oil emulsion and preparation method thereof
  • Composite silicone oil emulsion and preparation method thereof
  • Composite silicone oil emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The synthesis of embodiment 1 polymethacrylic acid (PMAA)

[0035] Methacrylic acid (MAA), methyl methacrylate, water, chain initiator K 2 S 2 o 8 and chain transfer agent NaHSO 3 Add it into the reaction kettle according to a certain proportion, and stir. Release 2 / 3 of the reaction liquid in the kettle and add it to the dripping tank. Heat the remaining reaction solution in the kettle to the reflux temperature, add 1 / 3 of the total amount of the initiator dropwise, and keep it warm for 30-60 minutes. At the reflux temperature, add 2 / 3 of the initiator and the reaction solution in the dropping tank two-way dropwise at a flow rate of 1:5, and add it to the reaction tank at the same time, and keep warm to continue the reaction for 1-3h. Cool to 30-40°C and discharge to obtain polymethacrylic acid (PMAA).

Embodiment 2

[0036] The synthesis of embodiment 2 polysodium methacrylate (PMAA·Na)

[0037] Methacrylic acid (MAA), methyl methacrylate, water, chain initiator K 2 S 2 o 8 and chain transfer agent NaHSO 3 Add it into the reaction kettle according to a certain proportion, add NaoH dropwise until the pH of the reaction solution in the kettle is 7-9, and stir. Release 2 / 3 of the reaction liquid in the kettle and add it to the dripping tank. Heat the remaining reaction solution in the kettle to the reflux temperature, add 1 / 3 of the total amount of the initiator dropwise, and keep it warm for 30-60 minutes. At the reflux temperature, add 2 / 3 of the initiator and the reaction solution in the dropping tank two-way dropwise at a flow rate of 1:5, and add it to the reaction tank at the same time, and keep warm to continue the reaction for 1-3h. Cool to 30-40°C and discharge to obtain polysodium methacrylate (PMAA·Na).

[0038] It is also possible to prepare polymethacrylic acid (PMAA) accor...

Embodiment 3

[0042] Add a certain amount of maleic acid (MA) in reactor, initiator K 2 S 2 o 8 , chain transfer agent NaHSO 3 and water, slowly heated and stirred to dissolve. Slowly add a certain amount of methacrylic acid (MAA) aqueous solution dropwise at reflux temperature, react at a constant temperature of 50-70°C for 2-6h, and discharge after cooling to obtain maleic acid-methacrylic acid copolymer (PMA-MAA) .

[0043] The maleic acid-methacrylic acid copolymer was converted to the sodium salt form (PMA-MAA·Na) by adjusting the pH to neutral with NaOH.

[0044] Polymethacrylic polymer dispersants with different structures and molecular weights were synthesized according to the synthesis method of the above-mentioned Examples 1-3, as shown in Table 1.

[0045] Table 1

[0046]

[0047]

[0048] Number average molecular weight test The number average molecular weight was determined by the end group method. The number average molecular weight of the methacrylic polymer of ...

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Abstract

The invention provides a composite silicone oil emulsion. The composite silicone oil emulsion comprises the following main components in parts by weight: 10 to 15 parts of dimethyl silicone oil, 2 to3 parts of a polymethylacrylic acid polymeric dispersant, 0.2 to 0.7 part of polyoxyethylene aliphatic alcohol ether, 0.5 to 1 part of sorbitan esters of fatty acid, 1 to 1.6 parts of alkylphenol polyoxyethylene ether, 0.3 to 0.7 part of sodium sulfosuccinate, 0.2 to 0.5 part of a titanate coupling agent, 0.4 to 0.8 part of a silane coupling agent, and 28 to 32 parts of deionized water. The composite silicone oil emulsion is not layered and broken in high-speed centrifugation, high-temperature and long-term storage conditions, and has high stability. Titanium dioxide prepared through the composite silicone oil emulsion serving as a dispersing agent is good in dispersibility, particularly the oil-dispersing property is obviously enhanced, and good dispersibility can be still kept after thetitanium dioxide is stored for a long time.

Description

technical field [0001] The invention relates to a silicone oil emulsion, in particular to a composite silicone oil emulsion containing a complex coupling agent and a polymer dispersant, which has high stability and is used as a dispersant in the production of titanium dioxide. 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 is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L33/00C08L71/02C08K5/10C08K5/54C08J3/03
CPCC08J3/03C08J2383/04C08K5/10C08K5/54
Inventor 王寅之
Owner 山东道安新材料有限公司
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