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Maleic acid type anion polymerisable emusifier and its preparation method

A technology of polymerizing emulsifier, maleic acid, applied in chemical instruments and methods, chemical/physical processes, transportation and packaging, etc., can solve the problem of affecting film gloss and other surface properties, reducing film water resistance, easy to produce gel and other problems, to avoid the reduction of emulsification effect, moderate reactivity, and reduce surface tension.

Inactive Publication Date: 2008-08-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, after polymerization, the emulsifier adsorbed on the surface of the latex particle by physical action will desorb in many cases, resulting in multiple defects of the polymer product: (1) under the action of high shear force, it is easy to produce gel; (2) ) The freeze-thaw stability of the latex is poor; (3) When adding pigments and other components to the latex, the emulsifier will compete with the pigment dispersant for adsorption at the two interfaces of the latex particle and water, and the pigment and water, thereby affecting the emulsion. The rheological properties and stability of the liquid; (4) when the solid product is prepared by the gel method, the emulsifier will remain in the water phase, causing environmental pollution; (5) when the film is formed, the emulsifier will migrate or enrich At the interface between the film and the air, affecting the gloss and other surface properties of the film; or being enriched at the interface between the film and the substrate, affecting the bonding performance of the film; (6) The residual emulsifier will also cause slow film formation rate, Reduce water resistance of the membrane
[0015] At present, most anionic surfactants using maleic anhydride as raw materials introduce hydrophilic groups through the double bond of maleic acid, thus forming succinate anionic surfactants, but thus losing the polymerizable double bonds. key

Method used

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  • Maleic acid type anion polymerisable emusifier and its preparation method
  • Maleic acid type anion polymerisable emusifier and its preparation method
  • Maleic acid type anion polymerisable emusifier and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Preparation of octyl maleate amide type anionic polymerizable emulsifier

[0041] 1-1 prepares monooctyl maleate by maleic anhydride and octanol

[0042]Synthesis steps: Weigh 0.5 mol of octanol and 0.5 mol of maleic anhydride into a three-necked flask, heat and stir until the maleic anhydride melts, raise the temperature to 80° C., and react for 3 hours. Then slowly add 150ml heptane, continue to stir until a homogeneous liquid is formed, stir at room temperature for 3-5 hours, white crystals are precipitated, filtered with suction, and the filter cake is recrystallized with heptane to obtain monooctyl maleate with a melting point of 32.5- 33.3°C.

[0043] 1-2 prepares monooctyl maleoyl chloride by the reaction of monooctyl maleate and phosphorus trichloride

[0044] Synthesis steps: Weigh 0.05 mol of monooctyl maleate into a three-neck flask, heat up to melt, slowly add 0.025 mol of phosphorus trichloride dropwise, and react at 40-70°C after dropping. After the rea...

Embodiment 2

[0050] Preparation of laurylamide maleate type anionic polymerizable emulsifier

[0051] 2-1 Preparation of dodecyl monoester maleate by maleic anhydride and lauryl alcohol

[0052] Synthesis steps: Weigh 0.5 mol of n-dodecyl alcohol and 0.5 mol of maleic anhydride into a three-necked flask, heat and stir until the maleic anhydride melts, raise the temperature to 80° C., and react for 3 hours. Then slowly add 150ml of heptane, stir at room temperature for 3-5 hours, white crystals are precipitated, filtered with suction, and the filter cake is recrystallized with heptane to obtain dodecyl monoester maleate with a melting point of 57.8-58.3°C.

[0053] 2-2 Preparation of monododecyl maleic acid chloride by reaction of monododecyl maleate and sulfur oxychloride

[0054] Synthesis steps: Weigh 0.05 mol of monododecyl maleate into a three-neck flask, raise the temperature until the monoester melts, slowly add 0.15 mol of thionyl chloride dropwise, and react at 50-80°C after the d...

Embodiment 3

[0062] Preparation of Monostearyl Maleic Anhydride Semiamide Type Anionic Polymerizable Emulsifier

[0063] 3-1 Preparation of monostearyl maleate from maleic anhydride and stearyl alcohol

[0064] Synthesis steps: Weigh 0.5 mol of stearyl alcohol and 0.5 mol of maleic anhydride into a three-necked flask, heat and stir until the maleic anhydride melts, raise the temperature to 80°C, and react for 2-4 hours. Then slowly add n-heptane, stir at room temperature for 3-5 hours, white crystals precipitate out, filter with suction, and recrystallize the filter cake with n-heptane to obtain monostearyl maleate.

[0065] 3-2 Preparation of stearyl alcohol ester maleoyl chloride by the reaction of monostearyl maleate and phosphorus trichloride

[0066] Synthesis steps: Weigh 0.05mol monostearyl oleyl maleate in a three-necked flask, heat up to melt, and slowly add 0.05mol PCl dropwise 3 After dropping, keep warm at 50-80°C for reaction. After the reaction, the upper layer solution is...

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Abstract

The invention relates to a maleic acid anion polymerisable emulsifier and relative preparation, wherein said method comprises that: using maleic acid as material, via esterification chlorination and amination to prepare the emulsifier. The inventive emulsifier has strong property, which can reduce the interfacial tension of water, with simple operation. And it can adjust the length of carbon chain of aliphatic alcohol to control the HLB value of surface activator. The inventive emulsifier can improve the stability of polymer emulsion and improve the water resistance of film water resistance.

Description

technical field [0001] The invention belongs to an emulsifier in a polymerizable surfactant in the fine chemical industry field and a preparation method thereof. Background technique [0002] With the application of emulsion polymerization technology in many fields of industry today, emulsion polymerization has become one of the main methods for the production of synthetic rubber, synthetic resins, coatings, adhesives, etc., and thousands of polymers are produced by emulsion polymerization in the world every year. tons. Although the emulsifier is used in a small amount in the emulsion polymerization system, it plays an important role. The emulsifier stabilizes the emulsion before and after polymerization, guides monomers to polymerize according to the micellar mechanism during polymerization, and affects the polymerization rate, number of latex particles, particle size, and distribution. [0003] However, after polymerization, the emulsifier adsorbed on the surface of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F17/00C08F2/26C09K23/00
Inventor 乔卫红朱明月孙迎利李宗石
Owner DALIAN UNIV OF TECH
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