Phosphate modified acrylic core-shell emulsion with salt spray resistance

A technology of acrylic core and core-shell emulsion, which is applied in the fields of compounds, coatings, and organic chemistry of Group 5/15 elements of the periodic table, and can solve problems such as affecting film-forming performance, increasing application costs, and low alkyl carbon number. , to achieve the effect of excellent adhesion

Active Publication Date: 2018-07-06
ZHUHAI JELEE CHEM ENTERPRISE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Chinese patent CN102408513A discloses a method for preparing a phosphate-modified acrylate emulsion. The phosphate monomer used is trichloroethyl phosphate, trichloropropyl phosphate or n-ethyl phosphate, and the resulting phosphate-modified The molecular weight of the polymer in the acrylate emulsion is 2000-3000, and the particle size is 0.2-0.6 μm. The initiator used is ammonium persulfate. The particle size of the synthesized emulsion is large, which affects the film-forming performance, and the phosphate monomer used The alkyl carbon number is less, and the water resistance and salt spray resistance are poor
[0008] Chinese patent CN101412781A discloses a preparation method of phosphate-modified acrylate emulsion, the phosphate monomer used is Rhodia's PMA-100 (hydroxyethyl methacrylate phosphate monoester) or PMA-200 (methyl Hydroxyethyl acrylate phosphate diester), the prepared acrylic resin is formulated into a water-based two-component coating, which has excellent water resistance and salt spray resistance, but the prepared acrylic resin is not a core-shell structure, it is a water dispersion, and must be prepared Two-component system, increasing application cost
[0009] Zhang Dongyang (Research on the synthesis and performance of phosphate-modified acrylate emulsion, China Paint, 2014, 29(10); 38-43) reported that the functional Phosphate-modified acrylate emulsion was synthesized with monomers, the phosphate monomer used was Rhodia’s PMA-100 or PMA-200, the initiator was ammonium persulfate, and the emulsifier was a single anionic emulsifier. It is a phosphate-modified styrene-acrylic core-shell emulsion, and its aging resistance and salt spray resistance are not very satisfactory.
[0010] At present, water-based anti-corrosion coatings have problems such as short anti-corrosion period, easy flash corrosion after coating, emulsion stability, water resistance and rust resistance.

Method used

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  • Phosphate modified acrylic core-shell emulsion with salt spray resistance
  • Phosphate modified acrylic core-shell emulsion with salt spray resistance
  • Phosphate modified acrylic core-shell emulsion with salt spray resistance

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A kind of octyl-hydroxyethyl acrylate phosphodiester A, its preparation process is as follows:

[0039] In the reaction kettle, add 35.0 parts of hydroxyethyl acrylate and 0.2 parts of hydroquinone, stir evenly, raise the temperature to 50°C, add 28.0 parts of phosphorus pentoxide and 36.8 parts of octanol in batches, and complete the addition within 1.5 hours , and then raise the temperature to 82° C., keep the temperature for 3 hours, measure the acid value, cool down after passing the test, and discharge to obtain the octyl-hydroxyethyl acrylate phosphate diester A.

Embodiment 2

[0041] A kind of hexyl-hydroxyethyl methacrylate phosphodiester B, its preparation process is as follows:

[0042] In the reaction kettle, add 40.0 parts of hydroxyethyl methacrylate and 0.2 parts of hydroquinone, stir evenly, raise the temperature to 50°C, add 26.0 parts of phosphorus pentoxide and 33.8 parts of hexanol in batches, within 1.5h After the addition, the temperature was raised to 82°C, and the temperature was maintained for 3 hours to measure the acid value. After passing the test, the temperature was lowered, and the material was discharged to obtain the hexyl-hydroxyethyl methacrylate phosphodiester B.

Embodiment 3

[0044] A kind of octyl-acrylate hydroxypropyl phosphate diester C, its preparation process is as follows:

[0045] In the reaction kettle, add 38.0 parts of hydroxypropyl acrylate and 0.2 parts of hydroquinone, stir evenly, raise the temperature to 50°C, add 30.0 parts of phosphorus pentoxide and 31.8 parts of octanol in batches, and complete the addition within 1.5 hours , and then raise the temperature to 82°C, keep the temperature for 3 hours, measure the acid value, cool down after passing the test, and discharge to obtain the octyl-hydroxypropyl acrylate phosphate diester C.

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Abstract

The invention relates to a phosphate modified acrylic core-shell emulsion with salt spray resistance. A shell layer contains long-chain alkyl-acrylate phosphate diester functional groups; the components of the core-shell emulsion comprise acrylate soft and hard monomer, acrylic acid and long-chain alkyl-acrylate phosphate diester, a neutralizing agent, an initiator, an emulsifier and water; and the long-chain alkyl-acrylate phosphate diester is prepared from hydroxyl acrylate monomer, R6-10OH and phosphorus pentoxide through reaction. The invention also provides a preparation method of the phosphate modified acrylic core-shell emulsion with salt spray resistance. The phosphate modified acrylic core-shell emulsion has a glass transition temperature of 30-45 DEG C and a particle size of 60-150 nm; the phosphate modified acrylic core-shell emulsion provided by the invention has excellent adhesive force, water resistance, acid and alkali resistance, salt spray resistance, flash rust resistance and corrosion resistance, and is widely used for water-based antirust coating, water-based steel structure coating, water-based engineering coating, water-based concrete anticorrosive coating andthe like.

Description

technical field [0001] The invention relates to a modified acrylic emulsion, in particular to a salt spray-resistant phosphate-modified acrylic core-shell emulsion, which belongs to the technical field of water-based resin synthesis. Background technique [0002] In recent years, with the increasing attention of human beings to environmental pollution and the depletion of global oil resources, the use of solvent-based coatings has been greatly limited. Low-VOC and low-toxicity coatings such as water-based coatings, high-solid coatings, powder wood The research and development and production of coatings and radiation-cured coatings have developed rapidly. Among them, water-based coatings, because water is used as the dispersion medium, have no pollution, no fire hazards, low production costs, conform to green production, and have very broad development prospects. [0003] Corrosion of metals brings economic losses of hundreds of billions of dollars to countries around the wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F230/02C08F220/06C09D133/12C09D133/08C09D5/08C07F9/11
CPCC09D143/02C07F9/11C08F220/14C09D5/08C08F220/1804C08F220/1808C08F230/02C08F220/06C08F220/1812
Inventor 许钧强王茵键
Owner ZHUHAI JELEE CHEM ENTERPRISE CO LTD
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