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Core-shell structure acrylate emulsion, preparation method and applications thereof

An acrylate, core-shell structure technology, used in coatings, anti-corrosion coatings, etc., can solve the problems of low chemical resistance, low fullness, low gloss of film formation, etc., and achieve the effect of high density and impact resistance

Active Publication Date: 2019-06-25
WANHUA CHEMICAL (NINGBO) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the existing hydroxyacrylate emulsions have low film gloss, low fullness, and lower chemical resistance than dispersion-type emulsions, which limits their application in demanding industrial protection fields

Method used

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  • Core-shell structure acrylate emulsion, preparation method and applications thereof
  • Core-shell structure acrylate emulsion, preparation method and applications thereof
  • Core-shell structure acrylate emulsion, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Preparation of S1 Acrylate Emulsion:

[0047] 1) Preparation of mixed monomer I: 69 parts (parts by mass, the same below) of tert-butyl methacrylate, 4 parts of isooctyl acrylate, and 10 parts of caprolactone-modified acrylate (PLACCEL FA2 of Daicel Company, caprolactone The lactone repeating unit is 2), 15 parts of 4-hydroxybutyl acrylate, and 2 parts of β-CEA (Solvay Company) are mixed to form a mixed monomer I;

[0048] 2) Preparation of mixed monomer II: 60 parts of tert-butyl methacrylate, 8 parts of isooctyl acrylate, 10 parts of caprolactone-modified acrylate (PLACCEL FA2, the number of caprolactone repeating units is 2), 20 parts Parts of 4-hydroxybutyl acrylate, 2 parts of β-CEA, and 8 parts of n-dodecyl mercaptan (chain transfer agent) are mixed to make mixed monomer II;

[0049] 3) Prepare the core layer pre-emulsion: add the mixed monomer I, 40 parts of water, and 0.8 part of M-12S (Shanghai Zhongcheng Company) emulsifier into the pre-emulsification kettle,...

Embodiment 2-8

[0055] Embodiment 2-8 prepares respectively S2-S8 acrylate emulsion successively

[0056] Using the same polymerization method as the S1 acrylate emulsion, the formula was changed according to the following Table 1 to prepare S2-S8 acrylate emulsions, all in the table are parts by mass. Wherein, the caprolactone-modified acrylate used in embodiment 2-6 is identical with embodiment 1, and the caprolactone-modified acrylate used in embodiment 7 is the PLACCEL FA4 of Daicel Company (caprolactone repeating unit number is 4).

Embodiment 9

[0066] The core-shell acrylate emulsions S1-S11 prepared in Examples 1-8 and Comparative Examples 1-3 were used to prepare one-component amino baking varnishes for testing their application properties. The formula of water-based amino white baking varnish is shown in Table 2.

[0067] Table 2

[0068]

[0069]

[0070] According to the formula in Table 2 above, first add 60g of water, 10g of BYK-190, 0.2g of Tego901W, 2g of Surfynol 140BC into the dispersion tank, and stir at 800r / min for 10min. Add 200g R-706 to increase the speed to 2000r / min, and after high-speed dispersion is uniform, add zirconium beads equal to the volume of the pigment and filler R-706, and grind the slurry to a fineness of ≤15μm.

[0071] Reduce the rotation speed to 800r / min, add 500g of emulsion under stirring, add an appropriate amount of DMEA to adjust the pH at 8.0-9.0, then add 125g of Cytec 325, 20g of dipropylene glycol butyl ether, 10g of ethylene glycol butyl ether, 5g of Tego Wet270, ...

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Abstract

The invention provides a core-shell structure acrylate emulsion, a preparation method and applications thereof, wherein the shell-layer polymer of the core-shell structure acrylate emulsion has a number average molecular weight of 50000-250000, the number average molecular weight of the core-layer polymer is greater than the number average molecular weight of the shell-layer polymer, the shell-layer polymer and / or the core-layer polymer has a hydroxyl functional group, and the shell-layer monomer for preparing the shell-layer polymer and the core-layer monomer for preparing the core-layer polymer respectively comprise a caprolactone-modified acrylate monomer. According to the present invention, the coating material prepared based on the core-shell structure acrylate emulsion has low VOC, and the paint film has characteristics of good gloss, chemical resistance, impact resistance and the like.

Description

technical field [0001] The invention relates to the field of water-based coatings, in particular to a core-shell structure acrylate emulsion and its preparation and application. The core-shell structure acrylate emulsion is especially suitable for the preparation of water-based anti-corrosion coatings. Background technique [0002] Metal anti-corrosion coatings are widely used in metal anti-corrosion and decoration, but most of the metal paints are solvent-based coatings, which will generate a large amount of VOC during production and use, which not only wastes resources and damages the environment, but also harms the health of construction workers. Cause a lot of damage. With the government's increasing concern for environmental protection and the improvement of people's awareness of environmental protection, the development and use of water-based metal anti-corrosion coatings has become the focus of the coatings industry at home and abroad. [0003] Acrylate emulsions for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/28C08F220/20C09D133/10C09D161/20C09D5/08
Inventor 陆佳伟郝宝祥乔义涛孙家宽
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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