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Preparation method of core-shell cationic acrylic resin

A cationic acrylic, core-shell type technology, applied in the field of coatings, can solve the problems of changing the properties of polymer emulsions, hot stickiness, cold brittleness, and solvent resistance, and achieve the effects of reduced use, low toxicity, and no environmental pollution

Active Publication Date: 2017-03-15
邵阳华升建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional acrylate emulsion coating has the disadvantages of "hot stickiness, cold brittleness" and solvent resistance, which limit its application. However, the unique latex particle structure of the core-shell polymer emulsion can significantly change the properties of the polymer emulsion, so it can Perfectly overcome these defects

Method used

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  • Preparation method of core-shell cationic acrylic resin
  • Preparation method of core-shell cationic acrylic resin
  • Preparation method of core-shell cationic acrylic resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 6g of deionized water, 0.28g of cetyltrimethylammonium chloride and 0.14g of LCN407 emulsifier to the beaker in turn, put it on a high-speed shear emulsifier and stir it at 150r / min to dissolve, and adjust the speed to 500r / min, then slowly add 6g methyl methacrylate, 12g styrene, 1.4g n-butyl methacrylate, 0.6g dimethylaminoethyl methacrylate mixed monomer into the beaker, and pre-emulsify for 1h. In the same manner as above, the shell pre-emulsion was prepared, wherein the shell components were: 6g deionized water, 0.28g cetyltrimethylammonium chloride and 0.14g LCN407; 3g methyl methacrylate, 5.8g Styrene, 1 g of n-butyl methacrylate, 0.6 g of dimethylaminoethyl methacrylate, 1.2 g of N-methylolacrylamide, 6.4 g of 2-ethylethyl acrylate, 2 g of diacetone acrylamide. Add another 30g of deionized water, 0.10g of cetyltrimethylammonium chloride and 0.05g of LCN407 to a 250mL four-neck flask in turn, place it in a constant temperature water bath at 75°C and stir even...

Embodiment 2

[0039] Add 6g of deionized water, 0.16g of cetyltrimethylammonium chloride and 0.32g of LCN407 emulsifier in sequence in the beaker, put it on a high-speed shear emulsifier and stir at 150r / min to dissolve, and adjust the speed after it is completely dissolved. To 500r / min, slowly add 10g of methyl methacrylate, 8g of styrene, 1.4g of 2-ethyl ethyl acrylate, 0.6g of N-methylolacrylamide mixed monomer into the beaker, and pre-emulsify for 1 hour. In the same manner as above, the shell pre-emulsion was prepared, wherein the shell components were: 6g deionized water, 0.16g cetyltrimethylammonium chloride and 0.32g LCN407; 5.4g methyl methacrylate, 3g n-butyl methacrylate, 1g styrene, 6.5g n-butyl acrylate, 1.2g dimethylaminoethyl methacrylate, 1.2g N-methylolacrylamide, 1.5g 2-ethyl ethyl acrylate, 2.2 g diacetone acrylamide. Add another 30g of deionized water, 0.16g of cetyltrimethylammonium chloride and 0.32g of LCN407 to a 250mL four-necked flask in turn, place it in a consta...

Embodiment 3

[0044] Add 6g of deionized water, 0.28g of cetyltrimethylammonium chloride and 0.14g of LCN407 emulsifier in sequence in the beaker, put it on a high-speed shear emulsifier and stir it at 150r / min to dissolve, and adjust the speed after it is completely dissolved. To 500r / min, slowly add 8.6g methyl methacrylate, 7g styrene, 2g n-butyl methacrylate, 1g n-butyl acrylate, 1.4g N-methylolacrylamide mixed monomer into the beaker, Pre-emulsify for 1h. In the same manner as above, the shell pre-emulsion was prepared, wherein the shell components were: 6g deionized water, 0.28g cetyltrimethylammonium chloride and 0.14g LCN407; 0.6g methyl methacrylate, 0.4 g styrene, 10g n-butyl acrylate, 1.2g dimethylaminoethyl methacrylate, 1.2g N-methylolacrylamide, 2g-2-ethylethyl acrylate, 2g diacetone acrylamide, 3.2g methylol acrylamide Acryloyloxypropyltrimethoxysilane, 0.6g glycidyl methacrylate. Add another 30g of deionized water, 0.10g of cetyltrimethylammonium chloride and 0.05g of LCN4...

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Abstract

The invention discloses a preparation method of a core-shell cationic acrylic resin emulsion. The preparation method comprises adding a cationic complex emulsifier and deionized water into a reaction container, uniformly stirring the mixture, heating the mixture to 70-75 DEG C, adding a core pre-emulsion into the mixture, heating the mixture to 80-83 DEG C after 10-20min, adding an initiator aqueous solution into the mixture, carrying out a reaction process for 10-20min to obtain a seed emulsion, heating the seed emulsion to 83-86 DEG C, adding the core pre-emulsion and initiator aqueous solution into the seed emulsion drop by drop in 1-2h, carrying out thermal insulation for 0. 5-1.5h, adding the core pre-emulsion and initiator aqueous solution into the mixture drop by drop in 2-2.5h, carrying out thermal insulation for 0. 5-1.5h, cooling the reaction product to 35-40 DEG C, adding an ADH solution into the product, stirring the mixture for 20-40min, and filtering and discharging the desired product. The preparation method has the advantages of simple process and operation, and no use of post-elimination and neutralization processes. Through introduction of a crosslinking monomer, polymer molecules undergo a functional group reaction to be crosslinked and cured and to form a network structure so that polymer cohesion is improved. After film formation, the film resistance to a solvent is further improved.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a preparation method of a core-shell cationic acrylic resin. Background technique [0002] At present, most of the studies on acrylate emulsion polymerization focus on anionic acrylate emulsions, while there are relatively few studies and reports on cationic acrylic emulsions. However, since the latex particles on the surface of the cationic acrylate emulsion or the emulsion itself is positively charged, it has incomparable functions in many respects with anionic or nonionic acrylate emulsions. For example, cationic latex particles have a strong binding ability to various negatively charged particulate impurities and suspended solids in sewage, and have incomparable functions of anionic or non-ionic flocculants in sewage treatment; moreover, cationic latex particles can Through the action of electrostatic force, it is easier to stay on the negatively charged textile...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08F265/06C08F212/08C08F220/14C08F220/18C08F220/34C08F220/58C08F230/08C08F220/32C08F2/28C08F2/30C08F4/04C09D151/00C09D5/16
CPCC08F2/28C08F2/30C08F4/04C08F257/02C08F265/06C09D5/1662C09D151/003C08F220/18C08F220/1804
Inventor 闫福安罗得学
Owner 邵阳华升建材有限公司
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