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Production process of core/shell emulsion for environment-friendly wood coatings

A core-shell emulsion and production process technology, applied in coatings and other directions, can solve problems such as increasing the amount of film-forming aids used, water resistance, solvent resistance is not very good, and low VOC can not be achieved, and the film forming temperature can be reduced. , the effect of reducing the amount of film-forming aids

Inactive Publication Date: 2015-03-25
QINGDAO SHOUSHENG IND
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

At present, due to the shortcoming of "hot sticky and cold brittle" and containing a large amount of emulsifiers, acrylic emulsions are not very good in water resistance and solvent resistance. In order to achieve high hardness, it is often necessary to increase the glass transition temperature, thereby increasing the cost. The amount of film additives used, but the purpose of low VOC cannot be achieved

Method used

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Embodiment

[0012] The formula is: 0.3-0.5% conventional emulsifier, 0.3-0.5% polymeric emulsifier, 0.4-0.8% sodium persulfate, 0.03-0.05% sodium bicarbonate, 14-19% methyl methacrylate , 8-13% styrene, 10-15% butyl acrylate, 4-8% acrylonitrile, 1.0-2.2% functional monomer, 0.8-1.4% diacetone acrylamide, 55-60% Water, 0.5-0.8% ammonia water, 0.4-0.7% adipic acid dihydrazide.

[0013] The synthesis process is as follows: put a measured part of the conventional emulsifier, pH buffer, and water into the bottom of the tank, heat it to 80-82°C, and then add the remaining conventional emulsifier, polymeric emulsifier, nuclear monomer, Prepare a pre-emulsion with part of the deionized water, add 1 / 3 of the initiator solution to the kettle, stir evenly, add part of the pre-emulsion to prepare the seed emulsion, add the pre-emulsion dropwise after 15 minutes, the dropping time is about 2 hours, and the temperature is controlled at 83~ 85°C, keep warm for 1h, continue to drop shell monomer or shel...

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Abstract

The invention discloses a production process of a core / shell emulsion for environment-friendly wood coatings. A core / shell polymerization technology is adopted, so that the aims of reducing the film-forming temperature and reducing the amount of film-forming aids are achieved. A pre-emulsification process and a semi-continuous seeded emulsion polymerization mode are adopted, and acrylate emulsion with a core / shell structure and excellent performance is prepared and can be used for environment-friendly wood coatings.

Description

[0001] technical field [0002] The invention belongs to a core-shell emulsion production process, in particular to an environment-friendly core-shell emulsion production process for wood lacquer coatings. [0003] Background technique [0004] With the further improvement of environmental protection regulations, new low-VOC or zero-VOC emission coatings have become the focus of research and development, and the research and development of water-based wood coatings has attracted more attention. In my country, compared with the general application of architectural latex paint, the water-based ratio of wood coatings is far smaller than that of architectural paints. If water-based wood coatings can replace or partially replace solvent-based wood coatings, its environmental protection and social and economic benefits are very significant. At present, due to the shortcoming of "hot sticky and cold brittle" and containing a large amount of emulsifiers, acrylic emulsions are not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/18C08F212/08C08F220/44C08F220/58C08F2/24C09D133/12
Inventor 李继升
Owner QINGDAO SHOUSHENG IND
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