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Multifunctional ecological coating without formaldehyde and VOC (volatile organic compound)

A multi-functional, coating technology, applied in the field of coatings, can solve the problems of low-reactivity diluents are not effective enough, high-reactivity diluents have short shelf life, VOC volatilization and other problems, achieve good film formation and polymer diffusion rate, and suppress the generation of VOC and escape, the effect of improving mechanical properties

Inactive Publication Date: 2018-12-25
大美泰康(天津)生态科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, highly reactive thinners have a short shelf life and are not suitable for architectural coatings, while low reactive thinners are not effective enough and have poor blocking resistance
Another example is to use inorganic mineral powder as the main component of paint. However, when using inorganic powder as a paint component, particle agglomeration is easy to occur, and the compatibility with other ingredients is poor
[0014] In addition, general film formers have the possibility of VOC volatilization, which brings certain difficulties to the preparation of low-VOC or zero-VOC coating compositions

Method used

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  • Multifunctional ecological coating without formaldehyde and VOC (volatile organic compound)
  • Multifunctional ecological coating without formaldehyde and VOC (volatile organic compound)
  • Multifunctional ecological coating without formaldehyde and VOC (volatile organic compound)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064]Protect the reaction vessel with nitrogen, then add the initial charge to the reaction vessel, wherein the initial charge contains 250 parts by weight of water and 0.0001 parts by weight of HEDTA-3NA; then use a water bath to heat the flask to 90 ° C, continuously A monomer feed and an aqueous feed were added, and the continuous feed was completed within 4 hours, wherein the monomer feed contained 110 parts by weight of methyl acrylate, 60 parts by weight of methyl methacrylate, 10 parts by weight of methacrylic acid Glycidyl ester, 6 parts by weight of γ-methacryloxypropyl trimethoxysilane, the aqueous feed contains 60 parts by weight of deionized water, 2.0 parts by weight of dodecyl diphenyl ether disulfonic acid Sodium surfactant, 0.3 parts by weight of sodium persulfate, and 0.2 parts by weight of sodium bicarbonate were added. After the addition, the latex was kept at 90° C. for 1 hour to complete the polymerization, and then filtered to obtain a latex polymer.

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Embodiment 2

[0068] In a 500 mL flask equipped with a mechanical stirrer, a thermometer and a condenser, 130 g of 2-hydroxyethyl methacrylate and 0.2 g of monomethyl ether hydroquinone were placed to bring the reactor to about 50 ° C, and then 59.16 g, phosphorus pentoxide is slowly added to the reactor, the temperature is kept below 50°C, the reaction is carried out under nitrogen atmosphere for 3 hours, cooled to room temperature, filtered, the pH value of the system is adjusted to about 8.0 with sodium hydroxide solution, filtered, and then Adjust the pH value of the filtrate to 3-6, let it stand, filter out the precipitate, wash, and dry to obtain the surfactant represented by formula (I).

Embodiment 3

[0070] Prepare a multifunctional inorganic ecological coating composition, by weight, fully mix 60 parts of corrugated stone powder and 1.0 parts of surfactants made according to Example 2, then add 30 parts of latex polymers made according to Example 1 , thickener (Rheovis HS 1152, obtained from BASF) 0.2 parts, pigment (zinc oxide, obtained from Yangzhou Xinda Zinc Industry Co., Ltd.) 0.2 parts, then add 100 parts of water, stir well, and get the water-based form of the coating, namely water-based paint. Cast the aqueous dispersion of the paint onto a quartz plate, cover it, and let it dry at room temperature for 48 hours. The film thickness is 0.2-0.6mm without cracks.

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Abstract

The invention provides a multifunctional ecological coating without formaldehyde and VOC (volatile organic compounds). The coating contains, by weight, 50-90 parts of inorganic mineral powder, 5-60 parts of latex polymer, 0.1-10.0 parts of thickener, 0.1-5.0 parts of surfactant and 0.01-5.0 parts of pigment. The multifunctional ecological coating without the formaldehyde and VOC has the advantageof being particularly suitable for use as an indoor coating.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to a formaldehyde-free and VOC-free multifunctional ecological coating and a preparation method thereof, that is, to a multifunctional inorganic ecological coating. Background technique [0002] Currently, there is increasing interest in the development of coatings with lower VOC content for environmental and health reasons. Non-toxic, odorless, low VOC (Volatile Organic Compound, VOC), and even "zero VOC" environmentally friendly water-based coatings are becoming more and more popular. VOC in waterborne coatings mainly comes from residual monomers, coalescents and other additives in the emulsion. How to make the residual monomer content in the emulsion tend to zero by improving the polymerization process, and how to form a film without adding film-forming aids are the focus of current research. [0003] CN105482517A discloses a kind of ecological multi-functional inorganic coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/08C09D5/14
CPCC09D5/14C09D133/08
Inventor 潘彦革
Owner 大美泰康(天津)生态科技有限公司