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Aqueous coating containing three layer nuclear shell structure rubber particle latex and its preparation method

A technology of latex particles and core-shell structure, applied in coatings, latex paints, etc., can solve the problems of increased system viscosity, high toxicity of raw materials, easy curing, etc., and achieves simple coating operation process, good storage stability performance, storage good stability

Active Publication Date: 2006-12-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of the above-mentioned room temperature crosslinking system are that the raw materials are highly toxic and expensive, and in the case of two-component construction, it is easy to solidify during the construction period after mixing, which increases the viscosity of the system and affects the construction. The influence of human factors on the coating film is relatively large. Big

Method used

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  • Aqueous coating containing three layer nuclear shell structure rubber particle latex and its preparation method
  • Aqueous coating containing three layer nuclear shell structure rubber particle latex and its preparation method
  • Aqueous coating containing three layer nuclear shell structure rubber particle latex and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of three-layer core-shell emulsion:

[0025] A. Preparation of core layer polymer:

[0026] Add 34 kg of deionized water, 0.15 kg of disodium alkyl dibenzene sulfonate, 0.30 kg of reactive emulsifier allyl polyethylene into a 100-liter enamel reaction kettle with condensate, stirring, thermometer, and dropping device Oxygen sulfonate (SEN-10), 9.1 kg of styrene, 2.8 kg of butyl acrylate, 0.1 kg of divinylbenzene, stirred and emulsified, passed nitrogen for 20 minutes, raised the temperature to 40°C to initiate polymerization, added 0.012 kg of potassium persulfate and 0.012 kg of sodium bisulfite aqueous solution (the amount of water is 400 grams), after initiating the reaction for 1 hour, the reaction temperature of the system is gradually maintained at 60±2°C.

[0027] B: Preparation of sub-outer polymer:

[0028] Mix 2.5 kg of methyl methacrylate, 5.0 kg of butyl acrylate, 1.5 kg of glycidyl methacrylate, dropwise with 0.009 g of potassium persulfat...

Embodiment 2-12

[0040] Embodiment 2-12: The monomers used in the synthesis of latex particles and their dosage are shown in Table 1, and other preparation conditions are the same as in Embodiment 1.

[0041] Table 1: The monomers and consumptions used in the synthetic latex particles of embodiment 2-12

[0042] Unit: kg

[0043]

[0044] In the table, St is styrene, MMA is methyl methacrylate, BA is butyl acrylate, DVB is divinylbenzene, GMA is glycidyl methacrylate, AN is acrylonitrile, AA is acrylic acid; TEGDA triethylenic Glycol dimethacrylate, MAL1 maleic anhydride, IBOMA isobornyl methacrylate, AM is acrylamide; IPA isoamyl acrylate, IBOA is isobornyl acrylate, HEA is hydroxyethyl acrylate, MAL2 is butene Diacid anhydride, HAM is methylol acrylamide, TPGDA tripropylene glycol dimethacrylate, EA ethyl acrylate, VCA vinyl chloroacetate, VeoVa-10 vinyl tertiary carbonate, DMEA N methacrylate, N dimethyl Amino ethyl ester.

[0045] Table 2: Te...

Embodiment 13-18

[0047] Embodiment 13-18: the configuration of color paint type coating

[0048] Add 100 parts of deionized water, 5 parts of dispersant DP-270, 1.5 parts of defoamer 681F into the 200-liter dispersion tank of the high-speed disperser, stir at 1200 rpm for 10 minutes, and slowly add commercially available rutile titanium dioxide in sequence 50 parts, 10 parts of kaolin, 5 parts of talcum powder, continue to stir and disperse for 20 minutes, grind twice with a sand mill, and the fineness reaches below 30 microns to form a pigment slurry for use.

[0049] Add 100 parts of the three-layer core-shell structure emulsion of step (1) in Example 2, 4, 6, 8, 10 or 12 of the present invention into the stirring tank, start stirring, and stir at 100-300 rpm , Add dropwise 0.2 parts of pH regulator AMP95, 5 parts of film-forming aid 795, 2 parts of film-forming aid (propylene glycol), 0.5 part of wetting agent, and 0.2 part of defoamer 681F.

[0050] Slowly add the ground pigment slurry in...

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Abstract

The invention relates the water paint with three-layer shell sandwich rubber latex emulsion and preparing method. The method has the advantages of low cost, simple technology and improving fire-resisting property, water resistance and hardness of water paint film.

Description

Technical field: [0001] The invention relates to a water-based paint containing a three-layer core-shell structure latex particle emulsion and a preparation method thereof. Background technique: [0002] Acrylic water-based paint is a paint that uses water as a dispersing diluent. There is no volatilization of organic solvents in the coating, and no organic solvents remain during use. It is an environmentally friendly paint, and it is mostly used for interior and exterior walls of buildings. . When used in the coating of wood and metal surfaces, it is required that the coating has high surface hardness, good heat resistance and good water resistance. However, when acrylic water-based coatings are applied to wood and metal surfaces, the water-based coatings have poor water resistance, poor heat resistance, and the problems of low varnish hardness will be highlighted, which limits the application of water-based acrylic water-based coatings. [0003] In order to improve the m...

Claims

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Application Information

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IPC IPC(8): C09D5/02C09D133/12C09D125/08C08F20/10
Inventor 李效玉刘月文
Owner BEIJING UNIV OF CHEM TECH
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