Preparation method of water-borne acrylic resin emulsion for wood paint

A technology of acrylic resin and wood lacquer, applied in the direction of coating, etc., can solve the problems of high film-forming temperature, difficult production control, poor transparency, and poor sandability, and achieve high transparency, good water resistance, and sandability of the paint film Good results

Inactive Publication Date: 2013-06-05
景立秋
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acrylic resin emulsion described in Chinese patent CN101121770 is prepared by a two-step process. The first step is to prepare a water-based acrylic resin prepolymer, and then, the second step is to make a resin emulsion through internal emulsification. The production process is complicated and the cost is high.
The water-based acrylic resin described in Chinese patent CN102757529A is cross-linked and solidified by adding the synthesized blocked isocyanate, and the production is not easy to control. The resin contains organic solvents such as ethylene glycol monobutyl ether, which will cause pollution to the environment.
The existing commercially available water-based acrylic resin emulsions for wood ware have defects such as transparency, poor sandability, low hardness, high film-forming temperature, poor blocking resistance, and poor water resistance. In order to solve these problems, it is required to have higher performance. Water-based acrylic resin emulsion for wood paint

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1. Formula

[0016] Mixed monomers: 700 parts of methyl methacrylate, 30 parts of acrylic acid, 120 parts of butyl acrylate, 140 parts of β-hydroxyethyl acrylate, 80 parts of vinyl acetate, 130 parts of styrene, tung oil 154 copies.

[0017] Emulsifier: 7 parts of OP-10, 6 parts of sodium lauryl sulfate.

[0018] Initiator solution I: 13 parts of potassium persulfate, 45 parts of water.

[0019] Initiator solution II: 3 parts of potassium persulfate, 20 parts of water.

[0020] Cross-linking agent: 11 parts of acrylamide, 12 parts of adipic acid dihydrazide.

[0021] Neutralizer: 141 parts of ammonia water.

[0022] 2. Operation steps

[0023] Put the mixed monomer and emulsifier weighed according to the formula amount into the pretreatment tank for pre-emulsification to obtain an emulsified mixture, transfer 20% of it to the reaction kettle, add initiator and water, and transfer the remaining emulsified mixture to a high position Tank kettle; when the temperature...

Embodiment 2

[0030] 1. Formula

[0031] Mixed monomers: 680 parts of methyl methacrylate, 16 parts of acrylic acid, 116 parts of butyl acrylate, 90 parts of β-hydroxyethyl acrylate, 16 parts of styrene, and 67 parts of tung oil.

[0032] Emulsifier: Tween 804 parts OP-109 parts.

[0033] Initiator solution I: 8 parts of azobisisobutyronitrile, 3 parts of sodium lauryl sulfate, and 45 parts of water.

[0034] Initiator solution II: 4 parts of ammonium persulfate, 16 parts of water.

[0035] Cross-linking agent: 14 parts of diacetone acrylamide, 18 parts of adipic acid dihydrazide.

[0036] Neutralizer: 85 parts of triethanolamine.

[0037] 2. The operation steps are the same as in Embodiment 1.

[0038] Technical indicators of water-based acrylic resin emulsion for wood paint:

[0039] Viscosity: 30cp.s(25℃)

[0040] Solid content: 43%

[0041] Disperse phase particle size: ≤0.1μm

[0042] Storage stability: 36 months.

Embodiment 3

[0044] 1. Formula

[0045] Mixed monomers: 710 parts of methyl methacrylate, 18 parts of acrylic acid, 89 parts of butyl acrylate, 120 parts of β-hydroxyethyl acrylate, 68 parts of vinyl acetate, and 85 parts of linseed oil.

[0046] Emulsifier: Tween-404 parts, OP-106 parts.

[0047] Initiator solution I: 7 parts of benzoyl peroxide, 6 parts of ammonium persulfate, and 52 parts of water.

[0048] Initiator solution II: 4 parts of ammonium persulfate, 16 parts of water.

[0049] Cross-linking agent: 12 parts of diacetone acrylamide, 25 parts of sebacic acid dihydrazide.

[0050] Neutralizer: 67 parts of N,N-dimethylethanolamine.

[0051] 2. The operation steps are the same as in Embodiment 1.

[0052] Technical indicators of water-based acrylic resin emulsion for wood paint:

[0053] Viscosity: 126cp.s(25℃)

[0054] Solid content: 38%

[0055] Disperse phase particle size: ≤0.09μm

[0056] Storage stability: 36 months.

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Abstract

Provided is a preparation method of water-borne acrylic resin emulsion for wood paint. A mixing monomer and emulsifier are mixed and emulsified to form an emulsified and mixed body, a part of the emulsified and mixed body is put into a reaction still, and initiator and water are added. The reaction still is heated, the rest emulsified and mixed body and initiator I are added dropwise, then initiator II is added, temperature is lowered, cross-linking agent is added for reaction, neutralizer is added, then temperature is lowered and the water-borne acrylic resin emulsion is obtained. The mixing monomer comprises crylic acid, methyl methacrylate, butyl acrylate, crylic acid-beta- hydroxyethyl ester, vinyl acetate and the like, the cross-linking agent comprises acrylamide, diacetone-acryloamide and the like, the neutralizer comprises ammonia water, triethanolamine and the like, the initiator I and the initiator II comprise potassium peroxodisulfate, ammonium persulfate and the like, and the emulsifier comprises OP-10, twain-40 and the like. The water-borne wood paint produced through the water-borne acrylic resin emulsion is environment-friendly, non-toxic, unscented, good in rubbing property, high in hardness, good in water-resisting property, and low in cost, and common film lesions such as bubbles, particles and whitening do not occur easily.

Description

technical field [0001] The invention relates to a preparation method of a water-based acrylic resin emulsion, in particular to a preparation method of a water-based acrylic resin emulsion for wood paint, which belongs to the chemical coating technology. Background technique [0002] With the advent of the era of low-carbon economy and environmental protection economy, it is an inevitable development trend for water-based coatings to replace traditional solvent-based coatings. In recent years, water-based wood lacquers have become the focus of development of wood lacquers. The acrylic resin emulsion described in Chinese patent CN101121770 is prepared by a two-step method. The first step is to prepare a water-based acrylic resin prepolymer, and then, the second step is to make a resin emulsion through internal emulsification. The production process is complicated and the cost is high. The water-based acrylic resin described in Chinese patent CN102757529A is cross-linked and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/14C08F220/06C08F220/18C08F220/28C08F218/08C08F212/08C08F220/68C08F4/30C08F4/34C08F4/04C09D133/12
Inventor 景立秋赵景临
Owner 景立秋
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