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Acrylate micro-emulsion with high solid content, its preparation method and use

A high-solid-content, acrylate technology, applied to high-solid-content acrylate microemulsions; the preparation of the high-solid-content acrylate microemulsions, in the field of wood coatings, can solve the problem of inability to form self-crosslinking coating films and emulsions Low solid content, high emulsifier content and other problems, to achieve the effect of low critical micelle concentration, good fluidity and excellent performance

Inactive Publication Date: 2003-08-27
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process needs to consume a lot of energy, the preparation process is complicated, and it is difficult to realize industrial production
U.S. Patent USP6117939 (2000.9.12) and USP6365675 (2002.4.2) adopt low-shear emulsification and add co-surfactant to prepare thermoplastic acrylate microemulsion, but the emulsion solid content of preparation is low, and emulsifier content is high, can not form self-crossing Coated film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The monomer composition is butyl acrylate, methyl methacrylate, methacrylic acid, hydroxyethyl methacrylate, and vinyl alkoxysilane. The composition formula is shown in Table 1:

[0041] Table 1 Acrylic microemulsion formula

[0042] Composition mass percent, %1 methyl methacrylate (MMA) 29.02 butyl acrylate (BA) 15.03 N methylol acrylamide 1.54 hydroxyethyl methacrylate 2.05 alkenyl alkoxysilane (such as A-171, A- 174 0.5

[0043] or C-1706, C-17576 methacrylic acid (MAA) 0.57 emulsifier DSB 1.5

[0044] OP-10 1.08 Potassium persulfate (KPS) 0.29 Viscosity control agent (sodium chloride) 0.1510 Secondary deionized water 48.6511 Triethylamine (10%) 1.0

[0045] Total 100.0

[0046] Add emulsifier, viscosity control agent, and 18.65 parts of deionized water into the reaction kettle, stir at high speed for 20 minutes, raise the temperature of the reaction kettle to 75°C, add part of the initiator solution dropwise, and wait until the tem...

Embodiment 2

[0049] Using the acrylate microemulsion prepared in Example 1, the wood coating formulation was prepared as shown in Table 2.

[0050] Preface

[0051] The preparation method is as follows: firstly add raw materials No. 2-7 into the stirring tank, disperse with a high-speed disperser for 10-30 minutes, then slowly add the acrylic acid microemulsion into the stirring tank, stir at a medium speed for 30-60 minutes, adjust with ammonia water The PH value of the paint, when the PH value is qualified, it is filtered, discharged and packaged. Properties of the prepared wood coating: Appearance: Milky white slightly transparent liquid without mechanical impurities; PH=7-9; solid content 35-40%, viscosity 30-200cps. Wood coating film performance: coating film pencil hardness: H; water resistance: no obvious change after immersion in water for 48 hours; adhesion: level 1; impact resistance strength: 50kg.cm; flexibility: level 1;

Embodiment 3

[0053] The monomer composition is butyl acrylate, styrene, acrylic acid, glycidyl acrylate, methacrylamide, etc., and its component formula is shown in Table 3:

[0054] Table 3 aqueous microemulsion formula

[0055] Composition Mass percentage, %1 Styrene (St) 26.02 Butyl Acrylate (BA) 15.03 Acrylic Acid (AA) 2.04 Methacrylamide 2.05 Glycidyl Acrylate 3.06 Emulsifier DNS-86 1.5

[0056] CO-987 1.07 Potassium persulfate (K 2 S 2 o 8 ) 0.28 Viscosity control agent NaHCO 3 0.19 Dodecylmercaptan 0.110 Secondary deionized water 51.75

[0057] Total 100.0

[0058] Add emulsifier, viscosity control agent, and 20 parts of deionized water into the reactor, stir at high speed for 20 minutes, raise the temperature of the reactor to 75°C, and add part of the initiator solution dropwise. After the temperature of the system is stabilized, add 0.2 parts of methacrylic acid and 1.0 parts of butyl acrylate mixed monomers dropwise at 70-90°...

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Abstract

The invention refers to a high-solid content acrylate micro-latex, its making method and its application to carpentry dope. It adopts the technique of half-continuous starvation feeding, and is obtained by the polymerizing method of seed latex. It leads into cross-linking groups in the course of polymerization such as amidogen, acetoacetyl and amido, depends on the reaction of the groups of form film, gets painting film with cross-linking construction, and improves the water and solvent resistance of the painting film.

Description

technical field [0001] The present invention relates to acrylate copolymers, especially high solid content acrylate microemulsions; [0002] The present invention also relates to the preparation method of the high solid content acrylate microemulsion; [0003] The invention also relates to a method for preparing the wood coating by using the high-solid-content acrylate microemulsion. Background technique [0004] Microemulsion is an isotropic, thermodynamically stable transparent or translucent colloidal dispersion system composed of oil, water, emulsifier and co-emulsifier used in the field of coatings. The size of the dispersed phase is nanoscale and shorter than the wavelength of visible light. The particularity of the microemulsion structure determines that a stable polymer microemulsion product can be obtained through microemulsion polymerization, the particle size range is between 10-100nm, and the polymer in the particle has a relatively high molecular weight. At pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/22C08F120/10
Inventor 瞿金清张心亚沈慧芳陈焕钦
Owner SOUTH CHINA UNIV OF TECH
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