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Preparation method and application of ketoaldehyde resin modified room-temperature self-crosslinked acrylate emulsion

A technology of acrylate and ketone aldehyde resin, applied in coating and other directions, can solve the problems of high emulsion film forming temperature and cracking of paint film, and achieve the effects of less environmental pollution, improved sandability, and excellent anti-adhesion.

Active Publication Date: 2014-02-05
GUANGDONG YINYANG ENVIRONMENT FRIENDLY NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hardness and anti-adhesiveness are two important reference indicators for the application of wood varnishes. However, the effect of improving anti-adhesiveness by traditionally increasing the glass transition temperature of acrylic emulsion polymers is not very satisfactory, and often makes the film-forming temperature of the emulsion If it is too high, it will increase the risk of cracking of the paint film when the emulsion is used in winter

Method used

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Examples

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Comparison scheme
Effect test

preparation example Construction

[0021] A kind of preparation method of ketone-formaldehyde resin modified room temperature self-crosslinking acrylate emulsion of the present invention, it comprises the steps:

[0022] a. In the emulsification tank, add 0.8-1.4 parts of compound emulsifier, 30-40 parts of deionized water, 20-30 parts of acrylate monomer, 3-10 parts of ketone-formaldehyde resin, and functional acrylic monomer in advance by weight. 1-3 parts, 0.08-0.12 parts of electrolyte; start stirring and emulsifying for 15-30 minutes to prepare nuclear pre-emulsion;

[0023] b. Take 1 / 3 of the nuclear pre-emulsion and add it to the reactor, add 0.06-0.1 part of initiator by weight, raise the temperature to 70-85°C and react for 30-60 minutes to obtain the seed emulsion;

[0024] c. Add the initiator to the nuclear pre-emulsion for 40-90 minutes after the temperature rise reaction, drop the remaining 2 / 3 of the nuclear pre-emulsion into the reactor, and add an appropriate amount of initiator solution synchr...

Embodiment 1

[0027] In the emulsification tank, 0.8 parts of compound emulsifier, 30 parts of deionized water, 16 parts of methyl methacrylate, 2 parts of butyl acrylate, 1 part of methacrylic acid, and 1 part of hydroxyethyl acrylate are added in advance by weight. , 3 parts of ketone-formaldehyde resin, 0.08 part of electrolyte, start stirring and emulsifying for 15 minutes to obtain a nuclear pre-emulsion; take 1 / 3 of the nuclear pre-emulsion and add it to the reactor, add 0.06 part of initiator, and heat up to 80 ° C for 30 60 minutes after the core pre-emulsion was added to the reaction kettle to heat up the reaction, the remaining 2 / 3 of the nuclear pre-emulsion was added dropwise to the reactor, and 4 parts of the initiator solution were added dropwise simultaneously. After completion, continue to keep warm at 80°C for 30 minutes; add 0.4 parts of compound emulsifier, 10 parts of methyl methacrylate, 13 parts of butyl acrylate, 1 part of methacrylic acid, and hydroxyethyl acrylate in...

Embodiment 2

[0029] In the emulsification tank, by weight, add 1 part of compound emulsifier, 27 parts of deionized water, 14 parts of methyl methacrylate, 4 parts of butyl acrylate, 0.5 parts of methacrylic acid, and 1.5 parts of hydroxyethyl acrylate , 6 parts of ketone-formaldehyde resin, 0.1 part of electrolyte, start stirring and emulsifying for 15 minutes to obtain a nuclear pre-emulsion; take 1 / 3 of the nuclear pre-emulsion and add it to the reaction kettle, add 0.06 parts of initiator, heat up to 80 ° C and react for 30 60 minutes after the core pre-emulsion was added to the reaction kettle to heat up the reaction, the remaining 2 / 3 of the nuclear pre-emulsion was added dropwise to the reactor, and 4 parts of the initiator solution were added dropwise simultaneously. After completion, continue to keep warm at 80°C for 30 minutes; add 0.4 parts of compound emulsifier, 10 parts of methyl methacrylate, 13 parts of butyl acrylate, 1 part of methacrylic acid, and hydroxyethyl acrylate in...

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Abstract

The invention discloses a preparation method and application of a ketoaldehyde resin modified room-temperature self-crosslinked acrylate emulsion. The preparation method is characterized by comprising the following steps: adding a composite emulsifier, deionized water, acrylate monomer, ketoaldehyde resin, functional acrylic monomer and electrolyte into an emulsifying cylinder; stirring for emulsifying to obtain a nuclear pre-emulsification solution; adding 1 / 3 of the nuclear pre-emulsification solution into a reaction kettle, adding an initiator, and heating to react; dropwisely adding the rest of nuclear pre-emulsification solution into the reaction kettle while dropwisely adding a right amount of initiator solution, and continuing keeping the temperature; and adding a composite emulsifier, acrylate monomer, functional acrylic monomer and deionized water into a dropwise addition emulsifying cylinder, stirring for emulsifying, dropwisely adding into the reaction kettle while dropwisely adding a right amount of initiator solution, keeping the temperature to react, cooling, adding an amine neutralizer for neutralization, and adding corresponding auxiliary crosslinking monomer. The acrylate emulsion has the advantages of excellent resistance to bond, high hardness, high gloss, high adhesiveness, high decoration property and high fullness of the paint film.

Description

technical field [0001] The invention relates to the technical field of surface coatings, and in particular to a preparation method and application of an acrylic emulsion. Background technique [0002] Acrylic emulsion has the advantages of good color retention, gloss retention, weather resistance, acid and alkali resistance, and pollution resistance. Moreover, there are a wide variety of raw materials, large options, and relatively cheap prices. Therefore, water-based coatings prepared from acrylates are widely used in many fields such as construction, leather, paper, metal anti-corrosion, wood, and plastics. However, acrylic water-based coatings also have deficiencies in water resistance, solvent resistance, hardness, etc., especially the lack of anti-adhesiveness seriously restricts its application and development. Hardness and anti-adhesion are two important reference indicators for the application of wood lacquer. However, the effect of improving the anti-adhesion by tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/14C08F220/18C08F212/08C08F220/06C08F220/28C08F220/58C08F2/24C08J3/24C09D151/08
Inventor 赵志辉刘鹏飞
Owner GUANGDONG YINYANG ENVIRONMENT FRIENDLY NEW MATERIALS CO LTD
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