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High-temperature resistant waterborne polyacrylate strippable coating and preparation method thereof

A polyacrylate and butyl acrylate technology, used in fire-resistant coatings, coatings, etc., can solve the problems of difficult to meet the requirements of high-performance fields, poor water and oil resistance of latex films, poor mechanical properties, etc. Peel off, easy to prepare effect

Active Publication Date: 2016-11-23
DONGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyacrylate emulsion also has some disadvantages, such as its latex film has poor water and oil resistance, poor weather resistance, poor mechanical properties, and it is difficult to meet the requirements of high-performance fields, which has become the main factor limiting its further application.

Method used

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  • High-temperature resistant waterborne polyacrylate strippable coating and preparation method thereof
  • High-temperature resistant waterborne polyacrylate strippable coating and preparation method thereof
  • High-temperature resistant waterborne polyacrylate strippable coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 6.25ml of styrene, 2.40ml of methyl methacrylate, 2.40ml of acrylic acid, 1.00g of sodium lauryl sulfate and 25ml of deionized water into a beaker and mix evenly, and then carry out ultrasonication for 20min and a high-speed dispersion homogenizer for 1min. Pre-emulsification; then add 0.24g of potassium persulfate and continue stirring to obtain a mixed emulsion.

[0032] Add 10ml of water, 15.59ml of butyl acrylate, 0.5g of sodium lauryl sulfate and 0.12g of potassium persulfate into the Erlenmeyer flask, stir and heat to 80°C, when the blue light appears in the reaction solution, start adding the above mixed emulsion dropwise, and control it at 2 The dropwise addition was completed within -3h.

[0033] After the dropwise addition, keep it warm for 2 hours, adjust the pH to 7.5 with ammonia water, add 3.50 g of montmorillonite, stir until dissolved, then cool to room temperature and filter through a 200-mesh sieve, discharge and add 0.4 g of polyacrylic acid disp...

Embodiment 2

[0037] Take 7.25ml of styrene, 2.40ml of methyl methacrylate, 2.40ml of acrylic acid, 0.60g of sodium lauryl sulfate, 0.40g of OP-10 and 25ml of deionized water into a beaker and mix evenly, then disperse by ultrasonic for 20min at high speed Stir with a homogenizer for 1 min for pre-emulsification; then add 0.24 g of potassium persulfate and continue stirring to obtain a mixed emulsion.

[0038] Add 10ml of water, 15.59ml of butyl acrylate, 0.30g of sodium lauryl sulfate, 0.20g of OP-10 and 0.12g of potassium persulfate into the Erlenmeyer flask, stir and heat to 80°C, when blue light appears in the reaction solution, start adding the above mixture Emulsion, the control is completed dropwise within 2-3h.

[0039] After the dropwise addition, keep it warm for 2 hours, adjust the pH to 7.5 with ammonia water, add 3.50 g of montmorillonite, stir until dissolved, then cool down to room temperature, filter the material and add 0.4 g of polyurethane to obtain a high temperature res...

Embodiment 3

[0043]Take 7.25ml of styrene, 2.40ml of methyl methacrylate, 2.40ml of acrylic acid, 1.00g of sodium lauryl sulfate and 25ml of deionized water into a beaker and mix evenly, and then carry out ultrasonication for 20min and a high-speed dispersion homogenizer for 1min. Pre-emulsification; then add 0.24g of potassium persulfate and continue stirring to obtain a mixed emulsion.

[0044] Add 10ml of water, 15.59ml of butyl acrylate, 0.5g of sodium lauryl sulfate and 0.12g of potassium persulfate into the Erlenmeyer flask, stir and heat to 80°C, when blue light appears in the reaction solution, start adding the above mixed emulsion dropwise, and control it at 2- The dropwise addition was completed within 3h.

[0045] After the dropwise addition, keep it warm for 2 hours, adjust the pH to 7.5 with ammonia water, add 3.50g of nano-zinc oxide, stir until dissolved, then cool down to room temperature and filter, discharge and add 0.4g of hydroxycellulose to obtain high temperature resi...

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Abstract

The invention relates to a high-temperature resistant waterborne polyacrylate strippable coating and a preparation method thereof. The coating comprises the following raw materials in parts by weight: 35-55 parts of a polymerization monomer, 0.003-0.005 part of an initiator, 2-5 parts of an emulsifier, 5-10 parts of inorganic nano material, 0.5-1 part of a thickening agent and the balance of water based on 100 parts in total. The preparation method comprises the following steps: adding styrene, methyl.-methyl propionate, acrylic acid and emulsifier into water and stirring and mixing uniformly; performing pre-emulsification and ultrasonic treatment, and stirring; adding the initiator and stirring to obtain a mixed emulsion; mixing the initiator, the emulsifier, butyl acrylate and water, stirring and heating to 80 DEG C; after blue light is emitted, dropwise adding the mixed emulsion; preserving heat and regulating pH; adding the inorganic nano material and stirring till uniform dispersion; cooling to normal temperature; filtering; and discharging and adding the thickening agent to obtain the high-temperature resistant waterborne polyacrylate strippable coating. The method provided by the invention is easy to operate; and the product film is stripped very easily at a high temperature and has acid-base resistance and good air permeability.

Description

technical field [0001] The invention belongs to the field of water-based paint and its preparation, in particular to a high-temperature-resistant water-based polyacrylate peelable paint and a preparation method thereof. Background technique [0002] Peelable coating is a new type of high-quality surface protection film, which has the advantages of simple preparation process, good protection performance and convenient post-processing. It is widely used in the surface protection of precision parts, instruments, electronic equipment and other devices. The emergence of water-based peelable coatings complies with consumers' requirements for environmental protection and avoids the use of a large amount of volatile organic compounds. Therefore, the research on water-based peelable coatings is of great significance to the development of national science and technology and social progress, and has been widely concerned in recent years. one of the fields. [0003] Polyacrylate emulsi...

Claims

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Application Information

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IPC IPC(8): C09D133/08C09D5/20C09D7/12C08F220/18C08F212/08C08F220/14C08F220/06C08F2/24
CPCC08F2/24C08F220/18C08F220/1804C08K2201/011C08L2201/08C08L2205/02C08L2207/53C09D5/18C09D5/20C09D7/61C09D7/65C09D133/08C08L33/02C08K3/346C08L75/04C08L1/284C08K2003/2296C08F212/08C08F220/14C08F220/06
Inventor 周兴平周茜
Owner DONGHUA UNIV