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A kind of emulsion for exterior wall paint and preparation method thereof

A technology for exterior wall coatings and emulsions, applied in the direction of coatings, etc., to achieve low modulus, improve low-temperature film-forming performance, and significantly reduce film-forming temperature

Active Publication Date: 2021-03-26
东方雨虹民用建材有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of emulsion for exterior wall paint and preparation method thereof; Make the latex for exterior wall paint of preparation easy film-forming at low temperature, good stain resistance, excellent aging resistance, solve the problem of exterior wall paint, roofing Water-based emulsion for coatings, low-temperature film-forming and strong stain resistance cannot be taken into account; the synthesis process is simple and industrialized production can be realized

Method used

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  • A kind of emulsion for exterior wall paint and preparation method thereof
  • A kind of emulsion for exterior wall paint and preparation method thereof
  • A kind of emulsion for exterior wall paint and preparation method thereof

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preparation example Construction

[0018] One aspect of the present invention provides a kind of preparation method of emulsion for exterior wall coating, and this preparation method comprises:

[0019] (1) Mix A component and B component separately to obtain pre-emulsified A component and B component;

[0020] (2) In the presence of water, emulsifiers, pH regulators and initiators, the pre-emulsified A component is added dropwise to the reactor at a speed of 50-100ml / h to carry out polymerization, and then to the Add the pre-emulsified B component dropwise into the reactor, and adjust the dropping speed of A component at the same time, so that the AB components are dropped at the same time, and continue to react after the drop, to obtain the emulsion for exterior wall paint;

[0021] Wherein, the A component includes: soft monomer, optional hard monomer, acrylic acid, emulsifier and water; the B component includes: hard monomer, optional soft monomer, acrylonitrile, emulsifier and water.

[0022] The inventi...

Embodiment 1-4

[0042] The amount of each raw material of the emulsion for exterior wall paint provided by Embodiment 1-4 is specifically shown in Table 1, and the specific preparation method is as follows:

[0043] (1) Stir each material of component A at room temperature for 15 minutes and mix evenly for pre-emulsification to obtain pre-emulsified component A;

[0044] (2) Stir each material of component B at room temperature for 15 minutes and mix evenly for pre-emulsification to obtain pre-emulsified component B;

[0045](3) Add deionized water, emulsifier, and sodium bicarbonate into the reactor according to the ratio, and stir and heat to 83°C, blow nitrogen into the reactor, and add ammonium persulfate after 2 minutes; then put the pre-emulsified Component A is slowly added dropwise to the reactor at 75ml / h. After 30 minutes, the pre-emulsified component B is added dropwise to the reactor at a constant speed, and the rate of addition of component B is controlled to 2h. At the same tim...

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Abstract

The invention discloses emulsion for exterior wall coating and a preparation method thereof. The preparation method comprises the following steps: (1) uniformly mixing a component A and a component Bto obtain a pre-emulsified component A and a pre-emulsified component B; (2) dropwise adding the pre-emulsified component A into a reactor at the speed of 50 to 100ml / h in the presence of water, an emulsifier, a PH (Potential of Hydrogen) regulator and an initiator, and carrying out polymerization reaction; then dropwise adding the pre-emulsified component B into the reactor; meanwhile, adjustingthe dropwise adding speed of the component A and dropwise adding all the component A and component B at the same time; and after finishing dropwise adding, continually reacting to obtain the emulsionfor the exterior wall coating. The component A comprises a soft monomer, an optional hard monomer, acrylic acid, the emulsifier and the water; and the component B comprises a hard monomer, an optionalsoft monomer, acrylonitrile, the emulsifier and the water. The structure of the emulsion synthesized by the method is similar with a core-shell structure, and the prepared emulsion has a soft-core and hard-shell structure so that the emulsion has the characteristics of good flexibility and high modulus.

Description

technical field [0001] The invention belongs to the technical field of water-based emulsion, and more specifically relates to an emulsion for exterior wall paint and a preparation method thereof. Background technique [0002] The stain resistance of coatings is an important performance index in the actual application of exterior wall coatings. Insufficient stain resistance seriously affects the decorative effect and service life of exterior wall coatings, and is also a key factor restricting the application range of coatings. Especially in recent years, the air quality in my country's cities is generally poor, and after a period of use, the paint film generally has different degrees of dust pollution, which seriously affects the application and promotion of paint in exposed engineering and decorative fields. [0003] As the main film-forming substance in water-based paint formulation, polymer emulsion is also a key factor affecting and determining the stain resistance of pai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/18C08F220/06C08F220/46C08F2/26C08F2/30C09D133/08
CPCC08F2/26C08F2/30C08F220/14C09D133/08C08F220/1804C08F220/06C08F220/46
Inventor 尹新民熊亚京熊卫锋常英
Owner 东方雨虹民用建材有限责任公司