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Silicone acrylic emulsion having core-shell structure and preparation method thereof

A core-shell structure, silicon-acrylic emulsion technology, applied in coatings and other directions, can solve the problems of poor water resistance, high temperature become viscous and become brittle, etc., and achieve good wear resistance, overcome poor water resistance, and good moisture resistance. Effect

Inactive Publication Date: 2016-03-02
SKSHU PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a core-shell structure silicon-acrylic emulsion and a preparation method thereof, which has the excellent characteristics of both acrylate polymers and organosilicon polymers, adopts organosilicon monomers to modify acrylate polymers, and overcomes the problem of acrylate polymers. Poor water resistance of polymers, brittleness at low temperature, and loss of strength at high temperature

Method used

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  • Silicone acrylic emulsion having core-shell structure and preparation method thereof
  • Silicone acrylic emulsion having core-shell structure and preparation method thereof
  • Silicone acrylic emulsion having core-shell structure and preparation method thereof

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specific Embodiment approach

[0034] A method for preparing a core-shell structure silicon-acrylic emulsion, which is prepared by the following steps in the following order from the raw materials of the following weight ratio:

[0035] 1) Preparation of acrylic acid monomer pre-emulsion stock solution:

[0036] 60.00-75.00 parts of water, 2.29-3.97 parts of polymerizable emulsifier, 0.45-0.70 parts of initiator, 10.00-15.00 parts of methyl methacrylate, 60.00-70.00 parts of butyl acrylate, 65.00-75.00 parts 2.00-5.00 parts of styrene and 2.00-5.00 parts of acrylic acid monomer were added to reactor A, and dispersed for 20-30 minutes at a stirring speed of 1000-1200r / min to obtain acrylic acid monomer pre-emulsified stock solution;

[0037] 2) Prepare seed emulsion:

[0038] At room temperature and a stirring rate of 300-400r / min, in reactor B, add 60.00-75.00 parts of water and 1.40-2.70 parts of polymerizable emulsifier, then raise the temperature to 75-80°C, and then add the aqueous initiator solution ...

Embodiment 1

[0046] A core-shell structure silicone acrylic emulsion, characterized in that: it is prepared from the following components in the following parts by weight:

[0047]

[0048] A method for preparing a core-shell structure silicon-acrylic emulsion, which is prepared from the following raw materials according to the following weight ratio:

[0049] 1) Preparation of acrylic acid monomer pre-emulsion stock solution:

[0050] 60.00 parts of water, 2.29 parts of polymerizable emulsifier, 0.45 parts of initiator, 10.00 parts of methyl methacrylate, 70.00 parts of butyl acrylate, 75.00 parts of styrene and 2.00 parts of acrylic acid monomer were added to In reactor A, disperse for 20 minutes at a stirring speed of 1000r / min to obtain acrylic acid monomer pre-emulsified stock solution;

[0051] 2) Prepare seed emulsion:

[0052] At room temperature and a stirring speed of 300r / min, in reactor B, add 60.00 parts of water and 1.40 parts of polymerizable emulsifier, then heat up to...

Embodiment 2

[0060] A core-shell structure silicone acrylic emulsion, characterized in that: it is prepared from the following components in the following parts by weight:

[0061]

[0062]

[0063] A method for preparing a core-shell structure silicon-acrylic emulsion, which is prepared from the following raw materials according to the following weight ratio:

[0064] 1) Preparation of acrylic acid monomer pre-emulsion stock solution:

[0065] 75.00 parts of water, 3.97 parts of polymerizable emulsifier, 0.70 parts of initiator, 15.00 parts of methyl methacrylate, 60.00 parts of butyl acrylate, 65.00 parts of styrene and 5.00 parts of acrylic acid monomer were added to In reactor A, disperse at a stirring speed of 1200r / min for 20-30 minutes to obtain acrylic acid monomer pre-emulsified stock solution;

[0066] 2) Prepare seed emulsion:

[0067] At room temperature and a stirring speed of 400r / min, in reactor B, add 75.00 parts of water and 2.70 parts of polymerizable emulsifier, ...

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Abstract

The invention relates to a silicone acrylic emulsion having a core-shell structure and a preparation method thereof. The silicone acrylic emulsion comprises the following components: methyl methacrylate, butyl acrylate, styrene, acrylic acid, a polymerisable environment-friendly emulsifier, an initiator, water, organosilicon and ammoniacal liquor. The silicone acrylic emulsion has the following advantages that a soap-free emulsion is employed for polymerization, the selected polymerisable environment-friendly emulsifier does not contain APE and formaldehyde, the emulsifier participates in a monomer polymerization process, emulsifier impurity in the silicone acrylic emulsion can be reduced, water resistance of the emulsion is greatly increased; in addition, the silicone acrylic emulsion has excellent characteristics of an acrylate polymer and an organosilicon polymer, the organosilicon monomer is employed for modifying the acrylate polymer, so that the disadvantages of poor water resistance performance, brittle condition due to low temperature and viscosifying / strength losing due to high temperature can be overcome. The organosilicon polymer as a shell can enhance the high / low temperature-resistant performance of the emulsion, and has the advantages of low surface energy and good water resistance performance.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a silicon-acrylic emulsion with a core-shell structure and a preparation method thereof. Background technique [0002] Polyacrylate emulsion is widely used in the production of latex paint for building interior walls, exterior walls, ceilings and ground coatings due to its rich source of raw materials, low price, good film-forming properties, high strength, good weather resistance, and strong adhesion. . Although acrylic resin has excellent film-forming properties and weather resistance, its disadvantages such as poor moisture permeability and water resistance, and poor low-temperature toughness limit its application in the field of architectural exterior wall coatings. [0003] Compared with polyacrylate, silicone resin is based on siloxane bond (Si-O-Si) as the main bond, its bond energy is 452.5kJ / mol, which is higher than carbon-carbon bond, and the bond length ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/14C08F220/06C08F230/08C08F2/26C08F2/30C09D125/14C09D133/08
Inventor 洪杰王艳
Owner SKSHU PAINT