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Acrylic emulsion for fiber cement board and preparation method thereof

A technology of acrylic emulsion and fiber cement board, which is applied in the field of acrylic emulsion to improve performance, reduce molecular weight, and increase specific surface area

Active Publication Date: 2019-02-22
佛山市顺德区巴德富实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, it is necessary to develop an acrylic emulsion for fiber cement board, and there is no such application product on the market

Method used

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  • Acrylic emulsion for fiber cement board and preparation method thereof
  • Acrylic emulsion for fiber cement board and preparation method thereof

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preparation example Construction

[0036] In addition, the present invention also provides the preparation method of the acrylic acid emulsion for fiber cement board, comprising the following steps:

[0037] 1) Pre-emulsification: Under normal temperature and pressure, mix the anionic emulsifier and 30-40 parts of water in the pre-emulsification tank, fully stir and dissolve, and add the styrene, isooctyl acrylate, acrylic acid, Molecular weight modifier to obtain pre-emulsion;

[0038] 2) Polymerization: add 120-170 parts of water to the bottom of the reaction kettle, heat up to 80-90°C, stir for 20-40 minutes, first drop 0.1-0.8 parts of initiator within 5-10 minutes, and then directly drop Step 1) The obtained pre-emulsion, the dropwise addition time is 150-210 minutes, and the reaction temperature is 80-90°C;

[0039] Wherein, when the pre-emulsion has been added dropwise by 40%-60%, stop adding the remaining pre-emulsion and the remaining initiator, and put the chelating agent of the formula amount into t...

Embodiment 1

[0043] An acrylic emulsion for fiber cement board, comprising the following components in parts by mass: 180 parts of water, 50 parts of styrene, 35 parts of isooctyl acrylate, 0.5 part of acrylic acid, 1 part of anionic emulsifier, and 5 parts of chelating agent 0.5 part of molecular weight modifier, 0.2 part of initiator, 0.1 part of oxidizing agent, and 0.1 part of reducing agent.

[0044] The anionic emulsifier is sodium lauryl sulfate. Described chelating agent is ethylenediaminetetraacetic acid.

[0045] The molecular weight regulator is tertiary dodecyl mercaptan. The initiator is sodium persulfate.

[0046] As an improvement, the oxidizing agent adopts an organic peroxide. The reducing agent is sodium binitrite.

[0047] In addition, the present invention also provides the preparation method of the acrylic acid emulsion for fiber cement board, comprising the following steps:

[0048] 1) Pre-emulsification: Under normal temperature and pressure, mix the anionic emu...

Embodiment 2

[0054] An acrylic emulsion for fiber cement boards, comprising the following components in parts by mass: 260 parts of water, 60 parts of styrene, 45 parts of isooctyl acrylate, 5 parts of acrylic acid, 5 parts of anionic emulsifier, and 10 parts of chelating agent 1.5 parts of molecular weight modifier, 1 part of initiator, 0.5 part of oxidizing agent, and 0.5 part of reducing agent.

[0055] As an improvement, the anionic emulsifier is sodium dodecylbenzenesulfonate. Described chelating agent is aminotriacetic acid.

[0056] The molecular weight regulator is 2,4-diphenyl-4-methyl-1-pentene. The initiator is ammonium persulfate.

[0057] The oxidizing agent adopts organic peroxide. The reducing agent is vitamin C.

[0058] The preparation method of the acrylic acid emulsion that is used for fiber cement board, comprises the following steps:

[0059] 1) Pre-emulsification: Under normal temperature and pressure, mix the anionic emulsifier and 40 parts of water in the pre-e...

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Abstract

The invention discloses acrylic emulsion for a fiber cement board and belongs to the field of acrylic emulsion. The acrylic emulsion is prepared from the following components in parts by mass: 180 to260 parts of water, 50 to 60 parts of styrene, 35 to 45 parts of isooctyl acrylate, 0.5 to 5 parts of acrylic acid, 1 to 5 parts of an anion emulsifier, 5 to 10 parts of a chelating agent, 0.5 to 1.5parts of a molecular weight regulator, 0.2 to 1 part of an initiator, 0.1 to 0.5 part of an oxidant and 0.1 to 0.5 part of a reducing agent. The acrylic emulsion provided by the invention has good anti-filtering performance, excellent water absorption resistance rate and excellent primer adhesive force; and the flexibility of sheet materials is improved and an application field of the acrylic emulsion is expanded.

Description

technical field [0001] The invention relates to an acrylic emulsion used for fiber cement boards and a preparation method thereof, belonging to the field of acrylic emulsion. Background technique [0002] Due to the convenience and environmental protection of construction, traditional architectural coatings have been greatly impacted. Fiber cement board is a new type of architectural coating material born under this environment. The construction process of traditional architectural coatings is mainly divided into base treatment, putty, polishing, second putty, polishing, primer, intermediate layer, and top coat. The process is complicated and cumbersome, and the influence of construction environment and construction weather needs to be considered. For fiber cement boards, during the manufacturing process in the workshop, fiber cement boards can be pressed into different textures on the surface of the board through different molds. Coating or artistic coating can meet the ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/18C08F220/06C08F2/26C08F2/38C08F2/44
CPCC08F2/26C08F2/38C08F2/44C08F212/08C08F220/1808C08F220/06
Inventor 成煬霈张彩媚
Owner 佛山市顺德区巴德富实业有限公司
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