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Rock wool board water repellent agent and preparation method thereof

A technology of hydrophobic agent and rock wool board, which is applied in the field of silicone rock wool board hydrophobic agent and its preparation, can solve the problems of high production cost, complex process, unsatisfactory hydrophobic effect, etc., and achieve low production cost and short process flow , good adhesion and hydrophobic effect

Pending Publication Date: 2020-09-04
威县星华创新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The amount of hydrophobic agent for rock wool board is relatively large in China, but the current domestic product process is relatively complicated. The commonly used octamethylcyclotetrasiloxane (D4) has high production cost and the hydrophobic effect is not satisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of a rock wool board hydrophobic agent of the present embodiment, its raw materials include the following components: 10 parts of dodecylbenzenesulfonic acid, 5 parts of OP10, 1 part of stearyl alcohol, mixed with dimethylcyclosiloxane Body (D4 accounts for 75%, the rest is D2, D3) 85 parts, dibutyltin dilaurate 3 parts.

[0020] The method comprises the following steps: adding alkylphenol polyoxyethylene ether, octadecyl alcohol, and dodecylbenzenesulfonic acid into water, adding dimethylcyclosiloxane mixture to react after heating up to 75 degrees, and maintaining the temperature Condensation reaction was carried out for 5 hours; then dibutyltin dilaurate was added for cross-linking reaction, after about 3 hours of heat preservation, the temperature dropped below 30 degrees, and the pH value was adjusted to about 6 with sodium hydroxide aqueous solution.

[0021] The emulsion with a concentration of 40% was centrifuged at a high speed (4500 rpm, 5...

Embodiment 2

[0023] Compared with Example 1, the raw materials are 8 parts of dodecylbenzenesulfonic acid, 5 parts of OP10, 1 part of stearyl alcohol, 88 parts of dimethylcyclosiloxane mixture, and other conditions are the same.

[0024] 40% of the emulsion is centrifuged at high speed, the stability is improved, and the hydrophobic effect is better.

Embodiment 3

[0026] Compared with Example 1, the raw materials are 18 parts of dodecylbenzenesulfonic acid, 5 parts of OP10, 3 parts of stearyl alcohol, 88 parts of dimethylcyclosiloxane mixture, and other conditions are the same.

[0027] 40% of the emulsion is centrifuged at high speed, the stability is improved, and the hydrophobic effect is better.

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Abstract

The invention relates to a rock wool board water repellent agent and a preparation method thereof. The raw materials comprise the following components: dodecylbenzene sulfonic acid, alkylphenol ethoxylates, higher alcohols, dibutyltin dilaurate and a dimethyl cyclosiloxane mixture in a mass ratio of (5-10): (5-10): (1-5): (1-3): (70-90), and the content of D4 in the dimethyl cyclosiloxane mixtureis 70-78%. The method comprises the following steps: adding the alkylphenol ethoxylates, the higher alcohols and the dodecylbenzene sulfonic acid into water, heating to 65-80 DEG C, adding the dimethyl cyclosiloxane mixture, reacting, keeping the temperature for 4-6 hours, and carrying out condensation reaction; and adding the dibutyltin dilaurate to carry out crosslinking reaction, keeping the temperature for 2-4 hours, lowering the temperature to below 30 DEG C, and regulating the pH value to 4.5-6.5 by using a sodium hydroxide water solution. According to the invention, the cost is low, andthe product is endowed with better adhesiveness and hydrophobicity.

Description

technical field [0001] The invention relates to a hydrophobic agent for rock wool boards, in particular to an organic silicon rock wool board hydrophobic agent and a preparation method thereof. Background technique [0002] During the preparation process of the rock wool insulation board, a layer of hydrophobic agent should be sprayed on the surface of the fiber, and a layer of hydrophobic film will be formed on the surface of the fiber after finishing into a board and dried, which endows the rock wool insulation board with good hydrophobicity. [0003] The amount of hydrophobic agent for rock wool board is relatively large in China, but the current domestic product process is relatively complicated. The commonly used octamethylcyclotetrasiloxane (D4) has high production costs and the hydrophobic effect is not satisfactory. Contents of the invention [0004] In order to solve the above-mentioned problems, the present invention provides a method for preparing a water-repell...

Claims

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Application Information

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IPC IPC(8): C08G77/06C08G77/08C03C25/465C03C25/40C03C25/25C03C25/32
CPCC03C25/32C03C25/40C08G77/06C08G77/08C03C25/25C03C25/465
Inventor 张保庆康靖冯云利
Owner 威县星华创新材料有限公司
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