Long-acting concrete water-based mold release agent suitable for steel mold and preparation method of mold release agent

A concrete and release agent technology, applied in the field of chemical building materials, can solve the water resistance and long-term evaluation of water-based release agents, general evaluation, reusability and erosion resistance evaluation, long-term and reusable performance evaluation, etc. problems, achieve the effect of improving appearance quality, enhancing coating performance and isolating lubrication performance, and overcoming construction difficulties

Inactive Publication Date: 2020-02-18
CHINA WEST CONSTR GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing concrete water-based release agents have strong hydrophilicity and poor water erosion resistance, are not suitable for rainy and humid construction environments, and are difficult to reuse during application, thereby increasing the work cost
[0004] Patent CN107603704A discloses a water-based release agent for fair-faced concrete, which has good demoulding effect and good stability, but does not evaluate its reusability and erosion resistance, and the preparation process is complicated, requiring extraction, vacuum distil

Method used

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  • Long-acting concrete water-based mold release agent suitable for steel mold and preparation method of mold release agent

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Experimental program
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Effect test

Embodiment 1

[0029] A preparation method of a long-acting concrete water-based release agent suitable for steel molds, the detailed steps are as follows:

[0030] (1) Weigh 100.0g of vegetable oil (rapeseed oil), 5.0g of octadecyltrimethoxysilane, and 1.0g of aminopropyltriethoxysilane and mix them uniformly, and stir at a constant temperature for 20min to obtain a modified film-forming aid. vegetable oil;

[0031] (2) Add 12.5g sodium dodecylbenzenesulfonate, 12.5g Span-80, 18.75g Tween-80 and 1.0g stabilizer to the modified vegetable oil obtained in step (1) and mix with each other, constant temperature shear dispersion 40min, shear rate 3500 / min, then add 1000g water and stir to obtain vegetable oil emulsion;

[0032] (3) Add 0.5 g of triethanolamine and 0.5 g of sodium benzoate to the vegetable oil emulsion obtained in step (2), stir evenly and adjust the pH to about 9.0 to obtain a concrete water-based release agent.

Embodiment 2

[0034] A preparation method of a long-acting concrete water-based release agent suitable for steel molds, the detailed steps are as follows:

[0035] (1) Weigh 50.0g of vegetable oil (rapeseed oil), 2.0g of hexadecyltrimethoxysilane, and 0.5g of aminopropyltriethoxysilane and mix them uniformly, and stir at a constant temperature for 20min to obtain a modified film-forming aid. vegetable oil;

[0036] (2) Add 7.5g sodium dodecylbenzenesulfonate, 7.5g Span-80, 15g Tween-80 and 1.0g stabilizer to the modified vegetable oil obtained in step (1) and mix with each other, and then shear and disperse at a constant temperature for 40min , shear rate 3000 / min, then add 480g water and stir to obtain vegetable oil emulsion;

[0037] (3) Add 0.3 g of triethanolamine and 0.1 g of sodium benzoate to the vegetable oil emulsion obtained in step (2), stir evenly and adjust the pH to about 9.0 to obtain a concrete water-based release agent.

Embodiment 3

[0039] A preparation method of a concrete water-based release agent suitable for steel molds, the detailed steps are as follows:

[0040] (1) Weigh 40.0g soybean oil and 40.0g rapeseed oil, 2.0g dodecyltrimethoxysilane, 2.0g octadecyltrimethoxysilane, 0.8g aminopropyltriethoxysilane and mix with each other Evenly, stir at a constant temperature for 20 minutes to obtain a film-forming aid modified vegetable oil;

[0041] (2) Add 10.0 g of sodium dodecylbenzene sulfonate, 10.0 g of Span-80, 15.0 g of Tween-80 and 0.8 g of stabilizer to the modified vegetable oil obtained in step (1) and mix with each other, and shear and disperse at a constant temperature for 40 min , shear rate 3000 / min, then add 1000g water and stir to obtain vegetable oil emulsion;

[0042] (3) Add 0.2 g of triethanolamine and 0.2 g of sodium benzoate to the vegetable oil emulsion obtained in step (2), stir evenly and adjust the pH to about 9.0 to obtain a concrete water-based release agent.

[0043] 2. Rel...

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Abstract

The invention belongs to the technical field of chemical building materials, and particularly relates to a long-acting concrete water-based mold release agent suitable for a steel mold and a preparation method of the mold release agent. Aiming at the problems, the invention mainly overcomes the defects in the prior art, and provides the long-acting concrete water-based mold release agent suitablefor the steel mold and the preparation method of the mold release agent; the long-acting concrete water-based mold release agent comprises the following components: vegetable oil, a coalescing agent,a compound emulsifier, a stabilizer, a corrosion inhibitor and water, wherein the coalescing agent comprises a long-chain alkyl silane coupling agent and aminopropyltriethoxysilane. The prepared concrete water-based mold release agent is stable in performance, good in water scouring resistance and good in reusability, and the apparent mass of hardened concrete can be effectively improved.

Description

technical field [0001] The invention belongs to the technical field of chemical building materials, and in particular relates to a long-acting concrete water-based release agent suitable for steel molds and a preparation method thereof. Background technique [0002] Concrete release agent, also known as concrete release agent, is a functional material between formwork and concrete that can isolate and lubricate. The use of release agent can effectively reduce the distance between concrete and formwork. Adhesion, so that the concrete can be removed from the formwork smoothly when the formwork is removed, and the shape is kept intact and clean. At present, there are various types of release agents at home and abroad, and it is necessary for the construction industry to choose a good and suitable concrete release agent for different use situations. Traditional machine oil, mineral oil or animal and vegetable oil are used as mold release agents, although the mold release effect...

Claims

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Application Information

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IPC IPC(8): C10M173/00C10M177/00C10N30/04C10N30/12C10N40/36
CPCC10M173/00C10M177/00C10M2207/141C10M2207/289C10M2207/401C10M2209/104C10M2209/108C10M2215/042C10M2219/044C10M2227/04
Inventor 高育欣杨文刘明陈景袁彬钦叶子张磊
Owner CHINA WEST CONSTR GRP
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