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Concrete release agent and preparation method thereof

A concrete mold release agent and mold release technology, applied in the field of building materials, can solve problems such as poor mold release effect, and achieve the effects of slowing down premature evaporation, preventing damage and preventing corrosion

Inactive Publication Date: 2019-08-23
谷银香
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a concrete release agent and its preparation method in view of the poor release effect of the current release agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation method of the mold release active agent is as follows: take cottonseed oil at a mass ratio of 3-7:6-10, add 20% sodium hydroxide solution, heat up to 80-90°C and stir and mix for 20-30 minutes to obtain the mixture. Add citric acid to the alcohol additive at a mass ratio of 3~5:2~4, raise the temperature to 120~140°C and stir and mix for 50~70 minutes, then add a mixture of 2~4 times the mass of the alcohol additive, and keep it warm at 130~140°C for 20~30 minutes. Cool to room temperature, filter, and take the filtrate to obtain the release active agent.

[0031] The active gum is as follows: take gelatin and add xanthan gum in a mass ratio of 3~6:2~5 and mix to obtain.

[0032]The preparation method of the self-healing additive is: take the active gum and add polyvinyl alcohol at a mass ratio of 8-10:10-15, stir and mix at 500r / min for 30-40min to obtain a stirred mixture, and take tung oil at a mass ratio of 4-8:3 ~5:20~30 Add polysulfone and methyle...

Embodiment 1

[0042] Epoxidized soybean oil: epoxy value 0.4.

[0043] The alcohol additive is: take n-decyl alcohol and add n-octanol in a mass ratio of 3:2 to mix.

[0044] The preparation method of the mold release active agent is as follows: take cottonseed oil in a mass ratio of 3:6, add a 20% sodium hydroxide solution, heat up to 80°C and stir and mix for 20 minutes to obtain a mixture, and add an alcohol additive in a mass ratio of 3:2 For citric acid, heat up to 120°C and stir and mix for 50 minutes, then add a mixture twice the mass of the alcohol additive, keep warm at 130°C for 20 minutes, cool to room temperature, filter, and take the filtrate to obtain the release active agent.

[0045] The active gum is: take gelatin and add xanthan gum in a mass ratio of 3:2 and mix it to get it.

[0046] The preparation method of the self-healing additive is: take the active gum and add polyvinyl alcohol in a mass ratio of 8:10, stir and mix at 500r / min for 30 minutes to obtain a stirred mi...

Embodiment 2

[0056] Epoxidized soybean oil: epoxy value 0.4.

[0057] The alcohol additive is: take n-decyl alcohol and mix it with n-octanol at a mass ratio of 5:3.

[0058] The preparation method of the release active agent is as follows: take cottonseed oil in a mass ratio of 5:8, add a 20% sodium hydroxide solution, heat up to 85°C and stir and mix for 25 minutes to obtain a mixture, and take an alcohol additive in a mass ratio of 4:3 Add citric acid, raise the temperature to 130°C, stir and mix for 60 minutes, then add a mixture with 3 times the mass of alcohol additive, keep it at 135°C for 25 minutes, cool to room temperature, filter, and take the filtrate to obtain the release active agent.

[0059] The active gum is: take gelatin and add xanthan gum in a mass ratio of 4:3 and mix it.

[0060] The preparation method of the self-healing additive is as follows: take the active gum and add polyvinyl alcohol at a mass ratio of 9:13, stir and mix at 500r / min for 35 minutes to obtain a ...

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PUM

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Abstract

The invention discloses a concrete release agent and a preparation method thereof, and belongs to the field of building materials. A release active agent adopted in the preparation method is obtainedby taking cottonseed oil as a raw material and adding n-decanol and the like to carry out a reaction, carboxyl carried by the release active agent is subjected to a saponification reaction with a hydration product in concrete, meanwhile, surface hydrophobicity is increased by formed esteryl carboxylic acid with a long carbon chain structure, and the concrete potential is reduced, so that the concrete is well protected. According to a self-repairing additive adopted in the preparation method, gelatin and xanthan gum are bonded by polyvinyl alcohol to form a protective outer wall to inhibit corrosion to a release interface, and then durability of the concrete is influenced. A lubricating coating additive is adopted in the preparation method, epoxidized soybean oil and fluoropropyl-containingpolyhedral oligomeric silsesquioxane are polymerized, so that dust adhesion of a mold is reduced, and the de-molding effect is improved. The release active agent is added to improve flatness and a rust inhibitor is added for corrosion-preventing protection, so that use performance of the concrete is enhanced. According to the invention, the problem that an existing release agent is poor in mold release effect is solved.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a concrete release agent and a preparation method thereof. Background technique [0002] Concrete refers to an engineering composite material in which the aggregate is cemented into a whole by a cementitious material. Concrete has become the material with the largest amount and the widest range of use because of its series of advantages, such as superior plasticity, good water resistance, excellent durability and very competitive economy. During the construction of concrete, a release agent is required. Concrete release agent refers to a substance applied on the construction formwork before concrete pouring, so that the formwork will not stick to the concrete surface after pouring, it will not be easy to remove the formwork, or affect the smoothness of the concrete surface. Its main function is to form a film on the surface of formwork and concrete to isolate the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M173/00C10M177/00B28B7/38C10N40/36
CPCB28B7/384C10M173/00C10M177/00C10M2201/102C10M2207/283C10M2207/289C10M2207/30C10M2207/40C10M2209/04C10M2209/104C10M2209/108C10M2209/12C10M2215/042C10M2221/00C10M2223/04C10M2227/04C10M2229/051C10N2040/36
Inventor 谷银香
Owner 谷银香
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