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Special demoulding agent for concrete and preparation method thereof

A release agent and concrete technology, which is applied in manufacturing tools, petroleum industry, ceramic molding machines, etc., can solve problems such as the contradiction between release performance and stability, and achieve the effect of improving appearance and excellent release performance.

Active Publication Date: 2017-05-17
JIANGSU SOBUTE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of contradictory release performance and stability of existing concrete release agents, the invention provides a special release agent for concrete and a preparation method thereof

Method used

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  • Special demoulding agent for concrete and preparation method thereof
  • Special demoulding agent for concrete and preparation method thereof
  • Special demoulding agent for concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take 480g of water, 0.4g of sodium hydroxide, 16.7g of the mixture of SE-10N and Tween 60 and add them into the reaction kettle 1, and stir at room temperature for 30min at a rotation speed of 3000rpm.

[0032] Glyceryl trioleate 200g, methacryloxypropyltrimethoxysilane 20g, No. 5# liquid paraffin 10g, initiator NaPS 0.1g, SE-10N and Tween 60 mixture 33.4g and water 240g were added to In the reaction kettle 2, the pre-emulsion was obtained by stirring at room temperature for 30 minutes under the condition of 3000 rpm.

[0033] The prepared pre-emulsion was added dropwise into Reactor 1 for 30 minutes and reacted for 2 hours. Continue to heat up the emulsion to 60°C. After reacting for 2 hours, continue to add 0.5 g of mineral oil defoamer, stop heating, and wait for natural cooling to obtain the special release agent for concrete.

[0034] Dilute to about 10% solid content for use. After the JC / T945-2005 standard test, the demoulding effect is good, and the concrete a...

Embodiment 2

[0036] Take 385g of water, 0.6g of sodium hydroxide, SR-10 and 23g of the mixture of fatty alcohol and ethylene oxide condensate MOA-3 into the reaction kettle 1, and stir at room temperature for 30min at a speed of 3000rpm. 250g of butyl oleate, 50g of methacryloxypropyltriethoxysilane, 50g of 15# liquid paraffin, 0.2g of initiator NaPS, SR-10 and MOA- 3. Add 46 g of the mixture and 192.5 g of water into Reactor 2 and stir at room temperature for 30 min at 3000 rpm to obtain a pre-emulsion.

[0037] The prepared pre-emulsion was added dropwise into Reactor 1 for 45 minutes and reacted for 2 hours. Continue to heat up the emulsion to 60°C. After reacting for 3 hours, continue to add 0.6 g of mineral oil defoamer, stop heating, and wait for natural cooling to obtain the special release agent for concrete.

[0038] Dilute to about 10% solid content for use. After the JC / T945-2005 standard test, the demoulding effect is good, and the concrete adhesion after demoulding is 1.7g / m...

Embodiment 3

[0040] Take 299g of water, 0.8g of sodium hydroxide, 33.3g of a mixture of COPS-2 and castor oil polyoxyethylene ether EL-60, and add it to Reactor 1, and stir at room temperature for 30min at a speed of 3000rpm.

[0041] Mix amyl oleate 300g, methacryloxypropyl triisopropoxysilane 80g, No. 26# liquid paraffin 70g, initiator NaPS 0.3g, COPS-2 and castor oil polyoxyethylene ether EL-60 66.6g and 149.5g of water were added into Reactor 2 and stirred at room temperature for 30min at 3000rpm to obtain a pre-emulsion.

[0042] Add the prepared pre-emulsion dropwise into the reaction kettle 1, the dropwise addition time is 1h, and react for 2h. Continue to heat up the emulsion to 70°C. After reacting for 4 hours, continue to add 0.8 g of mineral oil defoamer, stop heating, and wait for natural cooling to obtain the special release agent for concrete.

[0043]Dilute to about 10% solid content for use. After the JC / T945-2005 standard test, the demoulding effect is good, and the conc...

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Abstract

The invention discloses a special demoulding agent for concrete and a preparation method thereof. The demoulding agent is prepared from the following raw materials in percentage by weight: 20-40% of oleate, 2-10% of silane, 1-12% of liquid paraffin, 5-16% of emulsifying agents, 0.01-0.5% of initiators, 0.04-0.1% of pH regulators, 0.05-0.1% of defoaming agents and the balance of water. The preparation method of the special demoulding agent for the concrete comprises the following steps: forming a pre-emulsion by using oily components including the oleate, the silane and the liquid paraffin and the emulsifying agents under 3000rpm, hydrolyzing and polycondensing part of the silane to form cross-linking bonds, and constraining hydrophobic molecules such as active oleic acid and the like by using C=C double-bond addition reaction under the condition of heating at 60-80 DEG C to form an environment-friendly demoulding agent emulsion which can be stably stored for 24 months or longer. The special demoulding agent for the concrete is capable of effectively improving the appearance of the concrete and enabling the surface of the concrete to be smooth, free of bubbles and free of ash.

Description

technical field [0001] The invention relates to a release agent, in particular to a special release agent for concrete and a preparation method thereof. Background technique [0002] With the rapid development of the construction industry, the application of in-situ casting and concrete prefabrication is increasing. In the process of concrete casting and forming, if the product is stuck to the formwork, it will not only easily damage the product, but also cause demolition. Difficulty with mold cleaning. The use of concrete release agent can reduce or prevent the adhesion between concrete and formwork surface, easy demoulding and mold cleaning, improve labor productivity and ensure the quality of prefabricated parts. [0003] The early concrete release agents are mainly divided into two types of substances, one is thin film solid substances, such as paper and plastic cloth, etc., which have been basically eliminated due to seriously affecting the quality of components. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M173/00B28B7/38C10N40/36
CPCB28B7/384C10M173/00C10M2203/10C10M2207/281C10M2207/283C10M2209/104C10M2229/046C10N2040/36
Inventor 蒋永菁李磊王瑞王文彬韩旭
Owner JIANGSU SOBUTE NEW MATERIALS
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