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A kind of isolation release agent for concrete products and preparation method thereof

A technology of concrete products and mold release agents, applied in the direction of nanotechnology, lubricating composition, nanotechnology, etc. for materials and surface science, can solve problems such as unsuitable cleaning of molds, severe environments, pollution, etc., to protect the surface of molds, Overcoming environmental pollution problems, easy to use

Active Publication Date: 2021-08-17
HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used release agents include waxes, silicone oils, soaps, waste engine oil, etc., each with its own characteristics; and the commonly used release agents for concrete products are mainly waste engine oil release agents, which have serious environmental pollution and are not suitable for molds. Cleaning, the surface of the product is prone to micro pits caused by air bubbles, so it is urgent to develop a concrete product isolation release agent that overcomes the above defects

Method used

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  • A kind of isolation release agent for concrete products and preparation method thereof
  • A kind of isolation release agent for concrete products and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh 20 parts of silicone oil with an average viscosity of 1000cp, 20 parts of silicone oil with an average viscosity of 500cp, 8 parts of emulsifier Tween-60, 8 parts of Span-60, weigh 16 parts of deionized water, and weigh 2 parts of stearin Acid, 8 parts of ethanol, and 5 parts of anhydrous calcium chloride were prepared with deionized water to make a calcium chloride aqueous solution with a concentration of 0.5M, added to a reaction vessel with a stirring reflux device, and stirred at 45°C to form a transparent solution. According to the molar ratio of calcium ions to carbonate ions of 1:1, slowly add anhydrous sodium carbonate powder into the silicone oil-calcium chloride solution prepared above under stirring, and stir while adding. Foaming agent, heat up the system to 45-55°C, stir and reflux for 36 hours, add deionized water, stop heating, stir slowly, cool down and invert the phase, and obtain a silicone oil nano-calcium carbonate emulsion concrete with a solid...

Embodiment 2

[0025] Weigh 30 parts of silicone oil with an average viscosity of 1000cp, 1.5 parts of Tween-60, 1.5 parts of Span-60, 0.5 part of Tween-20, 0.5 part of Span-20 of emulsifier, and 8 parts of deionized water, weigh Take 0.8 parts of ethanol, 0.2 parts of polyvinyl alcohol, 0.3 parts of anhydrous calcium chloride and deionized water to make a calcium chloride aqueous solution with a concentration of 2.5M, add it into a reactor with a stirring reflux device, and stir at 50°C to form a transparent solution. Stir to form a clear solution. According to the molar ratio of calcium ions to carbonate ions of 1:1, slowly add anhydrous sodium carbonate powder or 0.5M aqueous sodium carbonate solution into the silicone oil-calcium chloride solution prepared above under stirring, and stir while adding, After the addition is complete, add 0.5 parts of defoamer, raise the temperature of the system to 55-65 ° C, stir and reflux for 24.0 hours, add deionized water, stop heating, stir slowly, c...

Embodiment 3

[0027] Weigh 35 parts of silicone oil with an average viscosity of 500cp, 7 parts of Tween 80, 7 parts of Span-80, 0.5 part of Tween-20, 0.5 part of Span-20, 15 parts of deionized water, and weigh 3 parts of ethanol, 2 parts of stearic acid, 0.5 part of sodium stearate, 3 parts of anhydrous calcium chloride are made into the calcium chloride aqueous solution that concentration is 2M with deionized water, add in the reactor with stirring reflux device, 50 °C to form a transparent solution. According to the molar ratio of calcium ions to carbonate ions of 1:1, slowly add anhydrous sodium carbonate powder or 2.5M aqueous sodium carbonate solution into the silicone oil-calcium chloride solution prepared above under stirring, and stir while adding, After the addition is complete, add 0.8 parts of defoamer, raise the temperature of the system to 65-75°C, stir and reflux for 20.0 hours, add deionized water, stop heating, stir slowly, cool down and invert the phase, and obtain a solid...

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Abstract

The invention discloses a preparation method of an isolation release agent for concrete products, which belongs to the field of concrete additives. It is prepared by the following method: firstly, W / O type active nano-calcium carbonate silicone oil composite emulsion is prepared from film-forming material, emulsifier, water-soluble salt calcium chloride and sodium carbonate, and then O / W type is obtained by adding water and phase inversion. Silicone oil nano calcium carbonate emulsion. The emulsion is suitable for the isolation between raw materials and molds during the processing of concrete products. It can make the surface of the mold easy to clean. The addition of nano-calcium carbonate can repair the micro-pit and damage on the surface of the mold, prolong the service life of the mold, and make the product The surface is smooth, the defects are reduced, and the yield is improved.

Description

technical field [0001] The invention relates to an isolation release agent for concrete products and a preparation method thereof, belonging to the field of concrete additives. Background technique [0002] As an important auxiliary agent in the molding process of concrete products, the release agent can improve the appearance and performance of the product and improve the quality of the product. Commonly used release agents include waxes, silicone oils, soaps, waste engine oil, etc., each with its own characteristics; and the commonly used release agents for concrete products are mainly waste engine oil release agents, which have serious environmental pollution and are not suitable for molds. Cleaning, the surface of the product is prone to micro-pits caused by air bubbles, so it is urgent to develop a concrete product isolation release agent that overcomes the above defects. [0003] Therefore, research and development of a high-solid content nano-calcium carbonate modifi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04B82Y40/00B82Y30/00C10N40/36C10N30/04
CPCB82Y30/00B82Y40/00C10M169/04C10M2201/062C10M2229/04C10N2010/04C10N2020/06C10N2030/04C10N2040/36
Inventor 褚艳红庄玉伟郭辉赵俊杰邢会华曹艳霞张国宝刘清曹键
Owner HIGH & NEW TECH RES CENT OF HENAN ACAD OF SCI
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