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A kind of concrete water-based release agent and preparation method thereof

A release agent and concrete technology, applied in the field of chemical building materials, can solve problems such as poor stability, and achieve the effects of simple operation, improved appearance quality, and good storage stability

Active Publication Date: 2022-01-04
CHINA WEST CONSTR GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention aims at the problem of poor stability of the existing concrete water-based release agent, to provide a highly stable concrete water-based release agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Method for preparing aqueous concrete release agent, the following detailed steps:

[0023] (1) Preparation of an emulsion stabilizer: Weigh 50.0g 171.3g octadecyl vinyl ether and stearyl methacrylate evenly mixed, was added 1.71g benzoyl peroxide, oil bath temperature 60 ℃ conditions reaction 8h, to give a copolymer emulsion of octadecyl vinyl ether and stearyl methacrylate, i.e. stabilizers.

[0024] (2) Preparation of the oil emulsion: oil weighed 95.0g (Grade 5W-20), 19.28g Span-80,22.15gTween-80, and 1.9g Step (1) Preparation of a stabilizer, the four will be mixed and cut cut dispersion 60min, a shear rate of 3000r / min, followed by addition of 950g of water, to give an emulsion of oil, oil emulsion particle size of 200 ~ 300nm.

[0025] (3) step (2) oil emulsion obtained was added 0.95g 0.57g calcium nitrite and propylene glycol and mix to obtain a highly stable aqueous concrete release agent.

Embodiment 2

[0027] Method for preparing aqueous concrete release agent, the following detailed steps:

[0028] (1) Preparation of an emulsion stabilizer: Weigh 30.0g 171.3g octadecyl vinyl ether and stearyl methacrylate evenly mixed, was added benzoyl peroxide and azobisisobutyronitrile like mass mixed 5.13 g of the mixture, the reaction in an oil bath at a temperature of 80 ℃ 6h, to give octadecyl vinyl ether, octadecyl acrylate and methacrylic acid copolymer emulsion, namely stabilizer.

[0029] (2) Preparation of the oil emulsion: oil weighed 58.0g (Grade 10W-20), 19.3g Span-80,19.3gTween-80 and 0.58g Step (1) Preparation of a stabilizer, the four will be mixed and cut cut dispersion 60min, a shear rate of 3500r / min, followed by addition of 464g of water, to give an emulsion of oil, oil emulsion particle size of 250 ~ 300nm.

[0030] (3) step (2) oil emulsion obtained 0.12g 0.58g sodium benzoate and sodium carboxymethylcellulose was added and stirred uniformly to obtain highly stable aqu...

Embodiment 3

[0032] Method for preparing aqueous concrete release agent, the following detailed steps:

[0033] (1) Preparation of an emulsion stabilizer: Weigh 21.2g 170.0g dodecyl vinyl ether and stearyl methacrylate evenly mixed, was added 5.1g of dimethyl azobisisobutyrate, in an oil bath the reaction at a temperature of 80 ℃ for 8h, to give a copolymer emulsion of octadecyl vinyl ether and dodecyl methacrylate, i.e. stabilizers.

[0034] (2) Preparation of the oil emulsion: oil weighed 58.0g (mixed oil grade 10W-20 and 15W-20 and the like mixed mass), 19.3g Span-80,19.3g Tween-80, and 1.2g Step (1) Preparation of stabilizers, to the four mixing, shear dispersing 60min, a shear rate of 3000r / min, followed by addition of 464g of water, to give an emulsion of oil, oil emulsion particle size of 200 ~ 250nm.

[0035] (3) step (2) oil emulsion obtained 0.12g 0.58g sodium benzoate and sodium carboxymethylcellulose was added and stirred uniformly to obtain highly stable aqueous concrete release...

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Abstract

The invention discloses a concrete water-based release agent, which is characterized in that the release agent uses a copolymer of long-chain alkyl vinyl ether and stearyl methacrylate as a stabilizer. The release agent consists of the following components: Stabilizer, Oil, Span‑80, Tween‑80, Rust Inhibitor, Coalescing Aid, and Water. The preparation method of the release agent is as follows: S1. Preparation of the stabilizer: mix the long-chain alkyl vinyl ether and octadecyl methacrylate, add the initiator, keep the temperature at 60-80°C, and carry out the copolymerization reaction for 6-8 hours to obtain Copolymer emulsion, namely stabilizer; S2, prepare engine oil emulsion: mix engine oil, Span‑80, Tween‑80 and stabilizer, shear and disperse, then add water, obtain engine oil emulsion; S3, get to step S2 Add rust inhibitors and film-forming aids to the engine oil emulsion, and stir evenly to obtain a concrete water-based release agent. The concrete water-based release agent prepared by the invention has stable performance, long storage time, and can obviously improve the apparent quality of hardened concrete.

Description

Technical field [0001] The present invention belongs to the technical field of chemical building materials, concrete relates to an aqueous release agent and preparation method of long-chain alkyl vinyl ether, octadecyl acrylate and methacrylic acid copolymer stabilizer. Background technique [0002] With the development of building industrialization, the apparent quality of precast concrete have become increasingly demanding. In prefabricated form removal process, the surface member Honeycomb often occurs, chipping, exposed tendons and other defects, not only affects the apparent effect of the member, but also result in reduction of durability of the member. To solve this problem, the construction unit needs to be fixed on the component surface treatment, but can not increase the apparent quality of the concrete from the source. Concrete release agent, also called concrete release agent coated on a surface of the template, produces isolation, effectively reducing the adhesion bet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M173/00C10M145/12B28B7/38C10N40/36
CPCC10M145/12C10M173/00B28B7/384B28B7/388C10M2209/04C10N2030/08C10N2040/36C10M2209/082
Inventor 王军高育欣刘明毕耀刘其彬张磊叶子贾二鹏
Owner CHINA WEST CONSTR GRP
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