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Preparation method for concrete release agent

A technology of concrete release agent and mixed solvent, which is applied in the direction of base material, petroleum industry, lubricating composition, etc. It can solve the problems of difficult peeling, mold adhesion, and poor release effect of the release agent, so as to achieve difficult peeling and reinforcement Clogging, the effect of improving the surface water-repellent effect

Pending Publication Date: 2019-07-12
陈蓉蓉
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Problems solved by technology

[0007] The technical problem to be solved by the present invention: aiming at the problem that the demoulding effect of the current demoulding agent is poor, and it is easy to adhere to the mold and not easy to peel off, the present invention improves a preparation method of a concrete demoulding agent

Method used

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  • Preparation method for concrete release agent

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preparation example Construction

[0030] The preparation method of the additive is as follows: ball mill microcrystalline cellulose, calcium stearate soap, water, ethanolamine and propylene glycol fatty acid ester at a mass ratio of 8 to 12:2:3:2 to 4:3 at 500 r / min, and filter , Collect the filter residue and dry at 50°C for 1 hour to obtain the additive.

[0031] Catalyst A is formed by mixing lithium hydroxide and dibutyltin dilaurate at a mass ratio of 3:1-3.

[0032] The chain extender is any one of 1,4-butanediol and methyldiethanolamine.

[0033] The initiator is any one of benzoyl peroxide and potassium persulfate.

[0034] The cross-linking agent is formed by mixing trimethylolpropane and pentaerythritol in a mass ratio of 3:2-4.

[0035] A preparation method of concrete release agent, the preparation method may further comprise the steps:

[0036] (1) Put tung oil, mixed solvent and additives into the reaction kettle at a mass ratio of 7-9:14-16:2-6, preheat at 50°C for 40 minutes, add a catalyst ...

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Abstract

The invention belongs to the technical field of concrete, and particularly relates to a preparation method of a concrete release agent. The method comprises the steps that tung oil as a basic raw material is mixed with a mixed solvent, under the action of a catalyst, an esterification reaction is carried out first, and an ester mixture partly containing benzene ring derivatives is formed; under the action of strong acid, the ester mixture and ethyl alcohol are subjected to an alkylation reaction so that the hydrophobic performance can be effectively improved; the mixture obtained in the last step is mixed with a mixed monomer and the like, and under the actions of an initiator, a catalyst and the like, polymerization is conducted. In the polymerization process, grafting of modified tung oil is achieved, crosslinking is conducted by using a cross-linking agent, and therefore, the preparation method for the concrete release agent is implemented. The problems are effectively solved that the release efficiency of an existing release agent is poor, and the existing release agent easily adheres to a mould and is not prone to stripping.

Description

technical field [0001] The invention belongs to the technical field of concrete, and in particular relates to a preparation method of a concrete release agent. Background technique [0002] 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 two, so it is also called release agent. [0003] In the construction of concrete engineering, the surface of concrete components often has quality defects such as honeycomb pitting, missing corners, and exposed ribs, and its oxidation resistance and weathering degree are low. In order to solve these problems, the construction unit carried out secondary treatment on the concrete surface, but it was easy to peel off and failed t...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10M109/02C08G18/48C08G18/76C08G18/32C08G18/36C08G18/66C10N40/36C10N30/04C10N30/06
CPCC10M169/044C10M109/02C08G18/4833C08G18/7614C08G18/3206C08G18/3228C08G18/36C08G18/6696C10M2209/12C10M2207/126C10M2215/042C10M2207/283C10M2217/065C10M2217/04C10N2030/04C10N2030/06C10N2010/04C10N2040/36Y02W30/91
Inventor 陈蓉蓉
Owner 陈蓉蓉
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