Demoulding agent used for precast concrete component and preparation method thereof

Abstract

The invention discloses a demoulding agent used for precast concrete components. The demoulding agent includes following raw materials, by weight, 10-30 parts of an unsaturated fatty acid, 5-20 parts of an oily density adjusting agent and an aqueous density adjusting agent, 1-5 parts of an oily emulsifier, 1-5 parts of an aqueous emulsifier, 0.1-4 parts of an emulsification additive, 0.1-2 parts of a defoaming agent, 0.1-2 parts of an anti-rust agent, 1-5 parts of a settling-resistant and thickening thixotropic agent and 40-65 parts of water. The unsaturated fatty acid is oleinic acid, palmitoleic acid or ricinoleic acid. The emulsification additive has a structure formula represented as follows, wherein R1 is H or CH3, R2 is CONH2, CH2SO3Na or COOM, the x, the y, the a and the b are linking numbers of a copolymer repetitive unit and are ranged from 1 to 10, the m and the n are addition mole average numbers and are ranged from 10-50, wherein M is a hydrogen atom, a monovalent metal ion, an amino group or an organic ammonium group. The demoulding agent is low in cost, is free of generation of oil contamination, is long in storage time, is not liable to decay, deteriorate and layer, and is free of influence on surface and internal quality of concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a release agent for concrete prefabricated components and a preparation method thereof. Background technique [0002] Concrete release agent, also known as concrete release agent, is sprayed on the inner wall of concrete formwork to lubricate and isolate, so that the formwork can be removed smoothly. Concrete release agents are mainly divided into seven categories, namely: pure oil release agents, emulsified oil release agents, saponified oil release agents, paraffin and metal soap release agents, chemically active release agents, Paint release agent and synthetic resin film coating agent. However, the use of pure oil release agents is prone to oil stains, which has a certain impact on the surface and internal quality of concrete; the use of soap release agents, although the price is low, is easy to deteriorate after storage, and will cause the concrete su...

AI Technical Summary

Problems solved by technology

However, the use of pure oil release agents is prone to oil stains, which has a certain impact on the surface and internal quality of concrete; the use of soap release agents, although the price is low, is easy to deteriorate after storage, and will cause the concrete surface to depowder more easily. Serious; the use of paint and synthetic ester release agents will cause damage to the coating and make it difficult to repaint and clean the mold.

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