Interface agent, as well as preparation method and application thereof

Abstract

The invention relates to an interface agent. The interface agent is prepared from the following components by mass percent: 5-8.5% of n-butyl acrylate, 3-10.2% of methyl methacrylate, 0-1.2% of acrylic acid, 0-0.2% of initiator, 0.2-1.5% of composite emulsifier, 0-8% of epoxy resin, 61-78% of water, 4-8.2% of styrene, 0.3-1.5% of propylene glycol, and 0-0.3% of sodium bicarbonate. The interface agent has the advantages of excellent construction performance, interface tensile adhesive strength and aging resistance, and long storage life; when the interface agent is applied to interface areas, such as building heat-preservation composite outer templates and heat-preservation decorative sheets, the defects that the adhesion strength of the traditional interface agent with a heat-preservation material and mortar is low, the heat-preservation material is easy to hollow and crack and the like can be overcome.

Description

technical field [0001] The invention relates to an interface agent, in particular to an interface agent for a thermal insulation composite mold-free external formwork system and a preparation method and application thereof, belonging to the technical field of building materials. Background technique [0002] In recent years, as my country has paid more and more attention to the field of building energy conservation, related technologies in the field of building energy conservation have developed rapidly. At present, buildings usually adopt frame structure, frame-shear wall structure, and cast-in-place concrete occupies a large proportion in building construction, and the support formwork of cast-in-place concrete technology usually adopts steel formwork, wood formwork or bamboo glue board, etc. The construction process In addition to the complex process of formwork support and formwork removal, there are also problems such as easy deformation of pouring, large amount of form...

AI Technical Summary

Problems solved by technology

At present, buildings usually adopt frame structure, frame-shear wall structure, and cast-in-place concrete occupies a large proportion in building construction, and the support formwork of cast-in-place concrete technology usually adopts steel formwork, wood formwork or bamboo glue board, etc. The construction process In addition to the complex process of formwork support and formwork removal, there are also problems such as easy deformation of pouring, large amount of formwork, and high engineering construction.

At the same time, according to the relevant regulations on building energy conservation, the external wall of the building adopts the method of pasting the thermal insulation board with the traditional interface agent for thermal insulation or adopts some polystyrene boards or steel wire grid polystyrene boards placed inside the outer formwork for cast-in-place concrete. However, in the actual application process of these methods, there are quality problems such as complex construction and easy cracking, water seepage, and falling off of the insulation layer, and it is difficult to achieve the purpose of the same service life of the insulation and the building structure.

In addition, traditional interface agent materials generally have some shortcomings, such as poor water resistance, especially not resistant to boiling water; easy to absorb moisture, easy to open glue in a humid environment, poor durability; poor heat resistance, the cured adhesive layer has thermoplasticity; low softening point (40-80°C), as the temperature rises, its strength decreases sharply, and it is also prone to creep. Therefore, traditional interface agents cannot be used in places with high temperatures, and their freeze-thaw resistance is poor, and they are easy to freeze below -5°C. , resulting in demulsification

The traditional curing agent is used in the building demoulding-free insulation board, which has poor durability. The bonding performance between the interface agent and the traditional insulation materials (XPS, EPS, PU, ​​phenolic, etc.) is poor, and it is prone to cracking, falling off, hollowing, etc. Therefore, In the field of building energy conservation, there is an urgent need for a thermal insulation composite mold-free external formwork system and corresponding interface agent

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