A special alkali-resistant interface agent for phenolic foam insulation board

Abstract

The invention relates to the technical field of the chemical industry, in particular to a special alkali-resisting interfacial agent for a phenolic foam insulation board. The interfacial agent comprises components in parts by weight as follows: 20-25 parts of water, 40-45 parts of modified acrylic latex, 4-10 parts of a modified water repellent agent, 2-3 parts of a dispersing agent, 2-3 parts of a substrate wetting agent, 3-5 parts of a silane coupling agent, 2-4 parts of an antifoaming agent, 3-6 parts of a coalescing agent, 1-2 parts of an antibacterial agent, 4-8 parts of a flame retardant, 5-10 parts of inorganic powder, 1-2 parts of a multifunctional additive, 2-4 parts of a thickener and 1-2 parts of color paste. A preparation method of the interfacial agent comprises the followings steps: a, preset weight of the water, the dispersing agent, the substrate wetting agent, the antifoaming agent, the coalescing agent, the silane coupling agent, the inorganic powder, the modified acrylic latex, the modified water repellent agent, the thickener, the color paste, the multifunctional additive, the antibacterial agent and the flame retardant are put into a high-speed dispersion machine and stirred. The bonding strength of a phenolic insulation board with mortar is enhanced.

Description

Technical field [0001] The invention relates to the technical field of the chemical industry, in particular to a formula of a special alkali-resistant interface agent for phenolic foam insulation boards and a preparation process thereof. Background technique [0002] External wall insulation is one of the main measures for energy-saving buildings. The waterproof function of building insulation has a great influence on the effect of building insulation and energy saving, and even affects the function and durability of the building. [0003] Among many thermal insulation materials, phenolic foam is known as the "king of thermal insulation materials" and is a new generation of thermal insulation and fireproof materials. As a safe and green new energy-saving building material, the advantages of phenolic foam have been recognized by the construction department and the public security fire department. However, the phenolic foam insulation board has some defects. The bonding strength bet...

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Problems solved by technology

However, there are some defects in the phenolic foam insulation board. The bonding strength between this material and the mortar is poor, and an interface agent must be used to increase the bonding strength, and the phenolic board is exposed to alkaline mortar for a long time, which will reduce the strength of the phenolic board. However, the existing Ordinary interface agents have poor film-forming properties, and there are many voids after film formation, which cannot play an absolute barrier role. Acidic phenolic boards will react chemically with alkaline mortar for a long time, thereby reducing the bonding strength with the mortar, especially when the external wall When cracks appear and rainwater seeps in, the stability of the phenolic system is greatly reduced, and even causes the board to fall off

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