Modified building material and preparation method thereof

Abstract

The invention provides a modified building material. The formula comprises the following components: 50 to 80 parts by weight of a material A, 100 to 300 parts by weight of a material B and 20 to 50 parts by weight of an auxiliary material, wherein the material A is surface-modified polyester polyol, the material B is modified polyisocyanate, the auxiliary material comprises a catalyst, a foamingagent and a toughening agent, the preparation method of the modified polyisocyanate comprises the following steps: adding 2-5 parts by weight of epoxy resin into 100 parts by weight of polyisocyanate(crude MDI), heating to 100-126 DEG C, stirring for 15-40 minutes, continuously adding 1-3 parts by weight of soft foam glyceryl polyether, keeping the temperature, stirring for 1-3 minutes, adding 2-5 parts by weight of carbodiimide, stirring for 2-5 minutes, cooling, and standing to obtain 103-110 parts by weight of the modified isocyanate. The soft foam glyceryl polyether is added in the preparation of the modified polyisocyanate, the crosslinking degree is greatly improved when the soft foam glyceryl polyether reacts with polyhydric alcohols, and the soft foam glyceryl polyether is used for increasing the saturation, toughness and elasticity of the product and preventing the product from being damaged and cracked easily.

Description

technical field [0001] The invention belongs to the technical field of modification and preparation of building materials, and relates to a modified building material and a preparation method thereof. Background technique [0002] At present, the development of ecological architecture in various places is in its infancy, and Western Europe and Northern Europe are relatively well-developed regions. In recent years, architects from various countries are concentrating on researching the material technology and building structure manufacturing methods of ecological architecture. my country has also issued a series of national long-term development plans and implementation policies for green building materials. It is strictly forbidden to use traditional cement mortar and other materials in ecological nature reserves for project development and construction. Scientifically reduce deforestation and damage to natural landscapes, rocks and water bodies, make nature a part of architec...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the performance of logs and imitation wood materials in the prior art is not ideal in terms of anti-aging, thermal insulation, sound insulation, fire prevention, insect resistance and corrosion resistance, and now provides a modified building material formula and its preparation method

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