Fireproof flame-retardant polymer light building external wall thermal insulation composite board and preparation process thereof

Abstract

The invention discloses a fireproof flame-retardant polymer light building external wall insulation composite board, and particularly relates to the technical field of building external wall insulation boards. Raw materials used in the method comprise, by weight, 10-15 parts of an inorganic material, 20-40 parts of ordinary Portland cement, 1-10 parts of a heat absorbent, 2-10 parts of a waste material, 10-20 parts of silicon-based nanometer powder, 20-30 parts of graphene foaming granules, 1-5 parts of an interface treating agent, 1-5 parts of an additive and 20-40 parts of water. An organic and inorganic composite modification method is adopted, the advantages of inorganic fire prevention and organic heat preservation are integrated, and on the premise that the fireproof performance, heat preservation performance and processing performance of the board are met, the board has the advantages of being low in density, low in water absorption rate, low in heat conductivity coefficient, high in tensile strength and capable of achieving A-level fire prevention and non-combustible; and meanwhile, the plate is a green A-grade fireproof thermal insulation plate with high production efficiency and low price, and meets the requirements of high performance and environmental protection in the building industry.

Description

technical field [0001] The invention relates to the field of thermal insulation panels for building exterior walls, in particular to a fireproof and flame-retardant polymer lightweight building exterior wall thermal insulation composite panel and a preparation process thereof. Background technique [0002] At present, my country's building stock is 50-60 billion square meters, a considerable part of which is high-energy-consuming buildings, and 2 billion square meters of new buildings are built every year, and the proportion of building energy consumption to total energy consumption reaches more than 30%. The heat loss of buildings is mainly composed of exterior walls, windows, ventilation, roofs, floors, and stairwells, among which the heat loss of exterior walls accounts for the largest proportion, reaching 26%. very important. [0003] Building exterior wall insulation refers to the use of various materials and technologies to process the building's exterior walls to str...

AI Technical Summary

Problems solved by technology

The disadvantages of rock wool boards are concentrated in the low tensile strength of the actual board perpendicular to the board surface. The rock wool fiber has a certain acidity and is prone to acid-base reaction with cement, which is prone to problems such as hollowing and falling off of the board.

At the same time, rock wool fiber causes cancer and endangers health

(2) Class A fire-proof and heat-insulation materials such as foamed cement board, foam ceramics, foam glass, and vacuum insulation board have defects such as incompatibility between heat preservation and fire resistance, high processing costs, strict construction conditions, and unstable performance.

The permeable board is made of foamed polystyrene insulation board as the base material, and a certain amount of inorganic gelling material is infiltrated into the gap of the foamed polystyrene insulation board by means of vacuum negative pressure. The shortcomings of low strength and acidity have achieved a certain degree of balance between flame retardancy, heat preservation and mechanical properties, but there are also disadvantages such as poor plate uniformity, uneven performance, poor weather resistance, and long curing time.

The homogeneous board is formed by uniformly mixing expanded polystyrene particles with inorganic materials and then pressing and curing. While inheriting the advantages of the permeable board, it solves the shortcomings of the permeable board's flame retardancy, heat preservation and anisotropy in mechanical properties. As the main inorganic cementitious material, silicate cement or other Portland cement solves the disadvantage of poor weather resistance, but because it adopts intermittent foaming and pressing process, it needs a lot of foaming and compression mold boxes and storage sites, plus large-scale Cutting process, low production efficiency

[0007] The existing domestic external wall insulation boards have good thermal insulation performance due to the existence of organic boards, but are easy to burn and have poor fire protection ratings; inorganic boards have good fire resistance performance, but low strength, easy hollowing and falling off, and poor safety; And fireproof performance, but the production efficiency is low, the cutting dust is large, the pollution is serious, etc., which leads to many defects in the production and actual use process:

[0008] One: easy to burn, fast flame propagation, great harm: because the board contains a large amount of organic materials, such as polyurethane foam, polystyrene foam, etc., these organic materials are flammable materials, easy to be ignited, and the burning speed is fast. Large amount of heat release, rapid spread, easy to form internal and external connections in a short period of time, a large area of ​​three-dimensional fire, difficult to fight, high toxicity of combustion products, great harm to personal safety

[0009] Two: high water absorption, low tensile strength, easy to crack and fall off: rock wool and other inorganic insulation boards have poor weather resistance, easy to absorb water, low tensile strength, and are prone to cracking and falling off. Poor, short service life

[0010] Three: High energy consumption and heavy pollution, leading to restricted use: Rock wool is made of basalt high-temperature melting and drawing, bonded with adhesives, and its production consumes a lot of energy. Respiratory system diseases; rock wool has high water absorption rate, low tensile strength, and is easy to fall off, causing smashing accidents; inorganic / organic composite boards can also achieve Class A fire protection, but they adopt intermittent production processes, occupying a large area and cutting surfaces Many, large loss and dust, difficult to meet the needs of the construction industry

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