High fire retardation type polyurethane thermal-insulation plate and preparation method thereof

Abstract

The present invention relates to a high fire retardation type polyurethane thermal-insulation plate and a preparation method thereof. The raw materials in the formula of the high fire retardation type polyurethane thermal-insulation plate comprise 1) diphenyl methane diisocyanate and 2) combined polyether polyol, wherein the raw materials in the formula of the combined polyether polyol comprise polyether polyol, fire retardation polyether polyol, dimethyl silicon oil, triethanolamine, a catalyst, a fire retardation agent and a foaming agent. The high fire retardation type polyurethane thermal-insulation plate has the excellent fire retardation performance, wherein the fire retardation grade achieves the B1 grade.

Description

technical field [0001] The invention relates to an external wall thermal insulation technology, in particular to a high flame-retardant polyurethane thermal insulation board and a preparation method thereof. Background technique [0002] Among the existing external wall insulation technologies, rock wool, EPS and XPS boards, and phenolic boards are the main ones, and ordinary polyurethane boards have also entered the application stage in some areas. However, due to its own performance shortcomings, the above materials can no longer meet the needs of economic and social development. [0003] The main component of rock wool board is basalt slag. Its main production is to fully melt the ore components in a high-melting furnace, and then spin through high-speed centrifugal sticks to form rock wool wool. Add a certain proportion of high-efficiency adhesives, (the difference in the production of hydrophobic rock wool boards lies in the difference in the waterproofness of high-eff...

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Problems solved by technology

Rock wool is a kind of mineral wool, and its resources are limited. According to the statistics of the special committee, in 2010, the output of rock wool and its products in my country was 860,000 tons, of which the amount of rock wool used in the construction field was less than 100,000 tons. The overall completed area Less than 300,000 square meters, and the rock wool production line has a long production cycle. Generally, it takes about two years for a domestic rock wool factory to go from construction to operation. Therefore, the amount of rock wool external insulation used is far from meeting the current building energy-saving requirements in my country.

The cost per cubic meter of rock wool board is much higher than that of similar thermal insulation building materials in the market. Considering the huge amount of thermal insulation materials used in building energy-saving renovations in my country, the price of rock wool is also not conducive to the large-scale promotion and use of the market.

Hazards to the human body: Although the fire resistance of rock wool can reach Class A, because of its serious harm to the human body, there are carcinogenic problems. Some developed countries have imposed strict restrictions on the use of rock wool. Long-term inhalation of rock wool dust can cause bronchial Meningitis and emphysema, contact dermatitis and other symptoms

Considering the health of industrial personnel, the use should be strictly restricted

Huge energy consumption: Rock wool production needs to remelt and fiberize raw materials. This process will generate a lot of waste water, waste gas, and consume a lot of energy. It is a high energy consumption and high pollution industry. It is in line with the overall development trend of energy conservation and emission reduction in my country. does not match

Defects of domestic rock wool technology: The performance of domestic "rock wool board" is far behind that of foreign products, mainly in terms of tensile strength and water absorption, and these two indicators are restricting the application of rock wool boards to external wall insulation System key indicators

[0008] The EPS board has the following disadvantages: in different seasons, day and night, due to the change of temperature difference inside and outside the wall, the facing brick will be affected by the temperature stress in the three-dimensional direction, and local stress concentration will occur in the facing layer, such as at the junction of vertical and horizontal walls; The connection between the wall or the roof and the wall; the stress concentration in the middle of the large-area wall, etc., the cracking of the facing layer will cause the facing brick to fall off, and the local extrusion deformation of the adjacent brick will cause the facing brick to fall off

Due to the congenital defects of the chain molecular structure of ordinary polyurethane, no matter how the amount of flame retardant is changed, its flame retardant performance is difficult to reach B1 level. The poor flame retardant performance is the main problem restricting the application of ordinary polyurethane insulation boards.

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