Desulphurization gypsum-polyurethane compounded fireproof and heat-preservation board and preparing method thereof

Abstract

The invention discloses a desulphurization gypsum-polyurethane compounded fireproof and heat-preservation board. The desulphurization gypsum-polyurethane compounded fireproof and heat-preservation board comprises ingredients A and ingredients B. The ingredients A comprise polyether polyol, polyester polyol, polypropylene glycol, structural flame resistant polyol, modified desulphurization gypsum powder, a foam stabilizer, a gel-type catalyst, a trimerization catalyst, a liquid fire retardant and a foaming agent; the ingredients B comprise polyaryl polymethylene isocyanate. A preparing method includes the steps that the ingredients A are stirred to be even, the foaming agent is added, then the ingredients B are added, the mixture is stirred at the high speed to be poured into a constant temperature mold, foamed, cured and demolded, and the desulphurization gypsum-polyurethane compounded fireproof and heat-preservation board is prepared. According to the desulphurization gypsum-polyurethane compounded fireproof and heat-preservation board and the preparing method, a by-product desulphurization gypsum of the coal electricity plant industry is fully used, desulphurization gypsum powder is successfully and organically modified, and the compatibility between the desulphurization gypsum powder and a raw polyurethane material is enhanced; the product has high fireproof performance and good mechanical performance at the same time, and combustion performance can meet the A-grade requirement of the national standard.

Description

technical field [0001] The invention relates to thermal insulation building materials, in particular to a desulfurized gypsum polyurethane composite board capable of achieving fire prevention and thermal insulation effects. Background technique [0002] With the advancement of science and technology and the improvement of the national economy, building energy conservation has increasingly become a hot spot and focus of national and social attention, and thermal insulation and fire prevention are the key direction of building energy conservation. In terms of thermal insulation effect, polyurethane rigid foam stands out among many polymer materials. It has the advantages of low thermal conductivity, good compressive strength and dimensional stability, relatively light weight, waterproof, and aging resistance. However, pure polyurethane rigid foam is extremely flammable, and it will immediately generate flames when it comes into contact with a fire source, and its flame retarda...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low fireproof performance, high production cost and poor heat preservation effect in the existing heat preservation materials, the main purpose of the present invention is to provide a desulfurized gypsum-polyurethane composite fireproof heat preservation board and its preparation method, while maintaining the original heat preservation effect, Improved fire performance, enhanced mechanical strength, and reduced production costs

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