B1 grade flame-retardant rigid polyurethane foam thermal insulation board and preparation method and application thereof

Abstract

The invention discloses a B1 grade flame-retardant rigid polyurethane foam thermal insulation board and a preparation method and application thereof, the B1 grade flame-retardant rigid polyurethane foam thermal insulation board comprises a component A and a component B in a mass ratio of 1: (0.8-1.5); the component A comprises the following components by weight: 40 to 80 parts of polyether polyol,20 to 60 parts of polyester polyol, 0.1 to 3 parts of a foaming catalyst, 0.1 to 5 parts of a gel catalyst, 0.5-3 parts of a trimerization catalyst, 1-3 parts of silicone oil, 5-50 parts of a modified graphite flame retardant, 5-25 parts of a synergistic flame retardant, 5-20 parts of a foaming agent and 2-10 parts of a stabilizer; the component B is an isocyanate and / or a polymeric isocyanate. The modified graphite flame retardant is added on the one hand, and the synergistic flame retardant is added on the other hand, the modified graphite flame retardant and the synergistic flame retardantcan react with the isocyanate to enhance the mechanical properties of polyurethane rigid foam; the production process is simple and convenient, the formula is reasonable, the required conditions andequipment are simple, and the process is simple and controllable, and can meet the needs of industrialization.

Description

technical field [0001] The invention belongs to the technical field of preparation of thermal insulation materials, and relates to a rigid polyurethane foam thermal insulation board, in particular to a B1 grade flame-retardant rigid polyurethane foam thermal insulation board and its preparation method and application. Background technique [0002] Polyurethane rigid foam is a high molecular thermosetting polymer with a thermal conductivity of 0.015-0.024W / (m k), which is only 70% of foamed styrene and 50% of rock wool; at the same time, polyurethane rigid foam chemical Good stability, acid resistance, alkali resistance, heat resistance, good freeze-thaw resistance and low temperature flexibility, low water absorption, can well block the penetration of water and water vapor, and maintain a good and stable wall inside the wall The thermal insulation condition is a kind of thermal insulation board with excellent performance and the best cost performance that is widely used in t...

AI Technical Summary

Problems solved by technology

However, this invention uses DMMP organic flame retardants, which do not participate in the molding reaction of rigid polyurethane foam, and only exist in the body phase of polyurethane as an additive, which will lead to the flame retardant of rigid polyurethane foam after volatilization over time. The problem of performance failure; and its price is relatively high, it is strictly controlled and pollutes the environment seriously

[0007] The Chinese invention patent with the publication number CN107459616A discloses a preparation method of highly flame-retardant polyurethane foam. The patent uses expanded graphite as a flame retardant, and specifically discloses that the preparation method includes polyester polyol, polyether polyol, Structural flame retardant polyether polyol, liquid flame retardant, catalyst, foam stabilizer and water are mixed evenly, then graphite is added, after mixing evenly, foaming agent is added to form a white material, then polyisocyanate is added, and after stirring, it is heated at a constant temperature. It can be obtained by soaking and ripening; although this method can obtain polyurethane foam with good flame retardant properties, its disadvantages include: (1) liquid flame retardants are used, and this type of flame retardants has the advantages of low price and convenient use. However, a large amount of dense smoke will be generated during its combustion process, and toxic and corrosive gases released will easily lead to suffocation or even death if inhaled by the human body, and the performance of these flame retardants is unstable and easy to hydrolyze and deteriorate; (2) the flame retardant used The particle size (less than 80 mesh) and expansion coefficient (210ml / g-300ml / g) of the expanded graphite of the combustion agent are small, and the larger the particle size and expansion coefficient of graphite, the better the flame retardant effect

[0008] So far, it has not been seen that the dispersion and compatibility of expandable graphite in the polyurethane body phase can be solved, and the combination of expandable graphite and other flame retardants can achieve excellent flame retardant effect, oxygen index greater than 26 and Report on Class B1 Flame Retardant Rigid Polyurethane Foam Insulation Board with Good Mechanical Properties

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