Flame-retardant polyurethane rigid foam taking melamine as basic characteristic and preparation method of flame-retardant polyurethane rigid foam

Abstract

The invention discloses a flame-retardant polyurethane rigid foam taking melamine as a basic characteristic and a preparation method of the flame-retardant polyurethane rigid foam. The flame-retardant polyurethane rigid foam taking melamine as the basic characteristic comprises a component A and a component B, wherein the weight ratio of the component A to the component B is 1: (1.1-1.5); the component A comprises the following components in parts by weight: 20-40 parts of flame-retardant polyether polyol taking melamine as the basic characteristic, 1-5 parts of catalyst, 0.5-1.0 part of foam stabilizer, 1-3 parts of physical foaming agent and 1-3 parts of water; and the component B is isocyanate. The preparation method comprises the following steps: mixing all the raw materials of the component A, then adding the component B, pouring an obtained mixture into a mold, curing for 30-60s, and then continuously curing for 48h at room temperature to obtain the flame-retardant polyurethane rigid foam taking melamine as the basic characteristic, wherein the flame-retardant polyurethane rigid foam has the density of 39.1-42.8kg / m<3>, the compressive strength of 0.15-0.20Mpa and the limit oxygen index of 22.3-24.5%.

Description

technical field [0001] The invention relates to a flame-retardant polyurethane rigid foam with melamine as the basic feature and a preparation method thereof, belonging to the technical field of polyurethane flame-retardant materials. Background technique [0002] Polyurethane rigid foam has many advantages such as low thermal conductivity, good thermal insulation performance, weather resistance, etc., and because of its various product forms and convenient processing, it is widely used as building exterior wall insulation materials, home appliance insulation materials and other fields. However, the oxygen index of polyurethane rigid foam without flame retardant treatment is around 18, which is a flammable material. With the continuous advancement of national energy conservation and environmental protection policies and the implementation of building energy conservation regulations, people not only require polyurethane rigid foam to have good thermal insulation performance, ...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of easy migration, non-permanent flame retardant effect and high production cost of structural flame retardant foam in additive flame retardant foam, thereby providing a low-cost, flame retardant flame retardant based on melamine. Polyurethane rigid foam and a preparation method thereof, the flame-retardant polyurethane rigid foam based on melamine has intrinsic flame-retardant properties, the preparation method is simple and easy to operate, and has the advantages of low cost and the like

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