A spray-coated flame-retardant polyurethane composite material and its preparation method and use method

Abstract

The invention discloses a spray-coating flame-retardant polyurethane composite material, which comprises the following components in parts by weight: 50-80 parts of polyester polyol, 5-15 parts of flame-retardant polyether polyol, 20-50 parts of isocyanate, 5-10 parts of joint agent, 0.1-1 part of catalyst, 5-12 parts of chain extender, 3-10 parts of foaming agent and 0.5-1 part of foam stabilizer; the flame-retardant polyether polyol includes flame-retardant polyether Polyol POP3628H and flame-retardant polyether polyol YB-3028, in terms of mass ratio, the mass ratio of the flame-retardant polyether polyol POP3628H to flame-retardant polyether polyol YB-3028 is 1:1 to 3:1 . The flame-retardant polyether polyol is introduced into the polyurethane composite material of the present invention, and the flame-retardant elements are stably combined into the polyurethane matrix, and by optimizing and screening the types and proportions of the flame-retardant polyether polyol, the performance of the polyurethane is significantly improved. Flame retardant performance, and reduce the preparation cost of the flame retardant polyurethane foam material, good flame retardant stability, can maintain the flame retardant effect for a long time, and has no adverse effect on the physical properties of polyurethane.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a spray-coating flame-retardant polyurethane composite material and a preparation method and application method thereof. Background technique [0002] The main purpose of polyurethane is to make various kinds of soft, hard and semi-hard foam plastics. It has many excellent properties such as shock absorption, heat insulation, sound absorption, wear resistance and high elasticity. It has been widely used in petroleum, chemical pipelines, refrigeration, Thermal insulation of buildings, as well as various vehicles, furniture cushions, backrest materials and decoration, decoration materials, etc. However, the oxygen index of ordinary polyurethane foam is only 16.5, which is close to the candle oxygen index of 15.01, which belongs to the category of flammable materials. When polyurethane foam is burned, it will release a large amount of reaction heat, flammable gas a...

AI Technical Summary

Problems solved by technology

However, due to the disadvantages of the added flame retardants such as easy migration, inability to maintain the flame retardant effect for a long time, and damage to the physical properties of the foam (such as tensile strength, tear strength, etc.)

Therefore, it is difficult for additive flame retardants to meet the requirements for fields with high flame retardancy requirements.

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