Efficient flame retardant two-component polyurethane adhesive

Abstract

The invention discloses an efficient flame retardant two-component polyurethane adhesive comprising the following components and the weight parts of the corresponding components: 40 parts by weight of polyester polyol; 28 parts by weight of calcium carbonate; 20 parts by weight of a flame retardant; and 2 parts by weight of molecular sieve. Even if the flame retardant is added in the two-component polyurethane adhesive, no obvious influence on the properties of an original two-component polyurethane adhesive exists, and the original cohesive strength, bonding strength, color appearance, viscosity, application time, foaming rate and main solid ratio can be substantially kept.

Description

technical field [0001] The invention relates to the technical field of the adhesive industry, in particular to a high-efficiency flame-retardant two-component polyurethane adhesive. Background technique [0002] In the adhesive industry, there are various requirements for adhesive properties, and flame retardant is one of them. Currently used flame retardants are halogen-based, nitrogen-based, phosphorus-based, and inorganic-based. [0003] In the prior art, the main problems of flame retardants suitable for polyurethane adhesives are: 1. There are many types of flame retardants, each with its own characteristics and effects, and it is difficult to choose a suitable model; 2. Two-component Polyurethane adhesives generally use calcium carbonate as a filler, which has a certain impact on the flame retardant effect of nitrogen-phosphorus flame retardants; 3. Liquid flame retardants have a certain plasticizing effect, and the added double-group 4. The flame retardant effect of...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the main problems of flame retardants suitable for polyurethane adhesives are: 1. There are many types of flame retardants, each with its own characteristics and effects, and it is difficult to choose a suitable model; 2. Two-component Polyurethane adhesives generally use calcium carbonate as a filler, which has a certain impact on the flame retardant effect of nitrogen-phosphorus flame retardants; 3. Liquid flame retardants have a certain plasticizing effect, and the added double-group 4. The flame retardant effect of halogen-based flame retardants is better, but it will release harmful substances during combustion and heating, threatening human health, the environment and the next generation. Children and grandchildren, the environmental protection of this kind of flame retardant has been controversial, and it is not recommended to be used; 5. Inorganic flame retardants are green and environmentally friendly, burning without smoke, but the flame retardant efficiency is low, the addition amount is large, and the compatibility with organic thermoplastic resins is poor, and it is not easy to use. Dispersion, after dispersion, the affinity is not good, which affects the impact resistance of the material and loses flexibility; 6, flame retardants containing water, in which water molecules react with isocyanate to generate carbon dioxide gas, which affects the foaming rate of two-component polyurethane great influence