Preparation method of polyether-type polyurethane sponge with flame-retardant function

Abstract

The invention belongs to the technical field of polyurethane sponge. The invention discloses a preparation method of polyether-type polyurethane sponge with a flame-retardant function. The preparation method comprises the steps of preparing materials, mixing the materials, stirring, feeding, foaming, carrying out the after-treatment and the like, and in the material preparation process, raw materials such as first polyether polyalcohol, second polyether polyalcohol, third polyether polyalcohol, butyl rubber, a first catalyst, a second catalyst, silicone oil, water, a foaming agent, MDI isocyanate, flame-retardant additive, chain extender and the like. The preparation method of the slow-resilience polyether-type polyurethane sponge is simple in process, high in production efficiency, capable of being produced by utilizing the existing equipment, and capable of being rapidly put into production; and the slow-resilience polyether-type polyurethane sponge prepared by virtue of the preparation method in the invention has good slow resilience and excellent flame retardant property.

Description

technical field [0001] The invention relates to the technical field of polyurethane sponge preparation, in particular to a preparation method of polyether polyurethane sponge with flame-retardant function. Background technique [0002] Sponge generally refers to all foaming materials, and foamed products of resin, rubber, and plastic are called sponges. Polyurethane sponge is foamed polyurethane material. Polyurethane not only has the elasticity of rubber, but also has the strength of plastic and excellent processing performance, and can be used to prepare polyurethane slow rebound foam (soft polyurethane foam). [0003] Flexible polyurethane foam can be divided into polyester type soft foam and polyether type soft foam according to the polyol raw material used. Polyether polyurethane is an open cell structure with the characteristics of temperature-sensitive decompression, and can also be called a temperature-sensitive decompression material. [0004] As a polymer organi...

AI Technical Summary

Problems solved by technology

[0004] As a polymer organic foam material, the flammability of polyether polyurethane sponge has become an important problem that threatens its safety. Therefore, some flame retardant modifications have been made to polyether polyurethane sponge in the existing market; such as China Patent publication number CN102643405A, the patent publication date is August 22, 2012, and the patent named as a manufacturing method of slow rebound polyether polyurethane sponge discloses a kind of anti-flammable polyether polyurethane sponge. Flame modification, adding sulfonate flame retardant to the formula of polyether polyurethane sponge for flame retardant modification and designing the corresponding preparation method, although its flame retardant effect has been improved to a certain extent, but due to its addition The flame retardant effect is single, and its flame retardant effect is still difficult to meet the public's requirements for the flame retardant effect of polyether polyurethane sponge; at the same time, the single flame retardant added is potassium perfluorobutane sulfonate, which is harmful to a certain extent, although Potassium perfluorobutane sulfonate has low toxicity compared with previous flame retardants, but it still has certain hazards, especially for slow-resilience polyether polyurethane sponge, which is usually used as a pillow raw material. Sponge material, its harm to the human body can not be ignored