Synergistic flame-retardant polyether polyol for sponge and preparation method thereof

Abstract

The invention belongs to the technical field of synthesis of polyether polyol, and particularly relates to synergistic flame-retardant polyether polyol for sponge and a preparation method thereof. The synergistic flame-retardant polyether polyol for sponge is prepared by taking poly(phosphoric acid) and tris(2-hydroxyethyl) isocyanurate as a composite initiator and a bimetallic cyanide complex as a catalyst and carrying out ring opening polymerization on the composite initiator, epoxy propane and ethylene oxide; wherein the molar ratio of poly(phosphoric acid) to tris(2-hydroxyethyl) isocyanurate is (1: 1)-(1: 9). According to synergistic flame-retardant polyether polyol for sponge, nitrogen and phosphorus are introduced into a molecular structure, so that a synergistic flame-retardant effect is achieved, and the sponge has excellent flame-retardant performance.

Description

technical field [0001] The invention belongs to the technical field of polyether polyol synthesis, and in particular relates to a synergistic flame-retardant polyether polyol for sponge and a preparation method thereof. Background technique [0002] Polyurethane flexible foam is referred to as soft foam, commonly known as sponge. The main raw materials are polyether polyol and toluene diisocyanate, and foam stabilizers, foaming agents, catalysts, fillers, etc. are added through polymerization and foaming. It is mainly used for furniture cushions, Vehicle seat cushion materials and various soft cushion laminated composite materials have a wide range of applications. However, sponge, as an organic polymer foam material with low density and large specific surface area, has a strong flammability, and even continuous line large foam sponges have a certain risk of spontaneous combustion due to the heat release of the polymerization reaction during the production and preparation pr...

AI Technical Summary

Problems solved by technology

However, sponge, as an organic polymer foam material with low density and large specific surface area, has strong flammability, and even continuous line large foam sponge has a certain risk of spontaneous combustion under the influence of polymerization reaction heat release during production and preparation. , which is in great contradiction with the current increasingly stringent fire safety requirements, and the demand for sponge flame retardant is very urgent

[0003] The traditional method to improve the flame retardancy of sponge is to add a halogen-containing polymer or a flame-retardant mixture composed of halogen-containing flame retardants in the formula, but the added flame retardant will reduce the mechanical properties of sponge products; as time goes on, Flame retardants may migrate and precipitate from the product, affecting stability and flame retardancy

Another way to improve flame retardancy is to introduce flame retardant elements and groups into the molecular structure. The problem is that the flame retardant effect is general, and the synthesis process is complicated and difficult to realize.

[0006] Chinese patent CN201911245678.5 discloses a halogen-free flame-retardant sponge and its preparation method, which uses nitrogen foaming technology to replace air foaming technology and improves the fire resistance of flexible polyurethane foam from the formulation technology, without considering polyether The role of polyols in improving flame retardant effect

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