Three-source integrated microcapsule intumescent flame retardant and preparation method thereof

Abstract

The invention discloses a three-source integrated microcapsule intumescent flame retardant and a preparation method thereof. The flame retardant integrates an acid source, a carbon source and a gas source; and the preparation method comprises the following steps of: reacting polyethylene glycol, melamine, aqueous solution of formaldehyde, a promoter with distilled water to prepare polyethylene glycol modified melamine-formaldehyde prepolymer; suspending ammonium polyphosphate powder particles in a dispersing agent; and adding the prepolymer and a hardener to finally obtain the three-source integrated microcapsule intumescent flame retardant powder particles. The flame retardant has good compatibility, flame retardancy and waterproofness.

Description

technical field [0001] The invention relates to the field of materials, in particular to a three-source integrated microencapsulated intumescent flame retardant and a preparation method thereof. Background technique [0002] Among the existing flame retardants, the traditional halogenated flame retardants have the advantages of high flame retardant efficiency and little impact on the basic properties of materials, but they will produce a lot of smoke and dust, corrosive gases and some toxic gases during thermal decomposition and combustion. substances, seriously endangering human health and polluting the environment. Therefore, halogenated flame retardants are gradually being replaced by halogen-free green flame retardants. Intumescent Flame Retardant (IFR for short) is a kind of flame retardant with carbon, nitrogen and phosphorus as the core components. It is one of the more active flame retardants in recent years. IFR is mainly composed of three parts: acid source, car...

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Problems solved by technology

However, when the flame retardants prepared by these methods are used alone, the flame retardant effect is limited, and the composite material must be compounded with the carbon source to pass a certain flame retardant level, and the introduction of the polyol carbon source will reduce the performance of the flame retardant system. water resistance; moreover, the currently used capsule materials are all thermosetting resins, which are easily squeezed and partially broken during processing, which affects the coating effect; in addition, during high-temperature processing, the acid source is easy to release acid and cause carbonization of the carbon source. The surface of the composite material will turn black, so that the intumescent flame retardant system can only be used as a flame retardant for dark and black products, and cannot be used for light, white or colored products.