COFs-modified ammonium polyphosphate flame retardant as well as preparation method and application thereof and flame-retardant epoxy resin

An ammonium polyphosphate and epoxy resin technology, applied in the field of flame retardants, can solve the problems of complex APP modification synthesis process, poor compatibility of epoxy resin, strong water absorption of APP, etc., and achieves broad industrial application prospects, high hydrophobicity Sexual, easy-to-use effects
CN114031817AActive Publication Date: 2022-02-11HEBEI UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI UNIVERSITY
Publication Date
2022-02-11

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Abstract

The invention provides a COFs-modified ammonium polyphosphate flame retardant, a preparation method and application thereof and flame-retardant epoxy resin. The flame retardant is of a core-shell structure with ammonium polyphosphate as a core and a COFs material as a shell, the water contact angle of the flame retardant is larger than 95 degrees, the specific surface area is larger than 5 m<2> / g, and the average pore size is smaller than 6.07 nm. Ammonium polyphosphate, p-phenylenediamine, 1,3,5-tri(4-aminophenyl)benzene and 1,3,5-tri(4-aminophenyl)benzene are used as raw materials, and a one-step method is adopted for synthesis. The flame-retardant epoxy resin is prepared by adding a COFs-modified ammonium polyphosphate flame retardant into epoxy resin. The preparation method is simple to operate and mild in condition, the obtained flame retardant has relatively high hydrophobicity and flame retardance, and a feasible treatment method is provided for the flame retardant with poor stability. The prepared flame retardant is added into the epoxy resin, so that the flame retardant effect of the obtained epoxy resin can be greatly improved, and the flame retardant has a wide industrial application prospect.
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Description

technical field

[0001] The invention relates to a flame retardant, in particular to a COFs modified ammonium polyphosphate flame retardant, its preparation method, application and flame retardant epoxy resin. Background technique

[0002] Epoxy resin (EP) is an important thermosetting polymer with excellent physical and chemical properties, widely used in composite material matrix, coating and other fields. However, EP has high flammability, and current researchers mainly improve the flammability of epoxy resin by adding flame retardants. Currently commonly used EP flame retardants are mainly phosphorus-based flame retardants, among which ammonium polyphosphate (APP) is a compound with both phosphorus and nitrogen, which can be used as an acid source and a gas source at the same time. Therefore, it has broad application prospects in flame retardant EP. However, the strong water absorption of APP leads to its easy precipitation from the matrix in a humid environment. In ad...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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