Halogen-free flame-retardant resin composition and preparation method of prepreg and laminated plate

Abstract

The invention discloses a halogen-free flame-retardant resin composition which comprises the following components in parts by weight: 20-70 parts of solventless resin, 20-70 parts of solvent, 0-50 parts of curing agent, 8-35 parts of inorganic flame retardant, 0.01-1 part of promoter and 3-30 parts of phosphazene flame retardant; the respective components are mixed and stirred at 20-60 DEG C to prepare a colloidal liquid, and the halogen-free flame-retardant resin colloidal liquid is coated on glass cloth through a vertical or horizontal gluing machine, and is pre-dried through a drying path of the gluing machine to prepare a glass cloth prepreg; and the glass cloth prepeg is further cut and put in a hot press for hot forming to prepare a halogen-free flame-retardant glass cloth laminatedplate or mould pressing composite material. When the halogen-free flame-retardant resin composition is adopted, the prepared halogen-free flame-retardant glass cloth laminated plate can meet the requirements for large-sized electrical machinery and electric appliances, electronic devices and environmental friendliness, and is suitable for F-level and H-level electrical insulating materials of many electrical products such as laminated sheet materials of electronic products, motors, transformers, and the like.

Description

technical field [0001] The invention belongs to a polymer compound composition and its application, and relates to a halogen-free flame-retardant resin composition and a method for preparing prepregs and laminated boards. The prepared halogen-free flame-retardant glass cloth laminate is suitable for use as F-class and H-class electrical insulation materials of many electrical products such as laminated boards of electronic products, motors and transformers. Background technique [0002] On February 13, 2003, the European Commission published the "Waste Electrical and Electronic Equipment Directive" (referred to as the "WEEE Directive") and the "Restriction of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment" (referred to as "RoHS") in its "Official Gazette". "Directive"), requiring that from July 1, 2006, the use of lead, mercury, cadmium, hexavalent chromium, polybrominated diphenyl ethers (PBDE) and polybrominated biphenyls (PBB), etc. harmfu...

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Problems solved by technology

[0004] Although the laminates of benzoxazine resin system and phenolic resin system have certain flame retardant performance, due to the limitation of the nitrogen content in the molecular structure and the flame retardant ability of nitrogen system, although the prepared board can maintain high strength, However, the flame retardancy can only reach UL94V-2 level, UL94V-1 level (the flame retardancy level in the 94th version of the vertical combustion test standard of the US Underwriters Laboratories Laboratory, referred to as V-2 level, V-1 level for short), and cannot meet V -0 level requirements, so improving the flame retardancy of the resin has become an urgent problem for laminates to solve

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