Environment-friendly flame-retarded unsaturated polyester resin and preparation method thereof

Abstract

The invention relates to a novel environment-friendly flame-retarded unsaturated polyester resin and a preparation method thereof. The resin can be used in vehicles, constructions, electrical appliances and other glass fiber reinforced plastic parts requiring flame retardancy. In the environment-friendly flame-retarded unsaturated polyester resin, bibasic alcohol and dibasic acid or estolide are condensed into unsaturated polyester; the unsaturated polyester resin contains solid reactive phosphorus flame retardant and liquid phosphonium flame retardant, and the content of phosphorus element in the resin is not less than 4 percent of gross mass, wherein the reactive phosphorus flame retardant can be one or two of hydroxyphenylphosphinyl-propanoic acid and hydroxyphenylphosphinyl-ethanoic acid; and the liquid phosphonium flame retardant can be one or more of triethyl phosphate, triphenyl phosphate and dimethyl methyl phosphonate. Each substance in the resin can be directly melted and polymerized without a catalyst; the product does not require separating solvent, does not have the problem of environmental pollution, and reduces the production cost; and the flame retardant can be easily obtained without adding new equipment.

Description

technical field

[0001] The invention relates to a novel environment-friendly flame-retardant unsaturated polyester resin and a preparation method thereof. The resin can replace the traditional halogen-based flame-retardant unsaturated resin and be used in glass fiber reinforced plastic parts requiring flame retardancy such as vehicles, buildings, and electrical appliances. Background technique

[0002] Unsaturated resin is the polycondensation product of saturated dibasic acid or acid anhydride and polyol, usually styrene is used as crosslinking agent (diluent), and it can be made into various profiles after being cured under heating or normal temperature conditions, and is widely used in construction and electrical appliances , transportation, aerospace and other fields. Due to the high hydrocarbon content of general-purpose unsaturated polyester resin, it is easy to burn, and produces a lot of harmful smoke when burning, so it is required to use flame-retardant unsaturated...