Flame-retardant resin composition

Abstract

A flame-retardant resin composition which comprises a base resin and a flame retardant comprising (A) a calcium hydrogen phosphate and (B) at least one ingredient selected among (B1) a phosphorus compound, (B2) a nitrogen compound, (B3) a boron compound (such as a metal borate), (B4) a silicon compound (such as a (poly)organosiloxane or zeolite), and (B5) a metal compound (such as a metal hydroxide or metal oxide). The calcium hydrogen phosphate (A) may be, for example, a substantially anhydrous one. The phosphorus compound (B1) may be a (poly)phosphoric acid salt, a condensate of an organophosphorus compound, red phosphorus, etc. The nitrogen compound (B2) may be a salt of an aminated cyclic nitrogen compound with an oxyacid, a salt of an aminated cyclic nitrogen compound with a hydroxylated nitrogen compound, a urea compound, etc. The resin composition can have flame retardancy without the need of containing a halogenated flame retardant.

Description

technical field [0001] The present invention relates to a flame retardant resin composition containing a base resin (peace resin) and a flame retardant, a preparation method thereof, and a molded body formed from the flame retardant resin composition, and the flame retardant is composed of calcium hydrogen phosphate (calcium hydrogen phosphate ( A) and at least one component (B) selected from phosphorus-containing compounds (B1), nitrogen-containing compounds (B2), boron-containing compounds (B3), silicon-containing compounds (B4) and metal compounds (B5). Background technique [0002] Among thermoplastic resins, polyester-based resins such as polybutylene terephthalate and styrene-based resins are preferred due to their excellent mechanical properties, electrical properties, weather resistance, water resistance, chemical resistance and solvent resistance. Used in various applications such as electrical and electronic parts, mechanical mechanism parts, and automobile parts. ...

AI Technical Summary

Problems solved by technology

[0005] However, as a non-halogen-based flame retardant, although it does not contain harmful halogens, its flame retardancy is inferior to that of halogen-based flame retardants, so a large amount of flame retardants must be used

The addition of a large amount of flame retardants will cause surface blooming and reduce the mechanical properties of the resin

Therefore, the flame retardancy and mechanical properties cannot be improved at the same time

For example, when expanded graphite is used at the same time, its appearance during molding is significantly reduced

Especially when phosphate ester is used as the phosphorus-containing compound, it will cause blooming on the surface and decrease in heat resistance

[0006] It can be seen that it is difficult to impart flame retardancy without reducing the properties of the resin by conventional methods.

In addition, among the above-mentioned flame retardants, although specific resins can be flame-retardant, they cannot impart high flame retardancy to a wide range of thermoplastic resins.