Polycarbonate flame retardant endurance plate and preparation method thereof

Abstract

The invention relates to a polycarbonate flame retardant endurance plate. The flame retardant endurance plate is composed of the following components, by weight, 95%-99.5% of polycarbonate and 0.5%-5% of a flame retardant, wherein the flame retardant is modified potassium perfluorobutanesulfonate. A preparation method of the flame retardant endurance plate comprises the steps of (1) mixing carbonate particles and flame retardant particles uniformly, melting and plasticizing the mixture in an extruder; (2) shaping the plasticized material in a mold and cooling by a three-roller method; and (3) drawing, coating and cutting the cooled model. The polycarbonate flame retardant endurance plate provided by the invention has the advantages of thin thickness, high strength, strong toughness, high transparency, non-toxicity and harmlessness, etc. The polycarbonate flame retardant endurance plate can not release toxic and harmful gas to the environment, and fits ROHS environment-protecting directives.

Description

technical field [0001] The invention relates to a flame-retardant material, more specifically, to a polycarbonate flame-retardant endurance board and a preparation method thereof. Background technique [0002] Polycarbonate (PC) is one of the five general-purpose engineering plastics, and the global output has exceeded 1000kt. The glass transition temperature of PC (T g =140~150℃) and heat distortion temperature (HDT(1.82MPa)=130~140℃) are both high, and rich in charcoal properties, and its own flame retardancy can reach V-2 level according to the UL-94 standard. With the expansion of the application field of polycarbonate sheets, polycarbonate sheets are gradually used in interior decoration, equipment protection, and electrical and electronic applications. According to the relevant national fire protection regulations, more requirements have been put forward for the flame retardancy of polycarbonate sheets. High requirements, it needs to reach the flame retardant V-0 lev...

AI Technical Summary

Problems solved by technology

With the expansion of the application field of polycarbonate sheets, polycarbonate sheets are gradually used in interior decoration, equipment protection, and electrical and electronic applications. According to the relevant national fire protection regulations, more requirements have been put forward for the flame retardancy of polycarbonate sheets. High requirements, it needs to reach the flame retardant V-0 level, the flame retardants commonly used in traditional flame retardant PCs include halogenated flame retardants and phosphorus flame retardants, these flame retardants themselves have many disadvantages, for example, halogenated flame retardants Flame-retardant polymers generate more smoke, toxic and corrosive gases when burned, which reduces the light resistance of the flame-retardant substrate and is easy to seep out, which will pollute the environment

Phosphorus-based flame retardants are added in large amounts, high in cost, and low in decomposition temperature. Some will also affect the impact strength of the resin. Higher temperatures will cause polycarbonate materials to yellow

These defects of halogenated flame retardants and phosphorus flame retardants have restricted their use and gradually eliminated them.

[0003] In the early 1970s, General Electric Company of the United States had a patent report on the high flame retardancy of perfluoroalkane sulfonates to PC. For some alkali metal earth metal salts of aromatic sulfonates, the dosage of less than 1% was equivalent to It can make PC self-extinguishing, but it will reduce the transparency of PC to a certain extent, and the conventional polycarbonate sheet is added with sulfonate flame retardant, and generally it can only reach the V-0 level when the thickness exceeds 3.2mm.

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