Flame-retardant PBT/PET (polybutylece terephthalate/polyethylene terephthalate) alloy, preparation method and application thereof

Abstract

The invention belongs to the technical field of polymer modification, and provides a flame-retardant PBT / PET (polybutylece terephthalate / polyethylene terephthalate) alloy, a preparation method and application thereof. The flame-retardant PBT / PET alloy is prepared from the following components in parts by weight: 30 to 50% of PBT resin, 5 to 15% of PET resin, 15 to 20% of brominated flame retardant, 0.5 to 2% of antimony compound, 4 to 10% of kaolin, and 20 to 40% of reinforcing material, wherein the synergistic agent is a compound synergistic agent; the compound synergistic agent consists of the antinomy compound and the kaolin; the sum of the percentages of the components by weight is 100%. Compared with the traditional art, the preparation method of the flame-retardant PBT / PET alloy hasthe advantages that the V-0 flame-retardant grade of UL-94 and the IEC 60335 safety standard can be simultaneously reached, the loss of mechanical property is very small, the adding amount of the antinomy compound is very low, and the material cost is lower.

Description

technical field [0001] The invention belongs to the technical field of polymer modification, and relates to a flame-retardant PBT / PET alloy, a preparation method and an application thereof. Background technique [0002] PBT is polybutylene terephthalate, which is one of the five general-purpose engineering plastics. The plastic has excellent mechanical properties, which are reflected in high mechanical strength, high fatigue resistance, high dimensional stability, and small creep. The above properties also rarely change under high temperature conditions. After enhanced modification, it can be widely used in the fields of automobile manufacturing, electronics, instrumentation, lighting appliances, home appliances, textiles, machinery and communications. A branch of enhanced modification is to add glass fiber and flame retardant additives to PBT by means of melt blending to obtain enhanced flame retardant PBT materials, which are used in various electronic and electrical conn...

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Problems solved by technology

[0019] By carefully reading the above patent documents 7-11, it is not difficult to find that the provider of the technical solution added more antimony trioxide in order to obtain a better synergistic effect. It is difficult to find that there are serious drawbacks in the design concept of this scheme: research and development are carried out entirely based on the simple positive relationship between the amount of antimony added and the synergistic effect of flame retardancy within a certain range; the price of antimony trioxide increases year by year, which is not conducive to the control cost of the final product such that it gradually loses some or all of its commercial value

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