Chemically modified transparent flame-retardant PET masterbatches and preparation method and application thereof

Abstract

The invention discloses PET transparent flame-retardant masterbatches for a film. The masterbatches comprise the following raw materials in percentages by mass: 80-86% of chemically modified PET resin, 8-12% of polyborosilicane, 3-5% of a smoke suppressant, 0.5-2% of a hydrolysis resisting agent, 0.2-1% of an antioxidant, 0.5-1% of a nucleating agent and 0.2-1% of a lubricating agent. According tothe provided PET masterbatches, reactive fire retardant phenyl dichloro sphosphineoxid (BPOD) is introduced into a PET macromolecular main chain by chemical modification, the prepared PET masterbatches have excellent fire retardancy, good mechanical property, processability and transparency can further be maintained, the comprehensive property is excellent, even if the masterbatches are in a solvent and/or ultrasonic vibrating condition for a long time, excellent flame retardancy can still be maintained, and therefore, the masterbatches are particularly suitable for the field in which products still have excellent fire retardancy after being stored for a long time under certain specific conditions (such as solvent, friction and vibration). The PET masterbatches can further be processed and prepared into the PET film, the thickness of the film is 100-150 mu m, and the application range of the PET masterbatches is expanded.

Description

technical field [0001] The invention relates to the technical field of engineering plastics, in particular to a transparent flame-retardant PET masterbatch and its manufacturing method and application, and also relates to a film product made from the transparent flame-retardant PET masterbatch. Background technique [0002] PET, due to its low price, high strength, good elasticity, not easy to wrinkle and deform, and wear-resistant and heat-resistant, has a good development momentum as an engineering plastic and is widely used in industries such as electronics, automobiles, and instrumentation. The above-mentioned industries have high requirements on the safety of spare parts, especially the flame retardant performance. However, PET is flammable, and its limiting oxygen index (LOI) is only 20%-22%, which greatly limits the application of PET. [0003] In the prior art, PET is often modified by adding flame retardant components, which can be divided into chemical modificatio...

AI Technical Summary

Problems solved by technology

From the perspective of existing technologies, the modification of halogen-free flame-retardant PET materials has not ideally solved the contradiction between the flame-retardant properties and mechanical properties of polymer materials, and has not changed the current situation of poor transparency of flame-retardant PET materials. It is a technical problem to develop a flame-retardant transparent PET material with excellent comprehensive properties

[0004] CN103467932A discloses a transparent flame retardant PET masterbatch, the flame retardants used in it are antimony trioxide and decabromodiphenylethane, but the flame retardant materials with halogen flame retardants are limited in application in some flame retardant fields , and the addition of heavy metal antimony may also cause some potential safety hazards, so it is not a green and environmentally friendly flame retardant material

[0005] Patent CN108467574A discloses a transparent flame-retardant PET masterbatch and its film. It is a flame-retardant microsphere with a core-shell structure. The manufacturing process requires nano-processing and electrostatic spraying. The manufacturing process is complicated and expensive, and it is not suitable for large-scale Industrial production and commercial promotion of

[0006] CN107641299A discloses a flame retardant PET masterbatch, which uses a halogen-free organic phosphine flame retardant, but does not disclose the flame retardant and mechanical properties of the material

[0007] Through investigation and research, most of the flame retardant modification of PET in the prior art literature is the addition of flame retardant blending modification. This modification method often has two defects: 1) When the structure of the modified filler and the matrix material are greatly different , the compatibility is not good, and when the addition amount is large, it may affect the mechanical properties and light transmittance of the material; 2) Blending modification belongs to the physical modification method, and the flame retardant and the polymer material have no chemical bond connection. It may be detached from the material due to corrosion by water or organic solvents, or migration in an environment such as ultrasound. On the one hand, it will affect the mechanical properties of the material, and on the other hand, the flame retardancy of the material will be adversely affected.

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