PBT/PET alloy material and preparation method thereof

Abstract

The invention relates to a PBT / PET alloy material and a preparation method thereof. The PBT / PET alloy material is prepared from the following raw materials in parts by weight: 30-70 parts of PBT resin, 10-30 parts of PET resin, 20-40 parts of glass fibers, 1-3 parts of a flexibilizer, 0.5-1 part of a nucleating agent, 0.5-2 parts of a compound glass fiber exposure agent, 1-3 parts of zirconium phosphate and 0.2-0.6 part of an antioxidant, wherein the compound glass fiber exposure agent is prepared by mixing a fatty acid amide lubricant, an organosiloxane lubricant and an olefin wax lubricant in a mass ratio of (2-5): (2-5). The PBT resin is low viscosity resin, the characteristic viscosity of which is 0.65-0.85 dL / g. The PET resin is low viscosity resin, the characteristic viscosity of which is 0.50-0.80 dL / g. The alloy material is high in content of glass fibers and has excellent mechanical property, heat resistance and appearance.

Description

Technical field [0001] The invention relates to the technical field of polymer materials, in particular to PBT / PET alloy materials and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is one of the five general engineering plastics. It is a crystalline thermoplastic polyester with excellent heat resistance, electrical insulation, processability, low water absorption and chemical resistance The characteristics of solvents have been widely used in the fields of electronics and electrical engineering, automobiles, and home appliance parts. With the increasing use of PBT materials, various industries have higher and higher requirements for various properties of materials. PBT materials without glass fiber reinforcement have poor mechanical properties, large molding shrinkage, and low heat distortion temperature. Defects cannot meet many product usage requirements. Therefore, the glass fiber reinforced modification of PBT material is of gr...

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Problems solved by technology

[0004] In response to the above problems, some research has been done on improving the problem of glass fiber reinforced PBT floating fibers in the current prior art. For example, Chinese patent CN106987102A discloses a heat-resistant, shock-resistant, low-floating short fiber reinforced PBT / ABS alloy that can be used for electrical housings The material and its preparation method improve the floating fiber only through short glass fibers; Chinese patent CN106366584A discloses low floating fiber high gloss glass fiber reinforced polyethylene terephthalate, using transparent resin to improve material gloss and improve floating fiber; China Patent CN 106084685A, Chinese patent CN103709680A and Chinese patent CN103665792A and many other patents all report a low-floating fiber flame-retardant reinforced PBT material, all of which improve the floating fiber by adding an anti-glass fiber exposure agent; Chinese patent CN105199338A discloses a high Flame retardant reinforced PBT composition with low performance and low floating fiber and its preparation method. The glass fiber leakage improving agent is PET. This patent has not verified the effect of improving floating fiber when the glass fiber content is greater than 30%.

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