Toughened PBT (Polybutylene Terephthalate) engineering plastic and preparation method thereof

Abstract

The invention belongs to the field of high polymer material, and relates to engineering plastic, in particular to environment-friendly toughened PBT (Polybutylene Terephthalate) engineering plastic and a preparation method thereof. The toughened PBT engineering plastic comprises the following constituents by weight: 65-89% of PBT resin, 10-30% of compound toughening agent, 0.5-3% of compound antioxidant, and 0.5-2% of lubricant. The obtained PBT engineering plastic material has the advantages of low cost, super toughness at normal temperature, low temperature resistance, chemical solvent resistance at high temperature, complied with the RoHS and REACH statutory environmental requirements of the European Union and solves the problems that the traditional toughening-agent toughened PBT engineering plastic has high impact toughness and low material blending strength at high temperature, the material becomes fragile in practical use as the high impact toughness of the material is decreased when being used at the temperature below zero, and the material becomes fragile from tough when in contact with chemical solvent (refrigerating fluid and refrigerant) at high temperature.

Description

technical field [0001] The invention relates to the field of polymer materials, and relates to an engineering plastic, in particular to an environment-friendly toughened polybutylene terephthalate engineering plastic and a preparation method thereof. Background technique [0002] Polybutylene terephthalate (PBT) is a traditional semi-crystalline engineering plastic. As an important thermoplastic engineering plastic, it is widely used in industries such as automobiles, electronics, and electrical appliances. It has high crystallinity and crystallization rate and excellent processing performance, and has become an important member of the five general-purpose engineering plastics, but the disadvantages of low notched impact strength of pure PBT and its poor resistance to chemical solvents at high temperatures limit its use. Further expansion of the scope of application. [0003] For a long time, it is difficult to modify polybutylene terephthalate (PBT) engineering plastics li...

AI Technical Summary

Problems solved by technology

However, simply using elastomer toughened PBT to obtain high impact toughness results in a significant drop in material strength, and when the material is used at low and sub-zero temperatures, the high impact toughness of the material is greatly reduced, and at the same time under high temperature conditions And when it is actually used in contact with chemical solvents, the toughness of the material becomes very poor, so it limits its use in the refrigeration industry, sports equipment and require good toughness at low temperatures and contact with chemical solvents at high temperatures requires materials to have good toughness applications in the field of demand

[0004] Because the usual toughened PBT engineering plastics only have good toughness at room temperature, but cannot achieve the "super-tough" effect, and are not resistant to chemical solvents at low temperatures and high temperatures.

Images