Glass fiber reinforced PBT resin composition with refrigerant precipitation resistance and preparation method of glass fiber reinforced PBT resin composition

The invention discloses glass fiber reinforced PBT (polybutylece terephthalate) resin composition with refrigerant precipitation resistance and a preparation method of the glass fiber reinforced PBT resin composition. The glass fiber reinforced PBT resin composition comprises the following components: 49.0-93.5wt.% of polybutylece terephthalate, 0-40wt.% of glass fiber, 0-1.0wt.% of multifunctional epoxide group chain extender, 0-1.0wt.% of magnalium hydrotalcite acid acceptor, 0-1.0wt.% of end-capping reagent containing 1-3 epoxide groups, 0.2-0.5wt.% of aminosilane coupling agent, 0-8.0wt.% of flexibilizer, 0.2-0.5wt.% of nucleating agent and 0.3-0.5wt.% of antioxygen, wherein the contents of at least two of the multifunctional epoxide group chain extender, the magnalium hydrotalcite acid acceptor and the end-capping reagent containing the 1-3 epoxide groups are not zero simultaneously. The glass fiber reinforced PBT resin composition has a good mechanical property and the refrigerant precipitation resistance, can overcome the defect that micro-molecular substances are precipitated from the current universal refrigerant materials effectively, and can meet the requirements of the current refrigeration compressor industry on refrigerant-proof materials.