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发明公开
CN109294177A 具有良好流动性的耐水解PBT组合物及其制备方法和应用 无效 - 撤回

具有良好流动性的耐水解PBT组合物及其制备方法和应用
摘要：
本发明公开了一种具有良好流动性的耐水解PBT组合物，包括以下组分及重量份数含量：PBT树脂50～70份；玻璃纤维20～40份；增韧剂1～3份；扩链剂1～5份；大分子多功能助剂3～12份；抗水解剂0.2～0.5份；抗氧剂0.2～0.5份；润滑剂0.2～0.5份。本发明PBT组合物在抗水解剂和扩链剂的协同作用下，既降低了PBT的端羧基浓度，同时使PBT分子链重建延长，二者皆能够提高PBT组合物的耐水解性能。通过大分子功能助剂对PBT树脂起到增塑作用，恢复甚至提高PBT的流动性，大分子功能助剂对PBT耐水解性能有进一步提升作用。本发明所得PBT组合物具有优异的耐水解性能，并且保持了良好的加工流动性，注塑制件外观良好，该PBT组合物在10％NaOH溶液中，仍能保持较好的耐碱液性能。
摘要（英）：

The invention discloses a hydrolysis-resistant PBT composition with good fluidity. The hydrolysis-resistant PBT composition comprises the following components in parts by weight: 50 to 70 parts of PBTresin; 20 to 40 parts of glass fiber; 1 to 3 parts of a toughening agent; 1 to 5 parts of a chain extender; 3 to 12 parts of a macromolecular multifunctional additive; 0.2 to 0.5 parts of an anti-hydrolysis agent; 0.2 to 0.5 parts of an antioxidant; and 0.2 to 0.5 parts of a lubricant. Under synergistic action of the anti-hydrolysis agent and the chain extender, the PBT composition of the invention not only reduces a carboxyl end group concentration of PBT, but also prolongs the reconstruction of a PBT molecular chain, so that the hydrolysis resistance of the PBT composition can be improved.The PBT resin can be plasticized through the macromolecular functional additive, the fluidity of PBT can be restored or even improved, and the macromolecular functional additive can further enhance the hydrolysis resistance of PBT. The PBT composition obtained by the invention has excellent hydrolysis resistance and maintains good processing fluidity, the appearance of the injection molded part is good, and the PBT composition can maintain good lye resistance performance in a NaOH solution with concentration being 10%.

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