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1.发明公开
公开(公告)号：EP4368656A1
公开(公告)日：2024-05-15
申请号：EP22862525.7
申请日：2022-01-27
发明人： FENG, Wutong , ZHAO, Yuanbo , LIU, Xiucai
摘要： The present invention provides a high temperature resistant semi-aromatic polyamide resin and a preparation method therefor, a composition and a molding product. Polymeric monomers of the polyamide resin include a diamine monomer and a diacid monomer, the diamine monomer includes a diamine monomer A1 and a diamine monomer A2, and the diacid monomer includes a diacid monomer B1 and a diacid monomer B2, wherein the carbon atom number CA1 of the diamine monomer A1 and the carbon atom number CA2 of the diamine monomer A2 satisfy that CA1-CA2≥4, the diacid monomer B1 is selected from aromatic dicarboxylic acids with a carbon atom number of 7-12 and derivatives thereof, and the diacid monomer B2 is selected from aliphatic dicarboxylic acids with a carbon atom number of 4-18. The polyamide resin of the present invention has better fluidity. The greater the degree of randomness of the polymer chains and the less entanglement between the chains, the better the fluidity of the copolyamide. By means of a one-step condensation polymerization process for the high-temperature-resistant semi-aromatic polyamide of the present invention, melting and discharging are easy, and a melt has good fluidity and stability.
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2.发明公开
公开(公告)号：EP4357391A1
公开(公告)日：2024-04-24
申请号：EP22840931.4
申请日：2022-01-27
发明人： FENG, Wutong , ZHAO, Yuanbo , LIU, Xiucai
摘要： The present disclosure provides a high temperature resistant semi-aromatic copolyamide, its preparation method, compositions, and molded product. The monomer raw materials of the high temperature resistant semi-aromatic copolyamide comprise diacid monomers and diamine monomers. The diacid monomers include but not limited to aromatic diacid and/or the derivatives of the aromatic diacid and aliphatic diacid. The diamine monomers include but not limited to decamethylene diamine and pentamethylene diamine. The molar ratio of the decamethylene diamine to the pentamethylene diamine is (1-30):1. The high temperature resistant semi-aromatic copolyamide provided in the present disclosure has outstanding heat resistance, mechanical strength, low water absorption, dimensional stability and low yellow index. The present disclosure adopts one-step method which takes water as the reaction medium to prepare the copolyamide PA10T/5T/5X/10X, and has such advantages as environment protection, simple operation, low cost and high production efficiency.
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