金融界2025年3月28日消息,国家知识产权局信息显示,中国石油化工股份有限公司申请一项名为“聚酯材料及其制备方法和应用”的专利,公开号CN 119686027 A,申请日期为2023年9月。专利摘要显示,本发明涉及高分子材料领域,公开了一种聚酯材料及其制备方法和应用,所述聚酯材料在频率小于1000Hz条件下的平均吸音系数为0.61‑0.95,在频率大于5000Hz条件下的平均吸音系数为0.64‑...
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