金融界2025年4月5日消息,国家知识产权局信息显示,比亚迪股份有限公司申请一项名为“聚氨酯及其制备方法、抛光用复合材料及其制备 方法、抛光垫”的专利,公开号CN 119751792 A,申请日期为2024年10月。专利摘要显示,本申请实施例提供了聚氨酯及其制备方法、抛光用复合材料及其制备方法、抛光垫。本申请实施例提供的聚氨酯通过二异氰酸酯和聚醚多元醇制备得到,聚醚多元醇包括数均分子量≤500g/...
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