濮阳惠成：顺酐酸酐衍生物产品主要用于环氧树脂固化、合成聚酯树脂和醇酸树脂等，广泛应用在电气设备绝缘材料等领域

Group 1 - The company, Puyang Huicheng (300481), primarily engages in the research, production, and sales of anhydride derivatives and functional material intermediates, which are classified as fine chemicals [1] - The products are widely used in various fields, including electronic component packaging materials, electrical equipment insulation materials, wind power, composite materials, and coatings [1] - Anhydride derivatives are mainly utilized in epoxy resin curing, synthetic polyester resin, and alkyd resin, with significant applications in electrical equipment insulation materials [1]