Maleic anhydride derivative is an anhydride produced from maleic anhydride. The raw materials mainly include maleic anhydride, butadiene, mixed C4, mixed C5 and other basic chemical products. There are many kinds of maleic anhydride derivatives, including methyl tetrahydrophthalic anhydride, methyl hexahydrophthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, methyl nadic anhydride, methyl tetrahydrophthalic anhydride and so on. They are mainly used to synthesize polyester resin, epoxy resin curing, etc.

下游以電子封裝（半導體、LED）、電氣絕緣（變壓器、互感器）、涂料（PCB油墨、UV涂料）等領域為主，被應用在電子元器件、電氣設備、涂料等多種領域，市場需求較高。

The downstream is mainly in the fields of electronic packaging (semiconductors, LEDs), electrical insulation (transformers, transformers), coatings (PCB ink, UV coatings) and so on. It is applied in various fields such as electronic components, electrical equipment, coatings and so on, with high market demand.

更關鍵的是，今年高層提出內循環這個新名詞，明確表示進行內循環和外循環的雙輪驅動來穩定國內經濟，并且目前逆全球化的事件也越來越多，未來實現完全的自主可控才是內循環的關鍵所在。（政策支持、發展方向明確）

More importantly, this year, the high-level put forward the new term of internal circulation, which made it clear that the two wheel drive of internal circulation and external circulation will stabilize the domestic economy. At present, there are more and more anti globalization events, and the key to the internal circulation is to realize complete autonomy and control in the future（ National policy support and clear development direction)

我國順酐酸酐衍生物行業起步較晚，但隨著近幾年國內化工產業的發展，逐漸打破了國外壟斷的局面，產品種類不斷增長，當前國內工藝較為成熟的產品有四氫苯酐、甲基四氫苯酐等。

China's maleic anhydride derivative industry started late, but with the development of domestic chemical industry in recent years, it has gradually broken the situation of foreign monopoly, and the types of products are growing. At present, the products with mature domestic production technology include tetrahydrophthalic anhydride, methyl tetrahydrophthalic anhydride, etc.