A. Paint: Paint formulations primarily utilize high softening-point C9 petroleum resins, DCPD resins, and C5/C9 copolymer resins. The incorporation of petroleum resins into paint enhances gloss, improves film adhesion, increases hardness, and boosts resistance to acids and alkalis.
　　B. Rubber: Rubber formulations primarily utilize low‑softening‑point C5 petroleum resins, C5/C9 copolymer resins, and DCPD resins. These resins exhibit excellent miscibility with natural rubber latex and exert minimal influence on the vulcanization process. Incorporating petroleum resins into rubber enhances adhesion, provides reinforcement, and imparts softening. In particular, the addition of C5/C9 copolymer resins not only increases inter‑particle cohesion but also improves the bonding between rubber particles and cord plies, making them well suited for high‑performance rubber products such as radial tires.
　　C. Adhesives Industry: Petroleum resins exhibit excellent adhesion; incorporating them into adhesives and pressure-sensitive tapes can enhance adhesive strength, acid resistance, alkali resistance, and water resistance, while also effectively reducing production costs.
　　D. Ink Industry: Petroleum resins used in inks are primarily high‑softening‑point C9 petroleum resins and DCPD resins. Adding petroleum resins to inks enhances color development, accelerates drying, boosts gloss, and improves overall printing performance.
　　E. Other: The resin exhibits a certain degree of unsaturation and can be used as a paper-sizing agent, a plastic modifier, and more.

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