Terpene resin: Natural high performance tackifier

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In the 25th National "Safety Production Month" in 2026, everyone pays attention to safety and everyone will conduct emergency investigation and rectification of hidden risks -------------------------------------------------- 1. Product definition Terpene resin is a thermoplastic resin prepared from natural turpentine as raw material through cationic polymerization of α-pinene and β-pinene monomers. It is a renewable bio-based fine chemical material. The product is non-toxic, tasteless, light and transparent, acid and alkali resistant, and has excellent bonding properties. It is a tackifier in the fields of adhesives, rubber modification, coatings and inks, and food gum bases. The phenomenon of terpene resin polymerization was discovered in 1789 and was the first to be industrialized in the United States in 1930. my country started technology research and development in the late 1960s, and Shanghai, Guangdong, Fujian and other places took the lead in building small and medium-sized test devices. ； In 2003, Shanghai built China's first 10,000-ton continuous production unit, marking the entry of domestic terpene resin into the stage of large-scale industrialization. 2. Physical and chemical properties The product is insoluble in water, methanol, ethanol, acetone and other polar solvents, and is completely soluble in toluene, benzene, petroleum ether, turpentine, vegetable oil and other aliphatic and aromatic hydrocarbon solvents. It has stable chemical properties, heat resistance, light resistance, dilute acid and alkali resistance, not easy to oxidize and crystallize, excellent insulation, non-toxic and environmentally friendly. Its molecular skeleton is similar to that of natural rubber, and has excellent compatibility with SIS, SBS, natural rubber, and polyolefin systems. It is an excellent viscosity-increasing additive for rubber and elastomers. 3. Production process 3.1 Source of raw materials The core raw material is turpentine obtained by distillation of rosin, in which α-pinene content exceeds 70% and β-pinene accounts for 5%–30%. Both are core monomers for polymerization. my country is the world's main turpentine producer, accounting for more than 40% of the world's output, providing sufficient raw material support for the terpene resin industry. 3.2 Traditional polymerization process The traditional process uses AlCl₃+SbCl₃ composite catalytic cationic polymerization.: Turpentine and toluene solvent are reacted at a constant temperature of 40-50°C in a reactor for 7 hours, and the finished product is obtained through water washing, layering, vacuum distillation, condensation and filtration. This process is highly mature, but it has problems such as catalyst residue, easy emulsification, and excessive heavy metals. It cannot be adapted to high-end scenarios in food and medicine. 3.3 Improvement process The mainstream improvement route in the industry uses chlorosilane cocatalyst to replace antimony trichloride, completely eliminating antimony metal residues and significantly reducing chloride ions, aluminum ions and toluene residues. Improved product key indicators: Chlorine content <100mg/kg, metallic aluminum <5mg/kg, toluene residue <25mg/kg, fully compliant with US FDA food contact standards and Chinese Pharmacopoeia solvent residue limits, and can be used in high-end fields such as food gum bases and medical excipients. IV. Downstream applications 1. Adhesive field: It is suitable for EVA hot melt adhesive, SIS/SBS ​​elastomer hot melt adhesive, label pressure-sensitive adhesive, and solvent-based rubber adhesive. It can make up for the water seepage defect of C5 petroleum resin and balance the initial viscosity, cohesion and heat resistance. ； 2. Rubber modification: Used for tackification and reinforcement of natural rubber, synthetic rubber, and latex to improve product molding stability ； 3. Coatings and inks: Used in exterior wall coatings, fire retardant coatings, and packaging and printing inks to improve adhesion and weather resistance. ； 4. Food daily chemicals: Food-grade products are the basic raw materials of gum-based candies, which are compliant and safe and have no odor residue. 5. Global and Domestic Market Structure 5.1 Global Production Capacity Structure The current global high-end market is monopolized by international leaders. Core companies include American Caton (formerly Arizona Chemical), Pinova, Japan's Arakawa Chemical, Germany's BASF, etc. From 2024 to 2025, the world's new production capacity will mainly land in China and Brazil. The global market share of domestic high-end products will steadily increase from 28% in 2025 and is expected to reach 35% in 2027. 5.2 Current Situation of China's Industry The domestic industry has developed for more than sixty years, from early small-scale installations in Shanghai, Guangdong, and Fujian to the launch of a 10,000-ton continuous production line in Shanghai in 2003, and has now become the world's largest producer and consumer. Domestic manufacturers include Guangdong Xingguang Grease and Shanghai Jufu Chemical, etc., with sufficient production capacity for general-grade terpene resins, but there are still structural gaps in high-end light-colored, low-residue, hydrogenated modified terpene resins, and high-end import dependence is high. 6. Industry development trends 1. Process greening: The traditional composite catalytic process is gradually phased out, and the low-residue, heavy-metal-free, and low-VOC green synthesis process is fully popularized. The products are suitable for food, medical, and high-end electronic scenarios. ； 2. High-end products: High value-added products such as hydrogenated terpenes and terpene phenol modification have become the main force in the increase, replacing traditional petroleum resins and adapting to high-precision fields such as new energy adhesives and medical pressure-sensitive adhesives. ； 3. Domestic substitution accelerates: Domestic continuous production and precision purification technology iterations have gradually broken the monopoly of overseas companies in the field of high-end light-colored, narrow-distribution terpene resins ； 4. Prominent value of bio-based products: Relying on the renewable properties of natural turpentine and complying with the dual-carbon policy, it has become a core category of green upgrading of chemical materials. 5. Terpene resin is a classic natural forest chemical material with the comprehensive advantages of non-toxic, environmentally friendly, high compatibility, strong bonding and aging resistance. my country has outstanding raw material resource advantages and a world-leading production capacity, but there are still shortcomings in high-end modified and ultra-high-purity products. There is broad room for domestic high-end terpene resin import substitution, and the long-term market growth is highly certain.