C5C9 copolymer resin

C5/C9Copolymerizde Resin

I. Product IntroductionC5/C9 copolymerized petroleum resin is a light yellow granular thermoplastic solid resin. It is mainly made of C5 fraction and C9 fraction produced by ethylene plant as raw materials. It is a low molecular weight polymer generated by polymerization reaction under certain temperature and pressure conditions through a special production process. It has good compatibility with natural rubber (NR), synthetic rubber, styrene polymers (such as SIS, SBS, SEBS, EVA), etc., and good compatibility with natural tackifying resins (such as terpenes, rosin and its derivatives). It has the advantages of both C5 petroleum resin and C9 petroleum resin. It has low acid value, good miscibility, water resistance, ethanol resistance and chemical resistance, chemical stability to acids and alkalis, and good viscosity adjustment and thermal stability. Since the structure does not contain polar groups, it has good water resistance, acid and alkali resistance, weather resistance and light aging resistance. It has good solubility in organic solvents, especially in petroleum solvents, and has good compatibility with other resins. It also has certain brittleness, tackification, adhesion and plasticity. It is generally not used alone, but used as a promoter, regulator, modifier and other resins.

2. Product application areas: This product is used as a tackifying resin in hot melt adhesives, pressure-sensitive adhesives, sealants, civil adhesives and other adhesives and rubber and tire fields; it is suitable for rubber, tires, especially radial tires and other high-demand rubber products, which can not only increase the adhesion between rubber particles, but also improve the adhesion between rubber particles and steel wires and cords; in the field of hot melt adhesives, adhesives, and adhesives, this product can not only provide better initial viscosity, but also can be used to adjust the viscosity of the adhesive and resin mixture like rosin resin. Durability and bonding strength. It is suitable for hot melt road marking paint and primer for hot melt road marking paint. In particular, compared with using C5 petroleum resin as primer for hot melt road marking paint, this product makes the paint surface and the road surface have stronger bonding and impact resistance, and is more solid and more effective in preventing the paint surface from falling off. In addition, this product can also be used in paints and inks, such as high-grade printing inks such as printing inks, gravure printing inks, and copperplate printing inks.

二、Advantages of C5C9 Copolymer Resin
I. Comprehensive Compatibility Advantages
It integrates the characteristics of C5 resin and C9 resin, and boasts excellent compatibility with SIS, SBS, EVA, natural rubber and synthetic rubber. It is applicable to most hot melt adhesive and pressure-sensitive adhesive systems without separately blending two types of resins.
It mixes well with various oils, plasticizers and organic solvents, avoiding delamination and precipitation during processing.
II. Balanced Adhesion Performance
Strong initial tack: It retains the high initial tack feature of C5 resin and delivers outstanding instant adhesion, making it ideal for label adhesives, sanitary napkin adhesives and express tapes.
Sufficient cohesive force: It inherits the high cohesive strength of C9 resin with excellent holding power, effectively preventing edge curling, label falling off and debonding, and maintaining stable adhesion under both high and low temperature conditions.
Moderate peel strength balances initial tack and holding power, making up for the drawbacks of single C5 resin (poor holding power) and single C9 resin (weak initial tack).
III. Excellent Processability
It has favorable melt fluidity and moderate melt viscosity, enabling smooth extrusion and coating without frequent die clogging and reducing processing energy consumption.
A wide range of softening point grades (low, medium and high) are available to match different production lines for low-temperature hot melt adhesives and high-temperature weather-resistant adhesives.
It emits less odor than ordinary homopolymerized C9 resin with low volatile content, resulting in minor peculiar smell in workshops and low-odor finished adhesives.
IV. Weather Resistance & Stability
It contains fewer unsaturated double bonds than pure C9 resin, offering stronger oxidation resistance and yellowing resistance, so it hardly turns yellow during long-term storage or high-temperature processing.
Its low acid value ensures good chemical stability. It barely corrodes adhesive equipment and will not accelerate the aging of compounded rubber.
It features good low-temperature toughness, so the adhesive layer is not prone to cracking under low temperature, suitable for adhesive products used outdoors or in cold environments.
V. Cost Performance Advantages
Its performance sits between pure C5 resin and pure C9 resin, while its price is much lower than hydrogenated white resin and pure C5 resin, cutting overall production costs.
A single type of resin can achieve composite adhesion effects, eliminating the need for blending two resins, simplifying formulas and reducing the variety of raw materials in warehouse storage.
VI. Appearance & Application Advantages
The resin has uniform granules that are hard to agglomerate for smooth feeding. Its low ash content prevents haziness and turbidity when producing transparent and light-colored adhesives.

三、Table of Key Technical Parameters for C5C9 copolymer resin