C9 Resin factory said that C9 Resin is also known as hydrocarbon resin. It is widely used in rubber, adhesives, coatings and inks. It is a multi-purpose and multifunctional additive material. Petroleum resin has both softening and viscosity-increasing effects in rubber and filling and reinforcing effects. Generally, a rubber petroleum tackifying resin having a softening point of less than 100 ° C and a rubber petroleum reinforcing resin having a softening point of 120 ° C or more are referred to. They can completely replace the coal tar-based coumarone (benzofuran-indene) resin and some natural resins such as rosin. It is an ideal compounding material for rubber processing, and its use is growing rapidly.
1 Classification and use of petroleum resins
C9 Resin manufacturers said that petroleum resins are mainly oligomers composed mainly of olefins, diolefins, cyclic olefins, and styrene derivatives and heterocyclic compounds. The number average molecular weight is from 30 to 3,000, and the softening point is from 5 to 150 ° C. It is a thermoplastic viscous liquid or solid. Depending on the source of the raw materials and the polymerization method, it is generally divided into: C5 (aliphatic hydrocarbon resin), C5/C9 (aliphatic hydrocarbon-aromatic hydrocarbon resin), C9 (aromatic hydrocarbon resin) and DCPD petroleum resin (dicyclopentadiene resin). Big class. C5 resin can be further divided into three types: general-purpose, blended, and colorless and transparent. DCPD resin is available in three types: normal type, hydrogenated type and light color type. C5 petroleum resin has a softening point of around 100 °C and is mainly used as a tackifier in NR and IIR compounds. C9 petroleum resin softening point is 90 ~ 100 °C, mainly used in inks and coatings; C9 petroleum resin with softening point above 120 °C can also be used as rubber reinforcing agent. C5/C9 petroleum resin is a combination of C5 and C9 resins with a softening point of 90 to 100 °C. It is mainly used in rubber and styrene thermoplastic elastomers such as N R and SBR. DCPD petroleum resin has a softening point of 80 to 100 °C for tires, coatings and inks. Hydrogenated DCPD resins have softening points up to 100 to 140 ° C and are used in a wide range of styrenic thermoplastic elastomers and plastics.
2 Performance and application of petroleum resin
PETROLEUM RESIN factory mentioned that The softening point of petroleum resins is one of the most important indicators for measuring the properties of resins. It depends on the relative molecular mass and is usually used as the basis for the classification of petroleum resins. The most common softening point in the industry is 90 to 110 ° C, and its relative molecular mass is between 1 000 and 1 400. The highest softening point is 140 to 150 °C, and the lowest is 20 to 30 °C. Petroleum resins with a molecular weight below 600 are liquid.
Petroleum resin is very soluble in petroleum solvents, has good compatibility with rubber and other resins, and has good aging resistance. Petroleum resin is a good compounding agent for NR and SR. When used as a reinforcing agent, 10 to 15 parts can increase the tensile strength and elongation at break of rubber by 10% to 30% respectively. As a softener, add it. After 5 to 10 parts, the rubber mixing can be obviously improved, and the plasticity and viscosity of the rubber compound can be improved. For special blending, further expansion of the blending amount can also improve the water resistance, acid and alkali resistance and electrical insulation properties of the rubber.
At present, China's rubber industry has reached 1.5 million tons of rubber per year, of which tires account for nearly half of the rubber, and the demand for petroleum resins should be no less than 20,000 tons. The annual output of adhesives in China is 2 million tons. Among them, a large number of pressure-sensitive adhesives, hot melt adhesives and sealants can replace natural resins with petroleum resins, and the number is estimated to be at least 10,000 tons.
In short, petroleum resin is an ideal compounding material for the rubber industry and should be vigorously researched and developed and actively promoted. In addition to the rubber industry, petroleum resins are indispensable additives for the coatings and ink industries. Petroleum Resin C9 manufacturers said that petroleum resins are also widely used in plastic modifiers, paper sizing agents and concrete additives, and the development prospects are very broad.