rubber mainly uses C5 petroleum resin with low softening point, C5/C9*** poly resin and DCPD resin. Especially, the addition of C5/C9*** poly resin can not only increase the adhesion between rubber particles, but also improve the adhesion between rubber particles and tire cord, which is suitable for rubber products with high requirements such as radial tires. Petroleum resin is a general term for resinous substances that are polymerized by olefins or cyclic olefins, by-products of cracked petroleum, or with aldehydes, aromatic hydrocarbons, terpenoids and other compounds. Petroleum resin has the characteristics of low acid value, good miscibility, low melting point, water resistance, ethanol resistance and chemical resistance. Uses of petroleum resin: 1. Used in coating industry, such as petroleum resin emulsion used to strengthen synthetic latex coating, and light petroleum resin used to make oily varnish to improve gloss and adhesion; 2. Used in rubber industry, using resin with low softening point as plasticizer and resin with high softening point to improve the hardness of synthetic rubber; 3. Used to prepare hot melt adhesive, traffic traffic paint, printing ink and paper hydrophobic agent. Polyurethane is the abbreviation of polyurethane, and its English name is polyurethane. It is a polymer material. Polyurethane is a new organic polymer material, known as "the fifth largest plastic", and is widely used in many fields of national economy because of its excellent performance. The product application fields involve light industry, chemical industry, electronics, textiles, medical treatment, architecture, building materials, automobiles, national defense, aerospace, aviation ... 1. Applications in daily life are: furniture industry applications 1. Paint, paint, adhesives, sofas, mattresses, seat armrests, household appliances applications 1. Electrical insulation paint 2. Wire and cable sheaths 3. Refrigerators, freezers, disinfection cabinets, Insulation layer such as water heater 4. Waterproof potting glue for electronic devices of washing machine 1. Waterproof insulation layer for roof, cold storage insulation, internal and external wall coating 6. Floor paint, synthetic wood, runway, waterproof plugging agent 1. Plastic floor transportation industry application 1. Aircraft, car interior seats, handrails, headrest, door inner panel, instrument panel, steering wheel, bumper, damping pad, fender 2. Carpet lining, Paint 3. Insulation parts, pipes 4. Sealing gasket 5. Application of snow chains in shoemaking and leather industry 1. Inside and outside soles 2. Adhesive 3. Leather finishing agent 4. Artificial leather and synthetic leather coating plastic sports ground (including laying of basketball, volleyball, badminton, tennis courts and runways) and sportswear (dance clothes, swimsuits and dance clothes) in sports industry; Sports shoes and scooters. 2. The specific applications of various polyurethane materials are: 1. PU soft foam FlexiblePU cushion materials-such as seats, sofas, mattresses, etc. Polyurethane soft foam is an ideal cushion material, and the cushion material is also the application field with the largest amount of soft foam; Sound-absorbing material-porous polyurethane soft foam has good sound absorption and shock absorption function, and can be used as indoor sound insulation material; Fabric composites-shoulder pads, bra sponges, cotton pads; Toys 2, PU rigid foam RigidPU refrigeration equipment-such as refrigerators, freezers, cold storage, refrigerated trucks, etc., polyurethane rigid foam is the most ideal thermal insulation material for refrigeration equipment; Thermal insulation of industrial equipment-such as storage tanks and pipelines; Building materials-In developed countries in Europe and America, rigid polyurethane foam for building accounts for about 7% of the total consumption of rigid foam, which is more than double the consumption of rigid foam such as refrigerators and freezers; In China, the application of hard foam in the construction industry is not as common as that in western developed countries, so the development potential is very great; Transportation industry-such as car roof, interior parts (steering wheel, dashboard), etc.; Wood-like-high-density (density 3~7kg/m3) rigid polyurethane foam or glass fiber reinforced rigid foam is a structural foam, also known as wood-like, which has the characteristics of high strength, good toughness, dense and tough crust, simple molding process, high production efficiency, etc. The strength is higher than that of natural wood, and the density is lower than that of natural wood, so it can be used as various high-grade products instead of wood.