Development and application of new rubber materials

Recently, famous scholars in the field of rubber material synthesis, well-known experts in domestic and foreign synthetic rubber research and production enterprises, technical experts in tires and other rubber products industries, and other market research professionals have summarized and exchanged new rubber materials in China. R & D, production and application, analysis and prospects of China's rubber material development trends and market prospects.

At present, China has already had the conditions for building a tire testing ground. The enthusiasm of tire companies has been unprecedentedly high, and it has already been acted upon. Some private investment groups are also very optimistic about this project. In view of the huge investment in the construction of the tire testing ground and the high maintenance costs, it is difficult to maintain in the case of insufficient test volume. It is recommended that on the basis of pre-existing risk assessment based on specialized agencies, the state will take the lead and the association will participate in the construction of a domestic public-type tire testing ground for the whole industry. '
Wang Fengju, Secretary General of the Rubber Materials Professional Committee of China Rubber Industry Association, briefly introduced the changes in the world rubber production capacity and product development trends in the past 10 years, reminding relevant industries to pay attention to product and capacity development structure issues. :

Yu Guozhu, deputy chief engineer of Yanshan Branch of Sinopec Beijing Research Institute of Chemical Industry, gave a report titled “Progress in Research and Development of New Synthetic Rubber Materials in China”. The new synthesis technology of rare earth isoprene rubber and butadiene rubber, dissolved polystyrene butadiene rubber, lithium-based integrated rubber SIBR, butyl rubber and bromobutyl rubber was introduced. Sinopec independently developed the rare earth isoprene rubber technology, and the lanthanum isoprene rubber quaternary catalyst system passed the pilot test and 30,000 tons of annual process package identification. Energy consumption indicators and product performance have reached the international advanced level, forming 10 patents. The 60,000-ton annual installation is under construction. PetroChina's lanthanide isoprene rubber technology passed the pilot test and industrial plant planning. The 15,000-ton annual ND-IR unit of Maoming Luhua Chemical Company has been put into production. Qingdao Ikos rare earth isoprene rubber 30,000 tons of annual equipment is under construction. 100,000 tons of annual trans-polyisoprene rubber are under construction. Yu Guozhu gave a brief description of the application of the above synthetic rubber new products. Application research proves that the integrated rubber SIBR has good processing performance, good wet skid resistance, low rolling resistance and low heat generation. It is an ideal rubber for high performance tires. Yanshan IR replaces 15 parts and 30 parts of NR compound with 100 parts of NR phase. Compared with physico-mechanical properties and heat generation, elasticity, cutting resistance, rolling resistance and performance of 100 parts of NR compound, wear resistance and flexing are better than NR, aging performance is similar to NR compound, with increasing aging time , the aging performance of the alternative rubber is better than the NR compound

Professor Huang Baozhen, a doctoral tutor at Qingdao University of Science and Technology, introduced the performance characteristics and application test of the trans-isoam rubber series products he invented at the meeting. The molecular structure of trans-isoprene rubber is trans-1,4-polyisoprene, also known as synthetic eucommia rubber, gutta-percha or balata, which is the same as cis-isoprene and natural rubber. isomer. Trans isomerized rubber prepared in different vulcanization stages has different properties and uses. The trans-isoprene rubber prepared by zero cross-linking degree is a crystalline hard plastic, which can be used for medical splint, orthopedic rehabilitation equipment, etc. The trans-isoprene rubber prepared by low cross-linking degree is a shape memory functional material and can be used for heat. Shrinking tube, joint sealing packaging material, etc. The trans-isoprene rubber prepared by high cross-linking degree is an amorphous soft rubber elastic material, which can be used for preparing energy-saving and environment-friendly tires, various rubber products and the like. The outstanding feature of the trans-isoprene rubber is that the rolling resistance is small, the heat generation is lowered, and the fatigue resistance and wear resistance can be improved. Professor Huang introduced that trans-isoprene rubber is widely used as a general-purpose rubber that is more expensive than NR from a special rubber that is expensive (more than ten times that of natural rubber) to a rubber product such as a tire. The market prospect is infinite. At present, China's first demonstration of 30,000 t / a industrial production equipment is under construction.
Mr. Lin Dawei, Manager of the Chemicals Department of Ube Industries, Hong Kong, introduced the UBEPOL-VCR products developed and produced by the company. This product is made by dispersing high-melting, high-crystallized 1,2- syndiotactic polybutadiene in high-cis 1,4 polybutadiene rubber, which is called cis 1,4 polybutadiene. The olefin composite rubber, 1,2-meta-butadiene, is a very fine resin crystal which is highly reinforced in high cis-1,4 polybutadiene and has more properties than ordinary butadiene rubber. Good processing performance and dimensional stability, lower rubber shrinkage, high hardness, high modulus, excellent wear resistance and flexural crack growth. With this performance feature, it can be applied to all steel meridians. Improve the rigidity and flexibility of the bead of the tire by adding the tire sidewall rubber, wear-resistant rubber and under-bead apex. This product has been widely used in Japan and European countries. Some tire companies in China have also used this product continuously in recent years. According to reports, the use of this product can reduce tire weight, reduce manufacturing costs; reduce tire rolling resistance, reduce fuel consumption; low heat generation, extend tire life.

 At the meeting, Hua Jing, an associate professor of Qingdao University of Science and Technology, introduced the performance and application test of the new branched and grafted high vinyl polybutadiene rubber jointly developed by Qingdao University of Science and Technology and Qilu Synthetic Rubber Factory. The study involved the introduction of structurally controlled branching in the molybdenum-catalyzed butadiene coordination polymerization to prepare partially branched or grafted 1,2-polybutadiene. The molybdenum-based high-vinyl polybutadiene rubber has a 1,2-structure content of more than 80%, excellent tensile strength, and is particularly resistant to wet skid, heat aging, and low heat build-up, and is compatible with natural rubber. The blend has both the advantages of natural rubber and styrene-butadiene rubber and shows good overall performance. It can partially replace the SBR which has good wet skid resistance but high heat generation and large rolling resistance. Molybdenum-based Mo-HVPB is the same as the monomer and solvent used in the nickel-based BR9000. The production process is similar and it is easy to produce on the nickel-based production line. 1,2-PB is an ideal elastomer material for the preparation of high-speed tires due to its unique wet skid resistance, low heat generation and good heat-resistant oxygen aging. It is also an excellent material for the manufacture of car and aircraft tires. It is highly valued in the tire industry. HVPB is widely used in many fields such as plastics (ABS, HIPS), coatings, adhesives, functional polymers, etc. It can also be used to prepare modifiers for films, fibers, and rubber products.