2. Styrene-Butadiene Rubber (SBR) Butadiene and styrene **** polymer. Performance close to natural rubber, is currently the largest production of general-purpose synthetic rubber, which is characterized by abrasion resistance, aging resistance and heat resistance over natural rubber, the texture is also more uniform than natural rubber. Disadvantages are: lower elasticity, anti-flexing, tear resistance is poor; poor processing performance, especially poor self-adhesion, low strength of raw rubber. Temperature range: about -50℃ ~ +100℃. Mainly used instead of natural rubber to make tires, rubber plates, hoses, rubber shoes and other general-purpose products.
3. cis-butadiene rubber (BR) is a cis-structured rubber polymerized from butadiene. Advantages are: excellent elasticity and abrasion resistance, good aging resistance, excellent low temperature resistance, small heat generation under dynamic load, easy metal bonding. Disadvantages: low strength, poor tear resistance, poor processing performance and self-adhesion. Use of temperature range: about -60 ℃ ~ +100 ℃. Generally more and natural rubber or styrene-butadiene rubber and use, mainly to make tire treads, transport belts and special cold products.
4. Isoprene rubber (IR) is a cis-structured rubber polymerized from isoprene monomer. Chemical composition, three-dimensional structure and natural rubber is similar to the performance is very close to natural rubber, so there are synthetic natural rubber called. It has most of the advantages of natural rubber, aging resistance is better than natural rubber, elasticity and strength is slightly lower than natural rubber, processing performance is poor, the cost is higher. Temperature range: about -50 ℃ ~ +100 ℃ can replace the natural rubber production of tires, rubber shoes, hoses, tapes and other general-purpose products.
5. Chloroprene rubber (CR) is made of chloroprene monomer emulsion polymerization of polymers. This rubber molecule contains chlorine atoms, so compared with other general-purpose rubber: it has excellent resistance to oxygen and ozone, non-flammable, self-extinguishing after fire, oil resistance, solvent resistance, acid and alkali resistance, as well as resistance to aging, airtightness, etc.; its physical and mechanical properties are also better than natural rubber, so it can be used as a general-purpose rubber, but also can be used as special rubber. The main disadvantages are poor cold resistance, specific gravity, relatively high cost, electrical insulation is not good, easy to stick roll, easy to burn and easy to stick mold processing. In addition, the stability of raw rubber is poor, not easy to save. Temperature range: about -45℃～＋100℃. Mainly used in the manufacture of ozone-resistant, ageing-resistant cable sheath and various protective cover, protective cover; oil-resistant, chemical-resistant hose, tape and chemical lining; flame-resistant rubber products for underground mining, as well as a variety of molded products, seals, mats, adhesives and so on.
6. Butyl rubber (IIR) is isobutylene and a small amount of isoprene or butadiene **** polymer. The biggest feature is good airtightness, ozone resistance, aging resistance, high heat resistance, long-term working temperature can be under 130 ℃; inorganic strong acid (such as sulfuric acid, nitric acid, etc.) and general organic solvents, vibration absorption and damping characteristics, electrical insulation is also very good. Disadvantages are poor elasticity, poor processing performance, slow vulcanization speed, poor adhesion and oil resistance. Temperature range: about -40℃ ～＋120℃. Mainly used as inner tubes, water tires, balloons, wire and cable insulation, chemical equipment lining and shockproof products, heat-resistant transport belts, heat-resistant aging tape products.
7. NBR (NBR) Butadiene and acrylic **** polymer. Characterized by gasoline and aliphatic hydrocarbon oil resistance is particularly good, second only to polysulfide rubber, acrylate and fluoroelastomer, but better than other general-purpose rubber. Heat resistance is good, air tightness, abrasion and water resistance are good, strong bonding. Disadvantages are poor cold and ozone resistance, low strength and elasticity, poor acid resistance, poor electrical insulation, and poor resistance to polar solvents. Temperature range: about -30℃ ~ +100℃. Mainly used in the manufacture of various oil-resistant products, such as hoses, sealing products.
8. Hydrogenated NBR (HNBR) Butadiene and acrylic **** polymer. It is obtained by total or partial hydrogenation of NBR butadiene in the double bond. It is characterized by high mechanical strength and abrasion resistance, better heat resistance than NBR when crosslinked with peroxide, and other properties are the same as those of NBR. The disadvantage is higher price. Temperature range: about -30℃ ~ +150℃. Mainly used for oil resistance, high temperature sealing products.
9. Ethylene Propylene Rubber (EPM\EPDM) Ethylene and propylene **** polymer, generally divided into binary ethylene propylene rubber and ternary ethylene propylene rubber. Characterized by ozone resistance, ultraviolet resistance, weather resistance and aging resistance is excellent, ranking first in general-purpose rubber. Electrical insulation, chemical resistance, impact elasticity is very good, acid and alkali resistance, small specific gravity, can be high filling with. Heat resistance up to 150 ℃, resistant to polar solvents - ketone, ester, etc., but not resistant to aliphatic hydrocarbons and aromatic hydrocarbons, other physical and mechanical properties slightly inferior to natural rubber and better than styrene butadiene rubber. Disadvantage is that the self-adhesive and mutual adhesion is very poor, not easy to bond. Temperature range: about -50℃～+150℃. Mainly used as chemical equipment lining, wire and cable sheath, steam hose, heat-resistant transportation belt, automotive rubber products and other industrial products.
10. Silicone rubber (Q) for the main chain containing silicon, oxygen atoms of the special rubber, which plays a major role is the element of silicon. Its main feature is both high temperature (up to 300 ℃) and low temperature (minimum -100 ℃), is currently the best hood Ai cold, high temperature rubber; at the same time, excellent electrical insulation, thermal oxidation and ozone stability is very high, chemically inert. Disadvantages are lower mechanical strength, oil resistance, solvent resistance and poor acid and alkali resistance, more difficult to vulcanize, more expensive. Temperature: -60℃～＋200℃. Mainly used in the production of high and low temperature products (hoses, seals, etc.), high temperature wire and cable insulation, due to its non-toxic and tasteless, but also used in the food and medical industry.
11. Fluoroelastomer (FPM) is an organic elastomer made of fluorine-containing monomer **** polymer. Its characteristics of high temperature resistance up to 300 ℃, acid and alkali resistance, oil resistance is the best oil-resistant rubber, radiation, high vacuum performance; electrical insulation, mechanical properties, chemical resistance, ozone resistance, atmospheric aging resistance are excellent. Disadvantages are poor processing, expensive, poor cold resistance, low elasticity and permeability. Use of temperature range: -20 ℃ ~ +200 ℃. Mainly used in the defense industry to manufacture aircraft, rockets on the vacuum, high temperature, chemical corrosion-resistant sealing materials, hoses or other parts and the automotive industry.
12. polyurethane rubber (AU\EU) polyester (or polyether) and diisocyanate compounds polymerized elastomers. It is characterized by good abrasion resistance, in a variety of rubber is the best; high strength, good elasticity, excellent oil resistance. Ozone resistance, aging resistance, airtightness is also excellent. Disadvantages are poor temperature resistance, poor water and alkali resistance, poor resistance to aromatic hydrocarbons, chlorinated hydrocarbons and solvents such as ketones, esters and alcohols. Temperature range: about -30℃～＋80℃. The production of tires close by parts, gaskets, shockproof products, as well as wear-resistant, high-strength and oil-resistant rubber products.
13. Acrylate rubber (ACM\AEM) It is a polymer of ethyl acrylate or butyl acrylate. It is characterized by both good heat and oil resistance, stable performance in lubricants containing sulfur, phosphorus and chlorine additives. It is also resistant to aging, oxygen and ozone, ultraviolet light, and has excellent airtightness. Disadvantages are poor cold resistance, not resistant to water, not resistant to steam and organic and inorganic acids and alkalis. It swells badly within water-soluble solutions such as methanol, ethylene glycol and ketone esters. Also poor elasticity and abrasion resistance, poor electrical insulation, poor processing performance. Use temperature range: about -25℃ ～＋180℃. Can be used to manufacture oil, heat, aging-resistant products, such as seals, hoses, chemical lining.
14. Chlorosulfonated polyethylene rubber (CSM) It is polyethylene by chlorination and sulfonation treatment, the elastic polymer. Excellent resistance to ozone immediate aging, weather resistance is better than other rubber. Flame retardant, heat resistance, solvent resistance and resistance to most chemicals and acid and alkali resistance is good. Electric insulation is still good, abrasion resistance is similar to styrene butadiene rubber. The disadvantage is that the tear resistance is poor, and the processing performance is not good. Temperature range: about -20℃～+120℃. Can be used as a sealing material on the ozone generator, the manufacture of oil-resistant seals, wire and cable wraps, as well as oil-resistant rubber products and chemical lining.
15. Chlorinated ether rubber (CO\ECO) by epichlorohydrin homopolymerization or by epichlorohydrin and ethylene oxide **** polymer. Characterized by resistance to aliphatic hydrocarbons and chlorinated hydrocarbon solvents, alkali resistance, water resistance, aging resistance is very good, ozone resistance, weathering tight to the heat, high airtightness. Disadvantages are low strength, poor elasticity, and poor electrical insulation. Temperature range: about -40℃～＋140℃. Can be used as hoses, seals, film and container lining, oil tanks, rubber rollers, manufacturing oil seals, water seals and so on.
16. Chlorinated polyethylene rubber (CM or CPE) is made of polyethylene through the chlorine substitution reaction with an elastic polymer. Performance and chlorosulfonated polyethylene rubber close to its characteristics are good fluidity, easy to process; excellent weather resistance, ozone resistance and corona resistance, heat resistance, acid and alkali resistance, good oil resistance. Disadvantages are poor elasticity, compression deformation, lower electrical insulation. Use of temperature range: about -20 ℃ ～ ＋120 ℃. Wire and cable sheaths, hoses, tapes, rollers, chemical lining, etc..