Neoprene rubber，also know as CR rubber, is a polymer of 2-chloro-1,3-butadiene through lotion polymerization, which is a kind of synthetic rubber. It has good physical and mechanical properties, such as high tensile strength, elongation, reversible crystallinity, good adhesion, oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance, and chemical reagent resistance.

The performance characteristics of chloroprene rubber mainly include the following aspects:
Cold resistance and low temperature resistance: By introducing dichlorobutadiene molecular branches into the main chain of ordinary chloroprene rubber, the hardness and tensile stress of chloroprene rubber at low temperatures can be reduced, and its elasticity can be improved, making it still have good cold resistance at extreme low temperatures of -50 to -55 ℃.
Physical and mechanical properties: chloroprene rubber has good physical and mechanical properties, including high tensile strength, elongation, and reversible crystallinity. It has good adhesion, aging resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid and alkali resistance, and chemical reagent resistance.
Aging resistance: Due to the electron withdrawing and shielding effects of chlorine atoms, chloroprene rubber has superior aging resistance, especially in terms of weather aging and ozone aging resistance, second only to ethylene propylene rubber and butyl rubber.
Heat resistance: chloroprene rubber still has certain toughness and elasticity at high temperatures, and can be used for a long time at 80-100 ℃, and can withstand high temperatures of 120-150 ℃ in the short term
Oil resistance and chemical stability: chloroprene rubber has good oil resistance and chemical corrosion resistance. It also has good resistance to chemical reagents and can resist the erosion of various chemical substances
Processing performance: chloroprene rubber can be molded and vulcanized, suitable for various industrial applications. In addition, it also has good compatibility and can be mixed with materials such as natural rubber, butadiene rubber, and styrene butadiene rubber

EPDM rubber, also known as Ethylene Propylene Diene Monomer Rubber, is an important synthetic rubber material. It is formed by copolymerization of ethylene, propylene, and non conjugated dienes, and has a unique chemical structure and excellent physical properties.

Fluororubber, also known as fluororubber, Viton rubber, FKM rubber, is a high-performance synthetic polymer elastomer that is improved through polymer chemical structure modification. Its main feature is the presence of fluorine atoms on the carbon atoms of the main or side chains, which endows fluorine glue with a series of excellent physical and chemical properties due to its unique chemical structure.
Fluororubber is mainly composed of fluorinated olefin compounds, such as fluoroethylene, trifluorochloroethylene, etc., which undergo polymerization reactions to generate polymer chains with strong chemical staViton rubber, also known as fluororubber (FKM/FPM), is a high-performance elastomer characterized by its exceptional properties. It is a synthetic rubber with fluorine atoms in its main or side chains, giving it unique chemical and thermal stability.

Nitrile Butadiene Rubber (NBR) is a copolymer obtained by polymerizing butadiene and acrylonitrile monomers. This material has been widely used in many industrial fields due to its unique chemical structure and physical properties. It’s Lixu rubber’s main and most advantage rubber sealing products range.

The appearance of nitrile rubber is usually a gray white to light yellow block solid with a relative density of 0.95 to 1.0. The strong polar CN groups contained in its molecular structure endow it with excellent oil resistance.
Oil resistance is nitrile rubber’s outstanding advantage comparing with other rubber materials. Its oil resistance is second only to polysulfide rubber and fluororubber.

Styrene butadiene rubber (SBR), also known as polystyrene butadiene copolymer, is an important material in rubber industry. Its chemical structure is formed by copolymerization of styrene and butadiene monomer, usually the content of styrene is about 30%, which gives SBR unique physical and mechanical properties.
Styrene-butadiene rubber (SBR) is a white loose columnar solid with unsaturation, and its unsaturation is lower than that of natural rubber. It is not completely soluble in gasoline, benzene and chloroform, but it has good resistance to polar solvents such as acetone. In addition, styrene-butadiene rubber also has good wear resistance, heat resistance, aging resistance and vulcanization speed, which are even better than natural rubber in some aspects, and are even better in some aspects, such as wear resistance, heat resistance, aging resistance and vulcanization speed. Styrene-butadiene rubber products are widely used in the production of tires, tapes, hoses, wires and cables, medical appliances and various rubber products, and are one of the largest general synthetic rubber varieties, and also one of the earliest rubber varieties to realize industrial production.

key property
1. Unsaturation: providing structural basis for vulcanization and modification of styrene-butadiene rubber. The unsaturated degree of SBR is lower than that of natural rubber, and its vulcanization speed is slower, but its vulcanization flatness is good, its vulcanization reversion resistance is better, its processability is excellent, and its aging resistance is better than that of natural rubber.
2. Wear resistance: The wear resistance of styrene-butadiene rubber is better than that of cis-1,4-polybutadiene rubber, and it is suitable for tire top rubber.
3. Flexibility: Styrene-butadiene rubber is mainly composed of trans butadiene and styrene, which has large steric hindrance, poor molecular flexibility and poor cold resistance.
4. Non-polar: SBR has poor solubility resistance, especially non-polar solvents, such as gasoline and paraffin oil, but it has good resistance to polar solvents.
application area

Styrene-butadiene rubber is mainly divided into emulsion polymerized styrene-butadiene rubber (ESBR) and solution polymerized styrene-butadiene rubber (SSBR). Emulsion polymerized styrene-butadiene rubber is the highest yield styrene-butadiene rubber type at present, and its production technology is relatively mature and its cost is low. Solution polymerized styrene-butadiene rubber is gradually developed in recent years, which has the characteristics of high molecular weight, narrow molecular weight distribution and excellent wet skid resistance.

Styrene-butadiene rubber is widely used in many fields because of its excellent performance. In the tire industry, it is one of the main materials for manufacturing tire tread, sidewall and other parts. In addition, SBR is also used to manufacture conveyor belts, hoses, adhesives, sponge rubber, impregnated fibers and fabrics. In the aspect of high performance modification, SBR can be compounded or modified with other materials to improve its high temperature resistance, low temperature resistance or tear resistance.

As an important synthetic rubber, styrene-butadiene rubber plays an important role in modern industry with its excellent performance and wide application fields. With the continuous progress of science and technology and the continuous improvement of environmental protection requirements, the production and application of styrene-butadiene rubber will continue to develop, bringing more convenience and innovation to mankind.

Characteristics and uses of styrene-butadiene rubber
Styrene-butadiene rubber (SBR), also known as polystyrene-butadiene copolymer, is an important synthetic rubber. It is synthesized by copolymerization of butadiene and styrene, in which the content of styrene is usually around 30%. This unique chemical structure endows SBR with a series of unique physical and chemical properties, which makes it widely used in many fields.

Characteristics of styrene-butadiene rubber
1.  Unsaturation : SBR has a certain degree of unsaturation, which provides a structural basis for its vulcanization and modification. Although its unsaturation is lower than that of natural rubber, its vulcanization speed is slow, its vulcanization flatness is good, and it has good resistance to vulcanization reversion. These characteristics make styrene-butadiene rubber show excellent properties during processing, and its aging resistance is also better than that of natural rubber.
2.  Wear resistance : Styrene-butadiene rubber (SBR) has better wear resistance, which is second only to butadiene rubber (BR), so it is often used as the upper rubber material of tires.
3.  Flexibility and cold resistance : Styrene-butadiene rubber is mainly composed of trans-butadiene and styrene, which has large steric hindrance, resulting in poor molecular flexibility and relatively low cold resistance. However, the flexibility and cold resistance can be improved to some extent by adjusting the content and chain structure of butadiene.
4.  Non-polar : SBR has poor solubility resistance, especially non-polar solvents, such as gasoline and paraffin oil. But it has good resistance to polar solvents, such as acetone. This feature needs special attention during use.
5.  Environmental protection : With the enhancement of environmental awareness, the development of environmentally friendly styrene-butadiene rubber has also made remarkable progress. Styrene-butadiene rubber (SBR) products that meet the requirements of environmental protection can be produced by using environmental protection additives and environmental protection filling oil.

The use of styrene-butadiene rubber
1. Tire manufacturing : Styrene-butadiene rubber is an important material in tire manufacturing, especially suitable for tire tread, sidewall and other parts. Its excellent wear resistance, aging resistance and vulcanization performance make the tire have longer service life and better driving performance.
2.  Conveyor belts and hoses : Styrene-butadiene rubber is also widely used to manufacture rubber products such as conveyor belts and hoses. These products need to bear large tensile and compressive stresses, and the high strength and wear resistance of styrene-butadiene rubber make it an ideal choice.
3.  Adhesives and sponge rubber : Styrene-butadiene rubber can also be used as raw materials for adhesives and sponge rubber. Its good adhesion and foaming properties make these products widely used in many fields.
4.  Impregnating fibers and fabrics : Styrene-butadiene rubber can also be used to impregnate fibers and fabrics to improve their waterproof, oil and acid and alkali resistance. This application makes SBR have a certain market in the field of textile processing.

To sum up, with its unique chemical structure and excellent physical properties, styrene-butadiene rubber has a wide application prospect in many fields, such as tire manufacturing, conveyor belts and hoses, adhesives and sponge rubber, and impregnated fibers and fabrics. With the continuous progress of technology and the improvement of environmental protection requirements, the performance and application scope of styrene-butadiene rubber will continue to expand and improve.

Silicone, abbreviation SI or VMQ, as a high-performance and versatile synthetic material, plays an indispensable role in many fields due to its unique physical and chemical properties.
The following is a detailed description of silicone material:
Silicone rubber, is a high molecular weight elastomer with silicon and oxygen atoms as the main chains and organic groups (such as methyl, vinyl, etc.) connected to the side chains. This material not only has excellent high and low temperature resistance, but also maintains stable physical properties in a wide temperature range of -60 ℃ to 250 ℃. It also exhibits excellent oxidation resistance, ozone resistance, radiation resistance, and electrical insulation performance. These characteristics make silicone an ideal choice for manufacturing various seals, insulators, insulation materials, and electronic components.

It is important to know that silicone also has the characteristic of easy processing and molding, which can easily produce complex and high-precision products through various molding processes such as compression molding, injection molding, extrusion, and rolling. This feature greatly expands the application range of silicone, from daily necessities to high-tech products, from industrial manufacturing to aerospace, silicone has won wide recognition and application for its excellent performance.
Silicone materials can be recycled and reused, and have minimal environmental impact during production and waste disposal, in line with modern green environmental protection concepts. With the advancement of technology, more and more silicone products are adopting bio based or biodegradable materials to further reduce their impact on the environment.
In summary, silicone, as a synthetic material that combines multiple excellent properties, is shining brightly in the fields of materials science and industrial manufacturing with its unique charm and wide application prospects.
Lixu rubber has a wide production capacity to produce silicon rubber products, Our silicon products have passed FDA certificarte, Please check our FDA test report, And we would like to address our physical property test data sheet for silicon 70sh standard materials for your reference !
For more details about our silicone rubber products range, Please contact us immediately !

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