Company Profile
Weifang Phoenix New Material Co., Ltd
Weifang Phoenix New Material Co., Ltd is a high-tech chemical enterprise integrating research and development,
production, sales and technical services. Headquartered in Weifang, Shandong Province. Its production facilities are
ocated in Weifang Binhai Chemical Industry Park, a state-approved chemical industry park.
Our mission is to be the leading sustainable "one-stop shop" chemical solutions company, providing customers
with innovative, science-led, differentiated products and solutions. To this end, we provide a safe and healthy working
environment for our employees and comply with all local, national and international regulations.
Product Parameters
| PROJECT |
HT-403 |
HT-503 |
HT-603 |
HT-703 |
HT-803 |
HT-903 |
HT-604 |
HT-48 |
HT-45 |
| Chlorine % |
35±2 |
35±2 |
35±2 |
35±2 |
35±2 |
35±2 |
43±2 |
43±2 |
25±2 |
| Sulfur content % |
1.0~1.5 |
1.0~1.5 |
1.0~1.5 |
1.0~1.5 |
1.0~1.5 |
1.0~1.5 |
1.0~1.5 |
1.0~1.5 |
1.0~1.5 |
| Volatile matter % ≤ |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
| Tensile strength MPa ≥ |
25 |
25 |
25 |
25 |
25 |
25 |
- |
- |
- |
| Elongation at break % ≥ |
450 |
450 |
450 |
450 |
450 |
450 |
- |
- |
- |
Mooney viscosity
ML(1+4) 100ºC |
40~50 |
50~60 |
60~70 |
70~80 |
85~95 |
95~110 |
50~70 |
70~90 |
35~45 |
Chlorosulfonated polyethylene (alias: Hypalon) is a special type of rubber made by chlorination and chlorosulfonation of polyethylene. After chlorination and sulfonation, the regularity of the structure of polyethylene is destroyed, and it becomes a chlorosulfonated polyethylene rubber that is soft and elastic at room temperature.
Chlorosulfonated polyethylene is obtained by dissolving polyethylene in carbon tetrachloride, tetrachloroethylene or hexachloroacetylene, using azobisisobutyronitrile as a catalyst or under ultraviolet light, passing a mixture of chlorine and sulfur dioxide or treating it with sulfenyl chloride SO2CI. The brief structure is as follows:
The performance of chlorosulfonated polyethylene rubber depends on the molecular weight of the raw polyethylene and the relative content of chlorine and sulfur. Among them, the molecular weight of polyethylene has a greater impact on the performance of chlorosulfonated polyethylene: if the molecular weight is too low, the finished product has high viscosity and low tensile strength; its physical and mechanical properties increase with the increase of polyethylene molecular weight, but after increasing to a certain limit, the impact on its performance is not obvious. The molecular weight of polyethylene generally used is 2w~10w. Among them, chlorosulfonated polyethylene 20 and 30 use high-pressure polyethylene with low molecular weight of 2w~4w; chlorosulfonated polyethylene 40 and 45 usually use low-pressure polyethylene with molecular weight of 8w~10w.
The introduction of chlorine atoms into the polyethylene molecular chain can eliminate the crystallinity of the molecule while maintaining the excellent properties of polyethylene, and the resulting elastomer is soft and easy to process. The hardness and strength of polymers with a chlorine content of 25%~38% are the smallest. Continuing to increase the chlorine content will increase the hardness and strength of the polymer. Experiments have shown that the most suitable chlorine content is about 27%. When the chlorine content is high, the resulting polymer has better solvent resistance and oil resistance, and the strength at higher temperatures is also relatively large, but the compression permanent deformation and brittleness at low temperatures increase. When the chlorine content is 27%~30%, the polymer has sufficient plasticity and good processing properties.
The role of sulfur dioxide is to combine it with chlorine to form sulfenyl chloride groups in chlorosulfonated polyethylene so that cross-linking can be formed with the help of this group. Therefore, its content has a great influence on the vulcanization properties of the rubber compound. If the content is too high, it is easy to burn. If the sulfur content in this group is calculated, 1.5% is generally appropriate.
Chlorosulfonated polyethylene is a white or milky white flake or granular solid with a relative density of 1.07~1.28. Its solubility parameter δ=8.9, it is easily soluble in aromatic hydrocarbons and chlorinated hydrocarbons; its solubility in ketones, esters, and cyclic ethers is low; it is insoluble in acids, aliphatic hydrocarbons, monohydric alcohols and dihydric alcohols. When chlorosulfonated polyethylene rubber is heated continuously for several hours at 121°C or above, the sulfenyl chloride group will crack, increasing the polymer and its dissolving viscosity, and it is easy to produce early vulcanization during processing.
2 Basic characteristics:
The chemical structure of chlorosulfonated polyethylene is completely saturated. The saturation of the structure gives it many characteristics. Since there is no double bond in the molecular chain, the vulcanization mechanism is different from other rubbers.
Compared with unsaturated rubber, chlorosulfonated polyethylene vulcanizate has the following excellent properties.
1. Excellent anti-ozone performance
Products made from it do not need to add any anti-ozonants.
2. Heat resistance
Chlorosulfonated polyethylene can reach a heat resistance temperature of 150ºC (short time) after being combined with antioxidants. For products used below 120ºC, 2 parts of antioxidant BA (butyraldehyde aniline condensate) should be used; for products above 120ºC, 2 parts of antioxidant BA and 1 part of antioxidant NBC (nickel dibutyl dithiocarbamate) should be used together.
3. Chemical resistance
Chlorosulfonated polyethylene has good chemical resistance.
4. Weather resistance
Chlorosulfonated polyethylene has excellent weather resistance, especially when used with appropriate ultraviolet shielding agents (such as titanium dioxide, carbon black, etc.). Among them, chlorosulfonated polyethylene 40 is the best.
5. Low temperature characteristics
Chlorosulfonated polyethylene has good low temperature resistance, can maintain a certain flexibility at -40ºC, and becomes brittle at -56ºC.
6. Mechanical properties of materials
Chlorosulfonated polyethylene has a strength of more than 20MPa without carbon black reinforcement and can be used to prepare various light-colored products. In addition, its wear resistance is very good, comparable to low-temperature styrene-butadiene rubber.
7. Flame resistance
Since chlorosulfonated polyethylene contains chlorine atoms in its structure, it will not spread flame and is a heat-resistant rubber second only to chloroprene rubber. Chlorosulfonated polyethylene can also be used in combination with various rubbers to improve the ozone resistance and weather resistance of its combined rubber.
In addition, chlorosulfonated polyethylene also has its disadvantages: such as large compression permanent deformation, poor low-temperature elasticity, oil resistance is not as good as nitrile rubber, and the cost is higher than chloroethanol and chlorinated polyethylene.
Three Applications
Chlorosulfonated polyethylene is known for its excellent ozone resistance and weathering resistance, and has excellent oil resistance, chemical resistance and mechanical properties. Therefore, chlorosulfonated polyethylene is widely used and can be used for wire and cable sheathing, cable insulation, hoses, tapes, automotive parts, building waterproofing equipment, tank linings, rubber sheets, anti-corrosion coatings, etc.
1. Building materials One of the main uses of CSM is as an industrial pool, tank, reservoir lining and single-layer roof waterproofing layer. In these uses, CSM is usually used in the form of unvulcanized film and bonded at the construction site. In terms of single-layer roof waterproofing materials, CSM is comparable to EPDM, PVC, modified asphalt, chloroprene rubber, and chlorinated polyethylene. CSM is an excellent roofing material, mainly used in factories that need to resist more oils and chemicals.
2. Cable insulation material CSM is an ideal material for a variety of wire and cable sheaths. It has better heat resistance than chloroprene rubber and has partially replaced chloroprene rubber in some wire and cable applications. Cables insulated with EPDM and CSM protective sheaths can meet the requirements of IEEE (International Institute of Electronics and Electrical Engineers) standards for use in nuclear power plants. PVC and CSM are co-vulcanized to produce rubber with excellent weather resistance or high-temperature creep performance. CSM film and electrolytic iron foil layer can be pressed into electromagnetic shielding film.
3. Automobile Industry CSM is widely used in the automobile industry, mainly for hoses in air conditioners, hydraulic systems, exhaust control, fuel lines and vacuum control system devices. It can also be used as spark plugs and ignition wires, automobile sealing strips, steering wheel primers, etc.
4. Industrial Use CSM is used in industry to manufacture pipes, conveyor belts, seals and other products with special properties. For example, the laminated tube made with CSM as the inner layer has low permeability to fluorocarbon refrigerants and is suitable for refrigerant delivery pipes. When manufacturing CSM-fluororubber laminated tubes, if peroxide is added, the peel strength of the laminated product can be greatly improved. The laminated product is suitable for manufacturing pipes and containers for transporting and storing fuel oil.
5. Coatings Coating glue accounts for about 85% of the CSM consumption in my country. The film-forming structure of the coating made with CSM is saturated and there is no color gene, so the cured coating has excellent resistance to oxidants, ozone, weather aging, UV, nuclear radiation, and excellent acid, alkali, and salt resistance. This coating is widely used in chemical equipment, steel structures, pipelines, storage tanks, plant buildings, urea ammonium nitrate granulation towers, gas tanks, sewage tanks, ethylene fire cabinets, piers, ships and nuclear power plant equipment that are subject to chemical atmosphere and medium corrosion.
6. CSM can be blended and modified with other rubbers. CSM blended with fluororubber can improve the processing performance of the blended rubber. CSM blended with ethylene propylene rubber can improve the physical and mechanical properties and thermophysical characteristics of the vulcanized rubber. Adding CSM and isoprene rubber to EVA polymer can produce slip resistance, wear resistance, and oil resistance. CSM, PVC, and PU are mixed in an extruder and then vulcanized to produce vulcanized rubber with improved oil resistance and ozone resistance.
Product Description
CSM, also known as Chlorosulfonated Polyethylene, is a synthetic rubber produced from chlorosulfonated polyethylene. It has excellent ozone, weathering, and chemical resistance, making it a popular choice for industrial applications such as gaskets, hoses, and conveyor belts. CSM also has good electrical insulation properties and can withstand high temperatures. In addition, it is flame retardant, low smoke, and low toxicity, making it a safe choice for the transportation industry. Due to its high tensile strength and durability, CSM is often used in the production of industrial hoses, gaskets, and seals. CSM is also used in the automotive industry for the production of timing belts, fuel hoses, and other parts that require resistance to oils and fuels. In addition, due to its excellent weathering and electrical insulation properties, CSM is used in the production of roofing membranes and cables in the construction industry.
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