1. Chlorinated Polyethylene (CPE) is obtained by replacing chlorine atoms with hydrogen atoms on HDPE. CPE is nontoxic, odorless and white powder.

2. The chlorinated polyethylene made from low pressure polyethylene HDPE has better heat resistance and heat aging properties than chlorinated polyethylene made from high pressure polyethylene. Polyethylene, with a density of 0.93 to 0.96g/cm3, an average molecular weight of 5~25, and a melt index of 0.01 to 2.0g/10min polyethylene, is commonly used to produce chlorinated polyethylene. Chlorination degree of chlorinated polyethylene has great influence on its properties.

When the chlorine content is less than 15%, it is plastic; when the chlorine content is between 16 and 24%, it is thermoplastic elastomer; when the chlorine content is between 25 and 48%, it is rubber like elastomer; when the chlorine content is 49 to 58%, it is as a leather like semi elastic hard polymer; when the content of chlorine is high to 73%, it becomes brittle resin. If about 27% of chlorine is introduced in high pressure polyethylene, the crystallization will disappear completely, and about 30% of chlorine is introduced into the low pressure polyethylene with high crystallinity, and the crystallization will disappear completely too.

As rubber elastomers, the chlorine content in CPE is best in the range of 30 to 40%. At present, chlorinated polyethylene rubber is mostly in the range of 25 to 45%. When the content of chlorine increases, the oil resistance, gas permeability and flame retardance will be improved. When the chlorine content decreases, the cold resistance, resilience and compression bending performance are better.
1) CPE is a saturated rubber with excellent heat and oxygen aging, ozone aging, acid and alkali resistance, and excellent chemical properties.

2) CPE’s oil resistant performance is excellent, of which ASTM 1 oil, ASTM 2 oil performance is especially good, and this oil resistance is comparable to NBR; CPE’s oil resistance to ASTM 3 is excellent, superior to CR, and equivalent of CSM.

3) CPE contains chlorine, which has excellent flame retardancy and combustion resistance. The flame retardant material with good flame retardancy and low cost can be obtained by proper proportions of the flame retardant, chlorinated paraffin and Al (OH) 3 three.

4) CPE is non-toxic, does not contain heavy metals and PAHS, and is fully in line with environmental protection requirements.

5) CPE has high filling performance and can produce products that meet various performance requirements. CPE has good processability and ML121 1+4 is available in 50-100 different brands.

3, chlorinated polyethylene can be divided into two types: resin type chlorinated polyethylene (CPE) and elastic type chlorinated polyethylene (CM). It can be used in addition to polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polystyrene (PS), ABS and other resins, or even polyurethane (PU). In the rubber industry, CPE can be used as a high performance, high quality special rubber, and can also be blended with EPR, butyl rubber (IIR), nitrile rubber (NBR), Chlorsulfonated polyethylene (CSM) and other rubber. Mainly used in: wire and cable (coal mine cable, UL and VDE and other standards specified in the wire), hydraulic hose, car hose, tape, rubber plate, PVC section tube modification, magnetic materials, ABS modification and so on.

4, CPE reinforcing agent is mainly carbon black and white carbon black; the filling system mainly includes calcium carbonate, pottery clay and talcum powder. The plasticizers are mainly DOA and DOS; the commonly used stabilizers for CPE vulcanization are mainly sodium hard acid, Magnesium Oxide, barium stearate and three base sulphate sulfate, which are mainly for hydrogen chloride produced during vulcanization.

5. CPE is a saturated rubber. The general sulphur vulcanization system cannot cure it effectively. The curing system is divided into four vulcanization systems: thiourea system, peroxide system, thiazole two azole system and three azole two mercapto amine salt system.