CPE chlorinated polyethylene is a polymer material made from HDPE with no regulations and block chloride. According to different physical properties and uses, chlorinated polyethylene can be divided into two kinds of resin type chlorinated polyethylene (CPE) and elastic body type chlorinated polyethylene (CM). CPE is mainly used for PVC and other general plastics, such as anti impact modifier and engineering plastics such as ABS, CM is a kind of special synthetic rubber, which is a kind of special synthetic rubber, which has good physical properties, heat resistance and ozone aging. The main application and market of CM rubber include the air pipe, the ignition wire coat, the hose and pipe, wire and cable jacket and so on. Is also used in a variety of water pipe, washer, hydraulic hose, oil hose and many other industrial products, etc..
1.CM structure and basic characteristics of the structure of the 1.1 CM CM chlorine atoms in the molecular chain distribution, its structure is as follows: chlorine content in 28%-42%, more for rubber use. 1.2 chlorine content in CM has a certain effect on its performance. 1.3 the characteristics of chlorinated polyethylene 1) CM is a kind of saturated rubber, has excellent heat resistance oxygen aging, ozone aging, acid and alkali, chemical properties. 2) CM oil resistance is excellent, and it has good performance of ASTM 1 oil and ASTM 2, and is equivalent to NBR, and has good resistance to ASTM 3 oil, which is superior to CR and, and is equivalent to CSM. 3) CM contains chlorine element, has excellent flame retardant properties, and has the characteristics of combustion. The appropriate proportion of () three with antimony based flame retardant, chlorinated paraffin and Al (OH) can be obtained with excellent flame retardant properties and low cost. 4) CM is non-toxic, does not contain heavy metals and PAHS, which is completely in line with the requirements of environmental protection. 5) CM has a high filling performance, can be made to meet the requirements of a variety of different properties. The processing performance of CM, Mooney viscosity (ML121 1+4) in 50 - 100 between the various brands available.
2 the application of chlorinated polyethylene 1) CM is suitable for the use of wire and cable, high pressure oil hose, waterproof coiled material, flame retardant, triangle belt, etc., suitable for long-term exposure to ozone and natural climate of the natural conditions of good. 2) CM as a special kind of synthetic rubber can be used in the processing of rubber processing equipment, which can be used in chemical crosslinking and physical crosslinking (irradiation). Compared to 3 cm and other halogen synthetic rubber, excellent physical and mechanical properties, and the mechanical and physical properties of excellent and low price, in accordance with the performance to price ratio called the most economical and practical halogen synthetic rubber. 4) in the NBR/PVC system, CM can achieve similar results, and some properties can be more than NBR/PVC / PVC blend system. In the oil hose, adhesive tape, CM has great application development space.
3. The CM of the system 1 of chlorinated polyethylene is a kind of non self reinforcing rubber, which needs a strong system to achieve good strength. The reinforcing filling system, similar to general purpose rubber, fill strong agent to carbon black and silica based, white carbon black can improve cm tear resistance and consisting of a white system, to improve the adhesion of the cm and the skeleton. CM has high filling, filling system are mainly calcium carbonate, talc, clay, etc.. 2) plasticized softening system ester plasticizer is cm is the most commonly used plasticizer, such as adjacent benzene two formic acid dioctyl phthalate (DOP) and dioctyl adipate (DOA), close to their solubility parameters and cm. The compatibility is good. DOA and DOS can be used to give a good cold resistance of the compound. 3) the stability of the system of CM door heating or in sulfide (non peroxide curing system) will the emergence of hydrogen chloride, so in the formula to use acid effect of stabilizer with suction, such as calcium stearate, barium stearate, tribasic lead sulfate or magnesium oxide. 4) CM CM is a saturated rubber, which can not be used for the general purpose of the ordinary sulfur curing system. At present, the CM curing system is more mature, and the peroxide curing system, the curing speed, good physical properties, compression of permanent deformation. Peroxide does not apply to lower pressure, no mold curing. Peroxide system can be used in the production of adhesive tape, good physical properties, heat resistance, oil resistance. When the system is combined with TAC, TMPTM, TAIC, HVA 2, it can improve the physical and mechanical properties and heat resistance. Because the peroxide is a free radical reaction to produce the crosslinking, some of the acidic filler will affect the free radical generation, therefore, the type of packing is not suitable for use.