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HCPE is a irregular resultant after depth chlorination with the low molecular weight polyethylene (PE). Generally the quality score of chlorine is bigger than 65%, and it is the main film-forming substances as new generation antiseptic paint. It has the following characteristics.
1, Compared with the CPVC, the chlorine atom's position on the molecular is the non-rule, the association strength between molecules is extremely low, it is the basic non-crystalline state; But for the CPVC resin, average every five vinyl chloride chain belt has connected to the four chlorine atoms, the molecular arrangement was quite still neat, there are a large crystal, therefore, the paint film have a poor adhesion. In addition, The solubility of CPVC resin is poor, and the solid content is low.
2, The solubility is good, and more resins can mix with it.
3, Compared with the CSM, the advantage of HCPE is single-component packaging, it do not use lead oxide, tribasic lead curing agent containing heavy metals. There is no toxicity, and has a broader range of applications.
4, Compared with the chlorinated rubber, HCPE as the base material of protective coatings retains the advantage of chlorinated rubbers, but overcome the shortcomings of. Namely the chlorinated rubbers is on the photochemical reaction and degradation of sensitive chloride because of existing not saturated duplet bond.
5, Lower price than epichlorohydrin resins, and water resistance is better than the chlorine vinegar resin.
6, Compared with ordinary HCPE, the viscosity is low, take the Tu-4 coating cup, the quality score as the toluene solution 20%, under the room temperature determines, is not bigger than 50S; Ordinary HCPE viscosity generally above 50S.
7, May be made into high-solids coatings, reduces the coating cost greatly, and the coating has a fast-drying nature, and has a better compatibility with other resins. Low-viscosity grade HCPE film features: The coating maked by HCPE has a high solid content. There is no double bond in the molecular chain of
HCPE. Thus it has excellent resistance to atmospheric aging, water, sea water, brine, chemical atmosphere, acid, alkali, salt, etc. It have so excellent corrosion resistance properties; Construction convenient, one-component packaging, operates the barrel then to use...May under - 15~50° C the environment constructs; Film drying quickly; The table dry is less than 10min. Spraying, brushing, dipping are all OK. Coating non-toxic, and has anti-mildew, fire-retardant properties.
Application of HCPE(paint grade) resin:
The HCPE resin can be made into various special etch primer, anticorrosive finish paint, anticorrosive varnish, anticorrosive lacquer enamel, anticorrosion paint, road marking glisten paint, anticorrosive art paint and anticorrosive flame retardant paint etc.
And is widely used for the antisepsis, decoration and protection about long-term withstand chemical mediator corrosion just like acid, base, oil, salt, and long-term withstand the sunlight, wind and rain erosion just like decorating and maintenance of those vessel, auto, railway, bridge, various equipments, oil facilities, chemical, electric power, metallurgy, mine, civil and industrial architecture, containers, pipes, workhouse with steel structure, door and window, underground engineering, salt area, environmental protection project etc.
Thermal decomposition temperature
(in 8% dichloroethame solution)