Chlorinated polyethylene composition containing black phosphorus (alkene) and application of composition

Abstract

The invention discloses a chlorinated polyethylene composition containing black phosphorus (alkene) and application of the composition. The chlorinated polyethylene composition comprises the followingraw materials in parts by weight: 10-90 parts of chlorinated polyethylene; 0.1 to 20 parts of black phosphorus (alkene); 0.1 to 20 parts of a plasticizer; 0.1 to 10 parts of a stabilizing agent; 0-15parts of a cross-linking agent; 0-20 parts of a flame retardant; and 0.01-30 parts of filler. The chlorinated polyethylene composition containing black phosphorus (alkene) has a good flame retardanteffect, and can prevent flame combustion and inhibit smoldering; and the mechanical property of the composition is stronger than that of a chlorinated polyethylene matrix material. The chlorinated polyethylene composition containing black phosphorus (alkene) can be added into PVC, CPVC, ABS, PS, PA and other plastics to improve the impact property and flame retardancy, and can also be used in NBR,EPDM, natural rubber and other materials.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a black phosphorus (ene)-containing chlorinated polyethylene composition with excellent processing stability, mechanical properties and flame retardancy. Background technique [0002] Chlorinated polyethylene (CPE) is a new type of polymer material prepared by replacing the chlorine of hydrogen atoms on the main chain of polyethylene. Usually, the chlorine content of chlorinated polyethylene is between that of polyethylene and polyvinyl chloride (PVC). , the chlorine content is 57%), and the typical chlorine content is kept between 22-45% to make it elastic. Because of its excellent oil resistance, weather resistance, chemical corrosion resistance, electrical insulation and flame retardancy, chlorinated polyethylene is widely used in wire and cable, waterproof membranes, tape hoses, and as an impact modifier. In plastic and rubber products. [0003] Regardless of whether it is ...

AI Technical Summary

Problems solved by technology

[0003] Regardless of whether it is plastic-type chlorinated polyethylene (PE-C) or rubber-type chlorinated polyethylene (CM), the polarity of the main chain molecules increases due to the substitution of chlorine, which makes the processing fluidity of chlorinated polyethylene poor, and This leads to a series of other technical difficulties

[0004] 1. Flame retardancy problem: the limiting oxygen index of plastic chlorinated polyethylene is 26% (when the chlorine content is 42%), and it can reach 35% when 5% antimony trioxide is added for synergistic flame retardancy; at the same time, 40% hydrogen oxide is added The limiting oxygen index for aluminum is 38%

In addition, the addition of a large amount of flame retardants leads to a significant reduction in the processing fluidity and mechanical properties of chlorinated polyethylene, resulting in the inability to prepare qualified products

So far, the most commonly used effective flame retardant to improve the flame retardancy of chlorinated polyethylene is antimony trioxide. technical challenge

CPE is used as an impact modifier and weld strength modifier in PVC door and window profiles and pipes. Without the combination of antimony trioxide synergistic flame retardant, the addition of CPE will reduce the flame retardancy of PVC (limiting oxygen index 36%)

[0005] 2. Processing fluidity problem: the Mooney viscosity of rubber-type chlorinated polyethylene is generally 40-130, and the processing fluidity is not good, so a large amount of plasticizer is added to improve the fluidity

Most of the plasticizers currently used are small molecule plasticizers, which are volatile and flammable, which reduces the flame retardancy of the product

The precipitation after processing into products also leads to odor pollution and the decline of various properties

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