What is polysulfide? What is the performance of this product? Below, take a look at some of the content shared by polysulfide glue sales manufacturers!

    Polysulfide generally refers to liquid polysulfide rubber. Liquid polysulfide rubber refers to low molecular weight polysulfide rubber. It's a thick, almost odorless liquid. With oil resistance, solvent resistance, oxygen and ozone resistance, water resistance, high and low temperature resistance and other excellent properties. Stable in neutral medium and room temperature, can be stored for several years, but in acidic medium will occur decomposition. It can be vulcanized at room temperature, with inorganic oxides, peroxides, quinone dioxime, amine compounds as vulcanizing agent.

    Used in aviation, electronics, electrical and other industries as solvent resistance and waterproof sealing materials, can also be used as a rocket fuel adhesive. It can be prepared by condensation of formaldehyde diβ-chloroethanol and sodium tetrasulfide into polymer polysulfide rubber, and then through desulfurization, chain breaking, condensation and other steps.

    Polysulfide rubber is made of saturated carbon-hydrogen bond and sulfur bond combination of polymer compounds, liquid polysulfide rubber is mostly ethylene-formaldehyde disulfide polymer. The results of fuel aging test show that the oil resistance of liquid polysulfide rubber is good. After adding vinylidene chloride acrylonitrile latex, the oil resistance of liquid polysulfide rubber film is obviously improved. Liquid polysulfide rubber, increase the proportion of ethyl, film strength increases, good resilience, oil resistance improved, but easy crystallization.

    When the dosage of dichloropropane was increased to 37%(mol), the tensile strength of the film was 1.5MPa and the elongation was 1500%. The molecular chain of liquid polysulfide rubber contains sulfur atoms, so that the latex has good adhesion to the surface of concrete, and the peeling strength of concrete can reach 58.8N/25mm or more. Polysulfide rubber has good adhesion to various materials and resistance to stress cracking. When the tensile strength of the film is greater than 3MPa, it remains intact for 100h under static pressure of 0.25MPa.

    In addition, liquid polysulfide rubber has good low temperature flexility and atmospheric aging resistance, water resistance, resistance to hydrocarbon solvents and other properties.

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