Sealing daub and preparation thereof
A cement, rubber-based technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of low strength, narrow operating temperature range, darkening, etc., and achieve good sealing performance, good sealing effect, and insect prevention.
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example 1
[0013] Mix 100 parts of chloroprene rubber, 20 parts of petroleum resin C5, 30 parts of 3000-mesh barium sulfate, 10 parts of naphthenic oil, and 5 parts of titanium dioxide on a vacuum kneader and vacuumize for 30 minutes, and the temperature naturally rises to 160 ° C . The mixed rubber material is extruded and molded to obtain a white sealing cement product. After testing, its adhesive performance is 58N, the penetration is 68mm, and the penetration after high temperature hardening is 73. Elasticity test, viscosity test, high temperature shape Both the stability test and the alkali resistance test have passed.
example 2
[0015] Mix 100 parts of butadiene rubber, 20 parts of petroleum resin C5, 30 parts of 4000-mesh barium sulfate, 3 parts of big red powder, and 10 parts of naphthenic oil on a vacuum kneader and vacuumize for 45 minutes, and the temperature naturally rises to 150 ℃. The mixed rubber material is extruded and molded to obtain a red sealing cement product. After testing, the adhesion performance is 58N, the penetration is 72mm, and the penetration after high temperature hardening is 75. Elasticity test, viscosity test, high temperature shape Both the stability test and the alkali resistance test have passed.
example 3
[0017] 100 parts of natural rubber, 15 parts of petroleum resin C5, and 35 parts of 4000 mesh barium sulfate were mixed on a vacuum kneader and vacuumized for 50 minutes, and the temperature naturally rose to 80°C. The mixed rubber material is extruded and molded to obtain a white sealing cement product. After testing, its adhesion performance is 65N, the penetration is 76mm, and the penetration after high temperature hardening is 78. Elasticity test, viscosity test, high temperature The shape stability test and the alkali resistance test all passed.
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