Degradable sealing grease for shield tail of tunnel shield tunneling machine and preparation method of sealing grease
A technology of shield tail sealing and tunnel shielding, which is applied in the petroleum industry, lubricating compositions, etc., can solve the problems of direct waterproofing, lubricity and mechanical stability, etc., and achieve good lubricity, good waterproof effect, and excellent lubricity Effect
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[0021] Example 1
[0022] A degradable tunnel shield tunneling machine shield tail sealing grease, which is composed of the following mass fraction components: 18% compound modified castor oil as base oil, 48% auxiliary filler, 15% tackifier, 11 % Compound calcium sulfonate grease, 5% natural plant fiber, 3% water-absorbing particles.
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[0023] Example 2
[0024] A degradable tunnel shield tunneling machine shield tail sealing grease, which is composed of the following mass fraction components: 20% polyol grease as base oil, 32% auxiliary filler, 18% tackifier, 11% Lithium grease, 5% degradable synthetic fiber, 4% water-absorbing particles.
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[0025] Example 3
[0026] A degradable tunnel shield tunneling machine shield tail sealing grease, which is composed of the following components in mass fraction: 25% modified castor oil, polyol fat mixture as base oil, 33% auxiliary filler, 20% Tackifier, 14% calcium sulfonate complex grease, lithium-based grease mixture, 3% natural plant fiber, 5% water-absorbing particles.
[0027] The preparation method is as follows: first add modified castor oil and polyol grease, complex calcium sulfonate grease, lithium-based grease, and tackifier into a kneader at room temperature for kneading for 60-90 minutes while heating and heating to 60- 90°C. Subsequently, natural plant fibers and water-absorbing particles are added and kneading is continued for 60 minutes. Finally, the auxiliary filler is added and the temperature is lowered to 40-60°C for kneading for 10-20 minutes, followed by cooling and grinding to obtain a degradable tunnel shield tunneling machine shield tail sealing grease...
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