Organosilicon joint sealing material with low cost and high performance

Abstract

The invention provides organosilicon joint sealing materials with low cost and high performance. A product prepared from the organosilicon joint sealing materials comprises the following components in proportion by weight: 100 alpha, omega-dicarboxylic dimethyl polysiloxane, 5 to 70 filler reinforcement agents, 0.5 to 12 crosslinking agents, 1 to 5 o coupling agents, 41 to 80 dimethyl polysiloxane, 1 to 8 deep-layer crosslinking accelerant and 6 to 14 tackifier, wherein the alpha, omega-dicarboxylic dimethyl polysiloxane and the filler reinforcement agents are added into a vacuum kneader, dehydrated and mixed to obtain base materials, the base materials are moved in a high-speed dispersator, and stirred and mixed with other components in a high-speed mode, and finally the crosslinking accelerants are added to carry out chemical reaction to obtain the joint sealing materials. Various raw materials used by the invention can be bought in the market; thereby the invention has low manufacturing cost, high performance in various aspects, low modulus, high extension percentage, normal temperature crosslinking, good bonding effect and sealing effect on cement and earth, good elastic restitution capability, embedding resistance, weather resistance and long service life.

Description

technical field

[0001] The invention relates to a joint filler for highway cement concrete pavement, in particular to a low modulus, high elongation, normal temperature cross-linking and long-life organic silicon joint filler. Background technique

[0002] Highway cement concrete pavement has many advantages such as high strength, water damage resistance, stable performance, low daily maintenance cost, long service life, saving driving fuel consumption, etc., and has broad development and application prospects. In order to adapt to the expansion and deflection caused by temperature changes and repeated vehicle loads, the road cement concrete pavement needs to be equipped with joints, including expansion joints (expansion joints, contraction joints) and construction joints. The joint is the weak link of the cement concrete pavement: ground water will infiltrate into the pavement base under the cement concrete pavement from the joint, resulting in a decrease in the strength of...

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