Preparation method of polymer adhesive for asphalt concrete

Abstract

The invention discloses a preparation method of a polymer adhesive for asphalt concrete. According to the preparation method, talcum powder is coated with polytrifluorochloroethylene having good stability and good light transmission, so the talcum powder is not easy to agglomerate, has good compatibility in interfaces of other raw materials, shows good dispersity, and improves the cohesiveness of the polymer adhesive ; after the polymer adhesive is cured, an adhesive layer is high in strength, high in toughness, good in yellowing resistance and strong in adhesive force, and has very excellent wear resistance, weather resistance, aging resistance and construction performance; and the talcum powder pretreated by acetic acid is ground by using grinding and screening equipment, and then the powder obtained by grinding is filtered twice, so the prepared talcum powder is small in particle size and is easily coated by polytrifluorochloroethylene, and meanwhile, and the coated talcum powder is easily dispersed in other raw materials, which enables the performance of the polymer adhesive for the asphalt concrete to be further improved.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a preparation method of a polymer adhesive used in asphalt concrete. Background technique [0002] After the asphalt concrete has been used for a long time, it is prone to cracking due to the volatilization of moisture contained in it. The current way is to often sprinkle water on the surface of asphalt concrete for maintenance or repair. But these methods are all cumbersome, and the operation is not very convenient. Adhesives can be added to concrete to enhance the adhesion between concrete, which can effectively prevent concrete cracking. [0003] The patent application number CN201210327391.9 discloses a concrete adhesive. In parts by weight, it consists of the following materials: epoxy resin: 50-80, acetone: 10-20, ethylenediamine: 5-8, dibutyl phthalate: 10-20, quartz sand: 50-80 , cement: 40~60, imide: 20~ [0004] 40. Water: 100-200. The concrete adhesive has the advantages...

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Problems solved by technology

[0005] In order to overcome the above-mentioned technical problems, the object of the present invention is to provide a kind of preparation method of the polymer adhesive used for asphalt concrete: by soaking talcum powder in the acetic acid solution, carry out suction filtration after 1-2h, filter cake Dry in a vacuum oven to obtain acetic acid pretreated talc powder, then grind the acetic acid pretreated talc powder into powder through grinding and screening equipment to obtain ultra-fine talc powder, add ultra-fine talc powder and coupling agent to mix at high speed In the machine, after mixing evenly, the material is discharged to obtain a pretreated ultrafine talc powder. Using radio frequency plasma discharge, the surface of the pretreated ultrafine talc powder is polymerized and coated with chlorotrifluoroethylene monomer to obtain a modified talc. powder, then polyether polyol, diphenylmethane diisocyanate, plasticizer, modified talcum powder and kaolin are put into the mixing tank, after stirring evenly, dehydration treatment, then add plasticizer and diphenylmethane diisocyanate to stir, Add water to the mixing tank, stir evenly to make a gel, and obtain the polymer adhesive for asphalt concrete, which solves the problem of low strength, not easy to wear, weather resistance and aging resistance of the existing concrete adhesive, making the concrete adhesive Short service life and poor construction performance

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