Adhesive rubber water stop without isolation film, and preparation method thereof

Abstract

The invention discloses an adhesive rubber water stop without isolation film, and a preparation method thereof. The adhesive rubber water stop without isolation film comprises a rubber water stop body, a self-adhesive glue layer and a concrete loving anti-adhesion coating, wherein the rubber water stop body, the self-adhesive glue layer and the concrete loving anti-adhesion coating are arranged insequence in a stacking manner. The self-adhesive glue layer comprises the following gradients, by mass part, of styrene-series thermoplastic elastomer compositions, tackifiers, plasticizers, antioxidants, ultraviolet light screening agents, couplers and white carbon black. The concrete loving anti-adhesion coating comprises the gradients, by mass part, of concrete loving lotion, filler, water, light stabilizers, dispersing agents, antifoaming agents, concrete loving couplers and titanium dioxide. The adhesive rubber water stop without isolation film is free of isolation film, is free of sandcovering operation, and is easier and more convenient in construction operation, and the construction efficiency is greatly improved; and at the same time, it can be avoided that the self-adhesive glue layer makes too much contact with the air, the situation that the self-adhesive glue layer is directly exposed to the blazing sun can be further avoided, the self-adhesive glue layer and the rubberwater stop are bonded more solid, and a better waterproof effect is achieved.

Description

technical field [0001] The invention relates to a waterproof material for construction, in particular to a peel-off self-adhesive rubber waterstop and a preparation method thereof. Background technique [0002] At present, the rubber waterstop is made of natural rubber or various synthetic rubber as the main raw material, mixed with various additives and fillers, and is made through plasticization, mixing, calendering and vulcanization. It is mainly used for concrete casting When it is installed in the construction joints and deformation joints and the foundation projects integrated with the concrete structure, such as underground facilities, tunnel culverts, water aqueducts, dams, liquid storage structures, etc. The rubber waterstop is different from the rigid steel plate waterstop. The rubber waterstop has high elasticity, and the shrinkage cracks formed between it and the concrete are small. Effectively prevent water leakage and water seepage in building structures. [...

AI Technical Summary

Problems solved by technology

In order to prevent the self-adhesive layer from being polluted and failing, it is necessary to do anti-adhesive treatment on the self-adhesive layer. Generally, an isolation film is attached to the self-adhesive layer to achieve an anti-adhesive effect. For example, on the self-adhesive layer Adhering to PET isolation film, release film, release paper, etc., the isolation film needs to be removed before construction, which is more troublesome and reduces installation efficiency

At the same time, once the anti-adhesive material is left or the self-adhesive is peeled off during the removal process, defect points will be formed and a weak boundary layer will be formed, which will reduce the bonding reliability and eventually lead to water seepage and water channeling

[0004] In particular, it should be noted that after the isolation film is torn off, the problem of unreliable bonding will occur when the existing self-adhesive layer is directly bonded to the concrete. Therefore, it is necessary to tear the isolation film in advance during the construction project, and then Sprinkle a layer of gravel on the surface of the self-adhesive, the gravel will be firmly bonded on the surface of the self-adhesive layer, at the same time, poured on the self-adhesive surface of the rubber waterstop and the cured concrete will be separated from the gravel To achieve an excellent bonding effect, it is equivalent to the indirect bonding of concrete to the self-adhesive layer through the gravel to realize the waterproof construction operation of the rubber waterstop, based on preventing the oxidation of the self-adhesive layer after long-term exposure to air, and It is difficult to transport the rubber waterstop after sand covering, etc. It is often to transport the rubber waterstop to the construction site in advance, then tear off the isolation film, and directly cover the sand on the surface of the self-adhesive layer at the construction site. Like this, can bring great inconvenience to construction operation

[0005] Furthermore, in the sand covering operation, due to various construction reasons, the self-adhesive layer may be in contact with the air for a long time, and even the sun will be exposed to the self-adhesive layer for a long time. Small molecular substances in rubber waterstops such as sulfur, accelerators and plasticizers will migrate into the self-adhesive layer, changing the composition ratio of the pressure-sensitive adhesive, resulting in a decrease in the bonding strength between the pressure-sensitive adhesive and rubber. Even loss of viscosity, and the self-adhesive layer itself will also have oxidation problems, and the viscosity will drop. In this way, when the waterstop is deformed under load, it is easy to cause separation between the self-adhesive layer and the rubber waterstop, making the waterstop The hose loses its waterproof effect

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