Method for preparing self-adhesion rubber asphalt waterproof roll tearing-free film

Abstract

The invention discloses a method for preparing a self-adhesion rubber asphalt waterproof roll tearing-free film, and relates to a method for preparing a building thin film. The method comprises the following steps of: adding 100 parts of anacardol (98 percent), 70-95 parts of formalin (37 percent) and 2,775-4,000 parts of polyvinyl alcohol aqueous solution (5 percent) into a reactor; then adding the residual 95-120 parts of formalin (37 percent) for a continuous reaction to obtain film stoste; and neutralizing the film stoste until the pH is 7.0, diluting the film stoste until the concentration of the film stoste is 5 percent, coating the film stoste on the surface of the just formed self-adhesion rubber asphalt waterproof roll by a roller coating method, and under the common action of the temperature of the roll and sweeping of a fan, quickly drying the film stoste on the surface of the roll to form a film. The film in the invention is self-dissolved and decomposed into alkaline slurry of concrete, and the bonding strength between the solidified concrete and the roll cannot be influenced.

Description

technical field [0001] The invention relates to a method for preparing a building film, in particular to a method for preparing a tear-free film for self-adhesive rubber asphalt waterproof rolls. Background technique [0002] In the past 20 years, my country's building waterproof material industry has made great progress, and the product structure has also been greatly improved. According to the composition of waterproof materials, it can be divided into modified asphalt waterproof membranes, polymer modified waterproof membranes and synthetic polymer waterproof membranes. There are three types of coils. Among them, the output of asphalt waterproof membrane is the largest, and its share in the waterproof material market is rising rapidly. With the increase of permanent buildings and the commercialization of residential buildings, people have higher and higher requirements for building waterproofing, and the accelerated promotion of high-grade waterproof materials has become ...

AI Technical Summary

Problems solved by technology

[0009] However, the outermost layer of the self-adhesive rubber asphalt waterproofing membrane, such as polyethylene film and aluminum foil, must be torn off during construction. If the construction environment is simple, this layer of surface isolation film can be used when pouring concrete It can be torn off before without affecting the waterproof performance of the waterproof membrane, but in buildings with complex structures, it is necessary to bind the steel bars after pre-laying the waterproof membrane, which will cause a small local space and is not conducive to tearing the membrane Operation, this will cause an isolation layer between the waterproof membrane and the concrete, so that the bond between the two will not be strong, there will be gaps, and water will appear, and the waterproof membrane will not be able to play a waterproof role.

Of course, this layer of isolation film cannot be torn off immediately after the coil is laid, because there will be people walking on the coil during the process of binding the steel bars, so that the surface of the coil will absorb a lot of dust. The limitation of its own bonding mechanism makes the bonding performance of the coil worse, the more dust is accumulated, and the longer the storage time, the more obvious this phenomenon is