Answer:
(1) According to my understanding, at present there are no technical difficulties for major PU manufacturing companies in China to produce water-based liquid polyacrylamide. However, no factory has been producing and selling it, for the following reasons: the cost is too high and the market acceptance is low. Moreover, the so-called water-based liquid on the market actually falls into two categories:
- With emulsified asphalt mixed with high-molecular water-based resin(EVAOr acrylic resin)Black water-soluble waterproof adhesive made from the main ingredient.
- Color-resistant waterproof adhesive made from water-based acrylic resin mixed with various pigments, fillers or additives.
(二) With conventional dual-fluid type oil-based polyacrylamide(Poly Urethane)The advantages and disadvantages of these are as follows: Advantages:
- Easy and quick construction
- Bare floors do not need to be completely dry. (As long as there is no water accumulation)It can also be used for construction.Disadvantages:
- On the vertical surface, the construction could not achieve the standard thickness.
- The film is applied from the top down, so multiple layers are required.(The amount of paint applied should not exceed0.5mm厚)Otherwise, it will not be fully cured, which will affect the waterproof effect.
- Long-term immersion in water(Especially the foam cement on the top.)It is prone to hydrolysis phenomena such as peeling and cracking.
- Direct exposure to the sun will shorten the lifespan of the waterproof coating.
- It has poor elasticity, tear strength, and weather resistance, and is prone to cracking due to structural deformation, resulting in a loss of waterproof effect.
- It is possible to add emulsified petroleum oil at will during mixing, which makes it easy to steal materials and affect the quality.