Preparation method of water-resistant re-dispersible rubber powder

Abstract

The invention discloses a preparation method of water-resistant re-dispersible rubber powder, and belongs to the technical field of preparation in polymer dry powder mortar industry for buildings. According to inorganic filling materials of the re-dispersible rubber powder, cement is used as a water hardening bonding material; after the sintering of the cement and various kinds of stone powder, loose sintering materials are formed and are used for sucking and seeping high-water-resistance polyacrylate; the prepared lemon and soybean are squeezed; an obtained mixture is used as a compounded hydrophobic surfactant. Filter liquid is extracted from soybeans; a small amount of lecithin is contained in the filter liquid, so that the filter liquid can be used as an emulsifier, so vinyls are introduced into the polymers; the crosslinking polymerization is realized so as to improve the stability of the polyacrylate; in addition, lecithin belongs to a nonionic emulsifier; the chemical stabilityis high. The particles of polyacrylate emulsion synthesized under the conditions in the technical scheme has very small particles and can approach the nanoscale; water molecules are difficult to entergaps between the emulsion particles to form water bags through diffusion; the bonding performance and the water-resistant performance of the pressure-sensitive adhesives are improved.

Description

technical field [0001] The invention discloses a preparation method of water-resistant redispersible rubber powder, which belongs to the technical field of preparation of polymer dry powder mortar for construction. Background technique [0002] Redispersible latex powder products are water-soluble redispersible powders, which are divided into ethylene / vinyl acetate copolymers, vinyl acetate / ethylene tertiary carbonate copolymers, acrylic acid copolymers, etc., and powder adhesives made after spray drying , with polyvinyl alcohol as a protective colloid. This kind of powder can quickly redisperse into emulsion after contacting with water. Due to the high bonding ability and unique properties of redispersible latex powder, such as: water resistance, construction and heat insulation, etc., their The scope of application is extremely wide. [0003] The research on redispersible rubber powder began in 1934 with the polyvinyl acetate redispersible latex powder of I.G.Farbenindus...

AI Technical Summary

Problems solved by technology

[0006] The technical problem mainly solved by the present invention is that the dispersion effect of the current redispersible latex powder is poor, and it cannot be used to prepare dry powder architectural coatings, but can only be used as additives such as architectural putty, and the film formed by the redispersion liquid has poor water resistance, and the polymer powder After meeting water and redispersing into emulsion and drying to form a film, due to the existence of water-soluble protective colloid, it will still be dissolved again when it meets water, which makes the surface of the coating film rough. It provides a water-resistant redispersible rubber powder. preparation method