Environment-friendly high-adhesion building primer and preparation method thereof

Abstract

The invention provides environment-friendly high-adhesion building primer and a preparation method thereof. The primer comprises a polymer emulsion, a potassium silicate solution, a pH regulator, a freeze-thaw stabilizer, a dispersing agent, a wetting agent, a defoaming agent, pigment, a thickening agent, a coalescing agent, a base material wetting agent and water. The potassium silicate solutionand the cement in the base material belong to silicate inorganic substances and have very good compatibility, and the molecular-level potassium silicate solution can easily wet and permeate into capillary holes of the base material under low surface tension, so that the alkali efflorescence resistance of the primer is improved, the base material is reinforced, and the bonding strength of the basematerial and the primer is improved. Besides, the primer is excellent in performance, all raw materials adopted are environment-friendly and low-odor, harmful substances such as VOC, formaldehyde, heavy metals, APEO and a biocide are not added artificially, the produced product is non-toxic and odorless, and therenewable potassium silicate solution is used as a film forming substance.

Description

technical field [0001] The application relates to the technical field of architectural coatings, in particular to a green and environment-friendly high-adhesion architectural primer and a preparation method thereof. Background technique [0002] With the promulgation and implementation of "GB / T 35602-2017 Green Product Evaluation - Coatings", people pay more attention to the limits of harmful substances such as VOC and formaldehyde in coatings. In terms of exterior wall decoration, high-rise buildings and exterior wall insulation severely restrict the use of heavy decorative materials such as stone and wall bricks. Decorative effects such as imitation wall bricks and imitation granite are gradually recognized by the majority of owners. When decorative materials such as imitation wall bricks and imitation granite are used for exterior wall decoration, a primer needs to be applied on the surface of the base layer of the exterior wall, and the primer needs to be divided into mu...

AI Technical Summary

Problems solved by technology

At present, the building exterior wall primers are all water-based paints produced by polymer emulsions, which have the following disadvantages: 1. Water-based paints have a large surface tension and poor wettability to the capillary pores of the base; 2. The particle size of the emulsion is generally between Between 100-200nm, the particle size is relatively thick, even larger than the diameter of some capillary pores, so it cannot penetrate effectively; 3. The polymer emulsion is a thermoplastic resin, the glass transition temperature is generally 15-30 °C, and the wall temperature in summer is as high as 50-60 °C. ℃, the strength of the paint film will be greatly reduced, and it will be easily torn by textured paper, which will affect the decorative effect and waterproof and alkali resistance

Patent CN106700814A is a kind of water-based high-adhesion crack primer prepared by epoxy modified sealing emulsion, adding additives and pigments and fillers, but the VOC content of the primer is high, and CMIT / MIT (3:1 ) biocides, which obviously cannot meet the technical requirements for green products of water-based architectural coatings in "GB / T 35602-2017 Green Product Evaluation - Coatings"

Images