Preparation method for cationic silicone/acrylic emulsion alkali resistant seal primer

Abstract

The invention relates to a preparation method for a cationic silicone/acrylic emulsion alkali resistant seal primer. The basic formula of the seal primer is as follows: 30% to 50% of emulsion, 4% to 8% of titanium dioxide, 5% to 12% of ground limestone, 5% to 10% of kaolin, 1% to 3% of talcum powder, 2% to 6% of coalescing agent, 1% to 5% of propylene glycol, 0.5% to 3% of thickening rheological agent, 2% to 5% of assistant and 20% to 35% of deionized water. The seal primer has the advantages of strong permeability, excellent weather and water resistance, good adhesion with substrate and paint, good self cleanness and environmental friendliness, excellent sealing performance, excellent alkali resistance and higher alkali and salting-out resisting performance. Therefore, the seal primer is suitable for being coated on the surfaces of external walls, internal walls, cement walls, concrete, gypsum boards, asbestos plates and the like.

Description

technical field [0001] The invention relates to a preparation method of an architectural coating primer, in particular to a cationic silicon-acrylic emulsion anti-alkali sealing primer suitable for various interior and exterior wall coatings. Background technique [0002] The base material of building exterior walls is mostly cement mortar or concrete surface, which is characterized by porous and strong alkalinity. Among them, the porous structure makes the water absorption strong, which makes the surface of the decorative coating not smooth enough, which easily causes the coating film to wrinkle, and may cause the coating film to dry too fast and cause the topcoat to crack; strong alkalinity will lead to chemical degradation of the resin in the coating, Accelerate the aging process of the coating film, reduce the service life of the coating, and at the same time cause the pigment particles to be exposed, lose the protection of the resin and cause fading. Based on the chara...

AI Technical Summary

Problems solved by technology

When it is used on some cement walls that are not completely dry, during the slow drying process of the wall, the alkali and soluble salts in the cement will seep out from the capillary of the cement in the form of an aqueous solution through the coating, and when they meet the air, C0 2 Insoluble carbonate is formed. This white substance is extremely difficult to completely remove. It will not only cause problems such as discoloration and peeling of the coating, but also part of the white substance can be washed down by rainwater to form tear marks, which seriously affects the coating film. decorative and protective properties