Water-based floor alkali-resistant sealing primer

Abstract

The invention provides a water-based floor alkali-resistant sealing primer which is prepared by mixing the following components in percentage by weight: 70-80% of organosilicon-acrylate copolymer emulsion, 1-10% of silicasol, 10-18% of water, 0.1-0.3% of mineral oil defoaming agent, 0.1-0.3% of organosilicon defoaming agent, 1-2.4% of ethylene glycol monobutyl ether, 1-2.4% of dipropylene glycol monobutyl ether, 0.1-0.3% of wetting agent and 0.1-0.4% of preservative. The invention has the advantages of excellent alkali resistance, excellent water resistance, excellent water resistance, excellent salting-out resistance, excellent sealability, strong adhesive force, high hardness, favorable film-forming property, no cracking of thick coating, and no bubble.

Description

technical field [0001] The invention relates to the field of floor paint, in particular to a water-based anti-alkali sealing primer for the floor. Background technique [0002] Alkali-resistant sealing primer has the functions of sealing, blocking, strengthening, stabilizing, bonding and transition, and the painting of primer has become an indispensable process in the painting process. At present, most of the alkali-resistant sealing primers (such as epoxy floor primers) used for floors are organic solvent-based coatings, which have defects in water permeability, safety and environmental protection. This kind of coating forms a dense film. If the moisture content of the floor substrate is too high, water vapor cannot be emitted through the coating film, and the coating is prone to foaming. In addition, volatile organic compounds (VOC, including formaldehyde, ammonia, and ethyl alcohol) in organic solvent-based coatings Diols, esters, etc.) content is about 50%, which will ...

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Problems solved by technology

After the former is solidified into a film, the coating is relatively dense and has poor air permeability. It is prone to blistering and cracking due to water pressure on the thick coating on the concave surface of the floor, and its storage is poor. If it is not used up within the applicable period, it cannot be reused , resulting in waste; the latter has a low solid content and insufficient flexibility. After film formation, it often cracks due to the increase in the bonding stress of the internal emulsion particles to the substrate, and the continuous phase cannot be formed between the over-diluted emulsions, so the seepage is too fast, affecting Sealing effect, resulting in poor alkali resistance, water resistance and salt precipitation resistance

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