Core-shell pure acrylic emulsion for exterior wall coating as well as preparation method and application thereof

Abstract

The invention discloses a core-shell pure acrylic emulsion for an exterior wall coating as well as a preparation method and application thereof, and belongs to the technical field of building coatings. The core-shell pure acrylic emulsion comprises the following components in parts by mass: 5.07-30 parts of a core monomer, 5.07-30 parts of a shell monomer, 0.6-12 parts of a reactive emulsifier, 0.02-2 parts of a nonionic emulsifier, 0.02-5 parts of an initiator, 0.02-2 parts of a defoaming agent, 0.02-2 parts of a preservative, 0.02-5 parts of a pH neutralizing agent and 45-60 parts of deionized water. The core monomer is a main monomer; the shell monomer comprises 4.93-20 parts of a main monomer, 1-10 parts of a hydrophobic soft monomer, 0.02-2.55 parts of a polar monomer, 0.01-1.25 partsof a room temperature self-crosslinking monomer component A, 0.01-1.25 parts of a room temperature self-crosslinking monomer component B, and 0.02-2.5 parts of a photoinitiator crosslinking agent, wherein the main monomer comprises an acrylic soft monomer and an acrylic hard monomer; and the mass ratio of the room temperature self-crosslinking monomer component A to the room temperature self-crosslinking monomer component B is 2:1. The emulsion provided by the invention has balanced performance on the whole, and improves the comprehensive performance such as film compactness, adhesive force,water resistance, and raindrop imprint resistance on the basis of fully ensuring film formation.

Description

technical field [0001] The invention belongs to the technical field of architectural coatings, and relates to a core-shell pure acrylic emulsion for exterior wall coatings and a preparation method and application thereof. Background technique [0002] my country is a large manufacturing country. With the expansion of the economy, the national outbreak of environmental pollution and severe atmospheric smog has seriously threatened the environment on which the people of the country depend. VOC in coatings and adhesives is the cause of severe atmospheric smog. The chief culprit of smog is the most important cause of smog. Although the current performance of water-based coatings cannot exceed that of traditional solvent-based coatings, it has become the first choice for the development of coatings because of its non-pollution, environmental safety and compliance with national environmental protection policies. Inevitable trend, especially my country promulgated new regulations on ...

AI Technical Summary

Problems solved by technology

[0005] In this project, through the reasonable control of the emulsion structure, the core-shell structure is adopted, and the strong hydrophobic isodecyl acrylate, isodecyl methacrylate, lauryl acrylate, and lauryl methacrylate soft monomers are introduced under moderate crosslinking. At least one, participate in the multi-step seed emulsion copolymerization, design the strong hydrophobic and "soft" monomer as the shell of the emulsion particles, etc. to solve the problems of poor water resistance and poor resistance to rain marks of such products in the current market

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