Lyophobic high-hardness water resistant acrylic ester emulsion and preparation method thereof

Abstract

The invention discloses lyophobic high-hardness water resistant acrylic ester emulsion and a preparation method thereof, and belongs to the field of acrylic ester emulsion. The emulsion is prepared from the following raw materials in parts by mass: 80 to 120 parts of water, 10 to 30 parts of methyl methacrylate, 20 to 40 parts of styrene, 0 to 30 parts of iso-octyl acrylate, 2 to 10 parts of functional monomers, 0 to 2 parts of crosslinking monomers, 2 to 10 parts of protection glue, 2 to 6 parts of emulsifying agents, 1 to 5 parts of initiating agents and 0 to 3 parts of oxidation-reduction agents. The lyophobic high-hardness water resistant acrylic ester emulsion is prepared by a warming self-reaction method; the whole reaction is performed at the temperature of 25 to 95 DEG C, so that the whole reaction system can be performed in relative mild environment; the reaction stability is ensured; meanwhile, the whole reaction is performed in a reaction kettle; the preparation can be realized through heating and stirring; the processing work procedures are very simple; the processing cost of the acrylic ester emulsion is greatly reduced.

Description

technical field [0001] The invention relates to an acrylate emulsion, in particular to a hydrophobic, high-hardness, and water-resistant acrylate emulsion and a preparation method thereof, belonging to the field of acrylate emulsions. Background technique [0002] Acrylate emulsion, as the emulsion commonly used in water-based resins in the world, is especially widely used in real stone paint. Traditional acrylate emulsions have high hardness and contradictory water resistance, hydrophobicity and water resistance. The main reason is that acrylate emulsions are affected by their TG. Low TG acrylate emulsions have good film-forming effects and high compactness, which will make them excellent. Excellent water whitening resistance, and because the acrylate emulsion has the characteristics of hot stickiness and cold brittleness, the acrylate emulsion will become sticky in a high temperature environment. [0003] In order to solve this problem in the prior art, the method of incr...

AI Technical Summary

Problems solved by technology

However, as the surface hardness of the polymer particles increases, the rigidity of the molecular chain also increases, which increases the brittleness of the paint film; in addition, due to the increased rigidity of the molecular chain, the light resistance of the molecular chain is poor under the irradiation of light, and the molecular chain The groups on the surface are prone to migration, which greatly reduces the water whitening resistance of the paint film

Hardness and water whitening resistance are contradictory properties for acrylic emulsions, and the two cannot have both

Hydrophobic acrylic emulsions need to add hydrophobic functional monomers during the preparation process to make it difficult for water molecules to enter the interior of the film during the process of film formation and soaking in water to achieve a hydrophobic effect. However, there is a disadvantage of such emulsions, which is to enter the interior of the emulsion film. It is also difficult for the moisture to come out, and the molecular accumulation of latex particles in the broken emulsion film causes the water resistance to deteriorate