A kind of anti-fresh cement efflorescence primer styrene-acrylic emulsion and preparation method thereof

Abstract

The invention provides primer styrene-acrylic emulsion resistant to fresh cement efflorescence. The primer styrene-acrylic emulsion resistant to fresh cement efflorescence comprises components of water, styrene, methyl methacrylate, iso-octyl acrylate, butyl acrylate, acrylic acid, methacrylic acid, methacrylamide, an anionic emulsifier, cross-linking monomers, special functional monomers, an initiator, an oxidizing agent and a reducing agent, and is prepared from the components in parts by mass as follows: 80-130 parts of water, 30-60 parts of styrene, 20-80 parts of methyl methacrylate, 10-20 parts of iso-octyl acrylate, 20-80 parts of butyl acrylate, 0.5-5 parts of acrylic acid, 0.5-5 parts of methacrylic acid, 1-5 parts of methacrylamide, 5-20 parts of the anionic emulsifier, 1-5 parts of the cross-linking monomers, 0.5-2 parts of the special functional monomers, 0.2-1 part of the initiator, 0.1-0.5 parts of the oxidizing agent and 0.1-0.5 parts of the reducing agent.

Description

technical field [0001] The invention relates to the processing field of architectural coatings, in particular to a styrene-acrylic emulsion of an anti-fresh cement efflorescence primer and a preparation method thereof. Background technique [0002] With the gradual acceleration of urbanization in my country, the use of architectural coatings has become increasingly frequent. Traditional architectural coatings are usually applied after the cement is fully cured and formed. The reason is that after the cement-based putty is built on the interior and exterior walls, the cement will produce alkaline substances containing hydroxide radicals mainly calcium hydroxide during the forming process. , forming phenomena such as pan-alkaline and salting-out. This alkaline substance is extremely easy to appear through the paint film of architectural coatings, which seriously affects the normal use of architectural coatings. For this reason, the traditional cement curing and molding perio...

AI Technical Summary

Problems solved by technology

However, the alkaline substances in the depth of the cement layer are gradually precipitated, and it is difficult to completely neutralize them by rubbing the acid layer, resulting in phenomena such as efflorescence and salting out, which can only be alleviated but not eliminated.

Second, it is difficult to ensure the uniformity of the acid treatment layer. The acid content is lower on the top of the wall and higher on the bottom.

This phenomenon causes normal stratification of the upper part of the efflorescence and the lower part of the wall after the paint is wiped, so that the above-mentioned wall needs to be reworked, which greatly increases the construction cost