MORTAR CONCRETE COMPOSITION

摘要

Disclosed is a mortar.concrete composition comprising a polymer emulsion, a portland cement material and an aggregate, which is characterized in that the polymer emulsion is one prepared by neutralizing a seed polymer with an acid or a salt or by quaternizing it with a quaternizing agent, the surfaces of the emulsion grains being thereby highly densely cationated, where the seed polymer is formed by adding a monomer as represented by the following formula (I) or a mixture of the monomer (I) and copolymerizable ethylenic unsaturated monomer(s) (II) to a seed latex of a carboxyl-modified synthetic rubber latex or synthetic resin emulsion and polymerizing them: ( I ) The polymer of the invention may noticeably reinforce the strength of the shaped product even when the amount of the polymer added is small. The polymer dispersion of the invention can be applied to not only the convnetional ordinary materials but also concrete construction materials, although the application to the latter has heretofore been considered economically impossible.