Room temperature self-crosslinking water-based paint as well as preparation method and application thereof

Abstract

The invention provides room temperature self-crosslinking water-based paint as well as a preparation method and an application thereof. The paint has high hardness, high scrubbing resistance and good diffuse reflection performance. The preparation method of the paint comprises the following steps: performing graft modification on alkaline silica sol by utilizing a silane coupling agent containing unsaturated double bonds, thereby obtaining nanosilicon dioxide of which the surface is provided with the unsaturated double bonds; by taking the nanosilicon dioxide as a seed, mixing an acrylate monomer and an epoxy resin in the presence of an initiator, and preparing the room temperature self-crosslinking acrylate emulsion which is subjected to epoxy resin and inorganic particle double modification and has a core-shell structure by utilizing a semi-continuous seeded emulsion polymerization process; and by taking the emulsion as a base material, adding a delustering agent, glass powder, body pigment and paint aids, thereby obtaining the room temperature self-crosslinking water-based paint. The paint is coated on the wall surface or board and can be simultaneously taken as a writing board of a doodling pen and a projection screen of a projector, and the problem that the teaching board and the projection screen are independent from each other and cannot be simultaneously used in the prior art is solved.

Description

technical field [0001] The invention relates to a coating, in particular to a self-crosslinking water-based coating at room temperature. The coating is applied to indoor walls and can be used as a writing board and a projection screen for a water-erasing pen at the same time, meeting the integration of writing and projection in modern classrooms and meeting rooms. need. Background technique [0002] At present, in the classroom teaching of universities, middle schools or elementary schools, there is generally a teaching board fixed on the wall for teachers to write on the blackboard. Usually the size of the teaching board has standard regulations, and the height should not be less than 1000mm. Width: Primary schools should not be less than 3600mm, middle schools should not be less than 4000mm. The vertical distance between the lower edge of the blackboard and the podium: primary schools should be 800-900mm; middle schools should be 1000-1100mm. Since the teaching board ha...

AI Technical Summary

Problems solved by technology

However, the hardness, scrub resistance, water resistance, etc. of the coatings disclosed in these patent documents cannot meet the needs of both writing and projection.

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