Adhesion and doodling prevention coating

Abstract

The invention relates to a waterborne two-component adhesion and doodling prevention coating, which is prepared by mixing a component A and a component B according to the proportion of NCO / OH=1.5-2, wherein the component A is prepared from the following components in part by weight: 60 to 80 parts of waterborne polyurethane, 0.3 to 0.6 part of dispersing agent, 0.4 to 0.8 part of defoaming agent, 0.1 to 0.5 part of wetting agent, 1 to 5 parts of modified hydroxyl polydimethylsiloxane resin, 3 to 7 parts of waterborne wax emulsion, 0.6 to 1 part of polyurethane thickening and flatting agent and 5 to 35 parts of water; the modified hydroxyl polydimethylsiloxane resin comprises 22.5+ / -0.5 percent of NCO in percentage by weight; and the component B is hydrophilic aliphatic polyisocyanate of hexamethylene diisocyanate. The coating has equivalent permanence doodling prevention performance with an oily polyurethane doodling prevention coating and an oily fluorocarbon doodling prevention coating, and also has the characteristics of wear resistance, washing resistance, weather fastness and environmental protection.

Description

technical field [0001] The invention relates to architectural decoration coatings, in particular to an anti-sticking anti-graffiti coating and a preparation method thereof. Background technique [0002] In the city, whether it is the telephone poles, light boxes, station signs, guardrails on the street, or the walls, stairs, anti-theft doors, and newspaper boxes in the corridors, you can see small advertisements scribbled and pasted everywhere. ", this uncivilized phenomenon not only seriously affects the appearance of the city, but also causes the breeding and spread of various illegal activities. However, due to the size of the city, the managers are beyond their reach, especially the behavior of scribbling and scribbling usually occurs at night, so the rectification activities often fall into the vicious circle of "rectification-resurgence-re-rectification-re-resurgence". To solve this problem , people have taken various methods, invented multiple coatings and are coated...

AI Technical Summary

Problems solved by technology

In these anti-graffiti coatings, some anti-graffiti active ingredients are only physically mixed with other ingredients in the paint film. After a period of use, the active ingredients freely distributed on the paint film surface are wiped off, resulting in a decrease in anti-graffiti function. Even disappear, because the active ingredients are distributed freely on the surface of the paint film and adhere to dust

Others such as oily polyurethane or oily fluorocarbon anti-graffiti coatings, although they solve the problems of anti-sticking and anti-graffiti persistence, these are all oily products, which pollute the urban environment during construction and drying

Images