Coating formulation: formulation design of PP plastic surface coating (primer)

The key points are as follows: first of all, the coating used for plastic surface should have two basic properties: ① the coating must have good adhesion to the plastic Wetting is the premise of coating adhesion Any metal surface has strong polarity and large surface tension, which creates good conditions for coating wetting However, the surface tension of PP plastic is relatively low To achieve good adhesion of coating on PP plastic, good wetting should be produced on the surface of PP plastic, and proper corrosion can be achieved by changing the composition of solvent So as to produce good wetting ② The structure of the coating shall be as far as possible Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Paint Home News: paint used for plastic surface should first have two basic properties: ① paint must have good adhesion to plastic Wetting is the premise of coating adhesion Any metal surface has strong polarity and large surface tension, which creates good conditions for coating wetting However, the surface tension of PP plastic is relatively low To achieve good adhesion of coating on PP plastic, good wetting should be produced on the surface of PP plastic, and proper corrosion can be achieved by changing the composition of solvent So as to produce good wetting ② The structure of the coating shall be as similar as possible to PP PP molecules contain polar groups According to the principle of "similar compatibility", coatings with certain polar groups should be selected Therefore, for polar PP plastics, chlorinated polyolefin with similar structure should be selected to prepare primer, so CPP should be selected as the resin of primer Mix CPP and solvent first, the ratio of CPP and solvent is 5 / 95 (by mass), and let it stand for more than half a day When CPP can be fully expanded by some solvents, then heat the mixture to dissolve into solution Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,