General knowledge of coating: characteristics of spray polyurea elastomer coating

It is suggested that in polyurethane system, in order to improve the reaction activity, catalyst must be added The catalyst can not only catalyze the reaction of hydroxyl and isocyanate, but also catalyze the reaction of isocyanate and water, resulting in gas generation, resulting in a sharp decline in material performance Polyurea system is totally different, which uses amine terminated polyether and amine chain extender as active hydrogen component, and isocyanate component Without any catalyst, the reaction can be completed at room temperature (even below 0 ℃) The chemical equations for each reaction are as follows: Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Home of coatings: Polyurethane In the system, in order to improve the reaction activity, catalyst must be added The catalyst can not only catalyze the reaction of hydroxyl and isocyanate, but also catalyze the reaction of isocyanate and water to produce gas, which leads to the sharp decline of material performance The polyurea system is completely different It uses amine terminated polyether and amine chain extender as the active hydrogen component, which has very high reaction activity with isocyanate component With any catalyst, the reaction can be completed at room temperature (even below 0 ℃) The chemical equations of each reaction are as follows: paint house focuses on coatings, diatom mud, paint coating, coating process, news and coating of fire retardant coating, diatom mud, paint coating, coating process, decoration knowledge and decoration effect map of fire retardant coating,