Coating classification: catalytic curing two-component polyurethane coating

Core tip: catalytic curing two-component polyurethane coating is a two-component polyurethane coating with polyisocyanate prepolymer as component A and catalytic curing agent as component B The characteristic of catalytic curing two-component polyurethane coating is that it can be cured at low temperature with fast curing speed Generally, the coating can be dried in 1-2 hours and has the advantages of strong adhesion, good water resistance, good wear resistance and good gloss However, it is not suitable to prepare color paint because of the difficulty of salt pigment dispersion The main varieties are limited to varnish, wood, concrete, metal surface finishing, etc Resin structure and resin base of catalytic curing two component polyurethane coating Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Home of coatings: catalytic curing two-component polyurethane coating is a two-component polyurethane coating with polyisocyanate prepolymer as component A and catalytic curing agent as component B The characteristic of catalytic curing two-component polyurethane coating is that it can be cured at low temperature with fast curing speed Generally, the coating can be dried in 1-2 hours and has the advantages of strong adhesion, good water resistance, good wear resistance and good gloss However, it is not suitable to prepare color paint because of the difficulty of salt pigment dispersion The main varieties are limited to varnish, wood, concrete, metal surface finishing, etc The resin structure and resin base material of catalytic curing two-component polyurethane coating are similar to that of one component moisture curing polyurethane coating The prepolymer prepared from castor oil glycol, polyethylene glycol, polypropylene triol and excessive diisocyanate is often used as resin base material The function of catalytic curing agent is to accelerate the drying speed of the coating, and it can dry thoroughly Its prepolymer has low molecular weight and low content of - NCO If only curing by moisture, the curing speed is slow, and the chemical stability of the coating can be improved The selection and amount of catalyst used in the two-component polyurethane coating have a great influence on the performance of the coating The types of commonly used catalysts are shown in the table below For organic amine catalyst, the dosage is generally 0.1% - 0.4%; for metal organic salt (such as cobalt epoxide and lead epoxide), the dosage is generally 0.05% - 0.07% Examples of commonly used catalyst type compounds for catalytic curing polyurethane coatings reactive hydroxylamine compounds n, N, N, N, - tetra (α - hydroxypropyl) ethylenediamine, methyldiethanolamine, triesopropanolamine non reactive metal organic salts In February, dibutylene silicate, dibutyl tin dilaurate, stannous chloride, ferrous chloride, stannous zincate, lead epoxide, cobalt tertiary amine 4, 2-diphenylmethane diamine, triethylamine coatings are home to coatings, diatom mud, paint coating, coating technology, fire-resistant coating news and coating, diatom mud, paint coating, coating technology, Decoration knowledge and effect drawing of fireproof coating,