introduction to polyurethane delay catalyst-tmpda-tetramethylpropylenediamine

does anyone have an introduction to polyurethane delay catalysts? delay catalyst is a polyurethane delay catalyst. compared with conventional catalysts, it has a longer operating time and does not affect the later curing of the product. the delayed catalyst itself is also a type of positive catalyst. when added to a catalyst-free system, it will only speed up the reaction speed of the system and will not inhibit the reaction speed. delayed catalysts are widely used in polyurethane rigid foam, polyurethane flexible foam, molded foam, polyurethane adhesives, coatings, elastomers, shoe sole slurries and other fields. generally speaking, delayed catalysts can be divided into delayed foaming catalysts and delayed gel catalysts. both can be widely used in the field of polyurethane foam, while delayed gel polyurethane catalysts are mostly used in the case field. thermal sensitive catalysts are also a type of delayed catalysts. delayed amine catalyst a-300 is a delayed cross-linking catalyst specially designed for the production of polyurethane for automobile seat cushions and backrests. the foam produced will be more open-pored, but at the same time, the stability of the foaming formula will be maintained and the foam will not collapse. for systems containing modified ingredients, fast response and slow flow, the fluidity can be improved. delayed amine catalyst c-225 is an amine catalyst used for rapid release of high-resilience polyurethane foam. this catalyst can balance the foam formation reaction and the aging reaction, optimize the fluidity of the reaction mixture, and shorten the demoulding time at the same time. therefore, delayed amine catalyst c-225 is the best additive for use in the turntable car seat production line. delayed amine catalyst a-400 is a water-soluble tertiary amine composite catalyst with delayed catalysis used for molded polyurethane foam plastics. it is specially designed for the production of automobile seat cushions. delayed amine catalyst a-400 can be metered alone mixed with water or polyether polyol. good for lasting pour time and increasing open cell foam structure. delayed amine catalyst a-400 and dongguan guangzhou delayed amine catalyst a-300 are both new types of delayed action catalysts.