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in the preparation process of polyurethane foam, the main role of the catalyst is to adjust the speed of the foaming reaction and gelation reaction to…
influence of catalysts, the one-step process requires a more active catalyst than the prepolymer process, and a composite catalytic system of organoti…
1 there are various accidents and problems encountered in actual foam production, and each accident is caused by many factors. in the analysis of acci…
petrochemical catalysts an important type of product in the catalyst industry, it is used in chemical processing processes in the production of petroc…
industrial catalysts catalysts occupy an extremely important position in the modern chemical industry. more than 90% of chemical production processes …
project introduction catalysis is the study of the effects of energy barriers and rates of chemical reactions on other substances. usually in the hete…
1. hydroxyl value: the amount of hydroxyl (-oh) contained in 1 gram of polymer polyol is equivalent to the number of milligrams of koh in mgkoh/g. 2. …
1． what is spray rigid foam polyurethane? spray rigid foam polyurethane is made of isocyanate (mdi, commonly known as black material) and polyol (comm…
background polyurethane rigid foam used in the construction industry is an important branch of the polyurethane industry. it is characterized by its m…
polyurethane is a polymer containing a urethane group (-nhcoo) in the polymer backbone. the full name is polyurethane, or polyurethane (pu) for short….
1. definition 1. hydroxyl value: the amount of hydroxyl (-oh) contained in 1 gram of polymer polyol is equivalent to the number of milligrams of koh i…
it is an indisputable fact that various synthetic polymer materials such as plastics and rubber are ubiquitous in our lives. however, among the many p…
