last week, the price of domestic ethylene glycol market fluctuated and dropped slightly. the overall price of ethylene glycol fell by 0.91% last week,…

at present, the domestic ethylene glycol market is undergoing shock and consolidation. at present, the electronic trading is weak and nward. the main …

from the point of view of being in the first year of a new century of coatings, the coatings industry in 2016 is special; but judging from the overall…

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…