Is the catalyst really not involved in the chemical reaction? Why can we change the reaction rate? IUPAC defines catalyst as a substance that changes the reaction rate but does not change the total standard Gibbs free energy of the reaction. This action is called catalysis, and the reaction involving catalyst is called catalytic reaction.
PMDETA catalyst, pentamethyldiethylenetriamine, CAS 3030-47-5, pentamethyldiethylenetriamine, C9H23N3
The catalyst itself may not have to be added, and the quality may not be unchanged (some become more and some become less).
For example, permanganate oxidizes oxalic acid, and the product manganese bivalent is the catalyst (more and more, so is manganese trivalent and manganese tetravalent)
PMDETA catalyst, pentamethyldiethylenetriamine, CAS 3030-47-5, pentamethyldiethylenetriamine, C9H23N3
(Of course, the reaction is very slow at the beginning when manganese dioxide is not added. After all, it is not easy to redox between the two anions. Of course, there is still a reaction after half an hour of fast stirring by hand.)
Of course, the quality of catalyst decreases after reaction
PMDETA catalyst, pentamethyldiethylenetriamine, CAS 3030-47-5, pentamethyldiethylenetriamine, C9H23N3
The consumption of sodium is very small, so it is still used as a catalyst.
ZF-10: high-efficiency low-odor foaming catalyst, typically used to prepare low-odor polyurethane foam products
ZR-50: Low odor gel catalyst, providing excellent balance, which can be used for polyurethane molding high resilience foam
Z-131: Reactive low odor gel amine catalyst compound
Z-130: Low odor gel catalyst, balanced gel/foaming
ZR-70: low odor catalyst, used for packaging foam and molding foam on vinyl skin, with good balance between foam and gel
ZR-40 (pentamethyldipropylenediamine): It is especially effective for cold molding high resilience foam, and the catalyst with low odor gel and good foaming balance
LE-310: Low odor reactive gel catalyst applied to large sponge, new low VOC amine gel catalyst, amine content more than 95%
LE-530: reactive gel catalyst, used for various polyurethane foaming products
DPA: low odor gel catalyst, outstanding balance and versatility provide good liquidity
TAP 1-methyl-4 – (2-dimethylaminoethyl) piperazine: excellent trimerization catalyst, which can improve the fluidity
DMDEE (2,2 ‘- dimorpholine diethyl ether): strong foaming catalyst, providing stable prepolymer system
DMAEE: low-density full water hard foam and low-density semi hard foam
BDMAEE bis – (2-dimethylaminoethyl) ether: an efficient foaming catalyst
BDMA (N, N-dimethylbenzylamine): polyurethane hard foam catalyst, epoxy accelerator
DMEA (N, N ‘- dimethylethanolamine): neutralize acid in some hard bubble systems,
PMDETA (pentamethyldiethylenetriamine): It is particularly effective for HCFC/water foamed hard foam, similar to PC5
