Introduction to polyurethane catalyst
According to the definition of the International Union of Pure and Applied Chemistry (IUPAC) in 1981: A catalyst is a substance that changes the reaction rate but does not change the total standard Gibbs free energy of the reaction. It can shorten reaction time, improve production efficiency, selectively promote positive reactions and inhibit side reactions.
In the production process of polyurethane products, The main functions of the catalyst are:
• Promote chain growth reaction
• Promote certain elements in the reaction system Reaction rate of chemical reactions
• Regulate competitive responses and promote primary Reaction, slow down or inhibit side reactions
Polyurethane catalyst classification
• By ingredient
•Divided by effect
•By application field
Tertiary amine catalyst
LE-310: Low odor reactive gel catalyst applied to large sponges, new lowVOC amine gel catalyst, amine content exceeds 95%
LE-530: Reactive gel catalyst, used in various polyurethane foam products
DPA: Low-odor gel catalyst, outstanding balance and versatility provide good fluidity
TAP 1-methyl-4-(2-dimethylaminoethyl)piperazine: Excellent trimerization catalyst that can improve fluidity
DMDEE (2,2′-dimorpholindiethyl ether): Strong foaming catalyst, providing stable prepolymer system
DMAEE: low-density full-water rigid foam and low-density semi-rigid foam
BDMAEE bis-(2-dimethylaminoethyl) ether：High-efficiency foaming catalyst
BDMA (N,N-dimethylbenzylamine)：Polyurethane rigid foam catalyst, epoxy accelerator
DMEA (N,N’-dimethylethanolamine): Neutralizes acids in some rigid foam systems,
PMDETA (pentamethyldiethylenetriamine): Especially effective for HCFC/water-foamed hard foam, similar to PC5
