A-1 catalyst is mainly used in the production of flexible polyether polyurethane foam, and can also be used in rigid foam for packaging. A-1 has a particularly strong catalytic effect on water, so it can reduce the foam density. It is about 80% effective in controlling gas-producing reactions and about 20% effective in controlling gel reactions. The catalyst has high activity and low dosage. By adjusting the dosage of this series, the foaming rise and gel time can be controlled. A-1 is shared with organotin catalyst, which can significantly improve the production tolerance of foam plastics, ensuring that unnecessary quality problems will not be caused by careless operation or small errors in the metering system during production, and high-quality soft plastics can be produced. Styrofoam.
A-1 catalyst is widely used in various formulations for manufacturing polyurethane foam, and is especially suitable for the production of high resilience, semi-rigid foam and low-density foam.
Amine catalysts
Amine catalysts are generally used in the production of polyurethane foams and are mainly divided into the following categories:
Aliphatic amine catalysts include N,N-dimethylcyclohexane Amine, bis(2-dimethylaminoethyl) ether, N,N,N’,N’-tetramethylalkylenediamine, triethylamine, N,N-dimethylbenzylamine, etc.
Alicyclic amine catalysts include solid amines, N-ethylmorpholine, N-methylmorpholine, N,N’-diethylpiperazine, etc.
Alcohol compound catalysts include triethanolamine, DMEA, etc.
Aromatic amines include pyridine, N,N’-dimethylpyridine, etc.
Organometallic Catalysts
In the formulations of polyurethane elastomers and adhesives, coatings, sealants, waterproof coatings, paving materials, etc., organometallic catalysts such as dibutyltin dilaurate (DY-12) The most commonly used, it is very effective in promoting the reaction between isocyanate groups and hydroxyl groups, but it also has a certain acceleration effect on the reaction between water and isocyanate in formulas with moisture; special catalysts such as organic lead can be used in formulas such as plastic runways.
Organometallic compounds include carboxylates, metal alkyl compounds, etc. The metal elements contained mainly include tin, potassium, lead, mercury, zinc, etc. The most commonly used are organotin compounds.
