Polyurethane Catalyst Types

Polyurethane catalysts are substances that facilitate and accelerate the chemical reaction between isocyanates and polyols, leading to the formation of polyurethane. There are several types of polyurethane catalysts, including:

Amine Catalysts: These catalysts are usually tertiary amines or amine complexes, such as triethylene diamine (TEDA), dimethylcyclohexylamine (DMCHA), and N-methylmorp

holine (NMM). They are commonly used in the production of rigid polyurethane foams.

Tin Catalysts: These catalysts are typically organotin compounds, such as dibutyltin dilaurate (DBTDL) and stannous octoate. They are used for both rigid and flexible polyurethane foams, as well as in other polyurethane applications.

Bismuth Catalysts: These catalysts are typically bismuth carboxylates, such as bismuth neodecanoate. They are commonly used in the production of flexible polyurethane foams.

Zinc Catalysts: These catalysts are usually zinc carboxylates, such as zinc octoate. They are commonly used in the production of coatings and adhesives.

Phosphine Catalysts: These catalysts are typically phosphine complexes, such as triphenylphosphine (TPP). They are used in the production of rigid polyurethane foams and other polyurethane applications.

Organometallic Catalysts: These catalysts are usually metal complexes, such as cobalt acetylacetonate. They are used in the production of polyurethane coatings and adhesives.

The choice of catalyst depends on the specific polyurethane application, as well as the desired processing conditions and physical properties of the final product.