Summary

DBTDL catalyst (dibutyltindilaurate) is a high-boiling liquid organotin compound used as an effective catalyst in the production of polyurethane foams, coatings, adhesives and sealants. Since pure dibutyltindilaurate is a solid at room temperature, DBTDL catalyst has been specifically formulated to remain liquid at temperatures above 10C to permit easier handling in most applications. The residual-free […]

Applications

  • DBTDLcatalyst finds wide use in the manufacture of rigid polyurethane foams. In demanding applications where amine catalysis alone is inadequate, the extra activity obtained by the synergistic combination of organometallics like DBTL catalyst with an amine catalyst permits the required rapid catalysis. Examples of these applications include high-density structural foam, spray-up wall insulation and rigid boardstock run at high line speeds. Even when used at levels as low as 0.1 pph polyol, DBTDL catalyst is especially effective in promoting rapid gel and tack-free times.
  • Tetravalent diorganotins like DBTDL catalyst are known throughout the industry as promoters of the reaction of isocyanates with polyols to form polyurethanes, and of the secondary cross-linking reactions to form allophonate and biuret linkages.
  • Because of this selectivity for polymerization, DBTDL catalyst is often a benchmark in the catalysis of polyurethane systems including two-component adhesives and moisture-cure coatings, where the oxidative stability of tetravalent tins permits master batching of components. Use-life and retention of catalytic activity of such a master batch are dependent upon the presence of amines, moisture and other additives as well as on the storage temperatures. Organotin carboxylates will hydrolyse like any ester, so applications demanding specific pot lives should be laboratory screened first.
  • Additionally, T12-CL catalyst is an essential ingredient in moulded and slabstock high-resiliency foam used in automobile, furniture and bedding applications. The contribution of DBTD Lcatalyst has its greatest effect in promoting rapid cure and improving key mechanical properties such as compression set and tear resistance.