Di-n-butyltin dilaurate

Schering AG (1999a) Growth inhibition test of di-n-butyltin dilaurate (ZK 21976) on the green algae, Scenedesmus subspicatus. Berlin, Schering AG, 17 February (Research Report No. IC29). 

It is known that organotin compounds such as n-butyltin acid and di-n-butyltin dilaureate accelerate the hardening process of epoxy resins106) and initiate ethylene oxide polymerization 107). 

Mushtaq M, Mukhtar H, Datta K, et al. 1981. Toxicological studies of a leachable stabilizer di-n -butyltin dilaurate (DBTL) Effects on hepatic drug metabolizing enzyme activities. Drug Chem Toxicol 4 75-88. 

HMDI solution in toluene, both in the presence of di-n-butyltin dilaurate (0.07 vol%) as catalyst. The urethanated surface was thoroughly washed with pure acetone to wash away the unreacted HMDI and the catalyst, and then immersed in 3.8 wt% aqueous solution of aminodextran without catalyst or... 

Among organotin compounds the most widely used are various organic salts of dialkyl tin, such as diethyl- and di-n-butyltin dicaprylates, di-n-butyltin dilaurate, di-n-butyltin distearate, etc. As a rule, these compounds are obtained through tin alkylhalogenides. 

Another exception to the tetrahedral geometry for tin complexes are the dialkyltin dicarboxylates, such as di-n-butyltin dilaurate (DBTDL), where the carboxylate can be bidentate and a skew-trapezoidal bipyramidal geometry results (Figure 6.2.2). 

It was also demonstrated that reaction of 6 with ethanol leads cleanly to methyl M-phenylcarbamate and tribntyltin ethoxide (Fignre 6.2.6). There is no report of any cross-over products. Others have argued that mixed carboxylate/alkoxides such as 7 are the active species, but it was admitted that the carboxylate had a higher affinity for tin than alkoxide and thus formation of the critical first catalytic intermediate in the process is not favorable. Indeed, NMR was used to measure an equilibrium constant of 8.3 x 10 for exchange of 2-propanol into di-n-butyltin dilaurate (DBTDL) (Ki of Figure 6.2.7). But at the extremely high hydroxyl/catalyst ratios observed in real systems, this can result in a significant conversion of the catalyst to the first intermediate proposed in the insertion mechanism. 

CAS 77-58-7 EINECS/ELINCS 201-039-8 Synonyms Bis (dodecanoyloxy) di-n-butylstannante Bis (lauroyloxy) dibutylstannane Butynorate DBTL Dibutylbis (lauroyloxy) stannane Dibutylbis (lauroyloxy) tin Di-n-butyltin di (dodecanoate) Di-n-butyltin dilaurate ... 

Di-n-butyltin dilaurate. See Dibutyltin dilaurate Dibutyltin dioleate... 

The analogous thiopolyurethanes with the side tolylmethylthiomethyl or naphthylmethylthiomethyl chains (306) were obtained from 2-(p-tolylmethylthiomethyl)-l,4-butanediol (TB) or 2-(l-naphthylmethylthiomethyl)-1,4-butanediol and HDI or Izocyn T-80 [TDI-80, the mixture of 2,4-TDI (80 wt%) and 2,6-TDI (20 wt%)] by solution (benzene) polymerization in the presence of di-n-butyltin dilaurate (DBTDL) [77-58-7] as catalyst. The polymer based on TB and HDI (ijred = 117 dL/g) was a high elasticity thermoplastic elastomer with tensile strength of 2.2 MPa and elongation at break of 780%. 

---