Caption: Figure 5: Proposed mechanism for PU depolymerization catalyzed by dibutyltin dilaurate
Polyurethane polymer based on 2,4-toluenediisocyanate (TDI), poly(propylene glycol) (PPG), and butanediol (BD) were prepared with butanediol as chain extender, dimethylformamide (DMF) as solvent, and dibutyltin dilaurate
(DBTL) as initiator [31, 32].
Methyl methacrylate (MMA); p hydroxyethyl methacrylate (HEMA); methyl Isobornyl (IBOMA); butyl acrylate (BA); styrene (St); dodecafluroheptyl methacrylate ester; Cetyltrimethylammonium bromide(CTAB); dibutyltin dilaurate
(DBTDL); linear two-hydroxy silicone oil; isophorone diisocyanate (IPDI).
International Chemical Safety Cards (ICSC) provided in this document for dibutyltin oxide and dibutyltin dilaurate
are useful and provide instant information to the workers, employers and trainees to make aware about the potential hazards and safety measures to be undertaken in case of emergency declared.
The solvent employed was dimethylacetamide and the reaction was catalysed in the presence of dibutyltin dilaurate
* catalyst - nickel octylacid or dibutyltin dilaurate
(DBTDL, 96 wt% purity, CP) and potassium hydroxide (KOH) was supplied by Shanghai Qingxi Chemical Reagent, China.
, DBTDL, was used as a catalyst and is available as Dabco[TM] T-12 from Air Products.
0.94 g DMPA, 50 mL acetone, and 2 drops of dibutyltin dilaurate
were added successively.
Dioctyltin and dibutyltin compounds that efficiently catalyze many of these crosslinking reactions include dioctyltin diacetylacetonate and dibutyltin dilaurate
. However, concerns about toxicity of tin compounds have driven formulators to explore other catalyst options.
Triethylamine (TEA), dibutyltin dilaurate
(DBTDL), and hydroquinone were obtained from Sinopharm.
Sodium L-tartrate dehydrate and dibutyltin dilaurate
form a water-generating mixture for an ethylene vinyltrimethoxysilane copolymer.