DBTDLDibutyltin Dilaurate
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1% catalyst on total formula weight, the DBTDL system achieved the highest degree of dryness (dryness degree = 7, casting not effected by 20 Kg load) in 1.
A small amount of DBTDL was added in the mixture of NP-FPA and SPU with a certain ratio, and the target product was prepared after 30 min.
First, urethane monoacrylate (IPDI-HEA) was obtained from the reaction between the secondary cycloaliphatic NCO group of IPDI and the OH group of HEA using DBTDL as catalyst.
The polyurethane MCs and polycarbonate micropar-ticles filled with DBTDLcould release the DBTDL to control the crosslinking reaction (20), (21).
MDI-multiwalled carbon nanotubes (MWCNTs) were dispersed in DMSO (20 ml) by ultrasonic agitation for 3 h (sonicator: KQ-500TBD, sonication frequency was 80 Hz, and energy was 500 W) forming a suspension, and then they were introduced dropwise into a solution of PVA (500 mg) and DBTDL (10 mg) in 30 ml DMSO at 90 [degrees] C under nitrogen atmosphere with vigorously stirring.
02 wt% DBTDL catalyst (based on the mass of BADCy) stirred for 15 min and quenched before any reaction could occur.
Then DBTDL catalyst is added, the mixture is heated to 90[degrees]C, and the temperature is controlled so that it does not go above 95[degrees]C to avoid side reactions.
Sealant 2711 and 2712 used MTS as cross-linker, and TCC and DBTDL used MTS as catalyst, respectively.
TDI 5% in excess was added along with DBTDL catalyst and pyrogallol inhibitor and these solutions were diluted to 60% solids with MEK solvent and applied on plates with a 40-[micro] applicator.
MDI and DBTDL were used as received, and PPG was dehydrated under vacuum at 110[degrees]C for 2 hr before use.
TEOS in molar ratio TEOS: (chloromethyl)methyl-siloxane units = 2:1 and DBTDL as catalyst (1.