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ynthesis and characterization of diethylene glycol monobutyl ether — Blocked iisocyanate crosslinkers
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ranjbar Montazeri, Sh. Nayini, Mohsen Mohammad Raei Jannesari, A. |
| Copyright Year | 2010 |
| Abstract | Typically blocked isocyanate systems are used to obtain the performance of two component polyurethane (PU) system in a one-component mixture. In this study four types of isocyanates namely, hexamethylene diisocyanate (HDI), diphenylmethane diisocyanate (MDI), isophorone diisocyanate (IPDI) and toluene diisocyanate (TDI) were blocked with diethylene glycol monobutyl ether (DEGMBE). Elimination of the locked isocyanate eblocking temperature olyurethane coatings iethylene glycol monobutyl ether isocyanate groups and the formation of urethane bonds were studied by FTIR spectroscopy and titration methods. Thermal dissociation of blocked diisocyanates was analyzed by DSC and TGA techniques. Deblocking temperature obtained by DSC and TGA techniques was compared. Based on DSC data, it was found that deblocking of blocked MDI and TDI starts at lower temperatures compared to that of the aliphatic one (HDI). Reactivity of the blocked IPDI is between blocked MDI and blocked TDI. show temp In general, TGA results temperature. Deblocking |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://novelcoatings.com/wp-content/uploads/a-28.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |