Water-borne blocked isocyanates (WBIs) were synthesized using toluene 2,4-diisocyanate (TDI), trimethylolpropane, dimethylolpropionic acid, 2-methylimidazole (2-MI), and methyl ethyl ketoxime (MEKO). The particle size, viscosity, pH, and storage stability of the WBI dispersions were studied and compared. De-blocking temperatures of the WBIs were characterized by Fourier transform infrared (FT-IR), differential scanning calorimetry (DSC), and thermo-gravimetric analysis (TGA) techniques. The thermal analysis revealed that MEKO-blocked TDI adducts and 2-MI-blocked TDI adducts started to de-block at about 70.7 and 125.2 °C, respectively. The storage stability results showed that all dispersions prepared were stable for more than 6 months. The dispersions prepared were all in liquid form and miscible (compatible) with acrylic dispersion. Gelation test results confirmed that MEKO-blocked isocyanate adducts dispersions de-block at higher temperatures and cure at faster rates than 2-MI-blocked isocyanate adducts dispersions. These anionically modified blocked isocyanate adducts can be used as potential crosslinkers.
Research on Chemical Intermediates – Springer Journals
Published: Nov 1, 2012
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera