Preparation and Characterization of Low-gloss Waterborne Polyurethane Coatings
Available Online July 2015.
- https://doi.org/10.2991/lemcs-15.2015.163How to use a DOI?
- Waterborne polyurethane; Polydimethylsilo-xane; Polyethylene glycol; Copolymerization; Low-gloss
- In this research, a series of anionic low-gloss waterborne polyurethanes were prepared, and their surface structures were studied. Samples were prepared with terminal hydroxyl polydimethylsiloxane (PDMS), polyethy-lene glycol (PEG) of different molecular weight, toluene diisocyanate (TDI), dimethylolpropionic acid (DMPA), in the presence of dibutyltin dilaurate (DBTDL) catalyst, neutral-lized by triethylamine (TEA). Preparation process was optimized to get better emulsion stability and matting effect of coating. The preparation process is: at 90 , react terminal hydroxyl polydimethylsiloxane, polyethylene glycol, toluene diisocyanate and dibutyltin dilaurate catalyst together for 4h. Cool the performed polymer to 50 , then add quantified dimethylolpropionic acid and solvent such as tetrahydrofuran, heat to 70 and react for 2h. Cool polymer to room temperature, add quantified triethyl-amine and deionized water to make emulsions. Matting aqueous polyurethane under the conditions of R = 1.2, DMPA mass fraction of 6%, PEG molecular weight of 1000, PEG / PDMS molar ratio = 1: 3, catalyst mass fraction of 0.5%, neutralization degree 100%, latex solid content of 20%, gets the best overall performance, 60 ° gloss of 3.3, in line with matting standards.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Liang Zhang PY - 2015/07 DA - 2015/07 TI - Preparation and Characterization of Low-gloss Waterborne Polyurethane Coatings BT - International Conference on Logistics Engineering, Management and Computer Science (LEMCS 2015) PB - Atlantis Press SP - 828 EP - 831 SN - 1951-6851 UR - https://doi.org/10.2991/lemcs-15.2015.163 DO - https://doi.org/10.2991/lemcs-15.2015.163 ID - Zhang2015/07 ER -