Proceedings of the International Conference on Logistics, Engineering, Management and Computer Science

Preparation and Characterization of Low-gloss Waterborne Polyurethane Coatings

Authors
Liang Zhang
Corresponding Author
Liang Zhang
Available Online July 2015.
DOI
https://doi.org/10.2991/lemcs-15.2015.163How to use a DOI?
Keywords
Waterborne polyurethane; Polydimethylsilo-xane; Polyethylene glycol; Copolymerization; Low-gloss
Abstract
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.
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Proceedings
International Conference on Logistics Engineering, Management and Computer Science (LEMCS 2015)
Part of series
Advances in Intelligent Systems Research
Publication Date
July 2015
ISBN
978-94-6252-102-5
ISSN
1951-6851
DOI
https://doi.org/10.2991/lemcs-15.2015.163How to use a DOI?
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  -