Next Article in Journal
Reinforcement of Castor Oil-Based Polyurethane with Surface Modification of Attapulgite
Next Article in Special Issue
Green Processes for Green Products: The Use of Supercritical CO2 as Green Solvent for Compatibilized Polymer Blends
Previous Article in Journal
Mechanical, Thermal, and Shape Memory Properties of Three-Dimensional Printing Biomass Composites
Previous Article in Special Issue
Aging Properties of Phenol-Formaldehyde Resin Modified by Bio-Oil Using UV Weathering
Article Menu
Issue 11 (November) cover image

Export Article

Open AccessArticle
Polymers 2018, 10(11), 1235;

Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings

Department of Forestry, National Chung Hsing University, 250, Kuo-Kuang Rd., Taichung 402, Taiwan
Author to whom correspondence should be addressed.
Received: 23 October 2018 / Revised: 2 November 2018 / Accepted: 5 November 2018 / Published: 7 November 2018
(This article belongs to the Special Issue Bio-Based Resins and Crosslinked Polymers from Renewable Resources)
PDF [3895 KB, uploaded 7 November 2018]
  |     |  


The linseed oil glyceride (LOG) was synthesized by using a transesterification process with a glycerol/linseed oil molar ratio of 1.0. The waterborne urethane oil (WUO) wood coating was prepared by acetone process. First, dimethylolpropionic acid was reacted with hexamethylene diisocyanate (HDI) or isophorone diisocyanate (IPDI), followed by adding LOG at various NCO/OH molars of 0.7, 0.8, and 0.9, respectively, and the COOH-containing prepolymer was obtained. Then, the ionomer which was prepared by neutralizing prepolymer with trimethylamine, was dispersed by adding deionized water, and the water–acetone dispersion was obtained. Finally, the acetone was removed by vacuum distillation. In the whole synthesized process, the LOG and COOH-containing prepolymer could be steadily synthesized by FTIR analysis, and the weight-average molecular weight and polydispersity of COOH-containing prepolymer increased with an increase of NCO/OH molar ratios. During the water dispersion process of the ionomer acetone solution, the point of phase inversion was prolonged, meaning the solid content decreased with an increase of NCO/OH molar ratios. After acetone was removed, the color of WUO was milky-white, and it was weakly alkaline and possessed a pseudoplastic fluid behavior. The particle size of WUO increased with increasing of NCO/OH molar ratios, however, the storage stability was extended for HDI and shortened for IPDI synthesized with increasing of NCO/OH molar ratios. View Full-Text
Keywords: linseed oil; acetone process; waterborne urethane oil; wood coatings linseed oil; acetone process; waterborne urethane oil; wood coatings

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Chang, C.-W.; Chang, J.-P.; Lu, K.-T. Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings. Polymers 2018, 10, 1235.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Polymers EISSN 2073-4360 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top