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Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings
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...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6401805/ https://www.ncbi.nlm.nih.gov/pubmed/30961160 http://dx.doi.org/10.3390/polym10111235 |
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author | Chang, Chia-Wei Chang, Jing-Ping Lu, Kun-Tsung |
author_facet | Chang, Chia-Wei Chang, Jing-Ping Lu, Kun-Tsung |
author_sort | Chang, Chia-Wei |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-6401805 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64018052019-04-02 Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings Chang, Chia-Wei Chang, Jing-Ping Lu, Kun-Tsung Polymers (Basel) Article 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. MDPI 2018-11-07 /pmc/articles/PMC6401805/ /pubmed/30961160 http://dx.doi.org/10.3390/polym10111235 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Chang, Chia-Wei Chang, Jing-Ping Lu, Kun-Tsung Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings |
title | Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings |
title_full | Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings |
title_fullStr | Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings |
title_full_unstemmed | Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings |
title_short | Synthesis of Linseed Oil-Based Waterborne Urethane Oil Wood Coatings |
title_sort | synthesis of linseed oil-based waterborne urethane oil wood coatings |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6401805/ https://www.ncbi.nlm.nih.gov/pubmed/30961160 http://dx.doi.org/10.3390/polym10111235 |
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