Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Chang, Chia-Wei, Chang, Jing-Ping, Lu, Kun-Tsung
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
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
_version_ 1783400235997855744
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
work_keys_str_mv AT changchiawei synthesisoflinseedoilbasedwaterborneurethaneoilwoodcoatings
AT changjingping synthesisoflinseedoilbasedwaterborneurethaneoilwoodcoatings
AT lukuntsung synthesisoflinseedoilbasedwaterborneurethaneoilwoodcoatings