Influence of different photoinitiatiors in the UV-LED curing of polyester acrylated varnishes

被引：2

作者：

Dossin, Ricardo ^{[1
]}

Lavoratti, Alessandra ^{[1
]}

Cercena, Rodrigo ^{[2
]}

Dal-bo, Alexandre Goncalves ^{[2
]}

Gregory Zimmermann, Matheus Vinicius ^{[2
]}

Zattera, Ademir Jose ^{[1
]}

机构：

[1] Univ Caxias do Sul, Lab Polymers, Postgrad Program Proc gn & Technol, En, 1130 Getulio Vargas St,Bldg 5,Room 205, BR-95070560 Caxias Do Sul, RS, Brazil

[2] Univ Extreme South Santa Catarina, Postgrad Program Mat Sci & Engn, Florianopolis, SC, Brazil

来源：

JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH | 2023年 / 20卷 / 01期

关键词：

Photoinitiators; Polyester; Ultraviolet light-light emitting diode curing; Coating; PHOTOCURING BEHAVIORS; MECHANICAL-PROPERTIES; COATINGS; SYSTEMS;

D O I：

10.1007/s11998-022-00679-x

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The search for environmentally friendly coatings has gained relevance in recent years. To circumvent the use of volatile organic compounds, ultraviolet light curing has attracted considerable attention, especially with the recent advances in light emitting diodes (LEDs), wherein one of the most important components is the photoinitiator. Since UV-LED curing has a narrower wavelength spectrum than regular UV curing, the choice of photoinitiator is crucial. In this study, the influence of six types of photoinitiators in the curing of polyester acrylate varnishes was investigated. The post-curing optical, thermal, mechanical, dynamic mechanical, and morphological properties of these varnishes were examined. All varnishes were completely cured, and the resins cured with LED 1711 and diphenyl (acyl) phosphine oxide exhibited the lowest post-curing photoyellowing. Satisfactory mechanical and dynamic mechanical properties were achieved for all samples. However, due to the thickness of the films, more studies are needed to optimize the surface roughness of the varnishes.

引用

页码：393 / 402

页数：10

共 24 条

[1] Physical and thermal properties of UV curable waterborne polyurethane dispersions incorporating hyperbranched aliphatic polyester of varying generation number [J].