Properties of Emulsion Paint with Modified Natural Rubber Latex/Polyvinyl Acetate Blend Binder

被引:3
|
作者
Ibrahim, Bahruddin [1 ]
Helwani, Zuchra [1 ]
Fadhillah, Ivan [1 ]
Wiranata, Arya [1 ]
Miharyono, Joni [2 ]
机构
[1] Univ Riau, Chem Engn Dept, Pekanbaru 28293, Indonesia
[2] Warna Indah Tirta Asia WITA, Pekanbaru 28291, Indonesia
来源
APPLIED SCIENCES-BASEL | 2022年 / 12卷 / 01期
关键词
emulsion paint binder; grafted natural rubber; liquid natural rubber; natural rubber latex; polyvinyl acetate; STYRENE; LATEX;
D O I
10.3390/app12010296
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The direct use of natural rubber latex (NRL) as a binder for emulsion paints did not produce emulsion paints with good opacity, washability resistance, and regulated touch drying time, even when mixed with polyvinyl acetate (PVAc). This study aimed to study the properties of opacity (hiding power), washability resistance, and set drying touch time of emulsion paint with a binder added from a mixture of modified natural rubber latex (NRL) and PVAc. NRL modifications included UV photodepolymerization with TiO2 catalyst and grafting copolymerization of methyl methacrylate and styrene (NRL-g-(MMA-co-St)). NRL was mixed with PVAC at ratios of 0/100; 15/85; 25/75; 35/65; 50/50; 100/0% w/w before being used as a binder for emulsion paint. Emulsion paint samples had different binder contents, namely 2, 4, 6, and 8% w/w. Tests on paint samples included opacity using a UV-Vis spectrophotometer (EASYSPEC safas Monaco), washability using the Digital BGD 526 Wet Abrasion Scrub Tester, and drying time set using the ASTM STP500 procedure. The results showed that the opacity (hiding power), washability resistance, and set drying touch time met the emulsion paint standards for all binder levels, except the 100% w/w modified NRL composition. The higher level of NRL in the binder causes these properties to decrease and become unstable. The best opacity (hidden power), washing resistance, and drying touch time were obtained on modified NRL with a concentration of 15% w/w. The binder content in the paint was around 4% w/w, with an opacity of about 1.78% abs, washing resistance of 12 times, and the set drying touch time to 80 min.
引用
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页数:9
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