Ceballos Diana M, Reeb-Whitaker Carolyn, Sasakura Miyoko, Dills Russell, Yost Michael G
1.Department of Environmental and Occupational Health Sciences, University of Washington, Box 357234, Seattle, WA 98195-7234, USA
2.Safety and Health Assessment and Research for Prevention (SHARP) Program, Washington State Department of Labor and Industries, PO Box 44330, Olympia, WA 98504-4330, USA.
Ann Occup Hyg. 2015 Apr;59(3):358-72. doi: 10.1093/annhyg/meu099. Epub 2014 Dec 1.
Determine protection effectiveness of 5-mil natural rubber latex (0.13-mm), 5-mil nitrile rubber (0.13-mm), and 13-mil butyl rubber (0.33-mm) glove materials against solvents present in a commonly used automotive clear coat formulation using a novel permeation panel. The latex and nitrile gloves were the type commonly used by local autobody spray painters.
Glove materials were tested by spraying an automotive clear coat onto an automated reciprocating permeation panel (permeation panel II). Temperature, relative humidity, and spray conditions were controlled to optimize clear coat loading homogeneity as evaluated by gravimetric analysis. Solvent permeation was measured using charcoal cloth analyzed by the National Institute for Occupational Safety and Health 1501 method.
Natural rubber latex allowed 3-5 times the permeation of solvents relative to nitrile rubber for all 10 solvents evaluated: ethyl benzene, 2-heptanone, 1-methoxy-2-propyl acetate, o-xylene, m-xylene, p-xylene, n-butyl acetate, methyl isobutyl ketone, petroleum distillates, and toluene. There is a distinct behavior in solvent permeation before and after the coating dry time. Solvent permeation increased steadily before coating dry time and remained fairly constant after coating dry time. Butyl was not permeated by any of the solvents under the conditions tested.
Commonly used 5-mil thick (0.13-mm) latex and nitrile gloves were ineffective barriers to solvents found in a commonly used clear coat formulation. Conversely, 13-mil (0.33-mm) butyl gloves were found to be protective against all solvents in the clear coat formulation.
使用新型渗透面板，确定5密耳天然橡胶乳胶（0.13毫米）、5密耳丁腈橡胶（0.13毫米）和13密耳丁基橡胶（0.33毫米）手套材料对常用汽车清漆配方中存在的溶剂的防护效果。乳胶和丁腈手套是当地汽车车身喷漆工常用的类型。
通过将汽车清漆喷涂到自动往复式渗透面板（渗透面板II）上来测试手套材料。控制温度、相对湿度和喷涂条件，以优化通过重量分析评估的清漆负载均匀性。使用经美国国家职业安全与健康研究所1501方法分析的活性炭布测量溶剂渗透。
对于所评估的所有10种溶剂：乙苯、2-庚酮、1-甲氧基-2-丙基乙酸酯、邻二甲苯、间二甲苯、对二甲苯、乙酸正丁酯、甲基异丁基酮、石油馏出物和甲苯，天然橡胶乳胶的溶剂渗透量是丁腈橡胶的3至5倍。涂层干燥时间前后溶剂渗透存在明显差异。涂层干燥时间前溶剂渗透稳步增加，涂层干燥时间后保持相当恒定。在所测试的条件下，丁基橡胶未被任何溶剂渗透。
常用的5密耳厚（0.13毫米）乳胶和丁腈手套对常用清漆配方中的溶剂不是有效的屏障。相反，发现13密耳（0.33毫米）丁基手套对清漆配方中的所有溶剂都有防护作用。
