Slow Curing of Aliphatic Polyisocyanate Paints in Automotive Refinishing: A Potential Source for Skin Exposure
Slow Curing of Aliphatic Polyisocyanate Paints in Automotive Refinishing: A Potential Source for Skin Exposure
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汽车修补中脂肪族多异氰酸酯涂料的缓慢固化：皮肤暴露的潜在来源
DOI：
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发表时间：
2007
影响因子：
2
通讯作者：
Youcheng Liu
中科院分区：
文献类型：
--
作者：
D. Bello;J. Sparer;C. Redlich;K. Ibrahim;M. Stowe;Youcheng Liu
含有脂肪族异氰酸酯的双组分聚氨酯涂料广泛用于车身喷涂。此类异氰酸酯可引起哮喘，皮肤暴露可能是致敏的重要途径，并可能导致异氰酸酯哮喘的发生。汽车车身工人经常接触最近油漆过、干燥过的汽车零件。目前尚不清楚新涂漆的汽车表面完全固化的速度，也就是说，在初始干燥后，未结合的异氰酸酯物质在涂漆表面上保留多久。为了解决这个问题，汽车车身的废料部分由汽车车身车间油漆工按照常规做法进行油漆和干燥。用过的油漆在零件上喷涂了23次。干燥是通过在喷漆室中用加热灯加热或在车间中空气干燥来烘烤零件来完成的。在干燥后以规则的时间间隔对23个喷涂表面取样，以使用半定量SWYPE技术确定游离NCO基团的存在。还使用NIOSH方法5525对两个喷涂部件进行定量异氰酸酯分析。23个涂漆表面的几何平均固化时间为56.4小时（范围：0.8小时至32天）。与原始散装材料组成相似的未结合异氰酸酯物质在大多数取样的油漆表面上保持存在，对于典型油漆配方长达120小时，对于其他油漆配方长达1个月。在汽车车身修补中，聚氨酯涂料的实际固化可能是一个缓慢的过程。干燥后，未结合的异氰酸酯可能会长时间（数天至数周）留在喷漆汽车部件的表面上。这样的表面是一个认识不足的潜在来源的皮肤暴露于车身工人。
Two-component, polyurethane paints containing aliphatic isocyanates are widely used in autobody spray painting. Such isocyanates can cause asthma, and skin exposure may be an important route of sensitization and may contribute to the development of isocyanate asthma. Autobody workers are frequently in contact with recently painted, dried auto parts. It is not known how fast the newly painted car surfaces are fully cured, that is, for how long unbound, isocyanate species remain on painted surfaces after initial drying. To address this question, scrap sections of auto bodies were painted and dried by autobody shop painters following regular practice. Routinely used paints were sprayed 23 different times on the parts. Drying was accomplished by baking the part in a paint spray booth by heating it with a heat lamp or air drying in the shop. The 23 sprayed surfaces were sampled at regular time intervals after drying to determine the presence of free NCO groups using the semiquantitative SWYPE technique. Quantitative isocyanate analysis was also performed on two sprayed parts using NIOSH method 5525. Geometric mean curing time of 23 painted surfaces was 56.4 hr (range: 0.8 hrs to 32 days). Unbound isocyanate species of similar composition to the original bulk material remained present on the majority of sampled painted surfaces for up to 120 hours for typical paint formulations and for 1 month for others. The actual curing of polyurethane paints in autobody refinishing can be a slow process. Unbound isocyanates may remain on the surface of painted car parts for prolonged periods (days to weeks) after dried. Such surfaces are an under-recognized potential source of skin exposure to autobody workers.
各种皮肤和表面去污剂对脂肪族多异氰酸酯的有效性的实验室研究。
DOI：
10.1039/b503807c
发表时间：
2005
期刊：
Journal of environmental monitoring : JEM
影响因子：
--
作者：
Bello,Dhimiter;Woskie,SusanR;Streicher,RobertP;Stowe,MeredithH;Sparer,Judy;Redlich,CarrieA;Cullen,MarkR;Liu,Youcheng
通讯作者：
Liu,Youcheng
暴露于六亚甲基二异氰酸酯的汽车车身车间工人的亚临床免疫和生理反应。
影响因子：
3.5
作者：
Redlich,CA;Stowe,MH;Wisnewski,AV;Eisen,EA;Karol,MH;Lemus,R;Holm,CT;Chung,JS;Sparer,J;Liu,Y;Woskie,SR;Appiah-Pippim,J;Gore,R;Cullen,MR
通讯作者：
Cullen,MR