Crosslinking of XNBR with polyvalent epoxy compounds (PECs) for accelerator-free rubber films

Results in Materials Pub Date : 2024-10-29 DOI:10.1016/j.rinma.2024.100630

Taichi Ogawa , Junji Shibasaki , Atsushi Morinaga , Kaname Shibata , Akitsugu Suzuki , Yamato Takeuchi , Shoya Satake , Takuya Asada , Tomohiro Itagaki , Masahiro Fujiwara , Ikuya Shibata , Norihide Enomoto

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Abstract

The serious problems of skin inflammations (dermatitides) observed in the users of rubber gloves caused by type I or type IV hypersensitivity strongly require their new manufacturing methods free from these irritations. This paper reports our novel approach to the production of rubber gloves addressing these problems. A synthetic rubber latex, carboxylated nitrile butadiene rubber (XNBR), was crosslinked using polyvalent epoxy compounds (PECs) without the utilization of accelerators that cause those dermatitides. Although epoxy compounds are generally hydrolyzable in alkaline latex solution, optimally hydrophobic PECs, especially a PEC with three epoxy groups derived from trimethylolpropane, were found to be effective crosslinking reagents for producing high performance XNBR films. The methyl isobutyl ketone (MIBK)-water partition coefficient is an advantageous index to select suitable PECs in this process. The XNBR film produced by the PEC from trimethylolpropane had a high durability to simulated perspiration liquid and the pot-life of the mixed latex solution was longer than 7 days. The XNBR films produced by our novel process that contain no substances causing type I and type IV hypersensitivity are potentially free from the skin inflammations.

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用多价环氧化合物（PEC）交联腈基丁腈橡胶（XNBR）以制造无促进剂橡胶薄膜

橡胶手套使用者因 I 型或 IV 型超敏反应而引起的严重皮肤炎症（皮炎）问题强烈要求采用无刺激的新生产方法。本文报告了我们为解决这些问题而开发的新橡胶手套生产方法。我们使用多价环氧化合物（PECs）对合成橡胶胶乳--羧基丁腈橡胶（XNBR）进行了交联，而不使用会导致皮肤过敏的促进剂。虽然环氧化合物在碱性胶乳溶液中通常会水解，但研究发现，疏水性最佳的 PEC（尤其是一种由三羟甲基丙烷衍生出三个环氧基团的 PEC）是生产高性能 XNBR 薄膜的有效交联试剂。在该工艺中，甲基异丁基酮（MIBK）-水分配系数是选择合适 PEC 的有利指标。用三羟甲基丙烷 PEC 制备的 XNBR 薄膜对模拟汗液具有很高的耐久性，混合胶乳溶液的罐装寿命超过 7 天。我们的新工艺生产的氨丁橡胶薄膜不含导致 I 型和 IV 型超敏反应的物质，可能不会引起皮肤炎症。

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来源期刊

Results in Materials

CiteScore

5.30

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0.00%

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