...The drying of urushi involves polymerization due to the autoxidation of the unsaturated bonds in the side chains and a reaction due to intermolecular condensation of the catechol portion, which results in a dry coating film that combines soft and hard molecular structures, which, combined with the formation of a higher-order structure with other components, makes for a tough coating film. The main component of Chinese urushi is also urushiol, but the main component of Annam urushi is laccol, and that of Burmese urushi is thitsiol. It can cause skin irritation, although not as severe as raw urushi. ... *Some of the terminology explanations that mention "thitsiol" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ウルシの乾燥はこの側鎖の不飽和結合の自動酸化による重合や,カテコール部分の分子間縮合による反応で,乾燥塗膜が分子的に軟構造と硬構造の組み合わさった構造をとることが,他成分との高次構造の形成と相まって,強靱な塗膜となる因となっている。中国産ウルシの主成分もウルシオールであるが,アンナンウルシの主成分はラッコールlaccol,ビルマウルシはチチオールthitsiolである。生漆ほどではないが皮膚に炎症を起こさせる。… ※「thitsiol」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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