…These methods are cheap and simple, but the waterproofing effect is temporary and the fabric must be reprocessed after washing. Permanent waterproofing agents include reactive waterproofing agents and silicone resins. Reactive waterproofing agents are composed of a long-chain alkyl group and a functional group that reacts with the hydroxyl group of cellulose to form a bond. Depending on the type of reactive functional group, they are classified into ethylene urea type, pyridinium salt type, ketene dimer type, etc. *Some of the terminology that refers to "permanent waterproofing agent" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これらの方法は,安価で簡単な加工法であるが,防水効果は一時的であり,洗濯したときには再加工する必要がある。 永久防水加工剤には,反応性防水加工剤とケイ素樹脂がある。反応性防水加工剤は,長鎖アルキル基と,セルロース水酸基と反応して結合をつくる官能基とが結合した構造のものであって,反応性の官能基の種類によって,エチレン尿素系,ピリジニウム塩系,ケテンダイマー系などに分類される。… ※「永久防水加工剤」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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