アルキルシラン・建設用シラン

浸透性のアルキルアルコキシシラン撥水剤はコンクリート、れんが、石材に浸透した後、加水分解して鉱物表面と結合し、細孔壁を疎水層で覆って毛管吸水を低減します。 Methyltrimethoxysilane (CAS 1185-55-3) is the workhorse small-molecule silane for this; its low molecular weight drives deep penetration into dense substrates. Specify a monomeric alkyl silane where penetration depth matters more than a surface film, such as vertical concrete facades and bridge decks.

Cure chemistry sets the handling envelope. Methoxysilanes such as methyltrimethoxysilane react and condense quickly but release methanol as the byproduct; the ethoxy analog, methyltriethoxysilane, cures more slowly and releases ethanol instead. Octyltriethoxysilane carries a longer C8 alkyl chain for higher water repellency on porous masonry. The trade-off is real: these silanes need a dry-enough substrate and adequate cure time before water exposure, so plan application around weather and substrate moisture instead of treating them as instant-dry.

A second group in this family is built for sealants instead of substrate treatment. Acetoxysilanes (ethyltriacetoxysilane, methyltriacetoxysilane) act as moisture-cure crosslinkers in RTV silicone sealants and release acetic acid on cure, while methyltris(methylethylketoxime)silane is an oxime crosslinker for lower-corrosivity systems on sensitive substrates. (3-Chloropropyl)trimethoxysilane is a chloroalkyl coupling silane for specialty surface modification. Match the crosslinker to the substrate: choose oxime or alkoxy chemistries where acetic-acid corrosion of metal or concrete is a concern.

• コンクリート、れんが、天然石ファサード向けの浸透性撥水処理
• 橋梁床版、駐車場構造物、インフラコンクリートの保護
• 建築工事における組積造への表面塗布型撥水処理
• RTVシリコーンおよびハイブリッドシーリング材用の湿気硬化型架橋剤
• 鉱物フィラーおよび基材の接着促進と表面改質

• Methyltrimethoxysilane u2014 PubChem
• Methyltriethoxysilane — PubChem
• Octyltriethoxysilane (triethoxyoctylsilane) — PubChem
• Methyltriacetoxysilane — PubChem