ROOM TEMPERATURE CURABLE POLYORGANOSILOXANE COMPOSITION AND CURED PRODUCT THEREOF

• Main Authors: OTASHIRO KOKI, ONO KAZUHISA
• Format: Patent
• Language: English; Japanese
• Published: 20.02.2020
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

To provide a room temperature curable polyorganosiloxane composition which has excellent adhesion to various substrates and forms a cured product with an excellent elongation property.SOLUTION: A room temperature curable polyorganosiloxane composition contains: (A) 100 pts.mass of linear polyorganosiloxanes having two or more alkoxy groups in each molecule; (B1) 1-100 pts.mass of mica powder; (B2) 3-50 pts.mass of aerosol silica; (C) 0.5-15 pts.mass of an alkoxysilane represented by general formula RSi(OR), or a partial hydrolysis condensate thereof, where Ris monovalent hydrocarbon group, Ris an alkyl group or alkoxy substituted alkyl group, and a is 0, 1 or 2; and (D) 0.1-10 pts.mass of a titanium chelate catalyst.SELECTED DRAWING: None 【課題】各種基材への接着性に優れ、また、硬化物に優れた伸び特性を与える室温硬化性ポリオルガノシロキサン組成物の提供。【解決手段】（Ａ）一分子中に２つ以上のアルコキシ基を有する直鎖状のポリオルガノシロキサンの１００質量部、（Ｂ１）マイカ粉末の１〜１００質量部、（Ｂ２）煙霧質シリカの３〜５０質量部、（Ｃ）一般式：Ｒ１ａＳｉ（ＯＲ２）４−ａ（式中、Ｒ１は１価炭化水素基、Ｒ２はアルキル基又はアルコキシ置換アルキル基、ａは０、１、又は２である。）で表されるアルコキシシラン又はその部分加水分解縮合物の０．５〜１５質量部、及び（Ｄ）チタンキレート触媒の０．１〜１０質量部を含有する室温硬化性ポリオルガノシロキサン組成物。【選択図】なし