MANUFACTURING METHOD OF SILICONE RESIN COATING SILICONE ELASTOMER PARTICLE

• Main Authors: YOSHIZAWA TAKESHI, WAKITA MARI, TANIGUCHI HIROKO, KANZAKI YASUE
• Format: Patent
• Language: English; Japanese
• Published: 09.07.2020
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; HUMAN NECESSITIES; HYGIENE; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

To provide a manufacturing method of silicone resin coating silicone elastomer particles, capable of easily manufacturing in an industrial scale, and having an easy and simple manufacturing process.SOLUTION: A manufacturing method of silicone resin coating silicone elastomer particles includes: emulsifying in water a mixture which contains (a) an organopolysiloxane having at least two 2C-20C alkenyl groups in the molecule, (b) an organohydrogenpolysiloxane, and (d) a hydrolyzable silane; hardening the product in the presence of (c) a hydrosilylation reaction catalyst so as to obtain spherical silicone elastomer particles; and coating the surfaces of the silicone elastomer particles with a silicone resin as a condensation reaction product of (d) the hydrolyzable silane.SELECTED DRAWING: Figure 1 【課題】工業的スケールで容易に生産することができ、かつ、その製造プロセスが平易かつ簡便であるシリコーン樹脂被覆シリコーンエラストマー粒子の製造方法を提供する。【解決手段】（ａ）炭素数２〜２０のアルケニル基を分子内に少なくとも２つ有するオルガノポリシロキサン、（ｂ）オルガノハイドロジェンポリシロキサン、および（ｄ）加水分解性シランを含む混合物を、水中に乳化し、（ｃ）ヒドロシリル化反応触媒の存在下で硬化させ、球状のシリコーンエラストマー粒子を得、さらに、シリコーンエラストマー粒子の表面を（ｄ）加水分解性シランの縮合反応物であるシリコーン樹脂により被覆することを特徴とする、シリコーン樹脂被覆シリコーンエラストマー粒子の製造方法。【選択図】図１