ROOM TEMPERATURE CROSSLINKING, ONE COMPONENT SILICONE RUBBER FORMULATIONS WITH HYDROPHOBIC SILICAS

• Main Authors: KAWAMOTO KENICHI, SCHOLZ MARIO, PANZ CHRISTIAN, KEMPF MICHAEL
• Format: Patent
• Language: English; Korean
• Published: 06.11.2009
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; PREPARATION OF CARBON BLACK; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PURPOSE: A room temperature crosslinkable one-component silicone rubber composition is provided to ensure high fraction rate of filler such as hydrophobic silica, high whiteness, excellent storage stability, mechanical property and rheological property. CONSTITUTION: A room temperature crosslinkable one-component silicone rubber composition comprises hydrophobic silica 0.5-60 wt% and organopolysiloxane 40-99.5 wt% represented by formula 1: ZnSiR3-n-O-[SiR2O]x-SiR3-n-Z'n. The hydrophobic silica has carbon content more than 3.1 weight%, methanol humidity more than 60 %, reflectivity more than 94 %, BET/CTAB ratio more than 1, DBP absorption volume less than 230g/100g, BET surface area of 50-110 m^2/g, and CTAB surface area more than 30 m^2/g.