ROOM TEMPERATURE-CURABLE POLYORGANOSILOXANE COMPOSITION

• Main Author: OBA TOSHIO
• Format: Patent
• Language: English
• Published: 04.07.2013
• 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

PROBLEM TO BE SOLVED: To provide a room temperature-curable polyorganosiloxane composition with good adhesion durability.SOLUTION: This room temperature-curable polyorganosiloxane composition includes (A) 100 pts.mass of polyorganosiloxane whose molecular chain terminal is blocked with a hydroxy group or hydrolyzable group, and which has viscosity at 23°C of 20-1,000,000 mPa s, (B) a principal agent comprising 10-200 pts.mass of a filler, and (C) a curing agent. As the curing agent of the component (C), an alkoxysilane of general formula (I) and an amino-functional alkoxysilane of general formula (II) are contained, but no metal-containing curing catalyst is contained. General formula (I): RSi(OR), where Ris a ≥4C alkyl group. General formula (II): (RO)RmSi-R-NH-R-SiR(OR), where Rand Rare same or different from each other, each representing a (substituted) monovalent hydrocarbon group, and m and l are each an integer of 1-3.