MOLD CONDITIONING RUBBER COMPOSITION

27A compression type, mold conditioning rubber composition for imparting release properties to a mold surface after removal of stains deposited during molding of a curing resin. The composition contains an unvulcanized rubber comprising an ethylene-propylene rubber and a butadiene rubber in a weight...

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Bibliographische Detailangaben
Hauptverfasser:	HIROAKI NOMURA, OSAMU SUNAGO, KIYOHITO HIROMITSU
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	27A compression type, mold conditioning rubber composition for imparting release properties to a mold surface after removal of stains deposited during molding of a curing resin. The composition contains an unvulcanized rubber comprising an ethylene-propylene rubber and a butadiene rubber in a weight mixing ratio of 90/10 to 50/50 as a base resin and a specific release agent. The unvulcanized rubber has a 90% cure time (optimum cure point) tc(90) of from 50 to 100 seconds or from 200 to 400 seconds at a mold temperature of 175FC and, after cure, an elongation of 80% to 800%, a tensile strength of 3 to 10 MPa, and a rubber hardness (durometer A hardness)io of 60 to 95. -IPOS 9E713 PM AO *