POLYOLEFIN ELASTOMER COMPOSITIONS AND METHODS OF MAKING THE SAME

• Main Authors: HERD-SMITH, Roland, GOPALAN, Krishnamachari, JI, Gending, LENHART, Robert J
• Format: Patent
• Language: English; French
• Published: 14.06.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; BLASTING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; GENERAL PROCESSES OF COMPOUNDING; HEATING; JOINTS OR FITTINGS FOR PIPES; LIGHTING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; MEANS FOR THERMAL INSULATION IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THEIR PREPARATION OR CHEMICAL WORKING-UP; THERMAL INSULATION IN GENERAL; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WEAPONS; WORKING-UP

An elastomeric article is provided that includes a composition having a silane-crosslinked polyolefin elastomer with a density less than 0.90 g/cm3. The elastomeric article can exhibit a compression set of from about 5.0 % to about 35.0 %, as measured according to ASTM D 395 (22 hrs @ 70 °C). The silane-crosslinked polyolefin elastomer can include a first polyolefin having a density less than 0.86 g/cm3, a second polyolefin having a crystallinity less than 40 %, a silane crosslinker, a grafting initiator, and a condensation catalyst. L'invention concerne un article élastomère qui comprend une composition contenant un élastomère polyoléfinique réticulé par un silane ayant une densité inférieure à 0,90 g/cm3. L'article élastomère peut manifester une déformation rémanente après compression, mesurée selon ASTM D 395 (22 h @ 70°C), d'environ 5,0 à environ 35,0 %. L'élastomère polyoléfinique réticulé par un silane peut comprendre une première polyoléfine ayant une densité inférieure à 0,86 g/cm3, une seconde polyoléfine ayant une cristallinité inférieure à 40 %, un agent de réticulation de type silane, un initiateur de greffage et un catalyseur de condensation.