Method of making pore-free molding with thick section

Details Method of making pore-free molding with thick section Method of making pore-free molding with thick section

B - Operations, Transporting

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B29C 45/00 (2006.01) B29C 67/24 (2006.01) C07C 13/15 (2006.01) C07C 13/28 (2006.01) C08G 61/08 (2006.01)

Patent

CA 2012078

Abstract of Invention Method of producing a polymer molding free of pores containing a thick section comprising mixing monomer charge containing at least one norbornene monomer having tricyclic or higher cyclic structure, a ring-opening catalyst system and a halogen source; introducing the monomer charge into a mold wherein temperature of the monomer charge is higher then temperature of the inside of the mold; polymerizing the monomer charge to a polymer molding while pressurizing the molding above the injection pressure; cooling the molding so that the temperature difference is less than 80°C between the maximum curing exothermal temperature and the glass transition temperature of the molding; and removing a pore free, rigid polymer molding from the mold wherein monomer conversion to polymer in the molding is in excess of 98%. 0029PApp.GAK

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