CAST BULK POLYMERIZING METHOD

PURPOSE:To produce precisely and inexpensively, by a method wherein a foaming or sintering resin material which is hard to be impregnated with a casting monomer, prepolymer or a mixture of them is made into a gasket and after both end surfaces of a cell set are sealed, the casting material is cast a...

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Bibliographische Detailangaben
Hauptverfasser:	TAWARA NOBUYOSHI, SHUDO TAKUZO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS 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 WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	PURPOSE:To produce precisely and inexpensively, by a method wherein a foaming or sintering resin material which is hard to be impregnated with a casting monomer, prepolymer or a mixture of them is made into a gasket and after both end surfaces of a cell set are sealed, the casting material is cast and solidified. CONSTITUTION:A gasket 3 made of foamed polyethylene is placed between two panes of glass 2, 2, a gap (d) between both the panes of glass are made into a cell set 1 having a polymerization chamber 4 and fixed by clampes 5, 5. Then predeaerated sirup R of methyl metacrylate is cast within the polymerization chamber 4 and after a temperature rise gradually from a room temperature, the same is cooled down gradually to the room temperature, finally the cell set is dismembered, a cured thin plate is taken out, removal and grinding are performed and then acrylic thin plate is obtained. Production can be performed precisely and inexpensively by this method.