Abstract: A continuous polymerization apparatus uses at least a first reactor and a second reactor (10, 20). Each of the reactors (10, 20) comprises a supply port (11a, 21a) and an effluent port (11b, 21b). The supply port (11a) of the first reactor (10) is connected to supply sources (1, 3) of a raw material monomer and a polymerization initiator, and the effluent port (11b) thereof is connected to the supply port (21a) of the second reactor (20) by a connection line (15a). The connection line (15a) is combined with a replenishing line (15b) through an injection valve (50) at a combining part. The injection valve (50) comprises, in a full closure state thereof, a clearance that may cause a fluid comprising at least the raw material monomer to flow from the replenishing line (15b) to the connection line (15a).

Abstract: A continuous polymerization apparatus uses at least a first reactor and a second reactor (10, 20). Each of the reactors (10, 20) comprises a supply port (11a, 21a) and an effluent port (11b, 21b). The supply port (11a) of the first reactor (10) is connected to supply sources (1, 3) of a raw material monomer and a polymerization initiator, and the effluent port (11b) thereof is connected to the supply port (21a) of the second reactor (20) by a connection line (15a). The connection line (15a) is combined with a replenishing line (15b) through an injection valve (50) at a combining part. The injection valve (50) comprises, in a full closure state thereof, a clearance that may cause a fluid comprising at least the raw material monomer to flow from the replenishing line (15b) to the connection line (15a).

Abstract: An apparatus for continuous polymerization with a simple constitution to produce a polymer having a high quality, as well as a method for producing the polymer using the apparatus, are provided. The apparatus comprises a vessel; a means for supplying a monomer to the vessel; a means for supplying a polymerization initiator to the vessel; a means for detecting a temperature in the vessel; a means for regulating a temperature of an outer wall surface of the vessel so as to have a preset temperature; and a means for controlling a supply flow rate of the monomer and/or the polymerization initiator to the vessel by the monomer supply means and/or the initiator supply means so that the temperature in the vessel becomes substantially the same temperature as the preset temperature.

Abstract: The present invention provides a process for stopping continuous polymerization in which a raw material monomer is polymerized in a reaction vessel by continuously feeding the raw material monomer and a polymerization initiator in the reaction vessel, which process comprises the steps of, in the midst of the polymerization reaction, stopping feeding of the polymerization initiator to the reaction vessel with keeping stirring in the reaction vessel; and adjusting a feed flow rate of the raw material monomer to the reaction vessel so that a temperature T1 (° C.) in the reaction vessel and a temperature T2 (° C.) of an external wall thereof satisfy a relation represented by the formula: T2?20?T1?T2+20.

Abstract: The present invention provides a process for stopping continuous polymerization in which a raw material monomer is polymerized in a reaction vessel by continuously feeding the raw material monomer and a polymerization initiator in the reaction vessel, which process comprises the steps of, in the midst of the polymerization reaction, stopping feeding of the polymerization initiator to the reaction vessel with keeping stirring in the reaction vessel; and adjusting a feed flow rate of the raw material monomer to the reaction vessel so that a temperature T1 (° C.) in the reaction vessel and a temperature T2 (° C.) of an external wall thereof satisfy a relation represented by the formula: T2?20?T1?T2+20.

Abstract: An apparatus for continuous polymerization with a simple constitution to produce a polymer having a high quality, as well as a method for producing the polymer using the apparatus, are provided. The apparatus comprises a vessel; a means for supplying a monomer to the vessel; a means for supplying a polymerization initiator to the vessel; a means for detecting a temperature in the vessel; a means for regulating a temperature of an outer wall surface of the vessel so as to have a preset temperature; and a means for controlling a supply flow rate of the monomer and/or the polymerization initiator to the vessel by the monomer supply means and/or the initiator supply means so that the temperature in the vessel becomes substantially the same temperature as the preset temperature.