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US 7,829,640 B2Granted
Recirculation loop reactor bulk polymerization process
AssigneeIntertape Polymer Corp.
InventorsMark D. Barbieri, Richard W. St. Coeur, John K. Tynan, Jr., Mark A. Lewandowski
Life of this patent
Estimating the term…
Abstract
A process for producing polymer and more particularly adhesive using a recirculating loop reactor. In one embodiment the reactor includes one or more mixers to mix feed stock with the polymerized material recirculating in the reactor. In another embodiment a planetary roller extruder (PRE) may be used for this purpose. In still another embodiment, a combination of one or more static mixers and one or more PREs may be used.
Claims21
A process including the steps of:
- a) introducing a feed stock containing at least one monomer and at least one activatable initiator into a recirculating loop reactor having partially polymerized material recirculating therein to form a reaction mixture;
- b) heating the reaction mixture to at least the activation temperature of the initiator to produce a polymerized intermediate;
- c) recirculating a portion of the polymerized intermediate through the loop reactor while directing a remaining portion of the polymerized intermediate into a removal stream;
- d) cooling the recirculating portion of the intermediate to a temperature below the activation temperature of the initiator;
- e) mixing the cooled recirculating portion of the intermediate with the feed stock;
- and
- f) subjecting the remaining portion of the polymerized intermediate to further reaction to form polymerized product.
4 more elements
A process comprising the steps of:
- a) introducing a feed stock containing at least one monomer and at least one activatable initiator into a planetary roller extruder located in a recirculating loop reactor having a partially polymerized material circulating therein to form a reaction mixture;
- b) heating the reaction mixture from step a) to at least the activation temperature of the initiator to polymerize at least one monomer in the feed stock with the partially polymerized material to form a partially polymerized intermediate;
- c) recirculating a portion of the partially polymerized intermediate from step b) through a loop reactor while;
- d) directing a remaining portion of the partially polymerized intermediate into a stream for removal from the loop reactor;
- e) cooling the recirculating portion of the partially polymerized intermediate from step (c) below the activation temperature of the initiator;
- f) mixing a portion of the partially polymerized intermediate from step c) with additional feed stock to further polymerize the monomer and the partially polymerized intermediate;
- and
- g) subjecting the remaining portion of the polymerized intermediate to additional reaction to form a polymerized product.
5 more elements
A recirculation loop reactor process including the steps of:
- a) introducing a feed stock containing at least one monomer and at least one activatable initiator into a loop reactor having a partially polymerized material recirculating therethrough to form a polymerizable mixture;
- b) heating the mixture from step a) to at least the activation temperature of the initiator in the reaction to polymerize the monomer and the partially polymerized material and form a polymerized intermediate;
- c) circulating a portion of the polymerized intermediate from step b) through a loop reactor while cooling it to a temperature below the activation temperature of the initiator at a predetermined flow;
- d) mixing the cooled circulating material from step c) with additional feed stock to further polymerize the monomer and the polymerized intermediate;
- e) directing a remaining portion of the further polymerized intermediate into a stream for removal from the loop reactor;
- and
- f) subjecting the remaining portion of the polymerized intermediate to an additional reaction in a planetary roller extruder to reduce the unreacted monomer and form a polymerized product.
4 more elements
A polymerization reactor comprising a feed stock containing:
- a supply of at least one monomer and at least one initiator,
- a reactor loop including at least one mixer for mixing the feed stock with a stream of polymerized intermediate recirculating in the reactor loop, and
- a removal stream for removing polymerized product from the reactor;
- wherein the reactor loop includes a junction where the removal stream diverges from the stream of polymerized intermediate and includes a mixer for cooling located in the recirculating stream between the junction and the at least one mixer that is mixing the feed stock with the stream of recirculating polymerized intermediate to cool the polymerized intermediate below an initiation temperature;
- wherein the removal stream includes at least a static mixer or a dynamic mixer for further reacting the polymerized intermediate to form a polymer product.
2 more elements
A polymerization reactor comprising a feed stock containing:
- a supply of at least one monomer and at least one initiator,
- a reactor loop including at least one mixer for mixing the feed stock with a stream of polymerized intermediate recirculating in the reactor loop, and
- a removal stream for removing polymerized product from the reactor;
- wherein the removal stream includes at least a static mixer or a dynamic mixer for further reacting the polymerized intermediate to form a polymer product;
- wherein at least one mixer is a dynamic mixer.
2 more elements
Dependencies are inferred from the claim text.