Methods of controlling properties in multimodal systems

Details Methods of controlling properties in multimodal systems Methods of controlling properties in multimodal systems

2006-09-21

2011-12-06

Teskin, Fred M (Department: 1762)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Effecting a change in a polymerization process in response...

C700S269000, C702S030000

Reexamination Certificate

active

08071699

ABSTRACT:
The invention is directed to a polymerization system and method of controlling resin properties during the production of bimodal and multimodal polymer compositions using at least one manipulated variable to minimize dynamic deviations from polymer characteristics. In particular embodiments, the method of control includes determining a property of the resin based on a current and/or previous values or estimates or process variables or polymer characteristics. In this manner the control actions serve to reduce process upsets or facilitate in transitioning to a new product or grade to reduce the amount of off-grade resin material produced during transition or during steady state manufacture.

REFERENCES:
patent: 6093211 (2000-07-01), Hamielec et al.
patent: 2004/0254309 (2004-12-01), Parrish et al.
The International Search Report and Written Opinion, May 23, 2007.

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