CONRROLLED REALEASE COOLING ADDITIVE COMPOSITION

WIPO Patent Application WO2002083289

A9

A controlled-release additive composition for use in aqueous systems. The composition comprises a core containing at least one additive component and a polymeric coating encapsulating said core. The controlled-release cooling additive composition slowly releases the additive components to aqueous system, thereby delivering an effective concentration level of additive components over an extended period. A liquid replacement system (10) is provided for introducing additives to an open recirculating system (18) or a closed loop boiler water system in a controlled manner. The liquid replacement system (10) comprises a make-up line (12) and an additive system (14) disposed therein. A make-up liquid enters into the make-up line (12) where the additive system (14) is structured to provide a controlled release of an additive to the make-up liquid which carries the additives into the open recirculating system (18) or a closed loop boiler water system.

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BLAKEMORE THOMAS
CHEN YU-SEN
KELLY DENNIS

PCT/US2002/022507

March 20, 2003

February 12, 2002

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DOBER CHEMICAL CORP (US)

B01J2/00; B01J2/28; C02F1/00; C02F1/50; F28F19/00; C02F5/10; C02F5/14; C08K5/00; C08L1/28; C08L31/04; C08L33/04; C08L101/00; C09K5/10; F28F19/01; C02F1/68; C02F5/00; (IPC1-7): B01J13/02; B32B27/30; C02F5/10; F28C1/00

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