PROCESS FOR THE PREPARATION OF A COPOLYMER OF MALEIC ANHYDRIDE AND AN ALKYL VINYL ETHER, COPOLYMERS OF MALEIC ANHYDRIDE AND AN ALKYL VINYL ETHER AND AN APPARATUS

Title:

PROCESS FOR THE PREPARATION OF A COPOLYMER OF MALEIC ANHYDRIDE AND AN ALKYL VINYL ETHER, COPOLYMERS OF MALEIC ANHYDRIDE AND AN ALKYL VINYL ETHER AND AN APPARATUS

Document Type and Number:

WIPO Patent Application WO2003064482

Kind Code:

A3

Abstract:

Process for the preparation of a copolymer of maleic anhydride and an alkyl vinyl ether, comprising the steps of supplying maleic anhydride and the alkyl vinyl ether and an initiator, together forming a feed flow, through an inlet to a reactor wherein maleic anhydride and the alkyl vinyl ether react to a copolymer of maleic anhydride an alkyl vinyl ether thereby forming a reaction mixture with the maleic anhydride, the alkyl vinyl ether and the initiator characterized in that the process is a continuous process and the reactor is a loop reactor wherein the reaction mixture is internally circulated, whereby this reaction mixture arrives at the inlet before the maleic anhydride and alkyl vinyl ether have completely reacted while a remainder of initiator is still present. The invention further relates to copolymer of maleic anhydride and alkyl vinyl ether, including hydrolyzed or alcoholized copolymers, characterized in that a molecular weight distribution, expressed as Mw/Mn, is less than 2. The invention also relates to an apparatus for conducting the process of the invention.

Inventors:

VAN BENTHEM RUDOLFUS ANTONIUS (NL)
FRIEDERICHS JOSEPH PETRONELLA (NL)
MOREAU DOMINIQUE JEAN JOSEPH S (NL)

Application Number:

PCT/NL2003/000044

Publication Date:

April 01, 2004

Filing Date:

January 22, 2003

Export Citation:

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Assignee:

DSM IP ASSETS BV (NL)
VAN BENTHEM RUDOLFUS ANTONIUS (NL)
FRIEDERICHS JOSEPH PETRONELLA (NL)
MOREAU DOMINIQUE JEAN JOSEPH S (NL)

International Classes:

B01F7/00; B01F15/00; B01J19/18; B01J19/24; C08F8/12; C08F8/14; C08F216/18; C08F222/06; (IPC1-7): C08F222/06; C08F216/18; C08F8/12; C08F8/14; B01J19/24; B01J19/18

Domestic Patent References:

WO1997021427A1

1997-06-19

Foreign References:

EP0919577A1	1999-06-02
DE4236058A1	1994-04-28

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