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1. (WO2013110773) FILTRATE CONTROL AGENTS IN SOLID FORM

Pub. No.:    WO/2013/110773    International Application No.:    PCT/EP2013/051461
Publication Date: Fri Aug 02 01:59:59 CEST 2013 International Filing Date: Sat Jan 26 00:59:59 CET 2013
IPC: C04B 24/26
C08F 8/28
C08F 16/06
C08J 3/24
C08K 5/07
C09K 8/12
C09K 8/487
C09K 8/62
Applicants: RHODIA OPERATIONS
Inventors: CADIX, Arnaud
Title: FILTRATE CONTROL AGENTS IN SOLID FORM
Abstract:
The present invention relates to a process for preparing control agents for applications in the petroleum field, where a polymer bearing -OH, amine and/or amide functions, which is in the form of a divided solid, is reacted with at least one crosslinking agent bearing at least two -R groups capable of reacting with the -OH, amine or amide groups, under conditions where said polymer remains in solid form and where said crosslinking agent is at least partly in vapour form. The invention also relates to the control agents obtained in solid form according to this process, and also to the mixtures of these solid agents with other additives, which can be used in particular for the preparation of cement grout for oil extraction.