Process for preparing water-soluble polymer gels

Details Process for preparing water-soluble polymer gels Process for preparing water-soluble polymer gels

C - Chemistry, Metallurgy

08

L

C08L 101/14 (2006.01) C08F 2/01 (2006.01) C08F 4/04 (2006.01) C08F 4/40 (2006.01) C08J 3/075 (2006.01)

Patent

CA 2635152

A process for preparing high molecular weight water-soluble polymer gels having relatively narrow molecular weight distributions is disclosed. An aqueous reaction mixture comprising a solution of a water-soluble vinyl monomer and a suitable catalyst system is polymerized in a reactor comprising a channel reactor with sealed removable lid in the substantial absence of oxygen. The sealed removable lid is preferably flexible and sealed with a flexible zipper. The polymer gels are formed into particles or pellets and coated. The coating allows the gel to flow or be pumped and metered. Gel particles or pellets may also be dried to granular product.

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