Akzo Nobel N.v.

Akko Nobel N.v.

Berend Jan Dijk

Jan Gerardus Batelaan

Auke Gerardus Talma

Rabindra Nath Datta

Peter Marten Van Der Horst

Andre Steenbergen

Arie Jacob De Hoog

Conrardus Hubertus Theeuwen

An anionic cellulose ether obtainable by a process comprising reacting an alkali metal cellulose with one or more reagents A selected from the group consisting of haloacetic acids, alkali metal haloacetates, alkali metal vinyl sulfonates, vinyl sulfonic acid, and precursors thereof, and one or more reagents B having the formula R &mdash;(OCH CH(R )) -P, wherein R represents hydrogen or a methyl group; n is 0-2; P represents a glycidyl ether group, a 1,2-epoxy group or a precursor thereof, if P represents a glycidyl ether group, R represents a linear C -C alkyl group, optionally containing an oxygen atom, a phenyl group, or a benzyl group, and if P represents a 1,2-epoxy group, R represents a linear C -C alkyl group, optionally containing an oxygen atom. Preferably, reagent A is chloroacetic acid and reagent B is n-butyl glycidyl ether. The invention also relates to the use of said anionic cellulose ether as an associative thickener, rheology modifier or stabilizer.

Anionic cellulose ethers having temperature-dependent associative properties

A hydrophobically modified anionic cellulose ether obtainable by a process comprising reacting an alkali metal cellulose with at least three alkylating reagents A, B, and C. Reagent A is selected from the group of haloacetic acids, alkali metal haloacetates, alkali metal vinyl sulfonates, and vinyl sulfonic acid. Reagent B has the formula R &mdash;(OCH CH(R )) &mdash;P, wherein R represents a C -C group, R is hydrogen or a methyl group, n is 0-2, and P represents a glycidyl ether group, a 3-halo-2-hydroxypropyl ether group, a 1,2-epoxy group, or a halide, and reagent C has the formula R &mdash;(OCH CH(R )) &mdash;P, wherein R represents a C -C group, m is 0-10, and R and P have the meaning as described above.

Hydrophobically modified anionic cellulose ethers

Sulfur-vulcanized rubber compositions comprising substituted succinimide

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Leusden, Netherlands

Berend Jan Dijk