C - Chemistry – Metallurgy – 08 – B
Patent
C - Chemistry, Metallurgy
08
B
260/210, 134/53
C08B 5/14 (2006.01) C08B 15/00 (2006.01)
Patent
CA 1127151
ABSTRACT OF THE DISCLOSURE Cellulose sulfate esters are cross-linked with tetravalent metal ions at a threshold pH of 3.0 of higher. The cross-linked products have a higher aqueous viscosity and are more highly pseudoplastic than the precur- sor cellulose sulfate and may also exhibit a relatively high yeild point. The present invention thus provides a process for cross-linking of cellulose sulfate esters with tetravalent metal ions, to mixtures of cellulose sulfate esters and tetravalent metal ions that may be used in producing cross-linking of the cellulose sulfate, to a cellulose sulfate product which is cross-linked with tetravalent metal ions, and to aqueous composi- tions containing cellulose sulfate cross-linked with tetravalent metal ions. The products may be employed in forming thichkened aqueous comoposi- tions and cohesive gel-like compositions. The presence of other metallic ions, in addition to the tetravalent metal ions, is beneficial and enhances the viscosity increase produced by cross-linking of the cellulose sulfate with the tetravalent metal ions.
354636
Marcus & Associates
Schweiger Richard G.
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