C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 101/12 (2006.01) D21H 21/10 (2006.01) D21H 21/14 (2006.01) D21H 17/26 (2006.01) D21H 17/30 (2006.01) D21H 17/31 (2006.01) D21H 17/37 (2006.01) D21H 17/42 (2006.01) D21H 17/44 (2006.01)
Patent
CA 2331690
Aqueous compositions having advantageous rheological properties, preferably including any of enhanced yield stress, enhanced viscosity, and/or enhanced water retention, are disclosed. Included are low-viscosity compositions having high yield stress. The present invention also relates to processes for preparing and using the compositions. Compositions of the present invention comprise aqueous compositions of a polymer having a net ionic charge, and a viscosity promoter having an opposite net ionic charge. Compositions may also comprise a moderating agent to prevent precipitation and/or gelation.
Cette invention a trait à des compositions aqueuses présentant des caractéristiques rhéologiques avantageuses, de préférence notamment, une limite apparente d'élasticité en augmentation, une viscosité accrue et/ou une rétention de l'eau accrue. Il est également question de compositions à faible viscosité faisant montre d'une limite apparente d'élasticité élevée. L'invention concerne également des procédés de préparation de ces compositions ainsi que des techniques d'utilisation. Les compositions selon cette invention sont des compositions aqueuses comprenant un polymère ayant une charge ionique nette et un promoteur de viscosité dont la charge ionique nette est opposée à celle du polymère. Ces compositions peuvent aussi renfermer un agent de modération empêchant les phénomènes de précipitation et/ou de gélification.
Fetherstonhaugh & Co.
Hercules Incorporated
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