The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2012
Filed:
Jun. 19, 2008
Andrew M. Howe, Chesterton, GB;
Trevor J. Wear, Ely, GB;
Alan R. Pitt, Sandridge St Albans, GB;
Ian M. Newington, High Wycombe, GB;
John H. Hone, Chalfont St. Peter Gerrards Cross, GB;
Andrew M. Howe, Chesterton, GB;
Trevor J. Wear, Ely, GB;
Alan R. Pitt, Sandridge St Albans, GB;
Ian M. Newington, High Wycombe, GB;
John H. Hone, Chalfont St. Peter Gerrards Cross, GB;
Eastman Kodak Company, Rochester, NY (US);
Abstract
A thermally-responsive dispersant for an aqueous dispersion of positively- or negatively-charged or chargeable solid or liquid particulates, comprises a compound having an anchoring moiety linked to a thermally-responsive polymeric stabilizing moiety, other than a polyalkylene oxide, the polymeric moiety having a lower affinity for the surface than the anchoring group below the thermal transition temperature, the particulates being positively-charged or chargeable when the anchoring moiety contains an acid and/or hydroxy group and has a net acidity or neutrality and the particulates being negatively-charged or chargeable when the anchoring moiety has a basic group and has a net basicity, wherein the dispersion exhibits a change in sign from negative to positive and an increase in magnitude of a rheological property (viscosity at low shear and/or complex modulus at low amplitude oscillatory shear), on increasing the temperature from below to above the thermal transition temperature.