Low molecular weight cellulose mixed esters and their use as low viscosity binders and modifiers in coating compositions

US8039531B2 · kind B2 · utility

Assignee

• Eastman Chemical Company · US

Inventors

• Michael Charles Shelton · Kingsport, US
• Jessica Dee Posey-Dowty · Kingsport, US
• Luis Guillermo Rios Perdomo · Kingsport, US
• Daniel Wayne Dixon, Jr. · Church Hill, US
• Paul Lee Lucas · Jonesborough, US
• Alan Kent Wilson · Kingsport, US
• Kenneth Raymond Walker · Wigan, GB
• Jonathan Edward Lawniczak · Kingsport, US
• Roy Glenn Foulk · Kingsport, US
• Hieu Duy Phan · Antioch, US
• Charlie Carroll Freeman, Jr. · Rogersville, US
• John Douglas Booton · Bristol, US

Key dates

• Filing date: Mar 30, 2006
• Grant date: Oct 18, 2011
• Expiry date: Dec 4, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09D201/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Cellulose mixed esters are disclosed having low molecular weights and low degrees of polymerization. These new cellulose mixed esters include cellulose acetate propionate and cellulose acetate butyrate. The esters exhibit solubility in a wide range of organic solvents with minimal viscosity increase, are compatible with a wide variety of resins, and are useful in coatings and inks compositions as binder resins and rheology modifiers.