Water-based adhesives containing thermally-inhibited starches

US5641349A · kind A · utility

Assignee

• National Starch and Chemical Investment Holding Copporation · US

Inventors

• Timothy C. Koubek · Clinton, US
• Russell J. Nesiewicz · Somerville, US
• Michael T. Philbin · Hopewell, US
• Joseph P. Wieczorek · Lake Orion, US
• Chung-Wai Chiu · Westfield, US
• Eleanor Schiermeyer · Bound Brook, US
• David J. Thomas · Woodbury, US
• Manish B. Shah · Willingboro, US
• Daniel B. Solarek · Somerville, US

Key dates

• Filing date: Jan 31, 1996
• Grant date: Jun 24, 1997
• Expiry date: Jan 31, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08B30/12
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Thermally-inhibited starches and flours are used in conventional water-based adhesives such as corrugating, cigarette, remoistenable, kraft adhesives. The starches or flours are thermally-inhibited by dehydrating the starch to anhydrous or substantially anhydrous and then heat-treating the starch or flour for a time and at a temperature sufficient to inhibit the starch and improve its viscosity stability. The starch or flour may be thermally or non-thermally dehydrated (e.g., by alcohol extraction or freeze-drying). Preferably, the pH of the starch is adjusted to at least a neutral pH prior to the dehydration.