Crosslinked branched polyesters

US6592913B2 · kind B2 · utility

Assignee

• Eastman Chemical Company · US

Inventors

• Phillip Michael Cook · Kingsport, US
• Michael D. Hamlin · Brockport, US
• Lanny C. Treece · Kingsport, US
• George G. Mayfield · Kingsport, US
• Charles R. Tomlinson · Bristol, US

Key dates

• Filing date: Jul 30, 2002
• Grant date: Jul 15, 2003
• Expiry date: Jul 30, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2105/0002
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A gum base comprising a crosslinked branched polyester gel prepared from the process comprising: a) providing a first pre-gel composition having carboxyl end groups; b) providing a second pre-gel composition having hydroxyl end groups; c) removing either or both of the first and second pre-gel compositions from their respective reactors; d) combining the first and second pre-gel compositions to form a mixture; and e) processing the mixture in an extruder, a continuous processor, or a container thereby providing a crosslinked branched polyester gel.