Process for the production of improved PSA's

US6107382A · kind A · utility

Assignee

• Avery Dennison Corporation · US

Inventors

• Charles R. Williams · Greenwood Village, US
• Colin C. Smith · Mill Hall, US
• James R. Bodwell · West Chester, US
• James P. Akeley · Mill Hall, US
• Ivan Lee · Arcadia, US

Key dates

• Filing date: Jul 31, 1997
• Grant date: Aug 22, 2000
• Expiry date: Jul 31, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/582
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

General purpose inherently tacky acrylic pressure sensitive adhesive polymers formed of alkyl acrylates, vinyl esters, and saturated carboxylic acids, having improved properties, a lower residual monomer content are formed by a sequential emulsion polymerization process in which 40 to 70 percent, typically 45 percent, of the monomers are incrementally added to a reactor as a first charge containing substantially all of the vinyl esters, the balance of the monomers being fed in a second incremental charge.