Process for preparing high-performance pressure-sensitive hotmelt adhesive compositions and the use thereof for producing self-adhesive tapes

US6150017A · kind A · utility

Assignee

• BEIERSDORF AG · DE

Inventors

• Axel Burmeister · Hamburg, DE
• Heiko Leydecker · Neustadt, DE
• Jochen Stähr · Hannover, DE

Key dates

• Filing date: Jan 14, 1998
• Grant date: Nov 21, 2000
• Expiry date: Jan 14, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2852
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Pressure-sensitive hotmelt adhesive composition based on non-thermoplastic elastomers, obtained by PA1 a) preparing, as the preliminary batch, a composition comprising the elastomers and one or more of the following additives such as fillers, anti-ageing agents, plasticizers and tackifier resins in an intensively shearing, intensively cooling mixer and without solvent, the composition having a final temperature of from 100.degree. C. to 160.degree. C., PA1 b) mixing and homogenizing the preliminary batch in a second mixer with one or more of the following additives such as fillers, anti-ageing agents, plasticizers and tackifier resins, without solvent, the composition having a final temperature of from 100.degree. C. to 160.degree. C., where the total residence time of the composition at temperatures over 100.degree. C. does not exceed a figure of 6 minutes, so that the resulting hotmelt adhesive composition has a viscosity of more than 900 Pa*s, in particular from 900 Pa*s to 1200 Pa*s, at 130.degree. C. and at a shear gradient of 100 s.sup.-1.