Patent · US Active

Process for preparing a thermally reactive pressure-sensitive adhesive

US8680178B2 · kind B2 · utility

0Cited by

2References

8Claims

0Family size

Assignee

tesa SE · DE

Inventors

Andreas Meier · Wilhermsdorf, DE
Matthias Seibert · Hamburg, DE
Sabine Thormeier · Hamburg, DE
Karsten Seitz · Oberursel, DE

Key dates

Filing date	Dec 21, 2009
Grant date	Mar 25, 2014
Priority date	—
Expiry date	Dec 31, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L2666/16
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The in-line repair operations in the automotive industry require high-temperature masking tapes which satisfy a particular profile of requirements. Hence such masking tapes must be temperature-stable and must have a high crosslinking potential. Masking tapes employed are tapes coated with thermally crosslinking natural rubber (NR) adhesives which have a crosslinker resin/phenolic resin component.Thermally reactive pressure-sensitive adhesives of this kind are prepared by a process comprising a non-thermoplastic rubber constituent of the pressure-sensitive adhesive and a crosslinker system, the crosslinker system comprising a promoter component and as crosslinking component a reactive phenolic resin, where, in the process, the rubber constituent and a first component of the crosslinker system are mixed homogeneously in a mixing assembly, at a first processing temperature of the mixing assembly, to give a premix, a premix temperature being established in the premix; subsequently the premix is cooled from the premix temperature to a final composition temperature which is lower than the first premix temperature; and lastly the second component of the crosslinker system is added to the …

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.