Process for producing a syntactically foamed polymer composition, preferably a pressure-sensitive adhesive composition, apparatus for carrying out the process, extrudate and self-adhesive tape

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United States of America Patent

PATENT NO 9499676
APP PUB NO 20140335338A1
SERIAL NO

14273144

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Abstract

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Process for producing a syntactically foamed polymer composition, comprising

    a) introducing expandable microspheres into a matrix material and mixing in a mixing machine,b) expanding the microspheres,c) the temperature distribution in the mixing machine being inhomogeneous in a plane perpendicular to the transport direction of the machine,d) maintaining the temperature of a first surface bounding the mixing space of the mixing machine, in a plane perpendicular to the transport direction of the mixing machine, at a temperature sufficient for the polymer composition containing the microspheres coming into contact with such first bounding surface to reach a temperature sufficient for commencement and continuation of expansion,e) maintaining a second surface bonding the mixing space in the same plane at a temperature sufficiently low for the polymer composition containing the microspheres coming into contact with it, not to reach a temperature sufficient for commencement and continuation of expansion.

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Patent Owner(s)

Patent OwnerAddress
TESA SEHUGO-KIRCHBERG-STRASSE 1 NORDERSTEDT 22848

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Burmeister, Axel Hamburg, DE 46 321
Czerwonatis, Franziska Hamburg, DE 12 30

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