Invention Grant
- Patent Title: 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
- Patent Title (中): 制造发泡聚合物组合物的方法，优选压敏粘合剂组合物，用于进行该方法的装置，挤出物和自粘带
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Application No.: US14273144Application Date: 2014-05-08
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Publication No.: US09499676B2Publication Date: 2016-11-22
- Inventor: Axel Burmeister , Franziska Czerwonatis
- Applicant: tesa SE
- Applicant Address: DE Norderstedt
- Assignee: tesa SE
- Current Assignee: tesa SE
- Current Assignee Address: DE Norderstedt
- Agency: Norris McLaughlin & Marcus, P.A.
- Main IPC: B05D5/10
- IPC: B05D5/10 ; C08J9/32 ; B29B7/48 ; B29C47/42 ; B29C47/00 ; C08J9/00 ; C08K3/04 ; C09J5/08 ; C09J7/02 ; B29C44/04 ; B29C47/80 ; B29C47/82 ; B29C47/84 ; B29K105/00 ; B29K105/04 ; B29C47/02
Abstract:
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.
Public/Granted literature
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