公开(公告)号：US20220056255A1

公开(公告)日：2022-02-24

申请号：US17274862

申请日：2019-10-21

Applicant: SIKA TECHNOLOGY AG

Inventor： Artur MARFINATI ,  Diogo Emilio SILVERO

IPC: C08L23/22 ,  C08J9/00 ,  C08J9/10

Abstract: A thermally expandable composition, including (a) at least one polymer P, cross-linkable by a free-radical initiator, and (b) at least one solid butyl rubber BRu, and (c) at least one free-radical initiator, and (d) at least one blowing agent, and (e) at least one tackifier TA, whereby the cured expanded composition has a volume increase compared to the uncured composition of less than 1300%. The thermally expandable composition is able to provide good expansion behaviour and good adhesion on metal surfaces and is especially suitable for baffle and/or reinforcement elements, e.g. in automotive manufacturing.