PUMPABLE AND THERMALLY EXPANDABLE FILLER COMPOSITIONS WITH PROLONGED OPEN TIME

    公开(公告)号:EP4461771A3

    公开(公告)日:2025-01-15

    申请号:EP24197510.1

    申请日:2021-09-29

    Abstract: The present application is directed to pumpable thermally foaming filler compositions based on combinations of a liquid epoxy resin and a polyvinyl chloride resin and/or an acrylic resin powder and at least one alkali metal salt of a fatty acid containing 16 C-atoms or 18 C-atoms, wherein the alkali metal is calcium or zinc. These pumpable filler materials provide the advantage that they can be expanded to provide foam with high expansion values after humidity exposure/storage.
    The present invention further describes methods for filling closed spaces with the pumpable thermally foaming filler composition as well as vehicle parts which are obtainable with the indicated methods.

    METHOD FOR BONDING PARTS WITH REDUCED READ-THROUGH DEFORMATION

    公开(公告)号:EP4303251A1

    公开(公告)日:2024-01-10

    申请号:EP22183452.6

    申请日:2022-07-06

    Abstract: Disclosed is a method for bonding two substrates comprising the sequential steps of
    - i) applying a pumpable thermally foaming filler composition on a first substrate S1, and
    - ii) placing the second substrate S2 so that the distance between the first substrate S1 and the second substrate S2 at the place of application of the pumpable thermally foaming filler composition is between 2 - 10 mm, and
    - iii) heating the first substrate S1 and the second substrate S2 to a temperature above the activation temperature of the foaming agent to foam the pumpable thermally foaming filler composition, wherein between step ii) and step iii) the applied pumpable thermally foaming filler composition is not in contact with the second substrate S2.
    The pumpable thermally foaming filler composition comprises at least one rubber, a polyvinylchloride resin and/or acrylic resin powder and a foaming agent. The method of bonding substrates with a thermally expandable composition provides a reduced bond line read through (BLRT) phenomenon.

    PUMPABLE AND THERMALLY EXPANDABLE FILLER COMPOSITIONS WITH PROLONGED OPEN TIME

    公开(公告)号:EP4461771A2

    公开(公告)日:2024-11-13

    申请号:EP24197510.1

    申请日:2021-09-29

    Abstract: The present application is directed to pumpable thermally foaming filler compositions based on combinations of a liquid epoxy resin and a polyvinyl chloride resin and/or an acrylic resin powder and at least one alkali metal salt of a fatty acid containing 16 C-atoms or 18 C-atoms, wherein the alkali metal is calcium or zinc. These pumpable filler materials provide the advantage that they can be expanded to provide foam with high expansion values after humidity exposure/storage.
    The present invention further describes methods for filling closed spaces with the pumpable thermally foaming filler composition as well as vehicle parts which are obtainable with the indicated methods.

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