Adhesive composition having improved delta-alpha tolerance, associated joining method and obtainable composite workpiece
A joint method and adhesive technology, which is applied in the joint of composite workpieces and in the field of composite workpieces, can solve problems such as temperature limitations, achieve the effects of reducing material stress, improving Δ-α tolerance, and improving material properties
Active Publication Date: 2018-01-02
VOLKSWAGEN AG
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
However, the use of elastomer-modified thermosets in adhesives is severely limited in terms of service temperature, since elastomers decompose in the temperature range of about 120-140°C
Method used
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Embodiment Construction
[0047] figure 1 The complex viscosity of the adhesive system according to the invention is shown as a function of time in an exemplary joining process (dashed line) according to the KTL process. Furthermore, the temperature profile (solid line) during the KTL process can be learned from this figure.
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Abstract
The invention relates to a thermally curing adhesive composition, which can be used for joining components made of materials with different longitudinal expansion behaviors, to form a composite workpiece. The invention further relates to an associated joining method for composite workpieces and to composite workpieces which can be obtained using said method. The adhesive composition according to the invention is characterized in that the adhesive composition comprises particles of polypropylene containing beta-nucleating agent and / or of beta-nucleated polypropylene.
Description
[0001] The present invention relates to heat-curing adhesive compositions useful for joining components made of materials having different linear expansion properties into composite workpieces. Furthermore, the invention relates to a method for joining composite workpieces using the adhesive composition. Finally, the invention relates to the composite workpiece obtainable by means of this method. technical background [0002] In many technical fields, composite workpieces are increasingly being used. In motor vehicle construction, for example, the use of composite workpieces often results in significant weight savings without having to endure a deterioration in the mechanical properties. In some cases, the required properties can only be achieved by composites of different materials. Many different joining methods are available to those skilled in the art for making composite workpieces. The present invention is limited to joining methods in which adhesives are used. [00...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C09J163/00C09J5/06C09J123/10C09J11/08
CPCC09J5/06C09J11/08C09J163/00C08L2205/242C08L23/10
Inventor R.N.贝伦特
Owner VOLKSWAGEN AG