Shape memory material with improved mechanical properties
A modified, original shape technology, applied in epoxy resin adhesives, adhesive types, rubber-derived adhesives, etc., which can solve problems such as difficulty in achieving high recovery rate mechanical properties
Active Publication Date: 2020-08-04
SIKA TECH AG
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- Application Information
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Problems solved by technology
However, the combination of high recovery based on the shape memory effect and good mechanical properties, especially high lap shear strength, has proven difficult to achieve using the compositions disclosed in WO 2011 / 117402 and WO 2011 / 117398
Method used
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Embodiment
[0174] The following products shown in Table 1 were used in the examples
[0175] Table 1
[0176]
[0177]
[0178] The tougheners used in the exemplary compositions were prepared by following similar procedures as used to prepare polymers P1 to P6 ("Examples") disclosed in US Patent 9,796,809B2.
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Abstract
The invention is directed to a composition comprising an epoxy-based curable adhesive comprising at least one an epoxy resin modified acrylonitrile-butadiene copolymer and at least one thermoplastic elastomer, wherein the at least one thermoplastic elastomer is present in the curable adhesive as a penetrating polymer network. The invention is also directed to an expandable article composed of thecomposition, to a reinforcing element comprising a support and an expandable article, to a method for reinforcing cavities of structural components, and to use of the composition as a shape memory material.
Description
technical field [0001] The present invention relates to the field of expandable adhesive compositions for reinforcing structural components, such as those used in automobile bodies. In particular, the present invention relates to adhesive compositions which can expand in a desired direction even without the use of physical or chemical blowing agents. [0002] Background of the invention [0003] Hollow structural components are commonly used in bodywork and / or frames to reduce weight in water, land or air vehicles. Especially in the automotive industry, reducing vehicle weight has been an important challenge in the design of modern vehicles in order to meet increasingly stringent fuel economy and emission requirements. The use of hollow structural components provides an effective means of reducing vehicle weight, but at the same time leads to a reduction in the stability and strength of the structure. In addition, due to the larger surface of the hollow part, the cavity pro...
Claims
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IPC IPC(8): C08G59/42B29C61/06
CPCB29C61/06C08G59/4253C09J163/00C08L9/02C08L21/00C08C19/06C08L23/06C08L23/0853C08L23/12C08L2201/12C09J115/00
Inventor K·弗里克A·凯勒
Owner SIKA TECH AG
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