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Methacrylate structural adhesive

A technology of methacrylate and structural adhesives, applied in the direction of chloroprene adhesives, conjugated diene adhesives, adhesive types, etc., which can solve problems such as poor durability and poor high temperature performance

Inactive Publication Date: 2005-08-03
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, known flexible structural adhesives have unacceptably poor high temperature performance and poor durability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0029] The following compositions were prepared and tested. Test samples of the monomer components were prepared as described above, where wt% refers to the composition of the monomer components. For all samples tested, the catalyst component was an 18% benzoyl peroxide slurry. For comparison in test samples a ratio of 10:1 (monomer component:catalyst component) was used.

[0030] To use a structural adhesive, a monomer component is mixed with a catalyst component and applied to a workpiece, which is then bonded together. The tensile strength, elongation and modulus of the resulting compositions were measured according to the method procedure described in ASTM D638-95, while the lap shear strength was measured according to ASTM D1002-94. The elastic recovery of the composition is calculated from a strength versus stress curve formed based on the modulus of the composition. The linear part of the curve corresponds to the elastic recovery of the composition.

[0031] ...

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PUM

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Abstract

Several compositions for use as structural adhesives are disclosed. The compositions include a monomer component and a catalyst component. In one aspect, the monomer component includes a first elastomeric material of a block copolymer of styrene and isoprene, a second elastomeric material of a block copolymer of styrene and butadiene, and a cross-linked rubber of a copolymer of acrylonitrile and butadiene. In a second aspect, the monomer component includes a first elastomeric material of a block copolymer of styrene and butadiene, and a cross-linked rubber of a copolymer of acrylonitrile and butadiene. In another aspect, isophthalic acid is utilized as a polymerizable acid monomer in combination with a phosphate ester. In another aspect, the monomer component includes a cohesive failure mode promoter of rosin esters or of talc.

Description

field of invention [0001] The present invention relates to a methacrylate structural adhesive and to a method of using the adhesive. Background of the invention [0002] Structural adhesives are well known for bonding metal to metal, metal to plastic, and plastic to plastic. Structural adhesives are an attractive alternative to mechanical joining methods such as riveting and spot welding because they distribute load stress over a larger area rather than concentrating such stress at a few points Options. The use of structural adhesives can reduce or eliminate finishing costs because the fasteners do not need to be hidden for an aesthetically pleasing appearance. Structural adhesives also result in cleaner and more stable products because they seal out water, dust and noise. Additionally, they can be used to bond many different materials without extensive surface preparation. [0003] Despite their appeal, known structural adhesives have a number of potential disadvantages...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J4/00C09J4/02C09J4/06C09J109/02C09J111/00C09J153/02
CPCC09J4/06
Inventor W·温S·伽兹J·张
Owner SIKA TECH AG