Rubber-based structural white-shell adhesives

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 121/00 (2006.01) C09J 5/06 (2006.01) C09J 11/08 (2006.01) C09J 109/00 (2006.01)

Patent

CA 2211591

Single-component thermosetting structural adhesives based on liquid rubbers, which can optionally contain portions of functional groups, solid rubbers, thermoplastic polymer powders and sulphur as well as vulcanization accelerators, are suitable for assembling metal parts. Combined tension and shear resistance levels of more than 15 MPa can be attained with simultaneously high breaking elongation of more than 15 %. These adhesives are substantially free from low-molecular epoxy resins and are particularly suitable for use on raw structures in the automotive industry.

Les adhésifs structuraux à un composant durcissant sous l'effet de la chaleur, à base de caoutchoucs liquides, pouvant éventuellement contenir une part de groupes fonctionnels, de caoutchoucs durs, de poudres polymères thermoplastiques et de soufre, ainsi que d'accélérateurs de vulcanisation, s'utilisent pour assembler par collage des pièces métalliques. On peut ainsi atteindre des niveaux de résistance à la traction et au cisaillement supérieurs à 15 Mpa, et simultanément, un allongement élevé à la rupture, de plus de 15 %. Ces adhésifs sont pratiquement exempts de résines époxy de faible poids moléculaire et leur utilisation est particulièrement indiquée dans l'industrie automobile, sur des structures brutes.

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