Assembly adhesive on the basis of an aqueous polymer dispersion

Details Assembly adhesive on the basis of an aqueous polymer dispersion Assembly adhesive on the basis of an aqueous polymer dispersion

C - Chemistry, Metallurgy

09

J

C09J 125/14 (2006.01) C09J 133/06 (2006.01) C08L 33/02 (2006.01) C08L 33/08 (2006.01) C08L 33/26 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2405446

The aim of the invention is to improve the initial adhesion of an adhesive used for assembly. Said adhesive is based upon an aqueous dispersion of a styrene/acrylate copolymer. A thickening agent is provided which consists of 0.5 to 5 wt. % of an inorganic thickening agent, such as highly disperse silicic acid, and 1 to 10 wt. % of an aqueous system of an acrylic acid/acrylamide copolymer. Such a mass is spreadable and dimensionally stable, can be applied from a cartridge and almost immediately reaches adhesion values of approximately 30 g/cm2. The assembly adhesive is thus particularly useful for gluing together constructions made of wood, ceramics, glass, cement, metal and synthetic materials used in the construction industry.

En vue d'améliorer l'adhérence initiale d'un adhésif d'assemblage à base d'une dispersion aqueuse d'un copolymère styrène/acrylate, l'invention consiste à utiliser un agent épaississant comprenant 0,5 à 5 % en poids d'un épaississant inorganique, tel que l'acide silicique hautement dispersé, et 1 à 10 % en poids d'un système aqueux d'un copolymère acide acrylique/acrylamide. Un tel produit a de bonnes propriétés d'étalement et de stabilité de forme. Il peut être appliqué à partir d'une cartouche et présenter, pratiquement immédiatement, des valeurs d'adhérence atteignant environ 30 g/cm?2¿. L'adhésif d'assemblage convient donc ainsi particulièrement pour le collage de constructions en bois, céramique, verre, ciment, métaux et matières plastiques dans l'industrie du bâtiment.

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