Water-swellable hot-melt-type adhesive

C - Chemistry – Metallurgy – 09 – J

Patent

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Details

C09J 123/08 (2006.01) C09J 11/08 (2006.01) C08L 23/08 (2006.01) C08L 71/02 (2006.01) D04H 1/58 (2006.01)

Patent

CA 2356925

Water-swellable hot-melt adhesives based on a tackifying resin, a water- dispersible EVA wax, an ethylene/acrylic ester copolymer, a water-soluble homo- or co-polymer and a super absorber polymer powder having an average particle size of less than 80 µm display a clearly improved swelling behavior in comparison with the prior art. Furthermore, the swelling agent is significantly more homogeneously distributed in the matrix. Such hot-melt adhesives are suitable for ensuring longitudinal water impermeability in modern cable structures, as water-swellable jointing compounds in the building industry in the area of building conservation and restoration. Such hot-melt adhesives are further suitable for the manufacture of absorbent textile fabrics in the personal hygiene sector.

Adhésif fusible gonflant à l'eau, qui comprend une résine possédant des propriétés d'adhésion, une cire constituée d'un copolymère éthylène-acétate de vinyle (EVA) dispersible dans l'eau, un copolymère d'ester d'acide acrylique-éthylène, un homopolymère ou un copolymère hydrosoluble et une poudre polymère superabsorbante de granulométrie moyenne inférieure à 80 mu m. Ces poudres présentent une aptitude à gonfler avec l'eau améliorée par rapport aux poudres existantes. En outre, l'agent gonflant est réparti d'une manière sensiblement plus homogène dans la matrice. Ces adhésifs fusibles conviennent comme agents d'étanchéité longitudinale dans les structures de câbles modernes, comme garnitures de joints gonflant à l'eau dans l'industrie du bâtiment pour la protection ou la rénovation des bâtiments, ainsi que pour la fabrication de matériaux textiles absorbants dans le domaine de l'hygiène.

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