Cohesion-reduced binder production and use thereof in...

Details Cohesion-reduced binder production and use thereof in... Cohesion-reduced binder production and use thereof in...

C - Chemistry, Metallurgy

09

J

C09J 175/08 (2006.01) C08G 18/10 (2006.01) C08G 18/71 (2006.01) C08K 3/00 (2006.01) C08K 3/26 (2006.01)

Patent

CA 2541112

The invention relates to binding agents containing polyurethanes with reduced cohesion, the production and use thereof in assembly adhesives. The polyurethanes contained in said binding agents comprise silyl groups, which are cleaved on addition of moisture with an increase in molecular weight. Said assembly adhesives are characterised by a bonding agent content of less than 15 wt. %, a filler content in the total composition of more than 20 and less than 80 wt. % or 80 to 95 wt. % and a weight ratio of filler to binder of more than 1.44: 1.

Liants contenant du polyuréthanne à cohésion diminuée, leur production et leur utilisation dans des colles de fixation. Les polyuréthannes contenus dans les liants selon la présente invention possèdent des groupes sylile qui se détachent en présence d'humidité, avec une augmentation de leur poids moléculaire. Les colles de fixation selon la présente invention se caractérisent en ce que leur teneur en liant est inférieure à 15 % en poids, la quantité de matières de charge dans la composition totale est supérieure à 20 et inférieure à 80 % en poids, ou est supérieure à 80 % en poids, jusqu'à 95 % en poids, et le rapport pondéral entre la matière de charge et le liant est supérieure à 1,44/1.

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