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US 4,055,552 AGranted
Hot-melt adhesives based on anionic terpolymers of lactams
AssigneeCeskoslovenska akademie ved
InventorsZbynek Bukac, Jan Sebenda, Richard Suchy
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AssigneeCeskoslovenska akademie ved
InventorsZbynek Bukac, Jan Sebenda, Richard Suchy
Estimating the term…
The invention relates to hot-melt adhesives based on anionic copolymers of lactams, where one of the starting lactams is 8.octanolactam in the amount of 10-90 mol.% and the other at least 2 lactams containing 6 or more 6 atoms in the ring are in the amount 90-10 mol.%. These further lactams are preferably 6-hexanolactam and 12-dodecanolactam. The melt adhesives may contain further additives, as dyes, fillers, molecular weight regulators, etc. The anionic copolymerization used for their manufacturing is the simple and rapid technique which requires lower temperatures and can be easily performed continuously. The said polyamide melt adhesives are applicable e.g. in clothing and footwear industry and other textile and leather working.
Hot-melt adhesive from an anionic terpolyamide of 10-90 mol% 8-octanolactam and 90-10 mol% of at least two different anionically polymerizable lactams having 6 or more carbon atoms in the lactam ring, one of said latter lactams being of a lower molecular weight than the other, the latter lower molecular weight lactam being present in an amount of 10-60 mol% and the latter higher molecular weight lactam being present in an amount of 20-50 mol%.
Dependencies are inferred from the claim text.