C - Chemistry – Metallurgy – 09 – J
Patent
C - Chemistry, Metallurgy
09
J
154/107.4
C09J 175/04 (2006.01) C08L 75/04 (2006.01)
Patent
CA 1059890
SOLVENT FREE METHOD OF LAMINATING USING ISOTHIOCYANATE ADHESIVE Abstract of the Disclosure A method for joining foils which includes the steps of mechanically coating at a high speed at least one of the foil sides to be joined with a reaction product of a hydroxy-functional polyethers or polyesters with polyiso- cyanates, said reaction product containing free-NCO groups and being reactable with H-acid compounds, and subsequently laminating foils. The reaction product has an average molecular weight of from about 500-10,000 and a -NCO group content of from about 1-10% by weight, and is substan- tially solvent-free when applied and has a viscosity of at most 60 Pas under application conditions. The temperature of the reaction product application conditions is adjusted to at most 140°C but not less than a temperatare which is so far below the temperature of the ambient air that air humidity will be condensed in the reaction product to be applied in such an amount that its pot-life would drop the value required for the implementation of the method.
238897
Bergk Berndt
Lilienbeck Klemens
Ottmann Gerhard F.
Stolzenbach Heinrich
Wramba Herbert
Herberts Gesellschaft Mit Beschrankter Haftung
Na
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