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Process of solvent-free lamination using isocyanate/amine adhesives
| Details |
Inventors: Bauriedel, Hans; Hasenkamp, Rainer;
Assignee: Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA) (Dusseldorf-Holthausen, DE)
Primary Examiner: Goolkasian; John T.
Assistant Examiner: Gallagher; J. J.
Attorney, Agent or Firm: Hammond & Littell
A process for the production of laminated films employing a two component non-solvent adhesive system, which comprises the steps of applying a thin film of at least one polyether having at least two terminal isocyanate groups and a molecular weight between 2000 and 5000 to one of two films to be bonded together, applying a thin film of at least one long chain compound having at least two reactive terminal amino groups to the other film to be bonded, the application of both thin films being in such amounts that the molar ratio of isocyanate groups to amine groups is from 1:1 to 5:1 and the two components together being present in an amount of 0.5 to 5.0 gm/m.sup.2, pressing the coated sides of the two coated films together and recovering said laminated films. |
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DETAILED DESCRIPTION We claim: 1.
A method for the production of laminated films employing a two-component non-solvent adhesive system, which comprises the steps of applying a thin film of a mixture of (a) the reaction product of 1 mole of polyoxyalkylene glycol having 2 to 4 carbon atoms in the alkylene and 2 moles of a diisocyanate, said reaction product having a molecular weight of from 2000 to 5000, and (b) a compound selected from the group consisting of (i) the reaction product of an alkanepolyol having 3 to 10 carbon atoms and 3 to 6 hydroxyl groups or a cycloalkane polyol having 6 to 8 carbon atoms and 3 to 6 hydroxy groups with a diisocyanate, wherein 1 mole of diisocyanate is reacted per hydroxy group of said polyol; (ii) the reaction product of one mole of water and three moles of a diisocyanate; (iii) an aromatic triisocyanate; and (iv) a polyisocyanate, said compound (b) having at least three isocyanate groups being present in an amount of 0.
5 to 20% by weight, relative to said reaction product (a), to one of two films to be bonded together, applying to the other film to be bonded a thin film of at least one second reaction product of 1 mole of polyoxyalkylene glycol having 2 to 4 carbon atoms in the alkylene with 2 moles of acrylonitrile, which was subsequently catalytically hydrogenated, said reaction product having a molecular weight of from 300 to 2000, the application of both thin films being in such amounts that the molar ratio of isocyanate groups to amine groups is from 1:1 to 5:1 and the two components together being present in an amount of 0.
5 to 5.
0 gm/m.
sup.
2, pressing the coated sides of the two coated films together whereby adhesion between the coated films is initiated, and recovering said laminated films.
2.
The method of claim 1, wherein reaction product (a) is present in an amount of 1 to 10% by weight, realtive to compound (b).
3.
The method of claim 1, wherein said compound (b) is the reaction product of one mole of water and three moles of a diisocyanate
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Fuel Cells 
