Patent ID: 6399171
Filing Date: 2002-06-04
Classification: B32B,C09J,Y10T

Abstract:
A method of manufacturing a laminate having barrier properties comprising:(I) coating at least one side of a substrate with a laminating adhesive, (II) brining a coated side of said substrate into contact with a second substrate to form a multi-layer film, and (III) treating said multi-layer film with a free radical initiator, wherein said laminating adhesive is made by mixing an ethylenically unsaturated acid selected from the group consisting of itaconic, fumaric, maleic, citraconic, acrylic, methacrylic, and cinnamic, itaconic acid monomethylester, vinylphosphonic acid, mesaconic acid, sorbic acid, and vinyl sulphonic acid, and mixtures thereof and a polyalkylenimine having a crosslinker reacted therein, wherein said crosslinker is a) an organic crosslinker selected from acrylates, methacrylates, epoxides, isocyanates, thiocyanates, acid halides, acid anhydrides, esters, alkyl halides, aldehydes and combinations thereof, or b) a reactive silane having the formula QSiRm(OR)3-m, where Q is any group containing one or more acrylates, aldehydes, methacrylates, acrylamides, methacrylamindes, isocyanates, isothiocyanates, anhydrides, epoxides, acid chlorides, linear or branched halogenated alkyl, and halogenated aryl and m is 0, 1, or 2, and R is a group having from 1 to 4 carbon atoms, wherein said polyalkylenimine has four or more A, B, or C units, where: A is an â€”R2â€”N(R1)2 unit, B is an â€”R1â€”N(R2)2 unit, and C is an (â€”R2)3Nâ€” unit, where: R1 is independently selected from hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, arylalkyl, and alkylaryl, and R2 is independently selected from the group consisting of: linear or branched alkylene groups or substituted alkylene groups having from 1 to 18 carbon atoms, and arylene groups or substituted arylene groups having from 6 to 18 carbon atoms, where the ratio of A to B to C units is from 1:0.5:0.5 to 1:2:1.