High heat metal-polymer laminate

Claim 1

A metal-polymer-metal structural laminate having an unexpected property balance of high stiffness, good adhesion between polymer and metal, and automotive paint bake oven stability, said laminate comprising a core of polymeric resinous material having tightly adhered to each side thereof a metal skin layer wherein: (a) said metal skin layer is about 5 to about 40 mils thick; (b) said laminate has a ratio of core thickness to skin thickness of between about 1:2 and about 20:1; (c) said laminate total thickness is between about 15 mils and about 300 mils; and (d) said polymeric resinous material comprises the admixture obtained by intimately mixing about 4 to about 96 parts by weight of an elastomeric block copolymer and about 96 to about 4 parts by weight of an engineering thermoplastic resin so as to form at least partial continuous interlocking networks wherein (i) said block copolymer comprises at least two monoalkenyl arene polymer end blocks A and at least one substantially completely hydrogenated conjugated diene mid block B, said block copolymer having an 8 to 55 percent by weight monoalkenyl arene polymer block content, each polymer block A having an average molecular weight of between about 5,000 and about 125,000, and each polymer block B having an average molecular weight of between about 10,000 and about 300,000; and (ii) said engineering thermoplastic resin has a generally crystalline or amorphous structure and a crystalline melting point or glass transition point over about 120° C.