Epoxy based reinforcing patches with improved adhesion to oily metal surfaces
AssigneeDow Global Technologies LLC
InventorMichael R. Golden
Life of this patent
Estimating the term…
Abstract
Reinforcing sheets that exhibit improved adhesion to cold and/or oily substrates have an adhesive layer that contains an epoxy-terminated adduct of an epoxy resin and a rubber that contains a low amount of a nitrile monomer.
Claims20
A reinforcing sheet comprising at least one layer of a reinforcing material and a layer of a solid thermosetting adhesive, wherein the thermosetting adhesive includes (a) a curing agent and (b) an epoxy-terminated adduct of an epoxy resin and a conjugated diene or conjugated diene/nitrile rubber containing not more than about 15% by weight polymerized nitrile monomer, and wherein said thermosetting adhesive contains no more than about 3.5% by weight polymerized nitrile monomer.
A method of reinforcing a substrate, comprising
- (A) applying to the substrate a reinforcing sheet comprising at least one layer of a reinforcing material and a layer of a solid thermosetting adhesive, wherein the thermosetting adhesive includes (a) a curing agent and (b) an epoxy-terminated adduct of an epoxy resin and a conjugated diene or conjugated diene/nitrile rubber containing not more than about 15% by weight polymerized nitrile monomer, and wherein said thermosetting adhesive contains no more than about 3.5% by weight polymerized nitrile monomer, and then
- (B) curing said thermosetting adhesive.
Dependencies are inferred from the claim text.