초록

A maleimide terminated polyimide incorporated into a two-part acrylic structural adhesive system. The maleimide terminated polyimide of the various embodiments of the present invention provide improving thermal stability, strength, and toughness.

대표청구항 ▼

1. A structural adhesive comprising: a free radical-polymerizeable monomer comprising tetrahydrofurfuryl methacrylate (THFMA); and,a maleimide terminated polyimide wherein the maleimide comprises a mono-, bis-, or poly-maleimide compound. 2. The composition of claim 1, further comprising a toughener

1. A structural adhesive comprising: a free radical-polymerizeable monomer comprising tetrahydrofurfuryl methacrylate (THFMA); and,a maleimide terminated polyimide wherein the maleimide comprises a mono-, bis-, or poly-maleimide compound. 2. The composition of claim 1, further comprising a toughener. 3. The composition of claim 2, wherein the toughener comprises at least one of glycidyl methacrylate/carboxyl terminated butadiene (GMA/CTB) adducts, core-shell impact modifiers, or block copolymer elastomers. 4. The composition of claim 1, further comprising an adhesion promoter. 5. The composition of claim 4, wherein the adhesion promoter comprises hydroxyethyl methacrylate (HEMA) phosphate. 6. The composition of claim 1, further comprising a metal dimethacrylate. 7. The composition of claim 6, wherein the metal dimethacrylate comprises zinc dimethacrylate. 8. The composition of claim 1, further comprising ethoxylated bisphenol A dimethacrylate. 9. The composition of claim 1, further comprising a particulate additive comprising at least one of calcium metasilicate or fumed silica. 10. A two part structural adhesive composition comprising: in part A: (a) at least one free radical-polymerizable monomer; (b) a maleimide terminated polyimide; and (c) a reducing agent; andin part B: an oxidizing agent. 11. An adhesive according to claim 10, wherein the reducing agent comprises at least one of N,N-diisopropanol-p-chloroaniline; N,N-diisopropanol-p-bromoaniline; N,N-diisopropanol-p-bromo-m-methylaniline; N,N-dimethyl-p-chloroaniline; N,N-dimethyl-p-bromoaniline; N,N-diethyl-p-chloroaniline; N,N-diethyl-p-bromoaniline; N,N-dimethyl-p-aniline; or N,N-diisopropanol-p-toluidine. 12. The adhesive of claim 10, wherein the oxidizing agent comprises benzoylperoxide. 13. The adhesive composition of claim 10, wherein the weight ratio of the first package to the second package is from about 1:1 to about 15:1. 14. The adhesive composition of claim 10 wherein the free radical-polymerizeable monomer comprises tetrahydrofurfuryl methacrylate (THFMA). 15. The adhesive composition of claim 10, further comprising at least one of glycidyl methacrylate/carboxyl terminated butadiene (GMA/CTB) adducts, core-shell impact modifiers, or block copolymer elastomers. 16. The adhesive composition of claim 10, further comprising hydroxyethyl methacrylate (HEMA) phosphate. 17. The composition of claim 1, further comprising an oxidizing agent. 18. The composition of claim 17, wherein the oxidizing agent comprises benzoylperoxide. 19. The composition of claim 1, further comprising a reducing agent. 20. The composition of claim 19, wherein the reducing agent comprises at least one of N,N-diisopropanol-p-chloroaniline; N,N-diisopropanol-p-bromoaniline; N,N-diisopropanol-p-bromo-m-methylaniline; N,N-dimethyl-p-chloroaniline; N,N-dimethyl-p-bromoaniline; N,N-diethyl-p-chloroaniline; N,N-diethyl-p-bromoaniline; N,N-dimethyl-p-aniline; or N,N-diisopropanol-p-toluidine.