| 摘要 |
The invention provides a cyanoacrylate monomer adhesive formulation which has improved thermal properties resulting from the inclusion in the formulation of a "quinoid" compound of the formula: <CHEM> where R is C(CN)2, C(CO2R<e>)2, C(SO2R<e>)2 or C(Ph)2; R<a>, R<b>, R<c> and R<d> are independently H, monovalent hydrocarbon, halogen or strong electron withdrawing groups; or two of R<a>, R<b>, R<c> and R<d> combined form a fused hydrocarbon ring; R<1> is C(CN)2, C(CO2R<e>)2, C(SO2R<e>)2 or C(Ph)2 or R<1> and R<b> combined form a fused ring having a C(CN)2, C(CO2R<e>)2, C(SO2R<e>)2 or C(Ph)2 group in conjugation with R; R<e> is alkyl and Ph is phenyl or R and R<1> are both O; and R<a>, R<b>, R<c> and R<d> are independently H, monovalent hydrocarbon, halogen, hydroxyl, alkoxyl or strong electron withdrawing groups, or two of R<a>, R<b>, R<c> and R<d> combined form a fused hydrocarbon ring, provided that at least two of R<a>, R<b>, R<c> and R<d> are halogen or strong electron withdrawing groups, or R is O; R<1> is C(CN)2, C(CO2R<e>)2, C(SO2R<e>)2 or a diphenylmethylene group, the phenyl groups of which may be optionally substituted with one or more halo, hydroxyl, alkoxyl, hydrocarbon, nitro, acyloxy or cyano groups; and R<a>, R<b>, R<c> and R<d> are independently H, monovalent hydrocarbon, halogen or strong electron withdrawing groups, or two of R<a>, R<b>, R<c> and R<d> combined form a fused hydrocarbon ring. |
