Patent ID: 6562410
Filing Date: 2003-05-13
Classification: C08G,H05K,Y10T

Abstract:
Heat curable compositions capable of being cured by cationic polymerisation comprising:(A) at least one compound which is capable of undergoing cationic polymerisation; (B) at least one quaternary ammonium salt of an aromatic-N-heterocyclic cation which contains one or two N-atoms, and of a non-nucleophilic anion; (C) at least one 1,1,2,2-substituted-1,2-ethane-diol and/or a derivative thereof, wherein the substituents in the 1- and 2-positions are selected aryl residues or aromatic-heterocyclic ring systems; and (D) optionally further additives; â€ƒcharacterised in that: said component (B) is selected from the group of anions comprising BF4âˆ’, PF6âˆ’, SbF6âˆ’, SbF5(OH)âˆ’, [B(X)p(Y)q]âˆ’, or CF3(CF2)mSO3âˆ’, wherein p and q are zero or an integer from 1 to 4, and wherein the sum of p and q is always 4; each X (for p&gE;1) independently of the other is halogen, or hydroxyl, wherein for halogen p is zero, 1, 2 or 3; and for hydroxyl p is zero, 1 or 2; each Y (for q&gE;1) independently of the other is phenyl, optionally substituted with at least two halogen atoms, or with one or two electron attracting groups, or Y is an aryl residue with at least two aromatic rings, optionally substituted with one or two halogen atoms, or with one or two electron attracting groups, and m is zero or an integer from 1 to 17; and said component (C) is a compound of formula (I): â€ƒwherein each of R1, R2 and R3 independently of the other is unsubstituted phenyl or has one of the meanings of R4; R4 is phenyl substituted by linear or branched (C1-C12)alkyl, (C1-C8)alkoxy-(C1-C8)alkyl, (C1-C12)alkyloxy, (C1-C12)alkylthio, (C1-C12)alkylcarbonyl, halogen, nitro, cyano, halo(C1-C8)alkyl, aryl, aryl-(C1-C8)alkyl; aryloxy, arylthio, benzoyloxy, benzoylmethyl and/or naphthoyloxy, or R4 is &agr;-naphthyl or &bgr;-naphthyl, 1-, 2- or 3-pyridyl, N-substituted(1-, 2- or 3-)pyridyl, &agr;-quinolinyl, &bgr;-quinolinyl, N-substituted (&agr;- or &bgr;-)quinolinyl, and wherein said aryl and heterocyclic rings may be further substituted by linear or branched (C1-C12)alkyl or halogen; or each of R1 and R2 and/or R3 and R4 independently of the other form a residue of formula (II): â€ƒwherein each of R5 and R6 independently of the other is hydrogen or (C1-C4)alkyl; R7 is â€”(CH2)nâ€” or â€”Sâ€” or â€”Oâ€”; n is 0, 1, 2 or 3; and wherein the weight-ratio of component B) to component C) is from 0.05:1.0 to 1.0:0.05.