H - Electricity – 01 – B
Patent
H - Electricity
01
B
H01B 3/40 (2006.01) C08G 59/68 (2006.01) H02K 15/12 (2006.01)
Patent
CA 2144593
The invention relates to a process for fixing wire windings by trickling an impregnating resin on to the heated rotating winding or by dipping the heated rotating winding in a bath filled with an impregnating resin, which process comprises using as impregnating resin a composition comprising (A) an epoxy resin and (B) an initiator for the polymerisation of the epoxy resin, said initiator (B) being one of the following components (B1) or (B2) or a mixture of (B1) and (B2), and (B1) a compound which is activatable by UV irradiation of formula I, IIa, IIb or IIc Image (I), Image (IIa), Image (IIb), Image (IIc), wherein a and b are each independently of the other 1 or 2, R1 is a .pi.-arene, R2 is a .pi.-arene or the anion of a .pi.-arene, R3, R4 and R5 are each independently of one another C1-C18alkyl, C2-C18alkenyl or C5-C18aryl, each unsubstituted or substituted by one or more than one member selected from the group consisting of alkyl, alkoxy, phenyl, amino, alkylamino, dialkylamino and halogen, q is an integer from 1 to 10, [X] ? is an anion [LQm] ? or an anion of a partially fluorinated or perfluorinated aliphatic or aromatic sulfonic acid, L is B, P, As or Sb, Q is fluoro, and some of the substituents Q may also be hydroxyl groups, and m corresponds to the valencyof L increased by one, and (B2) is a heat-activatible initiator consisting of a mixture comprising (a) at least one quarternary ammonium salt of an aromatic-heterocyclic compound which contains 1 or 2 nitrogen atoms, and of a complex halide anion selected from the group consisting of BF4 ?,PF6 ?, SbF6 ?, SbF5(OH) ? and AsF6 ?, and (b) at least one thermal radical former (b1), (b2), (b3) or (b4), wherein (b1) is a diarylethane derivative of formula III Image (III), wherein Ar is phenyl, naphthyl, or C1-C4alkyl- or chloro-substituted phenyl, R6 is hydroxy, C1-C4alkoxy, -O-CO-R8 or -OSiR9R10R11, wherein R8 is C1-C8alkyl or phenyl, and R9, R10 and R11 are each independently of one another C1-C4alkyl or phenyl, and R7 is C1-C4alkyl or cyclohexyl or has the same meaning as Ar, (b2) is an oligomer of formula IV Image (IV), wherein Ar, R7, R9 and R10 have the same meaning as in formula II and n is 2-20,(b3) is an organic peroxy compound, and (b4) is a quinone.
Bar Daniel
Mayer Carl W.
Moser Roland
Fetherstonhaugh & Co.
Vantico Ag
LandOfFree
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