| 摘要 |
The invention relates to a soft-magnetic powder comprising a core of a soft-magnetic material and a coating, the coating comprising an insulation treatment compound and an inhibitor, the inhibitor being:
(a) a carboxylic acid with the general formula (I)
wherein R 1 is a single bond or C 1 -C 6 -alkylene,
R 2 to R 6 are each independently H, OH, -X-COOH, C 1 -C 6 -alkyl, C 2 -C 6 -alkenyl, C 2 -C 6 -alkynyl, C 3 -C 7 -cycloalkyl, C 6 -C 12 -aryl, COOR 7 , OR 8 ,
or two adjacent groups R 2 to R 6 together form a ring,
X is a single bond or C 1 -C 6 -alkylene; R 7 , R 8 are C 1 -C 20 -alkyl;
or a salt of the carboxylic acid,
and/or
(b) a compound of the general formula (II)
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ (R 9 -O-)(R 10 -O-)(R 11 -O-)PO€ƒ€ƒ€ƒ€ƒ€ƒ(II)
wherein R 9 to R 11 independently of each other indicate C 1 -C 20 -alkyl, C 2 -C 20 -alkenyl, C 2 -C 6 -alkynyl, C 3 -C 7 -cycloalkyl, C 6 -C 12 -aryl, unsubstituted or substituted with one or more groups selected from OH and NH 2 ,
or
R 9 to R 11 are each independently a polydiol moiety having a molecular weight Mw of 500 to 30000 g/mol which is optionally capped at the end by -C 1 -C 20 -alkyl and/or at the connection to O atom bonding to P by C 1 -C 20 -alkylene,
or
R 10 , R 11 are each independently H.
The invention further relates to a process for producing the soft-magnetic powder and an electronic component comprising the soft-magnetic powder. |
