Patent ID: 6265126
Filing Date: 2001-07-24
Classification: C01P,C09C,G03G,Y10T

Abstract:
A hydrophobic metal oxide powder having a surface coating formed by simultaneous treatment of a metal oxide powder with materials (A) and (B), where material (A) is a silicone oil having glycidyl epoxy groups, and material (B) is a non-polymeric amine compound having primary and/or secondary amino groups, the amounts of (A) and (B) being such that the total number of primary and/or secondary amino groups in molar units in the amount of material (B) is lower than the total number of the epoxy groups in molar units in the amount of material (A),the amine compound of material (B) being an amine selected from the group consisting of an aliphatic primary amine of the formula R.sup.1 NH.sub.2, where R.sup.1 is an alkyl group having 4 to 20 carbon atoms and an alkyl group R.sup.1 may have an ether bond,an aromatic amine having at least one primary or secondary amino group,a heterocyclic amine having at least one primary or secondary amino group,an aliphatic secondary amine of the formula R.sup.1 R.sup.2 NH, where R.sup.1 and R.sup.2 are the same or different alkyl groups each having 1 to 10 carbon atoms, and an alky R.sup.1 and/or R.sup.2 group may have an ether bond,a diamine of the formula R.sup.1 R.sup.2 NXNHR.sup.3, where R.sup.1, R.sup.2 and R.sup.3 are each a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and may be the same or different, an alkyl group R.sup.1, R.sup.2 and/or R.sup.3 may have an ether bond, and X is an alkylene group having 1 to 10 carbon atoms,a triamine of the formula R.sup.1 R.sup.2 NXNR.sup.3 YNHR.sup.4, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, but, all the R.sup.1, R.sup.2, R.sup.3, and R.sup.4 groups are not hydrogen atoms, and may be the same or different, an alkyl group R.sup.1, R.sup.2, R.sup.3, and/or R.sup.4 may have an ether bond, and X and Y are each an alkylene group having 1 to 10 carbon atoms,an alicyclic amine having at least one primary or secondary amino group,and a heterocyclic amine having primary or secondary aminoalkyl group.