Patent ID: 6042643
Filing Date: 2000-03-28
Classification: C01P,C04B,C08K,C09B,C09C,C09D,D01F,D06M,D06P,D21H,Y10S

Abstract:
A carbon black product having an organic group attached to the carbon black, prepared by a process comprising the step of reacting at least one diazonium salt with a carbon black in a protic reaction medium, wherein said diazonium salt is generated in situ from a primary amine, the protic medium is an aqueous medium, and the primary amine is an amine of the formula A.sub.y ArNH.sub.2, in which:Ar is an aromatic or heteroaromatic radical;A, which can be the same or different when y is greater than 1, is independently a substituent on the aromatic radical selected from:a functional group selected from the group consisting of OR, COR, COOR, OCOR, a carboxylate salt, halogen, CN, NR.sub.2, SO.sub.3 H, a sulfonate salt, OSO.sub.3 H, OSO.sub.3 -- salts, NR(COR), CONR.sub.2, NO.sub.2, OPO.sub.3 H.sub.2, a monobasic or dibasic phosphate salt, PO.sub.3 H.sub.2, a monobasic or dibasic phosphonate salt, N.dbd.NR, N.sub.2.sup.+ X.sup.-, NR.sub.3.sup.+ X.sup.-, PR.sub.3.sup.+ X.sup.-, S.sub.k R, SO.sub.2 NRR', SO.sub.2 SR, SNRR', SSO.sub.3 H, a SSO.sub.3.sup.- salt, SNQ, SO.sub.2 NQ, CO.sub.2 NQ, S-(1,4-piperazinediyl)-SR, 2-(1,3-dithianyl), 2-(1,3-dithiolanyl), SOR, and SO.sub.2 R;a linear, branched, aromatic, or cyclic hydrocarbon radical substituted with one or more of said functional groups; andan unsubstituted cyclic hydrocarbon radical;where R and R', which can be the same or different, are hydrogen; branched or unbranched C.sub.1 -C.sub.20 unsubstituted or substituted alkyl, alkenyl, or alkynyl; unsubstituted or substituted aryl; unsubstituted or substituted heteroaryl; unsubstituted or substituted alkylaryl; or unsubstituted or substituted arylalkyl; whereink is an integer from 1 to 8;X-- is a halide or an anion derived from a mineral or organic acid;y is an integer from 1 to the total number of --CH radicals present in the aromatic radical; andQ is (CH.sub.2).sub.w, (CH.sub.2).sub.x O(CH.sub.2).sub.z, (CH.sub.2).sub.x NR(CH.sub.2).sub.z, or (CH.sub.2).sub.x S(CH.sub.2).sub.z, where x is 1 to 6, z is 1 to 6, and w is 2 to 6.