Coated carrier

DETAILED DESCRIPTION What is claimed is: 1.
A carrier comprised of a core and thereover a first polymer coating comprising a linear polycarbonate polymer obtained from the curing of a cyclic polycarbonate oligomer with an M.
sub.
w of about 5,000 to about 300,000, and an M.
sub.
n of about 2,000 to about 150,000, and a second polymer coating, and wherein said second coating is comprised of a polyurethane, and which polyurethane optionally contains dispersed therein conductive components.
2.
A carrier in accordance with claim 1 wherein said cyclic is of a ring size of about 2 to about 20 members.
3.
A carrier in accordance with claim 1 wherein said oligomer is ##STR4## where n is an integer of from about 2 to about 20, and R is an aliphatic group.
4.
A carrier in accordance with claim 3 wherein R is methyl, ethyl, or perfluoromethyl.
5.
A carrier in accordance with claim 1 wherein said oligomer is derived from 4,4'-isopropylidene bisphenol, 4,4'-cyclohexylidene bisphenol, dihydroxy-N,N,N',N'-tetraphenyl-[1,1'-biphenyl]-4,4'-diamine, or 4,4'-hexafluoroisopropylidene bisphenol, and said oligomer is cyclo-poly(4,4'-isopropylidene bisphenol) carbonate, cyclo-poly(4,4'-isopropylidene bisphenol-co-dihydroxy-N,N,N',N'-tetraphenyl-[1,1'-biphenyl]-4,4'-diamine) carbonate, cyclo-poly(4,4'-isopropylidene bisphenol-co-4,4'-hexafluoroiso propylidene bisphenol) carbonate, or cyclo-poly(4,4'-cyclohexylidene bisphenol) carbonate.
6.
A carrier in accordance with claim 1 wherein the curing is accomplished by heating.
7.
A carrier in accordance with claim 6 wherein the heating is a temperature of about 200.
degree.
C.
to about 300.
degree.
C.
8.
A carrier in accordance with claim 1 wherein the first polymer coating weight thereof is from about 0.
1 to about 20 weight percent.
9.
A carrier in accordance with claim 1 wherein the first polymer coating weight is from about 1 to about 3 weight percent.
10.
A carrier in accordance with claim 1 wherein the first polymer coating contains a conductive component.
11.
A carrier in accordance with claim 10 wherein the conductive component is a metal oxide, or is carbon black