Patent ID: 7754297

Claim:
An ink jet recording sheet comprising a colorant receiving layer disposed on a substrate, wherein the colorant receiving layer comprises fine particles, a water soluble resin, and a cationic resin including a unit represented by the following formula (1) and a cationic resin including a unit represented by the following formula (2): wherein in the formula (1), R represents a hydrogen atom or a methyl group; Y represents a divalent linking group; R 1 represents an optionally substituted aralkyl or aryl group; R 2 and R 3 each independently represent an optionally substituted alkyl, aralkyl or aryl group having 1 to 18 carbon atoms; R 4 represents an optionally substituted alkylene, aralkylene or arylene group; Q is at least one unit provided from a monomer having an ethylenic double bond, and represents a unit having an inorganic/organic ratio (I/O value) of less than 1 in an organic conceptional chart; X − represents an anion; m represents 20 to 100% by mole; and n represents 0 to 80% by mole; and in the formula (2), R represents a hydrogen atom or a methyl group; Y represents a divalent linking group; R 5 , R 6 and R 7 each independently represent an optionally substituted alkyl group having 1 to 18 carbon atoms; R 8 represents an optionally substituted alkylene, aralkylene or arylene group; Z is at least one unit provided from an aromatic group-containing monomer having an ethylenic double bond, and represents a unit having less than 0.5 of an inorganic/organic ratio (I/O value) in the organic conceptional chart; X − represents an anion; p represents 20 to 80% by mole; and q represents 20 to 80% by mole, wherein the monomer that provides the unit represented by Q in the formula (1) is styrene or vinyl toluene, the monomer that provides the unit represented by Z in the formula (2) is styrene or vinyl toluene, the I/O value of the cationic resin represented by the formula (1) is not more than 2 with a cation equivalent of at least 1.5 meq/g or more and no more than 4 meq/g, and the I/O value of the cationic resin represented by formula (2) is not more than 2 with a cation equivalent of at least 1.5 meq/g or more and no more than 4 meq/g; and wherein the unit Q in the formula (1) represents a vinyl toluene.