▎ 摘　　要

NOVELTY - Multiple hydroxy groups substituted aromatic amine compound (I) is new. USE - (I) is useful in preparing pyridine diimine metal complex and supported pyridine diimine metal complex as main catalyst in bulk, solution or slurry polymerization of olefin monomers (claimed). ADVANTAGE - (I): can greatly increase the probability of reacting with the active groups on the chemically modified carrier; makes the pyridine diimine complex easier to bond with the carrier, and thus the loading reaction time is short; and ensures the supported pyridine diimine metal complex has excellent heat resistance and high high-temperature activity. DETAILED DESCRIPTION - Multiple hydroxy groups substituted aromatic amine compound of formula (I) is new. R1a, R1b = 1-20C alkane groups; and R1 = 6-60C aromatic hydrocarbon groups and 3-60C heterocyclic aromatic hydrocarbon groups (both optionally substituted). INDEPENDENT CLAIMS are also included for: (1) multiple hydroxy groups substituted pyridine diimine compound of formulae (IV) or (V); (2) preparing the pyridine diimine compound, comprising either reacting 1,1'-(pyridine-2,6-diyl)diethanone (T), (I), and catalyst organic acid in organic solvent at 40-120 degrees C for 1-48 hours to obtain (IV), where the molar ratio between (T) and (I) is 1:2-1:4, the molar ratio between (T) and catalyst organic acid is 1:0.001-1:0.5, the mass ratio of (T) to solvent is 1:5-1:100, the catalyst organic acid is formic acid, acetic acid, p-toluenesulfonic acid or camphorsulfonic acid, and the organic solvent is dichloromethane, chloroform, 1,2-dichloroethane, tetrahydrofuran, 1,4-dioxane, benzene, toluene and/or chlorobenzene, or reacting pyridine compound of formula (T2), (I) and catalytic organic acid in organic solvent at 40-120 degrees C for 1-48 hours to obtain (V), the molar ratio of T2 to (I) is 1:1-1.5, the molar ratio of (T2) to catalyst organic acid is 1:0.001-0.5, the mass ratio of (T2) to solvent is 1:5-1:100, the catalyst organic acid is formic acid, acetic acid, p-toluenesulfonic acid or camphorsulfonic acid, and the organic solvent is dichloromethane, chloroform, 1,2-dichloroethane, tetrahydrofuran, 1,4-dioxane, benzene, toluene and/or chlorobenzene; (3) pyridine diimide complex, the metal complex is prepared by reacting the pyridine diimide compound with a late transition metal salt, preferably adding late transition metal salt into a solution of the pyridine diimide compound having concentration of 0.01-0.1 mmol/ml for reaction in a reactor under a nitrogen atmosphere, the late transition metal salt and the pyridine diimine compound have an equimolar amount, stirring the reaction system for 1-48 hours at room temperature, concentrating the reaction solution under reduced pressure to one-tenth to one-fifth of the volume of the original solution, and adding precipitation agent 10-50 times the volume of the concentrated solution, and suction filtering, washing the solid with a precipitant, vacuum drying it to obtain pyridine diimide metal complex, the late transition metal salt is iron(II) chloride, iron(II) bromide, cobalt(II) chloride or cobalt(II) bromide, the solvent in the solution of the pyridine diimine compound is dichloromethane, chloroform, 1,2-dichloroethane, chlorobenzene, dichlorobenzene, toluene, tetrahydrofuran and/or 1,4-dioxane, and the precipitating agent is n-pentane, n-hexane, n-heptane, n-octane and/or cyclohexane; (4) supported pyridine diimine metal complex prepared by reacting the pyridine diimine metal complex with a carrier treated with a modifier, preferably adding dichloromethane into the modified carrier to obtain modified carrier suspension, the concentration of the modified carrier in the modified carrier suspension is 0.01-0.1 g/ml, and then adding anhydrous dichloromethane solution of the pyridine diimine metal complex having concentration of 0.01-0.1 mmol/ml, the ratio of pyridine diimide metal complex to the modified carrier is 0.1-5 mmol based on pyridine diimide metal complex per gram of modified carrier, carrying out the reaction for 10 minutes to 2 hours at a reaction temperature of -20 to 50 degrees C, filtering, washing with dichloromethane, and vacuum drying to obtain supported pyridine diimine metal complex; and (5) use of the pyridine diimine metal complex or the supported pyridine diimine metal complex as main catalyst in bulk, solution or slurry polymerization of olefin monomers, where the polymerization temperature is -20 to 120 degrees C, the pressure is 0.1-10 MPa when the olefin monomer is a gas, the olefin monomer is ethylene, propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-decene, norbornene, vinyl norbornene, ethylidene norbornene, dicyclopentadiene, 1,4-butadiene, styrene, alpha -methylstyrene and/or divinylbenzene, the amount of the main catalyst is 1x 10-6 to 1x 10-3 mol/l of the main catalyst solvent, and the number of moles of the main catalyst is calculated based on the number of moles of metal, the molar ratio of the co-catalyst to the metal in the main catalyst is 10-4000:1, and the co-catalyst is alkyl aluminum, alkyl aluminoxane or boride.