Weather-resistant dye and use thereof

A weather-resistant dye,

• characterized in that the dye contains in molecules thereof not only chromophoric parent D, but also electron-accepting group Q which is connected with dye parent D through non-conjugated carbon link L to constitute D-L-Q dye molecule;
• said dye includes cyan dye, said cyan dye comprises compound of general formula I or mixture thereof:
• wherein MPc is chromophoric donating group D as phthalocyanine parent, L is the non-conjugated linking group, Q is the electron-accepting group, the HOMO energy level of Q is lower than the HOMO energy level of the dye chromophoric parent D;
• in the general formula I, a and c are the same or different integer of 0-3, b is an integer of 1-4, the sum of a+b+c is 2-4;
• M in the MPc phthalocyanine parent is hydrogen atom, metal atom or oxide, hydroxyl compound or halide thereof, Pc is phthalocyanine parent ring;
• R1 and R2 are the same or different H, alkyl of C1-18, aryl of C6-12, phenyl or naphthyl with substituent A, or (CR3R4)nA, R3 and R4 are the same or different H or alkyl of C1-4;
• A is H, OH, NH2, CO2M″ or SO3M″, n is 1-18;
• M′ and M″ are the same or different H, metal ion selected from the group consisting of Na, K, and Li, ammonium salt NH4, and organic ammonium salt selected from the group consisting of N(CH4, NH(CH3, NH2(CH2, NH3(CH3), NH(CH2CH2OH)3, NH2(CH2CH2OH)2 and NH3CH2CH2OH;
• L is —NR3(CR4R5)mNR6— or —NR3(CR4R5)m—, wherein R5 and R6 are the same or different H or alkyl of C1-4;
• m is the same or different integer 1-4;
• Q has general formula Q2;
• R9 is H, Cl, Br, CN, CF3 CH3 SO3M″ or CO2M″;
• x is integer of 0-3;
• and
• Z1 and Z2 are the same or different O or C(CN)2.