The present invention relates to a dye monomer of general formula (I): A - X - R - O - C(O) - O - CH2- C(H) = CH2,wherein A is a dye molecule and both X and R are optional linkers. The present invention also relates to particles comprising a copolymer of said dye monomer and an ethylenically unsaturated monomer, to a method of producing said particles, to the use of said particles as nanopigments and to polymer dispersions comprising said particles as nanopigments.
本发明涉及一种一般式(I)的染料单体:A - X - R - O - C(O) - O - CH2- C(H) = ,其中A是染料分子,X和R均为可选的连接物。本发明还涉及包含所述染料单体和乙烯基不饱和单体的共聚物的颗粒,以及制备所述颗粒的方法,以及将所述颗粒用作纳米颜料的用途,以及包含所述颗粒作为纳米颜料的聚合物分散体。
The photochemistry of azo dyes. Photoisomerisation versus photoreduction from 4-diethylaminoazobenzene and 4-diethylamino-4′-methoxyazobenzene
作者:Angelo Albini、Elisa Fasani、Silvio Pietra
DOI:10.1039/p29830001021
日期:——
4-Diethylaminoazobenzene (2) and 4-diethylamino-4′-methoxyazobenzene (3) undergo geometrical isomerization with a quantum yield of almost unity by irradiation in the visible region, and, with lower efficiency, by irradiation at a shorter wavelength or sensitization both with high and low energy hydrocarbons. These dyes are also photoreduced, this time however only by irradiation at λ⩽ 313 nm and with
state. The photoisomerization is deduced by inversion mechanism because of the independence between the viscosity and the S1-state lifetime. The vibrationalcooling of the hot S0 state of cis-4-DEAAB occurs with ∼15 ps in acetone but is shortened to ∼6 ps in alcohols solvents. This shortening is due to the H-bond which forms easily in protic solvent and accelerates the flow of vibrational energy between
SUPERCRITICAL FLUID MICROENCAPSULATION OF DYE INTO LATEX FOR IMPROVED EMULSION AGGREGATION TONER
申请人:Sweeney Maura A.
公开号:US20110053076A1
公开(公告)日:2011-03-03
The present disclosure provides methods for incorporating a dye into latex particles via a supercritical fluid microencapsulation technique, in order to achieve improved dispersion of a colorant in the latex and an increase in color gamut.