Dyestuff preparations
a dye preparation and dye technology, applied in dyeing, textiles and papermaking, organic dyeing, etc., can solve the problems of affecting the color of printed fabric, affecting the quality of printed fabric, and many of the known dispersants are poorly biodegradabl
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example 6
[0102] Grindability of Dispersant 4 Compared with Dispersant 3
[0103] 15 g of Disperse Red 60, 7.5 g of polyethylene glycol (average molecular weight 400 g / mol), 15 g of dispersant 3 or dispersant 4, 0.4 g of a 50% by weight solution of glutaraldehyde and 0.5 g of a 47% by weight solution of tetramethylolacetylenediurea are bulked with water to a total weight of 100 g and pasted up in a mill. Thereafter, the pH is adjusted to 8.5 with 0.5 part of triethanolamine and subsequently the mixture is ground in a stirred media mill. The particle size following a defined energy input by the mill is determined and compared.
Dispersant 3Dispersant 4kWh / t×50×16×50×1620000.521.0030000.440.870.370.7440000.390.770.350.6950000.360.710.330.66
[0104] Here, x50 and x16 mean that respectively 50% and 16% of the particles have a size above the stated value. The above table reveals the grinding progress. It is clear that dispersant 4 gives a distinctly better grinding result than dispersant 3.
example 7
[0105] Preparation and Testing of Mixing Component
[0106] In a dissolver, 15.0 g of Disperse Red 60, 6.13 g of polyethylene glycol (average molecular weight 400 g / mol), 33.0 g of dispersant 4 used according to the present invention, 0.4 g of a 50% aqueous solution of glutaraldehyde, 0.5 g of a 4% by weight aqueous solution of tetramethylolacetylenediurea and 0.5 g of triethanolamine were mixed and made up with 35.56 g of demineralized water. This mixture was ground in a ball mill from Molynex for about 5 hours until the maximum particle diameter was 1 μm. 10 g of the mixing component was heated at 60° C. for 14 days, during which no signs were observed of disperse dye separating from the dispersion or of particle growth.
example 8
[0107] Making of an Ink
[0108] In a beaker, 40 g of the particular mixing component were mixed with 30 g of glycerol, 10 g of polyethylene glycol (average molecular weight 400 g / mol), 0.4 g of heptamethyltrisiloxane allyl alkoxylate copolymer and 119.6 g of demineralized water. The ink thus obtained was printed by an EPSON 3000 Stylus Color piezo head printer onto A3 paper. The prints obtained had excellent line crispness. There was no nozzle failure after 40 sheets of paper, nor after 10 m2 of printing in sustained use. The flow properties of the ink are excellent. The printing tests were repeated after the ink had been aged at 60° C. for 5 days; again, a satisfactory print and flow was observed. After aging of the ink at 60° C. for 21 days, no separation or disperse dye from the dispersion and no particle growth were observed. The surface tension of the ink was 34 mN / m and the viscosity 3.6 mPa s.
[0109] Similar results are obtained for example with inks based on Disperse Blue 72,...
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