Wetting agent
The market supply of wetting agents such as JFC, JFCS, peregal series, EL series and AEO series, penetrant T, etc. are surfactants, wetting agents textile. Textile wetting agent are aliphatic carbon chain as a hydrophobic group, and the dye (pigment) in the chemical structure is not aromatic similar, low affinity, binding is not strong. Therefore, dyes (pigments) with a hydrophobic group is an aromatic hydrocarbon wetting agent applied to a strong anchoring manner dye (pigment) particle binding, and will not be placed during long fall from the particle surface Yan, stretch hydrophilic group providing electrical repulsion or steric repulsion in water.
The hydrophobic group is an aromatic hydrocarbon wetting agent with the dye (pigment) in the degree of integration of different particles to TX-10 and Solsperse27000 Example for comparison.
The TX-10, S-27000 and emulsifier obtained after 600 sulfated two hydrophilic groups within a molecule.
In addition to sulfuric acid esterification, the carboxylic acid is also esterified with many common organic pigment having a carboxylic acid polymer dispersant good compatibility.
To improve the affinity of the hydrophobic portion of the organic pigment, Beijing University of Chemical Research Tmeen20 徐燕莉 et aqueous carboxylate as phthalocyanine blue decomposing agent for surface modification.
In the above-described additive added at 0.5% to 3.0% phthalocyanine blue, and the critical surface tension σC (σSC) of 23mN / m to 34.8mN / m, 351% increase; water contact angle decreased from 82.4 to 47, 347% reduction, therefore, phthalocyanine blue in water greatly improved wettability, flowability after treatment 2.5 times, the dispersion stability in water by 29%.
The non-ionic surfactant through a carboxylic acid to give the corresponding products, as a dye (pigment) dispersion of both wetting surfactant.
Dispersant
Lignosulfonate dispersant to be most effective. Lignin sulfonate anionic surfactant is organized in 4 - methoxy propane polymerizable hydroxy plow and a sulfonic acid group, the average molecular weight of 8,000 to 13,000, in general the sodium salts, calcium salts - carboxy-3 , there are ammonium salt, is a polymer electrolyte.
Using lignin sulfonate salt, salt than other more effective to improve the solubility of the dye. The lignin sulfonate salt production in the country yet. Someone suggested using Borregards BorresperseAM-320; Reeds Lignosol TSF, Lignosol TSD, Lignosol TSF-65 and Lignosol SFX-65 and so on.
Water-based ink and water-soluble resins and additives for water-based ink pigment production of environmentally friendly water-based ink
Water-soluble resin: Domestic often used rosin modified maleic acid resin, a urethane resin, a styrene-modified maleic acid resin, polyvinyl alcohol and an aqueous amino resin and a water-soluble carboxymethyl cellulose, modified acrylic resins.
The aqueous ink additives with a surfactant.
There are several water-based ink additives: ① defoamers, water-based ink is used to eliminate the bubble, the amount is usually 1% to 2%. ② Ink stabilizer to prevent ink in the main storage, transport coalescence, mold can reduce ink viscosity and adjust the pH of the ink is generally used ammonia or ethanolamine. ③ There are other dispersing agents, preservatives, leveling agents, slip agents and crosslinking agents, etc., through the use of science to improve the aqueous ink additives such weakness, thereby improving stability of the aqueous ink.
The aqueous ink solvent
Preferably the basic aqueous ink formulation: 25% water-soluble acrylic ~ 35%, 15% to 25% water, 5% to 15% ethanol, 5% triethylamine, 10%, 10% to 30% of a pigment, an additive % to 3%.
Environmentally friendly water-based ink applications: environmentally friendly water-based ink is currently the most important application areas flexo printing and gravure printing, flexographic printing 95% of ink used, 80% of the gravure printing ink used. 2001 domestic production line of narrow flexographic printing 200, the annual water demand ink 100,000 t.