Application of solid acrylic resin in water-based ink

Water-based inks are mainly uniform slurry substances consisting of connecting materials, pigments, additives and other substances. Water-based ink mainly uses water as a carrier so it has significant environmental safety: safe, non-toxic harmless, non-flammable and explosive, almost no VOC production.
color material: determines the color phase and saturation of water-based ink, ink stability, transferability, leveling, gloss, temperature and sun resistance
Water dispersion resin, which can make pigment particles evenly dispersed, so that the ink has a certain amount of fluidity, provide adhesion with the printing material, so that the ink after printing to form a uniform film layer, is an important factor affecting the quality of water-based ink .
: Water-based ink solvents are mainly water and a small amount of alcohol. Its role is to dissolve the resin, so that the oil has a certain amount of fluidity, in the printing process can be smoothly transferred, and appropriate adjustment of the viscosity and drying performance of the ink. Alcohols in solvents help to improve ink stability, speed up drying and reduce surface pressure.
water-like ink connection material
is the "heart" of water-like ink, playing the role of dispersing the color material. It is a key factor affecting ink performance, determining the fastness of ink attachment, water-resistant brush resistance, solvent resistance. Water-based ink connection can be divided into three types: water-soluble resin, hydrolytic resin, water dispersion resin. Due to the different properties, three resins are combined during ink preparation.
Three kinds of connection material performance comparison
water-soluble resin can be permanently dissolved in water, water resistance is very poor, with this resin prepared water-based ink can not be used in the environment can be directly exposed to water, use is limited, so water-soluble resin can not be used as the main raw material of water-based ink connection material. Because of its low relative molecular weight, small particles, good uniformity and other advantages, mainly used to regulate the viscosity of water-like inks, mobility and dispersion pigments.
sol resin is the use of acidic resin through a low molecular weight of amine neutralization to form salts, the method of producing hydro-water-based group preparation, can also be called alkali soluble resin. The resin drys into film quickly. Belongs to this kind of resin has insect glue, ethyl amino acid resin, water-based amino resin, water-soluble acrylic resin.
dispersion resin is also known as emulsion resin. With this kind of resin as the water-based connection material, the ink dilution is good, the drying speed is fast, the coating film is water resistant, and the emulsion mucus is low, the solid content is high, can form a high-performance coating. However, water-based inks made of emulsion resin have poor solubility and are difficult to clean.water-based solid acrylic
water-based printing inks are composed of acrylic co-polymer emulsions, solid acrylic resins, pigments and moisturizers, and deblgants. Acrylic co-polymer emulsion is the main connecting material, solid acrylic resin for pigment dispersant, the industry is called dispersion resin.
In water-based printing inks, the use of solid acrylic resins is mostly alkali-soluble resins, due to the composition containing about 30% acrylic or methyl acrylic acid, dissolved by alkali, and immediately converted into a large molecular surfactant with emulsification, wetting and dispersion function, and for a variety of extreme Low-quality substrates, such as PE film, PP film and aluminum coating film have excellent attachment fastness, so solid acrylic resin is an important functional additive in the entire water-based ink preparation process, not only in the emulsion connection preparation process, but also in the ink preparation process consumption is also considerable.
function of water-based solid acrylic resin is to provide dispersion to a variety of hard-to-disperse pigments, improve color display and film-forming properties, so in the field of water-based brush ink manufacturing water-based solid acrylic resin is the best pigment dispersion connection. Water-based solid acrylic resins, also known as alkali-soluble acrylic resins, are mainly molecular weight (Mw) and its distribution (PDI), acid value and glass temperature (Tg), molecular weight and acid value on the performance of resins can be seen Figure 1-1, resin glassing temperature and film-forming properties, when the glassification temperature is higher, the resin has a higher hardness, gloss and weather resistance, but can not form a continuous film; According to different actual needs, different molecular weights and their distribution, acid values and glassy temperature of the water-based solid acrylic resin can be synthesized.
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