Water-soluble self-crosslinking acrylic resin composition and preparation method thereof

Abstract

The invention provides a water-soluble self-crosslinking acrylic resin composition. The water-soluble self-crosslinking acrylic resin composition is prepared from the following raw materials in percentage by mass: 40-50% of acrylic acid and derivative thereof as well as non-acrylic carboxyl monomers, 20-40% of solvent, 8-15% of water, 0.5-1.5% of initiating agent, 0.03-0.4% of molecular weight regulator, 3-8% of neutralizing agent and 0.1-0.5% of crosslinking agent, wherein the acrylic acid and derivative thereof as well as non-acrylic carboxyl monomers contain 0.2-1% of monomers containing carbonyl structures, 2-5% of monomers containing ring structures, 0-2.5% of acrylic acid carboxyl monomers, 2.5-5% of non-acrylic carboxyl monomers and 2.5-5% of hydroxyl monomers. The invention also discloses a preparation method of the water-soluble self-crosslinking acrylic resin composition. The water-soluble self-crosslinking acrylic resin composition is low in monomer residual quantity, wide in molecular weight distribution and good in resin resolubility, and basically reaches an industrial 0.8N / 15mm standard for the combined strength of OPP (oriented polypropylene) and PET (polyethylene terephthalate), so that the water-soluble self-crosslinking acrylic resin composition not only is suitable for PET composite packaging with compound printing ink printed in the OPP and low requirement for the combined strength, but also is suitable for paper printing.

Description

technical field [0001] The invention relates to the ink industry in the field of chemical industry, in particular to a water-soluble self-crosslinking acrylic resin composition as a basic raw material used in water-based ink, and to a preparation method of the composition. Background technique [0002] In recent years, with the development of society and the reduction of oil resources, people have paid more and more attention to environmental protection, and the country has become more and more strict on energy conservation and emission reduction. In traditional gravure and flexo printing and other solvent-based inks, the organic solvent content is as high as 40% to 60%, and its drying form is volatile drying. The volatilization of a large amount of organic solvents not only increases the printing cost, but also causes great waste. What is more serious is that the volatilization of a large amount of organic solvents such as toluene, xylene, methyl ethyl ketone, and ethyl ace...

AI Technical Summary

Problems solved by technology

Water-soluble solid resin adopts bulk polymerization. After the polymerization is completed, it needs to consume a lot of energy to remove the solvent used in the polymerization reaction. It has a high glass transition temperature, low molecular weight, and poor solvent release. It needs to be used in water and alcohol solvents. Neutralize with alkaline substances and grind with pigments; the glass transition temperature of water-dispersed resins and emulsions is lower than that of water-soluble solid resins, with high molecular weight, good solvent release, and good film-forming properties. Easy to demulsify and become invalid when frozen

The three are used in combination during production. The water-based ink produced by it has the advantages of less organic solvent release, flexible printing ink layer, and safe production. However, after the ink layer is dried, its water resistance and scrub resistance are poor, and it is easy to stick back when heated. , The disadvantage of poor storage stability

Silicone and epoxy cross-linking effects are good, but they all have the characteristics of poor stability and short shelf life of resin or ink. The most commonly used cross-linking of ketohydrazine is diacetone acrylamide and adipic acid diacetate used in emulsion self-crosslinking. The cross-linking of hydrazide, due to the embedding effect of the emulsion particles, has the disadvantages of slow cross-linking and curing speed and low cross-linking degree in the emulsion

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