Wear-resistant offset printing ink and preparation method thereof

Abstract

The invention provides a wear-resistant offset printing ink prepared from the following raw materials in parts by weight: 6-8 parts of propylene glycol methyl ether acetate, 2-2.5 parts of nano zinc oxide, 2-3 parts of polytetrafluoroethylene micropowder, 30-35 parts of rosin modified phenol-formaldehyde resin, 0.1-0.2 part of oxo-2-ethylhexanoato-o aluminum homopolymer, an appropriate amount of mineral oil, 50-55 parts of soybean oil, 0.1-0.2 part of tert-butyl hydrogen peroxide, 20-30 parts of a colorant, 1-2 parts of lanthanum ethylhexanoate, 1-1.5 parts of pentaerythritol ester, 1.3-1.6 parts of methyl methacrylate, 2-3 parts of acrylic acid, 1-2 parts of lac and 1-2 parts of polymeric castor oil. According to the offset printing ink provided by the invention, the soybean oil is used for replacing most of petroleum solvents in the traditional ink to ensure that the VOC (volatile organic compound) is reduced to be less than 15%, and nano zinc oxide is added to catalyze oxidation reaction and promote drying, so that the glossiness and toughness of the ink are improved. The ink is quick to oxidize and dry and cannot cause 'skin formation' in an ink fountain of an offset printing machine, and a film is quick to form.

Description

technical field [0001] The invention relates to the field of offset printing inks, in particular to a wear-resistant offset printing ink and a preparation method thereof. Background technique [0002] Offset printing ink is mainly a fluid coloring material composed of pigments, additives, polymers and solvents. Among them, the main solvents of offset printing ink are mineral oil and vegetable oil. The drying process of offset printing ink on paper is very complicated. We can understand that the ink is dried through the penetration of mineral oil and the oxidized conjunctiva of vegetable oil. [0003] Since the existence of offset printing ink, mineral oil has always been indispensable in offset printing ink. Usually, the content of mineral oil in common offset printing ink is 25%-45%. Mineral oil is a non-renewable resource extracted from petroleum, which contains aromatic hydrocarbons that are harmful to the human body. [0004] Now, some ink companies have successfully ...

AI Technical Summary

Problems solved by technology

However, because soybean oil is a semi-drying oil, there are problems such as poor ink dryness, difficult control of water-ink balance, and low production efficiency when soybean oil is used to replace petroleum solvent in traditional inks, so it needs to be improved.

[0005] The current soybean oil offset printing ink still has some rheological problems, such as thixotropy, adhesion, yield value, and properties such as friction resistance, crack resistance, antibacterial properties, and durability that need to be improved.