Ultralow-dry coating weight high-temperature resistant release agent

Abstract

The invention belongs to the field of printing coatings and provides an ultralow-dry coating weight high-temperature resistant release agent, the ultralow-dry coating weight high-temperature resistantrelease agent comprises the raw materials of a waterborne polyurethane resin emulsion, a water borne cellulose nitrate emulsion, a waterborne organic silicon resin emulsion, and a solvent; the invention further provides a preparation method and an application of the ultralow-dry coating weight high-temperature resistant release agent.

Description

technical field [0001] The invention belongs to the field of printing coatings, and more relates to a high-temperature-resistant water-based release agent with ultra-low coating dry weight, a preparation method and application thereof. Background technique [0002] Release agent, also known as anti-sticking agent, is used between the substrate and the pressure-sensitive adhesive layer. Its main function is to protect the pressure-sensitive adhesive layer coated on the substrate to prevent the pressure-sensitive adhesive layer from being polluted or sticky. Invalid for other items. Whether it's labels, baking paper, self-adhesive envelopes, or hygiene products, release coatings are the unsung heroes of the entire paper industry. Many everyday applications involving pressure sensitive adhesives would not exist without a release coating. [0003] At present, because the solvent-based release agent contains a large amount of volatile and toxic solvents, a large amount of toxic...

AI Technical Summary

Problems solved by technology

[0003] At present, because the solvent-based release agent contains a large amount of volatile and toxic solvents, a large amount of toxic gases volatilize into the atmosphere during the production process, causing serious pollution to the ecological environment. Although the transfer film has been baked in an oven, most of the solvents have been Volatile, but there are still some solvent residues, which will cause serious harm to the human body when it is used for the outer packaging of cigarettes, alcohol, medicine, textiles, leather, etc.

The patent application number CN103254706A discloses a water-based release agent and a preparation method thereof. The formula components (parts by mass) of the water-based release agent are: 25-35 parts of water-based acrylic resin, 50-70 parts of deionized water, 1-4 parts of crosslinking agent, 0.1-0.5 parts of defoamer, 1-5 parts of ethylene glycol, 0.1-0.5 parts of modified polyurethane, 0.1-0.6 parts of ammonia water with a mass concentration of 15%, safe and environmentally friendly, no pollution, However, the coating dry weight of the currently prepared water-based release agent is relatively high, at 1.0g / m 2 Above, it is difficult to meet the requirements for the low coating of the release agent; the patent application number CN104695278A discloses a hot stamping release agent and its preparation method and application, and the composition of the hot stamping release agent in mass percentage: 1 - 6% oxidized polyethylene wax, 20-50% toluene, 10-20% xylene, 3-10% methylal and 10-40% methyl ethyl ketone, the coating dry weight of hot stamping release agent prepared by it 0.03-0.3g / m 2 , but the organic solvents used are toxic and smelly, which will cause great harm to the health of the staff and the ecological environment. Due to the high boiling point of the solvent, it is difficult to volatilize completely, and it will cause serious harm to the human body during contact.