Method for preparing resin for high water resistant waterborne glass ink

Abstract

The invention discloses a preparation method of a water-based glass ink-used resin with high water resistance, which comprises the following steps: step A. under the protection of nitrogen, dehydrated polyether dihydric alcohol, modified epoxy polyester polyol and IPDI react with each other at certain temperature; during the reaction course, the end of the reaction is judged by measuring the content of NCO; when the reaction ends, an emulsifying hydrophilc agent is added to react for a period of time and then the temperature is reduced; step B. after aqueous alkali is added for neutralization, a diluting solvent is added for dilution so as to reduce the viscosity of the solution after neutralization; then, emulsification is carried out at normal temperature, the chain is extended by a chain extender and the diluting solvent is removed in vacuum to obtain a water-based polyurethane dispersoid; and step C. core-shell copolymerization is carried out after high-speed emulsification by adding polymerized monomers into the water-based polyurethane dispersoid, and then the acroleic emulsion resin modified by the polyurethane is obtained after the temperature is reduced.

Description

technical field [0001] The invention relates to a preparation method of resin for water-based glass ink with high water resistance. Background technique [0002] In recent years, due to the continuous growth of consumption demand for resources and energy, global resource shortages and soaring prices have resulted. The high-profit ink industry has become a low-profit industry. In addition, the ROHS directive implemented by the European Union and the environmental protection trade barriers set up by western countries for trade protection have accelerated the development process of my country's original solvent-based coatings to water-based coatings. Now the oil-based ink in the glass industry has also been gradually converted to water-based, and the current water-based ink resin is mainly water-based acrylic resin, because it contains a large number of hydrophilic groups, resulting in poor water resistance and boiling water resistance. The disadvantages such as low adhesion, c...

AI Technical Summary

Problems solved by technology

Now the oil-based ink in the glass industry has also been gradually converted to water-based, and the current water-based ink resin is mainly water-based acrylic resin, because it contains a large number of hydrophilic groups, resulting in poor water resistance and boiling water resistance. The disadvantages such as low adhesion, can not meet the requirements of the majority of users, so the production of a high water resistance resin has become an urgent problem to be solved at present