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Understanding water-resistant agents for coatings
Source: | Author:kesikeen | Publish time: 772 days ago | 434 Views | Share:
Waterproofing agents for paints are also known as water repellents. The early water repellents mainly used formaldehyde, glyoxal, urea-formaldehyde resin and melamine formaldehyde resin. Because of the unfavorable health of formaldehyde, it was restricted to use. With the increase of coating and printing speed, the use of water-based ink on the surface of the paper, anti-dry, wet pull strength requirements increase, these water-repellent agents can no longer meet the market needs, and our company developed according to market demand to meet the market needs of the three Anti-water agent. New polyamide polyurea type water repellent, glyoxal modified type and zirconium carbonate salt type.

The water-resisting agent for paints produces water-resistant and ink-absorbing principles. The reactive groups in the water-repellent molecules react with some of the hydroxyl groups and carboxyl groups in the coating composition to form cross-linked macromolecular resin film layers and cross-links. The volume shrinkage of the resin during the film process creates capillary pores between the pigments, which results in a balance of ink absorption during the printing process.

The example of successful application of glyoxal resin water-repellent agent produced by our company in coated paper is an example of the application of a paper mill in China in copper plate paper. The comparison of ordinary anti-water agent and the glyoxal produced by our factory The effect of water resistance agent

Application effect of glyoxal modified anti-water agent on coated paper