Causes of Foaming in Putty Powder and Solutions
Release Time:
2016-08-22
Source:
Causes of Foaming in Putty Powder and Solutions
Causes of Foaming in Putty Powder and Solutions
Putty powder is a type of architectural decorative material whose main components are talc and adhesive; the adhesive is the most critical constituent of putty, primarily serving functions such as bonding. The most commonly used binders in putty are cement and organic polymers, with organic polymers further classified into emulsions and latex powders. Foaming in putty powder is inevitable because it contains additives such as binders and activators, all of which generate substantial amounts of bubbles during application.
Foaming in putty powder can easily lead to quality problems during the application of paint and latex paint.
Defoamers are suitable for defoaming under strongly acidic or strongly alkaline conditions. In such environments, the putty powder defoamer maintains excellent physical stability—no emulsion breakdown, no oil floating—and exhibits even stronger defoaming and foam-suppressing performance than at ambient temperature. It defoams rapidly, suppresses foam persistently, is non-toxic and odorless, and causes no environmental pollution. Moreover, only a small dosage is required, resulting in low application costs. The product can be added directly to the foaming system; prior to use, ensure thorough mixing. The recommended addition level is 0.05% to 0.3%, with the final dosage determined based on actual performance. Since foaming behavior varies across different systems and can arise from multiple causes, it is essential to identify and address the root cause of foaming.
Specifically, the problems that can be avoided by adding a water-based defoamer to coatings include the following:
1. Foam can affect production schedules and product output.
2. An excessive number of bubbles can lead to the loss of production raw materials, thereby increasing production costs.
3. Foaming can introduce defects of varying severity into the finished coating film.
4. An excessive number of air bubbles can impede normal paint production and the smooth execution of application work.
