Bubbling in water-based coatings not only affects aesthetics, but may also reduce the protective performance of the coating. To completely solve the problem, it is necessary to first identify the cause and then prescribe the right medicine. This article will systematically analyze the root cause of blistering and provide practical solutions to help you achieve a smooth and flawless paint film effect.
1. "Stirring too vigorously" - Bubble traps in the production process
2. "Improper construction" - the most easily overlooked cause of foaming
3. 'Material rebellion' - potential issues with the formula itself
1. Production process: Suppress bubbles in the cradle
Use a serrated stirring blade with a speed controlled between 800-1200rpm; Using the 'secondary addition method':
① Add 0.2% defoamer (such as Kemitech water-based coating defoamer) during the grinding stage
② Add 0.1% defoamer to suppress foaming during the paint mixing stage (such as Kemitech water-based paint special defoamer)
Let it stand for 30 minutes before discharging, or use vacuum defoaming equipment
2. Construction key: Details determine success or failure
Three step method for grassroots treatment: polishing → measuring moisture content (<10%) → applying sealing primer
Golden combination of construction parameters:
Problem type | recommended defoamer | characteristics | recommended dosage |
To produce foam | Chemitech water-based paint defoamer KM461 | economical and suitable for thick paste system | 0.3%-0.5% |
The application of foam | the defoamer KM220 of Chemitech water-based paint | can suppress foam for a long time without affecting the leveling | 0.1%-0.3% |
Micro bubble problem | KM403 defoamer for Chemitech water-based coating | no risk of shrinkage, preferred for high transparency systems | 0.05%-0.2% |
Conclusion: By mastering these three core strategies and using the correct defoamer, 90% of foaming problems can be easily solved. Suggest collecting this article as a technical manual and comparing and troubleshooting it when encountering problems! Do you need specific product recommendations or construction video guidance? Welcome to inquire: 086-19820415595, Manager Fang.
Guangzhou Chemi Tech New Material Co., Ltd.
Address : No. 3 Road, Lanshan Village, Xiancun Town, Zengcheng District, Guangzhou City
Contact : +86-19820415595(Manager Fang)
Tel : +86-13414362583(Manager Lee)
E-mail : crystal@gzchemitech.com