How should BYK A500 defoamer be tested? Urgent

1. BYK-A500 defoamer shake flask test method.

The shake flask test method mainly tests the defoaming time and inhibition performance of the defoamer, which can be said to be the most commonly used and fastest test method, but the test results may not be accurate, because the shake flask test can not fully simulate the situation of the production site, such as temperature, foaming system, etc., but because it is simple and convenient, it is the most used test method, which is a static defoaming test method, which is mainly used for testing in the sewage treatment industry.

2. BYK-A500 defoamer air drum method.

The air drum test method is a dynamic defoaming test method, which is mainly used for cyclic foaming and repeated foaming system to test, but this method is not suitable for use in coatings, because high-speed stirring will affect the results of the test, this test method is mainly used in fermentation, gas tank and other industries, mainly to observe the height of the foam to compare the performance of the defoamer.

3. BYK-A500 defoamer high-speed dispersion method.

The high-speed dispersion method is also a test method for dynamic defoaming, and the comparative data of high-speed dispersion is not to look at the foam speed or time, but to observe the density, and if the density is large, then the performance is poor; Low density indicates good performance. This test method is mainly used in the coatings and adhesives industry.

Hello, this defoamer is used for solvent-free and solvent-borne unsaturated polyester, epoxy and polyurethane resins, and the foam dissipates quickly when it is dropped on the foaming liquid surface during testing.

If diluted, this defoamer can be stored for no more than 8 hours, protected from light at room temperature, sealed and moisture-proof, and stored for 24 months.

BYK automotive coating defoamer is a foaming additive for the prevention and elimination of foaming in the production process of automotive coatings, which can be added before and after foaming, and can be stirred evenly.

It can also be used diluted, but the amount added after dilution remains the same.

In the process of using automotive coatings, if the foam cannot be eliminated in time, it will lead to defects such as shrinkage holes, shrinkage, and pinholes in the coating film, which will seriously affect the appearance and performance of the coating film.

BYK-A515 defoamer is a highly surface-active deaerator that wets glass fibers. In lay-up and jetting, it is often used in conjunction with BYK-A 555 or BYK-A 501. It should be noted that BYK-A515 is a highly surface-active deaerator for wetting glass fibers.

In lay-up and jetting, it is often used in conjunction with BYK-A 555 or BYK-A 501. The recommended dosage of additives is based on the total formulation dosage: -

To prevent air contamination during manufacturing and/or processing, it is recommended that the defoamer be added and stirred before adding other ingredients in the formulation. In some resin systems, defoamers can cause cloudiness of the final product.

Hello, chemical composition of this defoamer: foam-breaking polymer solution, silicone free, solvent: alkylphenylene propylene glycol methyl ether acetate 8 1

BYK-A 501 is a silicone-free defoamer that prevents foam formation during production, charging and application of solvent-based and solvent-free coatings.

BYK-A501 exhibits spontaneous defoaming properties and shows no adverse effect on interlayer adhesion when recoated.

BYK-A501 is designed for use in unsaturated polyesters, acrylates, vinyl acetate conjugates and oil-free polyesters. In addition, BYK-A501 also acts as a deaerator and leveling agent.

Chemical Composition: Foam-breaking polymer solution, silicone-free.

Solvent: Alkylbenzene propylene glycol methyl ether acetate 8 1

Additives: % of total formula dosage.

Typical physicochemical data: Non-volatile matter: 44 %.

BYK-066 N standard silicone defoamer can be used in all solvent-based systems and has a good balance of defoaming properties and compatibility for optimal defoaming with minimal incompatibilities.

BYK Type 066 automotive paint defoamers can also be used in industries such as anti-corrosion and marine coatings, architectural coatings, automotive refinishes, industrial coatings, can coatings, wood and furniture coatings, room temperature curing systems, printing inks, adhesives and sealants.

BYK automotive paint defoamer is an additive added in the production and processing process of automotive paint to remove foam and inhibit foaming.

It can be used in automotive coatings, automotive paints, automotive refinish paints, etc.

BYK-A550 is silicone-free and is used in solvent-free and solvent-borne unsaturated polyester systems and adhesives. Excellent deaeration performance, not easy to produce turbidity in unsaturated polyester resins, suitable for adhesives and sealants.

1. Test Method:

1. Prepare foaming solution. Take a certain amount of sodium dodecylbenzene sulfonate and dissolve it in distilled water to prepare a 5g l aqueous solution (can be heated to speed up the dissolution). The foaming solution is kept at a temperature of 20-22.

2. Prepare a dilution solution of defoamer. Take 1g of defoamer and add 20 of 19g of distilled water and stir well. (20-fold dilution).

3. The defoaming effect was characterized by the defoaming time. Take 50ml of foaming solution in a graduated cylinder with a stopper with a measuring range of 100ml, plug the cork tightly, shake the graduated cylinder vigorously up and down 30 times according to a certain frequency and a certain swing, quickly add 1g of defoamer dilution dropwise to the graduated cylinder, time, and record the time when the foam drops to the scale of 60ml, which is the defoaming time.

2. Qualified standards for imported defoamers from Guangbai:

Defoaming effect: The defoaming time is less than 18 seconds. Foam inhibition effect: the number of bubble inhibition is more than 12 times to qualify.

The defoamer test method is divided into dynamic defoaming and static defoaming test, if the blistering environment system is different, then the recommended test method is also different, and the main test parties are divided into the following three types:

1. Air drum method.

The air drum test method is a dynamic defoaming test method, mainly used for cyclic foaming, repeated foaming system to test, this method is not suitable for coating testing, because high-speed stirring will affect the results of the test, this test method is mainly used in fermentation, deflating pool and other industries, mainly observe the height of the foam to compare the performance of the defoamer.

2. Shake bottle test method.

The shake flask test method mainly tests the defoaming time and inhibition performance of the defoamer, which is the most commonly used and most intuitive test method at present, but the test results may not be accurate, because the shake flask test can not fully simulate the situation of the production site, such as temperature, foaming system, etc., but because it is simple and convenient, it is the most used test method, which is a static defoaming test method, which is mainly used for testing in the sewage treatment industry.

3. High-speed dispersion method.

The high-speed dispersion method is also a test method for dynamic defoaming, and the comparative data of high-speed dispersion is not to look at the foam height or the length of defoaming time, but to observe the density, and if the density is large, then the performance is poor; Low density indicates good performance. This test method is mainly used in the coatings and adhesives industry.

When added to the liquid according to the amount added, the effect of the defoaming speed can be observed, and after vigorous physical shaking, the antifoaming effect of the defoamer can be observed to see if the appearance of the liquid is affected. Comprehensive records and comparisons are sufficient.

First, look at the compatibility of defoamers;

After adding the defoamer to the product, observe the speed of stirring compatibility, observe whether the compatibility is good, and if the compatibility is not good, it will have an impact on the product.

Second, look at the defoaming effect of the defoamer;

After adding the defoamer, observe the speed of defoaming, the faster the defoaming speed is better with the same amount added.

3. Look at the antifoam inhibition time of the defoamer;

After adding the defoamer, observe whether there is a foam suppression function, observe the foam suppression time, and observe how long it will take for the product to foam again in normal operation after adding the defoamer.

Fourth, see whether the defoamer affects the quality of the product;

After adding the defoamer, observe whether the original product is affected, including quality and appearance, and what the affected procedures are.

Fifth, look at the amount of defoamer added (this is secondary).

Pay attention to statistics when adding defoamer, and count the effect of different addition amounts on defoaming and the impact on product quality while adding. After doing a variety of test statistics, select the best. When choosing a defoamer, the key thing to look at is whether the defoaming and foaming effect has an impact on the product quality.

6. Finally, make a high-quality selection of defoamer based on the above points.

Here's how to use this defoamer:

In order to avoid foam and bubbles in production and/or use, the deaerator should be mixed with a plasticizer during the preparation of plastisols.