Selection of silicone oil
So how do we all choose the right silicone oil for the actual application? Based on the above triangle diagram, see what you need, what is required, what kind of results you want:
For example, 1, if you require a particularly fine bubble holes, closed cell rate to be particularly high, then you choose to favor the role of nucleation ability of strong silicone oil, such as our company’s H-3625, H-350, H-3625A;.
2, if you use a particularly large amount of foaming agent, but also added a considerable amount of polyester, then you have to choose the emulsification ability of the silicone oil, such as our company’s H-3609, H-3618, H-3606, H-693, etc.;.
3, if you want to send out a high rate of square or large pieces of mold foam silicone oil, then you choose good fluidity silicone oil, such as our company’s H-3612, H-3625B.
4, if you want a better overall performance: do refrigerator material, with cyclopentane as a foaming agent, not only the requirement of the bubble hole also requires emulsification capacity, fluidity can not be too bad, then you choose my company’s H-3610, H-3633, H-360 and so on.
Different silicone oils have different characteristics, and different silicone oils have different focuses. You have to choose the suitable silicone oil for your system according to your raw materials and different applications. Silicone oil main function of the direction of the determination, and then according to the actual application needs, select the appropriate performance of the product, each main direction of the silicone oil have a series of fine-tuned products for users to choose to meet different needs. I think the choice of silicone oil is the same as finding a partner, there is no best, only the most suitable. You can’t ask for a silicone oil that has the best emulsification, the best fluidity, and the finest pores. To be honest, it is still hard to find such a silicone oil. You have to define your needs to find the right product.
5. Silicone oil test (at least two bubbles for each sample), I will talk about the most practical method:
Silicone oil test the most important test two aspects of performance:
5.1 Basic foam application
The most practical way to check the silicone oil is foaming, other methods are not too representative: choose a single polyether (only 4110), silicone oil plus 0.5 ~ 1%, foaming density of about 20kg, the speed of foaming is controlled in the starting speed of 15 ~ 20S or so, and the catalyst should not be selected too complex, only A-33 can be used. Comparison of foam pore structure and the length of the flow, which can be seen in different silicone oil effect differences. Each species should do two samples to repeat the comparison, the experimental results can be repeated to be meaningful.
5.2 Stability
Test the storage stability of silicone oil and combination of materials: with a good combination of materials, sealed up with a clean bottle, put into the oven at 60 ~ 70 ℃ for 48 hours, 96 hours, 120 hours were foamed, and not high-temperature storage combination of materials issued by the foam for comparison, such as bubble hole changes are not large, then your combination of materials placed at room temperature for 3 ~ 5 months will not be a problem. If the foam significantly larger, or even the collapse of the bubble, that means you with the combination of materials must have a problem.
Of course, if you are the same manufacturer of the same grade of silicone oil used more than five batches, then you can also be provided by the silicone oil manufacturers to test the physical properties of the indicators can be silicone oil manufacturers are not so intermediate casually dare to substitute good for bad, unless you ask for a substantial reduction in price that is also difficult to say.
However, I hereby declare that our Dongjun chemical certainly will not have such a situation, if you ask for a price reduction, we accounted for such as price reduction space, we can drop, if not that can not be done. If you do buy the same quality, the price is also very cheap silicone oil, it only means that we Dongjun to work harder, to provide you with more quality products at a lower price.
