1. What is the toughening agent?
Toughening agent refers to a substance that can increase the flexibility of the adhesive film. It can reduce the brittleness of composite materials and improve Generally speaking, any substance that can reduce brittleness and increase toughness without affecting other main properties of the adhesive is a toughener.
Usually a toughener is a monofunctional or multifunctional substance that generally contains active groups that can react chemically with the resin. It is not completely compatible after curing and sometimes separates into phases, which can cause A more ideal toughening effect is obtained, the heat deformation temperature remains unchanged or slightly decreased, and the impact resistance is significantly improved.
2. Are plastic tougheners dangerous goods?
No.
There are many types of plastic tougheners, but they are generally non-toxic and non-corrosive solids. They are non-dangerous goods and should be transported and stored as non-dangerous goods.
3. What are the characteristics of toughening agents?
1. The toughening effect at room temperature and the toughening effect at low temperature are both excellent, and have good effects on other mechanical properties. The impact is very small and the overall performance is excellent. In PC, adding 2% has a significant toughening effect.
2. It is well dispersed in polyester and has little impact on the fluidity of the toughened material (other grafted or copolymerized polyester toughening agents make the modified The fluidity of polyester becomes very poor and it is difficult to inject), which does not affect later injection. The toughened polyester is insensitive to shear during the injection process, which facilitates the selection of injection conditions.
3. Toughened polyester has excellent coloring ability and can reduce the amount of toner added.
4. PC toughened with MBS has good stress cracking resistance and improved sensitivity to water; even if it is thermally aged at 135°C for 168 hours, PC toughened with 5% MBS will The impact reduction is not large either.
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