China cas no.:1533-45-5 Optical brightener for PVC
Optical brightener OB-1 china cas no.:1533-45-5 is the most commonly used whitening additive for many plastics, coatings, dyeing and finishing manufacturers. It has the characteristics of small addition amount and obvious whitening effect. Especially in the hands of recyclers of recycled materials, it is good for recycle products.
When PVC profiles are recycled, yellowing will basically occur. Some manufacturers will choose to use titanium dioxide for whitening, but after adding a large amount of titanium dioxide, they cannot be made into pure white. Because of the excessive amount of addition, the quality of the plastic has declined, which cannot be compared with the new material.
Optical brightener OB-1 china cas no.:1533-45-5 is a kind of optical reaction assistant, so adding Optical brightener OB-1 china cas no.:1533-45-5 to different plastic products will not change the properties of the product itself. It is a normal phenomenon that the thermally oxidized products of plastics become dark and yellow during processing, or yellowing caused by long-term UV attack and natural oxidation reaction.
The function of the Optical brightener OB-1 china cas no.:1533-45-5 is to improve the whiteness of the material itself, inhibit yellowing, and improve the weather resistance and anti-aging ability of the product.
After the Optical brightener OB-1 china cas no.:1533-45-5 is dispersed and mixed into the material at high speed, it absorbs the ultraviolet light in the light, converts it into blue-violet light and reflects it, and then mixes with the dark yellow light of the plastic particles to emit white light, thereby having a whitening and brightening effect. It is impossible to use titanium dioxide alone.
According to the application principle of brightener, we can know that after adding Optical brightener OB-1 china cas no.:1533-45-5, plastic products absorb part of the ultraviolet light, so the product reduces the ultraviolet light attack, and the weather resistance is naturally greatly improved.
After experiments, our company has obtained the results as shown in the figure. It can be seen in the PVC rigid recycled plastic board without Optical brightener OB-1 china cas no.:1533-45-5 that even though half of the new materials are used, the color will be dark yellow and matt, let Optical brightener OB-1 china cas no.:1533-45-5 all recycled materials are used.
After the addition of the Optical brightener OB-1 china cas no.:1533-45-5, the whiteness value has been greatly improved, and the color of the product can be improved according to customer requirements. The addition of OB-1 china cas no.:1533-45-5 in the PVC hard recycled material is per ton About 500g, the general added amount of PVC hard profile recycled materials is only about 200g.
The Optical brightener OB-1 china cas no.:1533-45-5 has good instantaneous whiteness, high fluorescence intensity, and a wide range of applications. It is also the most cost-effective Optical brightener OB-1 china cas no.:1533-45-5. Our company recommends an improved version of OB-1, which is more suitable for PVC profile.