高效酚类抗氧剂-欧稳德 AO-80

传统使用的受阻酚抗氧剂是以2,6-二叔丁基苯酚为母体的衍生物，称作完全受阻酚。一般认为，受阻酚抗氧作用的关键在于它所含的反应性羟基，大的叔丁基基团的空间位阻对酚羟基具有保护作用，可防止本身氧化损失。最新研究发现，酚羟基部位具有一个甲基和一个叔丁基的半受阻酚结构足以对其自身提供保护，同时，由于从一定程度上削弱了受阻酚羟基的空间位阻，还可使新结构的抗氧剂发挥出意想不到的效果。

The traditional used hindered phenol antioxidants are derivatives of 2, 6-di-tert-butylphenol, called completely hindered phenol. It is generally believed that the key to the antioxidant effect of hindered phenols lies in the reactive hydroxyl groups contained in them. The steric hindrance  of large tert-butyl groups has a protective effect on phenolic hydroxyl groups and can prevent oxidation loss of itself. Recent studies have found that the semi-hindered phenol structure of a methyl group and a tert-butyl group in the phenolic hydroxyl group is sufficient to provide protection to itself. At the same time, the spatial steric hindrance of the hindered phenolic hydroxyl group is weakened to a certain extent, and the antioxidant with the new structure can exert unexpected effects.

OMNISTAB AO-80是80年代期末开发的代表酚类抗氧剂最高水平的优秀新产品，广泛应用于聚烯烃、HIPS、ABS、聚氨酯、尼龙和聚缩醛等。半受阻酚与螺二醇结构的有机结合，赋予产品良好的抗热氧稳定性。另外，由于AO-80自身分子量较高，可有效防止抽提和迁移损失，提高了抗氧化持久效果。

OMNISTAB AO-80 is an excellent new product which represents the highest level of phenolic antioxidants developed in the end of 1980s and is widely used in polyolefin, HIPS, ABS, polyurethane, nylon and polyacetal. The organic combination of semi-hindered phenol and spironediol gives the product good thermal and oxygen resistance stability. In addition, because AO-80 has a high molecular weight, it can effectively prevent extraction and migration loss and improve the anti-oxidation lasting effect.

图1是几种常见抗氧剂在PA-6中的使用效果，可以看出AO-80的抗氧效果明显要好于目前广泛使用的AN1098和AN1010。抗氧剂的效果还体现在某些树脂老化时的减量，减量大小反映树脂的氧化程度。图2是不同抗氧剂在聚缩醛中140℃热老化时的减量情况，从图中可以看出，AO-80的性能也明显优于抗氧剂AN1010，略好于AN245。

Figure 1 shows the application effect of several common antioxidants in PA-6. It can be seen that the antioxidant effect of AO-80 is significantly better than that of AN 1098 and AN 1010, which are widely used at present. The effect of antioxidant is also reflected in some resin aging reduction, the amount of reduction reflects the degree of oxidation of resin. Figure 2 shows the reduction of different antioxidants in polyacetal at 140℃ during thermal aging. It can be seen from the figure that the performance of AO-80 is also significantly better than that of AN 1010, slightly better than AN 245.

此外，AO-80与硫代酯类抗氧剂具有协同效应。众所周知，受阻酚抗氧剂作为链终止剂发挥抗热性能，抗氧剂过程产生的氢过氧化物对聚合物的老化降解具有自动催化作用，而受阻酚本身不能够分解氢过氧化物，所以常常需要同亚磷酸酯和硫代酯之类的辅助稳定剂并用。当受阻酚与硫代酯并用时，将发生协同效应。聚合物（RH）在氧存在下分解为过氧化自由基（ROO·），受阻酚首先捕捉ROO·，而生成ROOH，硫代酯的存在可将ROOH分解成稳定的ROH，从而抑制了ROOH存在时的自动催化作用。与单独添加时相比，表现出了协同抗氧效果。

In addition, AO-80 has synergistic effects with thioesters antioxidants. It is well known that hindered phenolic antioxidants play a role in thermal resistance as chain terminators, and the hydroperoxides produced in the antioxidant process have an automatic catalytic effect on the aging degradation of polymers. However, hindered phenols cannot decompose hydroperoxides by themselves, so they often need to be used together with auxiliary stabilizers such as phosphite esters and thioesters. Hindered phenols have synergistic effects with thioesters. The polymer (RH) decomposes into peroxidation radical (ROO·) in the presence of oxygen, and the hindered phenol captures ROO· at first and generates ROOH. The presence of thioesters can decompose ROOH into stable ROH, thus inhibiting the automatic catalytic action of ROOH in the presence of ROOH. Compared with the single addition, it showed synergistic antioxidant effect.

受阻酚与硫代酯的协同作用已被许多研究证实，最近的研究结果是，半受阻酚同完全受阻酚相比，与硫代酯的协同作用更为明显

The synergistic effect of hindered phenols and thioesters has been confirmed by many studies, and the recent results show that the synergistic effect of semi-hindered phenols on thiolesters is more obvious than that of completely hindered phenols.

OMNISTAB AO-80也能够抑制氮氧化物（一氧化氮、二氧化氮）的着色。

OMNISTAB AO-80 also inhibits the staining of nitrogen oxides (nitric oxide, nitrogen dioxide).

其独特的双酚结构使其相对单酚抗氧剂，挥发和抽提损失少，稳定性和防老化性能大大胜过传统抗氧剂。

Its unique bisphenol structure makes it less volatile than monophenol antioxidants, and its stability and anti-aging properties are much better than traditional antioxidants.

OMNISTAB AO-80与大多数聚合物有较好的相容性，尤其适用于聚酰胺、聚甲醛、聚丙烯、聚氨酯材料，在聚氨酯涂料中可有效防止涂料在高温条件下的黄变。

OMNISTAB AO-80 has good compatibility with most polymers, especially suitable for polyamide, polyformaldehyde, polypropylene and polyurethane materials, which can effectively prevent yellowing of coatings at high temperature in polyurethane coatings.

该产品具有很好的热稳定性，可在高温加工过程中对制品提供更好的颜色保护。

The product has good thermal stability and can provide better color protection during high temperature processing.

贮存与包装：

本品按一般化工品运输，注意防雨，防潮，贮于干燥通风处。
25公斤纸箱；也可按客户要求包装。

Storage and packaging:

Transport according to general chemical products, pay attention to rain and moisture proof and stored in dry and ventilated place.

25kg carton or as customer’s requirements.

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DELTACHEM(QINGDAO)CO., LTD explores all kinds of high performance additives with you to escort your products. For more information, please contact our sales team!