傳統(tǒng)使用的受阻酚抗氧劑是以2,6-二叔丁基苯酚為母體的衍生物，稱作完全受阻酚。一般認為，受阻酚抗氧作用的關(guān)鍵在于它所含的反應(yīng)性羥基，大的叔丁基基團的空間位阻對酚羥基具有保護作用，可防止本身氧化損失。最新研究發(fā)現(xiàn)，酚羥基部位具有一個甲基和一個叔丁基的半受阻酚結(jié)構(gòu)足以對其自身提供保護，同時，由于從一定程度上削弱了受阻酚羥基的空間位阻，還可使新結(jié)構(gòu)的抗氧劑發(fā)揮出意想不到的效果。

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年代期末開發(fā)的代表酚類抗氧劑最高水平的優(yōu)秀新產(chǎn)品，廣泛應(yīng)用于聚烯烴、HIPS、ABS、聚氨酯、尼龍和聚縮醛等。半受阻酚與螺二醇結(jié)構(gòu)的有機結(jié)合，賦予產(chǎn)品良好的抗熱氧穩(wěn)定性。另外，由于AO-80自身分子量較高，可有效防止抽提和遷移損失，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.

圖1是幾種常見抗氧劑在PA-6中的使用效果，可以看出AO-80的抗氧效果明顯要好于目前廣泛使用的AN1098和AN1010?？寡鮿?/span>的效果還體現(xiàn)在某些樹脂老化時的減量，減量大小反映樹脂的氧化程度。圖2是不同抗氧劑在聚縮醛中140℃熱老化時的減量情況，從圖中可以看出，AO-80的性能也明顯優(yōu)于抗氧劑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與硫代酯類抗氧劑具有協(xié)同效應(yīng)。眾所周知，受阻酚抗氧劑作為鏈終止劑發(fā)揮抗熱性能，抗氧劑過程產(chǎn)生的氫過氧化物對聚合物的老化降解具有自動催化作用，而受阻酚本身不能夠分解氫過氧化物，所以常常需要同亞磷酸酯和硫代酯之類的輔助穩(wěn)定劑并用。當(dāng)受阻酚與硫代酯并用時，將發(fā)生協(xié)同效應(yīng)。聚合物（RH）在氧存在下分解為過氧化自由基（ROO·），受阻酚首先捕捉ROO·，而生成ROOH，硫代酯的存在可將ROOH分解成穩(wěn)定的ROH，從而抑制了ROOH存在時的自動催化作用。與單獨添加時相比，表現(xiàn)出了協(xié)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.

受阻酚與硫代酯的協(xié)同作用已被許多研究證實，最近的研究結(jié)果是，半受阻酚同完全受阻酚相比，與硫代酯的協(xié)同作用更為明顯

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也能夠抑制氮氧化物（一氧化氮、二氧化氮）的著色。

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

其獨特的雙酚結(jié)構(gòu)使其相對單酚抗氧劑，揮發(fā)和抽提損失少，穩(wěn)定性和防老化性能大大勝過傳統(tǒng)抗氧劑。

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與大多數(shù)聚合物有較好的相容性，尤其適用于聚酰胺、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溫條件下的黃變。

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.

該產(chǎn)品具有很好的熱穩(wěn)定性，可在高溫加工過程中對制品提供更好的顏色保護。

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

貯存與包裝：

本品按一般化工品運輸，注意防雨，防潮，貯于干燥通風(fēng)處。
25公斤紙箱；也可按客戶要求包裝。

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!