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The correct choice of rubber antioxidant
Source:不详Author:不详Link:http://不详Views:15times

1 heat resistance

橡胶的热老化是由自由基引起的一种氧化老化,胺类或酚类自由基阻止剂对防止这种老化效果较好。对于要求高度耐热性的制品,可选择二苯胺类防老剂和TMDQ等耐热防老剂。此外,将这些自由基阻止剂与防老剂MBI等过氧化物分解剂并用,可得到更加优异的耐热性。

Rubber aging heat aging is an oxidation caused by free radical, amine or phenolic radical blocking agent to prevent the aging effect is good. Requirements for products high heat resistance, can choose two aniline antioxidant and TMDQ heat-resistant antioxidant. In addition, the free radical inhibitor and antioxidant MBI peroxide decomposition agent and use, can obtain more excellent heat resistance.

2.耐屈挠龟裂性

2 flex cracking resistance

屈挠龟裂是由于自由基反应使制品表面产生氧化老化的结果。为防止这种形式的老化,选择胺类或酚类抗臭氧剂(自由基抑制剂)有一定作用。其中表面迁移性大的效果优异。

Flex cracking is due to radical reaction product surface oxidation aging results. In order to prevent the aging of this form, select the amine or phenolic antiozonant (free radical inhibitors) have a certain role. The surface migration of large effect is excellent.

3.耐臭氧性

3 ozone resistance

抗臭氧剂有对苯二胺类、TMDQ类、硫脉类和防护蜡等,一般将有污染性的对苯二胺类化合物与无污染性的硫脉类化合物和石蜡进行并用,可获得优异的效果。但是,硫脉类化合物具有显著加速焦烧的倾向。此外,臭氧老化系产生于制品表面,因此表面迁移性大的抗臭氧剂的效果优异。最近,为使抗臭氧剂能发挥持续作用,高分子量抗臭氧剂也在进行开发。

Ozone resistant agent on benzene two amine, TMDQ, thiourea and wax, generally there will be pollution and use of two benzene amine and thiourea compounds and no pollution of paraffin wax, can obtain excellent effect. However, thiourea compounds tend to significantly accelerate the scorch. In addition, ozone aging is produced in the surface of the product, so the surface mobility of antiozonant effect is excellent. Recently, in order to make the antiozonant can exert a lasting effect, high molecular weight antiozonant is also under development.

4.抗有害金属老化性

4 anti aging of harmful metals

抗有害金属老化剂可分为金属离子封闭剂和金属表面惰性剂。前者效果优异的有对苯二胺类和双酚类化合物,后者有硫醇类化合物(如防老剂MB)和三嗦类化合物。为了获得更优异的抗有害金属老化性,上述防老剂一般可与耐热防老剂并用。

Anti aging agent of harmful metals can be divided into metal ion sealant and metal surface inert agent. The former effect had excellent compounds on two benzene amine and bisphenol type, the latter with thiol compounds (such as antioxidant MB) and three long winded compounds. In order to obtain the resistance to harmful metal aging more excellent, the antioxidant can generally and heat-resistant antioxidant and.

5.抗光龟裂老化性

5 anti cracking aging

炭黑是优异的紫外线吸收剂。因此,抗光老化剂对于炭黑配合来说是不必要的,而对于浅色制品(炭黑仅作着色剂用)它是不可缺少的。对于抗光老化配合,一般采取第一防老剂和第二防老剂并用。在防老剂中,对苯二胺类防老剂抗光老化效果特别优异,但存在严重污染性。在非污染性抗光老化剂中,效果优异的有苯酚类、受阻胺类防老剂及石蜡。在酚类防老剂中,防老剂DTBM P(2,6一二叔丁基一4一甲基苯酚)、防老剂 sP(苯乙烯化苯酚)、防老剂MBMTB[2,2’-亚甲基双(4一甲基一6一叔丁基苯酚)]和防老剂MBETB[2,2气亚甲基双(4一乙基一6一叔丁基苯酚)]的抗光龟裂老化效果较优异。

Carbon black is excellent UV absorbers. Therefore, the anti-aging agent for the carbon black with it is not necessary, but for light products (only for carbon black colorant) it is indispensable. The light aging resistance, generally take the first and second antioxidants and antioxidant. The antioxidant, on two benzene amine antioxidant anti-aging effect is excellent, but there is a serious pollution. In non polluting the anti-aging agent, excellent effect of phenol, hindered amine antioxidant and paraffin. The phenolic antioxidant, antioxidant DTBM P (2, 6 Di tert butyl 4 methyl phenol), antioxidant sP (styrene phenol), antioxidant MBMTB[2, 2 '- methylene bis (4 methyl 6 tert butyl phenol)] and antioxidant MBETB[2, 2 gas methylene bis (4 ethyl a 6 a tert butyl phenol) anti light aging effect is excellent cracking.

6.石蜡的选择

The choice of 6 paraffin

配入胶料中的石蜡在硫化后喷出于制品表面,形成一层物理保护膜,有效地防止制品的臭氧龟裂。石蜡喷出于制品表面的状态,依其组成、所用橡胶配方(橡胶和添加剂种类)、温度而各异。因此,选择符合使用条件的石蜡是很重要的。

With the compound of paraffin in the sulfide sprayed out of the product surface, forming a layer of physical protection membrane, effectively prevent ozone cracking products. Paraffin injection for product surface state, according to its composition, the rubber formulation (rubber and additives), temperature and various. Therefore, choose to comply with the conditions of use of paraffin is very important.



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