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188宝金博页面版: b-20—s的一些应用问题

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内容提示: This formulation is shown in one of documents from INDSPEC. Resorcinol or B-20-S is added at step 2. Generally, resorcinol can't be added in step1 due to its significant fuming under temperature as high as to 1 60-1 80℃. It' known to all that B-20-S is non-fuming, does it can be added in step1 ? Usually, B-20-S is used in some skim compounds. One of our customers told us that when mixed with B-20-S, the skim compound got blooming. We can't see the real conditions of blooming rubber, so it's not confirmed ...

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This formulation is shown in one of documents from INDSPEC. Resorcinol or B-20-S is added at step 2. Generally, resorcinol can't be added in step1 due to its significant fuming under temperature as high as to 1 60-1 80℃. It' known to all that B-20-S is non-fuming, does it can be added in step1 ? Usually, B-20-S is used in some skim compounds. One of our customers told us that when mixed with B-20-S, the skim compound got blooming. We can't see the real conditions of blooming rubber, so it's not confirmed whether the blooming is caused by addition of B-20-S. What's your comment? From some papers drawn by compounders, in the subsequent processing of skim compound, especially when calendering, compound mixed with resorcinol still has problem of fuming. We are confident that B-20-S can resolve this upsetting. What's your recommendations in the subsequent process? Additionally, we don't know how long B-20-S could be stored in normal conditions? 由于橡胶在一段混炼的温度有时可高达 1 60-1 80℃, 间苯二酚在这个温度下会产生显著的冒烟现象, 所以在通常情况下, 间苯二酚或 B-20-S 一般在二段混炼时加入; 但 B-20-S 不会产生冒烟问题, 可否在一段混炼时加入? 在胶料的后续加工过程中, 特别是在压延过程中, 用间苯二酚配合的胶料仍然会产生冒烟, 我们相信 B-20-S 可以解决这个问题; 但有用户在使用 B-20-S 时, 发现胶料有喷霜现象, 请问产生喷霜的可能原因是什么? 请问 B-20-S 在通常情况下存储时间有多长? 1 . Penacolite® Resin B-20-S can be added to the first mix stage without significant fuming. However we have seen slightly higher cured modulus if it is added in a later mix stage. Adhesion is not affected by which mix stage B-20-S is added. A B-20-S containing compound should not fume during calendering, however it might be slightly higher in Mooney viscosity than a resorcinol compound so other compound adjustments might be necessary if they cannot tolerate increased Mooney viscosity. 1 .Penacolite 树脂 B-20-S 可以在一段混炼时加入, 而不会出现显著的冒烟现象。 在后续混炼阶段加入时, 硫化胶的模量会稍微提高。 胶料的黏合力*不受 B-20-S 加入阶段的影响。 与含有纯间苯二酚的胶料相比, 用 B-20-S 混合的胶料其门尼粘度会稍微增加, 在压延时不会出现冒烟现象;如果用户不希望(用 B-20-S 混合的胶料) 门尼粘度增加, 那么就有必要做其它混配合方面的调整。 2. Penacolite Resin B-20-S does not usually bloom. Several things could be happening: a. Because B-20-S does increase Mooney viscosity, they might be running a higher temperature during mixing or calendering, which may lead to sulfur bloom. b. HMTA (hexamethylenetetramine) is very prone to blooming. If their formulation contains HMTA, this might be causing the problem. When changing from resorcinol to B-20-S it is necessary to lower the level of HMTA. If there is too much HMTA in the formulation, the excess will bloom. When using B-20-S we usually recommend a resin/HMTA ratio between 80/20 and 85/1 5 (i.e. 3 parts of B-20-S with 0.5-0.75 parts HMTA). We have the ability to analytically determine the composition of the bloom if you want to send a sample. 2.Penacolite 树脂 B-20-S 通常不会喷霜。 以下事项须引起注意: a.因为 B-20-S 会增加胶料门尼粘度, 在后续加工时用户可能会用升高加工温度的方式来降低粘度, 在相对较高的加工温度下会导致硫磺喷霜。 b.HMTA (六亚甲基四胺) 易发生喷霜。 如果胶料中含 HMTA, 可能会发生喷霜。 当用 B-20-S代替纯间苯二酚时, 须减少 HMTA 用量。 如果有过量的 HMTA 存在, 过量的部分就会造成喷霜。当用 B-20-S 进行配合时, 建议树脂/HMTA 比例在 80/20 和 85/1 5 之间(即 B-20-S 3 份,HMTA0.5-0.75 份) 。 如果用户可以送付喷霜胶料样品, 我们会检测出造成喷霜的原因。

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