做热熔胶的都知道，SEBS牌号选错，胶一撕就分层——一吨胶料没省下来，客户的退货单先到了。
SEBS是SBS加氢之后的产物，耐候、耐热、不黄变，做热熔压敏胶、密封剂、改性TPE都离不开它。可它正牌不便宜，一柜料压下来，胶厂的利润就薄了一截。
问题是SEBS副牌水更深：线性还是星型、苯乙烯含量多高、油充没充，差一点，胶的初粘、持粘、耐温全变。说白了，不是SEBS副牌不能用，是你没把它的牌号脾气摸透。
这篇把SEBS讲透：它和SBS到底差在哪，全球前三是哪几家，做胶做密封该怎么挑副牌。
把SBS加氢，胶就耐候不黄变
SEBS是苯乙烯-乙烯-丁烯-苯乙烯嵌段共聚物，本质就是把SBS中间的双键加氢饱和掉。加氢之后，耐紫外线、耐热、抗黄变能力上一个台阶，不用硫化就能用，回收也方便。做热熔胶、密封剂、塑料改性增韧、软触感TPE，都靠它。
做胶的圈子里常说：要耐候、要耐温、要不黄变，选SEBS；图便宜、室内短期用，才用SBS。
全球SEBS格局，头部集中：美国科腾（Kraton）常年领跑，手里的Kraton G系列是SBC行业的标杆；日本旭化成的Tuftec®是透明和医用级主力；中国台湾台橡（TSRC）的Taipol®在胶黏剂和改性上走量。日本可乐丽Septon®在第二梯队。三家都在非中国大陆。
副牌是同一支加氢聚合物，只是化验单某格浮动
SEBS副牌，是同一厂、同一牌号里，苯乙烯含量、门尼粘度或流动指标出厂检验小幅偏离的批次。加氢后的分子结构和正牌一致，还是原厂原生胶粒。
四条来源不变：开停车头尾料、牌号切换过渡料、工艺波动致单项超标的批次、副线尾料。
边界要分清：正牌全指标达标；副牌单项小幅浮动；回料是胶粒混炼后的边角再造粒，已经受过热历史，性能打折；再生料波动大。SEBS做胶怕苯乙烯含量和粘度飘——这俩直接决定初粘和持粘，飘了胶就分层。
副牌主题金句：SEBS副牌买错牌号，做出来的热熔胶一到冬天就脆、撕开就掉，一整批密封剂当场报废。
科腾：Kraton G，SBC行业的标杆
科腾是苯乙烯嵌段共聚物的老大哥，Kraton G系列牌号细分极细，做胶、做改性都能对上号。它的副牌多是粘度或苯乙烯含量小幅偏离的批次，基材一致。
做普通密封剂、非耐候要求的胶黏剂，挑它的精选副牌，成本能压下一块。
旭化成：Tuftec®，透明和医用级的主力
旭化成的Tuftec®在高透明、医用级SEBS上口碑很硬，做透明TPE和高要求胶黏剂用得多。它的副牌色相和透明度控制得细，做对透明要求不高的胶和改性件很稳。
台橡：Taipol®，胶黏剂市场的走量王
台橡是台湾SBC大户，Taipol® SEBS在热熔胶、沥青改性、塑料增韧上走量很大，供货稳。它的副牌批次规整，做一般工业胶、密封剂，性价比很实在。
SEBS副牌做胶，这三个坑别踩
头一条，苯乙烯含量和粘度要对号。做胶先定初粘、持粘需求，再选对应苯乙烯含量和粘度的副牌，别拿“差不多”的牌号硬凑。
再一条，耐候要求高的别硬上副牌。户外胶、需耐UV的密封，加氢牌号的耐候是配方本事，副牌单项超标先掉耐候。
还有一条，认准原厂大包装。SEBS颗粒容易吸潮、掺假，来路不明的“副牌”可能掺了SBS，做出来的胶夏天软、冬天脆。批次留样，小试一炉胶再放量。
科隆仓库现货｜SEBS送货
主推品牌：科腾、旭化成、台橡
主要牌号：Kraton G系列、Tuftec系列、Taipol系列
包装规格：大包装/小包装均有备货
仓库现货通常在4000吨上下
小包副牌备货600-900吨、箱装副牌备货250-450吨、大包料/吨包料备货2650-3150吨
供应保障：检测单随货
六条口诀，胶厂对号下单
1. 户外耐候、需耐UV——走正牌或高等级
2. 室内胶、普通密封剂——原厂副牌可以上
3. 先定初粘持粘需求——再选苯乙烯含量与粘度
4. 进厂小试一炉胶——初粘、持粘实测
5. 认准原厂大包装/小包装，防掺SBS
6. 批次留样，出问题能对上号
石家庄有家做建筑密封胶的客户，之前为压成本进过一批掺了SBS的“SEBS副牌”，结果夏天胶软得往下流、冬天一掰就裂，工地验收整批退回，一年赔进去小几十万。后来换成科腾和台橡的原厂副牌，进厂先小试测初粘持粘，再按炉放量，冬夏两季的胶性都稳了，退货率从12%压到0.8%以内，单吨胶成本还降了一截。
这就是选型的价值——SEBS副牌不是不能用，是得验对牌号、防住掺假。宁波市科隆新材料有限公司做进口大厂副牌料多年，这种“胶粘不粘、冬夏稳不稳”的案子，每年经手几十起，说白了就是帮你在量产前把那一柜胶料的脾气摸清。
做热熔胶的、做密封剂的、做TPE改性的，谁没被SEBS坑过？
是胶一撕就分层、客户整批退回？还是冬天脆裂、夏天流淌？或者买着买着买到掺SBS的料，胶性忽高忽低？
资料与数据来源
Dataintelo：SEBS Market（Kraton、Asahi Kasei、TSRC、Kuraray为头部，前五合计约52%-58%产能口径）
Chemical Research Insight：Top 10 Companies in the SEBS Market 2026（Kraton、Kuraray、TSRC合计约50%份额）
MarketPublishers：Global SEBS Market（Kraton、Kuraray、TSRC，前三约50%份额）
PW Consulting：Worldwide Transparent SEBS Market 2026（Asahi Kasei Tuftec®、TSRC Taipol®）
Anyone who makes hot melt adhesive knows that if the SEBS grade is chosen incorrectly, the glue will delaminate as soon as it is peeled — not saving a ton of material, and the customer's return order arrives first.
SEBS is the product of hydrogenating SBS. It is weather-resistant, heat-resistant, and does not yellow. It is indispensable for making hot-melt pressure-sensitive adhesives, sealants, and modified TPE. However, the genuine product is not cheap; when a container of material is purchased, the profit margin for adhesive factories becomes considerably thinner.
The problem is that SEBS grades are trickier: whether they are linear or star-shaped, the styrene content, whether they are oil-extended—all of these slightly different factors can completely change the initial tack, adhesive strength, and heat resistance of the rubber. In short, it's not that SEBS grades can't be used, it's that you haven't fully understood the characteristics of their specific grades.
This article explains SEBS thoroughly: how it really differs from SBS, which are the top three companies in the world, and how to choose secondary brands for making glue and sealants.
Hydrogenate SBS, and the adhesive will be weather-resistant and non-yellowing
SEBS is a styrene-ethylene-butylene-styrene block copolymer, which essentially means that the double bonds in the middle of SBS are hydrogenated. After hydrogenation, its UV resistance, heat resistance, and anti-yellowing properties improve to a higher level. It can be used without vulcanization and is easy to recycle. It is relied upon for making hot melt adhesives, sealants, plastic modification and toughening, and soft-touch TPE.
In the rubber industry, it is often said: for weather resistance, temperature resistance, and non-yellowing, choose SEBS; if you want something cheap and for short-term indoor use, then use SBS.
The global SEBS landscape is top-heavy: U.S. company Kraton consistently leads, with its Kraton G series being the benchmark in the SBC industry; Japan's Asahi Kasei's Tuftec® dominates the transparent and medical-grade segments; Taiwan's TSRC's Taipol® is widely used in adhesives and modifications. Japan's Kuraray Septon® is in the second tier. All three are outside mainland China.
The secondary card is the same hydrogenated polymer, it's just that a certain cell on the lab report is fluctuating.
SEBS secondary brand refers to batches from the same factory and same grade, in which the styrene content, Mooney viscosity, or flow indicators slightly deviate during factory inspection. The molecular structure after hydrogenation is consistent with the primary brand, and it is still the original factory's native rubber pellets.
Four sources remain unchanged: leftover material from the start and end of parking, transition material during grade switching, batches exceeding individual standards due to process fluctuations, and leftover material from secondary lines.
Boundaries must be clear: the main brand fully meets all standards; the secondary brand has minor fluctuations in individual items; reprocessed material is made from leftover rubber particles mixed and granulated, having already undergone thermal history, with discounted performance; recycled material fluctuates greatly. When making rubber with SEBS, beware of variations in styrene content and viscosity—these two directly determine initial tack and holding tack, and if they fluctuate, the rubber will delaminate.
Sub-brand key phrase: SEBS sub-brand purchased the wrong grade, the hot melt adhesive produced became brittle in winter and fell apart when torn, causing an entire batch of sealant to be scrapped on the spot.
Kraton: Kraton G, a benchmark in the SBC industry
Kraton is the big brother of styrene block copolymers. The Kraton G series has very fine grade distinctions, suitable for both adhesive and modification applications. Its sub-brands mostly have slight variations in viscosity or styrene content, but the base material is the same.
For making ordinary sealants and adhesives without weather resistance requirements, if you choose its selected secondary brand, the cost can be reduced by one yuan.
Asahi Kasei: Tuftec®, the mainstay of transparent and medical-grade products
Asahi Kasei's Tuftec® has a solid reputation for high transparency and medical-grade SEBS, often used in transparent TPE and high-demand adhesives. Its sub-brand offers careful control of hue and transparency, making it reliable for adhesives and modified parts that do not require high transparency.
Taiwan Rubber: Taipol®, the volume leader in the adhesive market
Taiwan Rubber is a major SBC customer in Taiwan. Taipol® SEBS has a large volume in hot melt adhesives, asphalt modification, and plastic toughening, with stable supply. Its secondary brand has uniform batches, suitable for general industrial adhesives and sealants, with a very cost-effective price-performance ratio.
SEBS sub-brands making rubber, avoid these three pitfalls
First point, the styrene content and viscosity must match. When making adhesive, first determine the initial tack and holding tack requirements, then select the corresponding grade with the appropriate styrene content and viscosity. Don't force a 'close enough' grade.
One more thing, don’t force secondary brands if high weather resistance is required. For outdoor adhesives and seals that need UV resistance, the weather resistance of a hydrogenated grade depends on the formulation itself; if a secondary brand exceeds an individual standard, it will lose weather resistance first.
One more thing: make sure to choose the original factory's large packaging. SEBS granules easily absorb moisture and can be adulterated, and unknown 'secondary brands' may contain SBS, resulting in rubber that is soft in summer and brittle in winter. Keep samples from each batch and test a small amount of rubber before scaling up production.
Cologne Warehouse Stock | SEBS Delivery
Main promoted brands: Coten, Asahi Kasei, Taiwan Rubber
Main grades: Kraton G series, Tuftec series, Taipol series
Packaging specifications: Both large and small packages are available in stock
The warehouse spot goods are usually around 4,000 tons.
Small package secondary brand stock 600-900 tons, box-packed secondary brand stock 250-450 tons, large package material/ton package material stock 2650-3150 tons
Supply Assurance: Test Report Accompanies Goods
Six key formulas, the glue factory places orders according to the numbers
1. Outdoor weather-resistant, UV-resistant—use genuine brand or high grade
2. Indoor adhesives, general sealants – original brand or secondary brand can be used
3. First determine the initial tack and holding tack requirements — then choose the styrene content and viscosity
4. Pilot test of one batch of glue in the factory — initial tack and holding tack measurement
5. Make sure to recognize the original factory large/small packaging to prevent mixing with SBS
6. Batch sampling, so problems can be traced back
There is a client in Shijiazhuang that produces construction sealant. Previously, to reduce costs, they purchased a batch of 'SEBS secondary brand' mixed with SBS. As a result, in summer the sealant was so soft that it flowed down, and in winter it cracked as soon as it was bent. When inspected at the construction site, the entire batch was returned, resulting in a loss of several hundred thousand over the year. Later, they switched to the original secondary brands from Keten and Taiwan Rubber. Before full production, they conducted small-scale tests to check initial tack and adhesion, then gradually scaled up according to the furnace. The sealant properties remained stable in both winter and summer, the return rate was reduced from 12% to below 0.8%, and the cost per ton of sealant also dropped significantly.
This is the value of selecting the right type—it's not that SEBS secondary brands can't be used, but the grade must be verified to prevent adulteration. Ningbo Kolon New Materials Co., Ltd. has been producing secondary materials from imported major manufacturers for many years. They handle dozens of cases like this every year, where 'the adhesive doesn't stick, or is it stable in winter and summer?' In short, they help you understand the temperament of that batch of adhesive before mass production.
Those who make hot melt adhesives, sealants, or TPE-modified products—who hasn't been screwed over by SEBS?
Does the glue separate into layers as soon as you peel it off, causing the customer to return the entire batch? Or does it crack in winter and flow in summer? Or do you end up buying material mixed with SBS, with the glue consistency fluctuating?
Sources of information and data
Dataintelo: SEBS Market (Kraton, Asahi Kasei, TSRC, Kuraray are the leaders, with the top five accounting for about 52%-58% of capacity)
Chemical Research Insight: Top 10 Companies in the SEBS Market 2026 (Kraton, Kuraray, TSRC together about 50% share)
MarketPublishers: Global SEBS Market (Kraton, Kuraray, TSRC, the top three about 50% share)
PW Consulting: Worldwide Transparent SEBS Market 2026 (Asahi Kasei Tuftec®, TSRC Taipol®)
