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美国科腾Kraton SEBS G7820GU相关型号及产品介绍,应用介绍：

Bitumen has been used in construction since ancient times, thanks to its key waterproofing properties. Unmodified bitumen is a highly viscous liquid, and its tendency to become brittle at low temperatures and soft at high temperatures has limited its use.

For many decades, bitumen has been successfully used in asphalt concrete to pave roads. Despite continuous improvements to bitumen production processes, mix design and pavement design, there are limits to the extent that bitumen can surmount the challenge. Accelerating wear and tear caused by heavy traffic and harsh climates are taking a toll. In addition there are increasing demands for quieter and safer roads.

Polymer modification of bitumen is helping to overcome the challenges. Today, millions of tons of polymer modified bitumen is used by the global roads industry

Photo: Use of soft unmodified bitumen on a dyke to bind the stones and provide waterproofing. The flow patterns result from the non-elastic viscous characteristics of bitumen.

Bitumen is a complex mixture of hydrocarbons. It can be derived from a straight distillation of a single crude oil. However, it is usually a combination of the heavier products from different processes in a refinery, blended to obtain the right specification. Because of its complexity, the composition is expressed by determining the relative amounts of classes of molecules, asphaltenes and maltenes. 

Asphaltenes - these are polar aromatics which associate in large structures to give solidity at ambient temperatures.

Maltenes consist of:

相关型号：

G1654
G1657M
G1660H
G1726
G1780
G7723X
G7820GU

 SEBS改性PPO 

热塑性弹性体SEBS

SEBS具有优异的耐老化性能，既具有可塑性，又具有高弹性，无需硫化即可加工使用，边角料可重使用，*用于生产*弹性体、塑料改性、胶粘剂、润滑油增粘剂、电线电缆的填充料和护套料等。

1） 产品特性

SEBS是热塑性弹性体SBS的加氢产物，常称为氢化SBS。这种被氢化的SBS由于具有较高含量的1，2结构，在氢化后组成为聚苯乙烯（S）—聚乙烯（E）—聚丁烯—1（B）—聚苯乙烯（S），故简称为SEBS。

SEBS是1974年由Shell公司*在世界上实现工业化生产，商品名为KratonG。随着SEBS应用增长，参与SEBS开发、生产的厂商日益增多，到目前全球SEBS生产、销售能力达到20万吨，其中Shell公司11万吨/年，其余厂家生产能力共计9万吨左右。

巴陵石化有限责任公司合成橡胶厂于1996年开展相关技术研究，在2002年8月份实现了工业化生产，目前已开发出了6个牌号的SEBS干胶，并进行了SEBS的应用技术开发。