BAYER POLYMERS LLC HIGH PERFORMANCE THERBAN® XT PRODUCT EXPECTED TO ENHANCE PROPERTIES OF THERBAN® HNBR

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BAYER POLYMERS LLC HIGH PERFORMANCE THERBAN® XT PRODUCT EXPECTED TO ENHANCE PROPERTIES OF THERBAN® HNBR
14 October 2003 - Bayer MaterialScience AG

Background: HNBR is a high performance elastomer that was developed to meet the increasingly stringent demands of modern engineering applications.

Therban® XT is produced by selective hydrogenation of C=C in a carboxylated nitrile butadiene rubber (XNBR). Those carboxylic acid groups introduced to the backbone of HNBR are expected to further improve HNBR's superior mechanical strength.

Enhanced Properties:

Sharon Guo, (Manager, Therban R&D) says the recent commercial development of an HXNBR ---Therban® XT --- by Bayer Polymers offers a product with improved performance to the industry. In addition to expected improvements in mechanical and adhesion properties and abrasion resistance, Therban® XT based compounds also exhibit unusually high tear strength at high temperatures when compared with regular HNBR and other synthetic elastomers.

Applications:

The excellent abrasion resistance and the superior mechanical strength of Therban® XT make it highly desirable for oil well specialty applications.

Blending Therban® XT with regular Therban® results in rubber compounds with improved wear resistance and aging properties for use in drill bits and packer applications.

Therban® XT , or its blend with regular Therban® , is a good choice for automotive and industrial seals where heat/oil resistance and abrasion resistance are required.

The high modulus at low strain and good elongation of Therban® XT/Therban®/ZDA blend make it attractive in applications where high modulus and elastomer properties are required, as in roll covers and belts.

The presence of COOH groups in Therban® XT indicates it can be used as an adhesion promoter or an adhesive raw material.

The possibility of crosslinking Therban® XT with metal ions or other chemicals is expected to provide improved mechanical strength, oil resistance, ozone/heat resistance and elasticity to coating applications.

Excellent adhesion properties can be obtained using Therban® XT over a broad range of temperatures, especially in the higher temperature range.

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About: Bayer MaterialScience AG
Bayer Corporation, headquartered in Pittsburgh, is part of the worldwide Bayer Group, an international health care, nutrition and innovative materials group based in Leverkusen, Germany. Bayer employs 23,300 in North America with net North American sales of 8.8 billion euros in 2003. Bayer’s three operating business areas – HealthCare, CropScience and MaterialScience, improve people’s lives through a broad range of essential products that help diagnose and treat diseases, protect crops and advance automobile safety and durability.

Bayer MaterialScience AG is one of the world's largest producers of polymers and high-performance plastics. The main customers for Its innovative developments in coatings, adhesives, insulating materials and sealants, polycarbonates and polyurethanes are the automotive and construction industries, the electrical/electronics segment and manufacturers of sports and leisure goods, packaging, and medical devices.

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