tailieunhanh - Rubber Compounding - Chemistry and Applications Part 8

Tham khảo tài liệu 'rubber compounding - chemistry and applications part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 7 Silica and Silanes Walter Meon Degussa Corporation Parsippany New Jersey . Anke Blume and Hans-Detlef Luginsland Degussa AG Cologne Germany Stefan Uhrlandt Degussa Corporation Piscataway New Jersey . I. INTRODUCTION The invention of synthetic amorphous silica in the late 1940s also marked the birth for the development of new rubber compounds with many more options and for creating new improved types of rubber. Silica s progress from a simple filler used for producing colored rubber compound to an important physical performance additive for substantially improving rubber compounds especially in tire applications took technically about 20 years. But it did not take long to learn that silica-containing compounds achieve significantly better tensile strength and tear strength. Therefore silica became an important physical reinforcement ingredient in all kinds of rubber goods in the 1950s and 1960s. Silica manufacturers started to develop and offer specific silicas for different rubber requirements. After the first success with commercially available mercaptopropyltrimethoxysilane in the late 1960s the polysulfidic silane Si 69 from Degussa was introduced in 1972 and set the benchmark for significantly improved silica-containing compounds. Silanes turned silica into an active chemical reactant in the rubber compound. An additional 20 years was necessary to Si 69 is a registered trade name of Degussa. Copyright 2004 by Taylor Francis commercially develop the silica and silane success story for the high-volume tire application that began in Europe. The use of silica-silane compounds grew slowly. The consumption of silanes in 1990 was below 3000 metric tons per annum t a . The introduction of the green tire from Michelin with a tread based on a silica from Rhodia formerly Rhone Poulenc and silane from Degussa was a real breakthrough in tire innovation. All tire manufacturers had to face this challenge. But also the silica manufacturers were obliged to offer .