Shell has filed a patent for an additive composition that includes primary anti-oxidants (phenyl phosphite and 3,3′-thiodipropionic acid dioctadecylester) and a secondary anti-oxidant (epoxidized soybean oil). The invention aims to reduce short-term and long-term chemical aging of bituminous compositions, such as asphalt. GlobalData’s report on Shell gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Shell, was a key innovation area identified from patents. Shell's grant share as of September 2023 was 68%. Grant share is based on the ratio of number of grants to total number of patents.
An additive composition for reducing chemical ageing of bituminous composition
A recently filed patent (Publication Number: US20230303803A1) describes an additive composition for use in bituminous and asphalt compositions. The composition includes primary anti-oxidants and a secondary anti-oxidant. The primary anti-oxidants consist of a phenyl phosphite and 3,3'-thiodipropionic acid dioctadecylester, while the secondary anti-oxidant is epoxidized soybean oil.
The patent claims specify that the phenyl phosphite used in the composition can be either tris (2,4-ditert butyl) phenyl phosphite or tris phenyl phosphite. These primary anti-oxidants, along with the secondary anti-oxidant, are present in the bituminous composition at a range of 0.05%w/w to 2%w/w or 0.15%w/w to 1.75%w/w with respect to the bituminous composition.
The patent also mentions the use of the bituminous composition in an asphalt composition. However, several claims in the patent have been canceled and are not relevant to the composition and its application.
This patent presents a novel additive composition for bituminous and asphalt compositions. By incorporating primary anti-oxidants, such as phenyl phosphite and 3,3'-thiodipropionic acid dioctadecylester, along with a secondary anti-oxidant, epoxidized soybean oil, the composition aims to enhance the oxidative stability and durability of bituminous materials.
The specific selection of phenyl phosphite and its concentration range in the composition suggests that it plays a crucial role in preventing oxidation and degradation of the bituminous material. The addition of epoxidized soybean oil as a secondary anti-oxidant further enhances the overall anti-oxidant properties of the composition.
The patent's focus on bituminous and asphalt compositions indicates its potential application in the construction industry, particularly in road paving and maintenance. By improving the oxidative stability of these materials, the composition may contribute to longer-lasting and more resilient road surfaces.
Overall, this patent introduces a promising additive composition for bituminous and asphalt compositions, offering potential benefits in terms of durability and longevity. Further research and development may be required to validate the effectiveness and commercial viability of this composition in real-world applications.
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