Sulphur cement pre-composition and process for preparing such sulphur cement pre-composition
AssigneeShell Oil Company
InventorsJochem Okke Boer, Cornelis Hamelink, Guy Lode Magda Maria Verbist
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Abstract
The present invention provides a sulphur cement precomposition, comprising sulphur and at least a polysulphide-containing organosilane in an amount of at least 0.3 wt % based on the weight of the total composition, which polysulphide-containing organosilane is of the general molecular formula: (X3Si)mH(2n+l−m)Cn-Sa-Cn′H(2n′+l−m′)(SiX′3)m′ wherein a is an integer in the range of from 2 to 8, X and X′ each are, independently, a hydrolysable group, n and n′ each are, independently, an integer in the range of from 1 to 4, and m and m′ each are, independently, an integer in the range of from 1 to (2n+1).
Claims19
A sulphur cement pre-composition, comprising sulphur and at least a polysulphide-containing organosilane in an amount of at least 0.3 wt % based on the weight of the total composition, which polysulphide-containing organosilane is of the general molecular formula:
- (X3Si)mH(2n+1−m)Cn—Sa—Cn′H(2n′+1−m′)(SiX′3)m′ (1)
- wherein a is an integer in the range of from 2 to 8, X and X′ each are, independently, a hydrolysable group, n and n′ each are, independently, an integer in the range of from 1 to 4, and m and m′ each are, independently, an integer in the range of from 1 to (2n+1).
Dependencies are inferred from the claim text.