Waxes
AssigneeSchumann-Sasol (Proprietary) Limited
InventorsDesmond Austin Young, Michelle Grant, Stefanus Johannes Strydom, Jacobus Lucas Visagie, Christiaan Frederick Reinecke, Nicolaas Russouw Louw
Life of this patent
Estimating the term…
Abstract
A process for modifying a wax comprising treating a wax to introduce a hydroxyl functionality, said treating being selected from the group consisting of grafting with an allyl alcohol, oxidizing the wax and hydrogenating the oxidized wax, reacting the wax with a peroxide and mixtures thereof, so as to form primary and/or secondary hydroxyl groups thereon, thereby to obtain a hydroxyl wax; and subjecting at least some of the hydroxyl groups of hydroxyl wax to alkoxylation to form a modified wax.
Claims18
A process for modifying a wax comprising treating a wax to introduce a hydroxyl functionality, said treating being selected from the group consisting of grafting the wax with an allyl alcohol, oxidizing the wax and hydrogenating the oxidized wax, reacting the wax with a peroxide and mixtures thereof, so as to form primary and/or secondary hydroxyl groups thereon, thereby to obtain a hydroxyl wax;
- and subjecting at least some of the hydroxyl groups of the hydroxyl wax to alkoxylation thereby to form a modified wax.
A process for modifying a wax comprising hydrogenating an oxidized wax to form primary and/or secondary hydroxyl groups thereon, thereby to obtain a hydroxyl wax;
- and subjecting at least some of the hydroxyl groups of the hydroxyl wax to alkoxylation, thereby to form a modified wax.
A process for modifying a wax comprising treating a wax to introduce a hydroxyl functionality, said treating being selected from the group consisting of grafting a heavy fraction of a Fischer-Tropsch derived hard wax with allyl alcohol to form primary and/or secondary hydroxyl groups thereon to obtain a hydroxyl wax comprising a wax with side chains carrying a propanol group, hydrogenating an oxidized Fischer-Tropsch derived wax having oxygen-containing primary and secondary functional groups to form primary and secondary hydroxyl groups thereon to obtain a hydroxyl wax which has a hydroxyl value in the range of 30 to 150 KOH/g, reacting a Fischer-Tropsch derived hard wax, or a light or heavy fraction thereof, with a peroxide, to form primary and/or secondary hydroxyl groups thereon to obtain a hydroxyl wax, and mixtures thereof;
- and subjecting at least some of the hydroxyl groups of the hydroxyl wax to alkoxylation to form a modified wax.
Dependencies are inferred from the claim text.