Organic fillers with thioether linkages

An organic filler comprising a 14C-content in a range of from 0.20 to 0.45 Bq/g of carbon and a BET surface area in a range of 10 to <200 m2/g,

• wherein at least a part of the hydroxyl groups being present in the chemical structure of the organic filler, which are bonded to at least one aliphatic carbon atom, has been substituted with a covalently bonded sulfur atom(s)-containing organic residue, wherein at least one sulfur atom is adjacent to a carbon atom within said organic residue, such that aliphatic carbon-sulfur-carbon linkages in the chemical structure of the organic filler have been formed and are present.