Abstract: A process for the preparation of a sulphur cement product is disclosed. Sulphur is mixed with a coupling agent and with a particulate inorganic material at a temperature at which sulphur is molten to obtain a molten sulphur cement product, which is solidified. The coupling agent is supplied as a solid composition comprising the coupling agent and at least 10 wt %, based upon the weight of the solid composition, of carrier material selected from one or more of wax, inorganic filler and polymer. The coupling agent is chosen from the group of organosilanes and organotitanates.

Abstract: A sleeve holder assembly for a radiation source is disclosed. The sleeve holder assembly comprises: an elongate radiation transparent sleeve element; a sleeve holder receptacle portion coupled to the elongate radiation transparent sleeve element; a sleeve bolt assembly portion coupled to the sleeve holder receptacle portion; a first sealing element disposed between the sleeve holder receptacle portion and the sleeve bolt assembly portion; and a locking element configured to prevent decoupling of the sleeve bolt assembly portion and the sleeve holder receptacle portion. The first sealing element is configured to provide a substantially fluid impermeable seal between the elongate radiation transparent sleeve element and the sleeve holder receptacle portion.

Abstract: A sleeve holder assembly for a radiation source is disclosed. The sleeve holder assembly comprises: an elongate radiation transparent sleeve element; a sleeve holder receptacle portion coupled to the elongate radiation transparent sleeve element; a sleeve bolt assembly portion coupled to the sleeve holder receptacle portion; a first sealing element disposed between the sleeve holder receptacle portion and the sleeve bolt assembly portion; and a locking element configured to prevent decoupling of the sleeve bolt assembly portion and the sleeve holder receptacle portion. The first sealing element is configured to provide a substantially fluid impermeable seal between the elongate radiation transparent sleeve element and the sleeve holder receptacle portion.

Abstract: A sulphur cement pre-composition, comprising sulphur, a first organosilane and a second organosilane, and a sulphur cement product comprising sulphur, a particulate inorganic material, a first organosilane and a second organosilane are disclosed. The first organosilane comprises one or more functional groups chosen from thiol, sulphide, amine or alkenyl groups. The second organosilane does not comprise any thiol, sulphide, amine or alkenyl groups. Processes for making the sulphur cement pre-composition and the sulphur cement product are also disclosed.

Abstract: A process for the preparation of a sulphur cement product is disclosed. Sulphur is mixed with a coupling agent and with a particulate inorganic material at a temperature at which sulphur is molten to obtain a molten sulphur cement product, which is solidified. The coupling agent is supplied as a solid composition comprising the coupling agent and at least 10 wt %, based upon the weight of the solid composition, of carrier material selected from one or more of wax, inorganic filler and polymer. The coupling agent is chosen from the group of organosilanes and organotitanates.

Abstract: A sulphur cement pre-composition, comprising sulphur, a first organosilane and a second organosilane, and a sulphur cement product comprising sulphur, a particulate inorganic material, a first organosilane and a second organosilane are disclosed. The first organosilane comprises one or more functional groups chosen from thiol, sulphide, amine or alkenyl groups. The second organosilane does not comprise any thiol, sulphide, amine or alkenyl groups. Processes for making the sulphur cement pre-composition and the sulphur cement product are also disclosed.