polysulphide


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polysulphide

(ˌpɒlɪˈsʌlfaɪd) or

polysulfide

n
(Elements & Compounds) any sulphide of a metal containing divalent anions in which there are chains of sulphur atoms, as in the polysulphides of sodium, Na2S2, Na2S3, Na2S4, etc
References in periodicals archive ?
Tenders are invited for Supply of ammonium polysulphide 9000 kg at barauni refinery
They also demonstrated that polysulphide impression materials had much longer working time (4 to 6 minutes) and setting time (12 to 16 minutes) at 23C and 37C respectively, compared to vinyl polysiloxane (VPS), condensation silicone and polyether impression materials.
Polyurethane, polysulphide, and other acrylic polymers are among the popular waterproofing chemicals used in the market.
PCB contamination from polysulphide sealants in residential areas--exposure and risk assessment.
The 1-component brown polysulphide sealant H started showing fine map-like cracks, similar in size to those in sealant A (without a colouring agent);
Presently, only the polysulphide materials exhibit significant radiopacity due to their lead dioxide content.
The new products are MS sealant, which is environment-friendly, polysulphide sealant and structural glazing alkoxy silicone sealant.
The frame pieces are then combined with an IGU that was produced by separating two or more sheets of flat glass with an aluminum bar, filling the space between panes with argon, and sealing the chamber with a polysulphide sealant.
Since the equilibria between the different polysulphide oligomers are instantaneous (Steude1,1996) and despite our CE protocol could not detect all the polysulphides, tetrasulphide could still be relied upon to sense qualitatively the evolution of [S.
Lime sulphur is calcium sulphide or calcium polysulphide and should only be used early in the season as a dormant spray for prevention of black spot, powdery mildew and rust.
In the present paper, simulation is conducted to observe the changes in composition at different positions in a FGM that could be resulted from using both the single as well as multiple size particles under the influence of gravitational or centrifugal forces for silicon carbide (SiC) particles uniformly distributed in a thermosetting polysulphide epoxy resin, which is curing with time at constant temperature.
Besides, there are many farms and some polysulphide ore smelters inside this National Park.