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
Viscoelastic properties of elastomeric impression materials: polysulphide, silicone and polyether rubbers.
Polyurethane, elastomeric coatings, expanded polyethylene, polysulphide sealants, and acrylic polymer are some of the important waterproofing chemicals.
Key statement: Process for the manufacture of an elastomer composition having a self-sealing property which is based on at least (phr meaning parts by weight per 100 parts of solid elastomer): a solid unsaturated diene elastomer; between 30 and 90 phr of a hydrocarbon resin; from 0 to less than 30 phr of filler; between 0.5 and 15 phr of thiuram polysulphide, in which, during a first stage or stage (a), a masterbatch comprising at least the solid unsaturated diene elastomer and between 30 and 90 phr of a hydrocarbon resin is prepared by mixing these various components in a mixer at a "hot compounding" temperature or up to a "hot compounding" temperature which is greater than the softening temperature of the hydrocarbon resin.
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.
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.
Conductivity and Emissivity of the Materials Used in the Frame Sections Conductivity Material [W x [m.sup.-1] x [K.sup.-1]] Emissivity Aluminum 160.0 0.2 Butyl rubber 0.24 0.9 Ethylene propylene diene 0.25 0.9 monomer (EPDM) Foam rubber 0.03 0.9 Glass 0.9 -- Glazing cavity (solid) 0.032 -- Insulation panel 0.035 0.9 Mohair 0.14 0.9 Polyamide (nylon) 0.25 0.9 Polysulphide 0.19 0.9 Polyvinylchloride (PVC) 0.17 0.9 Spacer foam 0.2495 0.9 Urethane 0.31 0.9 Vinyl (flexible) 0.12 0.9 Table 2.
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.