Abstract: A one-part room temperature vulcanisable (RTV) silicone composition is provided. The one-part RTV silicone composition comprises a polyorganosiloxane polymer comprising at least two hydrolysable groups per molecule, anhydrous reinforcing filler(s), cross-linker(s), a tin (iv) based condensation catalyst and one or more low molecular weight linear or branched nitrogen containing compounds. The compounds are selected from amidines, guanidines and other alkyl amines and alkyl polyamines. The composition is designed to be storable for at least 6 months at a temperature (T° C.) in a range of between 0° C. and 25° C. inclusive.

Abstract: A mixture curable in the presence of a suitable metallic catalyst to provide an intumescent coating material. The mixture comprises: a siloxane polymer; a cross-linker for cross-linking the siloxane polymer; filler, wherein the filler comprises char reinforcing filler; and an intumescent ingredient. The intumescent ingredient comprises a phosphorus containing compound or a composition comprising a phosphorus containing compound. The mixture comprises 5 to 20% by weight of the phosphorus containing compound or composition comprising a phosphorus containing compound. The intumescent ingredient comprises 10 to 40% by weight expandable graphite.

Abstract: A condensation cure organosiloxane composition is disclosed. The composition may be used as an electrically insulating sealant and/or adhesive. The composition is a silicone elastomer composition comprising: (a) a polydiorganosiloxane having at least two —OH or hydrolysable groups per molecule; (b) a cross-linker which will cross-link polydiorganosiloxane (a); (c) a filler component comprising (i) a maximum of 25% by weight of the composition of calcium carbonate and/or silica, and (ii) an amount of one or more fibrous fillers selected from mineral fibers, bulk fibers, refractory fibers, basalt fibers, or mixtures thereof; (d) a condensation curing catalyst; and optionally (e) one or more additives. Upon cure, the composition provides a silicone elastomer having a volume resistivity which is ?2×1015 ?·cm.

Abstract: A condensation cure organosiloxane composition is disclosed. The composition may be used as an electrically insulating sealant and/or adhesive. The composition comprises: (a) a polydiorganosiloxane having at least two —OH or hydrolysable groups per molecule; (b) a cross-linker which will cross-link polydiorganosiloxane (a); (c) a filler component comprising calcium carbonate; (d) a filler treating agent comprising one or more carboxylated liquid organic polymers; (e) a condensation curing catalyst; and optionally (f) one or more additives. Upon cure, the composition provides a silicone elastomer having a volume resistivity which is ?2×1015 ?·cm.

Abstract: A condensation cure organosiloxane composition is disclosed. The composition may be used as an electrically insulating sealant and/or adhesive. The composition comprises: (a) a polydiorganosiloxane having at least two —OH or hydrolysable groups per molecule; (b) a cross-linker which will cross-link polydiorganosiloxane (a); (c) a filler component comprising calcium carbonate; (d) a filler treating agent comprising one or more carboxylated liquid organic polymers; (e) a condensation curing catalyst; and optionally (f) one or more additives. Upon cure, the composition provides a silicone elastomer having a volume resistivity which is ?2×1015 ?·cm.

Abstract: This invention relates to the use of silyl terminated organic polymers in phenylorganosiloxane based silicone sealant formulations containing silyl terminated organic polymers are described. Subsequent to cure the compositions, provide sealants exhibiting superior mechanical properties, particularly with respect to elongation, tensile strength and adhesion on glass. The composition comprises a phenylorganosiloxane having terminal groups selected from —OH or hydrolysable groups and unsaturated groups. Typically the phenylorganosiloxane has a viscosity of at least 10000 mPa.s at 25° C. Other ingredients include either: (i) one or more organic polymers having terminal and/or pendent silyl groups containing —OH functional groups or hydrolysable functional groups, or (ii) one or more organic polymers having terminal and/or pendent silyl groups containing one or more unsaturated groups, selected in accordance with the terminal groups of (a) as well as fillers, cross-linkers and catalyst.