Abstract: An isocyanate-functional prepolymer comprises the reaction product of: (A) a polyol; (B) an organopolysiloxane having at least two carbinol-functional groups per molecule; and (C) a polyisocyanate. Components (A) to (C) are utilized to provide a stoichiometric excess of isocyanate-functional groups in component (C) over the total amount of isocyanate-reactive groups of components (A) and (B). An isocyanate component comprising the isocyanate-functional prepolymer is also disclosed. The isocyanate component also comprises (E) a filler. In addition, a composition is disclosed, which comprises the isocyanate component and an isocyanate-reactive component. Further, a method of preparing a coating with the composition is disclosed, which method comprises applying the composition on a substrate and forming the coating from the composition on the substrate. A coated substrate comprising the substrate and a coating disposed on the substrate, the coating being formed from the composition, is additionally disclosed.

Abstract: This disclosure relates to a method for the in-situ encapsulation and/or insulation of piping using silicone-based compositions such as liquid silicone rubber materials and/or silicone foams. The method is useful for encapsulation and/or insulation of underground piping, particularly underground piping carrying high temperature (e.g., >120° C.) fluids, such as steam. The in-situ encapsulation and/or insulation may be done by inserting a hose into a pipe cavity so that a first end of the hose is remotely positioned next to the pipe and a second end of the hose is attached to a pumping system. A silicone composition is pumped through the hose and into the cavity surrounding from the remote first end of the tubing at a first predefined rate, and the hose is gradually withdrawn from the cavity at a second predefined rate. The silicone material is allowed to cure and become rigid, thereby encapsulating and/or insulating the pipe.

Abstract: This disclosure relates to continuous methods of making foamed silicone elastomers. This disclosure also relates to compositions used for forming foamed silicone elastomers. The compositions comprise: (i) an organopolysiloxane having at least two silicon-bonded unsaturated groups per molecule; (ii) an organohydrogensiloxane having at least two silicon-bonded hydrogen atoms per molecule; (iii) a hydrosilylation catalyst; and (iv) a physical blowing agent. Foamed silicone elastomers can be prepared from such compositions, using, for example, the methods disclosed herein.

Abstract: Silicone elastomer base compositions containing a stabilizer are disclosed that provide cured silicone elastomers having improved high temperature performance. The stabilizer comprises carbon black, calcium carbonate, iron oxide, and optionally zinc oxide.

Abstract: Silicone elastomer base compositions containing a stabilizer are disclosed that provide cured silicone elastomers having improved high temperature performance. The stabilizer comprises carbon black, calcium carbonate, iron oxide, and optionally zinc oxide.

Abstract: Fluorosilicone elastomer base compositions are disclosed containing a stabilizer that provides cured fluorosilicone elastomers having improved high temperature performance. The stabilizer comprises carbon black, calcium carbonate, iron oxide, and optionally zinc oxide. The stabilizer is particularly useful to prepare cured fluorosilicone elastomers for o-rings, connectors, and constructing automotive hosing.