Abstract: Thermosetting resin composition comprising an unsaturated thermosetting polyester resin and a thermosetting organo-silicone compound which can react with the thermosetting polyester resin by cross-linking to establish chemical bonds between the thermosetting polyester resin and the thermosetting organo-silicone compound for forming a solid polyester/organo-silicone thermoset resin product with a network of cross-linked chemical bonds. The thermosetting organo-silicone compound preferably is a thermosetting organo-silicone elastomer; the composition preferably contains a low-profile or low-shrinkage additive; and the polyester resin preferably is associated with an unsaturated monomer for cross-linking therewith. The resin composition is useful for the production of "dough" moulding compounds, sheet moulding compounds, bulk moulding compounds, high strength moulding compounds, and thick moulding compounds.

Abstract: A pipe fitting having an improved means of securing a polymeric pipe thereto, wherein the first part of the pipe fitting comprises a head, a tail extending downstream of the head, an annular ridge surrounding the tail downstream of the head, and a male thread between the ridge and the head. A nut arranged to engage the first part of the pipe fitting, has a number of resilient spaced fingers extending upstream from an outwardly diverging mouth. The fingers have portions of a female movement which engage the male thread to resist upstream movement of the nut, but which can disengage and slide ("ratchet") over the male thread if the nut is moved in a downstream direction.