Abstract: A laminate seam of flat rubber sheet material for roofing comprising two layers (10, 11) of the sheet material, at least one layer of which is uncured or cured, and one layer of a thermoplastic film (14) interposed between the overlapped edges (12,13) of the two layers of sheeting material to form a seam without the use of an adhesive. A method for covering a roof comprises the steps of applying a thermoplastic film (14) to the edge (12) of at least one layer of a flat rubber sheet material (10); applying a second layer of flat rubber sheet material (11 ) overlapping the thermoplastic film and the edge of the first flat rubber sheet material; heating the overlapped area to a temperature slightly above the peak melt temperature of the thermoplastic film; and, seaming the overlapped area under sufficient heat and pressure to provide an acceptable seam without the use of an adhesive.

Abstract: A laminate seam of flat rubber sheet material for roofing comprising two layers (10, 11) of the sheet material, at least one layer of which is uncured or cured, and one layer of a thermoplastic film (14) interposed between the overlapped edges (12, 13) of the two layers of sheeting material to form a seam without the use of an adhesive. A method for covering a roof comprises the steps of applying a thermoplastic film (14) to the edge (12) of at least one layer of a flat rubber sheet material (10); applying a second layer of flat rubber sheet material (11) overlapping the thermoplastic film and the edge of the first flat rubber sheet material; heating the overlapped area to a temperature slightly above the peak melt temperature of the thermoplastic film; and, seaming the overlapped area under sufficient heat and pressure to provide an acceptable seam without the use of an adhesive.

Abstract: Polyphosphazenes are stabilized against thermal degradation by the incorporation of a synergistic combination of certain picolinamides and a basic oxide such as MgO. In the absence of MgO from the formulation, the picolinamide is not effective as a stabilizer. A particularly preferred stabilizer is the reaction product of 3-hydroxypicolinamide and MgO.

Abstract: A process for preparing 2-allyl phenol from phenol comprising an in situ reaction between phenol and an alkali metal hydroxide to form alkali metal phenoxide, adding allyl chloride to said alkali metal phenoxide to form allyl phenyl ether, azeotropically distilling the mixture containing the allyl phenyl ether with an azeotropic solvent to remove various reactant by-products so that only the ether remains and thermally rearranging the allyl phenyl ether to produce 2-allyl phenol.

Abstract: When polyphosphazenes are exposed to elevated temperatures, their physical properties deteriorate. The addition of zinc bis hippurate to polyphosphazene rubbers has been found to result in improved retention of the physical properties of polyphosphazenes. Further the use of such an additive does not adversely affect the ability of peroxy compounds to cure the polyphosphazenes to form vulcanizates.

Abstract: It is known that polyurethane hydrolyzes in superheated steam.The oily hydrolyzate from a polyurethane derived from a polyether diol is filtered and stripped to remove the water and remove any unhydrolyzed water-insoluble polymer such as vulcanized rubber, etc. that may be present. There may be a substantial amount of scrap rubber present in the scrap polyurethane that is treated, such as the scrap from a plant producing rubber and plastic products, or scrap articles that may include rubber and polyurethane, such as mats, cushions, automobile parts, solid and pneumatic tires, etc., or scrap which contains old rubber and polyurethane products such as an accululation of scrap rubber tires and polyurethane tires, etc.

Abstract: Stabilization of poly(phosphazenes) against thermal degradation is achieved by the incorporation of suitable amounts of zinc 2-mercaptobenzothiazole in such polymers especially in compositions comprising such polymers and fillers for the same.