Abstract: A roofing composition for producing a roofing membrane having good bond strength, resistance to cracking, tensile strength and hardness, comprising 5-40% of asphalt and 60-95% of a block copolymer of the A-B-A type in which each end block A is formed from a vinyl aromatic monomer and midblock B is a hydrogenated polydiene or a polymer of the ethylene/propylene or ethylene/butylene type. A white top coating may be applied over the membrane without staining being visible through the top coating. Optionally the composition may also contain nonstaining carbon black, extender pigments, synthetic or natural resins to vary membrane film properties, and conventional additives, such as stabilizers and fire retardants.

Abstract: A method of constructing swimming pools is described which includes spraying a mass of foamable plastic against the exposed pool wall surface of an assembled pool which plastic material adheres thereto and hardens, forming a dense resilient foam mass with a hardened exterior skin facing toward the interior of the pool, and applying an ultraviolet protective covering to the skin to improve its resistance to light and moisture.

Abstract: A process for producing refractories wherein an impregnant is filled into open pores of the refractories. The impregnant is the thermoplastic resinous material which is obtained by removing a light fraction having a boiling point of less than 200.degree. C under a reduced pressure of 100 mmHg and having a benzene-insoluble fraction content of less than 10% by weight from at least one member selected from the group consisting of a heavy oil obtained by the steam cracking of petroleum and the polymerization product of said heavy oil. The slag penetration resistance, slag erosion resistance and slaking resistance of the impregnated refractories are improved thereby.

Abstract: This invention relates to a flat roofing.The flat roofing comprises: a lower support able to be submitted in use to deformations, an upper sealant covering, a disengagement sheet made of an elastic flexible and deformable material and arranged between said lower support and said sealant covering, lower adhesion zones connecting said disengagement sheet with the lower adjacent element of the roofing, in particular with said lower support, said lower adhesion zones being able to undergo horizontal relative displacements dependant on the deformations of said lower support, upper adhesion zones connecting said disengagement sheet with the upper adjacent element of the roofing, in particular with said upper sealant covering, and alternating with respect to said lower adhesion zones, and means for maintaining horizontally immobile said upper adhesion zones to one another.In said flat roofing the deformations of said under support have no effect on the said upper sealant covering.

Abstract: A bituminized roof sheet has particular dimensional stability and strength when containing a spun fleece of polyester filaments reinforced in a quite special manner as carrier. The roof sheet has the following properties:A. a tensile strength of from about 30 to 100 kp/5 cm,B. an elongation at break of from about 20 to 60 %,C. an elastic strain of from about 1 to 5 %,D. a tear propagating strength of from about 2 to 8 kp,E. a nail plucking resistance of from about 13 to 30 kp, andF. a flexural strength of more than 5000 cycles.

Abstract: A coated metal pipe which comprises a pipe coated with a composition comprising 5-30 wt parts of ethylene-vinylacetate copolymer having a vinylacetate content of 15-40 wt% and a melt index of 1-1,000 g/10 min; 2-20 wt parts of low molecular weight oxidized polymer of polypropylene or propylene-ethylene copolymer; 5-40 wt parts of styrene butadiene copolymer; 5-50 wt parts of a tackifier and 10-80 wt parts of asphalt.

Abstract: This invention provides a novel granular asphalt which comprises granules having the size of from about 0.074 to about 10 mm and being in the shape of a polyhedron having at least one acute angle. The granular asphalt has excellent properties. In particular, it can be melted rapidly and easily with small thermal capacity and slight heating, without causing thermal decomposition, denaturing and air pollution. The granular asphalt is useful, for example, for producing asphalt compound, cutback asphalt, rubberized asphalt, etc., for use in water-proofing, paving, sealing, etc., and for making asphalt block, asphalt tile, asphalt roofing, tarpaulin paper, flooring sheet, paint and varnish, etc.

Abstract: An impervious cover structure is produced by laying a polyolefin fabric fused on one side only, fused side against the surface to be covered, and the unfused side is coated with a mixture containing asphalt and asbestos fibers.

Abstract: A method for the fabrication of a mixture composed of a highly-viscous liquid phase and a thermoplastic and/or elastomeric material which is delivered to the liquid phase in the form of a comminuted solid phase and thereafter plasticized. Importantly, the plasticizing heat is primarily generated by friction internally of the mass. The apparatus for the performance of the method comprises a work container and a stirrer and/or comminution element arranged therein and driven at a high peripheral speed.

Abstract: A process for manufacturing impermeable strips formed by a plurality of layers in a continuous process wherein at least two single or compound flexible plastic layers e.g. polyethylene or thin webs are made to pass under pressure through the nip between two rollers rotating in opposite directions, the bonding material between the layers being asphalt, or an asphalt mixture, in fluid state distributed uniformly between the plastic surfaces to be joined, the heat of the fluid asphalt being prevented from deteriorating the plastic webs by their being cooled with the application of a water film to the respective surface of each plastic web opposite to the asphalt contacting surfaces.

Abstract: A reservoir containing layered liquids is lined with a liner comprising a reaction resistant material lining the portion of the reservoir in contact with a reactive liquid with the remainder of the reservoir lined with a material that is not resistant to reaction with the reactive liquid. In a specific embodiment asphalt impregnated nonwoven fabric is used to line a reservoir portion in contact with water and butyl rubber impregnated nonwoven fabric is used to line the portion of the reservoir in contact with a hydrocarbon liquid floating on top of the water layer. In a specific embodiment sheets of liner material are fastened together in a liquid proof seal produced by facing liner sheets to be joined together, overlapping the face sheets with a layer of nonwoven fabric, sewing through the four strata laminate thus produced, and treating the nonwoven fabric with a liquid proofing substance.

Abstract: Compositions are disclosed for making thermoplastic adhesives and coatings. The compositions include coal tar pitch and two copolymers of ethylene in which the copolymers are cross-linked with dicumyl peroxide.

Abstract: A method of applying a coating of a hot-melt adhesive to a substrate which comprises applying as the adhesive coating a composition which comprises (A) about 1 to 99 percent by weight of thermoplastic segmented copolyester elastomer consisting essentially of a multiplicity of recurring short chain ester units and long chain ester units joined through ester linkages, said short chain ester units amounting to about 15 to 75 percent by weight of said copolyester and being derived from aromatic dicarboxylic acid such as terephthalic acid, or a mixture of terephthalic and isophthalic acids, and an organic diol such as butanediol, and said long chain ester units amounting to about 25 to 85 percent by weight of said copolyester and being derived from aromatic dicarboxylic acid such as terephthalic acid, or a mixture of terephthalic and isophthalic acids, and a long chain glycol such as polytetramethylene ether glycol, said copolyester having a melt index of less than about 150 and a melting point of at least about 1

Abstract: Built-up roofing employing precoated felts are inhibited from slipping by the use of bituminous emulsions to bind the felts. A minor amount of a compatible latex is incorporated into the emulsion to increase the adhesion of the bonded felts.

Abstract: A novel self-adhesive type multi-layer laminated bituminous roofing membrane suitable for the formation of the roofing or waterproofing layer on roofs, floors and the like is provided. It comprises a base sheet of a sheet-like material, one or more bitumen layers coated on all or part of one or both faces of the base sheet, at least one layer of compound bitumen including both bitumen and rubber and/or resin laminated on all or part of the surface of said bitumen-coated layer on the base sheet and at least one release sheet laid over the whole surface of said compound bitumen layer.This roofing membrane is produced by uniting the bitumen-coated base sheet and the compound bitumen-coated release sheet, and can be applied over a substrate in a simple manner, without the step of melting or liquefying bitumen as in the conventional application process.