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Insulating polymer concrete
Molding composition Gaughan, R.G. (Phillips Petroleum Company, Bartlesville, OK, USA) US Pat 4 689
098 (25 August 1987) A composition comprising a met of nonmetallic reinforcing fibres and a distribution of nonwoven metal whiskers or fibres of a ductile conductive metal or metal alloy carried on the mat is claimed. Mat structure Smoot, M.A., Batch, H.W. and Das, B. (PPG Industries, Inc., Pittsburgh, PA, USA)
US Pat 4 689 255 (25 August 1987) A glass fibre containing composite mat having many glass fibre strands affixed to a fluid permeable sheet, is described. Insulating polymer concrete Schorr, H.P., Fontana, J.J. and Steinberg, M. (The Brooklyn Union Gas Company, Brooklyn, NY, USA) US Pat 4 689 358 (25
August 1987) The title material comprises a lightweight aggregate selected from the group consisting of hollow aluminium silicate spheres, expanded perlite coated with polyester resin and mixtures of both, an epoxy resin binder and a hydrated particulate flame retarding agent. Enhanced water resistance and crush strength, and increased flame retardency are claimed.
PROCESSES Method for impregnating a thermoplastic polymer Sand, M.L. (Hercules Incorporated, Wilmington, DE, USA) US Pat 4 678 684 (7 July
1987) An impregnation material, selected from the group of fragrances, pest control agents and pharmaceuticals, dissolved in a volatile swelling agent such as carbon dioxide or nitrous oxide is contacted with a thermoplastic polymer at or near the supercritical conditions of temperature and pressure for the swelling agent. Pressure is then reduced and the swelling agent diffuses out of the impregnated thermoplastic polymer. Process for promoting the adhesion of epoxy bonded fiber reinforced plastics Atkins, K.E., Gandy, R.C. and Larck, W.A. (Union Carbide Corporation, Danbury, CN, USA) US Pat 4 678 711 (7 July
1987) Self-crosslinkable acrylic polymer latex primer is applied to the bonding surface of substrates, allowed to dry, epoxy adhesive is then applied to the primed bonding surfaces which are then contacted under conditions sufficient to cure the epoxy and achieve bonding. Method for stabilizing thick honeycomb core composite articles Jacaruso, G.J. (United Technologies Corporation, Hartford, CN, USA) US Pat 4 680
216 (14 July 1987) A layer of resin impregnated, woven, continuous graphite fibres is bonded to the open-cell surface of a honeycomb core. The resin is cured, stabilizing the honeycomb core, which is then cut to shape. One or more layers of reinforced matrix material are laid up onto the stabilized honeycomb core which is then heated under vacuum and pressure to cure the resin matrix.
334
Method for machining holes in composite materials Daniels, J.G., Ledbetter III, F.E., Clemons, J.M., Penn, B.G. and White, W.T. (Administrator of the National Aeronautics and Space Administration, Washington, DC, USA) US Pat 4 680 897 (21 July 1987) A method for machining a hole in a fibre-reinforced composite material in which a liquid slurry mixture of water and silicon carbide powder is applied to the work surface of the composite and acts as a cutting medium for the rotary boring tool. Method for production of fiber-reinforced metal composite material Koya, Y. and Katayama, T. (Mitsubishi Chemical Industries Limited, Tokyo, Japan)
US Pat 4 681 151 (21 July 1987) A bundle of fibres is impregnated with water, compressed and frozen to form a high density fibre shaped body which is then thawed and dried, whilst maintaining its compressed form. Molten metal is then poured into the fibre shaped body. Method for joining a fiber-reinforced plastic structure Kondo, K., Tsuchiya, Y., Niimi, T., Yamamoto, T. and Matsuba, K. (Toyota Jidosha Kabushiki Kaisha, Toyota, Japan) US Pat 4
681 647 (21 July 1987) A method is described for making a rotatable element including a metallic insert, a rim portion and spokes connecting the insert and rim portion. The formation of the spokes and rim involves winding a resin-impregnated strand of continuous long-staple fibres. Moulding of composite materials Buxton, F.A. and Barraclough, D.J. (RollsRoyce pie, London, England) US Pat 4 683
099 (28 July 1987) Numerous prepregs comprising resinimpregnated filaments are interposed between two polytetrafluoroethylene shaped bodies. Temperature is increased and the r e s u l t a n t t h e r m a l e x p a n s i o n of the polytetrafluoroethylene bodies compresses the prepregs, consolidating them and moulding them into the required shape. Apparatus for bulk production of carbon fibers Brotz, G.R. (Sheboygan, WI, USA) US Pat
4 684 336 (4 August 1987) An apparatus is described in which material is spun in a rotating basket spinner of a cylindrical chamber to produce fibre filaments which pass through an electron plasma adapted to change their state. Method fabricating a collapsible mandrel structure to be used in manufacturing hollow reinforced tanks Brooks, J.C. (Edo Corporation/Fiber Science Division, Salt Lake City, UT, USA) US
Pat 4 684 423 (4 August 1987) Strips of rubber are applied to a rigid mandrel supported on a rotatable axis. A coat of rubber solution is then applied over the strips, fibres are wound onto the coat and a second layer of rubber strips is applied. The rubber layers are then cured, cut into two parts, removed from the mandrel and rejoined to form the collapsible mandrel. A method of forming a hollow tank using the collapsible mandrel is also claimed.
Manufacture of glass fibre truck bodies Martin, R.J., McKee, W.C., Vader, S.J. and Seymour, F.C. (Unicell Limited, Toronto, Canada) US Pat 4 687 428 (18 August 1987) A system for manufacturing bodies for vans and trucks is described in detail. A moulding station and a glass fibre applicator adapted to apply a layer of compacted glass fibre and resin to the bottom side and end faces of one of the moulds to form a glass fibre shell are part of the system described. Process for producing a high integrity container Suzuki, O., Ishizaki, K. and Ozawa, S. (dec.) (Chichibu Cement Co., Ltd/Ozawa Concrete Industry Co., Ltd of Japan) US Pat
4 687 614 (18 August 1987) A process for fabricating a high integrity container having a three layered wall structure and incorporating an hydraulic concrete mix comprising cement, water, aggregate, a fibrous reinforcing material selected from steel fibres (<2 volume %), glass fibres, carbon fibres and polymer fibres, and a water reducing agent or an expansive admixture to prevent cracking. The burial of intermediate and low level radioactive wastes for at least 100 years in these containers is claimed. Method of making a chemically bonded coating on a fibrous or filamentous substrate Siemon, J.T. and Sadhir, R.K. (Westinghouse Electric Corp, Pittsburgh, PA, USA)
US Pat 4 687 681 (18 August 1987) A method of forming a coating on an organic polymeric fibrous substrate for use in making a laminate that will exhibit reduced microcracking, is given. Method for manufacturing a reactionsintered metal/ceramic composite body and metal/ceramic composite body Chevigne, M., Darracq, D. and Wiaux, J-P. ( E L T E C H Systems Corporation, Boca Raton, FL, USA) US Pat 4 689 077 (25
August 1987) A particulate precursor mixture is pressed to a self-sustaining body presintered by heating and then comminuted. Particles of a suitable grain size distribution are pressed into shapes of desired size and configuration and heated to a temperature at which reaction sintering is initiated. Method of fabricating multilayer printed circuit board structure Leibowitz, J.D. (TRW Inc., Redondo Beach, CA, USA) US Pat 4 689 110 (25
August 1987) A woven graphite cloth is impregnated with resin to form a solid graphite sheet which, together with a copper-clad sheet of polytetrafluoroethylene and woven glass, is laminated to form a composite printed circuit board. Details of this method of fabrication are expanded upon. Process for promoting the interlaminate adhesion of polymeric materials to metal surfaces Chan, K.K. and Malueg, V.J. (International Business Machines Corp, Armonk, NY, USA) US Pat 4 689 111 (25 August 1987) A method for improving the adhesion of polymeric materials to metal surfaces is claimed in which the metal surface is treated with metal oxide and exposed in a gaseous plasma containing a fluorohydrocarbon compound.
COMPOSITES. JULY 1988
098 (25 August 1987) A composition comprising a met of nonmetallic reinforcing fibres and a distribution of nonwoven metal whiskers or fibres of a ductile conductive metal or metal alloy carried on the mat is claimed. Mat structure Smoot, M.A., Batch, H.W. and Das, B. (PPG Industries, Inc., Pittsburgh, PA, USA)
US Pat 4 689 255 (25 August 1987) A glass fibre containing composite mat having many glass fibre strands affixed to a fluid permeable sheet, is described. Insulating polymer concrete Schorr, H.P., Fontana, J.J. and Steinberg, M. (The Brooklyn Union Gas Company, Brooklyn, NY, USA) US Pat 4 689 358 (25
August 1987) The title material comprises a lightweight aggregate selected from the group consisting of hollow aluminium silicate spheres, expanded perlite coated with polyester resin and mixtures of both, an epoxy resin binder and a hydrated particulate flame retarding agent. Enhanced water resistance and crush strength, and increased flame retardency are claimed.
PROCESSES Method for impregnating a thermoplastic polymer Sand, M.L. (Hercules Incorporated, Wilmington, DE, USA) US Pat 4 678 684 (7 July
1987) An impregnation material, selected from the group of fragrances, pest control agents and pharmaceuticals, dissolved in a volatile swelling agent such as carbon dioxide or nitrous oxide is contacted with a thermoplastic polymer at or near the supercritical conditions of temperature and pressure for the swelling agent. Pressure is then reduced and the swelling agent diffuses out of the impregnated thermoplastic polymer. Process for promoting the adhesion of epoxy bonded fiber reinforced plastics Atkins, K.E., Gandy, R.C. and Larck, W.A. (Union Carbide Corporation, Danbury, CN, USA) US Pat 4 678 711 (7 July
1987) Self-crosslinkable acrylic polymer latex primer is applied to the bonding surface of substrates, allowed to dry, epoxy adhesive is then applied to the primed bonding surfaces which are then contacted under conditions sufficient to cure the epoxy and achieve bonding. Method for stabilizing thick honeycomb core composite articles Jacaruso, G.J. (United Technologies Corporation, Hartford, CN, USA) US Pat 4 680
216 (14 July 1987) A layer of resin impregnated, woven, continuous graphite fibres is bonded to the open-cell surface of a honeycomb core. The resin is cured, stabilizing the honeycomb core, which is then cut to shape. One or more layers of reinforced matrix material are laid up onto the stabilized honeycomb core which is then heated under vacuum and pressure to cure the resin matrix.
334
Method for machining holes in composite materials Daniels, J.G., Ledbetter III, F.E., Clemons, J.M., Penn, B.G. and White, W.T. (Administrator of the National Aeronautics and Space Administration, Washington, DC, USA) US Pat 4 680 897 (21 July 1987) A method for machining a hole in a fibre-reinforced composite material in which a liquid slurry mixture of water and silicon carbide powder is applied to the work surface of the composite and acts as a cutting medium for the rotary boring tool. Method for production of fiber-reinforced metal composite material Koya, Y. and Katayama, T. (Mitsubishi Chemical Industries Limited, Tokyo, Japan)
US Pat 4 681 151 (21 July 1987) A bundle of fibres is impregnated with water, compressed and frozen to form a high density fibre shaped body which is then thawed and dried, whilst maintaining its compressed form. Molten metal is then poured into the fibre shaped body. Method for joining a fiber-reinforced plastic structure Kondo, K., Tsuchiya, Y., Niimi, T., Yamamoto, T. and Matsuba, K. (Toyota Jidosha Kabushiki Kaisha, Toyota, Japan) US Pat 4
681 647 (21 July 1987) A method is described for making a rotatable element including a metallic insert, a rim portion and spokes connecting the insert and rim portion. The formation of the spokes and rim involves winding a resin-impregnated strand of continuous long-staple fibres. Moulding of composite materials Buxton, F.A. and Barraclough, D.J. (RollsRoyce pie, London, England) US Pat 4 683
099 (28 July 1987) Numerous prepregs comprising resinimpregnated filaments are interposed between two polytetrafluoroethylene shaped bodies. Temperature is increased and the r e s u l t a n t t h e r m a l e x p a n s i o n of the polytetrafluoroethylene bodies compresses the prepregs, consolidating them and moulding them into the required shape. Apparatus for bulk production of carbon fibers Brotz, G.R. (Sheboygan, WI, USA) US Pat
4 684 336 (4 August 1987) An apparatus is described in which material is spun in a rotating basket spinner of a cylindrical chamber to produce fibre filaments which pass through an electron plasma adapted to change their state. Method fabricating a collapsible mandrel structure to be used in manufacturing hollow reinforced tanks Brooks, J.C. (Edo Corporation/Fiber Science Division, Salt Lake City, UT, USA) US
Pat 4 684 423 (4 August 1987) Strips of rubber are applied to a rigid mandrel supported on a rotatable axis. A coat of rubber solution is then applied over the strips, fibres are wound onto the coat and a second layer of rubber strips is applied. The rubber layers are then cured, cut into two parts, removed from the mandrel and rejoined to form the collapsible mandrel. A method of forming a hollow tank using the collapsible mandrel is also claimed.
Manufacture of glass fibre truck bodies Martin, R.J., McKee, W.C., Vader, S.J. and Seymour, F.C. (Unicell Limited, Toronto, Canada) US Pat 4 687 428 (18 August 1987) A system for manufacturing bodies for vans and trucks is described in detail. A moulding station and a glass fibre applicator adapted to apply a layer of compacted glass fibre and resin to the bottom side and end faces of one of the moulds to form a glass fibre shell are part of the system described. Process for producing a high integrity container Suzuki, O., Ishizaki, K. and Ozawa, S. (dec.) (Chichibu Cement Co., Ltd/Ozawa Concrete Industry Co., Ltd of Japan) US Pat
4 687 614 (18 August 1987) A process for fabricating a high integrity container having a three layered wall structure and incorporating an hydraulic concrete mix comprising cement, water, aggregate, a fibrous reinforcing material selected from steel fibres (<2 volume %), glass fibres, carbon fibres and polymer fibres, and a water reducing agent or an expansive admixture to prevent cracking. The burial of intermediate and low level radioactive wastes for at least 100 years in these containers is claimed. Method of making a chemically bonded coating on a fibrous or filamentous substrate Siemon, J.T. and Sadhir, R.K. (Westinghouse Electric Corp, Pittsburgh, PA, USA)
US Pat 4 687 681 (18 August 1987) A method of forming a coating on an organic polymeric fibrous substrate for use in making a laminate that will exhibit reduced microcracking, is given. Method for manufacturing a reactionsintered metal/ceramic composite body and metal/ceramic composite body Chevigne, M., Darracq, D. and Wiaux, J-P. ( E L T E C H Systems Corporation, Boca Raton, FL, USA) US Pat 4 689 077 (25
August 1987) A particulate precursor mixture is pressed to a self-sustaining body presintered by heating and then comminuted. Particles of a suitable grain size distribution are pressed into shapes of desired size and configuration and heated to a temperature at which reaction sintering is initiated. Method of fabricating multilayer printed circuit board structure Leibowitz, J.D. (TRW Inc., Redondo Beach, CA, USA) US Pat 4 689 110 (25
August 1987) A woven graphite cloth is impregnated with resin to form a solid graphite sheet which, together with a copper-clad sheet of polytetrafluoroethylene and woven glass, is laminated to form a composite printed circuit board. Details of this method of fabrication are expanded upon. Process for promoting the interlaminate adhesion of polymeric materials to metal surfaces Chan, K.K. and Malueg, V.J. (International Business Machines Corp, Armonk, NY, USA) US Pat 4 689 111 (25 August 1987) A method for improving the adhesion of polymeric materials to metal surfaces is claimed in which the metal surface is treated with metal oxide and exposed in a gaseous plasma containing a fluorohydrocarbon compound.
COMPOSITES. JULY 1988