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Glass fiber reinforced polyester molding compositions containing metal salts
MATERIALS Stampable polymeric composite containing an EMI/RFI shielding layer Kritchevsky, G.R., Gregor, J.A., Gruendig, M.W., Sellers, G.J. and Verona Liss, B. (Allied Corporation, Morris Township, Morris County, NJ, USA) US Pat 4 678 699 (7 July 1987) A stamped composite comprising at least one thermoplastic layer and one shielding layer of thermoplastic woven fibre containing metal fibre having an elongation to break of > 8 % and an EMI/RFI shielding effectiveness of 30dB; the composite having been elongated > 8 % without holes formed by tearing of the shielding layer during stamping. Friction material and method of making such material Nakagawa, M. and Nitto, F. (Sumitomo Electric Industries, Ltd., Osaka, Japan) US Pat 4 678 818 (7 July 1987) A friction material comprising 10-35 volume % of a matrix forming binder material in which is embedded a combination of graphite powder and 0.5-15 volume % of a metal or metal alloy softer than steel and 5-35 volume % of a friction causing component selected from steel fibres, steel powder, asbestos fibres, glass fibres, rock wool, glass wool, carbon fibres, acrylic fibres and aramid fibres. The remainder of the material being made of graphite and a filler. Amorphous hydrated metal oxide primer for composite fibers Pike, R.A. (United Technologies Corporation, Hartford, CN, USA) US Pat 4 678 820 (7 July 1987) A fibre reinforced polymeric matrix composite material utilizing as fibre reinforcement fibres having a layer of amorphous hydrated metal oxide possessing wet strength retention is described. Composites Logullo, St, F.M., Wu, Y-T. and Zahr, G.E. (E.I. Du Pont de Nemours and Company, Wilmington, DE, USA) US Pat 4 678 821 (7 July 1987) A rigid composite comprising an epoxy resin matrix reinforced with continuous p-aramid filaments coated with 0.2-2 weight % solid adhesion modifier, is described. Embedded in the matrix, the filaments exhibit a short beam shear strength of 2.5-5.5 Kpsi (tested in accordance with ASTM D234476). Multiphase epoxy thermosets having rubber within disperse phase Bard, J.K. (Hercules Incorporated, Wilmington, DE, USA) US Pat 4 680 076 (14July 1987) The composition of the title product is described in detail. Dielectric materials Johnson, D.D. (W.L. Gore & Associates, Inc., Newark, DE, USA) US Pat 4 680 220 (14 July 1987) A dielectric material is described comprising a fabric, impregnated with a thermosetting resin semi-cured to the B-stage state, having fibres of which some are treated fluorocarbon fibres wettable by an uncured thermosetting resin. The dielectric constant of the material is <3.5.
COMPOSITES. JULY 1988
Reinforced plastic O'Conner, J.E. (Phillips Petroleum Company, Bartlesville, OK, USA) US Pat 4 680 224 (14 July 1987) A reinforced plastic comprising a roving of reinforcing material having unidirectionally aligned fibres in a poly(arylene sulphide) matrix, is claimed. Poly(arylene sulfide) composition with improved insulation resistance and cracking resistance Leland, J.E., Dix, J.S. and Wright, R.F. (Phillips Petroleum Company, Bartlesville, OK, USA) US Pat 4 680 326 (14 July 1987) The title composition, comprising 30-80 weight % poly(arylene sulphide), a reinforcing material, 0.5-10 weight % low density polyethylene and at least one organosilane, provides an electrical insulation resistance of >1.0 x 1109 ohms and good crack resistance. Tubular lining material for pipe lines Hyodo, M. and Yagi, I. (Ashimori Industry Co., Ltd, Japan) US Pat 4 681 783 (21 July 1987) A tubular lining material comprising an air-impervious outer tubular jacket coated with an air-impervious outer layer of a synthetic resin with a reinforcing inner tubular textile jacket of larger diameter with a folded over portion, is claimed. The material, used for reinforcing pipelines, is inserted into a pipeline advancing into it by turning inside out under fluid pressure thus being applied to the inner surface of the pipe line with a binder between the two surfaces. Fibrous mat facer with improved strikethrough resistance Gill, F.A. and Tocci, M.P. (Manville Service Corporation, Denver, CO, USA) US Pat 4 681 798 (21 July 1987) A blend of dispersed, randomly oriented fibres comprising 2 weight % microfibres intermixed with base fibres of diameter 8-25p.m is held together by a binder comprising a water miscible combination of a heat settable binder resin and a wet proofing polymer resin to form a porous, non-woven fabric mat for use as a facer, substrate or carrier for receiving a curable substance while in the fluid state.
fibre layers are then restacked, shaped and pressure and temperature increased to fully consolidate them and to allow final curing of the resin. Glass fiber reinforced polyester molding compositions containing metal powders Hepp, L.R. (General Electric Company, Pittsfield, MA, USA) US Pat 4 684 686 (4 August 1987) The title composition comprises a thermoplastic poly(1,4-butylene terephthalate) resin, a glass fibre reinforcement and a 0.1-1.0 parts by weight of a particulate metal (for each 70 parts by weight of resin) to improve the flexural properties and melt viscosity of the thermoplastic resin. Two moulding compositions are also claimed in which one additionally comprises a flame retarding amount of halogenated aromatic flame retardant and the other additionally comprises an effective amount of antimony compound synergist. Chopped carbon fibers and methods for producing the same Schulz, D.A. and Nelson, L.C. (Amoco Corporation, Chicago, IL, USA) US Pat 4 686 096 (11 August 1987) Pitch is spun into numerous continuous fibres which are combined to form a pitch yarn, treated with an aqeuous composition of nitric acid and a water-soluble surfactant, chopped into short lengths suitable for injection moulding, collected into a bulk form and then subjected to a heat treatment to produce the chopped carbon yarn. Optimum formulation regions of reinforced thermoset composites Cordova, D.S., Rowan, H.H. and Lin, L.C. (Allied Corporation, Morris Township, Morris County, NJ, USA) US Pat 4 687 796 (18 August 1987) The composition is given as: 15-23 weight % resin matrix; 5-25 equivalent weight % fibre reinforcement comprising 20-80 volume % glass fibre and 80-20 volume % high tenacity reinforcing polyethylene terephthalate fibre; and 80-52 weight % particulate filler. Enhanced impact strength at high particulate filler loadings is claimed.
Reinforced composites Chang, I.Y. (E.I. Du Pont de Nemours and Company, Wilmington, DE, USA) US Pat 4 681 911 (21 July 1987) The detailed composition is given of a composite comprising a matrix formed of a copolyamide reinforced with 30-70 volume % of continuous filaments selected from the group of glass, carbon and p-aramid filaments.
Glass fiber reinforced polyester molding compositions containing metal salts Hepp, L.R. (General Electric Company, Pittsfield, MA, USA) US Pat 4 687 802 (18 August 1987) This thermoplastic moulding composition comprises poly(1,4-butylene terephthalate) resin, an halogenated aromatic flame retardant, an amount of antimony compound synergist and at least one effective metal salt 0.005-1 part by weight for each 50 parts by weight of the two former constituents, sufficient to reduce arc track rate.
Composite material manufacture by shaping individual sheets followed by consolidating the sheets Sutcliffe, D.T. and Barraclough, D.J. (RollsRoyce pie, London, England) US Pat 4 683 018 (28 July 1987) Numerous alternate layers of uncured epoxy resin impregnated fibre and thin elastic release film are stacked, raised to a temperature lower than required for resin curing and pressure applied. The shaped stacks are then cooled, pressure released and the layers separated, removing the thin elastic release film. The partially cured resin-impregnated
Composite material for construction purposes based on pozzuolanas and glass fibers and processes for manufacturing same Ambroise, J., Murat, M. and Pera, J. (Institut National des Sciences Appliquees de Lyon, France) US Pat 4 689 084 (25 August 1987) A composite glass fibre reinforced construction material is claimed, comprising a cement compound which generates lime, < 10 weight % non-metallic inorganic non-alkali resistant glass fibres, and synthetic pozzuolanas obtained by calcination from kaolinic compounds.
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COMPOSITES. JULY 1988
Reinforced plastic O'Conner, J.E. (Phillips Petroleum Company, Bartlesville, OK, USA) US Pat 4 680 224 (14 July 1987) A reinforced plastic comprising a roving of reinforcing material having unidirectionally aligned fibres in a poly(arylene sulphide) matrix, is claimed. Poly(arylene sulfide) composition with improved insulation resistance and cracking resistance Leland, J.E., Dix, J.S. and Wright, R.F. (Phillips Petroleum Company, Bartlesville, OK, USA) US Pat 4 680 326 (14 July 1987) The title composition, comprising 30-80 weight % poly(arylene sulphide), a reinforcing material, 0.5-10 weight % low density polyethylene and at least one organosilane, provides an electrical insulation resistance of >1.0 x 1109 ohms and good crack resistance. Tubular lining material for pipe lines Hyodo, M. and Yagi, I. (Ashimori Industry Co., Ltd, Japan) US Pat 4 681 783 (21 July 1987) A tubular lining material comprising an air-impervious outer tubular jacket coated with an air-impervious outer layer of a synthetic resin with a reinforcing inner tubular textile jacket of larger diameter with a folded over portion, is claimed. The material, used for reinforcing pipelines, is inserted into a pipeline advancing into it by turning inside out under fluid pressure thus being applied to the inner surface of the pipe line with a binder between the two surfaces. Fibrous mat facer with improved strikethrough resistance Gill, F.A. and Tocci, M.P. (Manville Service Corporation, Denver, CO, USA) US Pat 4 681 798 (21 July 1987) A blend of dispersed, randomly oriented fibres comprising 2 weight % microfibres intermixed with base fibres of diameter 8-25p.m is held together by a binder comprising a water miscible combination of a heat settable binder resin and a wet proofing polymer resin to form a porous, non-woven fabric mat for use as a facer, substrate or carrier for receiving a curable substance while in the fluid state.
fibre layers are then restacked, shaped and pressure and temperature increased to fully consolidate them and to allow final curing of the resin. Glass fiber reinforced polyester molding compositions containing metal powders Hepp, L.R. (General Electric Company, Pittsfield, MA, USA) US Pat 4 684 686 (4 August 1987) The title composition comprises a thermoplastic poly(1,4-butylene terephthalate) resin, a glass fibre reinforcement and a 0.1-1.0 parts by weight of a particulate metal (for each 70 parts by weight of resin) to improve the flexural properties and melt viscosity of the thermoplastic resin. Two moulding compositions are also claimed in which one additionally comprises a flame retarding amount of halogenated aromatic flame retardant and the other additionally comprises an effective amount of antimony compound synergist. Chopped carbon fibers and methods for producing the same Schulz, D.A. and Nelson, L.C. (Amoco Corporation, Chicago, IL, USA) US Pat 4 686 096 (11 August 1987) Pitch is spun into numerous continuous fibres which are combined to form a pitch yarn, treated with an aqeuous composition of nitric acid and a water-soluble surfactant, chopped into short lengths suitable for injection moulding, collected into a bulk form and then subjected to a heat treatment to produce the chopped carbon yarn. Optimum formulation regions of reinforced thermoset composites Cordova, D.S., Rowan, H.H. and Lin, L.C. (Allied Corporation, Morris Township, Morris County, NJ, USA) US Pat 4 687 796 (18 August 1987) The composition is given as: 15-23 weight % resin matrix; 5-25 equivalent weight % fibre reinforcement comprising 20-80 volume % glass fibre and 80-20 volume % high tenacity reinforcing polyethylene terephthalate fibre; and 80-52 weight % particulate filler. Enhanced impact strength at high particulate filler loadings is claimed.
Reinforced composites Chang, I.Y. (E.I. Du Pont de Nemours and Company, Wilmington, DE, USA) US Pat 4 681 911 (21 July 1987) The detailed composition is given of a composite comprising a matrix formed of a copolyamide reinforced with 30-70 volume % of continuous filaments selected from the group of glass, carbon and p-aramid filaments.
Glass fiber reinforced polyester molding compositions containing metal salts Hepp, L.R. (General Electric Company, Pittsfield, MA, USA) US Pat 4 687 802 (18 August 1987) This thermoplastic moulding composition comprises poly(1,4-butylene terephthalate) resin, an halogenated aromatic flame retardant, an amount of antimony compound synergist and at least one effective metal salt 0.005-1 part by weight for each 50 parts by weight of the two former constituents, sufficient to reduce arc track rate.
Composite material manufacture by shaping individual sheets followed by consolidating the sheets Sutcliffe, D.T. and Barraclough, D.J. (RollsRoyce pie, London, England) US Pat 4 683 018 (28 July 1987) Numerous alternate layers of uncured epoxy resin impregnated fibre and thin elastic release film are stacked, raised to a temperature lower than required for resin curing and pressure applied. The shaped stacks are then cooled, pressure released and the layers separated, removing the thin elastic release film. The partially cured resin-impregnated
Composite material for construction purposes based on pozzuolanas and glass fibers and processes for manufacturing same Ambroise, J., Murat, M. and Pera, J. (Institut National des Sciences Appliquees de Lyon, France) US Pat 4 689 084 (25 August 1987) A composite glass fibre reinforced construction material is claimed, comprising a cement compound which generates lime, < 10 weight % non-metallic inorganic non-alkali resistant glass fibres, and synthetic pozzuolanas obtained by calcination from kaolinic compounds.
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