Prepreg for making a composite having high elongation and heat resistance and process for making such composite with a prepreg

Filament rein for cement impregnated with resin of thickenable composition based on an adduct of alkadiene polymers and acid anhydride Scnatore, G. (Phillips Petroleum Company, Bartlesville, OK. USA) US Pat 4 479 837 (30 October 1984) Continuous fibres are pulled through a bath containing a vinyl alkadiene, a dicarboxylic acid anhydride, a thickening agent (alkaline earth metal oxides or hydroxides) and an organic peroxide. The fibres may then be filament wound before the composition is cured, Thin layer thermoplastic polymer I~onded covalently at its surface to a mineral component Brownscombe. T.F. (Shell Oil Company, Houston, TX, USA) US Pat4 480 005 (30 October 1984) A particulate or filamentary materiak for use in reinforcing polymers, has a 0.5-50 nm thick layer of thermoplastic covalently bonded to it. Non-burring drill for composite materials (Jeremias` tLW., Royal Oak, MI, USA) US Pat 4 480 952 (6 November 1984) A drill for composite materials has a shank with a coaxial drill head which has a forward cutting tip and a rearward circular cutting edge. Core material for fiber reinforced plastic and process for its production Kawashima, S. and Takel H. (Asahi Fiber (;lass Company Limited. Tokyo, Japan) USPat 4 481 241 (6 November 1984) A perforated mat of glass fibre bundles has unsaturated polyester resin, which does not contain a cross-linking agent, in the voids of the mat. The bulk density of the material is 50-150 kg m -3. Metallized carbon fibres and composite materials containing these fibres Ebneth, H. et at (Bayer Aktiengesellschaft, Leverkusen, FRG) US Pat 4 481 249 (6 No vetober 1984) Carbon fibres are coated with nickel in a current-less process employing an organometallic compound as an activating agent in a liquid metallization bath. These fibres are used to reinforce epoxy resin to give a material with a Young's modulus of>300 GPa. Boron coated silicon carbide filaments Suplinskas, ILJ. and Hauze, A.W. (Avco Corporation, Wilmington, MA, USA) US Pat 4 481 257 (6 November 1984) A high strength, high modulus filament has a silicon carbide core and a boron-containing refractory outer layer, deposited on the substratc at 760-1400°C. Bond reinforced plastic structures Donermeyer, D.D., Martins, J.G. and Fabel, D.A. (Monsanto Company, St Louis, MO, USA) US Pat 4 482 604 (13 November 1984) This structure comprises reinforced plastic made from either SMC or BMC, coated with a primer and bonded together by a thermoplastic block copolymer. The primer is an epoxidized novalac and an amidopolyamine; the copolymer comprises polyester or polyamide and polyamide or polyether. Toughened thermosetting compositions for composites Sanjana, Z.N. and Marchetti, J.R, (Westinghouse Electric Corp. Pittsburgh, PA, USA)

COMPOSITES. OCTOBER 1985

US Pat 4 482 659 (13 November 1984) This B-stageable epoxy is toughened with a butadiene copolymer.

Prepreg for making a composite having high elongation and heat resistance and process for making such composite with a prepreg Minimisawa, T. and Andoh, M. (Toho Beslon Co Ltd, Tokyo, Japan) US Pat 4 482 660 (13 November 1984) The detailed composition of an epoxy resin for use in making composite prepregs is given. It contains a glycidylamine epoxy and a copolymer of epoxy resin and butadieneacrylonitrile. A diaminodiphenylsuphone is used as the curing agent. Bar support for use with reinforced concrete (Hernandez, E., West Covina` CA, USA) USPat 4 483 119 (20 November 1984) A support for a reinforcing rod used in reinforced concrete is described. Anchor construction for concrete walls or slabs Froening. H. and Basyounk M. (Hochtemperature- Reaktorbau GmbH, Cologne, FRG) US Pat 4 483 121 (20 November

1984) A grid of reinforcing rods cast into a concrete wall or slab has a clamping member mounted in the grid with the reinforcing rods in a groove produced by a pair of flanges on the clamping member.

High modulus polyethylene fiber bundles as reinforcement for brittle matrices Eickman, N.C., Fabisiak, W. and Dix, IL (Celanese Corporation, New York, NY, USA) US Pat 4 483 727 (20 November 1984) Discrete, coherent bundles of high modulus polyethylene fibres are compressed to deform the individual filaments and then chopped into appropriate lengths so that the fibre ends partially fuse during chopping. Method of manufacturing continuous fiber reinforced plastic rims Fujisaki. M. et al (Honda Giken Kogyo Kabushiki Kaisha, Tokyo and Sumitomo Electric Industries Ltd, Osaka, both of Japan) US Pat 4 483 729 (20 November 1984) An FRP wheel rim for automobiles and motorcycles is formed from two rim halves bonded together via a continuous ring The prepreg sheets used to form the rim halves are laid with their fibres angularly offset so that the continuous fibres in them are isotropic around the circumference of the rim. Antioxidants and reinforced polymers and oil-inwater emulsions of antioxidants Tamosaukas` A.E. (PPG Industries Inc, Pittsburgh, PA` USA) US Pat 4 483 948 (20 November 1984) Thermal ageing of reinforced polymers is reduced by treating the polymer with a hindered phenolic or diarylamine antioxidant High gloss polyethylene terephthalate reinforced resin composites Christiansen, J. and Lu, K - Z (Celanese Corporation, New York, NY, USA) US Pat4 483 955 (20 November 1984) High gloss is imparted to a reinforced polyethylene terephthalate by adding an alkali metal silicate, carbonate or bicarbonate and neopentylglycol dibenzoate.

Heat resistant sheet gasket Yamamoto, T., Ashizawa` M. and Shimoda, Y. (Nichias Corporation, Tokyo, Japan) US Pat 4 485 138 (27 November 1984) mixture of extremely short wollastonite fibres, needle crystals of CaSiO 3, natural or synthetic rubber, fibrillated polymer fibres, clay fillers and thermally conductive fine metal particles is laminated under pressure on both sides of a thin metal sheet and then vulcanized. Chemically modified high oil asphalt Harrington, E.R., Uffner, W.E. and Janicki, R.T, (Owens-Corning Fiberglas Corporation, Toledo, OH, USA) US Pats 4 485 142 and 4 485 145 (27 November 1984) A membrane comprising fibrous reinforcing material coated with an asphalt is described in US Pat 4 485 142. Glass fibres coated with the same asphalt are claimed in USPat4 485 145. In both cases the asphalt composition is a high-oil asphalt reacted with a vinyl aromatic monomer and either a conjugated diene homopolymer or a copolymer of conjugated dienc and an ethylenic monomer. Rifled fiber reinforced gun barrel Shankhla, V.S. and Langlois, R. (Minister of National Defence of Her Majesty's Canadian Government Ottawa, Canada) US Pat4 485 721 (4 December 1984) A barrel of a rifle is made I?om carbon fibrereinforced epoxy with the fibres arranged longitudinally in the riflings (which impose spin on the bullet) and circumferentially in the body of the barrel. Fiber material (Herr, A.K., Stutenee-Spbck, FRG) US Pat 4 486 234 (4 December 1984) Fibrous organic vegetable, animal or synthetic material for reintorcing organic binders has a tertiary phosphate attached to the fibres formed by the reaction of orthophosphoric acid with a metal hydrogen carbonate or carbonate,

MATERIALS Aluminum alloy reinforced with silica aluminin fiber Yamatsuta` K. and Nishio, K.-I. (Sumitomo Chemical Company Limited, Osaka, Japan) US Pat4 444 603 (24 April 1984) Inorganic fibres with alumina as the main component and silica as the secondary component are combined with a molten aluminium alloy containing Cu, Si, Zn, Mg or mixtures thereof. The resulting composite is retained at a temperature o f > 4 0 0 ° ( and lower than that of the solid phase line of the alloy for 1-30 h and is then cooled at a rate of 300°C rnin -I or more to 200°C. Reinforcing adhesive sheets Tominaga, T., Ariyoshi, T. and Asoshina` E. (Nitto Electric Industrial Co Ltd, Osaka, Japan) US Pat4 444 818 (24 April 1984) A reinforcing adhesive sheet comprising a thermoset resin sheet with a reinforcing material embedded therein has a flattened tubular material on one side of the prepreg. The flattened tubular material almost recovers its tubular form on heating and is narrower in width than the prcpreg Copper-clad polyester-glass fiber laminates using zinc-coated copper Barrelk D. etal (Glasteel Tennessee lnc, Duarte,

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