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Fibrous composite material for fused aluminium
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Abstracts of British Patents are prepared by Dr F.R. Jones, Department of Materials Science and Engineering, University of Surrey, UK
UK PATENTS COMPONENTS
A fibre reinforced beam (Ramage, L.M., Lee, D.J. and Hook, D.M.A., all of UK) GB 2 144 683 A (13 March 1985) A GRP pultruded beam with a resin-rich surface layer and an integral fitting channel is used as a vehicle side ~uard. Nucleated plastics dielectrics (Standard Telephone a n d Cables plc, UK) GB2 144 750:4 (13 March 1985) 0.05-2 weight % of a nucleating agent such as a substantially non-polar wax or finely divided inorganic filler reduces the average spherulite diameter in polyethene, resulting in an increased breakdown field strength. Crosslinknble, crystallizable polyarylethers and composites therefrom (Union Carbide Corp, USA) GB 2 146 344"A (17 April 1985) An unsaturated end-group terminated polyaryl ether sulphone matrix for fibre composites is described. By incorporating an appropriate crystallization-promoting plasticizer, such as triphenyl phosphate or other reactive unsaturated c o m p o u n d s such as 4, 4-bis (3ethynylphenoxy) diphenyl sulphone, the solvent resistance and environmental stress crack resistance can be improved. Conventional prepre[g technology or interleaving of dried resin films are suggested composite fabrication processes, Reinforced element [AB Hydro Betong. Sweden) GB 2 146 634 A (24 April 1985) Helically wound steel wires of opposite direction form reinforcing elements for concrete. The inside of the wire form can also contain a plastic filler. Reducing the viscosity of filled liquid polymers BASF Wyandotte Corp, USA) GB 2 147 592:4 (15 May 1985) Organo-zirconium c o m p o u n d s reduce the viscosity of filled polyurethane prepolymer mixe~ Preparation of silicon carbide fibers (United States Department of Energy, USA) GB 2 147 891 A (22 May 1985) fl-SiC fibres are prepared from rayon fibres and a colloidal silica dispersion heat-treated to 1900°C. Metal-clad laminate construction (General Electric Co, USA) GB 2 148 182:4 (30 May 1985) A layer of silane coupling agent acts as an adhesion promotor between zinc oxide deposited into copper and a G R P substrate.
COMPOSITES. OCTOBER 1985
Thermosetting epoxy resin compositions for composites (Westinghouse Electric Corp, USA) GB 2 148 311 A (30 May 1985) A butadiene graft-copolymer, impact- modified, water-dispersible epoxy resin is used to make prepregs from the aqueous phase. The laminate is shown to have improved impact properties and high damping characteristics. The r'abbertoughened matrix also adheres well to aluminium. Molded fiber reinforced plastic leaf spring (AO Smith Corp, USA) GB 2 148 450 A (30 May 1985) A fibre composite leaf spring is moulded so that any flash occurs at the neutral ax'is` Manufacturing laminated articles (Armitage Shanks Ltd` UK) GB 2 148 786 A (5 June 1985) A shower tray of a bath is moulded by RRIM into the cpvity between thermoformed acrylic sheets. Helicopter blade longitudinal member and relative manufacturing method (Costruzioni Aeronautiche Giovanni Agusta SpA, Italy) GB 2 148 821 A (5 June 1985) A rubber bag for laying up a composite blade can be removed because the central core consists of heat-shrinkable, expanded polystyrene balls which "melf during curing. The rear section is also preformed and cured and used to consolidate the lay-up. Insulation board and process of making the same (Union Carbide Corp, USA) GB 2 148 879 A (5 June 1985) A binderless process for producing a glass fibre board of low density is described. The board is formed by heating the glass fibres to softening under a light compressive force to achieve point contacts, Curable bisimide resins (The Boots Co plc, UK) GB 2 148 911:4 (5 June 1985) The density of the named matrix resins is described. Metal-clad laminate construction (General Electric Co, USA) GB 2 149 346 A (12 June 1985) Circuit board laminates, in which the copper is bonded through ZnO or SnO and a silane coupling agent to GRP substrates are described (see also GB 2 148 182.4). Fibrous composite material for fused aluminium (Nichias Corp, Japan) GB 2 149 772 A (19 June. 1985) A fibrous/micaceous particulate composite consisting of alumino-silicate based ceramic fibres is resistant to molten aluminium.
MATERIALS
Composite materials (The Secretary of State for Defence, UK) GB 2 145 368:4 (27 March 1985) Hybrid laminates consisting of balanced wood veneer and FRM (carbon, glass or Kevlar) laminae are disclosed. The FRM is preferably on the outside. The laminates have a higher specific flexural strength than a simple carbon fibre cloth laminate. The failures arc noncatastrophic and occur in compression without delamination. Polymer densified fillers (General Electric Company, USA) GB2 147598 A (15 May 1985) Fumed silica and related fillers are densified into a free-fiowing powder by compounding with a silicone polymer. Fibre-reinforced thermoplastic laminate (Secretary of State for Defence, UK) GB 2 147 850 A (27 May 1985) A reinforced thermoplastic laminate for hot compression moulding consists of laminae of short fibre-reinforced matrix (thermoplastic layer) and cloth fibre-reinforced matrix (reinforcing layer). Fire resistant insulating structure (Pall Corp, USA) GB 2 147 851 A (22 May 1985) A fire-resistant thermally insulating composite from Nomex or other inorganic microfibres is made by a slurry technique and is described for use as a safety garment. Cement materials (British Ceramic Research Association ktd` UK) GB 2 148 270 A (30 May 1985) Aluminium is pressure-infiltrated into a porous body of sintered a-SiC or AI203 particles. Sheet material of fibre-reinforced cement (Pilkington Bros plc, UK) GB 2 148 871 A (5 June 1985) Fumed silican P F A - O P C cement containing zirconia glass fibres is described. Cellulose fibres may also be included. The material can be manufactured into an asbestos-cement replacement by conventional methods. The product has a better surface finish than conventional GRC and improved durability. Semiconductive glass fibers (General Electric Co, USA) GB 2 148 880 A (5 June 1985) A semiconductive material is formed by impregnating glass fibres or fabric with a pyrolysible organic source of carbon. A starchvegetable oil sizing which carbonizes is preferred.
341
oF t t il¢$
Abstracts of British Patents are prepared by Dr F.R. Jones, Department of Materials Science and Engineering, University of Surrey, UK
UK PATENTS COMPONENTS
A fibre reinforced beam (Ramage, L.M., Lee, D.J. and Hook, D.M.A., all of UK) GB 2 144 683 A (13 March 1985) A GRP pultruded beam with a resin-rich surface layer and an integral fitting channel is used as a vehicle side ~uard. Nucleated plastics dielectrics (Standard Telephone a n d Cables plc, UK) GB2 144 750:4 (13 March 1985) 0.05-2 weight % of a nucleating agent such as a substantially non-polar wax or finely divided inorganic filler reduces the average spherulite diameter in polyethene, resulting in an increased breakdown field strength. Crosslinknble, crystallizable polyarylethers and composites therefrom (Union Carbide Corp, USA) GB 2 146 344"A (17 April 1985) An unsaturated end-group terminated polyaryl ether sulphone matrix for fibre composites is described. By incorporating an appropriate crystallization-promoting plasticizer, such as triphenyl phosphate or other reactive unsaturated c o m p o u n d s such as 4, 4-bis (3ethynylphenoxy) diphenyl sulphone, the solvent resistance and environmental stress crack resistance can be improved. Conventional prepre[g technology or interleaving of dried resin films are suggested composite fabrication processes, Reinforced element [AB Hydro Betong. Sweden) GB 2 146 634 A (24 April 1985) Helically wound steel wires of opposite direction form reinforcing elements for concrete. The inside of the wire form can also contain a plastic filler. Reducing the viscosity of filled liquid polymers BASF Wyandotte Corp, USA) GB 2 147 592:4 (15 May 1985) Organo-zirconium c o m p o u n d s reduce the viscosity of filled polyurethane prepolymer mixe~ Preparation of silicon carbide fibers (United States Department of Energy, USA) GB 2 147 891 A (22 May 1985) fl-SiC fibres are prepared from rayon fibres and a colloidal silica dispersion heat-treated to 1900°C. Metal-clad laminate construction (General Electric Co, USA) GB 2 148 182:4 (30 May 1985) A layer of silane coupling agent acts as an adhesion promotor between zinc oxide deposited into copper and a G R P substrate.
COMPOSITES. OCTOBER 1985
Thermosetting epoxy resin compositions for composites (Westinghouse Electric Corp, USA) GB 2 148 311 A (30 May 1985) A butadiene graft-copolymer, impact- modified, water-dispersible epoxy resin is used to make prepregs from the aqueous phase. The laminate is shown to have improved impact properties and high damping characteristics. The r'abbertoughened matrix also adheres well to aluminium. Molded fiber reinforced plastic leaf spring (AO Smith Corp, USA) GB 2 148 450 A (30 May 1985) A fibre composite leaf spring is moulded so that any flash occurs at the neutral ax'is` Manufacturing laminated articles (Armitage Shanks Ltd` UK) GB 2 148 786 A (5 June 1985) A shower tray of a bath is moulded by RRIM into the cpvity between thermoformed acrylic sheets. Helicopter blade longitudinal member and relative manufacturing method (Costruzioni Aeronautiche Giovanni Agusta SpA, Italy) GB 2 148 821 A (5 June 1985) A rubber bag for laying up a composite blade can be removed because the central core consists of heat-shrinkable, expanded polystyrene balls which "melf during curing. The rear section is also preformed and cured and used to consolidate the lay-up. Insulation board and process of making the same (Union Carbide Corp, USA) GB 2 148 879 A (5 June 1985) A binderless process for producing a glass fibre board of low density is described. The board is formed by heating the glass fibres to softening under a light compressive force to achieve point contacts, Curable bisimide resins (The Boots Co plc, UK) GB 2 148 911:4 (5 June 1985) The density of the named matrix resins is described. Metal-clad laminate construction (General Electric Co, USA) GB 2 149 346 A (12 June 1985) Circuit board laminates, in which the copper is bonded through ZnO or SnO and a silane coupling agent to GRP substrates are described (see also GB 2 148 182.4). Fibrous composite material for fused aluminium (Nichias Corp, Japan) GB 2 149 772 A (19 June. 1985) A fibrous/micaceous particulate composite consisting of alumino-silicate based ceramic fibres is resistant to molten aluminium.
MATERIALS
Composite materials (The Secretary of State for Defence, UK) GB 2 145 368:4 (27 March 1985) Hybrid laminates consisting of balanced wood veneer and FRM (carbon, glass or Kevlar) laminae are disclosed. The FRM is preferably on the outside. The laminates have a higher specific flexural strength than a simple carbon fibre cloth laminate. The failures arc noncatastrophic and occur in compression without delamination. Polymer densified fillers (General Electric Company, USA) GB2 147598 A (15 May 1985) Fumed silica and related fillers are densified into a free-fiowing powder by compounding with a silicone polymer. Fibre-reinforced thermoplastic laminate (Secretary of State for Defence, UK) GB 2 147 850 A (27 May 1985) A reinforced thermoplastic laminate for hot compression moulding consists of laminae of short fibre-reinforced matrix (thermoplastic layer) and cloth fibre-reinforced matrix (reinforcing layer). Fire resistant insulating structure (Pall Corp, USA) GB 2 147 851 A (22 May 1985) A fire-resistant thermally insulating composite from Nomex or other inorganic microfibres is made by a slurry technique and is described for use as a safety garment. Cement materials (British Ceramic Research Association ktd` UK) GB 2 148 270 A (30 May 1985) Aluminium is pressure-infiltrated into a porous body of sintered a-SiC or AI203 particles. Sheet material of fibre-reinforced cement (Pilkington Bros plc, UK) GB 2 148 871 A (5 June 1985) Fumed silican P F A - O P C cement containing zirconia glass fibres is described. Cellulose fibres may also be included. The material can be manufactured into an asbestos-cement replacement by conventional methods. The product has a better surface finish than conventional GRC and improved durability. Semiconductive glass fibers (General Electric Co, USA) GB 2 148 880 A (5 June 1985) A semiconductive material is formed by impregnating glass fibres or fabric with a pyrolysible organic source of carbon. A starchvegetable oil sizing which carbonizes is preferred.
341