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Extrusion composition based on glass fibre reinforced vinyl resins
Improvements in or relating to resinous impregnating compositions (Westinghouse Electric Corporation, USA) Br Pat 1 494 105 (7 December 1977) BTDA (Benzophenone tetracarboxylic dianhydride) imparts superior high temperature resistance to bisphenol A epoxide resins and composites, but its insolubility makes its use difficult. A means of stabilising a resin dispersion containing BTDA with similar nonaromatic dianhydride is claimed.
Improvements relating to refractory bricks (Patterson, D.A.J. and Williams, T.A.) Br Pat 1 494 194 (7December 1977) Refractory inorganic fibres improve properties of a refractory brick mix.
Polyimide copolymers (Hughes Aircraft Co, USA) Br Pat 1 495 988 (21 December 1977) Void free composites of high temperature resistance, up to about 300°C can be prepared from resins based on ethynyl-substituted polyimide oligomers diluted with a 'reactive' thinner, diethynylbenzene. Voids are prevented by the low viscosity and the lack of condensation products normally associated with the curing of polyimides.
Polyester resin compositions (Bayer Aktiengesellshcaft, Germany) Br Pat I 495 804 (21 December 1977) Unsaturated polyester resins and composites having improved aqueous solution resistance are prepared conventionally with 2-alkyl, 1, 3-dihydroxy propanes.
Composition compounded of activated mineral filler (Asahi Kasei Kogyo Kabushiki Kaisa and Shiraishi Central Laboratories Co Ltd, Japan) Br Pat 1 496 088 (21 December 1977) A feldspar activated with acrylic acid mixed with a thermoplastic, such as polyethylene, partially crosslinked with free radicals produces a material with improved impact and flexural strengths compared to non-activated filler.
COMPOSITES. JULY 1978
Sheet moulding compounds (Owens-Corning Fiberglas Corp, USA) Br Pat I 496 600 (30 December 1977) Conventional polyester resin containing a dispersed thermoplastic phase typically a copolymer of styrene acrylonitrile and acrylic acid - CaCO3 Idler and Ca (OH)2 thickener makes a smc with superior mouldability.
Composition for corrosion protection (Hooker Chemicals and Plastics Corp, USA) Br Pat i 496 461 (30 December 1977) Improved corrosion resistance for metallic surfaces is obtained by coating with a polyseric material containing 20-95% of a silicide such as (MgFeSi).
Improved sheet or bulk moulding compounds (Owens-Corning Fiberglas Corp, USA) Br Pat 1 498 248 (18January 1978) Dmc and smc have improved surfaces when a thermoplastic composition is included. The latter is based on sbr, a low polymer of butadiene with -OH end-groups and acrylic acid.
Moulding and coating compositions (Chemische Werke H//ls, Aktiengesellschart, Germany)BrPat 1 498 268 (18 January 19 78) The pot-life of a conventional amine preaccelerated polyester resin is improved by incorporating a ketoenol tantomeric compound such as triacetylmethane and acetylacetone at a level of about 0.1%.
Improved process for producing carbon fibres from mesophase pitch (Union Carbide Corp, USA) Br Pat 1 496 678 (30 December 1977)
Extrusion composition based on glass fibre reinforced vinyl resins
The mesophase can be produced in shorter times than previously. The invention relates to removing volatile components, under reduced pressure with a flow of inert gas, which normally inhibits the formation of a 'liquid' crystal or mesophase in petroleum pitch.
(Produits Chimiques Ugine Kuhlmann, France) Br Pat 1 498 450 (25 January 1978) PVC or similar compositions with glass fibres and particulates which good surface properties are described. Lubrication with oxidised polyethylene wax is claimed.
Reinforced thermoplastic styrene polymer compositions (BASF Aktiengesellschaft, Germany) Br Pat 1 496 960 (5January 1978) Carbon and glass fibre reinforced san has improved mouldability, in particular better surfaces to the mouldings when styrene oligomers are incorporated as a lubricant.
Alkali-resistant glass composition (Konebo Ltd, Japan) Br Pat 1 49 7 223 (5 January 19 78) The glass composition is suitable for producing fibres for reinforcing cement based products. A zirconia glass (11.5-14 tool %) is described.
Process for producing carbon fibres (Japan Exlan Co Ltd, Japan) Br Pat 1 149 947 (12 January 1978) Thermally stabilised pan copolymer fibres are treated with an aqueous solution of 5% Na2S204 of pH = 8. The carbonisation of the washed and dried fibres is carried out in a nitrogen atmosphere, resulting in carbon fibres with improved properties.
Polymer materials (NRDC (to Capaccio and Ward)) Br Pat 1 498 628 (25 January 1978) High modulus thermoplastic materials such as polypropylene and polyethylene are produced by the protected thermal and orientation process. In particular high modulus fibres are produced after drawing to a draw ratio of 30, with values of E up to 6 × 10 l ° N / m 2.
Production of carbon fibre (Morganite Modmor Ltd) Br Pat 1 498 721 (25 January 1978) Handling of carbon fibres in production and use can be improved by imparting a twist to the tow between the oxidation and carbonisation stages.
Extrusion composition based on glass fibre reinforced vinyl resin (Products Chimiques Ugine Kuhlmann, France) Br Pat 1 498 755 (25 January 1978) (Improvement to Br Pat 1498
450) The composition is a combination of glass fibres, glass balls and calcium carbonate particles, which gives good thermoplastic mouldings.
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Improvements relating to refractory bricks (Patterson, D.A.J. and Williams, T.A.) Br Pat 1 494 194 (7December 1977) Refractory inorganic fibres improve properties of a refractory brick mix.
Polyimide copolymers (Hughes Aircraft Co, USA) Br Pat 1 495 988 (21 December 1977) Void free composites of high temperature resistance, up to about 300°C can be prepared from resins based on ethynyl-substituted polyimide oligomers diluted with a 'reactive' thinner, diethynylbenzene. Voids are prevented by the low viscosity and the lack of condensation products normally associated with the curing of polyimides.
Polyester resin compositions (Bayer Aktiengesellshcaft, Germany) Br Pat I 495 804 (21 December 1977) Unsaturated polyester resins and composites having improved aqueous solution resistance are prepared conventionally with 2-alkyl, 1, 3-dihydroxy propanes.
Composition compounded of activated mineral filler (Asahi Kasei Kogyo Kabushiki Kaisa and Shiraishi Central Laboratories Co Ltd, Japan) Br Pat 1 496 088 (21 December 1977) A feldspar activated with acrylic acid mixed with a thermoplastic, such as polyethylene, partially crosslinked with free radicals produces a material with improved impact and flexural strengths compared to non-activated filler.
COMPOSITES. JULY 1978
Sheet moulding compounds (Owens-Corning Fiberglas Corp, USA) Br Pat I 496 600 (30 December 1977) Conventional polyester resin containing a dispersed thermoplastic phase typically a copolymer of styrene acrylonitrile and acrylic acid - CaCO3 Idler and Ca (OH)2 thickener makes a smc with superior mouldability.
Composition for corrosion protection (Hooker Chemicals and Plastics Corp, USA) Br Pat i 496 461 (30 December 1977) Improved corrosion resistance for metallic surfaces is obtained by coating with a polyseric material containing 20-95% of a silicide such as (MgFeSi).
Improved sheet or bulk moulding compounds (Owens-Corning Fiberglas Corp, USA) Br Pat 1 498 248 (18January 1978) Dmc and smc have improved surfaces when a thermoplastic composition is included. The latter is based on sbr, a low polymer of butadiene with -OH end-groups and acrylic acid.
Moulding and coating compositions (Chemische Werke H//ls, Aktiengesellschart, Germany)BrPat 1 498 268 (18 January 19 78) The pot-life of a conventional amine preaccelerated polyester resin is improved by incorporating a ketoenol tantomeric compound such as triacetylmethane and acetylacetone at a level of about 0.1%.
Improved process for producing carbon fibres from mesophase pitch (Union Carbide Corp, USA) Br Pat 1 496 678 (30 December 1977)
Extrusion composition based on glass fibre reinforced vinyl resins
The mesophase can be produced in shorter times than previously. The invention relates to removing volatile components, under reduced pressure with a flow of inert gas, which normally inhibits the formation of a 'liquid' crystal or mesophase in petroleum pitch.
(Produits Chimiques Ugine Kuhlmann, France) Br Pat 1 498 450 (25 January 1978) PVC or similar compositions with glass fibres and particulates which good surface properties are described. Lubrication with oxidised polyethylene wax is claimed.
Reinforced thermoplastic styrene polymer compositions (BASF Aktiengesellschaft, Germany) Br Pat 1 496 960 (5January 1978) Carbon and glass fibre reinforced san has improved mouldability, in particular better surfaces to the mouldings when styrene oligomers are incorporated as a lubricant.
Alkali-resistant glass composition (Konebo Ltd, Japan) Br Pat 1 49 7 223 (5 January 19 78) The glass composition is suitable for producing fibres for reinforcing cement based products. A zirconia glass (11.5-14 tool %) is described.
Process for producing carbon fibres (Japan Exlan Co Ltd, Japan) Br Pat 1 149 947 (12 January 1978) Thermally stabilised pan copolymer fibres are treated with an aqueous solution of 5% Na2S204 of pH = 8. The carbonisation of the washed and dried fibres is carried out in a nitrogen atmosphere, resulting in carbon fibres with improved properties.
Polymer materials (NRDC (to Capaccio and Ward)) Br Pat 1 498 628 (25 January 1978) High modulus thermoplastic materials such as polypropylene and polyethylene are produced by the protected thermal and orientation process. In particular high modulus fibres are produced after drawing to a draw ratio of 30, with values of E up to 6 × 10 l ° N / m 2.
Production of carbon fibre (Morganite Modmor Ltd) Br Pat 1 498 721 (25 January 1978) Handling of carbon fibres in production and use can be improved by imparting a twist to the tow between the oxidation and carbonisation stages.
Extrusion composition based on glass fibre reinforced vinyl resin (Products Chimiques Ugine Kuhlmann, France) Br Pat 1 498 755 (25 January 1978) (Improvement to Br Pat 1498
450) The composition is a combination of glass fibres, glass balls and calcium carbonate particles, which gives good thermoplastic mouldings.
211