- Email: [email protected]
Building a laminate of fibreglass-reinforced polyester resin on a spirally rotating mandrel
Abstracts of patents UK patents are prepared by V. Edwards, QMC Industrial Research Ltd, London UK PA TEN TS
Anti-static electrically-insulating resinous compositions (BTR Industries Limited) Br Pat 1 437 314 (26 May 1976) Materials, which when cured have resistances greater than 5 x 104~2 but less than 108f2 to give anti-static properties, consisting of a thermosetting resin, such as a polyester, containing 0.I to 0.5% carbon fibres. Improvements in or relating to alloy composite materials (Siemens Aktiengesellschaft) Br Pat 1 438 309 (3June 1976) A composite material based on silver and useful for electrical contact pieces is made by internally oxidising a powdered alloy of silver with one or more metals such as cadmium, zinc, tin, iron, nickel, copper, and lead. Method for preparing composite materials reinforced by graphite whiskers (Kureha Kagaku Kogyo Kabushiki Kaisha) Br Pat 1 438 509 (9 June 1976) Composites with reinforcement orientated in a predetermined direction are made by mixing graphite whiskers with a liquid resin or metal matrix and allowing the material to solidify in a magnetic field strong enough to orientate the whiskers. Cellular composites (Imperial Chemical Industries Limited) Br Pat 1 438 633 (9 June 1976) A strong, light, flexible composite is made by sandwiching continuous filaments between two layers of cellular sheeting, such as polyurethane, and compressing, while heating, to less than 25% of the original thickness.
Hose construction (Imperial-Eastman Corporation) Br Pat I 438 666 (9 June 1976) A tube of aromatic polyester thermoplastic resin is softened on the outside with a solvent, such as chloroform, and a reinforcement layer is applied and bonded to the surface. The solvent is then removed and an outer resin layer may be applied. (See also BrPat 1 439 286 below.)
COMPOSITES. APRIL 1977
Improvement in or relating to metallic composite materials (Siemens Aktiengesellschaft) Br Pat 1 438 698 (9 June 1976) Materials resistant to pitting and burning and useful for heavy duty vacuum switch contacts made of a sintered matrix of molybdenum or tungsten impregnated with a tellurium containing alloy of an element which forms a telluride. Reinforced formaldehyde-based moulding materials (Union Carbide Corporation) Br Pat I 438 783 (9 June 1976) Tough, thermosetting materials which can be injection or transfer moulded consist of formaldehyde based resins containing 5 to 50% by weight of poly (vinylalcohol) fibres having a weight average fibre length of from 0.25-3.2 ram. Improved plastics bearing (Samuel Merle Shobert) Br Pat 1 439 030 (9June 1976) A bearing consisting of ptfe fibres embedded in a resin matrix is made more efficient by increasing the ptfe content in the surface. The fibres are formed into cords with an irregular outer surface and each cord is woven into a fabric which further helps to anchor the fibres against displacement.
The reinforcing action of silica and silicate fillers is increased by additions of sulphur-containing organosilicon compounds of the general formula R3 Si-AIk-Sn-AIk-SiR3.
Hoses (Imperial Eastman Corporation) Br Pat 1 439 286 (16June 1976) A hose is made, avoiding the use of adhesives, with a polyurethane resin tube as a core which is softened on the outside using a suitable solvent. A reinforcing layer is applied under tension and an outer sheath of resin may also be used. (See also BrPat 1 438 666 above.)
Pelletized fibres (National Research Development Corporation) Br Pat I 439 327 {16 June 1976) Fibre-containing pellets suitable for injection moulding are made by extruding the resin into a cross-head die into which is also fed a continuous tow of carbon fibre so as to enclose the fibre in a continuous sheath of resin. The sheathed fibre is cut into pellets preferably 4 to 6 mm long.
Improvements in or relating to manufacture of a composite comprising a metal alloy and a carbonaceous material Opaque composite film (United Kingdom Atomic Energy (FMC Corporation) Br Pat I 439 242 Authority) Br Pat I 439 329 (16 June 1976) (16 June 1976) An economic, heat-sealable, packaging Carbon fibres are impregnated with a film that prevents the passage of blue molten alloy of a metal, which will not light which accelerates the deteriorawet or react with the fibres, containing tion of oil-containing food products, a small amount of a carbide-forming consisting of a layer of regenerated constituent. On solidification the cellulose containing titanium dioxide composite is heated below the melting coated on each side with a thermoplastic point allowing the carbide-forming film-forming resin at least one of these constituent to diffuse to the fibres coating contining an aluminium pigand form a bonding carbide layer. ment dispersion. Rubber mixtures containing reinforcing additives (Deutsche Gold- und SilberScheideanstalt) Br Pat I 439 247 (16 June 1976)
Building a laminate of fibreglassreinforced polyester resin on a spirally rotating mandrel (Filon-Azote) Br Pat 1 439 562 (16 June 1976J
119
A method for making large pipes and tanks using chopped glass roving involves pouring resin from a horizontal surface onto the top of a rotating mandrel, depositing chopped fibres over the resin and pressing the glass into the resin by the pressure of parallel strands of reinforcement wound over it.
Preparation of moulding compositions incorporated into aromatic polycar(B.P. Chemicals Intemational Limited) bonate without substantial molecular Br Pat 1 440 345 (23June 1976) weight reduction or loss of mechanical Stable sheet moulding material, which properties by incorporating 0.1 to rapidly becomes tack-free, is made from 10 parts of a vinyl polymer containing a polyester resin, a polymerisation an alkoxysilane group and an epoxy catalyst and a gelling agent, such as group, such as the copolymer of glycidyl sodium stearate, which is soluble in methacrylate, vinyl triethoxysilane and the hot resin but forms a gel when cold. methyl methacrylate. The mix is heated below the polymerisa(ion temperature, the reinforcement is impregnated and then cooled below Improvements in or relating to asbestosImprovements in or relating to compo30°C to form the gel. reinforced cementitious materials site sheet material comprising a layer (TAC Construction Materials Limited) of polyurethane united with a layer Br Pat I 441 616 (7July 1976) of fibrous sheet material and An improved material made in conprocess for the manufacture thereof Method for producing a substantially ventional manner consists of an (U.S.M. Corporation) Br Pat voidless filament-reinforced resin asbestos-reinforced, hydraulically set 1 439 819 (16June 1976) matrix cement containing, as additional An emulsion of a non-solvent, such as (United Aircraft Corporation) reinforcement, nylon fibre with a length a paraffmic hydrocarbon, in a conBr Pat I 440 610 (23June 1976) from 6 to 32 mm and a diameter of tinuous phase of a reactive polyurethane Primarily intended for high modulus 20 to 300/am. composition, is spread in a layer and fibre used with resin solutions, the heated at a temperature below the method involves loading the mould boiling point of the disperse solvent. with reinforced, uncured, resinImprovements in or relating to the When the polyurethane has partially solvent composition, part of the production of fibre-reinforced gelled a sheet of fibrous material is solvent having been removed leaving synthetic resin articles placed in contact where it adheres. voids. The remainder of the mould is (Hawker Siddiey Aviation Limited) Further heating completes the cure of filled with powdered matrix resin. Br Pat I 441 919 (7July 1976) the resin and removes the non-solvent, Compression moulding forces the resin Voids, due to outgassing during cure, leaving a microporous structure. to f'dl the voids. are prevented by totally enclosing epoxide resin-impregnated reinforcement in a deformable membrane Improvements in roller bodies within which is maintained a pressure Improvements in moulding (Carl Freudenberg) Br Pat 1 440 788 higher than the vapour pressure of any (Bridgend Investments Limited) (23 June 19 76) volatiles produced but lower than the Br Pat 1 440 041 (23June 1976) Squeeze rollers which can cope with consolidating pressure applied on the A hot sheet of thermoplastics material high mechanical stress and have high outside of the membrane during cure. is placed on a sheet of reinforcement resilience are made by impregnating and vacuum applied to draw the resin a fabric fleece with rubber or plastics, through the reinforcement. The reincoating with more rubber or plastics, Production of carbon and graphite forcement is supported above the helically winding such strips on a fibres vacuum forming table so that the metal core, vulcanising and gridding to (Koppers Company Limited)Br Pat resin can completely encapsulate it, a smooth finish. 1 442 321 (14July 1976) the supports remaining as part of the An aromatic distillate of coal tar is moulded product. oxidised with air at 250 to 450°C: fibres are then spun and carbonized Composite material useful in bearings at a temperature in excess of 800°C. (TBA Industrial Products) Br Pat 1 440 931 (30 June 1976) Improvements in and relating to A layer of ptfe is bonded to a layer Reinforced polyolefm compositions structures of reinforced elastomeric of cured, fibre-reinforced thermosetting (Sumitomo Chemical Company material resin. The ptfe contains a Idler selected limited) Br Pat I 442 527 (14 July (The Goodyear Tire and Rubber from asbstos, glass fibre, ceramic fibre, Company) Br Pat 1 440 081 (23 June 1976) powdered metals, metal oxides, mica 1976) A mechanically strong material can be and mixtures of one or more of these A composite material for use in manumade without the need for special fibre with carbon and/or molybdenum facturing helically wound hose confmishing treatment by mixing a filler disulphide. sists of parallel spaced reinforcement with a crystalline polyolefin which has cords embedded in a matrix of curable been reacted with 0.1 to 10% of an elastomer, the spacing between the unsaturated carboxylic acid or ancords being from ¼ to 4 times the Filled aromatic polycarbonates with hydride and 0.1 to 80% of an oxide or cord width and the matrix being improved properties sulphate of a metal of Group lla, Ilia or either uniformly thick or with a (Bayer Aktiengesellschaft) Br Pat 1Vb or 0.1 to 20% of a hydroxide of maximum thickness in register with 1 441 367 (30 June 1976) magnesium, calcium, titanium or the cords. 10 to 15% hydrophobic quartz can be zirconium.
120
COMPOSITES. APR I L 1977
Anti-static electrically-insulating resinous compositions (BTR Industries Limited) Br Pat 1 437 314 (26 May 1976) Materials, which when cured have resistances greater than 5 x 104~2 but less than 108f2 to give anti-static properties, consisting of a thermosetting resin, such as a polyester, containing 0.I to 0.5% carbon fibres. Improvements in or relating to alloy composite materials (Siemens Aktiengesellschaft) Br Pat 1 438 309 (3June 1976) A composite material based on silver and useful for electrical contact pieces is made by internally oxidising a powdered alloy of silver with one or more metals such as cadmium, zinc, tin, iron, nickel, copper, and lead. Method for preparing composite materials reinforced by graphite whiskers (Kureha Kagaku Kogyo Kabushiki Kaisha) Br Pat 1 438 509 (9 June 1976) Composites with reinforcement orientated in a predetermined direction are made by mixing graphite whiskers with a liquid resin or metal matrix and allowing the material to solidify in a magnetic field strong enough to orientate the whiskers. Cellular composites (Imperial Chemical Industries Limited) Br Pat 1 438 633 (9 June 1976) A strong, light, flexible composite is made by sandwiching continuous filaments between two layers of cellular sheeting, such as polyurethane, and compressing, while heating, to less than 25% of the original thickness.
Hose construction (Imperial-Eastman Corporation) Br Pat I 438 666 (9 June 1976) A tube of aromatic polyester thermoplastic resin is softened on the outside with a solvent, such as chloroform, and a reinforcement layer is applied and bonded to the surface. The solvent is then removed and an outer resin layer may be applied. (See also BrPat 1 439 286 below.)
COMPOSITES. APRIL 1977
Improvement in or relating to metallic composite materials (Siemens Aktiengesellschaft) Br Pat 1 438 698 (9 June 1976) Materials resistant to pitting and burning and useful for heavy duty vacuum switch contacts made of a sintered matrix of molybdenum or tungsten impregnated with a tellurium containing alloy of an element which forms a telluride. Reinforced formaldehyde-based moulding materials (Union Carbide Corporation) Br Pat I 438 783 (9 June 1976) Tough, thermosetting materials which can be injection or transfer moulded consist of formaldehyde based resins containing 5 to 50% by weight of poly (vinylalcohol) fibres having a weight average fibre length of from 0.25-3.2 ram. Improved plastics bearing (Samuel Merle Shobert) Br Pat 1 439 030 (9June 1976) A bearing consisting of ptfe fibres embedded in a resin matrix is made more efficient by increasing the ptfe content in the surface. The fibres are formed into cords with an irregular outer surface and each cord is woven into a fabric which further helps to anchor the fibres against displacement.
The reinforcing action of silica and silicate fillers is increased by additions of sulphur-containing organosilicon compounds of the general formula R3 Si-AIk-Sn-AIk-SiR3.
Hoses (Imperial Eastman Corporation) Br Pat 1 439 286 (16June 1976) A hose is made, avoiding the use of adhesives, with a polyurethane resin tube as a core which is softened on the outside using a suitable solvent. A reinforcing layer is applied under tension and an outer sheath of resin may also be used. (See also BrPat 1 438 666 above.)
Pelletized fibres (National Research Development Corporation) Br Pat I 439 327 {16 June 1976) Fibre-containing pellets suitable for injection moulding are made by extruding the resin into a cross-head die into which is also fed a continuous tow of carbon fibre so as to enclose the fibre in a continuous sheath of resin. The sheathed fibre is cut into pellets preferably 4 to 6 mm long.
Improvements in or relating to manufacture of a composite comprising a metal alloy and a carbonaceous material Opaque composite film (United Kingdom Atomic Energy (FMC Corporation) Br Pat I 439 242 Authority) Br Pat I 439 329 (16 June 1976) (16 June 1976) An economic, heat-sealable, packaging Carbon fibres are impregnated with a film that prevents the passage of blue molten alloy of a metal, which will not light which accelerates the deteriorawet or react with the fibres, containing tion of oil-containing food products, a small amount of a carbide-forming consisting of a layer of regenerated constituent. On solidification the cellulose containing titanium dioxide composite is heated below the melting coated on each side with a thermoplastic point allowing the carbide-forming film-forming resin at least one of these constituent to diffuse to the fibres coating contining an aluminium pigand form a bonding carbide layer. ment dispersion. Rubber mixtures containing reinforcing additives (Deutsche Gold- und SilberScheideanstalt) Br Pat I 439 247 (16 June 1976)
Building a laminate of fibreglassreinforced polyester resin on a spirally rotating mandrel (Filon-Azote) Br Pat 1 439 562 (16 June 1976J
119
A method for making large pipes and tanks using chopped glass roving involves pouring resin from a horizontal surface onto the top of a rotating mandrel, depositing chopped fibres over the resin and pressing the glass into the resin by the pressure of parallel strands of reinforcement wound over it.
Preparation of moulding compositions incorporated into aromatic polycar(B.P. Chemicals Intemational Limited) bonate without substantial molecular Br Pat 1 440 345 (23June 1976) weight reduction or loss of mechanical Stable sheet moulding material, which properties by incorporating 0.1 to rapidly becomes tack-free, is made from 10 parts of a vinyl polymer containing a polyester resin, a polymerisation an alkoxysilane group and an epoxy catalyst and a gelling agent, such as group, such as the copolymer of glycidyl sodium stearate, which is soluble in methacrylate, vinyl triethoxysilane and the hot resin but forms a gel when cold. methyl methacrylate. The mix is heated below the polymerisa(ion temperature, the reinforcement is impregnated and then cooled below Improvements in or relating to asbestosImprovements in or relating to compo30°C to form the gel. reinforced cementitious materials site sheet material comprising a layer (TAC Construction Materials Limited) of polyurethane united with a layer Br Pat I 441 616 (7July 1976) of fibrous sheet material and An improved material made in conprocess for the manufacture thereof Method for producing a substantially ventional manner consists of an (U.S.M. Corporation) Br Pat voidless filament-reinforced resin asbestos-reinforced, hydraulically set 1 439 819 (16June 1976) matrix cement containing, as additional An emulsion of a non-solvent, such as (United Aircraft Corporation) reinforcement, nylon fibre with a length a paraffmic hydrocarbon, in a conBr Pat I 440 610 (23June 1976) from 6 to 32 mm and a diameter of tinuous phase of a reactive polyurethane Primarily intended for high modulus 20 to 300/am. composition, is spread in a layer and fibre used with resin solutions, the heated at a temperature below the method involves loading the mould boiling point of the disperse solvent. with reinforced, uncured, resinImprovements in or relating to the When the polyurethane has partially solvent composition, part of the production of fibre-reinforced gelled a sheet of fibrous material is solvent having been removed leaving synthetic resin articles placed in contact where it adheres. voids. The remainder of the mould is (Hawker Siddiey Aviation Limited) Further heating completes the cure of filled with powdered matrix resin. Br Pat I 441 919 (7July 1976) the resin and removes the non-solvent, Compression moulding forces the resin Voids, due to outgassing during cure, leaving a microporous structure. to f'dl the voids. are prevented by totally enclosing epoxide resin-impregnated reinforcement in a deformable membrane Improvements in roller bodies within which is maintained a pressure Improvements in moulding (Carl Freudenberg) Br Pat 1 440 788 higher than the vapour pressure of any (Bridgend Investments Limited) (23 June 19 76) volatiles produced but lower than the Br Pat 1 440 041 (23June 1976) Squeeze rollers which can cope with consolidating pressure applied on the A hot sheet of thermoplastics material high mechanical stress and have high outside of the membrane during cure. is placed on a sheet of reinforcement resilience are made by impregnating and vacuum applied to draw the resin a fabric fleece with rubber or plastics, through the reinforcement. The reincoating with more rubber or plastics, Production of carbon and graphite forcement is supported above the helically winding such strips on a fibres vacuum forming table so that the metal core, vulcanising and gridding to (Koppers Company Limited)Br Pat resin can completely encapsulate it, a smooth finish. 1 442 321 (14July 1976) the supports remaining as part of the An aromatic distillate of coal tar is moulded product. oxidised with air at 250 to 450°C: fibres are then spun and carbonized Composite material useful in bearings at a temperature in excess of 800°C. (TBA Industrial Products) Br Pat 1 440 931 (30 June 1976) Improvements in and relating to A layer of ptfe is bonded to a layer Reinforced polyolefm compositions structures of reinforced elastomeric of cured, fibre-reinforced thermosetting (Sumitomo Chemical Company material resin. The ptfe contains a Idler selected limited) Br Pat I 442 527 (14 July (The Goodyear Tire and Rubber from asbstos, glass fibre, ceramic fibre, Company) Br Pat 1 440 081 (23 June 1976) powdered metals, metal oxides, mica 1976) A mechanically strong material can be and mixtures of one or more of these A composite material for use in manumade without the need for special fibre with carbon and/or molybdenum facturing helically wound hose confmishing treatment by mixing a filler disulphide. sists of parallel spaced reinforcement with a crystalline polyolefin which has cords embedded in a matrix of curable been reacted with 0.1 to 10% of an elastomer, the spacing between the unsaturated carboxylic acid or ancords being from ¼ to 4 times the Filled aromatic polycarbonates with hydride and 0.1 to 80% of an oxide or cord width and the matrix being improved properties sulphate of a metal of Group lla, Ilia or either uniformly thick or with a (Bayer Aktiengesellschaft) Br Pat 1Vb or 0.1 to 20% of a hydroxide of maximum thickness in register with 1 441 367 (30 June 1976) magnesium, calcium, titanium or the cords. 10 to 15% hydrophobic quartz can be zirconium.
120
COMPOSITES. APR I L 1977