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Epoxide resin mixtures
compressed. Subsequent curing and carbonization produce a crack-free porous carbon structure, Method and bi-laminate sheet for reinforcing sheet material (Keith Pedler, Australia) Br Pat 1 545 060 (2 May 1979) A method of forming hollow-dish shapes on a fiat base by inflating the uncured grp with air from a hypodermic is described.
Prefabricated wallelement (Hunter Douglas Industries BV, Holland) Br Pat 1 545 240 (2 May 1979) A sandwich construction in which the inner is a corrugated sheet is described. The cavity can be used for sound modifying materials or services. It is made from two identical structures. Polymer composites (Dunlop Limited, England) Br Pat I 545 468 (10 May 1979) Porous rubber reinforcing fillers such as carbon black or silica are sandwiched between a vulcanized rubber sheet and a thermoplastic or different rubber sheet. Improvements in or relating to graft copolymers (Secretary of State for Defence, London) Br Pat I 545 482 (10 May 1979) A method is described where surface oxidized polyolefines are grafted with, say, polyacrylic acid and dipped in, say, chromic phosphate solutions. The resulting inorganic coating fuses to glass at temperatures below the Tm of the polymer. Reduced permeability to gases and liquids is achieved, Pipe and manufacture thereof (ICI, England)BrPat1545778(16 May 1979) Centrifugally spun fibre-reinforced resin pipes (cf Br Pat 1 522 474) tend to have resin rich inside layers, This can be overcome by additions of particulate filler to the matrix, Rigidifiable flexible element and articles made therefrom (J.S. Boyden, W.W. Epstein and P.W. Boyden, USA) Br Pat 1 545 947 (16 May 1979) A novel orthopedic cast is described, A polymerizable composition
248
enclosed in a polymer sleeve is set by irradiation with UV light. A number of such elements make up the structure.
Synthetic slate (Kumal Associates) Br Pat 1 546 120 (16 May 1979) Taconite iron ore (1-5% magnetite) railings can be bound with vf or mf resins and moulded into a slate, Method and apparatus for producing composite glass tubing (Corning Glass Works, USA)BrPat 1 546 203 (23 May 1979) A method of making glass tubing c o m p o s e d of three layers is described, Epoxide resin mixtures (Ciba-Geigy AG, Switzerland) Br Pat 1 546 323 (23 May 1979) Laminates from polyimide epoxide resins have higher thermal stability (>200°C) than conventional epoxides. Precipitated silica ( D e u t s c h e G o l d - u n d SilberScheideanstalt, West Germany) Br Pat 1 546 325 (23 May 1979) A silica treated with silicones suitable for polymer filling is described. Hardenable compositions (NRDC, England) Br Pat l 546372 (23 May 1979) A resin/refractory core material is described which has a good surface finish and can be readily broken for removal from a casting, Process for the preparation of shaped objects from reinforced carbon (Shell Internationale Research, Maatschappij BV, Holland)Br Pat I 546 802 (31 May 1979) Organic fibres such as pan (possibly oxidized) are mixed with a petroleum residue and then chopped with small pieces which can be compression moulded and subsequently carbonized. Increased densities were achieved by further impregnation and carbonizations. Good wear properties are claimed for a phosphate modified material. The production of fibre-reinforced synthetic resin articles (Hawker Siddeley Aviation
Limited, UK) Br Pat 1 546 899 (31 May 1979) High volume fractions of carbon fibres can be achieved from a laminate consisting of alternate layers of dry fibre sheet and prepreg such that the excess resin of the latter wets-out the former during moulding.
Mouldings with a smooth surface, made from glass fibre-reinforced plastics material (B.A.S.F. Akt, West Germany) Br Pat 1 547 280 (6 June 1979) Smooth surfaces to long glass fibrer e i n f o r c e d thermoplastics are achieved by sandwiching 2 glass fibre mats impregnated with a polymer (say polypropylene) melt between thin extruded short glass fibre or particulate filled (say 10% glass beads) thermoplastic sheets. The hot laminate can be compression moulded into a cold mould. Composite building module (Maro-Therm Corporation, USA) Br Pat 1 547 369 (13 June 1979) A process is described for the manufacture of glass fibre-reinforced cement-encased rigid polyrethane foam. The surface of the foam keys the core to the cement. Composite building module (Maro-Therm Corporation, USA) Br Pat 1 547 370 (13 June 1979) Whereas 1 547 369 utilizes a prefoamed core, this patent describes 'in situ' foaming in a mould coated with glass fibre-reinforced cement, to produce a cement encapsulated foam. Thin cement coatings only are required for good fire resistance. A process for hydrophobising silicas and silicates ( D e u t s c h e G o l d - u n d SilberScheideanstalt) Br Pat 1 547 421 (20June 1979) High boiling silanes are used to coat dry fluidized silica and silicates at about 300°C.
Method of producing needle'like I I anhydrite gypsum (Governor of Hyogo Prefecture of Japan) Br Pat 1 547 424 (20 June 1979) A process for producing needle-like gypsum from ~ - hemihydrate gypsum needles is described.
COMPOSITES. OCTOBER 1979
Prefabricated wallelement (Hunter Douglas Industries BV, Holland) Br Pat 1 545 240 (2 May 1979) A sandwich construction in which the inner is a corrugated sheet is described. The cavity can be used for sound modifying materials or services. It is made from two identical structures. Polymer composites (Dunlop Limited, England) Br Pat I 545 468 (10 May 1979) Porous rubber reinforcing fillers such as carbon black or silica are sandwiched between a vulcanized rubber sheet and a thermoplastic or different rubber sheet. Improvements in or relating to graft copolymers (Secretary of State for Defence, London) Br Pat I 545 482 (10 May 1979) A method is described where surface oxidized polyolefines are grafted with, say, polyacrylic acid and dipped in, say, chromic phosphate solutions. The resulting inorganic coating fuses to glass at temperatures below the Tm of the polymer. Reduced permeability to gases and liquids is achieved, Pipe and manufacture thereof (ICI, England)BrPat1545778(16 May 1979) Centrifugally spun fibre-reinforced resin pipes (cf Br Pat 1 522 474) tend to have resin rich inside layers, This can be overcome by additions of particulate filler to the matrix, Rigidifiable flexible element and articles made therefrom (J.S. Boyden, W.W. Epstein and P.W. Boyden, USA) Br Pat 1 545 947 (16 May 1979) A novel orthopedic cast is described, A polymerizable composition
248
enclosed in a polymer sleeve is set by irradiation with UV light. A number of such elements make up the structure.
Synthetic slate (Kumal Associates) Br Pat 1 546 120 (16 May 1979) Taconite iron ore (1-5% magnetite) railings can be bound with vf or mf resins and moulded into a slate, Method and apparatus for producing composite glass tubing (Corning Glass Works, USA)BrPat 1 546 203 (23 May 1979) A method of making glass tubing c o m p o s e d of three layers is described, Epoxide resin mixtures (Ciba-Geigy AG, Switzerland) Br Pat 1 546 323 (23 May 1979) Laminates from polyimide epoxide resins have higher thermal stability (>200°C) than conventional epoxides. Precipitated silica ( D e u t s c h e G o l d - u n d SilberScheideanstalt, West Germany) Br Pat 1 546 325 (23 May 1979) A silica treated with silicones suitable for polymer filling is described. Hardenable compositions (NRDC, England) Br Pat l 546372 (23 May 1979) A resin/refractory core material is described which has a good surface finish and can be readily broken for removal from a casting, Process for the preparation of shaped objects from reinforced carbon (Shell Internationale Research, Maatschappij BV, Holland)Br Pat I 546 802 (31 May 1979) Organic fibres such as pan (possibly oxidized) are mixed with a petroleum residue and then chopped with small pieces which can be compression moulded and subsequently carbonized. Increased densities were achieved by further impregnation and carbonizations. Good wear properties are claimed for a phosphate modified material. The production of fibre-reinforced synthetic resin articles (Hawker Siddeley Aviation
Limited, UK) Br Pat 1 546 899 (31 May 1979) High volume fractions of carbon fibres can be achieved from a laminate consisting of alternate layers of dry fibre sheet and prepreg such that the excess resin of the latter wets-out the former during moulding.
Mouldings with a smooth surface, made from glass fibre-reinforced plastics material (B.A.S.F. Akt, West Germany) Br Pat 1 547 280 (6 June 1979) Smooth surfaces to long glass fibrer e i n f o r c e d thermoplastics are achieved by sandwiching 2 glass fibre mats impregnated with a polymer (say polypropylene) melt between thin extruded short glass fibre or particulate filled (say 10% glass beads) thermoplastic sheets. The hot laminate can be compression moulded into a cold mould. Composite building module (Maro-Therm Corporation, USA) Br Pat 1 547 369 (13 June 1979) A process is described for the manufacture of glass fibre-reinforced cement-encased rigid polyrethane foam. The surface of the foam keys the core to the cement. Composite building module (Maro-Therm Corporation, USA) Br Pat 1 547 370 (13 June 1979) Whereas 1 547 369 utilizes a prefoamed core, this patent describes 'in situ' foaming in a mould coated with glass fibre-reinforced cement, to produce a cement encapsulated foam. Thin cement coatings only are required for good fire resistance. A process for hydrophobising silicas and silicates ( D e u t s c h e G o l d - u n d SilberScheideanstalt) Br Pat 1 547 421 (20June 1979) High boiling silanes are used to coat dry fluidized silica and silicates at about 300°C.
Method of producing needle'like I I anhydrite gypsum (Governor of Hyogo Prefecture of Japan) Br Pat 1 547 424 (20 June 1979) A process for producing needle-like gypsum from ~ - hemihydrate gypsum needles is described.
COMPOSITES. OCTOBER 1979