Classifications

• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
  • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
  • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
  • C04B41/48—Macromolecular compounds
  • C04B41/4826—Polyesters
• • C—CHEMISTRY; METALLURGY
  • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
  • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
  • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
  • C04B26/02—Macromolecular compounds
  • C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S522/00—Synthetic resins or natural rubbers -- part of the class 520 series
  • Y10S522/91—Treatment through an external filter or mask, nonphotograghic process

Definitions

• the invention relates to a process for the production of bodies from filled plastic according to the preamble of the first claim.
• the invention also relates to a product of this process.
• the object of the invention is to avoid the disadvantages mentioned at the outset and to increase or at least keep the mechanical strength, in particular the tensile strength, of composite bodies, while at the same time simplifying and reducing the cost of their production.
• the bodies should also have a minimal residual porosity and a minimal susceptibility to liquid media such as acids, alkalis, organic solvents and waste water.
• Optimal properties of the composite body can only be achieved if the filler, the prebinder and the reaction mass are matched to one another in terms of quality and quantity, since the filler grains with the silane coupling agent; the prebinder and the reaction mass must enter into a non-positive and resistant connection.
• the leakage losses are negligible due to the sealing of the molding.
• the oven is also protected.
• the pot times of the reaction masses to be processed can be selected for a very long time.
• a dust-free, high-quality and inexpensive quartz sand is advantageously considered as filler. In any case, no pre-binder may be sucked up by the filler, because this would represent a loss of pre-binder.
• the prebinder should wet the quartz grain surface well.
• the prebinder should preferably be cold curing be so that there are no heating costs. All of this benefits both the quality of the end product and the economy.
• the open-pore, self-supporting, dimensionally stable molding can be produced in various ways known per se. This means that the conventional and proven molding tools can also be used.
• the molding can be produced by shooting the filler and the binder into the cavity of a molding tool by means of an air stream or an air blast.
• the binder can harden quickly by means of a chemically triggered baking process, so that the molding can be removed from the molding tool quickly, which means a high degree of utilization of the molding tool.
• a volumetric degree of compaction from a minimum of 0.5 to 0.85 can easily be achieved.
• a degree of compaction of 0.8 the volume of the molded part is 80% filled with filler, so that only the pore volume of 20% is then filled with reaction resin compound. Since the resin mass is more expensive than e.g. Sand as filler, this small proportion, viewed from the components, is inexpensive.
• a commercial UV radiation source can be connected downstream of a vacuum pressure impregnation system. Although acrylates also react with UV, they are less suitable because they are more brittle.
• condensation resins e.g. Phenol formaldehyde and addition resins, e.g. Epoxy
• Epoxy addition resins
• an immersion liquid which, in terms of density, corresponds approximately to the density of the reaction mass. It is therefore not absolutely necessary to use the The mass of molded products flooded with UV radiation immediately after removal of the vacuum impregnation chamber. It is desirable, however, since tests have shown that the reaction mass under the influence of UV and the atmospheric oxygen quickly produce a stickiness that is difficult to remove. which is completely avoided if UV radiation takes place in the bathroom.
• the liquid must be indifferent to the reaction mass and transparent to UV rays, so that the pores can be sealed or the outer reaction mass layers can be gelled by the UV rays in the container. Glycol and glycerine, the mixture of which can be tailored precisely to the density of the reaction mass, are suitable.
• the composite body produced according to the invention has an extraordinarily good resistance to many inorganic chemicals such as aqueous acids, bases and salts. Organic chemicals - with the exception of certain solvents - also do not cause any damage.
• the same type of thermoset can be used both as a prebinder and as a reaction resin compound. A total proportion of thermoset of about 20% (by weight) can be produced in this way.
• Particularly suitable particulates are brittle, mineral substances, preferably quartz, but also basalt, chrome ore, zirconium silicate, slate, mica, calcium carbonate, fireclay porous, olivine, glass, grit, iron powder, particularly suitable for the production of composite bodies according to the invention.
• -oxid, Alu iniumgri -powder, -oxid, magnetite, barium ferrite, carbon black, graphite, kaolin chalk, potassium titanate and foundry slag as suitable.
• organic substances such as ground, wood flour, coconut shells, cork can also be used.
• Fibrous particles would also be suitable, for example glass fibers, metal fibers such as steel wool, polypropylene fibers and wood fibers.
• the strength of the bodies produced according to the invention depends on the grain size or the grain size distribution of the fillers used. For each composition of the fillers, therefore, an optimal limit grain size is to be used which, in interaction with the binders used, results in the highest possible strengthening factor for the body according to the invention. Silanized fillers can be used to further increase the tensile strength.
• a grain size range for at least 90% by weight of the filler is between 10 .mu.m and a maximum of one third of the thinnest wall thickness of the shaped body.
• the fillers used can be both approximately spherical, e.g. Grains of sand, as well as being fibrous, depending on the desired tensile strength.
• non-hydraulic prebinders are suitable as non-hydraulic prebinders:
• Water glass which is subsequently gassed with CO, furan resin (thermal or catalytic), urea-melamine resin, vinyl acetate resin, phosphonitrile chloride, sulfite waste liquor and linseed oil, isocyanates, isocyanate with resol, isocyanate with melamine, radiation-cured, unsaturated polyester resins, Phosphoric acid with aluminum oxide or monoaluminophosphate, phenolic resin, acrylate resin, resin in solvent, polystyrene in toluene, silester.
• the proportion of binder should be max. 10% by weight, preferably in a minimal concentration, i.e. less than 2% by weight based on ⁇ E ⁇ i
• OMPI IPO the molding, in order to ensure the dimensional stability during manipulations and when filling with reactive resin compound.
• compatibility with the binder should be taken into account.
• the prebinder can be silanized.
• the content of chemically or physically bound water in the open-pore molding should be preferably zero, max. 1% by weight so as not to interfere with the subsequent hardening of the reaction resin.
• the usual additives such as catalysts, accelerators, stabilizers, dyes, light stabilizers, adhesion promoters, lubricants, thixotropic agents, etc. can be added to the reaction resins.
• the curing or crosslinking should take place using pressure and / or temperature by polyaddition on the prebinder or polycondensation on the prebinder or radical polymerization.
• the molded article before the Aus ⁇ fill is heated with the reaction resin composition, so that the 'a crafted liquid resin is made to cure or to gel.
• the reaction resin composition can also be expediently cooled in order to obtain long pot times.
• the gelling process can best be carried out in a tempered medium and preferably under increased pressure.
• the properties of the new composite bodies are largely determined by the specific properties given the high proportion of filler and the high degree of compaction mentioned above.
• bodies with an increased dielectric constant, with a certain ohmic resistance, with magnetic properties or with a certain heat capacity can also be produced by a suitable choice of the filler.
• the possible uses of the composite bodies produced according to the invention are extremely diverse, largely coincide with those of synthetic resin concrete and include the following objects:
• Coupling rope dampers road caps, insulators, pipes, railway sleepers, milestones, boundary markings, guide marks, fence posts, laths, drainage lines, cable ducts, profile parts for stream bed regulation, segments for clarifier construction, shafts, cups, sewage pipes, collecting basins for sewage ⁇ water, caissons, manhole covers, compensation wedges, bridge abutments, tubs, facades, wall elements, flat roof elements,.
• Roles e.g. Roller skate rollers, bricks, flower pots, pedestals, curbs, vases, benches, planters, housings, cams, pan handles, lid buttons, shells, fuses, artificial stones, dielectrics, tiles, tiles, paving stones, containers, water basins, ashtrays, Bach shells.
• quartz sand 760 g or 60% by volume of quartz sand are mixed with 10 g of a binder which contains phenol formaldehyde resin, isocyanate resin and a catalyst and brought into a mold in a conventional manner.
• the resulting molding is heated to 80 C and evacuated in a vacuum chamber.
• a reaction resin composition of an unsaturated polyester resin which mainly consists of Polylite 8007 and a catalyst, an initiator
• OMPI tiator and contains a UV sensitizer are fed to the molding.
• any air bubbles can be removed by vacuum.
• the molded product, which is flooded with reaction resin compound, is then transferred to a glass bath and then UV-irradiated for a few minutes.
• the gelation of the inner layers takes several hours, in the order of 10 hours. It can take place at a low temperature, for example -10 C, at a storage location.
• the reaction mass can crosslink, which is best done at room temperature or at low temperature, so that the mass does not expand and the sealing shell breaks. 1The final curing takes place at, for example, 40 ° C. for hours.
• the body produced in this way had the following properties:
• Binder content 1.0% by weight
• Thermoset content 20.5% by weight
• the properties of a composite body can be improved by reinforcing inserts and or anchoring, e.g. made of metal.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Ceramic Engineering (AREA)
• Materials Engineering (AREA)
• Structural Engineering (AREA)
• Organic Chemistry (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Processes Of Treating Macromolecular Substances (AREA)
• Panels For Use In Building Construction (AREA)
• Building Environments (AREA)
• Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
• Casting Or Compression Moulding Of Plastics Or The Like (AREA)

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Publications (1)

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Family Applications (1)

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Cited By (3)

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Citations (7)

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• 1979
  • 1979-07-18 JP JP50108079A patent/JPS55500517A/ja active Pending
  • 1979-07-18 AT AT79900776T patent/ATE2262T1/de active
  • 1979-07-18 DE DE7979900776T patent/DE2964534D1/de not_active Expired
  • 1979-07-18 WO PCT/CH1979/000104 patent/WO1980000249A1/de not_active Ceased
  • 1979-07-18 US US06/192,518 patent/US4364879A/en not_active Expired - Lifetime
• 1980
  • 1980-02-25 EP EP79900776A patent/EP0016093B1/de not_active Expired

Patent Citations (7)

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