Dynamit Nobel Aktiengesellschaft

Huels Troisdorf Ag

Richard Weiss

Paul Spielau

Manfred Simon

Karl-Heinz Spiess

Werner Kuhnel

Hans-Ulrich Breitscheidel

Manfred Simm

Peter Putz

Bertram Gasper

Herbert Laubenberger

Erwin Moschter

Alexander Hover

Gunther Tappe

Josef Becker

Hansfritz Schraube, Deceased

Rudolf Kautz

Gerd Klingberg

Karlo Klaar

Herbert Schulte

Karl-Gunter Scharf

Horst Ulb

Jurgen Fenske

Hans-Joachim Kaseler

Eberhard Jaeger

Walter Gerber

Gerhard Dost

Helmut Fassbender

Bertram Gaspar

The invention concerns a homogenous, in particular multicolored plastic sheet or panel, based on ethylene vinyl acetate copolymer (EVA) as binder with a filler content of 30 to 80 wt. % and a process for producing it. In other embodiments the binder contains, in addition to the 70 to 85 wt. % of EVA, polypropylenes to improve the processability (tendency to adhere), EPDM to improve the flexibility, and polyethylenes to reduce the tendency to soiling. In the process described, several additives, each consisting of a binder containing at least some ethylene vinyl acetate copolymer, up to 80 wt. % of fillers and up to 5 wt. % of pigments, are mixed, plasticized and granulated or comminuted to form granules or chips of assorted colours which are mixed and, possibly after other processing operations, pressed to form the plastic web or plates.

Homogenous, particularly multicolor-structured synthetic resin sheet or

A process for the production of homogeneous flat articles of thermoplastic synthetic resins wherein a starting mixture based on thermoplastic synthetic resins is processed into agglomerate or granulated material by a thermal pretreatment above the softening temperature and subsequently, optionally after additional intermediate steps, is mechanically comminuted to a mixture of particles having a random grain size distribution. The mixture of particles is piled continuously onto a conveyor belt to form a uniform layer and is sintered, under the action of heat up to the plasticization of the thermoplastic synthetic resin, into a coherent flat articles and is then press-molded under the effect of pressure and heat. The pourable powders or particles are formed from a blend of differently colored agglomerates or granules prepared in a predetermined mixing ratio; the blend being obtained from several colored batches of thermoplastic resin, each batch having a different color from the other and each batch being heat treated above the softening point of the thermoplastic resin. In one variation of the process, at least one liquid or pourable, meltable, colored medium is applied in predetermined patterns and penetrates into the sintered layer up to a desired depth, in particular throughout the entire layer thickness; and thereafter the dyed, sintered layer is compressed under the action of pressure and heat into a compact flat article.

Process for the production of dyed, flat articles from thermoplastic

The invention describes a weatherable, plasticizer-free, uncrosslinked, and deep-drawable sheet, especially for the internal outfitting and external outfitting of automotive vehicles, as well as a process for its production, containing 65-25% by weight of a partially crystalline ethylene-propylene-diene terpolymer and 35-75% by weight of a homo- and/or copolymer of propylene, 0-10% by weight of fillers, as well as stabilizers and lubricants, the extruded or calendered sheet exhibiting a tensile strength at break in the longitudinal direction of at least 20 N/mm.sup.2. An advantageous further development of the invention comprises a composite sheet of EPDM/PP sheet with a crosslinked polyolefin foam layer.

Multi-ply weatherable plasticizer-free sheet

A process for the production of semifinished products and/or molded components from polypropylene by grafting thereto an alkoxysilane compound in the presence of an organic peroxide involves mising the polypropylene, the silane compound, and the peroxide and subsequently plasticizing and extruding at a temperature of about 170.degree.-240.degree. C. The process utilizes an essentially isotactic homopolymer of propylene with a density of about 0.90-0.91 g/cm.sup.3 and a melt index MFI (#.degree. C./5 kp) of smaller than 0.7 g/10 min, preferably smaller than 0.1 g/10 min, and with a molecular weight higher than 5.multidot.10.sup.5. An initially non-crosslinked semifinished product is obtained.

Process for the production of semifinished products and/or molded

A laminate based on epoxy resin for printed circuits has epoxy resin-impregnated outer plies, each containing a substrate of glass fibers and epoxy resin-impregnated core plies, each containing a flat textile form or construction made of synthetic thermoplastic fibers.

Laminate based on epoxy resin for printed circuits

A forgery-proof flat article, for example, for the production of banking cards, credit cards, and the like, is provided with a security feature analogous to a watermark and is made of thermoplastic and elastomeric synthetic resins based on transparent, translucent, or colored sheets made by extrusion, calendering, blow-molding, or spread coating, or composite sheets therefrom, with an application of a colorant, capable of migrating, to the surface in the presence of a crosslinkable component in the flat article and/or in the colorant application. The colorant application, upon reaching the desired migration depth of the applied colorant, is fixed in the flat article by a crosslinking reaction. This flat article, by the use of two differently quickly migrating colorants, has a coloring showing on both sides of the flat article the security feature in congruence, this security feature appearing on the topside in the color of the more rapidly migrating colorant and, when the article is viewed while held up to the light, appearing in the form of the mixed color. Special effects are obtained in one embodiment of a composite flat article wherein one sheet side, treated with two different colorants, is bonded by laminating to a further sheet. After penetration of the colorants and fixation, the security feature is visible on both sides of the sheet and recognizable in the mixed color when the article is held up to the light and viewed in this way.

Forgery-proof flat article of a synthetic resin, and process for the

A process for manufacturing porous textile substrates impregnated with thermoplastic polymeric pastes, especially fleeces or mats, with subsequent gelling out of polymeric paste, which comprises penetrating impregnating one side of a textile substrate with an evacuated paste comprised of a vinyl polymer and/or copolymers of vinyl chloride, while effecting complete displacement of air through the paste and compactly impregnating said substrate.

Thermoplastic resin paste impregnated substrates

A shaped article of a polymeric material has a shaped structure containing at least one polymeric component which is weldable, e.g. by heat, and at least one polymeric component which can be crosslinked by high-energy radiation. The crosslinkable polymeric component is homogeneously distributed within the shaped structure and is crosslinked at least partially in a part of the shaped structure, including at least a portion of the shaped structure.

Shaped article of a synthetic resin and/or natural rubber and process

A process for the production of decorated molded articles wherein a base article is produced by casting and/or compression molding from a hardenable substance containing a minor amount of a thermosetting synthetic resin and a hardener therefor, and a major amount of at least one inert filler, and, optionally, accelerators, colorants and other auxiliary materials and by providing the article with a surface layer of hardenable lacquer resin.

Process for the production of molded decorative articles from a

A string for the stringing of rackets, bows, musical instruments and the like has a thread-like structure comprising at least one monofil of a synthetic resin mixture containing 99-86% by weight of polyvinylidene fluoride and 1-14% by weight of at least one polyacrylate. The monofil is melt-extruded and is stretch-oriented to impart improved elasticity thereto.

String of a vinylidene fluoride synthetic resin composition

An insulating panel suitable for the covering of roof structures includes a core layer of a synthetic foam material bonded adhesively on its top side to a sealing thermoplastic layer. The core layer is formed of an elastic closed-cell crosslinked polyolefin foamed material.

Insulating panel for roof coverings

A string for the stringing of rackets, bows, musical instruments and the like which has a thread-like structure of polyvinylidene fluoride. The string is obtained by extruding a rod of polyvinylidene fluoride at a melt temperature of the polyvinylidene fluoride, cooling the rod at a temperature between 60.degree.-150.degree. C., and then axially stretching the rod at this temperature following by cooling the rod to room temperature and thereafter cold-stretching the monofil. The string is characterized by an elasticity that approaches that of natural gut string.

String of a synthetic resin

A process for producing colored synthetic resin sheet material having a unicolored or multicolored dye coating applied to one surface thereof and extending into said surface in a uniform manner involves applying a dye-containing material or composition to at least one selective portion of the surface of a synthetic resin sheet material that contains at least one reactive, crosslinkable component, where the dye-containing material is capable of migrating into a non-porous sheet formed of the synthetic resin; controlling the migration of the dye material into the sheet material to a desired depth; and then initiating crosslinking of the crosslinkable component to stop further migration of the dye-containing material.

Process for the production of a synthetic resin sheet material which is

A process for preventing separation of fillers and other dispersed additives from thermoplastic molding compositions during extrusion, calendering or like processing, along metallic contact surfaces of a processing unit, involves admixing a silane additive to a portion of a thermoplastic molding composition containing a thermoplastic molding resin and at least one filler or other dispersed additive that tends to separate out from the molding composition during the processing, processing the portion of thermoplastic molding composition in a processing unit, measuring the electrical energy applied to the processing unit during processing per kilogram of molding composition per unit time, determining if the electrical energy applied has been increased by the addition of the silane additive as compared to the electrical energy required per kilogram of molding composition per unit time for processing another portion of the thermoplastic molding composition free of the silane additive and thereafter adding an effective amount of the silane additive determined to be capable of increasing the applied electrical energy required to process the molding composition by at least 20% with the thermoplastic molding composition and processing the resulting thermoplastic molding composition in the processing unit. Among the silane additives disclosed as being suitable for this process are .beta.-chloroethyl triethoxysilane and vinyl trialkoxysilanes containing alkoxy groups having from 1 to 6 carbon atoms.

Growing community of inventors

Troisdorf, Germany

Richard Weiss