Dynamit Nobel Aktiengesellschaft

Huels Troisdorf Ag

Werner Kuhnel

Paul Spielau

Manfred Simm

Gerd Klingberg

Richard Weiss

Hans E Konermann

Wilfried Leeder

Dietmar Welsch

Hans-Ulrich Breitscheidel

Rudolf Kautz

Peter Putz

Karlo Klaar

Karl-Gunter Scharf

Horst Ulb

Jurgen Fenske

Horst Vohwinkel

Bertram Gaspar

Henk Van Der Mey

Johan Harmsen

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 laminate is made of textile sheet structures of synthetic fibers or glass fibers with a covering of polypropylene. The polypropylene is crosslinked by addition of crosslinking agents. The laminate has good electrical insulating properties, perfect solder bath stability, and good mechanical machinability. This laminate is provided, in heated presses, with metal layers or can be provided, in heated presses, with metal layers or can be provided with such metals layers by the application of metallic foils or by electrolytical methods, and serves for the manufacture of printed circuits and ribbon cables. An advantageous production of the textile sheet structures encased with crosslinked polypropylene can be performed on roll stands by thermoplastic encasing and smoothing in a continuous process.

Laminate of fiber-reinforced, crosslinked polypropylene

The invention describes a multi-ply, self-adhesive and deep-drawable protective sheet, especially for the internal and external outfitting of automotive vehicles, consisting of a carrier sheet containing a thermoplastic synthetic resin based on an ethylene-propylene-diene terpolymer and/or an ethylene-propylene copolymer and a homo- and/or copolymer of propylene, small amounts of fillers and conventional additives; a pressure-sensitive adhesive layer based on an alkyl acrylate and/or methacrylate and/or a copolymerizable, ethylenically unsaturated monomer, such as acylic acid, and a cover layer of a unilaterally siliconized polyolefin film.

Multi-ply self-adhesive and deep-drawable protective sheet, especially

An expandable molding composition for the production of a cross-linked foam material, and a process for the manufacture of the foam from a mixture of polyolefin and a selected, partially crystalline ethylene-propylene terpolymer, a blowing agent, and optionally a crosslinking agent are disclosed.

Molding composition for crosslinked foam material from polyolefins and

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 method for producing foam polyolefin products which are light-stable and weather-resistant are obtained by the combined use of the following stabilizers:

Light-resistant and weather-proof polyolefin foams

Method for the preparation of light-resistant and weather-proof

A sealing sheet for the building industry made up of at least one layer which contains an elastomeric synthetic resin that is devoid of, i.e., free of vulcanization accelerator, and that contains fillers, especially carbon admixed with an ethylene-propylene-diene terpolymer and/or ethylene-propylene copolymer and which has, on the outside and/or between layers of a synthetic resin, a reinforcing layer laminated in place with the use of heat and comprised of a fabric, a mat, a knitted material, a nonwoven material, or a similar material formed of a synthetic resin and/or of glass fibers.

Sealing sheet of elastomeric synthetic resins with textile reinforcement

A multi-layered sealing sheet for the building industry is prepared so that all plies which contain elastomeric synthetic resins are devoid of vulcanization accelerator and consist of an elastomeric synthetic resin on the basis of ethylene-propylene-diene terpolymers and/or ethylene-propylene copolymers. A reinforcing insert is laminated in between the layers with the use of heat and is a fabric, a mat, a knitted material, or a similar material of synthetic resin fibers and/or glass fibers.

Multi-layered sealing sheet of elastomeric synthetic resin

An improved process for the foaming of polyolefin materials is disclosed where the polyolefin is crosslinked by a peroxide and foamed by a chemical foaming agent combined with an auxiliary foaming agent is disclosed. According to the invention, the auxiliary foaming is a sterically hindered phenol and/or an organic phosphorus compound.

Process for the production of foamed materials from polyolefins

A molding composition contains an ester-compatible, thermoplastic and/or elastomeric synthetic resin, optionally other additives including plasticizers, stabilizers, pigments, mold lubricants fillers, antioxidants, high-polymeric additives and bitumen and the DMT distillation residue formed during the manufacture of dimethyl terephthalate by the Witten process. Generally the composition contains at least 5 parts by weight of the residue per 100 parts by weight of the synthetic resin.

Molding compositions based on ester-compatible thermoplastic and/or

A ternary molding composition is formed of an admixture of a modified ethylene-propylene copolymer, a propylene polymer and polyethylene and contains 35-50% by weight of a modified ethylene-propylene copolymer, which is prepared by the polymerization of an ethylene-propylene copolymer onto polyethylene, with the ethylene content of the ethylene-propylene copolymer being at least 65% by weight and the modified copolymer having a melt index MFI (230/5) of 0.8-2.0 g/10 min; 30-60% by weight of polypropylene with a melt index MFI (230/5) of 25-65 g/10 min and/or propylene-ethylene copolymer with a melt index MFI (230/5) of 15-50 g/10 min, and 3-30% by weight of polyethylene, wherein the polyethylene block of the modified ethylene-propylene copolymer can be attributable to the quantity of polyethylene contained in said composition.

Ternary thermoplastic molding composition containing ethylene-propylene

A ternary molding composition formed from an admixture of ethylene-propylene copolymer, polypropylene homopolymer, and polyethylene, which comprises 38-48% by weight of a partially crystalline ethylene-propylene copolymer with an ethylene content of at least 65% by weight, a melt index MFI (230/5) of 0.7-2.0 g/10 min, and a tensile strength of higher than 5.0 N/mm.sup.2 ; 27-63% by weight of a polypropylene homopolymer with a melt index MFI (230/5) of 25-65 g/10 min; and 3-30% by weight of polyethylene with a melt index MFI (230/5) of 15-20 g/10 min, the molding composition having a melt index MFI (230/5) of at least 8 g/10 min, a tensile strength of at least 15 N/mm.sup.2 and an elongation at yield of at least 450%.

Ternary thermoplastic molding composition containing polypropylene

A ternary molding composition is formed of an admixture of ethylene-propylene copolymer, propylene polymer, and polyethylene and contains 30-45% by weight of a partially crystalline ethylene-propylene copolymer with an ethylene content of at least 65% by weight; a melt index MFI (230/5) of 0.7-2.0 g/10 min, and a tensile strength higher than 5.0 N/mm.sup.2 ; 35-65% by weight of propylene polymer with a melt index MFI (230/5) of 15-50 g/10 min, and 3-30% by weight of polyethylene with a melt index MFI (230/5) of 15-50 g/10 min, said molding composition having a melt index MFI (230/5) of at least 8 g/10 min and a tensile strength of at least 15 N/mm.sup.2 and an elongation at yield of at least 450%.

A process is described for the production of foamed plastics from polyolefins by peroxide crosslinking and foaming by means of a chemical foaming agent under conditions of normal pressure the improvement wherein said foaming is carried out in the additional presence of a finely divided magnesium oxide and/or magnesium hydroxide and/or magnesium-hydroxide carbonate.

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Neunkirchen-Schoneshof, Germany

Werner Kuhnel