DE1071332B - - Google Patents

Description

Applicant:

Mannesmann Aktiengesellschaft,
Düsseldorf, Mannesmannufer 1 b

Dr. Ewald Dietzel, Gelsenkirchen-Buer,

and Karl Heinz Frassik, Gelsenkirchen,

have been named as inventors

Tensile strength 294 kg / cm ²

Elongation 200%

Alternating bending strength 10000

A plate manufactured under the same conditions, but in which heavy spar is used instead of coke showed the following values:

Tensile strength 258 kg / cm ²

Elongation 714%

Alternating bending strength 8000

The plate was not high-gloss, but showed strong adhesive properties when pressed, which also could not be completely eliminated by the usual lubricants such as silicone oil.

The tensile strength of the coke-filled material was significantly higher; the stretch was on A measure that avoids the "cold flow" of the material is pushed back.

P A T H N T Λ NSPRUCII:

Process for the production of plastically deformable masses from polyethylene and fine powdery Coke, preferably low-ash or ash-free coke, according to patent application E 12669 IVb / 39b, characterized in that the polyethylene is less than a quarter of its weight incorporated into finely powdered coke in a manner known per se.

Considered publications:
Industrial and Engineering Chemistry, Vol. 42,
P. 849.

© 909 639/582 12.59

Claims (1)

GERMAN The main patent application E 12669 IVb / 39b relates to a process for the production of plastic deformable masses of polyethylene and fine-powdered coke, the 4 parts of polyethylene at least 1 part koke included. The process of the main patent application E 12669 IV'b / 39.b is based on the knowledge that easily malleable, z. B. sprayable, molded articles with excellent mechanical properties and good surface properties leading polyethylene compositions can be obtained by adding relatively large amounts of fine-powdered coke. The use of coke as a filler for polyethylene was previously unknown. The ones used so far Fillers were made up of other finely ground solids that are used in for pigments usual amounts, e.g. about 2 to 3%, were used. In a further development of the process of the main patent application, it has now been found that the Addition of relatively small amounts, e.g. B. 5%, fine powdered coke as a substantial additive Has advantages over the known pigment fillers. Even with the addition of less than 20% coke, based on the total mass, the shock and impact sensitivity is considerable and the elongation in surprisingly reduced, with moldings obtained with excellent surface properties will. Particularly good results are achieved when using low-ash or ash-free cokes, in particular Coal coke or petroleum coke or pitch coke also received. Even with the relatively small addition of fine powdery coke according to the invention, the tensile strength is increased compared to unfilled polyethylene or polyethylene filled with the known pigment substances increased, not only with contents of about 10% coke, but also with polyethylene masses with a content of 5% fine powdery coke and less. Such a relatively small addition of fine powdered coke is for some purposes, z. B. insulating purposes, of polyethylene advantageous. A polyethylene produced by the low-pressure polymerization process was mixed in equal parts with a blast furnace coke, which was passed through a sieve of 10,000 mesh / cm ² , in a Z-kneader and, after subsequent homogenization, on a laboratory roll mill under a 30 t press to form a plate pressed. The plate showed an excellent gloss and the following mechanical values: Method of manufacture of plastically deformable masses made of polyethylene and fine powdered coke Addition to patent application E 12669 IVb / 39 b
(Extension lift 1 065 607)