Abstract: The present invention relates to fiber polymer composite comprising polypropylene fibers and a matrix material, the matrix material being in direct contact with at least some of the fibers, characterized in that the matrix material comprises 50% to 100% by weight based on the whole matrix material of an amorphous propylene-rich poly-alpha-olefin, to a process for producing the fiber polymer composite, and to the use of the fiber polymer composite.

Abstract: A process for preparing a polyethylene wax by polymerization of ethylene in the presence of a Ziegler-Natta catalyst system composed of titanium tetrachloride and dialkylaluminium halide, wherein the polymerization temperature is in the range from 170 to 200° C., the polymerization is carried out essentially in the absence of solvents and the Al/Ti molar ratio is less than 1.6, gives a wax having the following property profile: dropping point of from 115 to 125° C.; penetration number of not more than 1 mm·10?1; viscosity at 150° C. of less than 60 mPas; density of from 0.945 to 0.960 g/cm3 at 23° C.; molar mass of less than 1500 g/mol and crystallinity of more than 70%.

Abstract: A process for preparing a polyethylene wax by polymerization of ethylene in the presence of a Ziegler-Natta catalyst system composed of titanium tetrachloride and dialkylaluminium halide, wherein the polymerization temperature is in the range from 170 to 200° C, the polymerization is carried out essentially in the absence of solvents and the Al/Ti molar ratio is less than 1.6, gives a wax having the following property profile: dropping point of from 115 to 125° C.; penetration number of not more than 1 mm·10?1; viscosity at 150° C. of less than 60 mPas; density of from 0.945 to 0.960 g/cm3 at 23° C.; molar mass of less than 1500 g/mol and crystallinity of more than 70%.

Abstract: The use of a synthetic wax oxidate having a number-average molecular weight in the range from 300 to 1000 g/mol and an acid number in the range from 15 to 60 mg KOH/g as a processing aid for a moulding compound which contains a polar polymer which in at least 60% of the repeating units contains at least one group selected from ester groups, amide group, sulphone groups and imide groups produces a good release effect and also mouldings whose transparency is undiminished by the processing aid.