Hoechst Aktiengesellschaft

Ticona Gmbh

Hoecht Ag

Michael Schreck

Andreas Winter

Volker Dolle

Jurgen Rohrmann

Adolf Wilhelm

Hartmut Kondoch

Ursula Murschall

Martin Antberg

Frank Osan

Thomas Dries

Michael Ahlers

Herbert Peiffer

Walter Spaleck

Gunter Schloegl

Dieter Scheidecker

Rudolf Mauer

Klaus Thoeren

An oriented film composed of thermoplastic polymers is described which comprises at least one vacuole-containing layer. The vacuole-containing layer comprises particulate hollow bodies which are essentially composed of a polymer which is incompatible with the thermoplastic polymer. A process for producing the film is also described.

Oriented film composed of thermoplastic polymer with particulate hollow

Sealable multilayer polyolefin film containing hollow particles, process for its production and its use An oriented polyolefin film is described. It contains at least one polyolefinic base layer and one polyolefinic sealable top layer. The top layer contains hollow particles which comprise essentially a polymer which is incompatible with the polyolefin of the top layer. A process for the production of the film and its use are also described.

Sealable multilayer polyolefin film containing hollow particles process

This invention provides a polyolefinic multilayer film which has a base layer containing polypropylene and at least one outer layer. The outer layer contains at least 50% by weight of a propylene/butylene resin composition. The propylene/butylene resin composition has a low degree of crystallinity and is modified by a surface treatment, e.g. corona treatment. The surface treatment raises the minimum heat-sealing temperature to the range of 85.degree. to 110.degree. C. and unexpectedly reduces the film's tendency to block. The resulting multilayer film is useful in packaging.

Low temperature heat sealable biaxially oriented polypropylene films

Heat-sealable, white-opaque, biaxially oriented, multilayer polypropylene film, process for the production thereof, and the use thereof. The invention relates to a heat-sealable, white-opaque, biaxially oriented, multilayer polypropylene film comprising a core layer and at least one interlayer arranged there.

Heat-sealable, white-opaque, biaxially oriented, multi-layer

The invention relates to a peelable, oriented, opaque, multilayer polyolefin film comprising at least one opaque layer and a peelable top layer. All layers of the film are essentially vacuole-free. The opaque layer contains pigments having a mean particle diameter of from 0.01 to 1 .mu.m.

Peelable, heat-sealable, multilayer polyolefinic film, process for the

Process for the preparation of a polypropylene molding composition A propylene block copolymer having good flow properties and a very good low temperature impact strength is obtained in a high yield if a catalyst which consists of a chiral metallocene, containing a bridge, of the formula I ##STR1## and an aluminoxane is used for the polymerization of propylene and the comonomers. The polymerization is carried out in two stages, a crystalline propylene polymer being prepared in the first stage.

Process for the preparation of a polypropylene molding composition

The disclosed oriented, multilayer olefin polymer film comprises a polyolefinic base layer and at least one heat-sealable or non-heat-sealable top layer. The top layer contains at least one olefin polymer and at least one amorphous polymer which is in the olefin polymer in the form of separated or discrete, substantially non-agglomerated particles. The discrete, substantially non-agglomerated particles form during the coextrusion process for the production of the multilayer film. The film is useful for printing, lamination, and packaging.

Heat-sealable or non-heat-sealable, oriented, layered olefin polymer

A propylene block copolymer having good flow properties and a very good low temperature impact strength is obtained in a high yield if a catalyst which consists of a chiral metallocene, containing a bridge, of the formula I ##STR1## and an aluminoxane is used for the polymerization of propylene and the comonomers. The polymerization is carried out in two stages, a crystalline propylene polymer being prepared in the first stage.

A propylene block copolymer having good flow properties and a very good low temperature impact strength is obtained in a high yield if a catalyst which consists of a chiral metallocene, containing a bridge, of the formula I ##STR1## and an aluminoxane is used for the polymerization of propylene and the comonomers. The polymerization is carried out in two stages, a crystalline propylene polymer in liquid monomers being prepared in the first stage and a copolymer in the gas phase being prepared in the second stage.

In the process according to the invention for the preparation of a polypropylene, a catalyst system is used which is based on the product of the reaction of a magnesium halide with an electron donor and a tetravalent titanium compound, a halogen-free organoaluminum compound and two different organosilicon compounds as stereo-regulator. Propylene homopolymers and copolymers having a very narrow molecular weight distribution and high isotacticity are obtained in high yields. The polymers are suitable, in particular, for injection molding.

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Frankfurt-am-Main, Germany

Michael Schreck