Felix Schoeller Jr Gmbh & Co. Kg

Felix Schoeller Gmbh & Co. Kg

Felix Schoeller Jr. Papierfabriken Gmbh & Co. Kg

Felix Schoeller Jr. Gmbh Kg

Felix Schoeller Jr. Papierfabrik Gmbh & Co. Kg

Ralf-Burkhard Dethlefs

Wolfram Wysk

Bernd Scholz

Udo Uyting

Elke Miefert

A photographic support material has a back coating comprising a blend of a polypropylene and low density polyethylene.

Photographic support material with polyolefin back coating blend

A method for the production of a photographic coating support material includes a vacuum drying of the synthetic resin and the master batches as well as a storing and transport these products in a closed system with cleaned and dried air.

Method for the production of a coating material for photographic supports

A photographic support material includes a base paper and at least one polyolefin layer arranged on the base paper and containing titanium dioxide, and a methyl substituted chinacridone red pigment in the polyolefin which is a chinolino (2,3-b) acridine-7,14-dione-5,12-dihydro-3,10-dimethyl.

Photographic support material

A premixture composition for the production of water-resistant photographic support material coated with polyolefin resin for light-sensitive materials of polyolefin resin and light-reflecting white pigment comprises a polyolefin resin formed as a copolymer of ethylene and an .alpha.-olefin. A light-reflecting white pigment is intimately mixed with the said polyolefin resin. Hydrocarbon side chains derived of an .alpha.-olefin in the copolymer comprise C.sub.1 to C.sub.16 carbon atoms. The contents of the copolymer of ethylene and .alpha.-olefin in the premixture composition amounts to from about 10 weight-percent to 100 weight-percent of the complete premixture composition. The light-reflecting white pigment is titanium dioxide. The titanium dioxide employed in the mixture has been subjected to a chemical after-treatment.

Pigment-containing premixture of titanium dioxide with olefin polymer

There is described a process for the production of pigment/plastic premixes characterized by homogeneous distribution of pigment in a polymer matrix. The invention is based on the polymerization of olefins carried out by means of a process using Ziegler catalyst. Significantly the polymerization occurs on the surface of the pigment particles, after the prior activation of the pigment particles.

Process for the production of pigment/plastic premixes

A plastic concentrate containing a pigment and/or filler for the production of a polyolefin coating compound for photographic support materials produced by means of a double screw extruder with degassing.

Plastic concentrate for photographic support material coatings

A support material for photographic coatings comprises a paper or film material coated on at least one side with polyolefin resin, and the resin contains a fluorine containing polymer.

Support material for photographic coatings

A water-resistant support material for light-sensitive materials is disclosed, which is coated on one side or two sides with a polyolefin resin. At least the polyolefin resin of the front-side coating is a copolymer of ethylene and a non-ethylene .alpha.-olefin. This copolymer allows to add to the coating mass a high content in light-reflecting white pigment.

Water-resistant support material for light-sensitive materials

A photographic paper support, which carries on both sides a water resistant coating of polyethylene, is disclosed. The polyethylene is a polyethylene of relatively low density of between 0.930 and 0.936 gram per cubic centimeter, which is produced according to high pressure polymerization. In particular, low density polyethylene (LDPE) produced according to the high pressure method with a density of 0.934 gram per cubic centimeter can be employed.

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Bissendorf, Germany

Ralf-Burkhard Dethlefs