USE OF THERMOPLASTIC POLYURETHANES CONTAINING PLASTICIZERS FOR THE MANUFACTURE OF FOILS AND MOULDED ARTICLES

• Main Authors: ROMBRECHT, HANS MALTE, ZEITLER, GERHARD, BITTNER, GERHARD, FAEHNDRICH, KNUD
• Format: Patent
• Language: English; German
• Published: 26.06.1991
• Edition: 5
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING-UP

1. The use of flexible, elastomeric, thermoplastic types of polyurethane having a Shore A hardness from 60 to 80 and containing from 99 to 50 parts by weight of a thermoplastic polyurethane having a Shore A hardness from 95 to 80, a primary melt peak of the rigid segments from 210 to 220 degrees C, as determined by differential scanning calorimetry, and a melt viscosity corresponding to a melt flow index at 190 degrees C and load weight of 212 N of from 0.1 to 200, prepared by reaction of a) organic diisocyantes, b) substantially difunctional polyhydroxy compounds having molecular weights from 500 to 8,000 and c) chain extenders having molecular weights from 60 to 400 in the presence of d) catalysts and e) optionally auxiliary and/or additives and from 1 to 50 parts by weight of a plasticizer from the group consisting of di(methoxyethyl) phthalate, tricresyl, phosphate and/or diphenyl cresyl phosphate for producing sheets and molded parts.