Process for the production of thermoplastic polymer by introducing thermoplastic polymer into an extruder and adding organic polyisocyanate and chain lengthening agent

• Main Authors: GOYERT; WILHELM, MEISERT; ERNST, QUIRING; BERND, WAGNER; HANS, GRIMM; WOLFGANG, EITEL; ALFRED, NIEDERDELLMANN; GEORG
• Format: Patent
• Language: English
• Published: 14.04.1981
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The instant invention is directed to a process for the modification of a thermoplastic polymer comprising: I. introducing 70 to 98 parts by weight of thermoplastic polymer into an extruder at a first inlet; II. adding to said thermoplastic polymer through a second inlet 2 to 30 parts by weight of the following polyurethane forming components, such that the total parts by weight of the thermoplastic polymer and polyurethane components is 100: (A) organic polyisocyanate; and (B) chain lengthening agent with a molecular weight below 400 containing at least one hydroxyl group and/or amino group; wherein the ratio of isocyanate groups of component (A) to Zerewitinoff active groups of component (B) is in the range of from 0.90:1 to 1.2:1; and III. discharging from the extruder the product of the process.