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

US4261946A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wilhelm Goyert · Leverkusen, DE
• Ernst Meisert · Leverkusen, DE
• Wolfgang Grimm · Bremen, DE
• Alfred Eitel · Dormagen, DE
• Hans Wagner · Dormagen, DE
• Georg Niederdellmann · Dormagen, DE
• Bernd Quiring · Leverkusen, DE

Key dates

• Filing date: Dec 13, 1979
• Grant date: Apr 14, 1981
• Expiry date: Dec 13, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/0895
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The instant invention is directed to a process for the modification of a thermoplastic polymer comprising: PA1 I. introducing 70 to 98 parts by weight of thermoplastic polymer into an extruder at a first inlet; PA1 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: PA2 (A) organic polyisocyanate; and PA1 (B) chain lengthening agent with a molecular weight below 400 containing at least one hydroxyl group and/or amino group; PA1 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 PA1 III. discharging from the extruder the product of the process.