Polymer additive and a method for the production thereof

US10745353B2 · kind B2 · utility

Assignee

• Clariant Plastics & Coatings Ltd · CH

Inventors

• Mike Sahl · Bad Camberg, DE
• Eduard Zeisberger · Gräfenberg, DE
• Matthias Zaeh · Gersthofen, DE
• Ottmar Schacker · Gersthofen, DE
• Pascal Steffanut · Village-Neuf, FR

Key dates

• Filing date: May 31, 2016
• Grant date: Aug 18, 2020
• Expiry date: Jul 14, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N23/20075
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a compound of formula (I), characterised by the characteristic signals in the X-ray diffraction powder pattern measured with Cu Kalpha radiation (0.154 nm) at a 2-theta angle of 15.0 and 22.7 with a high intensity, and of 5.0, 11.3, 18.9, 20.8, 21.6 and 23.6 with a medium intensity, as well as to a method for producing the compound of formula (I) by reacting at least one isophthalic acid diester of formula (II) where R1 and R2 are the same or different and stand for an aliphatic group, with two equivalents 4-amino-2,2,6,6-tetramethylpiperidine, in the presence of at least one catalyst from the group of metal alcoholates and at a reaction temperature of between 50 and 150° C.