Patent · US Active

Method for producing alkoxylated phosphoric acid triesters

US8841475B2 · kind B2 · utility

0Cited by

10References

8Claims

0Family size

Assignee

Clariant Finance (BVI) Limited · VG

Inventors

Peter Klug · Großostheim, DE
Franz-Xaver Scherl · Altötting, DE
Waltraud Simsch · Kelkheim, DE
Adelgunde Oberhauser · Tönning, DE

Key dates

Filing date	Feb 5, 2013
Grant date	Sep 23, 2014
Priority date	—
Expiry date	Feb 5, 2033

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K2800/48
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The invention relates to a method for producing phosphoric acid triesters of formula (I). According to said method, phosphoric acid or a phosphoric acid derivative selected from orthophosphoric acid, tetraphosphoric decaoxide and polyphosphoric acid is reacted with alkoxylated alcohols of formulae (II) R1—(OA1)x—OH, (III) R2—(OA2)y—OH, and (IV) R3—(OA3)z—OH, in the molar ratio phosphoric acid or phosphoric acid derivative to alkoxylated alcohol of 1:2.5 to 1:3.3, at between 200 and 240° C.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.