Patent · US Active

Method for producing alkoxylated phosphoric acid triesters

US8389756B2 · kind B2 · utility

0Cited by

9References

5Claims

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	Jul 29, 2008
Grant date	Mar 5, 2013
Priority date	—
Expiry date	Jan 17, 2029

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.