Patent · US Active

Process for making an oxymethylene polymer

US11787892B2 · kind B2 · utility

0Cited by

3References

9Claims

0Family size

Assignees

BASF SE
KOLON PLASTICS, INC. · KR

Inventors

Thomas Heitz · Ludwigshafen am Rhein, DE
Minlu Zhang · Ludwigshafen am Rhein, DE
Achim Stammer · Freinsheim, DE
JongMoon Kim · Busan, KR
In Gi Cho · Pyeonghwa-dong, KR
Jin-Sang Choi · Gimcheon-si, KR

Key dates

Filing date	Jan 9, 2018
Grant date	Oct 17, 2023
Priority date	—
Expiry date	Jan 10, 2041

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G2/06
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for making an oxymethylene polymer comprising polymerizing at least one compound capable of forming —CH2O— repeat units (monomer) in the presence of at least one ester of the general formula I (ester): R1—CO—O—R2 (I) wherein R1 can be hydrogen, wherein R1 and R2 are independently of each other linear or branched C1 to C10 alkyl C5 to C7 cycloalkyl —[R3-0-]nR4 wherein R3 is a linear or branched C2 to C5 alkylen and R4 is a linear of branched C1 to C5 alkyl and n is an integer of from 1 to 5. and in the presence of at least one Lewis acid.

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