Manganese-bearing polymer complexes

Patent metadata

Field	Value
Publication number	US-12545805-B2
Application number	US-202218146659-A
Country	US
Kind code	B2
Filing date	Dec 27, 2022
Priority date	Jun 20, 2019
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

A composition for use as a drier in auto-oxidizable coatings or as an accelerator in unsaturated polyester resins comprises a manganese-bearing polymer having a manganese dicarboxylate repeating unit and at least one nitrogen-containing donor ligand. Such compositions offer excellent drying performances. They ensure a strongly reduced leachability of manganese compared to that of known manganese-bearing driers.

First claim

The invention claimed is:

1 . Composition for use as drier in auto-oxidizable coatings or as accelerator in unsaturated polyester resins, comprising:
a manganese-bearing polymer having a repeating unit according to:

wherein X is one or more groups from the list comprising a urethane and a polyurethane;
wherein n≥2; and,
at least one donor ligand from the list comprising bidentate, tridentate, pentadentate, and hexadentate nitrogen ligands comprising at least two chelating nitrogen atoms.

2 . A composition according to claim 1 , wherein the donor ligand is one or more of:

3 . A composition according to claim 1 , wherein the molar ratio of ligand to manganese is at least 0.005.

4 . A composition according to claim 3 , wherein the molar ratio of ligand to manganese is between 0.2 and 10.

5 . A composition according to claim 1 , wherein group X is a urethane or polyurethane according to:

with m≥1 and, wherein each R is one or more group from the list comprising:
alkyl, alkenyl, and alkynyl, comprising 1-40 C;
cycloalkyl, cycloalkenyl, and cycloalkynyl, comprising 5-40 C; and,
aryl, comprising 6-40 C.

6 . A composition according to claim 1 , having a manganese content of at least 0.1%.

7 . A composition according to claim 1 , further comprising one or more solvents selected from the list comprising white spirits, glycol ethers, alcohols, esters, aromatics, and mixtures thereof.

8 . A coating composition comprising a drier composition according to claim 1 in an amount selected so as to contain 0.0005% to 0.05% of manganese.

9 . An auto-oxidizable coating comprising the composition according to claim 1 as a drier.

10 . An unsaturated polyester resin comprising the composition according to claim 1 as accelerator.

Assignees

• Umicore Nv

Inventors

• Vercaemst Carl

Classifications

• C09D177/00

  Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain (based on polyhydrazides C09D179/06; based on polyamide-imides C09D179/08); Coating compositions based on derivatives of such polymers · CPC title

• C09D175/04

  Polyurethanes · CPC title

• C08G69/42

  Polyamides containing atoms other than carbon, hydrogen, oxygen, and nitrogen (C08G69/12, C08G69/32 take precedence) · CPC title

• C08G63/681 Primary

  containing elements not provided for by groups C08G63/682 - C08G63/698 · CPC title

• C08G18/7621

  being toluene diisocyanate including isomer mixtures · CPC title