Addition compounds suitable as dispersants or anti-sedimentation agents

Patent metadata

Field	Value
Publication number	US-9574044-B2
Application number	US-201514857367-A
Country	US
Kind code	B2
Filing date	Sep 17, 2015
Priority date	Sep 18, 2014
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

An addition compound, prepared by reacting a) one or more polyisocyanates having an average functionality of 2-6; b) one or more compounds comprising at least one chain selected from the group consisting of polyester, polyether, polyacrylate, polyurethane, polyolefin and a combination thereof; and at least one isocyanate reactive group, wherein the at least one isocyanate reactive group is an amino group; and c) one or more compounds selected from the group consisting of N-(3-aminopropyl) imidazole (API), benzoguanamine (BGA) and N-(2-aminoethyl) piperazine (AEP). The addition compound is suitable as dispersant or anti-sedimentation agent, especially for pigments, fillers and matting agents.

First claim

The invention claimed is:

1. An addition compound, prepared by reacting
a) one or more polyisocyanates having an average functionality of 2-6;
b) one or more compounds comprising
at least one chain selected from the group consisting of polyester, polyether, polyacrylate, polyurethane, polyolefin and a combination thereof; and
at least one isocyanate reactive group,
wherein the at least one isocyanate reactive group is an amino group; and

c) one or more compounds selected from the group consisting of N-(3-aminopropyl) imidazole (API), benzoguanamine (BGA) and N-(2-aminoethyl) piperazine (AEP); and
d) one or more compounds comprising at least one isocyanate reactive group and at least one pigment affinity group,
wherein component d) is selected from the group consisting of t-butyl amine, dibutylamine, ethylene cyanohydrin, 2,4,7,9-tetramethyl-5-decin-4,7-diol, phenyl naphthylamine, dimethyl benzidine, p-amino azobenzene, and amino anthraquinone.

2. The addition compound according to claim 1 , wherein component c) is N-(3-aminopropyl) imidazole (API) or benzoguanamine (BGA).

3. The addition compound according to claim 1 , wherein component c) is N-(2-aminoethyl) piperazine (AEP).

4. The addition compound according to claim 1 , wherein component b) is used in an amount of 5-90 equivalent % based on the isocyanate groups of component a).

5. The addition compound according to claim 1 , wherein the chain of component b) is selected from the group consisting of polyetheramines having (C 2 -C 4 ) alkyleneoxy repeating units, polyetheralcohols having (C 2 -C 4 ) alkyleneoxy repeating units and combinations thereof.

6. The addition compound according to claim 1 , wherein the at least one amino group of component b) is in the terminal of a polymer chain.

7. The addition compound according to claim 1 , wherein component a) is selected from the group consisting of i) a mixture of hexamethylene diisocyanate and toluene diisocyanate (HDI/TDI), ii) methylene diphenyl diisocyanate (MDI) and iii) mixtures thereof.

8. A process for preparing the addition compound according to claim 1 , comprising:
reacting component a) with components b), c) and d) sequentially.

9. A dispersant or an anti-sedimentation agent, comprising:
the addition compound according to claim 1 .

10. A pigment, filler or matting agent, comprising:
the dispersant or anti-sedimentation agent according to claim 9 .

11. A pigment, filler or matting agent, comprising:
the addition compound according to claim 1 .

Assignees

• Evonik Degussa Gmbh

Inventors

• Tilak Girish
• Guo Bing
• Cheng Shenglan

Classifications

• C08G18/10 Primary

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• C08G18/285

  Nitrogen containing compounds · CPC title

• C08G18/2815

  Monohydroxy compounds · CPC title

• C08G18/3234

  cycloaliphatic · CPC title

• C08G18/2865

  Compounds having only one primary or secondary amino group; Ammonia · CPC title