Defoamer composition based on organofunctionally modified polybutadienes

Patent metadata

Field	Value
Publication number	US-12466906-B2
Application number	US-202217664986-A
Country	US
Kind code	B2
Filing date	May 25, 2022
Priority date	May 27, 2021
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A defoamer composition contains a compound based on polybutadiene having at least one repeat unit selected from the divalent radicals:

First claim

The invention claimed is:

1 . A defoamer composition, comprising:
a compound based on polybutadiene having at least one repeat unit selected from the group consisting of divalent radicals

wherein
A is in each case independently a monovalent organic radical;
B is in each case independently a radical of the formula (4a)

R 1 is in each case independently a monovalent hydrocarbon radical having 1 to 16 carbon atoms;
R 2 is a radical of the formula ˜CH 2 —O—R 3 ;
R 3 is in each case independently a monovalent hydrocarbon radical having 3 to 18 carbon atoms;
R 4 is in each case independently a monovalent organic radical having 1 to 18 carbon atoms or hydrogen;
m, n, o, p and q are each independently 0 to 300, with the proviso that a sum total of m, n, o, p and q is greater than 1; and
wherein the B radical has at least one repeat unit in accordance with

including every permutation of repeat units in B.

2 . The composition according to claim 1 , wherein m, n, o, p and q are each independently 0 to 200, with the proviso that the sum total of m, n, o, p and q is greater than 1.

3 . The composition according to claim 1 , wherein a number-average molar mass M n of the polybutadiene is from 200 g/mol to 20,000 g/mol.

4 . The composition according to claim 1 , wherein the polybutadiene has 0% to 80% of double bonds present as 1,2 vinyl double bonds, and 20% to 100% of the double bonds present as 1,4 double bonds, wherein the percentages are based on the total number of double bonds in the polybutadiene.

5 . The composition according to claim 1 , wherein the compound is based on linear polybutadienes.

6 . The composition according to claim 1 , wherein the compound has no pendant (in comb position) polybutadienes.

7 . The composition according to claim 1 , wherein the compound has exclusively pendant (in comb position) repeat units (U), (V), and/or (W).

8 . The composition according to claim 1 , wherein an average molar mass of B is from 40 g/mol to 20,000 g/mol.

9 . The composition according to claim 1 , wherein the composition comprises the compound in an amount of 2 to 100% by weight, based on a total weight of the composition.

10 . The composition according to claim 1 , wherein the composition comprises at least one emulsifier.

11 . The composition according to claim 1 , wherein the composition has a viscosity, measured in a 5% aqueous solution at 20° C. to DIN 53015, of 50-5,000 mPa s.

12 . The composition according to claim 1 , wherein the composition comprises at least one thickener.

13 . The composition according to claim 1 , wherein the composition comprises at least one solid.

14 . An additive, comprising the composition according to claim 1 , wherein the additive is a defoamer additive, a flow control additive, and/or a substrate wetting additive.

15 . A method, comprising:
mixing the composition according to claim 1 into a further composition, wherein the further composition is one selected from the group consisting of a dispersion, a millbase, a paint, a coating, a printing ink, an inkjet, a grind resin, a pigment concentrate, a colour preparation, a pigment preparation, a filler preparation, and a coating composition.

16 . A method of defoaming, comprising:
adding the composition according to claim 1 into a further composition.

17 . The composition according to claim 1 , wherein B is in each case independently a radical of the formula (4b)

18 . The composition according to claim 1 , wherein B is in each case independently a radical of the formula (4c)

19 . The composition according to claim 12 , wherein the at least one thickener is at least one selected from the group consisting of an associative thickener, a hydrophobically modified polyacrylate (HASE), a hydrophobically modified cellulose ether (HMHEC), a hydrophobically modified polyacrylamide (HMPAM), a hydrophobically modified polyether (HMPE), an associative polyurethane thickener, a modified cellulose, an organic polymer, a polyvinyl alcohol, a polyacrylic acid, a polymethacrylic acid, a polyacrylamide, polyvinylpyrrolidone, a polyethylene glycol, a natural thickener or a chemically modified type thereof, a starch, gelatin, casein, konjac flour, an organic thickener, a metal soap, a hardened castor oil or an alkoxylate thereof, a chemically modified fat derivative, an inorganic compound, a sheet silicate (bentonite, hectorite), and a (hydrated) SiO2 particle or a modified type thereof.

20 . The composition according to claim 13 , wherein the at least one solid is at least one selected from the group consisting of silica in a modified or unmodified form, a (alkaline earth) alkali metal soap, calcium stearate, and a mixture thereof.

21 . The composition according to claim 1 , wherein the polybutadiene is essentially free of epoxy groups.

Assignees

• Evonik Operations Gmbh

Inventors

• Favresse Philippe
• Schulz Alexander
• Fiedel Michael
• Otto Sarah
• Schubert Frank
• Schierle Thorsten
• Semmler Heike
• Stüttgen Andreas

Classifications

• C09D11/106

  containing macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds · CPC title

• C08F2810/00

  Chemical modification of a polymer · CPC title

• C08C19/06

  Epoxidation · CPC title

• C08G65/2609

  containing aliphatic hydroxyl groups · CPC title

• C08G59/027

  obtained by epoxidation of unsaturated precursor, e.g. polymer or monomer · CPC title