Dispersion stabilizer based on at least two types of polyols and method of preparing the same

Patent metadata

Field	Value
Publication number	US-12570779-B2
Application number	US-202318331593-A
Country	US
Kind code	B2
Filing date	Jun 8, 2023
Priority date	Jul 29, 2022
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

Provided are a polymer polyol dispersion stabilizer, which is prepared by reacting a first polyol having a hydroxyl value (OHV) of 5 to 50 mgKOH/g and an ethylene oxide content of less than 20 wt %, a second polyol having an OHV of 50 to 100 mgKOH/g and an ethylene oxide content of 20 wt % or more, and a reactive unsaturated compound having one or more carbon-carbon double bonds and two or more carbon-oxygen double bonds, and a method of preparing the same.

First claim

What is claimed is:

1 . A polymer polyol dispersion stabilizer, which is prepared by reacting
a first polyol having a hydroxyl value (OHV) of 5 to 50 mgKOH/g and an ethylene oxide content of less than 20 wt %; a second polyol having an OHV of 50 to 100 mgKOH/g and an ethylene oxide content of 20 wt % or more; and a reactive unsaturated compound having one or more carbon-carbon double bonds and two or more carbon-oxygen double bonds.

2 . The polymer polyol dispersion stabilizer of claim 1 , wherein the difference in OHV between the first polyol and the second polyol is 5 mgKOH/g or more.

3 . The polymer polyol dispersion stabilizer of claim 1 , wherein the difference in ethylene oxide content between the first polyol and the second polyol is 10 wt % or more.

4 . The polymer polyol dispersion stabilizer of claim 1 , wherein the reactive unsaturated compound is one or more selected from the group consisting of maleic acid, fumaric acid, maleic anhydride, itaconic acid, citraconic acid, and citraconic anhydride.

5 . The polymer polyol dispersion stabilizer of claim 1 , wherein the stabilizer has a viscosity (at 25° C.) of 2,500 to 7,500 cps.

6 . A polymer polyol, comprising:
the polymer polyol dispersion stabilizer of claim 1 ; a polymer derived from an ethylenically unsaturated monomer; and a base polyol.

7 . The polymer polyol of claim 6 , wherein the ethylenically unsaturated monomer is at least one selected from the group consisting of an aromatic vinyl monomer and a vinyl cyan-based monomer.

8 . The polymer polyol of claim 6 , wherein the content of solid contents is 10 to 70 wt %.

9 . The polymer polyol of claim 6 , wherein the viscosity (at 25° C.) is 500 to 25,000 cps.

10 . A method of preparing a polymer polyol, comprising:
(a) preparing a first mixture by mixing the polymer polyol dispersion stabilizer of claim 1 , an ethylenically unsaturated monomer, an initiator, and a base polyol; (b) preparing a second mixture by mixing a base polyol and a diluent; and (c) adding the first mixture to the second mixture and polymerizing the resulting mixture.

Assignees

• Korea Kumho Petrochemical Co Ltd

Inventors

• Park Jinwoo
• Kim Gi Jung
• Kim Seulgi
• Song Jae Yeong

Classifications

• C08G2110/0008

  flexible · CPC title

• C08J2203/10

  Water or water-releasing compounds · CPC title

• C08J2375/04

  Polyurethanes · CPC title

• C08G2110/0083

  prepared using water as the sole blowing agent · CPC title

• C08G2110/0058

  ≥50 and <150kg/m3 · CPC title