# US 2020/0399417 A1 · Method for producing polyurethane foam

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- Number: US 2020/0399417 A1
- Document ID: US20200399417A1
- Status: Published application
- Kind: A1
- Application number: 16/771,915
- Filed: 2018-12-14
- Published: 2020-12-24
- Earliest claimed: 2017-12-15
- Assignees: Inoac Corporation
- Applicants: Inoac Corporation
- Inventors: Masahito KOIDE; Yosuke OKADA; Tadashi YANO
- Web page: https://patentgrep.com/patent/US20200399417A1

## CPC

- C08G 18/14: {Manufacture of cellular products}
- C08G 18/4829: {Polyethers containing at least three hydroxy groups (C08G18/4833 - C08G18/5096 take precedence)}
- C08G 18/00: Polymeric products of isocyanates or isothiocyanates
- C08G 18/165: {covered by C08G18/18 and C08G18/24}
- C08G 18/2063: {having two nitrogen atoms in the condensed ring system}
- C08G 18/244: {tin salts of carboxylic acids}
- C08G 18/4833: {Polyethers containing oxyethylene units}
- C08G 18/6225: {Polymers of esters of acrylic or methacrylic acid}
- C08G 18/7621: {being toluene diisocyanate including isomer mixtures}
- C08J 9/08: developing carbon dioxide
- C08J 9/145: {only chlorine as halogen atoms}
- C08K 3/26: Carbonates; Bicarbonates
- C08K 5/092: Polycarboxylic acids
- C08G 2110/0008: flexible
- C08G 2110/005: < 50kg/m3
- C08G 2110/0083: prepared using water as the sole blowing agent
- C08J 2203/02: CO2-releasing, e.g. NaHCO3 and citric acid
- C08J 2203/14: Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J 2203/184: of chemical foaming agent and physical blowing agent, e.g. azodicarbonamide and fluorocarbon
- C08J 2375/04: Polyurethanes
- C08K 2003/262: {Alkali metal carbonates}
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

A method for producing a polyurethane foam includes mixing and reacting a polyurethane foam raw material containing a polyol, an isocyanate, a foaming agent, and a catalyst, wherein the polyurethane foam raw material contains sodium bicarbonate and an organic solid acid such as citric acid or malic acid.

## Claims

### Claim 1

A method for producing a polyurethane foam, comprising: mixing and reacting a polyurethane foam raw material containing a polyol, an isocyanate, a foaming agent, and a catalyst, wherein
the polyurethane foam raw material contains sodium bicarbonate and an organic solid acid.

### Claim 2 (depends on 1)

The method for producing a polyurethane foam according to claim 1, wherein the organic solid acid has a melting point of 40° C. to 190° C.

### Claim 3 (depends on 1)

The method for producing a polyurethane foam according to claim 1, wherein the organic solid acid is citric acid.

### Claim 4 (depends on 3)

The method for producing a polyurethane foam according to claim 3, wherein an addition amount of the sodium bicarbonate is 3 to 50 times an addition amount of the citric acid in a weight ratio.

### Claim 5 (depends on 3)

The method for producing a polyurethane foam according to claim 3, wherein the addition amount of the sodium bicarbonate is 0.4 to 15 parts by weight and the addition amount of the citric acid is 0.1 to 0.8 part by weight, based on 100 parts by weight of the polyol.

### Claim 6 (depends on 1)

The method for producing a polyurethane foam according to claim 1, wherein the organic solid acid is malic acid.

### Claim 7 (depends on 6)

The method for producing a polyurethane foam according to claim 6, wherein an addition amount of the sodium bicarbonate is 2 to 50 times an addition amount of the malic acid in a weight ratio.

### Claim 8 (depends on 6)

The method for producing a polyurethane foam according to claim 6, wherein the addition amount of the sodium bicarbonate is 0.4 to 15 parts by weight and the addition amount of the malic acid is 0.1 to 1.0 part by weight, based on 100 parts by weight of the polyol.