# US 8,770,666 B2 · Molded urethane foam pad for vehicle seats, vehicle seat, and processes for the production thereof

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- Number: US 8,770,666 B2
- Document ID: US8770666B2
- Status: Granted
- Kind: B2
- Application number: 13/120,014
- Filed: 2009-09-17
- Published: 2011-09-29
- Granted: 2014-07-08
- Earliest claimed: 2008-09-24
- Assignees: Mitsui Chemicals, Inc.; Toyota Jidosha Kabushiki Kaisha; Toyota Boshoku Kabushiki Kaisha
- Applicants: Kazuto Usaka; Koichi Sano; Hideaki Otsuka; Hiroyuki Utsumi; Takashi Inoh; Yoshiyuki Murata; Tsuguyoshi Sakai
- Inventors: Kazuto Usaka; Koichi Sano; Hideaki Otsuka; Hiroyuki Utsumi; Takashi Inoh; Yoshiyuki Murata; Tsuguyoshi Sakai
- Web page: https://patentgrep.com/patent/US8770666B2

## CPC

- C08J 9/0061: {characterized by the use of several polymeric components}
- B60N 2/7017: {characterised by the manufacturing process; manufacturing upholstery or upholstery springs not otherwise provided for}
- C08G 18/4018: {Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48}
- C08G 18/4072: {Mixtures of compounds of group C08G18/63 with other macromolecular compounds}
- C08G 18/4288: {modified by higher fatty oils or their acids or by resin acids}
- C08G 18/48: Polyethers
- C08G 18/632: {onto polyethers}
- C08G 18/7607: {Compounds of C08G18/7614 and of C08G18/7657}
- C08J 9/30: by mixing gases into liquid compositions or plastisols, e.g. frothing with air
- C08G 2110/0008: flexible
- C08G 2110/0058: ≥50 and <150kg/m3
- C08G 2110/0083: prepared using water as the sole blowing agent
- C08G 2350/00: Acoustic or vibration damping material
- C08J 2201/00: Foams characterised by the foaming process
- Y10T 29/481: Method
- 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)
- B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An object of the invention is to provide molded urethane foam pads and vehicle seats that can contribute to the reduction of environmental load and have appropriate impact resilience and hardness and excellent durability with good balance, and also have high comfort. A molded urethane foam pad for vehicle seats including a polyurethane is obtainable by foaming and curing materials including a plant-derived polyol (A), a non-plant-derived polyol (B), water, a catalyst, a foam stabilizer and a polyisocyanate, and has a core density of 55 to 65 kg/m3 as measured in accordance with JIS K6400; the plant-derived polyol (A) is a polyol which is obtained by condensing a polyhydric alcohol of 6 hydroxyl groups with a plant-derived, C15 or higher hydroxycarboxylic acid and which has a hydroxyl value of 45 to 55 mg KOH/g; the non-plant-derived polyol (B) is a polyol having a hydroxyl value of 18 to 26 mg KOH/g, and/or a polymer-dispersed polyol in which fine particles of a polymer of a compound having an unsaturated bond are dispersed in the polyol; and the polyurethane contains a plant-derived molecular structure and the content of the plant-derived molecular structure is 15 to 20 wt % based on 100 wt % of the molded urethane foam pad.

## Claims

### Claim 1

A molded urethane foam pad for vehicle seats comprising a polyurethane, wherein the pad is obtained by foaming and curing materials comprising a plant-derived polyol (A), a non-plant-derived polyol (B), water, a catalyst, a foam stabilizer and a polyisocyanate, and
the pad has a core density of 55 to 65 kg/m3, and further wherein:
the plant-derived polyol (A) is a polyol which is obtained by condensing a polyhydric alcohol of 6 hydroxyl groups with a plant-derived, C15 or higher hydroxycarboxylic acid and which has a hydroxyl value of 45 to 55 mg KOH/g,
the non-plant-derived polyol (B) is a mixture of a polyol having a hydroxyl value of 18 to 26 mg KOH/g, and a polymer-dispersed polyol in which fine particles of a polymer of a compound having an unsaturated bond are dispersed in the polyol having a hydroxyl value of 18 to 26 mg KOH/g,
the polyurethane contains a plant-derived molecular structure,
the content of the plant-derived molecular structure is 15 to 20 wt % based on 100 wt % of the molded urethane foam pad and
the content of a plant-derived component contained in the plant-derived polyol (A) is 14 to 19 wt % based on 100 wt % of the materials.

### Claim 2 (depends on 1)

A vehicle seat comprising the molded urethane foam pad for vehicle seats described in claim 1, and a seat upholstery.