Expandable coating composition, coated product, and production method for expanded coating film

• US 20030191207A1
• Filed: 03/24/2003
• Published: 10/09/2003
• Est. Priority Date: 04/08/2002
• Status: Active Grant

• Current Assignee: Fujikura Kasei Company Limited
• Original Assignee: Fujikura Kasei Company Limited, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kai, Hiroyuki, Kawazu, Kenji, Dejima, Hiroya
• Granted Patent: US 6,908,951 B2
• Time in Patent Office: Days
• US Class Current: 521/155
• CPC Class Codes: C08G 18/40 High-molecular-weight compounds C08G18/2805 takes precedence
• CPC Class Codes: C08G 2110/0083 prepared using water as the sole blowing agent
• CPC Class Codes: C08G 2150/60 Compositions for foaming; Foamed or intumescent coatings

Abstract

An expandable coating composition, yields a coating film having elasticity, a soft feeling, and strength which are sufficient for an instrument panel of an automobile by simple processes. An expandable coating composition yields an expanded coating film and contains (a) a polyol compound, (b) an isocyanate compound, and (c) water; the (a) polyol compound reacts with a part of the (b) isocyanate compound, thereby yielding polyurethane resin; the remaining (b) isocyanate compound reacts with the (c) water, thereby yielding carbon dioxide; the polyurethane resin has a breaking strength of 5 N/cm² or greater and less than 200 N/cm² in a case in which an elongation percentage thereof is 100% or less; and the polyurethane resin has a breaking strength of 5 N/cm² to 1,500 N/cm² in a case in which an elongation percentage thereof is more than 100%.

Claims

1. An expandable coating composition which can produce an expanded coating film and which contains (a) a polyol compound, (b) an isocyanate compound, and (c) water;

the (a) polyol compound reacts with a part of the (b) isocyanate compound, thereby yielding polyurethane resin;

the remaining (b) isocyanate compound reacts with the (c) water, thereby yielding carbon dioxide;

the polyurethane resin has a breaking strength of 5 N/cm² or greater and less than 200 N/cm² in a case in which an elongation percentage thereof is 100% or less; and

the polyurethane resin has a breaking strength of 5 N/cm² to 1,500 N/cm² in a case in which an elongation percentage thereof is more than 100%.

2. An expandable coating composition according to claim 1, wherein the expandable coating composition contains elastic solid particles.

3. A coated product comprising an expanded coating film obtainable from the expandable coating composition according to claim 1 or 2.

4. A production method for an expanded coating film comprising the steps of:

coating an expandable coating composition containing (a) a polyol compound, (b) an isocyanate compound, and (c) water;

reacting the (a) polyol compound with a part of the (b) isocyanate compound, thereby yielding polyurethane resin, the polyurethane resin has a breaking strength of 5 N/cm² or greater and less than 200 N/cm² in a case in which an elongation percentage thereof is 100% or less and the polyurethane resin has a breaking strength of 5 N/cm² to 1,500 N/cm² in a case in which an elongation percentage thereof is more than 100%;

reacting the remaining (b) isocyanate compound with the (c) water, thereby yielding carbon dioxide.

5. A production method for an expanded coating film according to claim 4, wherein the expandable coating composition contains elastic solid particles.