2-cyanoacrylate-based composition, method and agent for evaluating curing thereof

• US 7,279,523 B2
• Filed: 11/04/2003
• Issued: 10/09/2007
• Est. Priority Date: 11/06/2002
• Status: Active Grant

• Current Assignee: Toagosei Company Limited
• Original Assignee: Toagosei Company Limited
• Inventors: Ohashi, Yoshiharu, Ando, Yushi
• Primary Examiner(s): Douyon; Lorna M.
• Assistant Examiner(s): Thomas; Jaison
• Application Number:
  US10/494,329
• Publication Number:
  US 20040254272A1
• Time in Patent Office: 1,435 Days
• Field of Search: 855/2, 858/2, 859/7, 858/7, 859/4, 252/408.1, 526/328, 524/81, 524/555, 524/715, 524/722, 524/761, 558/307
• US Class Current: 524/555
• CPC Class Codes: C08F 2/00 Processes of polymerisation
• CPC Class Codes: C08F 22/32 Alpha-cyano-acrylic acid; Esters thereof
• CPC Class Codes: C08F 222/322 Alpha-cyano-acrylic acid ethyl ester, e.g. ethyl-2-cyanoacrylate
• CPC Class Codes: C09D 4/00 Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
• CPC Class Codes: C09J 4/00 Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16

Abstract

A 2-cyanoacrylate-based composition comprises a coloring material that changes color with curing of 2-cyanoacrylate. The composition has good visibility and excellent workability as it is colored before curing, and changes color with curing as it becomes colorless or light-colored after curing, thereby providing bonded, filled or surface treated portions with good appearance.

Claims

1. A method for determining curing of 2-cyanoacrylates, which consists essentially of blending, with a 2-cyanoacrylate, a coloring material that changes color with curing of the 2-cyanoacrylate, and curing the blend whereby curing is determined by said coloring material changing color, wherein the coloring material is a compound having a property of changing color with a change of pH, wherein the coloring material is selected from methyl yellow, methyl orange, methyl violet, pentamethoxy red and methyl red.

2. A method for determining curing of 2-cyanoacrylates according to claim 1, wherein the coloring material is methyl yellow.

3. A method for determining curing of 2-cyanoacrylates according to claim 1, wherein the coloring material is methyl orange.

4. A method for determining curing of 2-cyanoacrylates according to claim 1, wherein the coloring material is methyl violet.

5. A method for determining curing of 2-cyanoacrylates according to claim 1, wherein the coloring material is pentamethoxy red.

6. A method for determining curing of 2-cyanoacrylates according to claim 1, wherein the coloring material is methyl red.

7. A method for preparing a cured adhesive composition which consists essentially of blending, with a 2-cyanoacrylate, a coloring material that changes color with curing of the 2-cyanoacrylate, and curing the blend whereby curing is determined by said coloring material changing color, wherein the coloring material is a compound having a property of changing color with a change of pH, wherein the coloring material is selected from methyl yellow, methyl orange, methyl violet, pentamethoxy red and methyl red.

8. A method for preparing a cured adhesive composition according to claim 7, wherein the coloring material is methyl yellow.

9. A method for preparing a cured adhesive composition according to claim 7, wherein the coloring material is methyl orange.

10. A method for preparing a cured adhesive composition according to claim 7, wherein the coloring material is methyl violet.

11. A method for preparing a cured adhesive composition according to claim 7, wherein the coloring material is pentamethoxy red.

12. A method for preparing a cured adhesive composition according to claim 7, wherein the coloring material is methyl red.