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Color indicating epoxy resins and methods thereof

A technology for epoxy resin and curing epoxy resin, which is applied in the field of dyes and can solve problems such as difficulty in detecting completeness

Inactive Publication Date: 2013-03-06
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since curable epoxies and hardeners are often similar in color and viscosity, completeness of mixing can be difficult to detect

Method used

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  • Color indicating epoxy resins and methods thereof
  • Color indicating epoxy resins and methods thereof
  • Color indicating epoxy resins and methods thereof

Examples

Experimental program
Comparison scheme
Effect test

example

[0146] Advantages and embodiments of this invention are further illustrated by the following examples, but the particular materials and amounts thereof recited in these examples, as well as other conditions and details, should not be construed to unduly limit this invention. In these examples, all percentages, ratios and ratios are by weight unless otherwise indicated.

[0147] All materials are commercially available, eg, from Sigma-Aldrich Chemical Company; (Milwaukee, WI), or are known to those of skill in the art unless otherwise indicated or apparent.

[0148] Table 1 Materials

[0149]

[0150]

[0151] Preparation of Component A (amine-based curing agent) 20 g of TTD Mix with 10 wt.% (2.0 g) of silica for 2 minutes. Subsequently, the dye is added in fractional steps of 5 mg until a good visual impression of the color can be obtained. After each addition, the mixture was again mixed using the mixer for 1 minute at 3500 rpm.

[0152] Preparation of component B...

example 18

[0164] Example 18: The preparation of Component C listed above was prepared using Dye 10 in an amount of 0.25 wt%. The preparation of Component D listed above was prepared using 0.18 wt% of Dye 8.

example 19

[0165] Example 19: The preparation of Component C listed above was prepared using Dye 13 in an amount of 0.25 wt%. The preparation of Component D listed above was prepared using 0.18 wt% of Dye 8.

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Abstract

Described herein is an epoxy composition comprising: a first component comprising an amine-based curing agent and a first dye, having a first color; and a second component comprising a curable epoxy resin and a second dye, having a second color. Also described herein is a shelf-life-indicating composition comprising: an amine-based curing agent; and a dye selected from (i) a cationic triarylmethane dye, wherein the cationic triarylmethane dye reversibly reacts with a primary amine; (ii) a halochromic dye having a color transition range between 7-12 when measured in an aqueous solution; or (iii) combinations thereof.

Description

technical field [0001] The present invention describes a dye at least in the curing agent of an epoxy resin system. In one embodiment, a shelf-life indicating epoxy curing agent component composition comprising an amine-based curing agent and a dye is described. In another embodiment, a two-part epoxy resin is described comprising: a first part comprising an amine-based curing agent and a first dye; and a second part The second component includes a curable epoxy resin composition and a second dye. Background technique [0002] Commercial two-component epoxy systems are packaged in a two-cartridge system that will dispense the correct amount of curable epoxy resin and epoxy curing agent. The dispensed curable ring resin is then brought into contact with the curing agent through mixing, and the curing agent reacts with the curable epoxy resin, thereby curing. [0003] Proper mixing and curing of the curable epoxy resin with the curing agent is important in order to obtain t...

Claims

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Application Information

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IPC IPC(8): C08G59/50C08J3/00C08L63/00
CPCC08K5/23C08J3/248C08K5/47C08J3/00C08K5/42C08G59/50C08K5/46C08J2363/00C08J2385/02C08L63/00C09J163/00
Inventor 阿德里安·T·容
Owner 3M INNOVATIVE PROPERTIES CO
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