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Hardeners for cold-curing epoxy systems

A technology of epoxide and hardener composition, applied in epoxy resin glue, epoxy resin coating, adhesive and other directions, can solve problems such as impossible

Inactive Publication Date: 2016-04-13
BLUE CUBE IP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of high addition hardeners (highly loaded hardeners with LER), it may be difficult or even impossible to adduct only the first or second amine

Method used

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  • Hardeners for cold-curing epoxy systems
  • Hardeners for cold-curing epoxy systems
  • Hardeners for cold-curing epoxy systems

Examples

Experimental program
Comparison scheme
Effect test

example

[0038] Preparation of IPDA adducts

[0039] 1 gram of a mixture of IPDA and D.E.R.331 (6 mol:1 mol) was prepared at room temperature and transferred via droplets into a DSC crucible, heated to 90°C and the heat flux measured. After 35 minutes, the reaction was considered complete.

[0040] On a larger scale, the amine is placed in a flask with a heating mantle and stirrer and heated. Add liquid epoxy resin (LER) from above, at a rate chosen to maintain temperature. If necessary, the flask was allowed to cool by removing the heating mantle. After the addition, the subsequent reaction was carried out at the reaction temperature for at least 35 minutes.

[0041] Preparation of MXDA adducts

[0042] 1 gram of a mixture of MXDA and D.E.R. 331 (4 mol:1 mol) was prepared at room temperature and the droplet was transferred into a DSC crucible, heated to 80°C and the heat flux was measured. After 25 minutes, the reaction was considered complete.

[0043]On a larger scale, the...

example 1

[0048] For Inventive Example 1: Benzyl alcohol was fed into the reactor, which was then heated. When the reactor temperature reached 40° C., MXDA, MXDA-adduct and IPD-adduct were fed in and the mixture was homogenized for 30 minutes and drained. Among hardeners, there are adduct types A1-LER-A1, A2-LER-A2.

[0049] Hardener with D.E.R. TM 3531 (a dilute epoxy resin, which is a blend of bisphenol A epoxy resin and bisphenol F epoxy resin, with C12 / C14 alcohol glycidyl ether as a reactive diluent) with an epoxy equivalent ratio of 1 The amine equivalents were mixed at room temperature to produce a curable composition.

[0050] 2 mm films were cast after 2 minutes of manual homogenization of resin / hardener.

[0051] A 200 μm film was coated on glass using an applicator frame.

[0052] Hardening conditions can be found in the corresponding table.

[0053] Table 1. Hardener Ingredients

[0054]

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Abstract

A process comprising: a) producing a first adduct comprising a reaction product of a difunctional epoxy and Isophrondiamine (IPDA); b) producing a second adduct comprising a reaction product of a difunctional epoxy and m-Xylylenediamine (MXDA) and c) contacting i) the first adduct; ii) the second adduct; iii) an accelerator; and iv) a modifier to form a hardener composition, is disclosed. The hardener composition can be used with an epoxy compound to form a curable composition.

Description

[0001] References to related applications [0002] This application claims the benefit of US Provisional Application No. 61 / 824,411, filed May 17, 2013. technical field [0003] This invention relates to cold cure epoxy systems. More specifically, the present invention relates to hardeners for cold cure epoxy systems. Background technique [0004] Cold curing epoxy systems are suitable for a wide range of industrial applications such as floor coverings, mortars, adhesives, coatings, varnishes and paints. Most cold cure epoxy systems contain amine hardeners. [0005] Typically, amine hardeners are produced as follows: a mixture of amines (A1 and A2) together with solvent and accelerator is homogenized and heated to the appropriate reaction temperature. A difunctional liquid epoxy resin (LER) is then added to form an adduct. Three types of adducts are formed by this method: A1-LER-A1, A2-LER-A2 and A1-LER-A2. It is not desirable to have mixed adducts A1-LER-A2 as they ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/18C08G59/56
CPCC08G59/184C08G59/5026C08G59/5033C08G59/68C09D163/00C08L63/00C08L2205/025C09J163/00
Inventor M·施罗兹E-M·米卡斯基M·法赫尔M·M·格拉斯C·弗里茨切
Owner BLUE CUBE IP