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Amines for Low Emission Epoxy Compositions

A technology of epoxy resin and composition, applied in the field of paint, cladding or brushing material, which can solve the problem of strong odor and whitening effect

Active Publication Date: 2019-08-16
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-additive polyamines generally have a strong odor and cause a stronger blushing effect

Method used

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  • Amines for Low Emission Epoxy Compositions
  • Amines for Low Emission Epoxy Compositions
  • Amines for Low Emission Epoxy Compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0180] Examples are described below, which explain the present invention in more detail. The invention is of course not limited to the described embodiments.

[0181] "AHEW" means amine hydrogen equivalent weight.

[0182] "EEW" means epoxide equivalent weight.

[0183] "Standard climate" means a temperature of 23±1° C. and a relative air humidity of 50±5%. "NK" stands for "Normal Climate".

[0184] Description of measurement method:

[0185] Infrared spectra (FT-IR) were measured in the form of undiluted films on Perkin-Elmer's FT-IR apparatus 1600 equipped with a horizontal ATR-measuring unit with ZnSe-crystals; absorption bands are expressed in wavenumbers (cm -1 ) means (measurement window: 4000-650cm -1 ).

[0186] 1 H-NMR-spectra were measured on a Bruker Ascend 400 spectrometer at 400.14 MHz; chemical shifts δ are expressed in ppm relative to tetramethylsilane (TMS). No distinction is made between true and pseudo-coupling styles.

[0187] Gas chromatography (G...

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Abstract

The present invention relates to the use of amines of formula (I) as curing agents for epoxy resins, curing agents for epoxy resins comprising amines of formula (I) and epoxy resin compositions obtained therefrom, the epoxy The resin composition is particularly useful as a low emission room temperature curing epoxy resin coating with high hardness and surface quality. The amines of formula (I) are low-odor and dilute epoxy resin compositions extremely well. They are obtained in particular by reductive alkylation of 1,2-propylenediamine with aldehydes or ketones.

Description

technical field [0001] The field of the invention is that of amines, curing agents for epoxy resins, epoxy resin compositions and their use, in particular as paints, finishes or renders. Background technique [0002] Epoxy resin compositions suitable for coating purposes should have the lowest possible viscosity so that they can be easily processed at ambient temperature. Furthermore, it should cure as quickly and undisturbed as possible, even under wet and cold conditions, so that a flat surface is formed without clouding, spots or craters. Finally, the cured coating should have high hardness and low brittleness in order to withstand mechanical loads as well as possible. For visually demanding applications such as floor coverings, the coating should also have a high gloss and the lowest possible tendency to yellow under the influence of light. [0003] The curing agents for epoxy resin coatings known in the prior art generally comprise adducts of polyamines with epoxides,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G59/50C08L63/00C09D163/00
CPCC09D163/00C08L63/00C08G59/5033C07C211/27C08G59/245
Inventor E·卡瑟米A·克拉米尔U·斯塔德尔曼U·布尔克哈德特
Owner SIKA TECH AG
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