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Epoxy resin roughening and curing agent

A technology of epoxy resin and curing agent, which is applied in the field of epoxy resin toughening and curing agent, can solve problems such as research on the toughening performance of epoxy resin, improve the scope of use and application value, increase impact strength, and simple preparation method easy effect

Inactive Publication Date: 2006-03-01
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

W.X.Zukas (W.X.Zukas, P.M.Wilson, J.J.Gassner.Polym.Mater.Sci.Eng, 1997, 77:232~233) of the United States was the first to try to introduce PAMAM into the epoxy resin system as a curing agent. He passed TBA and DSC studied the curing behavior of PAMAM and epoxy resin with different generations, and found that the amine groups on the surface of PAMAM can react well with epoxy resin, but the author did not conduct a study on the toughening performance of PAMAM on epoxy resin. Research

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 15g of m-phenylenediamine and 15g of 4,4'-diaminodiphenylmethane (that is, the mass ratio is 1:1), heat them into a liquid state at 140°C and mix them together, stir them well, and then mix them evenly The liquid is placed in a desiccator at room temperature, and after the mixture is cooled to 40°C, it is mixed with 25g of triethylenetetramine, 45g of the fourth-generation polyamide-amine dendrimer (with ethylenediamine as the core, and the outermost end is 32 amine functional groups) and 600g EPON828 are mixed. The curing temperature is 80°C, and it takes about 35 minutes to gel. Measuring the mechanical properties of epoxy resin and comparing the mechanical properties of EPON82 epoxy resin using equivalent m-phenylenediamine alone, the fourth generation polyamide-amine dendrimer (PAMAM) and triethylenetetramine . The four curing agents were cured at 80°C for 8 hours, followed by post-curing at 120°C for 3 hours. The results are shown in Table 1.

[0019] Tabl...

Embodiment 2

[0022] Get 18g m-xylylenediamine and 30 grams of diethylenetriamine, 72g first-generation polyamide-amine dendrimers (with ammonia as the core, three amine functional groups at the outermost end) and 700gE-44 type bis Phenol A epoxy resin mix. It can be cured at room temperature, and the gel time is 1.5 hours. The mechanical properties of the epoxy resin are measured. And compare the mechanical properties of the E-44 epoxy resin using the equivalent amount of diaminodiphenylmethane alone, the first generation polyamide-amine dendrimer (PAMAM) and diethylenetriamine. The four cured products were cured at room temperature for 72 hours, and then post-cured at 120° C. for 3 hours. The results are shown in Table 2.

[0023] Table 2 uses the mechanical property comparison of the E-44 epoxy resin of various curing agents

[0024] Hardener

Embodiment 3

[0026] Get 18g of m-aminobenzylamine and 27g of 4,4'-diaminodiphenylmethane (i.e. mass ratio 4:6), heat them into a liquid state at 100°C respectively and mix them together, fully stir them evenly, and mix them with 6g of tetraethylene Ethylpentamine, 4g diethylenetriamine, 45g sixth-generation polyamide-amine dendrimer (with ethylenediamine as the core, 128 amine functional groups at the outermost end) and 650 grams of E-51 bis Phenol A epoxy resin mix. The system was cured at 100°C, the gel time was 16 minutes, and the mechanical properties of the epoxy resin were measured. And compare the mechanical properties of the E-51 epoxy resin using the equivalent amount of diaminodiphenylmethane alone, the sixth generation polyamide-amine dendrimer (PAMAM) and diethylenetriamine. The four cured products were cured at 100°C for 6 hours, and then post-cured at 120°C for 3 hours. The results are shown in Table 3.

[0027] Table 3 uses the comparison of the mechanical properties of t...

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PUM

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Abstract

The epoxy resin roughening and curing agent consists of tree-shaped polyamide-amine polymer 10-60 wt%, saturated fatty polybasic amine 10-70 wt% and aromatic polybasic amine 10-45 wt% and is prepared through mixing tree-shaped polyamide-amine polymer, saturated fatty polybasic amine and aromatic polybasic amine. The preparation process has low cost. Compared with epoxy resin with saturated fatty polybasic amine and aromatic polybasic amine, the epoxy resin with the said epoxy resin roughening and curing agent has 180 % raised impact toughness, and other important performances maintained. In addition, the epoxy resin roughening and curing agent has wide curing temperature range from room temperature to 120 deg.c and adjustable curing period, and thus makes epoxy resin possess widened application range and raised application value.

Description

technical field [0001] The invention relates to a curing agent, in particular to an epoxy resin toughening curing agent. Background technique [0002] Epoxy resin is a thermosetting resin with excellent adhesion, wear resistance, mechanical properties, electrical insulation properties, chemical stability, high and low temperature resistance, and is widely used in adhesives, electronic instruments, light industry, construction, machinery, aerospace, etc. It is widely used in aviation, coating, bonding and other fields. However, after curing, the epoxy resin has a high crosslinking density and a three-dimensional network structure, which has shortcomings such as large internal stress, brittle texture, poor fatigue resistance, heat resistance, and impact resistance, as well as low peel strength, cracking strain, and heat and humidity resistance. Poor and other shortcomings, to a large extent limit its application in some high-tech fields. Therefore, the toughening and strengt...

Claims

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Application Information

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IPC IPC(8): C08G59/40C08L77/00C08K5/18
Inventor 陈海生王焱吴国飞王先胜
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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