SU602517A1 - Epoxy composition - Google Patents

Description

one

The invention relates to cold cured epoxy compositions and can be used in the engineering plastics industry, in particular, in the manufacture of large-sized fiberglass products by the contact method.

A known composition containing compounds of the general formula R-KH-R-J, where H is aryl radical, aK is aryl aralkylene, alkylene radical, which has high tensile strength. But this epoxy composition cures at elevated temperatures, has a high viscosity and insufficient processing viability.

Cold-cured eloxides containing amine are known; hardener, for example, xylylenediamine in stoichiometric amounts 2.

The disadvantage of this composition is its insufficient workability due to its low viability and low strength properties due to lower values of tensile strength (700-755 kg / CQ.

The application of heat treatment to these compositions does not allow to achieve high physicomechanical properties.

A cold-cured epoxy composition is also known, which is as amine. hardener contains diethylenetriamine 2

However, this composition is also characterized by insufficient processability due to low viability (20-25 minutes) and low strength properties (for example, tensile strength at stretching 690-800 kg / cm) 2l.

The aim of the invention is to improve the manufacturability by increasing the viability during processing, which is very important for the contact method of manufacturing large-sized products, as well as the development of physical and mechanical parameters, such as tensile strength.

Claims (2)

This 11el is achieved by the fact that the epoxy composition contains, as an amine hardener, a mixture of aminobenzylaniline, metaxylylenediamine and n-xylyleneannamin in co-drying (5-95) :( 1-66) :( 4-29). At the same time, the composition of sobolh-, ve Eprksld and resins on the part 61,2-72 Amine hole -. About 2828 -38.8-Aminobenzilaniline is a condensation product of aniline with fsfmaldehyde in the presence of betonite clay and has the following tav, wt.% :. t-Amnnobenzilanilin 70 4,4-Diaminodiphenylmethane 20 4,4-Diamino-2 (methyl-P-aminophenyl) diphenylmethane. Example. In a reactor equipped with a stirrer, technical aminobenzylaniline is loaded in a ratio of 88: 8: 4. . Thus prepared, the complex hardener is introduced into the triglycid ether of 4-aminophenol. The composition comprises the following components, Bec.% T Epoxy resins per part, 67.26. Hardener complex 32,74. The epoxy composition is stirred for 10 minutes, poured into metal molds and cured at a continuous temperature for. 20 minutes. Example 2. Carry out example 1, but at the next ratio to shoients, wt.%: Epoxy resins per part 61.2 Complete implant 1 38.8 P n e rp. Anatomically, Example 1 is carried out, but the weight ratio of technical aminobenzyl aniline, m-xylylenediamine, n-x lenddaamine in the complex will cure:; 0 stops 1: 6:66:29 respectively Example 4, Carry out analogously to example 1, but weight The combination of technological aminobenzy anil oaa, M-xylleshhigishna and p-x lendiaiina. in the cold complex, the cure is 95: 1: 4, respectively. Example 5: Carried out analogously to Example 1, but the weight ratio of the technical .aminobenzpaniline, ethexylylene amine, n: xylenediamine to the complexion hardener is 25–45: 30, respectively. Example Carried out analogously to example 1, but with the following ratio of components, wt.%: Epoxy resins per part 75 Complex hardener. 28 Example 7. Carried out analogously to example 1, but a complex hardener in an amount of 32.74% by weight is mixed with 67.26% by weight of resorcinol diglycid ether. Example 8. Carried out analogously to Example 1, but in an amount of 32.74% by weight, a complex of hardeners is mixed with 67.26% by weight of phthalic acid diglycidic acid. EXAMPLE 9 The procedure is carried out analogously to Example 8, but diphenylolpropane diglycid ether (bisphenoy A) is taken as the resin resin. I'll try it on. Carry out the analogous ratio of technical aminobenzilaniline, M-xylylenediamine, p -xyxylenylamine in a complex hardener, similar to example 1, Ir, to a complex hardener of 50:25:25, respectively. Comparison with the well-known in the table. Using the proposed mixture of amines I as a hardener allows to obtain cold-cured epoxy compositions with good processability and high physical and mechanical properties. The proposed hardener allows for both cold curing and polyfunctional resins (triglycidic ester of 1G-aminophenol), which provide the best strength properties known, but which cannot be used with all known hardening hardeners (for example, aliphatic amines due to extreme mechanical 3-5 minutes of viability Formula Epoxy composition of cold heat, containing epoxy resin amine hardener about t and ch and c and with t "l that, with the aim of increasing Fie iko-mechanical indicators and improved processability, as an amine hardener, the composition contains a mixture of aminobenzylaniline, M-xylylenediamine and y-xylylenediamine in a ratio of (5-95); (1-bb): () - with the following ratio of components, h & s. %:, Epoxy resin 61.2-72 Amine hardener 28 -38.8 Sources of information taken into account during the examination: 1. England patent 1279525, с 3 В, 1969. 2. Lee X ,, Neville K. Reference guide to epoxy resins, Energie, M., 1973, p. 92-100,