SU1442523A1 - Epoxy composition - Google Patents

Abstract

The invention relates to the preparation of elastic epoxy compositions used for sealing and casting various structures and products used at sub-zero temperatures. The invention makes it possible to increase the tensile strength in the temperature range from +20 to (destructive stress at tensile strength at 20 ° C is 12-21 MPa versus 6.7-7.2 MPa for the known composition, and at 80-85 MPa and 47 MPa, respectively). The result is achieved by using an epoxy composition comprising 100 mash. epoxy blokoligomera and 16,8-21.0 mach. aromatic amine, as an epoxy blococoligomer of the product of the interaction of diglycidyl ether of polyepichlorohydrin and sebacic acid at their molar ratio of 1: (O, 25–0.3), respectively. 3 tab. F (L

Description

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The invention relates to the field of producing elastic epoxy, MCO, m-positions used for sealing and pouring various structures and products operated at sub-zero temperatures.

The chain of the invention is an increase in tensile strength in the temperature range from +20 to-90.C.

Example 1. Getting blocker Homer. A flask was charged with 100 mash of polypichlorohydrin diglycidyl ether (E-181) and 14.7 mash. sebacic acid. The contents of the flask were stirred at 130-140 ° until a block-igocoligomer was obtained with an acid number of not more than 1 kg KOH / g (3-5 hours).

Then the mass is cooled to 50-6 O s and drank into the receiving tank for work. The composition and properties of the synthesized blokol | 1gomerov in examples 1-4 are given in table. one.

Example 5. Obtaining a composition of qing. To 100 ma.ch. The epoxy block coli obtained in Example 1 was added 20.2 parts by weight. 4,4-diaminodiphenylmethane, heated with stirring until melted (70-75 ° C) and obtaining a homogeneous composition, poured into molds and cured according to the mode: at 100 ° C for 3 h, at 120 ° C for 2 h.

The composition and features of the compositions according to examples 5-11 are given in table. 2

Comparative characteristics of the compositions are given in table. 3

Claims (1)

Invention Formula An epoxy composition comprising an epoxy blokoligomer and an aromatic amine, characterized in that, in order to improve tensile strength in the temperature range from -60 ° C, as an epoxy blocigomer it contains the product of diglychd-cyclic polypichlorohydrin ester and sebacic acid at their molar ratio of 1: (O, 25–0.3), respectively, with the following content of the components of the composition, wt.h .: Epoxy Blokoligomer100 Aromatic Amine 16.8-21.0 1100 2100 3 (contra) 100 4 (cont.) 100 Table 1 16.5 14.8 19.6 12.3 0.08 OJ8 0.05 0.28 Example ( 5 6 7 V 9 to eleven Epoxy Block olm-Homer, us, h, by example 1PE From | e | ditel nas.ch. Ano-fécol At 100 100 100 100 100 4,4- -DAM 20.3 17.5 19.4 Mixture 4.4 -; 42о | -30 -DAN and M.-T | Relatives Walke at Rareag, C -50 -90 Table 2 20 -30 -50 -90 60 21 79 80 82 2.2 96 5.9 5.2 4.8 4.1 16-21 5.6-6.7 12 70 69 35 2.1 130 12 10.26.4 3.0 13-18.3 , 9-4.1 15 72 79 80 2.4 FROM 10.5 8.7 5.9 3.6 17-20 4.9-5.8 16.8 too - 100 21.0 19 7782852.5101585.5 5.04.018-216.5-7.0 20 7880862.4995.55.0 4.93.517-20, JJ, 23.5- 30 5052572,4623.43.0 2.83.615-175.5-6.1 13.6- 3.5 1825291,4827,16,8 5,22,11 -162,6-3, APPEARANCE. As hardening of bodies, the following aromatic amines are used: 4,4-d (4,4-DAM), a mixture of 4,4 -DAY and n-toluidine (M-T) in bulk a ratio of 70:30 respectively and ai BUT Table 3 - yes and niodi i ta atnsfepol. The viscosity of an epoxy block coli at. 50 ° C, Pa-s0.08-0.18 1.2-1.7 Destructive stress at stretching at, ° C: + 2012-216.7-7.2 -3070-7948 -5069-8049 -9080-8547 t + 602,1-2,41,2 Elongation at discharge, %, at 20 ° С 96-130 100-108 Adhesion to steel, MPa, at С 2015-21 14-17 603.9-7.0 3.5-4.0 kn Compiled by R. Margolina Editor N, Bobkova Tehred L. Oliinyzh Corrector L, Patay Relatives Walke at Rareag, C Table 2 -90 20 -30 -50 -90 60 21 79 80 82 2.2 96 5.9 5.2 4.8 4.1 16-21 5.6-6.7 12 70 69 35 2.1 130 12 10.26.4 3.0 13-18.3 , 9-4.1 15 72 79 80 2.4 FROM 10.5 8.7 5.9 3.6 17-20 4.9-5.8 -a ai - yes and niodi i ta atnsfepol.