SU1595869A1 - Sealing composition - Google Patents

Abstract

The invention relates to compositions based on modified epoxy resins cured at ambient temperature with amine hardeners, and can be used for sealing and gluing various products and structures. The invention allows to increase strength, elasticity, adhesion and dielectric indices, increase viability and reduce shrinkage due to use in the composition, including, in parts by weight: blokoligomer epoxy resin Dianova with oligoethylene glycolsebacate 100 and aryl aliphatic hardener 7.0-11.2, as a hardener of a mixture of 1-phenyl-3-diethylenetriaminoethyl urea and triethylene tetramine in a weight ratio of 70-80: 20-30. 3 tab.

Description

The invention relates to compositions based on modified epoxy resins that are curable at the ambient temperature with amine curing agents, and can be used to seal and glue various products and structures.

The aim of the invention is to increase the strength and elasticity, adhesion and dielectric performance at room and elevated temperatures, increase vitality and reduce shrinkage.

The hardener is obtained by condensing fensh urea with a corresponding excess amount of triethylene tetramine (TETA), ensuring in the finished hardener the indicated ratio of the components included in it.

PRI me R 1. Synthesis of the amine terminus A containing 70 m.ch. 1-phenyl-3-diethylentriaminoethyl ureas (component I) and 30 May. TETA (II component).

A three-necked flask with a capacity of 0.5 l, equipped with a mechanical stirrer, a condenser and a thermometer, was charged with 136 g (1 mol) of phenylurea and 266 g (1.82 mol) of TETA. The mixture is heated to 120-125 0, held under stirring until 17 g (1 mol) of ammonia are released. After that, the reaction mass is cooled to and | drained. Obtain 382 g (99.2% of the following

with

ate

00

05

with

theoretical) resinous yellow product, characteristic of the state - indicators, prvvedenden our table. one.

Under similar conditions, from 136 g of phenylurea and 240 g (1.64 mol) of lura 2Т6.5 g (1.48 mol) of triethylenetramine, 355.4 g (99.0% of the theoretical) or 333 g (99, , 3% of theoretical) hardeners B and C, which are mixtures of 1-fesh-3-diethylenetriaminoethylurea and TETA with their mass ratio equal to 75:25 and 80:20, respectively.

Hardeners are characterized by the indicators given in table. one.

The composition is prepared by mixing the components at a temperature of (5 + 35) C.

Examples of the composition, MAED. Are presented in table. 2

Claims (1)

In tab. 3 shows the properties of the composition in comparison with the known. Invention Formula Sealing composition comprising an oligo-ethylene glycol-self-epoxy-blocking resin bloc. cinate and aryl aliphatic amine 0 hardener five 20 different with By the fact that, in order to increase strength, elasticity, adhesion and dielectric properties at room and elevated temperatures, increase viability and reduce shrinkage, it contains a mixture of α-phenyl-3-diethyl triaminoethyl urea and triztilentetramine in a weight ratio of 70-80 as a hardener. : 20-30 with the following ratio of components ma.ch .: Blokoligomer 100 Otoverdtel 7.0-11.2  The total free TETA value is determined by the PCH, the error of the oppeleins “does not exceed, Composition Content in composition by example g 1 P 1G1111--1--1- -------- ; ::: .. yuo yuo sho loo yuo yo Epokoligog er100100 Hardener A (70:30) 7.0 B (75:25) -7.4 B (80:20) 100 6.1 10.0 10.2 11.2 Gcob; Gdravdeno ratiosGshGkh and II components in hardener. t a b l ii c a 1 10.47 .. Table 2 yo 100 6.1 10.0 - Compiled by A.Zachernyuk. Editor L. Veselovska Tehred M. Didyk Proofreader L. Beskid Order 2887 Circulation 585 Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology CQCP 113035, Moscow, Zh-35, 4/5, Raushsk nab. Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101