SU1740388A1 - Polymeric composition - Google Patents

Abstract

SUMMARY OF THE INVENTION: the composition contains, in weight per weight: epoxy resin Dianova 100; maleic anhydride 12.7-15.0; the product of the interaction of polyoxypropylene pentol, toluene diisocyanate and allylamine of the formula CH2 CH-CH2-NHCONH CbH3 (CH3) MHCO-0-CH- (CH3) CH2 2-0-CH2 - {CH (0) - CH2-CH (CH3) - CH (0) -MH- (H3C) CbH3MN-C (0) -MH CH2-CH 2 CH 3} 3 CH 2-0-CH 2 -CH (CH 3) (0) NH (H 3 C) C 6 H 3 NHH-C (0) -NH- CH-CH CH2 with a bromine number of 42.5, the content of urethane groups is 15.9%. urea groups 15.5%. The epoxy resin and the product of the interaction of polyox propylene pentol, toluene diisocyanate and allylamine are stirred for 10 minutes. Maleic anhydride is added and re-mixed at 60 ° C for 10 minutes. The release is carried out at 55-65 ° C for 24 hours. Composition characteristics: adhesion to steel 32-35 MPa. tensile strength of 89-98 MPa. compressive strength 189-195 MPa, martins heat resistance 138 140 ° C, moisture resistance 0.10-0.15% at 25 ° C Stabl. sl C

Description

The invention relates to high-molecular compounds, in particular compounds based on x-oxide and oligomers, namely, branched polyether urethane oligomers with urea and allyl groups for the electrical industry, and can be used as cast and impregnation insulation.

Epoxy compositions based on epoxy dianes and linear polyether urethane oligomers with terminal epoxy and allyl groups are known. They have stable physicochemical properties, however, they have low mechanical strength (mp 315 kgf / cm2, asg 830 kgf / cm2) and heat resistance (60 ° C according to Martins).

Also known is the epoxy composition based on diane epoxy resin ED-20 and a branched polyether urethane oligomer containing three urine, urethane, and terminal allyl groups. The resulting epoxy compositions have rather high dielectric properties (E 35-60 kV / mm) and heat resistance 92-123 ° C according to Martins), however, they are characterized by low adhesive characteristics (aadg to steel - 180-190 kgf / sgD

The aim of the invention is to improve the adhesion characteristics of the polymer composition based on epoxy resin ED-20.

To achieve this goal, a Dianova based epoxy composition

1 on

SL) 00 00

ED-20 epoxy resin and hardener additionally injected oligomer containing simultaneously 5 urethane each. urea and allyl groups, based on polyoxypropylenepentol, toluene di-isocyanate and allylamine, of the formula (PAM)

CH3 H3C pN-C-N-CH2-CH2 CH2

: H2-ofcH2-cH-o} 2-c-N non

he

CH, H3C pN-C-N-CH7-CH CHc

3 w IN 412 (

CH-O-fcH CH-QJy-C-N HON J2 μ i

about n i H5s pj1-s-s-sn2-sn ch2

H-0 {CH2-CH-0 -C-N H 0 H

6 H

CH3 H3cON-C-N-CH2-CH CH2 H-0 {SNGSN-01-C- GN 0 H

J2 || i

he

3H3CON C-N-CH2-CH CH2

n2-o {sn2-sn-o-c-fn about

he

CH:

with the following ratio of components, ma.ch:

Dianova epoxy resin ED-20100

Hardener of maleic anhydride 12.7-15,0

The product of the interaction of polyoxypropylenepentol, toluene diisocyanate and allylamine 10-40

Oligomer was prepared as follows.

The flask was loaded with polyoxypropylene pentol and toluene diisocyanate at a ratio of –OH polyol to –NCO of toluene diisocyanate, equal to 1: 2. The synthesis is carried out at 50 ± 5 ° C for 4 hours to 50% conversion of the isocyanate groups, then allylamine is charged into the flask at a ratio of -NCO: -NH2 1: 1 and the synthesis is carried out until the isocyanate groups are completely converted. Physico-chemical characteristics of the oligomer are given in table. 1 and 2

The oligomer is soluble in many organic solvents, but not soluble in water, n-heptane.

The proposed polymer composition differs from the known introduction of a new

oligomer containing five urea. urethane. allyl groups simultaneously.

PRI me R. Dianova ED-20 epoxy resin and PAM oligomer are loaded into the mixer and mixed thoroughly. The curing agent is added before curing and mixed again. To obtain a polymer composition, 6 mixtures of components are prepared, each containing by weight, wt.%: Dianova epoxy resin ED-20 100, differing from each other in the content of hardener - maleic anhydride (MA). equal in each mixture 11.7: 12.7; 13.7: 14.7: 15.0; 16.0 respectively; PAM content equal to 5, 10, 20, 30 in each mixture.

40, 50, respectively. Mixture 7 is prepared by a known method. The survivability and duration of curing of the polymer composition is determined from the moment the curing agent is added to the composition. Cure

held for 24 hours at 60 ± 5 ° C.

In tab. 3 shows the properties of the obtained polymer compositions.

Thus, the analysis of the data in the table shows that the proposed polymer

the composition has high adhesion to steel while maintaining other physicochemical and electrical properties.

Claims (1)

The formula of the invention of the lamin, from l ica schA so that, with the aim of 35 increase in strength properties, adgePolymer composition including heat resistance, it contains the product of interstitial maleic anhydride and the modifier - polyoxypropylenepentol pro-polymer, a toluene reactant of polyoxypropylene-dihydrocyte and anhydropyrophylcapsules, and a modifier, and polyoxylpropylenepentol. sn. CH2-0 {CH2-CH-0 L-C-N N ° N  ii i Shh 2 and. HE H3c) Nc-n H3C) N-C-NCH-0 {CH2-CH-0 -C-N H OH J2 n | HE sn3 H3sryts-sn2-sn CH-o {CH2-CH-o r-C-N HON 2 n about n sn3 n3sOy-s-s-sn2-sn ch2 CH-0- CH2-CH-0 -C-N НОН he CH3 H3CpN-C-N-CH2-CH CH2 CH2-0 {CH2-CH-OJ-C-N H ° H he with a bromine number of 42.5 urethane groups of 15.9% of the urea components, wt.h .. Epoxy Dianova resin100 H3CON-C-N-CH2-CH CH, -C-N N ° N Z ii i 2 and. HE H3C) N — C — NCH2 — CH CH, -C-N H OH 2 n | Hardener is maleic anhydride Specified modifier 12.7-15.0 10-40 Table 1 table 2 Table 3