RU2277567C1 - Polymer composition - Google Patents

Abstract

FIELD: polymer materials.

SUBSTANCE: polymer composition for varnishes, adhesives, and coatings is constituted by, weight parts: epoxide dian resin ED-2, 100; maleic anhydride as hardener, 40-80; oil slime as modifier, 10-30; and aniline bottom waste with aniline content 15-18 wt parts, 1-3. Oil slime is composed of hydrocarbon fractions with boiling temperature from 293 to 470°C.

EFFECT: reduced water content and curing time of polymer composition.

1 tbl, 6 ex

Description

The claimed invention relates to the field of polymer compositions for varnishes, adhesives and coatings.

A known composition consisting of epoxy resin, anhydride hardener and accelerator (AS No. 857184, MKI C 08 L 63/00, publ. 25.08.81).

The main disadvantage of this composition is the use of a large amount of hardener and a long curing time.

Known polymer composition consisting of epoxy Dianova resin, anhydride hardener and a modifier - diglycidyl ether of xylitan (AS No. 749871, MKI C 08 L 63/02, C 08 K 5/15, publ. 23.07.80).

The main disadvantage of this composition is the long curing time.

Known polymer composition, including epoxy Dianova resin, anhydride hardener and filler, micro-filler - Aerosil and curing catalyst - undehydrated zeolite (AS No. 585196, MKI C 08 L 63/00, publ. 26.12.77).

The main disadvantage of this composition is the long curing time.

Known epoxy composition comprising an epoxy diane resin, anhydride hardener and a modifier - xylitol diglycidyl ether (AS No. 630271, MKI C 08 L 63/02, C 08 G 59/38, publ. 01.11.78).

The main disadvantage of this composition is the long curing time.

A known composition comprising an epoxy Dianova resin, anhydride hardener and saturated polyester is an oxidized polyethylene wax (AS No. 1141107, MKI C 08 L 63/02, publ. 23.02.85).

The main disadvantage of this composition is the long curing time, as well as high water absorption.

Known polymer composition comprising an epoxy diane resin, anhydride hardener and an accelerator - diphenylamino-3-allyloxy-propanol-2 (AS No. 979448, MKI C 08 L 63/02, C 08 G 59/42, publ. 07.12. 82).

The main disadvantage of this composition is the long curing time.

The closest is a polymer composition comprising an epoxy resin, a hardener, which is used isomethylene tetrahydrophthalic anhydride, a modifier (diglycidyl orthophthalate) and an accelerator (AS No. 737424, MKI C 08 L 63/00, publ. 30.05.80).

The disadvantages of this composition is its high water absorption and long curing time.

The objective of the invention is to develop a polymer composition having low water absorption, and reducing curing time.

When implementing the invention receive the following technical result:

- reduced water absorption of the composition;

- reduced curing time.

The specified technical result is achieved by the fact that:

polymer composition for varnishes, adhesives and coatings, including ED-20 epoxy dian resin, anhydride hardener, modifier and accelerator, characterized in that the composition contains maleic anhydride as an anhydride hardener, and oil sludge consisting of hydrocarbon fractions with a temperature as a modifier boiling from 293 to 470 ° C, as an accelerator - bottoms waste from the production of aniline with aniline content of 15-18 wt.h. in the following ratio of components, parts by weight:

Epoxy Dianovy resin ED-20  one hundred Maleic Anhydride  40-80 The above oil sludge  10-30 The above bottoms from aniline production  1-3

The use of distillation waste from the production of aniline in the composition as an accelerator reduces the curing time, which is due to the cyclic aromatic amines contained in it and resinous compounds of complex composition also containing amine groups. During the interaction of bottoms from aniline production with ED-20 epoxy resin, it cures.

The use of oil sludge accelerates the curing of the composition, as maleic anhydride, interacting with water contained in oil sludge, is converted into the corresponding acid, quickly curing epoxy resin, in addition, hydrocarbons contained in oil sludge reduce the water absorption of the composition.

The claimed limits of the components are due to the following.

The decrease in the amount of bottoms waste production of aniline less than 1 wt.h. increases the curing time of the composition. With an increase in the amount of bottoms waste from the production of aniline more than 3 parts water absorption of the composition increases and mechanical properties deteriorate.

The reduction in the amount of oil sludge less than 10 wt.h. increases curing time and water absorption. With an increase in the amount of oil sludge more than 30 parts by weight adhesion and mechanical properties are deteriorated.

The composition is prepared as follows.

The ED-20 epoxy resin Diane is heated to 70-80 ° C, then maleic anhydride is added and mixed until the anhydride is completely dissolved. Then, with stirring, oil sludge and bottoms from aniline production are introduced.

Composition of bottoms waste from aniline production (TP of aniline production by Orgsyntez CJSC Volzhsky, stage of commodity aniline isolation), parts by weight:

Aniline  15-18 Cyclohexylamine  0-10 Toluidine  2-4 Diphenylamine  3-20 Metaphenylenediamine  1-3 Oh p-aminophenols  1-6 Sodium hydroxide  1-3 High boiling high molecular weight resinous substances  6-45

Oil sludge consists of hydrocarbon fractions with a boiling point of 293 to 470 ° C.

The invention is illustrated by the following examples.

Example 1

40 kg of maleic anhydride are added to 100 kg of ED-20 epoxy diane resin ED-20 heated to 70-80 ° C and stirred until the anhydride is completely dissolved. Then, with stirring, 10 kg of oil sludge and 1 kg of bottoms waste from the production of aniline are introduced.

Example 2-5 are carried out analogously to example 1, changing the amount of oil sludge, maleic anhydride and bottoms waste production of aniline. Data on the composition and properties of the compositions are given in the table.

Tests for water absorption were carried out in accordance with GOST 4650-80, for adhesion to steel in accordance with GOST 15140-78.

Determination of the degree of cure. Pre-weighed powdered samples of the cured compositions in filter paper bags were placed in a Saxlet apparatus and extracted with acetone for 6 hours. Next, samples were removed from the apparatus and dried to constant weight. The degree of cure was determined by the following formula:

where a is the weight of the unextracted sample, b is the weight of the sample after extraction and drying.

Table Components The content of components, parts by weight In the proposed method according to example Prototype one 2 3 four 5 6 Epoxy Dianovy resin ED-20 one hundred one hundred one hundred one hundred one hundred 70 Oil sludge 10 thirty twenty twenty twenty - Maleic Anhydride 40 40 60 80 40 - VAT waste aniline production one one 2 3 one - Isomethylene tetrahydrophthalic anhydride - - - - - 66.5 Diglycidylorthophthalate - - - - - thirty Accelerator UP - 606/2 - - - - - 0.5 Water absorption,% 0.06 0.01 0.01 0.01 0.01 0.18 Curing time, min 60 thirty thirty twenty 45 600 Adhesion to steel kgf / cm ² (separation method) 200 210 210 230 210 - The degree of cure,% one hundred 92 92 95 90 -

The table shows that the water absorption and curing time of this polymer composition exceeds the prototype, and also has good adhesive properties.

Claims (1)

A polymer composition for varnishes, adhesives and coatings, including ED-20 epoxy dian resin, an anhydride hardener, a modifier and an accelerator, characterized in that the composition contains maleic anhydride as an anhydride hardener, and oil sludge consisting of hydrocarbon fractions with a temperature as a modifier boiling from 293 ° C to 470 ° C, as an accelerator - bottoms waste of aniline production with aniline content of 15-18 parts by weight, in the following ratio of components, parts by weight: Epoxy Dianovy resin ED-20 one hundred Maleic Anhydride 40-80 The above oil sludge 10-30 The above bottoms from aniline production 1-3