RU2507227C2 - Polymer composition - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: invention relates to high-strength polymer compositions intended for making articles from composite materials, applying anticorrosive and decorative coatings with high resistance to weather and ultraviolet radiation. The polymer composition contains an adduct of amines with epoxy resins, an active diluent and a product of reacting di- or polyepoxy compounds with nitrogen-containing components, where the nitrogen-containing component used is a mixture consisting of a compound having in its structure one or more tertiary nitrogen atoms and simultaneously one or more functional groups -NCO, -OH, -CH₂OH and a compound containing, along with a tertiary nitrogen atom, a primary or secondary amino group, and the reaction is carried out by mixing at temperature ranging from 40°C to 220°C in 10-150 minutes.

EFFECT: composition improves processing properties and improves static and dynamic properties after climatic and ultraviolet exposure of materials based on said composition.

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Description

The invention relates to high-strength polymer compositions based on epoxy resins and cycloaliphatic dioxides, intended for the manufacture of products from composite materials, applying anti-corrosion and decorative coatings with high resistance to climatic and ultraviolet radiation, as well as pouring and impregnating compounds for electrical purposes and other purposes.

The closest prototype of the claimed invention are polymeric compositions based on epoxy resins containing as hardeners amino adducts obtained by the interaction of aliphatic or aromatic amines with epoxy diane or aliphatic resins, and active diluents (see "Reference to plastic masses" edited by V. M. Kataev et al. 1975, Chemistry Publishing House, pp. 207 and 219).

The disadvantages of the described compositions are the relatively low technological properties - low viability during processing, high peak temperature of the exothermic reaction during curing of the products formed from them, and most importantly, a significant decrease in strength indicators after climatic exposure.

The aim of the claimed polymer composition is to improve technological properties during processing and increase static and dynamic indicators after climatic and ultraviolet exposure to materials based on it.

This goal is achieved in that the polymer composition, along with the adduct and the active diluent, contains the product of the interaction of di- or polyepoxide compounds with nitrogen-containing components, where as a nitrogen-containing component a mixture is used consisting of a compound having one or more tertiary nitrogen atoms in its structure and at the same time one or more functional groups -NCO, -OH, -CH ₂ OH (a) and a compound containing in addition to a tertiary nitrogen atom primary or secondary amine group (B) in relation AI A: B from 99: 1 to 70:30, and the interaction operation is carried out at a ratio of epoxy compound: nitrogen-containing component from 90:10 to 50:50 by stirring at a temperature of from 40 ° to 220 ° C for 10 minutes to 150 minutes, while the composition contains in mass parts:

epoxy compound one hundred active diluent 1 ÷ 100 amine adduct 5 ÷ 100 interaction product 8 ÷ 150

Example 1

Getting product interaction.

In a reactor equipped with heating, cooling and a high-speed stirrer, 70 parts by weight of UP-606/2 grade 2,4,6-tris (dimethylaminomethyl) phenol, which is a complete analogue of the foreign product DMP-30 (A), and 30 parts by weight are loaded pyrazole (B), after which the temperature in the reactor was raised to 90 ° C and, with the stirrer operating (500 rpm), 290 mass parts of the epoxy compound 4,4'-dioxiphenylsulfone diglycidyl ether were charged and the temperature was raised to 120 ° C. The interaction of the components at this temperature occurs within 80 minutes.

The resulting hardener is cooled and poured into a metal container.

Obtaining a polymer composition.

In another reactor, equipped with heating and a stirrer, 100 parts by weight of an epoxy compound, vinylcyclohexene dioxide and 50 parts by weight of an active diluent, polyepichlorohydrin diglycidyl ether (E-181 resin), are loaded and stirred for 15 minutes at 70 ° C. Then, 80 parts by weight of the obtained reaction product and 50 parts by weight of an adduct of diethylene triamine with an Ed-16 resin obtained with a six-fold molar excess of the latter are charged and stirred for 10 minutes at 70 ° C, poured into metal molds and cured for 24 hours at room temperature.

Examples 2 ÷ 7 carry out analogously to example 1 with a change in parameters and ingredients in accordance with table 1.

The properties of the inventive polymer composition obtained in examples 1 ÷ 8 are shown in table 2, showing its advantages over the known solutions.

table 2 The properties of the inventive polymer composition according to examples 1 ÷ 8 in comparison with the prototype. No. p / p Name of indicator The value of the examples one 2 3 four 5 6 7 8 prototype one. The stability of the starting components during storage without changing the viscosity, months Not less than 12 No more 2 The viability of the composition in a mass of 200 gr. Not less than a day thirty at 20 ° С, min at 60 ° C, min No less than 300 5 3 Peak temperature of the exothermic curing reaction at 60 ° C in a sample of cubic resin with a hardener in a mass of 1000 g 150 145 148 135 140 135 155 135 280 four Strength in static bending, MPa
- initial sample 130 140 140 135 140 135 140 142 120 - after a sample of 12 months of climatic impact on the roof of the building in the conditions of Moscow 120 135 145 138 142 130 135 138 60 5 Specific impact strength, kJ / m ² - initial sample 42 40 38 36 42 37 38 36 eighteen - sample after 12 months of exposure on the roof of the building
in Moscow 39 35 34 35 40 34 36 34 6

Claims (1)

A polymer composition based on epoxy compounds and an active diluent, containing an amine adduct with epoxy resins, characterized in that, along with the adduct, it contains the product of the interaction of di- or polyepoxide compounds with nitrogen-containing components, where as a nitrogen-containing component a mixture consisting of a compound having in its structure one or several tertiary nitrogen atoms and simultaneously one or more functional groups -NCO, -OH, -CH ₂ OH (a) and a compound containing along with tert primary nitrogen or secondary amino group (B) in a ratio of A: B from 99: 1 to 70:30, and the interaction operation is carried out at a ratio of epoxy compound: nitrogen-containing component from 90:10 to 50:50 by stirring at a temperature of 40 ° up to 220 ° C for from 10 minutes to 150 minutes, while the composition contains, by weight:
epoxy compound one hundred active diluent 1 ÷ 100 amine adduct 5 ÷ 100 interaction product 8 ÷ 150