FIELD: polymer materials.
SUBSTANCE: group of inventions relates to polymer composite materials produced from phthalonitrile oligomers as a component of a polymerisable resin for protective coatings of a polymer composite matrix. Materials with phthalonitrile matrices can be applied in engine parts in the aerospace industry, for high-temperature protection of electronics, and for application in shipbuilding in manufacture of non-flammable interior elements of submarines. The phthalonitrile oligomer as a component of a polymerisable resin for protective coatings of a polymer composite matrix constitutes a compound by the formula (I)
(I),
or the formula (II)
(II),
or the formula (III)
(III).
Described is a method for producing a phthalonitrile oligomer, characterised by consecutive nucleophilic substitution of fluorine atoms in hexafluorobenzene and/or a nitro group in 4-nitrophthalonitrile with hydroxyl-containing aromatic compounds. Also described are a composition for preparing a thermosetting resin, including at least one compound (I) or (II) or a mixture thereof with a compound by the formula (III), and a hardener, a method for preparing a thermosetting resin, and a method for preparing a thermosetting varnish. The thermosetting resin can be applied to the surface of a composite in the form of a melt or varnish (a solution of resin in an organic solvent) to create protective coatings.
EFFECT: production of a thermosetting resin based on fluorine-containing oligomers, exhibiting enhanced thermal-oxidative stability in the hardened form, as a protective coating, allowing for preservation (~90%) of the operating characteristics of PCM even after 200 h at 350°C; unlike known coatings based on phthalonitrile resins allowing, in the same conditions, for preservation of only ~70% of the initial operating characteristics of the composite; and characterised by ease of application.
29 cl, 1 tbl, 56 ex
| Title | Year | Author | Number |
|---|---|---|---|
| REACTIVE THINNER OF PHTHALONITRILE RESINS AND THERMOSETTING COMPOSITION BASED THEREON | 2018 |
|
RU2712547C1 |
| 4,4'-(((1,4-PHENYLENEBIS(OXY))BIS(4,1-PHENYLENE))BIS(OXY))DIPHTALONITRILE | 2018 |
|
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| TRIFUNCTIONAL PHTHALONITRILE MONOMER, METHOD FOR PRODUCTION THEREOF AND BINDER-BASED COMPOSITION THEREOF | 2019 |
|
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| ORGANOSILICON FRAGMENT MODIFIED PHTHALONITRILE MONOMER, METHOD FOR PRODUCTION THEREOF, BINDER BASED THERON AND PREPREG | 2014 |
|
RU2580927C1 |
| PHTHALONITRILE MONOMER MODIFIED BY ORGANOPHOSPHORUS FRAGMENTS, METHOD OF ITS PRODUCTION, BINDING ON ITS BASIS AND PREPREG | 2016 |
|
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| PHTHALONITRILE BINDER COMPOSITION FOR POLYMER COMPOSITE MATERIALS, A METHOD FOR PRODUCTION THEREOF, A METHOD OF PRODUCING A POLYMER COMPOSITE MATERIAL AND A MATERIAL OBTAINED USING SAID METHOD | 2018 |
|
RU2695606C1 |
| HEAT-RESISTANT LOW-VISCOSITY BINDER FOR THE MANUFACTURE OF PRODUCTS BY METHODS OF VACUUM INFUSION AND IMPREGNATION UNDER PRESSURE AND A METHOD FOR ITS PRODUCTION | 2021 |
|
RU2762559C1 |
| PHTHALONITRILE BINDER AND COMPOSITION BASED ON IT, INTENDED FOR MANUFACTURE OF POLYMER COMPOSITE MATERIAL | 2021 |
|
RU2789601C1 |
| METHOD FOR SYNTHESIS OF MONO- AND DIPHTHALONITRILES | 1995 |
|
RU2079488C1 |
| SOLUTION-FREE METHOD OF PRODUCING PHTHALONITRILE PREPREG AND POLYMER COMPOSITE MATERIAL BASED THEREON | 2019 |
|
RU2740286C1 |
