WO2009031914A1

WO2009031914A1 - Polymer composition for protective anticorrosion barrier-type coating

Info

Publication number: WO2009031914A1
Application number: PCT/RU2007/000462
Authority: WO
Inventors: Vitaly Vladislavovich Revenko; Maxim Aleksandrovich Komarov; Sergey Konstantinovich Perepechin
Original assignee: Joint Stock Company 'bazaltoplastic'
Priority date: 2007-09-04
Filing date: 2007-09-04
Publication date: 2009-03-12

Abstract

The invention relates to producing a wear-resistant and aggressive medium-resistant polymer coating for metal and concrete structural elements of buildings and constructions, for anticorrosion protection of pipeline structural elements and metal components and units in different engineering sectors, for forming wear-resistant anticorrosion self-leveling floors resistant to solvents and petroleum products and for decorative finishing of the protected surfaces. The inventive polymer composition relates to two-container compositions and is produced by combining ( just prior to the application thereof) a component A, containing epoxy-diane resin, epoxy-aliphatic resin and andesite basalt scale of the size of 0.001-0.4 mm, and a component B, containing a mixture of hardener and the andesite basalt scale. The thus produced coating exhibits high barrier properties, prevents a protected surface from being brought in contact with an aggressive corrosion-generating medium and is wear-resistant.

Description

Polymer composition for protective anticorrosive coating of a barrier type.

Description

Purpose of the invention

The invention relates to chemical technology and specifically relates to the creation of anticorrosive barrier coatings on various surfaces, intended for the construction of wear-resistant, thixotropic coatings with increased resistance to aggressive environments and can be used to protect structural elements from metal, concrete, pipelines, buildings and structures, metal units and assemblies in various industries, when creating wear-resistant anti-corrosion bulk floors, resistant to solvent m and petroleum products as well as decorative finishing various surfaces.

BACKGROUND OF THE INVENTION AND PRIOR ART

It is known that polymer compositions traditionally used to obtain anti-corrosion coatings are typically filled and, in particular, highly filled. SUBSTITUTE SHEET (RULE 26) As fillers for these purposes (for anti-corrosion coatings), for example, silica sand (RU 225 0946, 27.04,2005), full microspheres (RU 2004113553, 10.20.2005), various aluminosilicates (andesites, concrete, perlites, vermiculites, oxides) are used. metals RU 2265619. 11/20/2005), talc, graphite (RU 2264428, 11/20/2005).

In this case, various fillers are used: lamellar, spherical, finely dispersed fillers with a developed surface.

Of the polymers for these purposes, epoxy resins are widely used in view of good adhesion to various surfaces and chemical resistance to aggressive environments.

From SU 431198, 05.06.1974, an anticorrosive composition is known containing an epoxy resin, dibutyl phthalate, an acid hardener and an accelerator, for example dimethylaniline, having increased wear resistance and heat resistance of the composition under conditions of waterjet wear and containing highly dispersed silicon dioxide with a specific surface area of 150-400 m ² / g and the mineral filler and the components are taken in the following ratio (in wt. h).

• Epoxy Dianova resin 100

• Dibutyl phthalate 10 - 20

• Highly dispersed silica 1.5 - 3

• Acid hardener 30 - 50

• Mineral filler 100 - 500

• Accelerator, such as dimethylaniline 0.1 - 05

Moreover, as a hardener, the composition contains phthalic and maleic anhydrites, as a mineral filler - diabase flour, basalt flour, andesitic flour, silicon carbide, electrocorundum.

SUBSTITUTE SHEET (RULE 26) The composition provides the surface to be protected with increased heat resistance and wear resistance under conditions of hydroabrasive wear, but at present it does not meet the increased requirements.

Another epoxy composition is known from SU 443047, 09/15/1974, used to protect concrete surfaces from destruction, for example, surfaces of sewer pipes and is a mixture of epoxy diane resin, anthracene oil, hardeners - polyethylene polyamine and triethanolamine, and a filler, which is used as basalt flour .

This known composition also provides increased wear resistance to the coating, but has a long cure time of 6 -18 hours, and is also quite toxic due to the high content of anthracene oil in it.

Thus, it is widely known from a known level that various basaltic fillers (fillers from natural materials of the basaltic group (basalts, andesitobasalts, andesites, gabbro, etc.) are widely used for the production of anticorrosive coatings with enhanced chemical resistance).

Known epoxy resin coating composition used to protect equipment and building structures from corrosion. The components contain a low molecular weight epoxy resin ED - 5 or ED - 6 as a binder, hardener (polyethylene polyamine) and filler - andesitic flour in the amount of 100 parts by weight per 100 parts by weight epoxy resin. The resin is mixed with the filler, and the hardener is added immediately before use. However, this composition contains a relatively large amount of hardener and has insufficient strength.

The basalt filler is known from the prior art both in the form of basalt flour (SU 2260022, 09/10/2005; SU 827511, 05.21.1978) and basalt flakes.

SUBSTITUTE SHEET (RULE 26) It has been known for some time now that fillers with flake or plate shaped particles are a special class of reinforcing fillers.

In particular, flake fillers, including the basalt group, are used both for applying thin-layer coatings to objects for various purposes in order to protect them from corrosion and abrasive wear, and in the manufacture of chemically resistant and durable composites, heat-insulating materials, roofing materials, paper and other products and composite materials.

So, now it’s quite widely known that such flakes or flakes, and in particular from basalt rock, can serve as chemically active fillers of various composite materials (preferably polymerizable composites) to obtain protective and protective-decorative coatings with high atmospheric and water resistance indicators (when protecting metal tanks, bridges, offshore drilling platforms, etc.) and / or resistance to abrasion (for example, a pipeline for pumping pulp).

Accordingly, they must satisfy a set of systematically toughening difficultly incompatible requirements, of which the most important are: the highest possible chemical activity, estimated at least by their specific surface area of flakes or flakes of active sites, which contribute to the polymerization of various oligomeric binders and the establishment of a chemical relationship between macromolecules polymers and inorganic components; the highest possible mechanical strength, which determines the closed reinforcing effect in finished compositions even at low concentrations of plate fillers;

SUBSTITUTE SHEET (RULE 26) the highest chemical stability possible (in particular, corrosion resistance), which facilitates the storage of fillers and their use in many composites, usually including corrosive ingredients in the initial uncured mixtures, and availability for a wide range of consumers, determined by the possibility of mass production and resource costs.

For example, from SU 1831871, 05.27.1995, a chemically resistant polymer composition for coatings based on acrylate monomers in combination with polyisocyanate, divinylbenzene and containing basalt scales as a filler is known. However, the composition is quite toxic.

From SU 1825514, 27.04.1995 known wear-resistant polymer composition based on an unsaturated polyester resin and containing as activated basalt filler scales (Zmkm thickness, density 2.2 - 3.0 g / cm ^3, the dimensions of 100 - 2000mkm). However, this composition is complex in composition and contains many toxic components (polyisocyanate, fluorinated alcohol, the product of the interaction of allyl alcohol with toluene diisocyanate, a polymerization initiator, a block copolymer of ocean floor polyorganosilane with polyoxyalkylene). The composition is prepared by mixing all the components that make up its composition.

Due to the peculiarities of its structure, scaly fillers are difficult to introduce into polymer compositions in the usual way; special difficulties arise when they are introduced in large quantities, as well as during storage.

The so-called two-pack (or two-component) coating compositions are known in the art, especially in the field of producing epoxy compositions.

SUBSTITUTE SHEET (RULE 26) For example, from Chinese patent CN 1164556, 11/12/1997, a two-component epoxy resin anti-corrosion paint is known. The paint is prepared by mixing component A and component B.

Component A consists of an epoxy resin with a molecular weight of 190 - 600, epoxies with a molecular weight of 600 - 1700, precipitated barite, iron filings, fibrous filler, and an organic solvent. Component B contains coal tar (emulsion), polyamide, phenol - a modified polyamine, Pengtong powder and an organic solvent.

From SU 2057157? 03/27/1996? known oil-benzene coating composition, which includes an epoxy-dianic resin ED - 20, 2-furylaldehyde, a solution of diethylene triaminomethylphenol in acetone (with a mass ratio of 2: 1), polybenzylpyridinium chloride (M. M. 420), perchlorovinyl oval resin, basal.

As a filler of the polymer composition, basalt scales of various modifications (activated and non-activated) are used.

A known composition is prepared as follows.

A solution of diethylene triaminomethylphenol in acetone is prepared in a ratio of 2: 1, for example, 100 m.h. diethylenetriaminomethylphenol is dissolved with 50 m.h. acetone. Then take 30 m.h. a solution of diethylene triaminomethylphenol, mix thoroughly with 0.03 wt.h. perchlorofinilovoy resin component A. epoxy-dianovoy resin ED - 20 in the amount of 50 wt.h. 2-pyrildehyde component B.

Component A is combined with component B, mixed thoroughly and 0.02 parts by weight are added. polybenzylpyridinium chloride and 5 parts by weight activated basalt flakes. Mix thoroughly. Curing of the composition occurs without heating.

SUBSTITUTE SHEET (RULE 26) But this composition is also quite toxic due to the presence of furylaldehyde, polybenzylpyridinium chloride, and also because of the difficulties encountered when introducing separately basalt scales.

Thus, given the widespread use of basalt scales as a filler, there are some problems associated with its storage and incorporation into polymer coating compositions.

Therefore, the technical task of this invention was the creation of a polymer composition for anti-corrosion coating using basalt scales as a filler, which also has good barrier (protective) properties.

Summary of the invention, disclosure of the invention.

So, the technical task of the claimed invention is to reduce the toxicity of the composition, improve its barrier protective properties when coating and expand its functional purpose.

The stated technical problem is achieved in that the polymer composition for a protective barrier type on various surfaces, including epoxy Dianova resin, hardener, basalt filler, contains andesitic basalt scales with a fraction size of 0.001 - 0.4 mm as a basalt filler, aromatic oligoamide as a hardener type ETAL, additionally an aliphatic epoxy resin, while the composition is two-pack and is formed by combining component A containing in mass%:

• epoxy diane resin 60-62;

• aliphatic epoxy resin 12-13;

SUBSTITUTE SHEET (RULE 26) • the specified andesitic basalt scales 26-27 '; and component B, containing in mass%:

• the specified oligoamide hardener 71-73;

• the specified andesitic basalt scales 27.0-29 (27-29); and with a ratio of component A and component B from 1: 0.01 to 1: 100.

The polymer composition according to the invention as an epoxy Dianova resin contains, for example, epoxy Dianova resin ED-20, ED-16, ED-40.

As the epoxy aliphatic resin contains, for example, epoxy aliphatic resin DEG-1.

As a hardener, the polymer composition according to the invention contains ETAL type hardeners manufactured by Epital (Moscow), for example ETAL-45M (aromatic oligoamide); It is non-toxic and designed to cure epoxy resins at temperatures from -7 ° C to 45 ° C in conditions of any humidity. (TU 2257-045-18826195-01).

In the claimed composition, a basalt plate filler is used, for example, in the form of andesitic basalt scales with a fractional size (fraction sizes) of 0.001 - 0.4 mm, for example, grade АБЧ - 100.

The andesitic basalt scales used in the claimed invention are obtained from the natural material of the basalt group - andesitobasalts (from the melt), followed by the formation of solid vitrified laminated particles from the melt and chemothermal treatment in an oxidizing gas environment.

SUBSTITUTE SHEET (RULE 26) Detailed Description of the Invention

The following are examples of the description of the technological scheme of the process of obtaining a polymer composition according to the invention, illustrating the invention, but not limiting it.

1. First, component A is prepared by mixing epoxy resins (epoxy Dianova resin, for example, grade ED-20 and aliphatic epoxy resin, such as DEG-1 brand), then disperse andesitic basalt scales with a particle size of 0.001-0.4 mm in the resulting mixture of epoxy resins .

2. Get component B by mixing the hardener ETAL-45M with andesitic basalt scales.

3. Next (before use) carry out the mixing of component A and component B in a ratio of 1: 0.1; eleven; 1: 50; according to examples.

Table 1 shows the quantitative ratio of the composition of components A and B.

Table 1 Component A

SUBSTITUTE SHEET (RULE 26) Component B

Table 2 presents the main characteristics of the obtained components A and B, as components of the claimed two-pack polymer composition.

table 2

SUBSTITUTE SHEET (RULE 26) Before applying the coating from the claimed polymer composition, components A and B (prepared in advance and stored separately from each other) are mixed, for example, in a screw type mixer or in a heated reactor with a ratio of 1: 0.01 to 1: 100.

Depending on the coating method, type, its viscosity of the composition (working viscosity) is controlled using organic solvents traditionally used for these purposes, for example, solvent N ° 646, RB, ethanol and other similar solvents.

The resulting coating provides its purpose - to prevent contact of the corrosive medium with the surface being protected due to the barrier structure of the polymer coating and resistance to aggressive environments of the polymer base.

Industrial applicability

The resulting coating, in particular, has good adhesion to various surfaces (metal, concrete, etc.), good elasticity, resistance to aggressive environments, waterproof:

• tensile strength at separation - 40.0 - 50.0 MPa

• ultimate strength in bending - 70 - 75 MPa

• toughness, A, kJ / sq m ^x = 15.0 - 16.0

• breakdown strength> 25 Kv / cm ^x sq.

SUBSTITUTE SHEET (RULE 26)

Claims

CLAIM

A polymer composition for protective barrier-type anti-corrosion coating on various surfaces, including epoxy Diani resin, hardener, basalt filler, characterized in that it contains andesitic basalt scales with a particle size of 0.001 - 0.4 mm, aromatic oligoamide as a hardener ETAL type, additionally aliphatic epoxy resin, while the composition is two-pack and is formed by combining component A, containing in mass%: epoxy dian -hand resin 60 - 62 aliphatic epoxy resin 12 - 13 specified andesite, basalt scales 26 - 27 and Component B comprising in wt%: said oligoamidny Hardener 71 - 73 specified andesite, basalt scales 27.0 - 29.0

and about the ratio of component A and component B from 1: 0.01 to 1: 100.

SUBSTITUTE SHEET (RULE 26)