RU2263126C2 - Coating composition based on modified epoxy resin - Google Patents

Abstract

FIELD: building materials.

SUBSTANCE: invention relates to a method for preparing the coating composition based on modified epoxy resin used in protection of building constructions, for example, as a component for pouring floorings. The composition comprises the following ratio of components, wt.-%: epoxy diane resin, 55.0-63.0; amine hardening agent as a mixture of isophoronediamine, 13.0-20.3, and one of amine taken among methaxilylenediamine, 7.0-9.0, or diethylenetriamine, 5.0-6.0, or triethylenetetraamine, 5.5-6.5 and tris-(dimethylaminomethyl)phenol, 2.0-2.7, as adduct with laprolat-803, 6.5-10.5, and mixture of dioxane alcohols and their high-molecular esters (EDOS). Laprolat-803 represents polyoxypropylenetriol tricyclocarbonate propyl ester. Invention provides hardness and wear-resistance of coating.

EFFECT: improved and valuable properties of composition.

2 tbl, 7 ex

Description

The invention relates to a technology for the production of paints and varnishes, the creation of new structures to improve the properties of coatings to protect building structures, for example, in compositions for bulk floors.

Due to environmental hazards, polyurethane materials (the use of isocyanates), as well as their low chemical resistance, water resistance, high porosity, and high cost, they become less popular in the building materials market.

A number of new compounds of oligocyclocarbonates, a reactive class of compounds of oligomers under the trademarks Laprolat 803, Laprolat 301, Laproxid 503M and others have been developed.

Laprolates are carbonization products of epoxy derivatives of polyoxypropylene (laprols) and have terminal cyclocarbonate groups. Laprolates are cured by the urethane formation reaction of cyclocarbonate amine with primary aliphatic or cycloaliphatic amines, forming a hydroxyurethane structure.

Laprolates are widely used to modify existing polymers.

It is known to use epoxy resins with laprolates in an amine curable composition (SU 1754748, 1992).

Epoxycyclocarbonate resins are known - products of partial carbonization of an epoxy resin with the transition of part of the epoxy groups to cyclocarbonate (SU 1353792, 1987).

But the main merit of cyclocarbonates is their use as the main component of the film-forming to obtain isocyanate-free polyurethanes, combining good strength properties with high elasticity.

Known polymer composition for finishing water-based materials, including epoxy resin - 5-42%, hardener - the product of the interaction of oligoesters with terminal epoxy or cyclocarbonate groups with diamines, with M.M. 500-1000, containing 1-3% of amino groups 5- 50%, emulsifier - 0.1-3.0%, water - the rest.

Example No. 4 describes an example for the preparation of a composition for use as bulk floors. The composition has the following physical and mechanical properties: compressive strength 40 MPa, tensile strength 20 MPa, specific impact strength 30 kgf · cm / cm ² , elongation at break 45%. (Ru 2054440, 1992)

The closest technical solution is an organically soluble epoxy composition containing an epoxy diane resin, polyoxypropylene triol triglycidyl ether (laproxide 503 M), polyoxypropylene triol tricyclocarbonate propyl ether (laprolate 803), aminophenol hardener, acetone, and trifluorine oligomer 92 (sulfuric acid) 92, sulfonyltransfluoride 481.

The patent shows high performance coatings for specific impact strength, chemical resistance of the coating, the viability of the composition of 30-50 minutes, abrasion of 2.9 mm ³ / m

The aim of the invention is to increase the hardness and wear resistance of the coating.

The technical problem is solved by the fact that in the coating composition based on a modified epoxy diane resin, including epoxy diane resin, polyoxypropylene triol tricyclic carbonate propyl ether - laprolate 803, a diluent, a mixture of isophorone diamine and one amine selected from methaxylylenediamine, diethylamine, diethylamine is used as an amine hardener Tris (dimethylaminomethyl) phenol accelerator in the form of an adduct with laprolate 803; as a diluent, a mixture of dpoxane alcohols and their high molecular weight ethers - EDOS in the following components, wt.%:

Diane Epoxy 55.0-63.0 Tricyclocarbonate propyl polyoxypropylene triol ether - 6.5-10.5 Isophorondiamine - 13.0-20.3 Methaxylylenediamine - 7.0-9.0

or

Diethylene triamine - 5.0-6.0

or

Triethylenetetramine - 5.5 - 6.5 Tris (dimethylaminomethyl) phenol - 2.0-2.7 Diluent - the rest

The amine hardener of the composition — the adduct of laprolate with amines — is obtained by heating all components at a temperature of 60-65 ° C for 2-3 hours until the cyclocarbonate groups are completely converted.

The adduct is characterized by:

Viscosity at 25 ° C, cP - 1200-1350;

Color - light yellow;

M.M-900-1200.

Here is an example of adduct production: 8.4 kg of laprolate-803, 15.0 kg of isophorondiamine, 7.01 kg of methaxylylenediamine and 2.6 kg of K-54 accelerator are loaded into the reactor with a heating stirrer, the mixture is heated to 60-65 ° C for 3 hours to complete conversion of the cyclocarbonate groups. The conversion of cyclocarbonate groups is determined by IR spectroscopy by the disappearance of the line characterizing the cyclocarbonate group, i.e. C = O.

The characteristic of the adduct, the content of amine groups in it determines the H-equivalent weight, which for it is 115-120.

As the epoxy resin used: ED-20, ED-22 GOST 10587, DER-330, DER-331, DER-324 company "Dow Chemical Company";

Laprolate 803 - TU 6-05-221-995-88, characterized by:

Mass fraction of cyclocarbonate groups,% - 21.0-31.0;

Mass fraction of epoxy groups,% - 2.5;

Dynamic viscosity at 25 ° С, MPa · s - 3500-7500;

Metaxylylenediamine - MHDA

Viscosity 20 ° C - 6.8 cP, MM-13 6.1, Mitsubishi Gas Chemical Company.

Tris (dimethylaminomethyl) phenol K-54 is used as a reaction accelerator, Air Products;

Density kg / l - 0.971;

The amine number is 600 mg HC1 / g;

Viscosity, 25 ° C, cP - 180-380.

As isophorondiamine use Epicure 205, the company "Resolution Performance Products".

Ancamine 1618 from Air Products.

Diethylenetriamine, triethylenetetramine.

EDOS - diluent - plasticizer TU 2493-003 / 3004749-93 - a mixture of dioxane alcohols and their high-boiling esters with the addition of a stabilizer, such as ionol. Characteristic: color - transparent, dark brown; density 20 ° C - 1.08-0.03; saponification number 15 mg KOH / g; acid value - 0.3 mg KOH / g The proposed composition consists of 2 components: A - epoxy resin with a diluent, B - adduct of laprolate with amines.

Table 1 shows the formulations of epoxy compositions, and in Table 2 the properties of coatings based on them.

Due to the presence of epoxy-amine and hydroxyurethane fragments in the polymer, the resulting films combine the advantages of both classes of polymers.

Formulation of the compositions, wt.%.

Table 1 Name of components No. 1 Number 2 No. 3 Number 4 Number 5 Number 6 Prototype Epoxy resin ED-20 (Diane) 63 63 55 55 ED-22 (Diane) 60 60 23 EDOS Thinner 7.5 7.5 7.0 7.0 6.0 6.0 Laprolate-Amine Adduct Laprolate 803 6.5 6.5 8.4 8.4 10.5 10.5 11.45 Isophorondiamine 16,0 15.0 15.0 13.0 20.3 19.3 MKHD - - 7.0 9.0 - - Diethylene triamine 5,0 6.0 - - - Triethylenetetramine - - 5.5 6.5 K-54 (accelerator) 2.0 2.0 2.6 2.6 2.7 2.7 Prototype components Laproxide 503 M 11.45 Aminophenol Hardener 17.3 Mineral filler 34.5 Acetone 1.29 Trifluorochlorethylene Oligomer 0.92

Properties of compositions and coatings based on them.

table 2 The name of indicators No. 1 Number 2 No. 3 Number 4 Number 5 Number 6 Prototype The gelatinization time of the mixture, min 52 52 57 57 60 60 40 The viscosity of the mixture, MPa · s (20 ° C) 1700 1700 1850 1850 2100 2100 1950 Tensile strength, N / nm ² 48 48 45 45 40 40 31 Elongation at break,% 7.8 7.8 7.3 7.3 9.0 10.0 9.6 Shore hardness, D, conventional units 70 70 78 78 75 75 fifty Water absorption after 24 hours (weight gain),% 0.7 0.95 1,0 1,0 0.9 0.9 0.5 Acid resistance to Н ₂ SO ₄ 20% (weight gain), after 96 hours,%, 25 ° С 1.79 1.7 1.8 1.8 1.7 1.7 1.8 Abrasion Resistance, 1000 cycles, CS-17 Wheel 0,03 0.06 0.06 0.06 0.05 0.05 0.4 Specific impact strength, kJ / m ² 37 35 40 31 41 36 55 Tensile strength, MPa 40 35 33.5 thirty 40 37 thirty

Claims (1)

A composition for coating on the basis of a modified epoxy diane resin, comprising an epoxy diane resin, an amine hardener, laprolate-803 - polyoxypropylene triol tricyclic carbonate propyl ether, a diluent, characterized in that a mixture of isophorone diamine and one amine selected from methaxylethylenediamine diamine is used as amine hardener and tris (dimethylaminomethyl) phenol accelerator in the form of an adduct with laprolate-803, as a diluent - a mixture of dioxane alcohols and their high molar content molecular esters-EDOS, in the following ratio of components, wt.%: Epoxy Dianova Resin 55.0-63.0 Tricyclocarbonate propyl ether polyoxypropylene triol 6.5-10.5 Isophorondiamine 13.0-20.3 Methaxylylenediamine 7.0-9.0 or diethylenetriamine 5.0-6.0 or triethylenetetramine 5.5-6.5 Tris (dimethylaminomethyl) phenol 2.0-2.7 Diluent Rest