SU857187A1 - Binder for chemically resistant materials - Google Patents

Description

(54) CONNECTING FOR CHEMICAL RESISTANCE MATERIALS

I

The invention relates to a binder for chemically resistant materials such as fiberglass, polymer solution, mastic and coating, and can be used in shipbuilding and aircraft construction, in the construction of industrial buildings, structures and other objects.

As is known, during the operation of a building, a structure, a material is exposed to aggressive air and liquid media, causing a significant weakening of their performance characteristics, and sometimes destruction of building structures and materials. For the prevention of such phenomena, various anti-corrosion measures are used, one of which is the use of protective chemically resistant materials, for example, based on poly (} polyunsaturated unsaturated resins (PS), polyurethane resins (ES) or epoxy resins (ES).

Among polyester resins, polyethers with a bisphenol structure in the main chain, for example, PN-15 polyester maleate and Slocril polyester acrylate, differ in their maximum chemical resistance.

The widespread practical application of CHEMICAL Epoxy binders is made difficult by the high viscosity of the original resins and the relatively long acid-curing process associated in the first stage with the opening of the epoxy ring and the formation of an ester bond.

The closest in technical essence and the achieved result to the proposed is a binder for chemical resistant materials, including glycidyldian and o.-unsaturated monocarboxylic acid dysfir and an unsaturated crosslinking agent with a 50:50 weight ratio of components, in order to reduce viscosity and increase the rate of binder polymerization, epoxy groups of the resin are previously completely esterified with organic acids or their esters, for example, α-acrylic acids or acid maleic esters s. As a result, the resin viscosity is not reduced, which improves compatibility, but also improves the properties of compounds such as elasticity and heat resistance.

Known compound E11M-2 does not contain free acid and epoxy groups. Epoxy groups are completely esterified with organic acids or their esters.

The absence of free acid makes it difficult to cure the composition with a known redox reducer.

LR, -0-CH, -CH-CHg-0 -OC C-CHg

CH —CH — CHiO • G — radical of aliphatic CH 3 hydrocarbon L 1-2, R ,, —H —; -CH, at the following ratio of components, wt.%: Diester of oligoglycidyldian and an oC-unsaturated monocarboxylic acid 38.5-61.0 Monoether5.5-26.8 Unsaturated crosslinking agent 27.8-50.0 The proposed binder contains 1 -3% free epoxy groups and 1-3% acid groups in terms of a mixture of mono- and diester, which makes it possible for it to cure by oxidation-reduction systems at room temperature. Such a bladder has high adhesion CHjCH-CHfODimethacrylic ester of ethylene glycol. Composition of the press material (formulation 1) the composition of the above composition (curing initiator Pkum peroxide

1 systems at room temp. In addition, due to the lack of svbnods epoxy groups of the ta-. These binders do not provide high adhesion to glass fibers and other fillers, which adversely affect the water and chemical resistance of the finished materials.

The purpose of the invention is to improve the water resistance of the binder with a simultaneous increase in adhesive strength.

This goal is achieved by the fact that the binder, including the diester of an oligoglycidyl-dian and c6 unsaturated monocarb. Acid and an unsaturated crosslinking agent, additionally contains. lives monoether general formula

OH To fiberglass and other fillers based on it, is characterized by high water and hintoykost. The proposed binder can be used for the preparation of polymeric, materials by contact molding, hot pressing (example 1) for the manufacture of reinforced coatings for building structures and technological equipment, working in an aggressive environment (example 3), as well as for bulk monolithic floors of industrial premises. Example 1. For the preparation of a press material, a binder of the composition is used, macy .: Dimethacrylic ester of diglyncyone 38.5 Monomethacrylic ester of diglycidyldian 26.8 CHj 0-CH -Cli- & OC-C CHg in an amount of 1.5% of the mass of the composition): t of glass fiber 18.0 kaolin36.0 zinc stearate1.3 silicone liquid No. 50.5

As the control prepare the press composition (formulation 1 and III) of a similar composition, but with is -. using in composition 11 as a binding agent, an inferior poly4 1pny styrene-free resin .ZSP-3 and in composition III — non-absorbable polyester styrene-free resin and a vinyltrythotoxysilane as an adhesion additive in the amount of up to 5% by weight of the binding agent.

The press compositions are cured at a temperature of 140 and a specific pressure of 100–200 kg / cm.

the use of the proposed binder allows a 5–10 fold increase in the water resistance of the material and the constancy of its dielectric characteristics after wetting.

Example 2. For the preparation of a binder in a mixture, in wt. H .: ED-16 zinc oxide dimethacrylic ester, mark ED-16 61.0 ED-1611.2 monomethacrylic ester ester ED-1611.2, Non-impregnated monomer (styrene), 27.8 3 % isopropylbenzene hydroperoxide and cobalt naphthenate 8%. Fiberglass is impregnated with the solution obtained and fiberglass samples are made by contact molding. The resulting material has a high water and chemical resistance, and also retains its strength after exposure to water for 30 days. Lfl- / A-c- f 0-CH, -CH CHiCH-CHio /

Unattended monomer

(styrene)

Composition of reinforced

Plastics: Binder

Accelerator (Cobalt Naphthenate) Polypropylene Fabric Art. 56231 (made from isotactic polypropylene fibers with a thickness of 230 mm in 2 layers)

/ -l

CHj

Azrosyl ADEG (azrosyl modified with diethylene glycol) 2.8 hyper .3.0

Properties of reinforced plastics are presented in table. .

Example 4. For the fabrication of monolithic floor coverings, a binder of the composition, in mass parts, is used:

Dimethacrylic ester

oligoglsschtsildiana44,5

Monomethacrylate oligoglycidyl 5,5

n i

O-CHg-CHCHg-OOC-C CHt

he Example 3. For the manufacture; reinforced coatings of building structures, technological equipment of Gwani, which is used under the influence of aggressive media, use the bond of the composition, mass hours: Dimethacrylate zfir zpoxide diane4 brand ED-16 Monomethacrylate ester of dioxododyne resin of the brand ED-16), l-Cf {-CH, -COC Non-impregnated monomer (oligoether acrylate MGF-9) 50.0 Composition of monolithic coatings, mass parts binder 100.0 methyl ethyl ketone 3, 5 accelerator BHK-2 (cobalt naphthenate solution in trimethacrylate triethanolamine) 4,5 . polyvinyl chloride powder 80.0 titanium dioxide (rutile) 2.5 Indicators Unit 1 VgCZE

MPa (mega-75-78

Pascal)

1 Ш1а 2

10.2 hks / cm

Adhesion strength on the border with polypropylene fiber during interlayer shear

Adhesive strength:

Persistence factor

5% HC 5 50% 5% HNO 15% 8571 5 10

60-65

85-87

70-72

0.90 0.86 0.91 0.91 0.91 78 The test results of the proposed monolithic flooring are given in Table. 2. Thus, using these examples, it follows that the proposed binder makes it possible to obtain materials with improved adhesion with water and chemical resistance, which will increase the service life of finished products based on them by a factor of 1.5–2 and gives a significant economic effect national households. Table I Variable Measured Slocril 2S2y §SI

 The ratio of the product of the ultimate tensile strength and the elongation before and after placement in the medium.

Indirect characteristic of the density of the structure of polymers.

Claims (3)

1. Smokin V.F. and Figovsky O.L. Polyester and polyurethane resins in construction. Kiev, Bud Velnik, 1974, - p. 54-78. 2.Nikolaev A.F. Plastics technologists. L., Chem., 1977, with. 271. 3. Authors certificate of the USSR 220492, cl. C 08 G 59/16, 1968 (prototype).