RU2551363C2 - Energy-preserving anticorrosion coating with reduced fire hazard and method of obtaining thereof - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: energy-preserving anticorrosion coating with reduced fire hazard includes filling agent - closed noncombustible glass hollow microspheres 3M with size from 30 to 110 mcm, representing free-flowing powders with bulk density 0.10-0.15 g/cm³, titanium dioxide, additionally contains latex of grade SKD-1S, acryl dispersions "Akremos-101" and "Akremos-402", fluralit (nano-polytetrafluoroethylene), flame retardants - decabromodiphenyloxide and aluminium hydroxide, fungicide - polyhexamethylguanidine phosphate, foam extinguisher BYK-037, with the following component ratio, wt.p.: latex of grade SKD-1S- 4.00-27.92, acryl dispersion "Akremos-101" - 32.00-55.20, acryl dispersion "Akremos-402" - 0.77-0.80, glass hollow microspheres 3M - 14.54-35.86, Fluralit (nano-polytetrafluoroethylene) - 1.00-6.20, decabromodiphenyloxide - 4.80-7.00, aluminium hydroxide - 5.10-5.10, titanium dioxide - 0.70-1.20, polyhexamethylguanidine phosphate - 0.22-0.24, foam extinguisher BYK-037 - 0.32-0.35.

EFFECT: method is characterised by good manufacturability, coating is characterized by low heat conductivity, good strength, anticorrosion, fungicidal and fire-protective properties.

2 tbl, 5 ex

Description

The invention relates to energy-saving building materials that do not support combustion, which can be used for thermal insulation of surfaces of various nature and shape, used in various branches of industrial and civil construction as an energy-saving fireproof coating of pipelines of heating networks, equipment to protect personnel from contact burns with hot metal surfaces; as an anti-corrosion coating for cold water pipelines; for external thermal insulation of building facades, internal processing of rooms in order to prevent freezing of walls and surface damage by fungi, sealing and waterproofing walls, roofs, foundations, basements.

Known fireproof heat-resistant coating (US Pat. RU No. 2215765, IPC C04D 161/14, publ. 10.11.2003), obtained on the basis of polymer binders - phenolic-furfural-formaldehyde resin, a copolymer of vinyl chloride with acrylonitrile, epoxy Dianova resin, plasticizer - phosphpoliol, pore former - acetone, fillers - perlite, talc, mica, hardener - a solution of hexamethylenetetramine in aliphatic alcohol.

The disadvantages of the proposed coating are the use of a blowing agent, which leads to the formation of an open-pore system, which leads to increased water absorption during condensation of water vapor and, as a result, deterioration of heat-shielding properties, as well as the use of organic solvents that create a fire hazard in the manufacture and application of the proposed coating.

Known paint-coating heat and moisture protection (US Pat. RU No. 2310670, IPC C09D 5/02, C04B 111/20, publ. 20.11.2007). The paint-coating is made of a composition comprising the following ratio of components, wt.%: 20-30 binder, 10-30 hollow microspheres, the rest is an organic solvent. The binder is selected from the group consisting of organosilicon resin, acrylic (co) polymer, polyurethane. As hollow microspheres, ceramic or glass hollow microspheres with a size of 20-150 micrometers are used. The composition of the composition may additionally include titanium dioxide in an amount of 2-5 wt.% And a flame retardant additive in an amount of 5-25 wt.%.

The disadvantages of the proposed composition are the use of organic solvents (butyl acetate, acetone, ethyl acetate), which limits the range of application of coatings at facilities with increased fire hazard requirements (oil refining, transportation and storage of oil, chemical industry, military-industrial complex, etc.) and temperature limitation operation of paint-coating up to 200 ° C.

Known heat-insulating coating (US Pat. RU No. 2318782, IPC C04B 111/20, publ. 10.03.2008, bull. No. 7), made of a composition comprising components in a dry form: a binder - dry redispersible liquid glass or a mixture thereof cement, hollow microspheres, fillers.

The main disadvantages of the proposed thermal insulation coating are the need to prepare the composition immediately before application, since the previously prepared mixture during storage hardens. In addition, the coating may shrink if the drying conditions are not observed, which leads to cracks and delamination from the substrate.

The closest in technical essence is the anticorrosion and thermal insulation coating based on hollow microspheres (US Pat. RU No. 2251563, IPC C09D 5/02, C09D 5/08, publ. 05/10/2005) The coating is made from a composition comprising a polymer binder - 5 -95% and hollow microspheres - 5-95% vol. The polymer binder consists of a latex composition. Contains 10-90% vol. (co) a polymer selected from the group: acrylate homopolymer, styrene acrylate copolymer, butadiene copolymer, polystyrene, butadiene polymer, polyvinyl chloride polymer, polyurethane polymer, vinyl acetate polymer or copolymer or from a mixture. The binder also contains 10-90% vol. mixtures of water and surfactant.

The disadvantage of the described anticorrosive and heat-insulating coating based on hollow microspheres is its combustibility, high smoke formation when exposed to an open flame and low heat-shielding properties, susceptibility to the action of fungi and bacteria.

The technical task of the invention is the creation of an energy-saving anti-corrosion coating of reduced fire hazard, with high heat-shielding performance, with improved physical and mechanical properties that does not support combustion, has increased heat resistance (up to 400 ° C) and provides reliable anti-corrosion and fungicidal protection. The invention also relates to a method for producing a coating.

The technical result is achieved in that the composition forming an energy-saving anticorrosive coating with reduced fire hazard, including filler - closed flame-retardant glass hollow microspheres ZM from 30 to 110 microns in size, which are free-flowing powders with a bulk density of 0.10-0.15 g / cm ³ selected from the group consisting of hollow glass microspheres, hollow ceramic microspheres, hollow polymeric microspheres, hollow technological (ash) microspheres or mixtures thereof, titanium dioxide, latex further comprises SKD-1C synthetic brand, Acramos-101 and Akramos-402 acrylic dispersions selected from the group of aqueous dispersions of acrylate, butadiene, polyurethane, vinyl acetate, acrylate-styrene copolymers, styrene-butadiene copolymer, polyvinyl alcohol and mixtures thereof, fluralite ( nanopolytetrafluoroethylene) selected from the group of fluoropolymers of the brands Tomoflon, F32L, F26, F42, flame retardants - decabromodiphenyl oxide or dehsabromocyclododecane and aluminum hydroxide or ammonium polyphosphate, fungicide - polyhexamethylene guanidine phosphate, antifoam BYK-037, high selected from the series BYK-034, BYK-035, BYK-036, BYK-037, BYK-038, BYK-154, Penta-461, Penta-465 in the following ratio of components, parts by weight: synthetic latex of mark SKD-1C - 4.00-27.92, Acramos 101 acrylic dispersion - 32.00-55.20, Acramos 402 acrylic dispersion - 0.77-0.80, hollow glass microspheres ZM - 14.54-35, 86, fluralite (nanopolytetrafluoroethylene) - 1.00-6.20, decabromodiphenyl oxide - 4.80-7.00, aluminum hydroxide - 5.10-5.10, titanium dioxide - 0.70-1.20, polyhexamethylene guanidine phosphate - 0.22-0.24, defoamer BYK-037 - 0.32-0.35.

A distinctive feature of the proposed energy-saving coating with reduced fire hazard is the presence of a binder, which is a composition of a rubber water dispersion — synthetic latex SKD-1C, and Akramos 101 and Akramos 402 dispersions, which are copolymers of styrene and acrylic esters , fluralite (nanopolytetrafluoroethylene), polyhexamethylene guanidine phosphate, antifoam BYK-037 and a combination of flame retardants - decabromodiphenyl oxide, aluminum hydroxide with fluralite (nanopolytetraf Torethylene) providing fire resistance and a high level of thermal protection and heat resistance.

The combination of polymer and rubber dispersions increases strength, adhesion, elasticity, and cracking resistance of an energy-saving coating with reduced fire hazard.

Synthetic latex of brand SKD-1C GOST 11604-79 Omsk Rubber OJSC acts as a binder and is a polymerization product of butadiene with methacrylic acid in an aqueous emulsion using a biodegradable emulsifier - sulfanol NP-3. Latex SKD-1C increases the elasticity of the coating, adhesion and strength properties.

Acramos 101 Acrylic Dispersion (TU 2241-124-05757593-2000, Experimental Acrylic Dispersion Plant LLC, Nizhny Novgorod Region) also acts as a binder and is selected from the group of aqueous dispersions of acrylate, butadiene, polyurethane, vinyl acetate, acrylate copolymers with styrene, styrene-butadiene copolymer, polyvinyl alcohol and mixtures thereof.

Acramos 402 acrylic dispersion (TU 2241-005-55856863-2001 Experimental Acrylic Dispersion Plant LLC, Nizhny Novgorod Region) acts as an organic binder thickener. It is a copolymer of (meth) -acrylic monomers obtained by the emulsion method.

Functional filler - closed flame-retardant glass hollow microspheres of the ZM brand (Krylatsky Hills Business Park, Moscow). A mixture of glass hollow microspheres with zero water absorption creates a large volume of an isolated space inaccessible to water filled with rarefied gas and, as a result, high heat-shielding properties. The use of glass hollow microspheres gives the coating stability of heat-shielding properties when the coating is wetted.

Functional additives: decabromodiphenyl oxide (TU 6-22-43-79, CJSC Himeks), aluminum hydroxide (TU 6-47-107-88 rev. 1, CJSC Himeks), which are flame retardants, fluralite (nanopolytetrafluoroethylene) according to TU 2213-001-42515356-2005 is an ultrafine powder with low molecular weight. A feature of this material is the granule size of 100-500 nanometers. The effect of the use of this material is reflected primarily on such characteristics, fire and heat resistance, ductility. In addition, fluralite is inert to almost all chemicals and solvents, resistant to ultraviolet and atmospheric effects, does not absorb moisture.

Polyhexamethylene guanidine phosphate is available under the brand names Fogucid (TU 2499-001-00480136-95) and Fosfopag (TU 9392-007-415447288-99), is an effective fungicide and antiseptic. The effectiveness of fungicidal protection was determined in the laboratory of the Kazan Research Institute of Epidemiology and Microbiology. The fungicidal activity was established for the following fungi species: Aspergillus niger van Tiehem, Aspergillus terreus Thom, Penicillium funiculosum Thorn, Penicillium ochro-chloron Biourge, Paecilomyces variotii Bainier, Trichoderma viride Pers. ex Fr.

Auxiliary components: titanium dioxide (GOST 9808-84, CJSC Himeks), kaolin (GOST 19608-84, CJSC Himeks), gives the coating a reflective, aesthetic, cracking resistance, antifoam BYK-037 - a mixture of hydrophobic components and paraffin-based mineral oils with silicone content.

The advantage of the proposed energy-saving anti-corrosion coating with reduced fire hazard is the absence of organic solvents in its composition, heat resistance, low combustibility, fungicidal and antiseptic properties.

The invention is illustrated by the following examples.

Example 1

Organic binders are alternately introduced into the mixing device with constant stirring, then the functional filler, functional additives, auxiliary components are successively added. Stirring is carried out at room temperature until a homogeneous mixture is achieved.

The ingredients are added in the following order and ratio: synthetic latex SKD-1C - 4.00 parts by weight, Acramos 101 acrylic dispersion - 55.20 parts by weight, Acramos 402 acrylic dispersion - 0.77 parts by weight ., glass hollow microspheres ZM - 22.33 parts by weight, fluralite (nanopolytetrafluoroethylene) - 6.20 parts by weight, decabromodiphenyl oxide - 5.00 parts by weight, aluminum hydroxide - 5.10 parts by weight, dioxide titanium - 0.83 parts by weight, polyhexamethylene guanidine phosphate - 0.22 parts by weight, antifoam BYK-037 - 0.35 parts by weight

Example 2

According to the method specified in example 1, a composition is prepared comprising synthetic latex SKD-1C - 10.80 parts by weight, Acramos 101 acrylic dispersion - 37.00 parts by weight, Acramos 402 acrylic dispersion - 0, 77 parts by weight, glass hollow microspheres ZM - 35.86 parts by weight, fluralite (nanopolytetrafluoroethylene) - 2.00 decabromodiphenyl oxide - 7.00 parts by weight, aluminum hydroxide - 5.10 parts by weight, titanium dioxide - 0.90 parts by weight, polyhexamethylene guanidine phosphate - 0.22 parts by weight, antifoam BYK-037 - 0.35 parts by weight

Example 3

According to the method specified in example 1, a composition is prepared comprising synthetic latex SKD-1C - 16.98 parts by weight, Acramos 101 acrylic dispersion - 47.56 parts by weight, Acramos 402 acrylic dispersion - 0, 77 parts by weight, glass hollow microspheres ZM - 21.67 parts by weight, fluralite (nanopolytetrafluoroethylene) - 1.70 parts by weight, decabromodiphenyl oxide - 4.80 parts by weight, aluminum hydroxide - 5.10 parts by weight hours, titanium dioxide - 0.83 parts by weight, polyhexamethylene guanidine phosphate - 0.24 parts by weight, antifoam BYK-037 - 0.35 parts by weight

Example 4

According to the method specified in example 1, a composition is prepared comprising synthetic latex SKD-1C - 25.00 parts by weight, Acramos 101 acrylic dispersion - 32.00 parts by weight, Acramos 402 acrylic dispersion - 0, 77 parts by weight, glass hollow microspheres ZM - 26.86 parts by weight, fluralite (nanopolytetrafluoroethylene) - 1.98 parts by weight, decabromodiphenyl oxide - 7.00 parts by weight, aluminum hydroxide - 5.10 parts by weight hours, titanium dioxide - 0.70 parts by weight, polyhexamethylene guanidine phosphate - 0.24 parts by weight, antifoam BYK-037 - 0.35 parts by weight

Example 5

According to the method specified in example 1, a composition is prepared comprising synthetic latex SKD-1C - 27.92 parts by weight, Acramos 101 acrylic dispersion - 41.90 parts by weight, Acramos 402 acrylic dispersion - 0, 80 parts by weight, glass hollow microspheres ZM - 14.54 parts by weight, fluralite (nanopolytetrafluoroethylene) - 1.00 parts by weight, decabromodiphenyl oxide - 7.00 parts by weight, aluminum hydroxide - 5.10 parts by weight hours, titanium dioxide - 1.20 parts by weight, polyhexamethylene guanidine phosphate - 0.22 parts by weight, antifoam BYK-037 - 0.32 parts by weight

The finished composition is a homogeneous pasty mass. The composition is easy to use, easily diluted with water and can be applied to the surface with a brush, spatula, as well as mechanically. After application to the surface and drying, an energy-saving coating with a reduced fire hazard is formed. The thickness of the finished coating is from 1 to 5 mm, depending on the purpose.

Compositions for obtaining energy-saving coatings with reduced fire hazard are given in table 1.

Table 1 Component Name The content of the component, parts by weight Example 1 Example 2 Example 3 Example 4 Example 5 1 Latex synthetic SKD-1C 4.00 10.80 16.98 25.00 27.92 2 Acrylic dispersion "Akramos 101" 55,20 37.00 47.56 32.00 41.90 3 Acrylic dispersion "Akramos 402" 0.77 0.77 0.77 0.77 0.80 4 Glass hollow microspheres ZM 22.33 35.86 21.67 26.86 14.54 5 Fluralite (nanopolytetrafluoroethylene) 6.20 2.00 1.70 1.98 1.00 6 Decabromodiphenyl oxide 5.00 7.00 4.80 7.00 7.00 7 Aluminum hydroxide 5.10 5.10 5.10 5.10 8 titanium dioxide 0.83 0.90 0.83 0.70 1.20 9 Polyhexamethylene guanidine phosphate 0.22 0.22 0.24 0.24 0.22 10 Defoamer BYK-037 0.35 0.35 0.35 0.35 0.32

The results of comparative tests of energy-saving coatings with reduced fire hazard, made according to examples 1-5, are shown in table 2.

table 2 Parameter Value Test method Example 1 Example 2 Example 3 Example 4 Example 5 1 Contact thermal conductivity, W / m K 0,025 0.015 0.012 0.017 0,033 GOST 7076-78 2 Elongation,% fifteen 17 21 22 24 GOST 29088-91 3 Tensile strength, kg / cm ² 63 68 90 88 84 GOST 30244-94 4 Strength of adhesion to metal, kg / cm ² 6.2 6.3 6.2 6.4 7.2 GOST 26589-94 5 Adhesion to concrete, kg / cm ² 7.5 7.4 6.9 7.0 7.1 GOST 26589-94 6 Combustibility group G1 G1 G1 G1 G1 GOST 30244-94 7 Heat resistance, ° C 400 400 400 400 400 GOST 29088-91 8 Corrosion resistance of the coating Persistent Persistent Persistent Persistent Persistent GOST 9.403-80 method A 9 Fungicidal activity Active Active Active Active Active KNIIEM technique

The best results were obtained in the manufacture of coatings, the compositions of which are presented in examples 2, 3, 4. The declared limits of the content of organic binders are due to the fact that a decrease (example 1) or an increase (example 5) of the content of SKD-1C rubber dispersion leads to an increase in the coefficient thermal conductivity. Also, an increase in the content of fluralite (nanopolytetrafluoroethylene) (example 1) leads to the appearance of cracks in the coating and a decrease in elasticity.

The data obtained show that the energy-saving anti-corrosion coating with reduced fire hazard according to the invention has all the necessary complex of physical and mechanical properties and provides a high heat-protective, anticorrosive, fungicidal and fire-retardant properties to the protected surface.

Claims (1)

Energy-saving anti-corrosion coating of reduced fire hazard, including filler - closed non-combustible glass hollow microspheres 3M in size from 30 to 110 microns, which are free-flowing powders with a bulk density of 0.10-0.15 g / cm ³ , titanium dioxide, additionally contains SKD latex -1C, Acramos-101 and Akramos-402 acrylic dispersions, fluralite (nanopolytetrafluoroethylene), flame retardants - decabromodiphenyl oxide and aluminum hydroxide, fungicide - polyhexamethylene guanidine phosphate, antifoam BYK-037, with the following ratio and components in parts by weight .:
Latex grade SKD-1C - 4.00-27.92;
Acrylic dispersion "Acramos 101" - 32.00-55.20;
Acrylic dispersion "Acramos 402" - 0.77-0.80;
Glass hollow microspheres 3M - 14.54-35.86;
Fluralite (nanopolytetrafluoroethylene) - 1.00-6.20;
Decabromodiphenyl oxide - 4.80-7.00;
Aluminum hydroxide - 5.10-5.10;
Titanium dioxide - 0.70-1.20;
Polyhexamethylene guanidine phosphate - 0.22-0.24;
Defoamer BYK-037 - 0.32-0.35.