Erosion resistant, weatherproof, trudnosgoraemye multilayer material

 

The invention relates to technology of polymers and can be used to repair damaged areas of paint coating products for the aviation industry, in shipbuilding, the automotive industry and mechanical engineering. The material includes a polymer film on the inner surface where the adhesive layer constituting the adhesive with a constant viscosity with shear strength not less than 2.0 kg/cm2based strazdeliai elastomers with mass styrene content of 12-20% and molecular weight of 110-180 thousand and anti-adhesion layer as a protective paper or film, and on the outer surface of the polymer film is a multilayer lacquer coating on epoxy, acrylic, fluoropolymer or organofluorine basis. Polymer film made of a polymer selected from the group comprising polysulfone, polyurethane, polyvinyl chloride or fluoride-containing organic polymer, and the ratio of the layers of the paint coating, the polymer film and the adhesive layer is(0,5-1):1:(0,5-1). The material is resistant to the harsh environment of dust erosion and aerodynamic and hydrodynamic flows at the speed of take-off and landing, passenger and transi used to repair damaged surfaces of the airframe. The proposed material allows you to quickly repair refinishing in the field of environmentally friendly and energy efficient technologies to reduce labour costs for the repair of at least 50% and reduce the time to repair dozens of times. 2 C.p. f-crystals, 2 tab.

The invention relates to the production technology of materials based on polymers and can be used for repair, including in the field, damaged areas of the outer surface of the airframe.

Known multilayer material comprising a polymer film, adhesive layer, a release layer and a layer of fiberglass, consisting of several layers of glass cloth impregnated with thermosetting resin, in which the adhesive and antiadhesive layers arranged in series on the inner surface of the laminate, and the outer surface is a polymer film. The material is used to repair internal unloaded structures of the aircraft (U.S. Patent No. 5424105).

The disadvantage of this material is that it cannot use for external works, in particular for repair of damaged areas of the outer surface of aviation products is PPI, including polyester, polypropylene and polyvinyl chloride; metal layer, the adhesive layer made based on acrylic dispersion, and anti-adhesive paper, in which the adhesive and antiadhesive layers arranged in series on the inner surface of the material, the film is an outer layer and a metal layer and an additional modifying layers are located between the film and the adhesive layer. (Patent RF №2134200).

The disadvantage of this material are low erosion resistance, low resistance, high Flammability.

The closest analogue adopted for the prototype, is a multilayer film material consisting of a substrate comprising two or more polymer films such as polyvinyl chloride, polyester, polyimide, polyamide, polyethylene, polypropylene, polycarbonate or PTFE, interconnected in one way or another, an adhesive layer, a release layer in the form of protective paper or film, as well as decorative, decoration and other layers are applied sequentially in the manufacture of the film base. As the adhesive layer using adhesives, the long-term preserving stickiness due to the introduction in ionitriding rubber (D. F. Kagan, V. E. Gul, L. D. Samarin “multi-Layered composite film materials”, M.: Chemistry, 1989, S. 146-147).

Multilayer material prototype is only used as a decorative finishing material and cannot be used as a material for repair of aircraft, as they do not have sufficient complex properties, such as high erosion resistance and weather resistance, low Flammability, and it is not workable under cyclic impact of variable temperatures (-60+80)And in conditions of aerodynamic and hydrodynamic flows.

The technical task of the invention is the creation of erosion resistant, weather resistant, nonflammable multilayer material, working under cyclic impact of variable temperatures (-60+80)And in conditions of aerodynamic and hydrodynamic flows.

The goal of the project is achieved by the fact that the proposed erosion resistant, weatherproof, trudnosgoraemye multilayer material comprising a polymer film on the inner surface of which are adhesive layer made is containing a series of elastomers with a mass fraction of styrene 12-20%, molecular weight 110000-180000 and anti-adhesion layer as a protective paper or film, and on the outer surface of the polymer film is a multilayer lacquer coating on epoxy, acrylic or organofluorine basis.

Polymer film made of a polymer selected from the group comprising polysulfone, or polyurethane, or polyvinyl chloride or fluoride-containing organic polymer, and the ratio of the layers of the paint coating, the polymer film and the adhesive layer is(0,5-1):1:(0,5-1).

Multilayer material according to the invention is resistant to harsh conditions of dust erosion and aerodynamic and hydrodynamic flows at the speed of take-off and landing of passenger and transport aircraft, resistant to cyclical effects of variable temperatures (-60+80)With-and atmosphere and can be used to repair damaged surfaces of the airframe.

In addition, the inventive multilayer material combines both protective (erosion resistance, weather resistance) and decorative properties as multi-layer lacquer coating of the material with the introduction of suitable pigments provides the same color consists of 1 layer of primer (or not) and 2-3 layers of enamel. The maximum total thickness of the paint coating may be 85 microns. In the examples according to the invention were used primer EP-0104 (TU 6-10-1124-95) and the following enamel: EP-140 (GOST 24709-81) epoxy-based, AK-1115 (TU 6-10-1029-88) acrylic-based and enamel on organofluorine basis: VE-46 (TU 1-595-9-273-88) - based fluoropolymer resin and HT-5185 (TU 6-10-1934-88) based on fluoro.

As the polymer film using film thickness 35-85 mm.

As the adhesive layer in the examples according to the invention is used adhesives with a permanent tack and shear strength not less than 2.0 kg/cm2based strazdeliai elastomers such as butadiene-styrene or isoprene-styrene, with a mass fraction of styrene 12-20% and a molecular weight 110000-180000. In addition to these elastomers, adhesives target additives and solvents.

The thickness ratio of layers of paint (LCP):

polymer film: adhesive layer varies depending on the conditions under which the products of aviation technology and is determined by the technology of application layers, but the best technical result, i.e. the combination of the most high erosion resistance, weather resistance and Flammability is achieved when the ratio of LCP layers: the key BS-1-95 with a density of 95 g/m2(THE 5433-005-12963867-98) or BS-1-80 with a density of 80 g/ m2and siliconized Mylar film (THE 5459-003-34911995-98).

Examples of the implementation of

Example 1.

On polysulfone film thickness of 80 μm by the sputtering technique is applied multilayer paint coating thickness of 40 μm. Paint coating includes 1 coat of epoxy primer EP-0104 (TL6-10-1124-95) and 2 coats of enamel HT-5185 (TU 6-10-1934-88) based on fluoro. After application of each intermediate layer is implemented by its drying. After complete drying of the paint coating on the inner side of the surface film applied adhesive layer thickness of 40 μm, which represents an adhesive with a permanent tack and shear strength of 2.8 kg/cm2based strazdeliai elastomers with a mass fraction of styrene and 12%, molecular weight of 140000. The damages of the adhesive layer is rolled adhesive layer in the form of anti-adhesive protective paper brand BS-1-95. The ratio of thickness of the paint layer, the polymer film and the adhesive layer is 0.5:1:0.5 in.

Multilayer material according to examples 2, 3, and 4 receive analogously to example 1 (example 3, the primer layer is absent). Types of paint and varnish products, tapes, adhesives, thickness of layers and their ratios are given in table.1.

The materials made with the and, erosion resistance, Flammability.

Comparative performance of the proposed multi-layer material and the material of the prototype are given in table.2.

To determine weather the materials were subjected to atmospheric aging in subtropical climates and average climatic zone. We determined the limit of shear strength before and after aging.

Erosion resistance was evaluated by the weight loss (g) and studied the change of the surface wear under a microscope.

Determination of Flammability conducted on vertical samples, the exposure time 60 sec.

As can be seen from the data given in table.2, the proposed material is superior to the material prototype in weather resistance, erosion resistance, has a lower Flammability and higher resistance to cyclic action of temperatures (-60+80)C and in conditions of aerodynamic and hydrodynamic flows.

The proposed material allows you to quickly repair refinishing in the field of environmentally friendly and energy efficient technologies to reduce labour costs for the repair of at least 50% and reduce the time to repair dozens of times. In addition, the proposed material Motorala inventions

1. Erosion resistant, weatherproof trudnosgoraemye multilayer material comprising a polymer film on the inner surface of which are consistently located adhesion layer, which is made on the basis of glue with a constant viscosity with shear strength not less than 2.0 kg/cm2based strazdeliai elastomers with a mass fraction of styrene 12-20%, molecular weight 110000-180000, and anti-adhesion layer as a protective paper or protective Mylar film, and on the outer surface of the polymer film is a multilayer lacquer coating on epoxy, acrylic or organofluorine basis.

2. Erosion resistant, weatherproof trudnosgoraemye multilayer material under item 1, in which the polymeric film is made of a polymer selected from the group of polysulfone, or polyurethane, or polyvinyl chloride, or fluoride-containing organic polymer.

3. Erosion resistant, weatherproof trudnosgoraemye multilayer material on PP.1 and 2, in which the thickness ratio of the layers of the paint coating, the polymer film and the adhesive layer is(0,5-1):1:(0,5-1).

 

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