Anti-corrosion coating

 

(57) Abstract:

The invention relates to paint compositions intended for the removal of defects and protection from moisture primed or unprimed metal or non-metal surfaces. Filler paste consists of a pigment-filler, which is used as the aluminum powder in the amount of 10-20 wt.%, as a thickener impose a fine powder of zinc in the amount of 20 to 30 wt.% by weight filler paste as ethyl silicate binder uses the following composition, wt.%: ethyl silicate of 11,5 12,7, butyral 5,5-7,7, phosphoric acid (73%) 0,15-0,45, ethyl 72,1-76,5, water the rest. Putty is characterized by high adhesion and strength properties, resistant to cracking, suitable for removing small and large defects. 2 C.p. f-crystals, 1 table.

The invention relates to paint compositions intended for the removal of defects and protection from moisture primed or unprimed metal or non-metallic surfaces, and can be used to align the fine and gross lesions predominantly metallic material surfaces, car bodies, including unsaturated polyethyleneterephtalate resin, the monomer solvent is styrene, the initiator is benzoyl peroxide, accelerator - dimethylaniline, pigment - minium and zinc oxide, filler Aerosil and talc, styracaceae TPR, paraffin wax and the plasticizer is dibutyl phthalate (patent RU 2016029, IPC 09 D 5/34, 167/06, 1994).

Famous putty difficult to manufacture, environmentally hazardous and does not provide corrosion resistance during operation of the vehicle.

Known odnoupakovochnye filler for correction of defects in the metal and wooden surfaces, comprising a mixture of pigments and fillers in the environment acidsolitaire varnish (mark MC-006), environment polivinilhloridnyi resin in organic solvents with addition of plasticizer (brand HV 004), in the environment pentaftalevyh varnish with the addition of organic solvents (grade PF-002). [GOST 10277-90 "Filler"].

Widely known both supplied in two packages putty, used for metal and non-metal surfaces based on epoxy film-forming agent, which makes it possible to eliminate defects and to provide protection from moisture. Epoxy putty represent compactly the settlement of the epoxy resin in organic solvents, and functional additives - hardener. [GOST 28379-89 "Filler EP-0010 and EP-0020]. The filler used inorganic materials group - chalk, talc, mica, Aerosil, basalt dust in an amount up to 40 wt.%, as pigments used known inorganic pigments in an amount up to 10 wt.%.

Known fillers do not provide corrosion protection for metal surfaces, are toxic and flammable, characterized by low adhesion properties, the operation of the crack, forming cracks have enough high stability and require additional machining before applying primer or top coat.

Object of the invention is the creation of a stable lightweight filler paste with improved adhesive properties suitable for removing small and large defects, allowing to protect the surface from corrosion damage.

This object is achieved in that the filler consists of filler paste comprising a pigment-filler and binder, and the functional additive is a thickener, where the pygmies following ratio of components, wt.%:

Aluminum powder - 10 - 20

Ethyl silicate binder - Rest

and as a thickener use superfine powder of zinc in the amount of 20-30 wt.% by weight of the filler.

Ethyl silicate binder contains, wt%:

Ethyl silicate - 11,5 - 12,7

The butyral - 5,5 - 7,7

Orthophosphoric acid (73%) - 0,15 - 0,45

Ethyl alcohol is 72.1 - 76,5

Water - the Rest

As finely powdered zinc use of industrially produced powder brand PCVD (superfine zinc powder) obtained by evaporation of metallic zinc in an atmosphere of neutral gas (inert gas or nitrogen) with subsequent condensation. Superfine powder zinc has a particle of spherical shape with the following particle size distribution: particle fractions 4-12 μm is not less than 55 wt.%, particle fraction more than 20 μm is not more than 15 wt.%. Specific surface area of more than 0.15 m2/,

Ethyl silicate binder is produced in industrial scale by THE 6-10-1468-79 or THE 2311-019-12288779-99.

As the aluminum powder can be used commercially available aluminum powder such as aluminum powder pigment PAP-1, PAP-2, GOST 5494.

Aluminum powder and superfine powder of zinc are widely used in various paint compositions. In the inventive compositions they are used for a new purpose and perform a new function - aluminum powder is used as an active filler, and superfine powder of zinc as a thickener, allowing chemical structure of the obtained composition. Declare qualitative and quantitative composition provides new properties filler pastes and putties based on it - high anti-corrosion performance, the ability to handle vertical shallow defects, maintaining good indicators of physico-mechanical characteristics. All the above allows to make a conclusion on the compliance of the claimed invention, the criterion of "inventive step".

We offer the filler may be made of known materials, nylenna applicability".

The mechanism of structure formation filler paste is ensured by the properties of ethyl silicate binder, as well as the properties and shape of the powder particles of zinc and aluminum powder. When included in the ethyl silicate binder aluminum powder forms a stable colloidal structure representing interacting micelles formed by particles of aluminum, prisoners in ethyl silicate shell. Additional structuring of the system occurs due to a chemical reaction polysiloxanes containing reactive Oh-groups with metallic aluminum. In addition, the developed surface of the aluminum powder provides a relatively low content of filler in the paste to provide the desired viscosity (low yield) when the claimed ratio of components. Entered before applying the filler in the paste superfine zinc powder fits into the colloidal system of the aluminum pastes in the form of micelles containing as the core of the zinc particles. Different forms micelles with zinc and aluminum cores (spherical and flake respectively) provide a dense packing. In addition, the zinc powder in prisutstvie the film. The metallic nature of the pigments, and therefore, the chemical bond through chains polysiloxanes with the surface of the metal ensures the formation of a durable zinc-aluminum-iron-silikatnogo layer having good adhesion to metal surfaces and is resistant to water and solvents. Get the properties of the filler pastes and putties based on it provide the ability to resolve small vertical defects and defects with sharp edges. The resulting coating has the consistency of a paste which is easily applied with a spatula or brush directly into the defect with subsequent removal of excess filler with a spatula. The resulting filler layer is characterized by high adhesion to the treated surface, low shrinkage, optimal elasticity, resistance to cracking and cracking during operation, corrosion resistance. After drying of the applied putty to get the surface is rough, it is easy to grind without water, suitable for wyprawa the metal surface. Putty is characterized by increased resistance, i.e. can be applied to objects with operating temperatures not exceeding 150oC.
Ethyl silicate - 11,5 - 12,7

The butyral - 5,5 - 7,7

Orthophosphoric acid (73%) - 0,15 - 0,45

Ethyl alcohol is 72.1 - 76,5

Water - the Rest

The resulting composition is thoroughly mixed until a homogeneous paste. The obtained filler paste has a long shelf life, and filler paste has a limited capacity, i.e., it is recommended to be used for one shift (8 hours). The putty is applied with a spatula, filling. Putty can be used if necessary as a primer, in this case, it is possible to apply pneumatic dispersion upon dilution of filler to working viscosity ethyl alcohol or solvent 648.

The invention is illustrated by examples of specific performance.

Example 1 (invention)

In the ethyl silicate binder is injected with constant stirring under natural conditions aluminum powder in an amount of 10 wt.% by weight of the filler. Before applying gradually enter 20 wt.% finely powdered zinc brand PCVD, mix thoroughly before applying survive in rosok zinc brand PCVD - 20

Ethyl silicate binder - 70

Ethyl silicate binder contains, wt%:

Ethyl silicate - 11,5

Polyvinyl butyral is 5.5

Orthophosphoric acid (73%) - 0,15

Ethyl alcohol is 72.1

Water - 10,75

Characterization of putty it is applied with a spatula in one layer using a stencil. The resulting coating was tested according to GOST 10277-90. The data given in the table.

Example 2 (invention)

In the ethyl silicate binder is injected with constant stirring under natural conditions, aluminum powder (20 wt.% by weight of the filler. Before applying gradually impose a 30 wt.% finely powdered zinc brand PCVD, mix thoroughly before applying incubated for 20-30 minutes, the Coating has the following composition, wt.%:

Aluminum powder - 20

Superfine powder zinc brand PCVD - 30

Ethyl silicate binder - 50

Ethyl silicate binder contains, wt%:

Ethyl silicate - 12,7

The butyral - 7,7

Orthophosphoric acid (73%) - 0,45

Ethyl alcohol - 76,5

Water - 2,65

Characterization of putty it is applied with a spatula in one layer with ispolzovaniem stencil. The resulting putty and the e binder is injected with constant stirring under natural conditions, the aluminum powder in the amount of 15 wt.% by weight of the filler. Before applying gradually enter 25 wt.% finely powdered zinc brand PCVD, mix thoroughly before applying incubated for 20-30 minutes, the Coating has the following composition, wt.%:

Aluminum powder - 15

Superfine powder zinc brand PCVD - 25

Ethyl silicate binder - 60

Ethyl silicate binder contains, wt%:

Ethyl silicate - 12,1

The butyral - 6,6

Orthophosphoric acid (73%) - 0,30

Ethyl alcohol was 74.3

Water - 6,70

Characterization of putty it is applied with a spatula in one layer using a stencil. The resulting coating was tested according to GOST 10277-90. The data given in the table.

Example 4 (invention)

In the ethyl silicate binder is injected with constant stirring under natural conditions aluminum powder in an amount of 10 wt.% by weight of the filler. Before applying gradually impose a 30 wt.% finely powdered zinc brand PCVD, mix thoroughly before applying incubated for 20-30 minutes, the Coating has the following composition, wt.%:

Aluminum powder - 10

Superfine powder zinc brand PCVD - 30

Ethyl silicate binder - 60

Ethyl silicate tie>/BR>Ethyl alcohol was 74.3

Water - 6,70

Characterization of putty it is applied with a spatula in one layer using a stencil. The resulting coating was tested according to GOST 10277-90. The data given in the table.

Example 5 (invention)

In the ethyl silicate binder is injected with constant stirring under natural conditions, aluminum powder (20 wt.% by weight of the filler. Before applying gradually enter 20 wt.% finely powdered zinc brand PCVD, mix thoroughly before applying incubated for 20-30 minutes, the Coating has the following composition, wt.%:

Aluminum powder - 10

Superfine powder zinc brand PCVD - 20

Ethyl silicate binder - 60

Ethyl silicate binder contains, wt%:

Ethyl silicate - 12,1

The butyral - 6,6

Orthophosphoric acid (73%) - 0,30

Ethyl alcohol was 74.3

Water - 6,70

Characterization of putty it is applied with a spatula in one layer using a stencil. The resulting coating was tested according to GOST 10277-90. The data given in the table.

Example 6 (control)

In the ethyl silicate binder is injected with constant stirring in a natural zincavage powder brand PCVD, mix thoroughly before applying incubated for 20-30 minutes, the Coating has the following composition, wt.%:

Aluminum powder - 5

Superfine zinc powder brand PCVD - 25

Ethyl silicate binder - 70

Ethyl silicate binder contains, wt%:

Ethyl silicate - 12,1

The butyral - 6,6

Orthophosphoric acid (73%) - 0.3 to

Ethyl alcohol was 74.3

Water - 6,7

Characterization of putty it is applied with a spatula in one layer using a stencil. The resulting coating was tested according to GOST 10277-90. The data given in the table.

Example 7 (control)

In the ethyl silicate binder is injected with constant stirring under natural conditions, the aluminum powder in the amount of 30 wt.% by weight of the filler. Before applying gradually enter 25 wt.% finely powdered zinc brand PCVD, mix thoroughly before applying incubated for 20-30 minutes, the Coating has the following composition, wt.%:

Aluminum powder - 30

Superfine powder zinc brand PCVD - 25

Ethyl silicate binder - 45

Ethyl silicate binder contains, wt%:

Ethyl silicate - 12,1

The butyral - 6,6

Orthophosphorous spatula in one layer using a stencil. The resulting coating was tested according to GOST 10277-90. The data given in the table.

Example 8 (control)

In the ethyl silicate binder is injected with constant stirring under natural conditions aluminum powder in an amount of 10 wt.% by weight of the filler. Before applying gradually enter 15 wt.% finely powdered zinc brand PCVD, mix thoroughly before applying incubated for 20-30 minutes, the Coating has the following composition, wt.%:

Aluminum powder - 10

Superfine powder zinc brand PCVD - 15

Ethyl silicate binder - 75

Ethyl silicate binder contains, wt%:

Ethyl silicate - 12,1

The butyral - 6,6

Orthophosphoric acid (73%) - 0,30

Ethyl alcohol was 74.3

Water - 6,70

Characterization of putty it is applied with a spatula in one layer using a stencil. The resulting coating was tested according to GOST 10277-90. The data given in the table.

Example 9 (control)

In the ethyl silicate binder is injected with constant stirring under natural conditions, aluminum powder (20 wt.% by weight of the filler. Before applying gradually enter 35 wt.% finely powdered zinc Markov, wt.%:

Aluminum powder - 20

Superfine powder zinc brand PCVD - 35

Ethyl silicate binder - 45

Ethyl silicate binder contains, wt%:

Ethyl silicate - 12,1

The butyral - 6,6

Orthophosphoric acid (73%) - 0,30

Ethyl alcohol was 74.3

Water - 6,70

Characterization of putty it is applied with a spatula in one layer using a stencil. The resulting coating was tested according to GOST 10277-90. The data given in the table.

Example 10 (prototype)

Putty EP-0010-based epoxy resins. Epoxy putty was tested according to GOST 10277-90. The data given in the table.

As can be seen from the table, the composition of the proposed structure allows to obtain a coating with improved performance. With the introduction of filler paste of aluminum powder less than the claimed amount does not provide the necessary structure, when applying the putty off a vertical surface, and a thin layer while drying can receive holes, increases shrinkage. With the introduction in the inventive composition of the aluminum powder more than the claimed amount is formed a thick paste, which features the ing pasta finely powdered zinc less than the claimed amount is not provided required its density, making it difficult to obtain a continuous layer and, in addition, there is provided the protective mechanism of corrosion protection. With the introduction of finely powdered zinc more than the claimed amount is significantly increased curing rate, which complicates the process of applying putty, reduced adhesive properties, coating falls into defects.

The inventive coating has good strength properties. It allows to provide high-quality elimination of vertical defects of the metal surface and other surface defects, such as small size less than 2 mm, with torn edges. Putty has a low shrinkage, does not provide cracks while drying, has good elasticity, has a high adhesion to the surface and resistance to cracking during operation. Corrosion resistance in conditions of increased aggressiveness increases by 5-7 years.

1. Anti-corrosion coating, consisting of a filler paste and the functional additive is a thickener, with filler paste consists of a pigment-filler and a binder, wherein the filler paste as pigment-filler function is onenow, wt.%:

Aluminum powder - 10-20

Ethyl silicate binder - Rest

the thickener used superfine powder of zinc obtained by evaporation of metallic zinc in an atmosphere of inert gases or nitrogen with subsequent condensation, in the amount of 20-30 wt.% by weight of the filler.

2. Anti-corrosion coating on p. 1, characterized in that ethyl silicate binder contains, wt%:

Ethyl silicate - 11,5-12,7

The butyral - 5,5-7,7

Orthophosphoric acid (73%) - 0,15-0,45

Ethyl alcohol is 72.1-76,5

Water - the Rest

3. Anti-corrosion coating on p. 1, wherein the fine powder of zinc has a particle size distribution: particle fractions 4-12 μm is not less than 55 wt.%, particle fraction more than 20 μm is not more than 15 wt.%.

 

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