Method of obtaining lacquer coating mainly on arrow-shaped bullets

FIELD: chemistry.

SUBSTANCE: method involves cathodic electrodeposition from a water-base lacquer composition containing 60-70% solution in a mixture of ethylglycoacetate and butanol epoxyamino-rubber adduct modified with malamine-formaldehyde resin K-421-02, an organic acid and distilled water, and hardening the coating. The lacquer composition additionally contains 75-85% solution in toluene bis(dicresoxy-phosphine-oxy)dibutoxy titanium, with the following ratio of components in wt %: 60-70% solution in a mixture of ethylglycol acetate and butanol epoxyamino-rubber adduct, modified with melamine-formaldehyde resin K-421-02 - 1.6-11.0; 75-85% solution in toluene bis(dicresoxy-phosphine-oxy)dibutoxy titanium 0.008-1.1; organic acid 0.008-1.1; distilled water - the rest. Electrodeposition is carried out at voltage 60-200 V for 3-60 s.

EFFECT: designing a method of obtaining coatings mainly on arrow-shaped bullets, having high corrosion resistance in NaCl solution and enabling complete sealing of cartridges with anaerobic sealants.

3 cl, 1 tbl

 

The invention relates to the field of protective coatings waterborne materials on the elements of rounds of small arms ammunition (SSR), in particular on the bullet-swept shape, mounting the ammunition with which to seal the use of anaerobic sealants.

A method of obtaining coatings for steel liners using a water-soluble polymer polyorganosiloxane and a copolymer of butadiene with styrene (composition FPSM-51 TO-054-10964029-2005) [certificate of utility model RF 6441, IPC F42B 5/26].

The disadvantages of the protective coating obtained by this method is its low resistance to corrosion in 3% NaCl solution (not more than 8 hours before the appearance of signs of corrosion). The method of coating (dipping) does not allow to obtain a uniform coating on the bullets arrow-shaped form.

There is also known a method of applying a protective coating on the cartridge sleeve [patent RU 2313058, IPC F42B5/295, C23C22/12], in which the polymer layer is applied by processing liners in aqueous solution composition FPSM-51 (TU 2149-054-10964029-2005) and water-soluble modifiers for this composition on the basis of phenol-formaldehyde, epoxy, polyester or alkyd resins. The disadvantage of such coatings is also low corrosion resistance in 3% NaCl solution (not more than 9 hours until signs of corrosion). The method of application covered by the I (dipping) does not allow to obtain uniform coatings on the arrow-shaped form.

Closest to the invention to the technical essence is a method for protective coatings by the method of deposition of waterborne composition [patent RU 2226204, IPC 09D 119/00, 5/44], containing 60-70% solution in a mixture of ethylpyrazine and butanol, partially neutralized with formic acid epoxiconazole adduct modified melamine-formaldehyde resin, acetic acid, ethyl cellosolve, xylene, fluoroplastic f-40, universal offset ink 2523 and distilled water in the following ratio of components:

td align="left"> fluoroplast f-40
60-70% solution in a mixture of ethylpyrazine
and butanol,
partially neutralized with formic acid
epoxiconazole adduct modified6,5-12,5
melamine-formaldehyde resin
acetic acid0.5 to 1.2
the ethyl cellosolve1.5 to 3.5
xylene0.8 to 1.0
0.1 to 1.0
universal offset paint 25232.0 to 8.0
distilled waterrest

The disadvantages of this method include the fact that the availability of such coverage in places subject to sealing anaerobic sealants, leads to the fact that the sealing of the cartridges is less than 100%. If the isolate designated, subject to sealing, and coating on them do not apply, you can ensure 100% sealing of the cartridges, but in the process of mounting SSR in places where there is no coverage, there is corrosion, which is unacceptable in the manufacturing process of SSR.

The present invention was to provide a method for obtaining a coating mainly on the bullets arrow-shaped form having a high resistance to corrosion in 3% NaCl solution (not less than 72 hours), and provides 100% sealing cartridges anaerobic sealants.

This is achieved by a method comprising cathodic electrodeposition, using a composition containing 60-70% solution in a mixture of ethylpyrazine and butanol epoxiconazole adduct modified melamine-formaldehyde resin-To-421-02, bis(dictatorship.since)-dilutability as 75-85% solution in which oluwole, organic acid and distilled water in the following ratio, wt.%:

60-70% solution in a mixture of ethylpyrazine and
butanol epoxiconazole adduct,
modified melamine-formaldehyde
the resin-421-021.6-11.0
75-85% solution in toluene0.008-1.1
bis(dictatorship.since)dilutability
organic acid0.008-1.1
distilled waterrest

and the coating is applied by cathodic deposition at a voltage of 60-200 for 3-60 seconds.

The obtained coatings utverjdayut at a temperature of 190-210C (at temperatures below 190C. the coating is not cured at a temperature above 210C are chipped coating).

For experimental verification was prepared by the series of compositions, the results of five of them in the table.

In experimental work b is used:

is a water - borne resin EEC-M-2 (TU 2313-035-20939239-2008), representing (60-70)% solution in a mixture of ethylpyrazine and butanol epoxiconazole adduct modified melamine-formaldehyde resin-To-421-02;

- formic acid GOST 5848-73;

- 75-85% solution in toluene bis(dictatorship.since)-dilutability (stabilizer TF-3, TU 02-1-212-72);

- distilled water.

Compositions were prepared as follows: a waterborne resin EEC-M-2 under stirring was added 75-85% solution in toluene bis (dictatorship.since)-dilutability, formic acid and distilled water.

Bullet fully immersed in the composition and conduct cathodic electrodeposition at a voltage of 60-200 for 3-60 seconds.

Bullets coated washed artesian water (jet wash) and distilled water (dipping). Blew warm air (25-100C) and kept in a drying Cabinet at a temperature of 20010C) for 30-60 minutes

Sealing cartridges was carried out by anaerobic sealant "Anyterm-50" TU 2257-433-00208947-2004.

Sealing of the cartridges tested according to GOST In 18982-73.

Corrosion resistance was evaluated by constant immersion of the product in 3% NaCl solution until the first signs of corrosion.

The results are shown in the table.

From the table it follows that only savlon the second method of producing coatings (examples 2, 3, 4) provides 100% sealing of the cartridges and high corrosion resistance of the coatings.

Similar results were obtained when using as the organic acid is acetic acid.

Thus, it is experimentally shown that the solution of this problem can only be achieved if the claimed combination of features and when using these modes of deposition.

Table
no PPThe composition, wt.%The operating parameters of the coating by the electroplating methodTightnessCorrosion in 3% NaCl solution, h
U deposition InTime
160-70% solution in a mixture of ethylpyrazine and butanol epoxiconazole adduct modified melamine-formaldehyde resin-To-421-021.5It is impossible to prepare a waterborne composition, RA is the lamination solution
75-85% solution in toluene bis(dictatorship.since)dilutability0.002
Formic acid0.005
Distilled waterthe others
Noah
260-70% solution in a mixture of ethylpyrazine and butanol epoxiconazole adduct modified melamine-formaldehyde resin-To-421-021.6502For these modes, the electrodeposition coating is not formed
75-85% solution in toluene bis(dictatorship.since)dilutability0.008
Formic acid0.008
Distilled waterthe others
Noah
360-70% solution in a mixture of ethylpyrazine and butanol epoxiconazole adduct modified melamine-formaldehyde resin-To-421-021.6 603100%72
75-85% solution in toluene bis(dictatorship.since)dilutability0.008
Formic acid0.008
Distilled waterthe others
Noah
460-70% solution in a mixture of ethylpyrazine and butanol epoxiconazole adduct modified melamine-formaldehyde resin-To-421-022.014030100%168
75-85% solution in toluene bis(dictatorship.since)dilutability0.08
Formic acid0.04
Distilled waterthe others
Noah
560-70% solution in a mixture of ethylpyrazine and butanol is epoxiconazole adduct, modified melamine-formaldehyde resin-To-421-021120060100%168
75-85% solution in toluene bis(dictatorship.since)dilutability1.1
Formic acid1.1
Distilled waterthe others
Noah
660-70% solution in a mixture of ethylpyrazine and butanol epoxiconazole adduct modified melamine-formaldehyde resin-To-421-021121070Less than 100%168
75-85% solution in toluene bis(dictatorship.since)dilutability1.1
Formic acid1.1
Distilled waterthe others
Noah
760-70% solution in a mixture of ethylpyrazine and butanol epoxiconazole adduct modified melamine-formaldehyde resin-To-421-0212It is impossible to prepare a waterborne composition, stratify solution
75-85% solution in toluene bis(dictatorship.since)dilutability12
Formic acid12
Distilled waterthe others
Noah
SoE60-70% solution in a mixture of ethylpyrazine and butanol, partially neutralized with formic acid epoxiconazole adduct modified melamine-formaldehyde resin6,514030Less than 100%72
acetic acid0,5
the ethyl cellosolve5
xylene0.8
fluoroplast f-400.1
Universal offset paint 25232.0
Distilled waterthe others
Noah

1. The method of obtaining a varnish covering mainly on the bullets arrow-shaped form, including cathodic electro-deposition of waterborne lacquer compositions containing 60-70%solution in a mixture of ethylpyrazine and butanol epoxiconazole adduct, modified melamine-formaldehyde resin-To-421-02, organic acid and distilled water, and curing the coating, characterized in that the lacquer composition further comprises 75-85%solution in toluene bis(dictatorship.since)dilutability in the following ratio, wt.%:

60-70%solution in a mixture of ethylpyrazine and
butanol epoxiconazole adduct,
modified melamine-formaldehyde
with the Ola K-421-02 1,6-11,0
75-85%solution in toluene
bis(dictatorship.since)dilutability0,008-1,1
organic acid0,008-1,1
distilled waterthe rest,

when the electrodeposition is carried out at a voltage of 60-200 Within 3-60 C.

2. A method of obtaining a lacquer coating according to claim 1, characterized in that the organic acid is used formic acid.

3. A method of obtaining a lacquer coating according to claim 1, characterized in that the curing of the coating is carried out at a temperature of 190-210C.



 

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2 tbl, 4 ex

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20 cl, 28 tbl, 27 ex

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1 tbl

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1 tbl

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4 cl, 12 ex, 3 tbl

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2 tbl

The invention relates to the field of waterborne coatings obtained by electrodeposition at the cathode, and can be used to produce decorative coatings with high performance properties

The invention relates to the field of building materials and can be used as a protective and paint coating of building structures and buildings made of reinforced concrete, brick, slate, wood, etc

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Paint // 2153514
The invention relates to the field of building materials and can be used for finishing of construction products and building elements and structures

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SUBSTANCE: invention relates to latex-base composites used for making protective covers on polymeric materials, metal, wood, splint-slab and wood-fiber plates, concrete, ceramics, cardboard, paper and other materials. The composition comprises the following components, wt.-%: acrylate latex, 30.0-80.0; butadiene-styrene soft latex, 10.0-19.0; butadiene-styrene rigid latex, 5.0-9.0; filling agent, 12.0-21.0; pigment, 0.5-6.5; carbamide, 0.5-2.0; 10-50% alkali an aqueous solution, 0.1-2.0, and water, the balance. Invention provides preparing the cover that shows high stability under atmosphere conditions, climatic factors and wetting abrasion. The cover can be applied on materials by preliminary applying the composition by film layer on backing and the following thermal transfer of this layer from backing on surface to be covered.

EFFECT: improved, enhanced and valuable properties of composition.

2 tbl

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