Composition for coating

 

(57) Abstract:

The invention relates to the field of paints and varnishes based on synthetic binders, used in obtaining protective coatings. Describes a method of obtaining a pigment, including filtration, drying, calcination. It lies in the fact that the pigment produced from the sludge water by decantation, filtration, drying at 100°C for 6 h and Prokaeva at 760°C for 1 h also Describes a composition for coating. The technical result of the invention is the removal of sediment, reduction of time of milling, as well as the rational use of precipitation processes of water treatment. 2 S. p. f-crystals, 1 table.

The invention relates to the field of paints and varnishes based on synthetic binders, used in obtaining protective coatings.

Known compositions based on vegetable oils, alkyd resins containing as pigment oxide Fe(III) and used to obtain protective coatings for metal (Belenky E. F., Raskin I. C. Chemistry and technology of pigments. - Leningrad: Khimiya, 1974).

However, the low quality of the coatings due to the rapid aging and a significant RA the God of the claimed invention to the technical essence and the achieved result is primed, representing a solution waste lacquers, selected from the baths of hydro filters paint industries, and the pigment (Styryl C. P., Goldman M,, Morozova N. P. and other processing Site of paints and varnishes //Paint-and-lacquer materials and their application. in 1986, No. 4, S. 57-58).

Disadvantages primers are precipitate formation during storage, a significant amount of time preparing compositions.

An object of the invention is the removal of sediment, reduction of time of milling, as well as the rational use of precipitation processes of water treatment.

This object is achieved in that in the method of producing pigment, including filtration, drying, calcination, what's new is that the pigment produced from the sludge water by decantation, filtration, drying at a temperature of 100oC for 6 hours and calcination at a temperature of 700oC for 1 hour.

In compositions for coatings, including waste polymer nitrocellulose lacquer selected from the baths of hydro filters paint industries, solvent R-4, containing in wt.%: butyl acetate - 12, acetone - 26, toluene - 62, pigment, what's new is that as a pigment it contains PR is%:

The waste polymer is nitrocellulose lacquer - 20-30

The solvent R-4 - 55-60

The product obtained by modification of sludge treatment is 15-20

The pigment obtained from the precipitation processes of water treatment. Technology of production includes the following stages: selection of the sludge treatment method decanting the suspension of hydroxide Fe (III); the separation of iron hydroxide by filtration; drying the selected sediment at the 100oC for 6 h; the course of annealing at 700oC for 1 h

The pigment composition, wt.%:

Fe2O3- 95-97

Mn2+- 2-3

Impurity - Rest

Physico-chemical characteristics of the obtained pigment:

Particle size, microns - 0,1-0,3

Loss on ignition, wt.% - 1,9

Humidity, % - 0,2

Water-soluble substances, wt.% - 0,3

Aqueous extract PH of 5.5 to 6.0

Bulk volume, cm3/g - 0,191

The oil absorption, g/g - 21-25

Sieve residue, wt.% - 0,1

Technical solutions, the properties of which would coincide with the properties claimed, was not found, therefore the proposed solution meets the criterion of "substantial differences".

Implementation of technical solutions will reduce the milling time and increase the COP, prepared composition.

Example 1. 30 g of waste polymer nitrocellulose lacquer dissolved in 60 g of solvent P-4 and add 15 g of the pigment. The composition of the fray in a ball mill until the desired degree of milling. The resulting composition is poured into the cylinder and examined by a standard method on the storage stability.

Example 2. Analogously to example 1 are dissolved in 35 g of waste polymer nitrocellulose lacquers in 55 g of solvent R-4 and add 13 g of pigment.

Example 3. Analogously to example 1 are dissolved 25 g of waste polymer nitrocellulose lacquers in 60 g of solvent R-4 and add 9 g of pigment.

Example 4. Analogously to example 1 are dissolved in 30 g of waste polymer nitrocellulose lacquers in 60 g of solvent R-4 and add 18 g of pigment.

Example 5. Analogously to example 1 are dissolved 25 g of waste nitrocellulose lacquer in 60 g of solvent R-4 and add 20 g of pigment.

Example 6. Analogously to example 1 are dissolved 25 g of waste nitrocellulose lacquer in 60 g of solvent R-4 and add 22 g of pigment.

The test results of the paint composition given in the table.

The test results of the paint composition shown in the table, with the th its stability during storage. Application of the pigment from sludge treatment provides an opportunity to expand the range of pigments used for the preparation of paint compositions, not inferior in quality serial samples, to reduce the harmful effects of solid waste on the environment through recycling. The use of the proposed composition will allow qualified to dispose of tons of waste water treatment that are currently being disposed in landfills.

Analysis of the results shows that the introduction of the pigment composition of precipitation water treatment does not affect the hardness and opacity of the composition and allows you to reduce the milling time by 50% and increase its stability during storage at 30%.

1. The method of producing pigment, including filtration, drying, calcination, characterized in that the pigment is obtained from the sludge water by decantation, filtration, drying at 100oC for 6 h and Prokaeva at 700oC for 1 h

2. Composition for coatings, including waste polymer nitrocellulose lacquer selected from the baths of hydro filters paint industries, solvent R-4, containing, wt.%: butyl acetate - 12; acetone - 26; toluene-the ka treatment under item 1, in the following ratio, wt.%:

The waste polymer is nitrocellulose lacquer - 20 - 30

The solvent R-4 - 55 - 60

The product obtained by modification of sludge treatment - 15 - 20

 

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SUBSTANCE: the invention is pertaining to the field of metallurgy, building industry, varnish and paint industry, in particular, to the method of production of a red ferrioxide pigment. A ball mill is charged with industrial water, loaded with iron oxide with concentration of 500-900 g/dm3, poured with a neutralizing agent in the amount ensuring pH 6 ÷ 10. The iron oxide is formed at a thermal decomposition of the hydrochloride solutions used at etching treatment of carbon steels. As a neutralizing agent it is possible to use caustic soda, a slaked lime, microcalcite. The suspension is pulped for 3-5 hours, put in a reactor with a stirrer, where it is washed out with formation of a suspension, filtered off and dried. The target product has the following parameters: pH 5 ÷ 8; the share of water-soluble salts - 0.02-0.03 %; dispersing ability - 27-30 microns; hiding power - 6 ÷7 g/m2. The invention allows to simplify process and to upgrade parameters of the pigment.

EFFECT: the invention allows to simplify process and to upgrade parameters of the pigment.

2 cl, 1 tbl, 1 ex

FIELD: pigment technologies.

SUBSTANCE: invention is intended for use in varnish-and-paint industry and in rubber and plastics production. Red iron oxide pigment preparation comprises: oxidation of aqueous solutions of ferric sulfate or suspensions of ferric hydroxide with air oxygen at quasi stationary temperature and pH values of reaction medium; hydrothermal heat treatment of suspension of ferric oxyhydroxides in periodical or continuous regimes in autoclaves; washing-out of pigment from water-soluble salts; drying and grinding of the pigment. During hydrothermal heat treatment FeOOH suspension is affected by nanosecond electromagnetic pulses having following characteristics: pulse duration 0.5-5 ns, pulse amplitude 4-10 kv, pulse repetition frequency 200-1000 Hz. Process is carried out at 130-200°С.

EFFECT: lowered FeOOH suspension hydrothermal heat treatment temperature and increased pigment preparation productivity.

1 tbl, 12 ex

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EFFECT: the invention ensures the increased purity of the produced ferric oxides and productivity at their production.

9 cl, 12 ex

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23 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: natural mechanically milled iron (III) oxide of lamellar structure at least 50 wt %, preferentially 75 wt %, contains particles sized 10 mcm and less in amount, at least, 50 wt %, preferentially 70 wt %, particularly preferentially 90 wt %. The ratio of thickness to maximum diametre of iron (III) oxide plates is 1:5, preferentially 1:10. To produce such iron (III) oxide, it is mechanically milled in an impactor or a jet-type mill. Iron (III) oxide resulted from mechanical milling, is separated by size grade, e.g. by an air separator. Iron (III) oxide can be used in lacquering for a base corrosion protection, mechanical load protection, UV and IR protection, for decorative coating, and also as an extender for polymeric and ceramic materials.

EFFECT: possibility to prepare highly dispersed lamellar particles of natural iron oxide.

15 cl

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