SU732337A1 - Composition for preparing paint-varnish material - Google Patents

Description

one

The invention relates to compositions for paints and coatings, it can be applied in various sectors of the national economy, where the use of protective paints and varnishes is required.

Compositions for paint coatings are known, consisting of film-forming, pigment and stabilization. of a torus, for example, an oil paint containing 38.5 wt.% of drying oil, 60.2 Bed.% red lead iron and as a stabilizer - 0.3 wt.% lecithin (phosphatide concentrates). Due to the scarcity and high cost of lecithin 5, it is used in small quantities, which is ineffective 1.

The composition closest to the invention in terms of the result achieved is 1M, consisting of film-forming (solution of alkyd resin in solvent), pigments, filler and stabilizer 2.

The composition of paint weight. %: 25

Pentaphthalic varnish 70 Krrn. szintsy lemon 8.1 Sh1lory, 1.8

Pigment yellow iron oxide 8, 1 30

Talc11,1

AerosilO 9

Aerosil, which is pure silicon dioxide, which is poorly dispersed, is used as a stabilizer in the composition indicated. c is the finished product. Pigments and fillers in such a composition during storage form a dense, difficult to place sediment.

The purpose of the invention is to increase the sedimentation stability, i.e. the stability of the paint coating during storage by preventing the formation of precipitated pigments and fillers in ready-to-use paints.

The goal is achieved by the fact that the composition for obtaining paintwork material, including film-forming, pigment, filler, stabilizing additive and solvent, as film-forming contains a drying oil or alkyd resin, a stabilizing additive non-ionic surfactant

/, (-R-COOH-NJ) n

where C is Cjg alkyl; R - C, p - alkyl; p 1,2

in the following ratio of components, wt.%:

Film-forming 22,4-39,5 Pigment17,5-60,0

Filler 0.1-31.0

Stabilizing additive .0.3--3f5 Solvent Else This substance dissolves well in organic solvents and film-forming agents, is easily incorporated into paints and varnishes and does not require any structural changes in the technological scheme of their production. Getting it simple and based on non-deficient and inexpensive raw materials (examples 1, 2, 3).

Example 1. A stabilizing additive is obtained by condensation of the fraction of higher organic acids — C, L {produced by Shebekinsky and Volgodonsky chemical plants according to TU 38-10739-73) with a mixture of alkyl pyridines boiling at a temperature higher than 175 ° C, having an average molecular weight of 165 and ow byproduct of 2-methyl-5-ethylpyridine production. The molten mixture of higher organic acids is introduced into a round-bottom flask in the amount of 137.8 g (acid number 253.9 mg KOH), equipped with a stirrer, a reverse refrigeration unit, a thermometer and a dropping funnel. The flask is placed in an oil bath having a temperature of 80-100 ° C. When the bath temperature reaches the bath temperature, a fraction of alkyl pyridines in the amount of 100 g with a basic nitrogen content of 3.74% is gradually introduced into it. Alkylpyridines take an amount of equimolecular amount of loaded acids. After the introduction of alkylpyridines, the reaction mass is stirred for another 2 hours.

The resulting stabilizing additive is a condensation product containing mainly a dimer of the general formula

/. /, i - “- oHJ)

where R is C, C is C, g is alkyl;

 i -12 is bad;

I have a single eddy, physical and chemical

properties:

IjnoTHocTb. at 20 C, j- / M, 0.95

Viscosity at 50 ° С, cSt 110 Temperature is congealing, NIN, s12

Flash point, C 140 Auto-ignition temperature, C259 Example 2. Stabilizing

the additive is obtained by the interaction of the fraction of higher organic acids (produced by the Shebekinsky and Volgodonsk chemical plants according to TU 38-10739-73) with a mixture of alkylpyridines boiling at a temperature above 175 ° C, having an average molecular weight of 165 and a by-product of production 2- methyl 5-ethylpyridine. The method of preparation is the same as in Example 1.

The resulting stabilizing additive is a condensation product containing mainly a dimer of the general formula

/ I

l-r-coolh-lf

 - /

where R is elkil; R (-5 C.) alkyl;

having the following physico-chemical properties:

Density at 20 С,, 97

Viscosity at 50 ° C

cSt120

Pour point, Flash point, C 140 Auto-ignition temperature, ° C, 259

Example 3. A stabilizing additive is obtained by reacting the bottled synthetic fatty acids of the fraction-CqQ (produced by the Shebekinsky and Volgodonsk chemical plants according to TU 38-10739-73) with a mixture of alkylpyridines boiling up at a temperature higher, having an average molecular weight of 165 and being a by-product production of 2-methyl-5-ethylpyridine. The production method is the same as in Example 1.

The compound obtained is a condensation product, essentially containing a dimer of the general formula Rl-5

-R-COOH-W

where R is CgQ -Cqo-alkyl; S., Elkil;

having the following physico-chemical properties:

Density at 20 C, g / m

0.98

Viscosity at 90 ° C, cSt

116

Pour point

53

Flash point, C 169 Self-ignition temperature 60, C413

The stabilizing additive is introduced into paints and varnishes using a solvent (a mixture of xylene with white spirit in a 1: 1 ratio or xi65 lol with solvent in a ratio of llli

Example 4 Get the paint materials of the compositions, the recipe of which is given.

Ib table 1 (compounds 1 and 2 correspond to the known composition 1).

Table

Film-forming (linseed oil)

Pigment (Minium iron)

Solvent xylene: white spirit - 1: 1)

Filler (talc)

Stabilizer: lecithin

(-B-COOH-lQ

where R is -C, -alkyl

(-v-coooi W -),

Where. Rc ,, -ciq-alkyl

QE

where R-С;, (, -Ссп-alkyl

The resulting coatings are tested for sedimentation stability during storage. When storing the compositions according to recipes 1 and 2 (taken for comparison), delamination occurs for 5 months: a dense, hardly mixed sediment is deposited on the bottom, then a layer of a suspension of pigment in the drying oil and the top drying oil, not containing pigment.

When storing the composition according to the recipe, 3 at the bottom settles a small easyComponent 35.0 34.1 35.3 34.45 33.7 18.0 17.5 20.1 18.2 18.0

Filler (talc)

Solvent (Whitespirit)

39.5 37.3 38.8 39.5 37.0 60.0 60.0 59.0 58.0 59.0

0.1

1.8

0.4

0.1 0.1 0.1 0.1

0.1

0.3 3.5

0.3

2.0

3.5

stir the precipitate, then a layer of a suspension of pigment in the drying oil and the upper small layer - a layer of drying oil that does not contain pigment.

When storing the compositions according to formulations 3 and 5, there is no sediment on the bottom and a layer of pure drying oil.

PRI me R 5. Get paints and varnishes based on alkyd binder. Formulation formulations are given in table. 2

Table 2

Recipe composition, wt.%

four ,.

11.1 10.8 8.4 10.9 11.1 35.0 34.1 35.3 34.45 33.7

Stabilizer: Aerosil

SOSH-J)

(-in- i

where R is C, O is C, g is alkyl (—R — COOH-lf -)

where R is C, -alkyl i./l “-K-UNH

where R is a C-alkyl

 The compositions for paint and varnish coatings prepared according to Example 5 are checked for sedimentation stability during storage for six months. When storing the compositions according to recipes 1 and 2 (taken for comparison), separation occurs during 6 months. At the bottom, a solid, insoluble pigment and filler residue and a top layer of suspension are deposited.

When storing formulations according to formulations 3 and 4, no visual separation of paints and varnishes is observed.

Film-forming (glyphtal resin, modified with flax and tung oil) 24.9 22.4

Pigments (iron oxide and zinc white) 28.1

Filler (talc) 8.6 Solvent (solvent) 37.0

Stabilizer: Aerosil

 f Зг К1- 5

-B-COOH S 5,

where R-C) (j —Cj is alkyl

((UN.)

where., -Slp-alkyl

/. "1m

-TR-COOH-W},

where R-Cjj, -Scd-alkyl

Continued table. 2

0.9 3.5

3.5

2.0

0.9

25 sediment of pigments and fillers 6 is not present, the upper layer has a slightly lower viscosity than the viscosity of the lower layer.

When storing the composition according to Formula 5, there is also no sediment, on top there is a slight layer of varnish that does not contain pigment.

Example Paint materials based on alkyd (glyptal resin) modified with flax and tung oils are obtained. The formulation of the compositions are given in table. 3 Table 3

27.5 27.4 26.8

1.4

1.4

3.5

2.0

The compositions for paint and varnish coatings prepared according to Example 6 are checked for sedimentation and stability during storage for 3 months. After the specified period, the compositions according to recipes 1 and 2 are exfoliated:

Film-forming (linseed oil)

Pigments (chromium oxide and

zinc white)

Filler (ground barite)

Solvent (xylene)

Stabilizer: lecithin.

| -1 .- “wasps, n.).

where K-SSC-C, b-alkyl

The paint coating compositions prepared according to Example 7 were tested for sedimentation stability during storage for 2 months. After the expiration of the indicated period, the composition according to recipe 1 stratifies: a deposit of pigments and a filler falls to the bottom, the composition according to recipe 2 after 2 months of storage remains stable.

Thus, the introduction of paints as a stabilizing additive to the product of the interaction of vat FFAs with an alkyl alcohol mixture is the same after aging for 120 h.

at temperature, С .20 0.16 0.16 0.21-0.41

From gi 5, mm

The strength of the film on impact, kGS, cm

Moisture resistance (time before the appearance of corrosion), days

a dense sediment of pigments settles on the bottom. In the compositions according to formulations 3, 4 and 5, there is no sediment at the bottom.

Example 7. Get paint materials, the formulation of the compositions of which are given in table. four.

Table 4

35.4 31.5

31.0 0.1

2, .o

Readin leads to a significant increase in the sedimentation stability of paints and varnishes, eliminates deposition of pigments and filler and significantly improves the quality of the finished product. In addition, several improvements are improved, dispersion of pigments and fillers is accelerated, there are no lumps of dry pigments.

I In tab. 5 shows the main physicomechanical properties of the proposed and known compositions.

Table

120 0.38 0.41 0.56-0.61

1 50

1 50

1 50

thirty

Claims (2)

1. Oil on MA-15 paint, GOST 10503-71. 2. Paint PF-1123 TU 6-10-113-71 (prototype).