SU933659A1 - Process for producing stabilizer for polyvinyl chloride - Google Patents

Description

(5TH WAY OF OBTAINING A STABILIZER FOR POLYVINYL CHLORIDE

The invention relates to an improved method for the preparation of a stabilizer of polyvinyl chloride, which is a mixture of complex salts of carboxylic acids Cg - and metals of the second group of the Periodic System. A known method for the preparation of a stabilizer for polyvinyl chloride by reacting stearic or synthetic fatty acids C-y - Cn with neutralizing agents-metals or their oxides or hydroxides or their salts in the presence of a plasticizer-dibutyl phthalate at 60 - 200 ° C at a molar ratio of the corresponding acid and neutralizing agent and plasticizer equal to 1: 0.5 or 2: 0.6: 1.5 1. The disadvantage of this method is that complex salts containing up to 70% of coarse particles with a size of 100 microns are obtained in the process, wh greatly reduces the stabilizer deteriorates the quality and subsequent processing of polyvinyl chloride. The closest technical solution to this problem is a method of obtaining a stabilizer for polyvinyl chloride by reacting a mixture of oxides or a mixture of oxides and hydroxides of metals of the 2nd group of the Periodic System with C Q - carboxylic acid fractions at 60–130 ° C in the presence of a mixture of dioctyl phthalate, glycerin and triethylene glycol ether and phthalic and maleic acids, followed by distillation of the resulting water. Zinc, cadmium, lead, calcium, barium hydroxide 2 oxides are used as mixtures of oxides or oxides and hydroxides of metals of the 2nd group of the Periodic System. The disadvantage of this method is the low quality of the product due to the low dispersion of the stabilizer, the duration of the synthesis (up to 175 min) .

as well as the complexity of the stage of distillation of the water formed.

The aim of the invention is to improve the quality of the target product and simplify the process.

This goal is achieved by the proposed method of obtaining a stabilizer for polyacrylic chloride by reacting a mixture of oxides or oxides and a metal hydroxide — zinc oxide, barium, lead, barium hydroxide, calcium, with C 5 CnQ carboxylic acid fractions at B – PO C in the presence of an alkyl benzene sulfonic acid calcium salt. A distinctive feature of the proposed method is that the process is carried out in the presence of alkylbenzenesulfonic acid calcium salt, Gj - fractions are used as carbonic acid fractions, and cadmium oxides, zinc, as the mixture of oxides or oxides and metal hydroxide,%

Fractions up to 3 / Fractions up to 10

fractions up to 25 / u.

Fractions up to 50

Dilitity of synthesis, min

,

SCS consumption per 100 mah. PVC us.ch.

Thermostability in artificial leather compositions, min:

monolithic performance

at 180 ° C

in porous design

at 170 ° C

The magnitude of the increase in the thickness of the-porous layer

ri, lead, barium hydroxide, calcium. In the process, the salt of alkyl benzene sulfonic acid is used according to TU 6-01-9597 of the average empirical formula:

(, H4, SOj) (Ca with a molecular weight of 700, which is a mixture.

The proposed method allows to improve the quality of the target product for

by obtaining a highly dispersed stabilizer with a particle size of up to 3 / 80-85, in the known method, simplify the process by reducing the synthesis time to 130 minutes

80-85 5-10 The rest

120-150 1.5

76 94

118-121 vs. 175 minutes in a known way. while at the same time simplifying the water distillation stage by the azeotrope water isobutanol. . The table shows the compositions of complex complex stabilizers by the known and proposed methods and their properties in the compositions.

Pore characterization

Preparation (weighing, shifting and grinding with plasticizers and other liquid additives) of target additives (powders, pigments, fillers) in the production of artificial leather

Dust additives in the preparatory department

Intensification of the technological process of PVC-polyvinylchloride production Example 1. Preparation of a complex stabilizer of a porous layer artificial ratio of barium salts of 1.5: 1.0: 0, T5). Composition of loaded components: Carboxylic acids (FFA, (fraction)) Oxides, metal hydroxides (cadmium oxide, zinc oxide, barium hydroxide, eight-hydrous) Additives: Calcium salt alkyl benzene sulfonic acid (ABSC), solution in isobutanol Synthetic fatty acid of fraction C (target addition Summarized

Uniform fine-grained porous structure

Missing

Required

Present None The total reaction equation for the salt formation is: B, b CHj (CH) COOH +1 VO (OH}, - 8 HjO CdO + 0.5 ZnO, (CH) „COO, CHj (CH) nCOOJ Cd 0, (CH,. N6 , where p. 8-11. 8 centrifugal mixer type MKU with a capacity of 200 l, equipped with an effective mixing and jacket for heating the vapor or cooling with water, a reverse and direct cooler with a phase separator, from the measuring device 1 load kg (0.225 kg-mol) synthetic fat Acids of Cjft (acid number 275 mg / KOH), include stirring, and from mernik 2 add 32.0 kg of the calcium salt alkyl benzene sulphonic acid (ABSC). the mixer jacket is supplied with steam, the mass temperature is raised to 80-90 C, and at this temperature 0.53 kg C0, kg-mol) of zinc oxide and 5.55 kg (0, ОЙ25 kg-mol) of cadmium are loaded into the mixer through autoweights. Due to the reaction, the temperature of usy rises by 5. After the heating is stopped by steam injection into the jacket, the temperature of the mass is raised to PO-120 ° C and allowed to wait until the reaction mass has cleared, which indicates the completion of the formation of zinc and zinc. Then, without stopping the stirring, the temperature is set at 75 ° 80 ° E in the mixer, 20.9 kg (0, mol) of eight-water barium hydroxide are charged. After 5-15 minutes, the temperature of the mass rises by 5-10 ° C, foaming is possible. After the self-heating is completed, steam is added to the mixer jacket, the mass is heated to 90-100 and the reaction water is distilled off with a water-isobutanol azeotrope, the water in the phase separator is separated, and the isobutanol is returned to the mixer. After completion of the distillation of water, a sample is taken and an acid number is determined (not higher than 3 kg KOH / H and a moisture content not exceeding 2). With a positive analysis, from Mernik 3, 26.0 kg of the synthetic fatty acid melt of the Cn fraction are loaded and stirring is continued until a homogeneous mass is obtained. The finished product is a cream colored uniform paste. Output quantitative kg. The total synthesis time is 2–2.5 m. Composition of the ACL, wt.%: Comp |) badium-cadmium-zinc and synthetic fatty acids fraction of the C Q C fraction (molar ratio of salts, respectively, 1.5: t, 0: 0.15 ) 50.6 Alkylbwolzol: calcium ulfonat fABCK) 27.0 Synthetic fatty acid fraction SP-CHO22.4. The results of the analysis: Found,%: BA 7.32; Cd 4.15; Zn 0.37; Ca 1.38. Vmisleno: Ba 7,5b; Cxi t, 03; Zn 0.35; Ca 1.923 Acid number mg KOH / g. Dispersity of salts,% (determined on an MBI microscope with the help of an ophthalmic eyepiece): Fraction up to 3jU-82 Fraction 5-IOyU-7 Fraction up to 25 / Primary Example 2, Preparation of a complex complex stabilizer for artificial leather and film materials In a monolithic design ( the molar ratio of bari-cadmium-zinc salts is 1.5: 1.0: 0.15 respectively), the composition of the loaded components, wt.%: Carboxylic acids (FFA fractions, -C) 37.1 Oxides, metal hydroxides (cadmium oxide, zinc oxide, barium hydroxide eight-water) 21.7 Additives: Calcium alkyl benzene sulfonate (ABSC) or Enzay 8.0 Dioctylphthalate (salt formation activating additive and target additive) 27.0 Synthetic fatty acid fractions (lubricant) 6.2 The total reaction equation is given in example 1. A 200 l centrifugal blender from the meter 1 is loaded kg ( 0.225 kg-mol) of a synthetic fatty acid fraction C 10 1b (acid number 275 mg con / g), stirring is inserted, Japanese Senzai (similar to ABSK) is poured from measuring device 2 and 18 kg of dioctyl phthalate from measuring device A. Then steam is put into the mixer jacket, the temperature of the mass is raised to 80 - and at this temperature 0.53 kg (0.00645 kg-mol) of zinc oxide and 5.55 kg (0, kg, mol) of cadmium oxide are loaded into the mixer through autoweights. . Due to the reaction, the temperature of the mass increases by. After stopping the heating by steam injection into the mixer jacket, the mass temperature is raised to 1 10-120 0 and allowed to hold for 5-20 minutes until the mass is lightened, then, without stopping stirring, the temperature is set to 75 - and 20.9 kg is loaded (0, kg -mole) eight-hydroxide hydroxide. After some time (15–10 min.) The temperature of the mass spontaneously rises on, 9 foaming is possible. After heating is completed, the jacket is turned on to the masses and the mass is heated to 90-100 ° C and the reaction water is distilled off with a water-isobutanol azeotrope. As the mass thickens, while ensuring its mobility, add portions of dioctyl oil lat, only 1 - 17 kg. After completion of the distillation of water, a sample is taken for analysis. In a positive analysis, 7, B5 kg of the synthetic fatty acid melt C –– fractions are loaded from the mixer 3 into the mixer (1 ° is stirred until a homogeneous mass is obtained. The finished product is a cream colored homogeneous mass, quantitative yield kg. Total synthesis time 2 , 5 3.0 hours. Composition of SCS, wt .: Complex salt of barium cadmium-zinc and synthetic fatty acid fraction С 0 - Cxjj (molar ratio of salts, respectively 1.5: 1.0: 0.15) 56.3 Senzi, ABSK1,7 Dioctyl phthalate 31,7 Synthetic fat for acid fraction - ia7 Analysis results: Found,: Ba 7.9 ; Cd, 63; Zn O, it; Ca 0.1 Calculated: Ba 8.0; Cd C, 8; Zn 0.35; Ca 0.27 Acid number, mg KOH / g 15.7 Moisture content,% 1.8 Dispersibility of isolated salts: Fractions up to 3 Fractions up to 10/410 fraction up to 25yu, 5 Example 3- Obtaining a complex complex stabilizer for infrared and monolithic film materials (the mole ratio of barium salts cadmium-zinc 1.5: 1.0: 0.15, respectively) Composition of downloadable components, mol%: Carboxylic acids (FFA fraction of Oxide, metal hydroxide (cadmium oxide, zinc oxide, barium hydroxide, 8-hydroxyl)) I Additives: Alkylbenzo Calcium lsulfonate Dioctyl sebacate (salt formation activator) Organophosphate stabilizer forstab K-201, synthetic fatty acid fraction C - Cn (3 (target additives J The total reaction equation is given in Example 1. A 200 L centrifugal blender of 200 l from meter 1 is loaded 6 kg (0.225 kg-mol) of a synthetic C 10 fatty acid fraction (acid number 275 mg coy / g) include stirring and 25 kg of calcium benzene alkyl benzene sulfonic acid (ABSC) is added from mernik 2 and 2-13 kg of dioctyl sebacate from the mernik. Then steam is turned on into the jacket of the mixer, the temperature of the mass is raised to 80–90 ° C and at this temperature 0.53 kg (0, kg-mol) of zinc oxide and 5.55 kg (0, kg, mol) of oxide are loaded into the mixer cadmium. Due to the reaction, the temperature is increased by 5 to 10 ° C. After stopping the heating by steam injection into the mixer jacket, the temperature of the mass is raised to 110 - and allowed to stand, with stirring, until lightening, the reaction mass. Then set the temperature of the mass 70 - and load into the mixer 20.9 kg 0.06, 5 kg-mol) of eight-water barium hydroxide. After some time, the temperature of the mass spontaneously rises by 5 - 10 ° C, foaming is possible. After the end of heating, steam is turned on, the mass is heated to 90 - and the reaction water is distilled off with an azeotrope of water - isobutanol, then at 115 isobutanol, after distillation of isobutanol a sample is taken for analysis. With a positive analysis, 7.65 kg of synthetic fatty acid melts of fraction С lo are loaded into the mixer, and at 80-25 kg forstab K-20f. The contents are mixed to a uniform consistency. The finished product is a moving, light brown colored paste. Output 115.0 - 117.0. The total synthesis time is 3.0 - 3.5 hours. Composition SCS, masD: Complex salt of barium cadmium - zinc and synthetic fatty acid, fraction С (, - С j (molar ratio of salts, respectively 1.5: 1.0: 0 , 15) ABSC, the main substance Dioct orsebaccinate Organophosphate stabilizer, forstab-K-201 Synthetic fatty acid fraction Analysis: Found,%: Ba 7.5; Cd 4.5; Zn 0.39; Ca 0.30; R 1.7 Calculated,%: Ba 7.75; Cd 4.14 Zn 0.36; Ca 0.25; P 1.85 Dispersibility of the isolated salts; Fraction up to 3 I-80 Fraction to l-0 / t12 Fraction to 25 / U-8 Example 4. Obtaining complex complex non-toxic calcium zinc of a new stabilizer for foam materials and artificial leather of porous and monolithic execution (molar ratio of calcium salts of zinc 1: 1) Composition of the loaded components Masd: Carboxylic acids (mixture of synthetic fatty acids of the fraction -fo 16 7 10 with an acid number of 220 mg con / g ) 43, Oxides, metal hydroxides (zinc oxide, calcium hydroxide) 6, Additives: Calcium alkyl benzene sulphonate .16, Organophosphate stabilizer Poligard OB, epoxidized soybean oil33, Total reaction equation for salt formation: mF (), pSaon + sa (it) 4 ino b), CCH), COO j, -SHgiO, where n is predominantly 8-18; less than C p 3, above C,} Q 9 V, a MKM 200-liter-type centrifugal mixer, equipped with a jacket for heating or cooling, with a reverse and direct cooler with a phase separator, 68.25 kg (0.268 kgmol a) Melt a mixture of synthetic fatty acids (acid number 220mg KOH / g) include stirring, heating, reflux condenser, and 25 kg of alkylbenzenesulfonate calcium phonate (ABSC) is added from mernik 2. At 80-85 ° C, 5.45 kg of zinc oxide (O, About 7 kg-mol), 4, -95 kg (0.0 7 kg-mol) of calcium hydroxide are loaded into the mixer. After 5 to 10 minutes, due to the heat of reaction, the mass temperature rises by 10-15 ° C, mass foaming is observed, the separated reaction water is distilled off with an azeotrope and separated in a phase separator. After the cessation of foaming (lasts for 15–20 min), heating is turned on and at a temperature of 105–115 ° C is allowed to hold for 1–1.5 h until the water is distilled off, then a sample is taken for analysis, with a positive analysis (acid number less than 3 mg KOH / g, moisture content less than 2%) turns off the debris, load 40 kg of epoxidized soybean oil and 12.5 kg of polygard RP into the mixer, and continue mixing until a uniform consistency is achieved. At 45 ° C the product is discharged into the container. The output of complex complex stabilizer is 149-150 kg or 98%. Total synthesis time is 2.0-2.5 hours. Composition of SCS, May .: Complex calcium zinc salt of FFA fraction C (j ao (molar ratio of salts 1: 1) 50.3 Calcium alkylbenzenesulfonate 14.7 Target additives (epoxidized soybean oil, Polygard RP) 35.0 Analysis results: Found, Ca 2.44; Zn 2.7; P 0.35. Calculated,%: Ca 2.27; Zn 1 , 92; P 0.4 Dispersibility of complex salts extracted from a paste,%: Fractions up to C / A 80-85 Fractions / 10 Fractions up to 25 / Else

Note: The dispersion composition is determined on an MBI microscope using an ocular p-mic meter.

PRI me R 5. Getting complex complex stabilizer for film materials (the molar ratio of salts of barium-lead 1: 1)

The composition of the loaded components, wt.%:

Carboxylic acid

fraction C -

(acid number

200 mg con / g) 28.2

Metal oxides

(barium oxide,

lead oxide) E,

Additives:

Calcium alkyl benzene sulphonate

HABSYu16, / t

Dibutyl adipate (plasticizer, salt formation activator) 1.5

Tris (octyl) phosphite (organophosphate stabilization. Torus) 7.9

2-Ethylhexyl Epoxystearate (epoxidized plasticizer / stabilizer) 11.8

Polyethylene wax (lubricant) 11,8

The total reaction equation for salt formation:

 4SiZ (SC) SOON + WAO PIO § L CHjCCHr)

+ EcH (tH,) rtCooj pfe + 14.0.

A 200-liter MKN-type centrifugal blender equipped with a jacket for heating and cooling using reflux condenser with phase separator, from the meter 1 load kg (0.153 kg-mol) of synthetic fatty acid melt С -j - Cijg (acid number 200 kg con / g) include stirring, heating, reflux condenser, and from mernik 2, 25 kg of calcium benzenesulfonate calcium (ABSK) and 22.2 kg of dibutyl adipate are added. At 90-95 ° C, 8.55 kg (0.0382 kg-mol) of lead oxide is loaded into the mixer. After 5-10 minutes, due to the heat of the salt formation reaction, the mass temperature rises by 10 -, mass foaming occurs, after holding for 20–30 min, the temperature of the mass is lowered 5 to 80 ° C, the mixer is loaded

5.87 kg (6.0382 kg-mol) of barium oxide, the mass is heated to 100 ° C. At the end, after exposure (20 min), a sample is taken for analysis.

0 (acid value should be lower than 3 mg OH / g, moisture content less than 2). In the case of a positive analysis, the heating is turned off, at 80, 12 kg of 2-ethylhex5 silepoxystearate, 18.0 kg of tris (ok - - teal) phosphite and 18.0 kg of polyethylene wax are loaded into the reaction mass and mixed until. homogeneous consistency. When b About 65 ° C complex complex stabiliz

0 tor discharged into the container. The finished product is a uniform ivory paste. Output - 130 kg or 97, the total synthesis time of about 2 hours.

5 Composition of SCS, wt.%: Complex bariysints salt of SFA

fraction C - -

(molar ratio of 0 salt 1: 1) i 38.0

Calcium alkylbenzenesulfonate 15 O

Dibutyl adipate15 0

2-ethylhexyl stearate12.0

Three (octyl) phosphite

Polyethylene wax 12,0

The results of the analysis:

Found: Ba 1.5; No. 5.2; Ca 0.67; P 0.65. 0 Calculated,%: Ba 1.7; Pb 5; Sa

0.5; p 0.9

The dispersion of salts isolated from the paste:

Fractions up to 3 / f- 80-85 Fractions up to lOyu. . Fractions up to 25yu. The rest PRI me R 6 («« known method). Production of complex nontoxic calcium-zinc stabilizer complex for film materials and artificial leather in porous and monolithic execution (the molar ratio of calcium-zinc salts is 1: 1).

The composition of the loaded components, wt.%:

Carboxylic acid (mixture of synthetic fatty acid fraction.

Claims (2)

  40 ib P Cho with an acid number of "220 mg con / g)" "3, Oxides, metal hydroxides (zinc oxide, calcium hydroxide) 6.7 Additives; Dioctyl phthalate (DFT) (activator salt-free) 15 O Organic phosphorus stabilizer-noligard OF TU-6-02-680-72 (tris (octyl) phenylphosphite) and epoxidized soybean oil TU-6-10-722-77 (split Additives) The total equation of the salt formation reaction is: CH, (CH) j, COOH + Cu (OH) + ZoO - CcrSeSn) (40: n (sn5 | „coo 1pvn where n is predominantly 8 - 18; fractions less than 3% , above C - 10%. A 200-liter centrifugal mixer of the type MKG4 with a capacity of 200 l, equipped with a jacket for heating or cooling, is charged with a direct cooler, from measuring device 1, 68.25 kg (0, mol) of the melt of synthetic mixture fatty acids (acid number 220 m con / g), include stirring, and heating and from the measuring device 4 25 kg of dioctyl phthalate are loaded into the mixer. At 90, 5.5 kg (0.0–7 mol) of zinc oxide are loaded into the mixer, the mass temperature raise to 130 and give at this temperature an exposure for 1.5 to 2 hours until the acid number of the reaction mass reaches 62 - b5 mg KOH / g, which indicates the completion of the formation of the synthetic fatty acid zinc salt. Then the temperature of the mas is lowered to 80 - 85Soi and loaded into the mixer, 95 kg (0.0b7 kg-mol) of calcium hydroxide. After a few minutes, due to the heat of the reactions, the temperature of the mass rises to 8–1, LSR, Foaming of the reaction mass is observed. After the end of the foaming, the heater is turned on and the exposure is 100 - for 1.0-1.5 h before the end of the distillation of the reaction water, a sample is taken for analysis, with a positive analysis (acid cycle less than 3 mg KOH / g, content less than 2 %) turn off the heating, load 0 kg of epoxidized soybean oil and 12.5 kg of Polyhard continue to mix until a uniform consistency is achieved. When - the product is discharged into the container. One complex complex stabilizer is 149.5 kg or 98%. Total time of the thesis 3.5, 5 hours. Composition of SCS, wt.%: Complex calcium-zinc salt FFA fraction 10 1 ° (molar ratio of salts 1: 1) 50.3 Activator of salt formation (dioctyl phthalate) Target additives: Epoxidized soybean oil, Poligard RP Analysis results: Found,%: Ca 1.95; Zn 2.85; R 6 Calculated,%: Ca 1.79; Zn 2.93; , k Dispersity of the extracted powder,%: Fractions up to 3 / x 5-10 Fractions up to 5-10ft 15-20 Fractions up to 25 / x - 50-60 Fractions up to Remaining tagging. The synthesis is carried out according to the method described by the known method without ABSC, which causes an increase in the synthesis temperature and lower; the dispersion of salts. PRI me R "8. Preparation of complex tava for porous artificial (the molar ratio of barium salts to zinc is 1.5: 1.0: 0.15). Composition of the loaded components.%: Carboxylic acids (mixture of synthetic fatty acids of C-C- fractions containing C 5 -Cf fractions and 10-fb ratio of 1: 3) 10.06 Oxides, metal hydroxides (zinc oxide, ba hydroxide | ei eight-water) 5.72 Additives: Calcium salt alkyl benzene sulphonic acid (optically-pending) 18.9 Mono ester of glycerol and FFA, CflQ fraction, diphenyldecyl phosphate, diphenylphosphite, pigment, pore-forming agent - dinitroentane, tetramethinetetrazine, 0.3, 0.3, 0.3 -0.3%; oil (target additive) 64.28 Total The formula for the reaction of complex salt formation is given in Example 1. A laboratory stainless steel 3-liter type mixer placed in an oil bath and equipped with a reflux condenser and an H-shaped nozzle to separate the water in azeotropic distillation is charged 227 g (.1.113 mol} mixture of synthetic fatty acids fractions C - - Cd and 10 1b acid number of mixture of acids 275 mg KOH / G, acid content 1Q%), including С-, 5% 1, are mixing and heating, at 50 BO -C, 150 g of dioctylapinate and 350 g of calcium salt alkylbenz are added 2%, .69 g (0.0315 mol) of zinc oxide and 2b, 9b g (0.210 mol) of cadmium oxide are loaded into the mixer at 80–85 ° C. Due to the reaction, the temperature of the mass rises by 2 -, then the temperature of the mass is raised to 110-115 ° C and allowed to stand for a period of minutes before lightening the reaction mass. The temperature of the mass is lowered to 80 ° C and 99 g (0.315 mol) of an eight-water barium hydroxide are charged. After 5–10 min, foaming and mass heating are observed. After the foaming is completed, the temperature of the mass is raised to 105-110 ° C and the reaction water is distilled off with an azeotrope, which is separated in an H-shaped nozzle. After completion of the distillation of water, a sample is taken for analysis and, with a positive analysis (acid number less than 3 mg KOH / g, moisture content less than 2%), 50 g of glycerol monoether and Cnj synthetic fatty acid are loaded into the mixer, at 80 - load 100 g of a mixture of diphenyldecylphosphite and diphenylphosphite in a 2: 1 ratio, mix until a homogeneous composition, then load 350 g of titanium dioxide and, at C, alternately, 350 g of dinitrozopentamethylene tetrazine (decomposition 933659 2 1 with 5 hours c 5, 5 for 5) gi bó 13 those tse sa ka ka you „ 0 g of the 0.3-th solution, 1 o-oxybiophenoxyarsin in the epoxyated soybean oil, after a more uniform consistency, a homogeneous paste of light yellowness is obtained. Exit 2189 g or E8. Total synthesis synthesis. Composition of the product, mas: Complex salt of barium cadmium-zinc and mixtures of synthetic fatty acids C -f- e., (Molar ratio of salts - respectively 1.5: 1: 0: 0.15) 13.25 Calcium salt of the benzene A solution of 10,10-oxybiophenoxyarsin in epoxidation m soybean oil (a mixture of fungicide and epoxidized plasticizer-stabilizer) 26.50 Analysis results: Found: Ba: 2.01; Cd 0.92; NS, Claims of Invention A method of obtaining a stabilizer of polyvinyl chloride by intermixing a mixture of oxides or oxides and metal rooxide with caric acid fractions at a temperature of 60 ° C, which, in order to improve the quality of the product and simplify the procedure, the latter is carried out in the presence of an alkylbeneloolsulfolotole salt, as a fraction of carbonic, acids use the C-C fraction 1993365920 and as a mixture of oxides or oxide-1. Authorship certificate of the USSR this and metal hydroxide - oxide 1385 f cl. C08 L 27/06, 1971. "cadmium, zinc, barium, lead, barium hydroxide, calcium. 2. USSR author's testimony Sources of information, $ No. 601276, cl. C07 C 51/52, 1975 all taken into account during the examination (prototype).