BG51101A1 - Method for producing a water-soluble polymer - Google Patents

Abstract

The method produces a polymer based on tetraalkylammonium salts, which is used as a gloss-forming additive to basic electrolytes for galvanizing. The additive imparts gloss to galvanic coatings in a wide range of current densities. The method involves heating a 30-70% aqueous solution of dimethyldiallylammonium chloride or bromide in the presence of an initiator of sulfur or selenium dioxide at 85-115°C.

Description

The invention relates to methods of obtaining water-soluble polymers, in particular polymers based on tetraalkylammonium salts, which can be used as gloss-forming additives to alkaline electrolytic galvanizing, polymeric quaternary ammonium salts can also be used as coatings, coagulants, precipitants, preparations possessing bactericidal properties, inhibitors corrosion of metals, interphase catalysts in organic synthesis, surface-active substances, adjuvants in immunology and so on.

The purpose of the invention is to demonstrate the shine-forming action of the polymer in alkaline electrolytic galvanizing.

Example I.

250 ml (300 g) of a 30% aqueous solution of dimethyldiallylammonium chloride (DCAH) is loaded into a 300 ml reactor with a reflux condenser, a stirrer, a thermometer, mixing is started, and at 20°C, sulfur dioxide is added, the temperature in the reactor is increased to 90°C, continue δ

dosage 6½ until the gas leaked. The reaction mixture is kept for 40 hours. Cooled, 240 ml (300 g) of product are obtained.

Example 2.

Analogously polymerize 250 ml (295 g) of 25% DDAH solution. They get 248 ml (297 g) of product.

Example 3.

Analogously polymerize 250 ml (312 g) of a 50% DCAH solution. They get 245 ml (320 g) of product.

Example 4.

Analogously polymerize 250 ml (332 g) of 70% DCAH solution. They get 240 ml (340 g) of product.

Example 5.

Analogously polymerize 250 ml (345 g) of a 75% DCAH solution. However, after 25 hours of polymerization, the formation of a viscous precipitate begins, which falls out of the solution, which makes it difficult to mix the reaction mixture and effectively touch it Example 6.

Analogously to example 3, 250 ml (312 g) of a 50% DCAH solution were polymerized, but no sulfur dioxide was allowed through. They receive 250 ml (ZI g) of the product.

Example 7.

Analogous to example 3, 250 ml (3T2 g) of 50% DCAH solution are polymerized, but in the presence of the initiator - 2 g of selenium dioxide instead of sulfur dioxide. They get 258 ml (330 g) of product.

Bat 8.

Analogous to example 3, 250 ml (312 g) of a 50/-ΗΟΓΟ solution of DCAX are polymerized, but at 85°C. They get 245 ml (320 g) of product.

Example 9.

Analogously to example 8, 250 ml (312 g) of a 50% DCAH solution were polymerized, but at 80°C. They get 248 ml (315 g) of product.

Example 10.

Similarly to example 9, 250 ml (312 g) are polymerized

50% solution of Х^Х, but at P5°С. (It is not possible to raise the temperature of the reaction mixture outside P5°C due to the boiling of the reaction mixture). They receive 235 id (315 g) of product.

Example II.

Analogously to example 10, 250 ml (312 g) of a 50% solution of Х/Х was polymerized, but at 95°С and during 10 hours. 246 ml (316 g) of the product were obtained.

Example 12.

ζ ^- Analogously to example II, 250 ml (312 g) are polymerized

of a 50% solution of Х^Х, but within 8 hours, 246 ml (316 g) of the product were obtained.

Example 13.

Analogous to example 12, 250 ml (312 g) of a 50% ZAH solution were polymerized, but within 50 hours, a further increase in the duration of the polymerization was impractical due to the insignificant improvement in the quality of the lacing coating when testing the product as an additive to electrolytic galvanizing). They get 240 ml (315 g) of product.

« Example 14.

Analogously to example 13, polymer is prepared from 250 ml (400 g) of a 50% solution of diglythyldiallylammonium bromide (Ж4B). They get 245 ml (410 g) of product.

Sample of product polymerization as an additive to low-alloy electrolytic galvanizing.

Composition of the electrolyte:

SO g/l

Σ’ and, 0 Ю g/l

Additive I—10 ml/l

Preliminary testing of additives to zikkatnomu electrolyte is carried out in a Hulla cell with a capacity of 267 ml. Cathode-polished sheet of lettuce, copper or steel, size 103x60.5 mm (0.3 mm), thickness 0.3-0.5 mm.

Conduction iepntanium. 250 ml of electrolyte is measured with a measuring cylinder, to which the synthesis product is added and mixed for 2 minutes. The resulting solution is transferred to the Hulla cell

61101 and conduct electrolysis for 10 min at a current of 1,2,4,5 A and a temperature of 25+5°C. Then the cathode precipitates are rinsed with water and immersed for 5 seconds in a 0.5% solution in distilled water and again rinsed with water. The quality of the coating is determined immediately after immersion in nitric acid, washing with water and drying with a filter.

From the alkaline electrolyte, galvanizing with an additive produces shiny electroplated zinc in the pyrocom range of current densities (0.1-100 A/daG).

Table I gives the conditions for the implementation of examples.

Table 2 shows the results of the obtained copolymers.

61101

Table I

For example, Polymerization temperature, °C Concentration, Prodol, resident- ness the synthesis h Type of polymerization initiator I 9 Gh/ 3 4 5 Prototype 10-80 30-70 40 I 90 . zo 40 2 90 25 40 6½ 3 90 50 40 4 90 70 40 && 5 90 75 25 6 90 50 40 - 7 90 50 40 8 '85 50 40 * θ Og 9 80 50 40 6¾ 10 115 50 40 II 95 50 10 bSg 12 95 50 with about 13 95 50 50 14 95 50 50

Tables I continued

I named , 1 * and Type of monomer Quantity the monomer, ml/year Login the product, ml/year I 6 7 8 Prototype MP I yes; 250/300 240/300 2 mp 250/295 248/297 3 mp 250/312 245/320 4 mp 250/332 240/340 5 mp 250/345 - 6 mp 250/312 250/ZP 7 TT tg A t ^g 250/312 258/330 η O mp 250/312 245/320 α <-> ό mp 250/312 248/315 y mp 250/312 235/315 II mp 250/312 246/316 12 mp 250/312 246/316 13 M-P 250/312 240/315 14 dNB 250/400 245/410

Table 2

For example, Appearance of coatings Range of lower cathode current densities, 9 Y/n~ I 2 3 Prototype Matte, light sulfur I Flexible, bright 0.1-100 2 Matte, light sulfur 0.5-50 3,4,6,10, 11,13,14 Flexible, bright 0.1-100 7 Dark powder Up to 0.3-0.4 8 Flexible, bright 0.1-100 9 Matte, light-blue 0.5-20 12 Matte, sulfur 0.5-20

Claims (1)

A method of obtaining a water-soluble polymer by heating a 30-70% aqueous solution of dimethylammonium chloride or bromide in the presence of the initiator, characterized by the fact that, in order to manifest the shine-forming action of the polymer in alkaline zinc electrolytes, sulfur dioxide or selenium is used as the initiator, and heating is reduced to 85-P5°С.