SU724524A1 - Method of producing chewing gum polymeric base - Google Patents

Description

The invention relates to the chemistry of high molecular weight compounds, in particular, to the technology of producing a polymeric base for chewing gum, and can be used in the chemical industry. A method is known for producing a chewing gum polymeric base by radical polymerization or copolymerization of vinyl acetate in an organic solvent medium, followed by separating the base polymer from polymerization, purifying it from unreacted monomers and washing it, and for this purpose polymerization is subjected to distillation and washing with hot and cold water QQ. This method has a number of disadvantages. The polymer is not completely purified of monomers, solvent and by-products. Their content after such a treatment is not less than OD-O, 5%, since washing only exists from the surface of the whole mass, which has a small flat surface, due to four-D diffusion of the residual monomer to the solvent from the internal parts mass to surface; The energy cost per unit of the j-product product is high due to the need for an energy-intensive process of distilling the main mass of the solvent, monomers and by-products from the reagent mass. The use of these polymers is limited due to the high content of monomers, solvent and by-products (more than OD%). A large amount of water is used for washing, processing and disposal of washing water is difficult. The process is periodic and therefore ineffective. The purpose of the invention is to increase the purity of the base and reduce energy consumption. This goal is achieved by isolating, purifying unreacted monomers and washing the substrate by continuously molding the polymerizate in the form of elementary fibers with a diameter of 0.01-0.1 mm in an anti-neutral water washer (Adytelnaya bath with SCfost of passing fibers-5-10 m / min, rionraviepHsaT (polymer solution) is forced from the holes of the nanostheater (dies) into the aqueous medium, where it coagulates and is formed as fibers. The diameter of the holes is formed in the form of fibers, depending on the requirements, the purity of the final product. About 1 to 100,000 pieces per hole are accepted for the requested ms. The mold forming speed is 510 m / min, and the capacity of ONE-1) spunbill in terms of dry polymer is 15-50 kg / h From the precipitation bath All elementary fibers are collected in the total weight (tow). And after three times washing and pressing in the washing unit, they are packed in meitsi and used as a basis for chewing gum. The thief for the product enters from the end of the washer, contacts the polymer in the jets and then flows into a precipitating bath, where it is enriched with solvent Ea due to its extra waste from the fibers And by 7–4 the solution contains more than 5 solvents. Example. Components, parts by weight: Vinyl acetate90 Vinyl pyrrolidone 10 Ethyl alcohol 40 Porofor1,4 The polymerization is carried out at a bO-bB C temperature for 6 hours. The reaction mass has the following indicators,%: The dry residue 75 The content of monomers 2D The reaction mass is separated and cleaned through the thread former in the water connection bath at a speed of 5 m / min. With coagulated Elementary fibers from the precipitation bath in the form of a common rope, washed three times and wring out on rollers. The resulting polymer is used as a base for chewing gum. In tab. 1 shows the content of residual monomer in the finished product, depending on the diameter of the filament (the diameter of the elementary fiber). Table 1

The content of monomers in the polymer

The content of the solvent (ethyl alcohol) in the precipitation vanie 1O-12%.

PRI mme R 2. Take the components, parts:

Vinyl acetate100

Ethyl alcohol2 O

Beczoyl peroxide 1,5

The reaction ended in 1 hour. The reaction mass has the following indicators,%

CUNERATOR SUCTION IN POLYMER

0,00017

0.0001

Dry matter content of si

Monomer content 2,9

The reaction mass is fed to the isolation and purification at a speed of 7 m / min, under conditions analogous to example 1. The polymer obtained is used as the basis of chewing gum. In tab. Table 2 shows the content of monomer in a polymer formed by thread formers with different diameters.

Table 2

0.0001

0,00073 Solvent content (ethnly 1: h :) alcohol), in the precipitation bath 11-13%. Froze They take cocktails, parts by weight: Vinyl acetate86 Acetic acid35 Water30 Benzoyl peroxide 0.9 Acetaldehyde 5 Polymerization is carried out at 68-7-2 ° C for 7 hours. The reaction mass has the following indicators,%:

Table 3 4 Monomer content 0,9 Soderdank dry residue 56 The reaction mass is formed with a velocity of 10 m / min, and the rest of the conditions are equivalent to examples 1-2. The obtained polymer is used as a base for chewing gum. In tab. 3 shows the content of the monomore in the polymer, the formed filament forming agent with different hole sizes.

Claims (1)

Claim The method of obtaining a polymer base for chewing gum by radical polymerization or copolymerization of vinyl acetate in an organic solvent, followed by isolation from the 'polymerisate base, purification of it from unreacted monomers and washing, different in that, in order to increase the degree of purification and reduce energy consumption, the allocation, purification of unreacted monomers and washing the base is carried out by continuous molding of the polymerizate in the form of elementary fibers with a diameter of 0.01-0.1 mm in countercurrent water sedimentation bath at a fiber passage speed of 5-10 m / min.