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RU-2861475-C1 - METHOD FOR PRODUCING MASTERBATCH INTENDED FOR ADDITION IN MANUFACTURE OF FILM MATERIALS HAVING ANTI-FOG PROPERTIES

RU2861475C1RU 2861475 C1RU2861475 C1RU 2861475C1RU-2861475-C1

Abstract

FIELD: chemistry; polymer material technologies. SUBSTANCE: invention relates to polymer compositions for producing hydrophilic polymer films, and can be used for producing films for any purpose with an anti-fog effect. Provided is a method for producing a polymer composition intended for addition in the manufacture of film materials having anti-fog properties. First, a thermoplastic polymer is mixed with an anti-fog additive during passage through an extruder at a temperature of 200-215°C, wherein the anti-fog additive used is an ester of oleic acid and polyethylene glycol PEG-200 Monooleate. After mixing, the resulting polymer composition is cooled to a temperature of 5-50°C and ground into granules to a particle size of 2 to 3 mm, a masterbatch is prepared with the following component ratio, mas.%: thermoplastic polymer 80-95; PEG-200 Monooleate 5-20. EFFECT: polymer materials (films) with stably high performance characteristics, such as a good anti-fog effect, and, as a result, increasing the transparency and light transmittance of the film. In addition, the introduction of the proposed masterbatch containing an ester of oleic acid and polyethylene glycol into the film composition does not reduce the strength properties of the film. 1 cl, 1 tbl, 3 ex

Inventors

  • Novikova Iuliia Vadimovna
  • Chernov Konstantin Anatolevich

Dates

Publication Date
20260505
Application Date
20250610

Claims (2)

  1. A method for producing a polymer composition intended for addition during the production of film materials possessing anti-fog properties, characterized in that a thermoplastic polymer is mixed with an anti-fog additive while passing through an extruder at a temperature of 200-215°C, wherein an ester of oleic acid and polyethylene glycol PEG-200 Monooleate is used as an anti-fog additive, after mixing the resulting polymer composition is cooled to a temperature of 5-50°C and crushed into granules to a particle size of 2 to 3 mm, a masterbatch is prepared with the following ratio of components, wt.%:
  2. Thermoplastic polymer 80-95 PEG-200 Monooleate 5-20

Description

The invention relates to the chemistry and technology of polymeric materials, namely to polymer compositions for producing hydrophilic polymer films, and can be used to produce films for any purpose with an anti-fogging effect. Anti-fog properties prevent condensation on the surface of modern film materials, and moisture quickly drains off the film's surface. For example, in the case of agricultural greenhouse films, condensation (water droplets) does not fall onto plant leaves. When food products are packaged in cling film (for example, in supermarkets), anti-fog properties prevent the film from fogging, allowing consumers to clearly see the quality of the food inside the package. This is achieved by adding a special concentrate (masterbatch) during the film production process – an antifog agent that reduces the surface tension of water on the film surface. An anti-fog additive that imparts an anti-drip (anti-fog) effect to the film. Anti-fog additives are designed to increase the affinity of the polyolefin film surface for water, allowing moisture to spread evenly across the surface and prevent it from forming individual droplets. Droplets on the surface of greenhouse films can lead to crop losses due to reduced light transmission, rot, algae growth, and plant diseases. The packaging film impairs the visual appearance of products and, in some cases, can lead to spoilage. Most often, in the production of polymeric materials, glycerol esters and polyesters, esters and ethoxylated compounds of sorbitan, alcohol and nonylphenol ethoxylates are used as antifog additives. A polymer composition for producing a light-transforming film material is known [RU 2561455, published 08/27/2015], in which a non-ionic salt of fatty aliphatic acids, sorbitol monostearate, is used as a hydrophilizing antifog additive. A disadvantage of the known polymer composition, as well as the anti-fog additives used, is the delayed onset of action, i.e., the hydrophilic properties of the film begin to manifest themselves 12-48 hours after the film material is produced. Furthermore, it is not always possible to achieve a uniform distribution of the anti-fog additive over the entire surface of the material, and the "anti-drip" effect does not last for the entire service life of the finished film. The technical objective of the present invention is to develop a method for producing a masterbatch intended for adding during the production of film materials that have anti-fogging properties, which are maximally manifested 2 hours after the production of the film material and have an anti-drip (anti-fogging) effect throughout the entire service life of the film. In order to solve the stated technical problem of the invention, a method for producing a masterbatch intended for adding during the production of film materials possessing anti-fog properties is proposed, characterized in that a thermoplastic polymer is mixed with an anti-fog additive when passing through an extruder at a temperature of 200 - 215 °C, wherein an ester of oleic acid and polyethylene glycol CAS 9004-96-0 (PEG-200 Monooleate, PEG-4 Oleate) is used as an anti-fog additive, after mixing the resulting polymer composition is cooled to a temperature of 5-50 °C and crushed into granules to a particle size of 2 to 3 mm, a masterbatch is prepared with the following ratio of components, wt.%: Thermoplastic polymer80-95PEG-200 Monooleate5-20 The resulting masterbatch is further used in the production of polymer film by adding 2-4% to the thermoplastic polymer. Polyolefins (polyethylene, polypropylene) are used as thermoplastic polymers. The choice of thermoplastic polymers is determined by their wide use for producing various films. The choice of antifog additive is determined by the structure of the oleic acid ester molecule and polyethylene glycol CAS 9004-96-0 (PEG-200 Monooleate, PEG-4 Oleate). The method for obtaining a masterbatch intended for addition during the production of film materials with anti-fog properties is carried out as follows. The thermoplastic polymer is mixed with an anti-fog additive while passing through an extruder at a temperature of 200 - 215 °C. An ester of oleic acid and polyethylene glycol CAS 9004-96-0 (PEG-200 Monooleate, PEG-4 Oleate) is used as an antifog additive. The resulting polymer composition is cooled to a temperature of 5-50 °C and crushed into granules to a particle size of 2 to 3 mm. The masterbatch is prepared using the following ratio of components, wt.%: Thermoplastic polymer80-95PEG-200 Monooleate5-20 The qualitative characteristics of the films obtained using the proposed masterbatch are presented in Table 1. Table 1 – Quality characteristics of films IndicatorExisting technologyThe proposed inventionManifestation of anti-fog properties, h12:48Manifestation of anti-fog properties at the end of the service life (5 years)-+Light transmittance, %8795 The method for obtaining a masterbatch intended for addition during the production of