KR102608143B1 - PVC antibacterial masterbatch and manufacturing method thereof - Google Patents

Abstract

The present invention provides a PVC antibacterial masterbatch and a method for producing the same. The PVC antibacterial masterbatch according to the present invention does not deteriorate even in high temperature and high humidity environments, has excellent wear resistance, scratch resistance, and durability of PVC plastic products, and exhibits excellent antibacterial properties while maintaining excellent antibacterial properties. In addition, it is not polluted by solar ultraviolet rays and pollutants can be decomposed by photocatalysts, making it possible to manufacture excellent PVC window sash profiles.

Description

PVC antibacterial masterbatch and manufacturing method thereof}

The present invention relates to a PVC antibacterial masterbatch and a manufacturing method thereof, and more specifically to a PVC antibacterial masterbatch and a manufacturing method thereof for manufacturing non-polluting photocatalytic antibacterial PVC window sashes.

Polyvinyl chloride (hereinafter PVC) is mainly used as a base material for window profiles, pipes, floor coverings and roof sheets, for example in the construction sector. Rigid and flexible films are likewise made from PVC. PVC is often used as an insulating material for electrical cables and electrical switch boxes, as shrink tube for cables, cable ducts or cable covers.

When using engineered wood for indoor or outdoor window frames, doors, or walls, PVC with wood grain printed is used as a finishing material to increase durability and create a wooden feel.

Compared to metal materials, PVC has a smaller specific gravity, is lighter, has excellent thermal conductivity, and has excellent insulation performance, so it is widely used as a window material. It is cheaper than metal materials, is easier to process, and is used as a profile material for manufacturing windows and doors of complex shapes. This is convenient.

PVC windows are widely used as exterior window finishing materials in construction, but the surface strength of the window material is weaker than that of metal aluminum window sashes.

Ultraviolet rays and oxygen in sunlight cause photo-oxidative decomposition of PVC, reducing its flexibility, ultimately making the structure on the PVC surface brittle, and the thermal expansion of PVC material and repeated friction when opening and closing windows make it less durable than metal.

There is a problem that scratches easily occur on the surface of these PVC windows due to thin photolysis.

In addition, due to this wear and tear, the replacement cycle is shortened, and harmful bacteria inhabit the scratched areas, and when PVC windows are opened and closed by multiple people's hands, cross-contact with harmful bacteria or bacteria occurs, which can be harmful to children and students with weak immune systems. , the elderly and vulnerable are exposed to risk.

In addition, due to the photodecomposition phenomenon of the PVC window sash surface caused by sunlight and ultraviolet rays, impurities in the atmosphere are adsorbed to the surface of the PVC window frame due to static electricity on the surface, polluting the building and making the building look bad.

Patent Document 1: Republic of Korea Patent 10-0521005

The present invention was devised to solve the above problems, and the purpose of the present invention is to prevent deterioration even in high temperature and high humidity environments, to have excellent wear resistance, scratch resistance, and durability of PVC plastic products, and to exhibit excellent antibacterial properties while maintaining high temperature and humidity. We produce PVC windows by extruding PVC window sash profiles by producing an excellent PVC antibacterial masterbatch that has antibacterial properties that do not cause contamination by light ultraviolet rays and can decompose contaminants with photocatalysts.

The object of the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, the present invention

Polyvinyl chloride (PVC) polymer resin; inorganic antibacterial agents; organic antibacterial agents; plasticizer; stabilizator; It provides a PVC antibacterial masterbatch containing; and a colorant.

In addition, the plasticizer is dioctyl phthalate, the inorganic antibacterial agent is zinc oxide particles with a particle size of 20-30 nm, cuprous oxide particles with a particle size of 90-100 nm, and copper particles with a particle size of 150-200 nm, and the organic antibacterial agent is oxybiphenoxacin (10,10'-oxydiphenoxarsine, OBPA) and zinc 2-pyridinethiol-1-oxide (Zn PTO), and the stabilizer is sodium chloride and hindered amine. amine).

In addition, in the PVC antibacterial masterbatch, the zinc oxide particles are 30-40 parts by weight, the cuprous oxide particles are 10-20 parts by weight, and the copper particles are 5-10 parts by weight, based on 100 parts by weight of the PVC polymer resin. OBPA is 0.1-0.3 parts by weight, Zn PTO is 0.1-0.3 parts by weight, dioctyl phthalate is 20-30 parts by weight, sodium chloride is 0.1-0.3 parts by weight, and hindered amine is 1.8-2.0 parts by weight. Do it as

In addition, the present invention

Preparing a first mixture by melting 100 parts by weight of PVC polymer resin and then mixing 10-15 parts by weight of dioctyl phthalate and 5-10 parts by weight of copper particles with a particle size of 150-200 nm based on 100 parts by weight of PVC polymer resin. ;

In the first mixture, 10-15 parts by weight of dioctyl phthalate, 30-40 parts by weight of zinc oxide particles with a particle size of 20-30 nm, 10-20 parts by weight of cuprous oxide particles, and oxybiphenoxacin (10,10' -oxydiphenoxarsine, OBPA) 0.1-0.3 parts by weight, zinc 2-pyridinethiol-1-oxide (Zn PTO) 0.1-0.3 parts by weight, sodium chloride 0.1-0.3 parts by weight, hindered amine 1.8 Preparing a second mixture by mixing -2.0 parts by weight and a colorant;

Melting and extruding the second mixture at a temperature range of 220-250° C. while stirring; and

It provides a method for producing a PVC antibacterial masterbatch, including the step of manufacturing a masterbatch by cooling and cutting the extrudate formed by performing the melting and extrusion.

Additionally, the present invention provides a PVC antibacterial window sash containing the above PVC antibacterial masterbatch.

In addition, the present invention provides a photocatalytic non-polluting PVC antibacterial window sash containing the above PVC antibacterial masterbatch.

In addition, the present invention

Preparing a first mixture by melting 100 parts by weight of PVC polymer resin and then mixing 10-15 parts by weight of dioctyl phthalate and 5-10 parts by weight of copper particles with a particle size of 150-200 nm based on 100 parts by weight of PVC polymer resin. ;

In the first mixture, 10-15 parts by weight of dioctyl phthalate, 30-40 parts by weight of zinc oxide particles with a particle size of 20-30 nm, 10-20 parts by weight of cuprous oxide particles, and oxybiphenoxacin (10,10' -oxydiphenoxarsine, OBPA) 0.1-0.3 parts by weight, zinc 2-pyridinethiol-1-oxide (Zn PTO) 0.1-0.3 parts by weight, sodium chloride 0.1-0.3 parts by weight, hindered amine 1.8 Preparing a second mixture by mixing -2.0 parts by weight and a colorant;

Melting and extruding the second mixture at a temperature range of 220-250° C. while stirring;

manufacturing a masterbatch by cooling and cutting the extrudate formed by performing the melting and extrusion; and

After making the masterbatch into a gel form, injecting it into an extrusion molding machine with air suction, extruding it into a mold at a constant pressure and speed to produce a PVC window profile through cooling using water cooling. A method of manufacturing a PVC window profile including a step. provides.

The PVC antibacterial masterbatch according to the present invention does not deteriorate even in high temperature and high humidity environments, has excellent wear resistance, scratch resistance, and durability of PVC plastic products, and exhibits excellent antibacterial properties while maintaining excellent antibacterial properties. In addition, it is not polluted by solar ultraviolet rays and pollutants can be decomposed by photocatalysts, making it possible to manufacture excellent PVC window sash profiles.

Figure 1 shows a flow chart of a method for manufacturing a PVC antibacterial masterbatch according to an embodiment of the present invention;
Figure 2 shows a flow chart of a method for manufacturing a PVC window profile according to an embodiment of the present invention;
Figure 3 shows an extrusion molding device used in the PVC window profile manufacturing method according to an embodiment of the present invention.

Hereinafter, various embodiments will be described in more detail with reference to the attached drawings. The embodiments described herein may be modified in various ways. Specific embodiments may be depicted in the drawings and described in detail in the detailed description. However, the specific embodiments disclosed in the attached drawings are only intended to facilitate understanding of the various embodiments. Accordingly, the technical idea is not limited to the specific embodiments disclosed in the attached drawings, and should be understood to include all equivalents or substitutes included in the spirit and technical scope of the invention.

Terms containing ordinal numbers, such as primary, secondary, first, second, etc., may be used to describe various components, but these components are not limited by the above-mentioned terms. The above-mentioned terms are used only for the purpose of distinguishing one component from another.

In this specification, terms such as 'include' or 'have' are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof. When a component is said to be 'connected' or 'connected' to another component, it is understood that it may be directly connected or connected to the other component, but that other components may exist in between. It should be. On the other hand, when a component is mentioned as being 'directly connected' or 'directly connected' to another component, it should be understood that there are no other components in between.

In this specification, the term masterbatch is used synonymously with compound and plastic product, and is understood to mean the introduction of additives into a polyvinyl chloride (PVC) polymer matrix. The at least one polymer or polymer is preferably formed at least 50% by weight, preferably at least 80% by weight from the monomer vinyl chloride. This primarily applies to cases where the polymer is a PVC copolymer formed not only from vinyl chloride but also from other monomers, for example vinyl acetate or butylacrylate. In such cases, the copolymer is preferably formed at least 50% by weight, more preferably at least 80% by weight from the monomer vinyl chloride. This is secondarily the case when the polymer comprises a mixture or blend of various polymers, one of which is a PVC homopolymer or a PVC copolymer. In such cases, the mixture or blend is preferably formed at least 50% by weight, more preferably at least 80% by weight from the monomer vinyl chloride. The polymer is preferably PVC.

In addition, when describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof is abbreviated or omitted.

The present invention relates to polyvinyl chloride (PVC) polymer resin; inorganic antibacterial agents; organic antibacterial agents; plasticizer; stabilizator; It provides a PVC antibacterial masterbatch containing; and a colorant.

The theoretical melting point of PVC is 220℃, but thermal decomposition begins at 100℃, which is much lower than that, and has the disadvantage of causing degradation even by ultraviolet rays. Additionally, its softening point is relatively low, so its mechanical strength decreases around 80℃. There is a disadvantage in that it drops sharply. However, it has excellent chemical resistance and flame retardancy that extinguishes the flame as soon as the flame is removed. It is compatible with various additives such as plasticizers, stabilizers, and fillers, and mixes quite well with other polymer materials, so its processing range is very wide. Therefore, although it has poor thermal stability, it is widely used for various processability.

PVC plastic products are used as structural materials for window frames (sashes), pipes, rainwater, and gutters, and soft products are used to manufacture wire coverings, medical tubes, toys, floor decorations, and disposable gloves. It is also used in automobile interior materials, sealants, and molded products, and its uses are countless. Additionally, because it has excellent transparency, it is used for transparent plastic bottles, films, sheets, etc. The processing characteristics of PVC resin include poor thermal stability, low activity, low plasticizer absorption, and excellent compatibility with additives. Due to these characteristics of the resin itself, PVC cannot be used alone and is sometimes used in combination with various additives. In addition, it has excellent compatibility with various additives, making it possible to produce products with various physical properties, and has the advantage that various processing methods can be used.

The polyvinyl chloride (PVC) polymer resin preferably has a degree of polymerization of 800 to 1200. If the degree of polymerization is less than 800, physical properties such as water resistance, acid resistance, and alkali resistance are lowered, and if the degree of polymerization is more than 1200, there is a problem of deterioration in processability, so the degree of polymerization is adjusted by paying attention to the range presented in the present invention.

The plasticizer is included to improve the processability of the PVC polymer resin and to provide flexibility and elasticity so that the PVC polymer resin can be processed and molded below its decomposition point. A preferred example of the plasticizer is dioctyl phthalate, more preferably, 20-30 parts by weight of dioctyl phthalate is used based on 100 parts by weight of PVC polymer resin, and most preferably, dioctyl phthalate is used as the plasticizer. Use 25 parts by weight based on 100 parts by weight of PVC polymer resin.

The inorganic antibacterial agent is preferably used by mixing zinc oxide particles, cuprous oxide particles, and copper particles.

Zinc oxide particles, especially zinc oxide nanoparticles, are substances that decompose various bacteria and pollutants by promoting catalytic reactions (oxidation and reduction reactions) using sunlight as an energy source. Zinc oxide is an excellent photocatalyst material because it has a high absorption rate in ultraviolet rays, high oxidizing power, and physical-chemical stability. When zinc oxide is exposed to light, it undergoes an oxidation-reduction (REDOX) reaction and generates O ^2- or OH radicals that act as a strong oxidizing agent. These radicals break down harmful organic substances around them and convert them into carbon dioxide and water. The surface of a contaminated PVC window sash can be maintained in its original color due to the photocatalytic phenomenon of zinc oxide particles. Moreover, zinc oxide can also carry out a mechanism to kill and eliminate viruses and bacteria by inhibiting their metabolism. The nano-sized zinc oxide has an increased specific surface area and has a surface effect that bulk materials do not have. When a PVC plastic product comes into contact with moisture in the air, the zinc metal component of the zinc oxide present on the surface is ionized and eluted. As a result, it acts as an antibacterial agent against harmful microorganisms such as bacteria. It is preferable to use zinc oxide particles as the inorganic antibacterial agent with a particle size of 20-30 nm, and more preferably with a particle size of 24-26 nm. It is preferable to use 30-40 parts by weight of zinc oxide particles as the inorganic antibacterial agent, and most preferably 35 parts by weight, based on 100 parts by weight of PVC polymer resin. If the zinc oxide particles are outside the above particle size and content range, antibacterial activity may be insufficient, dispersion into the PVC polymer resin may be difficult, or problems may occur with the durability of PVC plastic products.

Cuprous oxide is a copper compound that exhibits antibacterial activity and exhibits higher antibacterial activity compared to copper oxide (CuO). Since cuprous oxide is easy to leach copper ions, the eluted copper ions can easily inhibit the metabolic function of microorganisms by binding to enzymes or proteins and reducing their activity when they come into contact with microorganisms. Therefore, it is desirable to introduce cuprous oxide together with zinc oxide as an inorganic antibacterial agent. The cuprous oxide particles may have a crystal structure or an amorphous structure. When cuprous oxide particles have a crystal structure, regardless of the crystal structure, they can change the structure of the protein constituting the surface of the bacteria or virus by coordinating with it, thereby inactivating the bacteria or virus. It is preferable to use cuprous oxide particles as the inorganic antibacterial agent with a particle size of 90-100 nm, and more preferably 94-96 nm. It is preferable to use 10-20 parts by weight of cuprous oxide particles as the inorganic antibacterial agent, and most preferably 15 parts by weight, based on 100 parts by weight of PVC polymer resin. If the cuprous oxide particles are outside the above particle size and content range, antibacterial activity may be insufficient, dispersion into the PVC polymer resin may be difficult, or problems may occur with the durability of PVC plastic products.

Copper is an inorganic antibacterial agent that has antibacterial properties and does not deteriorate even in high temperature and high humidity environments and has excellent antibacterial properties. In addition, it does not react with other inorganic antibacterial agents and can exhibit excellent wear resistance, scratch resistance, and durability of PVC plastic products. It is preferable to use copper particles as the inorganic antibacterial agent with a particle size of 150-200 nm, and more preferably 170-180 nm. It is preferable to use 5-10 parts by weight of copper particles as the inorganic antibacterial agent based on 100 parts by weight of PVC polymer resin, and most preferably 7.5 parts by weight. If the copper particles are outside the above particle size and content range, antibacterial activity may be insufficient, dispersion into the PVC polymer resin may be difficult, or the weight of the PVC plastic product may increase, which may cause problems with the durability of the PVC plastic product.

The organic antibacterial agent is preferably 10,10'-oxydiphenoxarsine (OBPA) and zinc 2-pyridinethiol-1-oxide (Zn PTO).

Even when injection molded at high temperatures, the PVC antibacterial masterbatch does not deteriorate the physical properties such as impact resistance and thermal stability of the PVC polymer resin itself by using a mixture of organic antibacterial agents, especially OBPA and Zn PTO, and does not deteriorate the physical properties of the PVC polymer resin itself. In addition, it has the effect of improving antibacterial and antibacterial properties against mold.

As the organic antibacterial agent, it is preferable to use 0.1-0.3 parts by weight, and most preferably 0.2 parts by weight, based on 100 parts by weight of PVC polymer resin. If the content of OBPA is outside the above range, there is a problem of insufficient weather resistance of the PVC antibacterial masterbatch.

It is preferable to use 0.1-0.3 parts by weight of Zn PTO as the organic antibacterial agent, and most preferably 0.2 parts by weight, based on 100 parts by weight of PVC polymer resin. If the content of Zn PTO is outside the above range, there is a problem of insufficient weather resistance of the PVC antibacterial masterbatch.

The stabilizer uses a mechanical/thermal stabilizer to prevent damage to the PVC polymer resin due to mechanical processing or applied heat, and an ultraviolet ray stabilizer to prevent decomposition of the polymer due to ultraviolet rays. The stabilizer preferably uses sodium chloride (NaCl) as a mechanical/thermal stabilizer and hindered amine as an ultraviolet ray stabilizer.

It is preferable to use 0.1-0.3 parts by weight of sodium chloride as the stabilizer, and most preferably 0.2 parts by weight, based on 100 parts by weight of PVC polymer resin. If the sodium chloride content is outside the above range, there is a problem of insufficient weather resistance of the PVC antibacterial masterbatch.

It is preferable to use 1.8-2.0 parts by weight of hindered amine as the stabilizer, and most preferably 1.9 parts by weight, based on 100 parts by weight of PVC polymer resin. If the content of the hindered amine is outside the above range, there is a problem of insufficient weather resistance of the PVC antibacterial masterbatch.

The colorant is also called a pigment, and the colorant is applied to color PVC plastic products. The colorant may be a copper phthalocyanine pigment. The colorant is preferably used in an amount of 5-10 parts by weight, and most preferably 7.5 parts by weight, based on 100 parts by weight of the PVC polymer resin. If the colorant is less than 5 parts by weight, it is difficult to develop the desired color, and if it is more than 10 parts by weight, there is a problem of clumping or reduced light resistance.

In addition, the present invention melts 100 parts by weight of PVC polymer resin and then mixes 10-15 parts by weight of dioctyl phthalate and 5-10 parts by weight of copper particles with a particle size of 150-200 nm with respect to 100 parts by weight of PVC polymer resin to form the first mixture. preparing a mixture; In the first mixture, 10-15 parts by weight of dioctyl phthalate, 30-40 parts by weight of zinc oxide particles with a particle size of 20-30 nm, 10-20 parts by weight of cuprous oxide particles, and oxybiphenoxacin (10,10' -oxydiphenoxarsine, OBPA) 0.1-0.3 parts by weight, zinc 2-pyridinethiol-1-oxide (Zn PTO) 0.1-0.3 parts by weight, sodium chloride 0.1-0.3 parts by weight, hindered amine 1.8 Preparing a second mixture by mixing -2.0 parts by weight and a colorant; Melting and extruding the second mixture at a temperature range of 220-250° C. while stirring; and manufacturing a masterbatch by cooling and cutting the extrudate formed by performing the melting and extrusion.

At this time, the manufacturing method of the PVC antibacterial masterbatch according to the present invention is shown in a flowchart through Figure 1. Hereinafter, the manufacturing method of the PVC antibacterial masterbatch according to the present invention will be described in detail step by step with reference to the flowchart of Figure 1. .

First, the method for producing the PVC antibacterial masterbatch according to the present invention is to melt 100 parts by weight of PVC polymer resin and then add 10-15 parts by weight of dioctyl phthalate and copper particles with a particle size of 150-200 nm based on 100 parts by weight of PVC polymer resin. and mixing 5-10 parts by weight to prepare a first mixture.

In the above step, PVC polymer resin, the main polymer resin applied to the PVC antibacterial masterbatch, and dioctyl phthalate, a plasticizer, are mixed at 50% by weight of the total amount used, and the particle size is 150-200%, which is the largest among the inorganic antibacterial agents used. A first mixture is prepared by mixing 5-10 parts by weight of copper particles of nm.

PVC antibacterial masterbatch is manufactured by melting PVC polymer resin, mixing plasticizers, antibacterial agents, stabilizers, etc., melting and extruding them, and cooling and cutting the formed extrudate. First, melt the PVC polymer resin to remove half of the plasticizer. A uniform mixture can be formed by preparing the first mixture by mixing copper particles, which are the inorganic antibacterial agents with the largest particle size, with .

The polyvinyl chloride (PVC) polymer resin preferably has a degree of polymerization of 800 to 1200. If the degree of polymerization is less than 800, physical properties such as water resistance, acid resistance, and alkali resistance are lowered, and if the degree of polymerization is more than 1200, there is a problem of deterioration in processability, so the degree of polymerization is adjusted by paying attention to the range presented in the present invention.

The dioctyl phthalate is included to improve the processability of the PVC polymer resin and to provide flexibility and elasticity so that the PVC polymer resin can be processed and molded below its decomposition point. The dioctyl phthalate is intended to be used in a total of 20-30 parts by weight based on 100 parts by weight of the PVC polymer resin, and it is preferable to use 10-15 parts by weight when preparing the first mixture, and most preferably, the dioctyl phthalate is used in the PVC polymer resin. Use 12.5 parts by weight per 100 parts by weight of polymer resin.

The copper is an inorganic antibacterial agent that has antibacterial properties and does not deteriorate even in high temperature and high humidity environments and has excellent antibacterial properties. In addition, it does not react with other inorganic antibacterial agents and can exhibit excellent wear resistance, scratch resistance, and durability of PVC plastic products. The copper particles preferably have a particle size of 150-200 nm, and more preferably 170-180 nm. The copper particles are preferably used in an amount of 5-10 parts by weight, and most preferably 7.5 parts by weight, based on 100 parts by weight of the PVC polymer resin. If the copper particles are outside the above particle size and content range, antibacterial activity may be insufficient, dispersion into the PVC polymer resin may be difficult, or the weight of the PVC plastic product may increase, which may cause problems with the durability of the PVC plastic product.

Next, the method for producing the PVC antibacterial masterbatch according to the present invention includes 10-15 parts by weight of dioctyl phthalate, 30-40 parts by weight of zinc oxide particles with a particle size of 20-30 nm, and cuprous oxide particles in the first mixture. 10-20 parts by weight, 10,10'-oxydiphenoxarsine (OBPA) 0.1-0.3 parts by weight, Zinc 2-pyridinethiol-1-oxide (Zn PTO) 0.1- and preparing a second mixture by mixing 0.3 parts by weight, 0.1-0.3 parts by weight of sodium chloride, 1.8-2.0 parts by weight of hindered amine, and a colorant.

In the above step, a second mixture is prepared by applying all of the plasticizer, inorganic antibacterial agent, organic antibacterial agent, stabilizer, and colorant contained in the PVC antibacterial masterbatch presented in the present invention.

The method of realizing the antibacterial effect of the zinc oxide particles is not through a sterilizing effect through photocatalytic activity, but through a mechanism that kills and removes viruses or bacteria by inhibiting their metabolism. The nano-sized zinc oxide has an increased specific surface area and has a surface effect that bulk materials do not have. When the antibacterial fiber comes into contact with moisture in the air, the zinc metal component of the zinc oxide present on the surface is ionized and eluted. It acts as an antibacterial agent against harmful bacteria such as bacteria. The zinc oxide particles preferably have a particle size of 20-30 nm, and more preferably 24-26 nm. The zinc oxide particles are preferably used in an amount of 30-40 parts by weight, and most preferably 35 parts by weight, based on 100 parts by weight of the PVC polymer resin. If the zinc oxide particles are outside the above particle size and content range, antibacterial activity may be insufficient, dispersion into the PVC polymer resin may be difficult, or problems may occur with the durability of PVC plastic products.

Cuprous oxide is a copper compound that exhibits antibacterial activity and exhibits higher antibacterial activity compared to copper oxide (CuO). Since cuprous oxide is easy to leach copper ions, the eluted copper ions can easily inhibit the metabolic function of microorganisms by binding to enzymes or proteins and reducing their activity when they come in contact with microorganisms. Therefore, it is desirable to introduce cuprous oxide together with zinc oxide as an inorganic antibacterial agent. The cuprous oxide particles may have a crystal structure or an amorphous structure. When cuprous oxide particles have a crystal structure, regardless of the crystal structure, they can change the structure of the protein constituting the surface of the bacteria or virus by coordinating with it, thereby inactivating the bacteria or virus. The cuprous oxide particles preferably have a particle size of 90-100 nm, and more preferably 94-96 nm. The cuprous oxide particles are preferably used in an amount of 10-20 parts by weight, and most preferably 15 parts by weight, based on 100 parts by weight of the PVC polymer resin. If the cuprous oxide particles are outside the above particle size and content range, antibacterial activity may be insufficient, dispersion into the PVC polymer resin may be difficult, or problems may occur with the durability of PVC plastic products.

The manufacturing method of the PVC antibacterial masterbatch involves injection molding at high temperature. Even in this case, by using a mixture of organic antibacterial agents, especially OBPA and Zn PTO, the overall physical properties of the PVC polymer resin itself, such as impact resistance and thermal stability, are improved. It does not deteriorate and has the effect of improving antibacterial and antibacterial properties against not only bacteria but also mold.

The OBPA is preferably used in an amount of 0.1-0.3 parts by weight, and most preferably 0.2 parts by weight, based on 100 parts by weight of PVC polymer resin. If the content of OBPA is outside the above range, there is a problem of insufficient weather resistance of the PVC antibacterial masterbatch.

The Zn PTO is preferably used in an amount of 0.1-0.3 parts by weight, and most preferably 0.2 parts by weight, based on 100 parts by weight of the PVC polymer resin. If the content of Zn PTO is outside the above range, there is a problem of insufficient weather resistance of the PVC antibacterial masterbatch.

Mechanical/thermal stabilizers are used to prevent PVC polymer resin from being damaged by mechanical processing or applied heat, and UV stabilizers are used to prevent decomposition of the polymer due to ultraviolet rays. In the present invention, it is preferable to use sodium chloride (NaCl) as a mechanical/thermal stabilizer and hindered amine as an ultraviolet stabilizer.

It is preferable to use 0.1-0.3 parts by weight of sodium chloride, and most preferably 0.2 parts by weight, based on 100 parts by weight of PVC polymer resin. If the sodium chloride content is outside the above range, there is a problem of insufficient weather resistance of the PVC antibacterial masterbatch.

The hindered amine is preferably used in an amount of 1.8-2.0 parts by weight, and most preferably 1.9 parts by weight, based on 100 parts by weight of the PVC polymer resin. If the content of the hindered amine is outside the above range, there is a problem of insufficient weather resistance of the PVC antibacterial masterbatch.

The colorant is also called a pigment, and the colorant is applied to color PVC plastic products. The colorant may be a copper phthalocyanine pigment. The colorant is preferably used in an amount of 5-10 parts by weight, and most preferably 7.5 parts by weight, based on 100 parts by weight of the PVC polymer resin. If the colorant is less than 5 parts by weight, it is difficult to develop the desired color, and if it is more than 10 parts by weight, there is a problem of clumping or reduced light resistance.

Next, the method for producing the PVC antibacterial masterbatch according to the present invention includes the steps of stirring the second mixture and melting and extruding it at a temperature range of 220-250°C.

In this step, the second mixture prepared in the previous step is stirred and melted and extruded at a temperature of 220-250°C to produce an extrudate.

The melting and extruding temperature range is preferably 220-250°C, and more preferably 230-240°C. We intend to manufacture a masterbatch by melting and extruding within the above range.

Next, the method for producing the PVC antibacterial masterbatch according to the present invention includes the step of cooling and cutting the extrudate formed by performing the melting and extrusion to produce the masterbatch.

Finally, the extrudate is cooled and cut to produce the PVC antibacterial masterbatch.

Additionally, the present invention provides a PVC antibacterial window sash containing the above PVC antibacterial masterbatch.

In addition, the present invention provides a photocatalytic non-polluting PVC antibacterial window sash containing the above PVC antibacterial masterbatch.

The PVC antibacterial window sash containing the PVC antibacterial masterbatch according to the present invention does not deteriorate even in a high temperature and high humidity environment, has excellent wear resistance, scratch resistance, and durability, and exhibits excellent antibacterial properties while maintaining excellent antibacterial properties. In addition, it is not polluted by solar ultraviolet rays and can decompose pollutants using a photocatalyst, showing even better performance.

In addition, the present invention

Preparing a first mixture by melting 100 parts by weight of PVC polymer resin and then mixing 10-15 parts by weight of dioctyl phthalate and 5-10 parts by weight of copper particles with a particle size of 150-200 nm based on 100 parts by weight of PVC polymer resin. ;

In the first mixture, 10-15 parts by weight of dioctyl phthalate, 30-40 parts by weight of zinc oxide particles with a particle size of 20-30 nm, 10-20 parts by weight of cuprous oxide particles, and oxybiphenoxacin (10,10' -oxydiphenoxarsine, OBPA) 0.1-0.3 parts by weight, zinc 2-pyridinethiol-1-oxide (Zn PTO) 0.1-0.3 parts by weight, sodium chloride 0.1-0.3 parts by weight, hindered amine 1.8 Preparing a second mixture by mixing -2.0 parts by weight and a colorant;

Melting and extruding the second mixture at a temperature range of 220-250° C. while stirring;

manufacturing a masterbatch by cooling and cutting the extrudate formed by performing the melting and extrusion; and

After making the masterbatch into a gel form, injecting it into an extrusion molding machine with air suction, extruding it into a mold at a constant pressure and speed to produce a PVC window profile through cooling using water cooling. A method of manufacturing a PVC window profile including a step. provides.

At this time, the method for manufacturing a PVC window profile according to the present invention is shown in a flow chart in Figure 2. Hereinafter, the method for manufacturing a PVC window profile according to the present invention will be described in detail step by step with reference to the flow chart in Figure 2.

Up to the step of manufacturing the masterbatch, it can be manufactured by performing the same method as the above-described PVC antibacterial masterbatch manufacturing method.

The PVC window profile manufacturing method according to the present invention uses the PVC antibacterial masterbatch produced in this way, and after making the masterbatch into a gel form, it is injected into an extrusion molding machine (or extrusion molding device) with air suction to maintain a certain pressure in the mold. It involves producing PVC window profiles by extruding at high speed and cooling using water cooling.

In this step, the finished masterbatch is stirred and co-extruded to produce the PVC window profile. As an example, it can be performed using an extrusion molding device as shown in Figure 3. The extrusion molding device includes a hopper into which the PVC antibacterial masterbatch, which is a molding material, is injected, the PVC antibacterial masterbatch is injected in gel form and moved to the mold, a main body including a heater, a heating cylinder, and a screw, and a hopper located between the main body and the mold. It includes a mold to extrude the shape of the blocking plate and PVC window profile.

Hereinafter, the present invention will be explained in more detail by the following examples.

However, the following examples only illustrate the content of the present invention and the scope of the invention is not limited by the examples and experimental examples.

<Example 1> Preparation of PVC antibacterial masterbatch

100 g of p-1000, a PVC polymer resin, was put into a stirrer and melted at a temperature of 180°C. 25 g of dioctyl phthalate and 7.5 g of copper particles with a particle size of 170-180 nm were added thereto and stirred at 2000 rpm. The first mixture was prepared.

In the first mixture, 25 g of dioctyl phthalate, 35 g of zinc oxide particles with a particle size of 24-26 nm, 15 g of cuprous oxide particles with a particle size of 94-96 nm, and 10,10'-oxydiphenoxarsine (OBPA) ) 0.2 g, 0.2 g of zinc 2-pyridinethiol-1-oxide (Zn PTO), 0.2 g of sodium chloride, 1.9 g of hindered amine, and 7.5 g of copper phthalocyanine pigment as a colorant were added to produce 3000 A second mixture was prepared by stirring at rpm.

The second mixture was put into a melt extruder, the internal temperature was set to 235°C, melted and extruded, and the extrudate was cooled and cut to prepare a masterbatch.

<Experimental Example 1> Physical property analysis of PVC antibacterial masterbatch

Wear resistance, tensile strength, tear strength, and elongation tests were performed using the masterbatch prepared in Example 1, and the results are shown in Table 1 below.

Abrasion resistance was measured by the ASTM D 1630 method, tensile strength was measured by the ASTM D412 method, tear strength was measured by the ASTM D624 method, and elongation was measured by the ASTM D412 method (specimen size: horizontal and 15 cm each, test site temperature: 19℃, humidity: 60%).

Wear resistance rate
(%) tensile strength
(kg/ ^cm2 ) Tear strength
(kg/cm) elongation rate
(%) Example 1 968 93 75 352

As shown in Table 1 above, it was confirmed that the PVC antibacterial masterbatch according to the present invention had excellent physical properties. In particular, it was confirmed that the wear resistance, tear strength, and elongation rate were very excellent.

<Experimental Example 2> Analysis of antibacterial activity of PVC antibacterial masterbatch

Antibacterial performance was measured using the masterbatch prepared in Example 1, and the results are shown in Table 2 below.

Antibacterial performance was performed according to KS J 4206, and the test strains were Staphylococcus aureus ATCC 6538 (hereinafter strain 1), Escherichia coli ATCC 25922 (hereinafter strain 2), and Pischeudomonas. Aruginosa (Pseudomonas aeruginosa ATCC 27853; hereinafter strain 3) and Escherichia coli (E.Coli ATCC 25922; hereinafter strain 4) were used. The test conditions were to culture the test bacterial solution at 37 ± 1°C with shaking for 24 hours and then measure the number of bacteria (120 shaking times/min). The test sample weight was 2.0 g, phosphate buffer solution (pH 7.0±2) was used as the neutralization solution, the reduction rate (%) was [(Mb-Mc)/Ma] (Ma: initial number of bacteria in the control sample, Mb: number of bacteria in the control sample after incubation for 24 hours, Mc: number of bacteria in the test sample after incubation for 24 hours).

for strain 1
Antibacterial activity (%) for strain 2
Antibacterial activity (%) for strain 3
Antibacterial activity (%) for strain 4
Antibacterial activity (%) Example 1 98 98 99 99

As shown in Table 2 above, it was confirmed that the PVC antibacterial masterbatch according to the present invention had very excellent antibacterial activity.

Claims (2)

Preparing a first mixture by melting 100 g of PVC polymer resin and then mixing 25 g of dioctyl phthalate and 7.5 g of copper particles with a particle size of 170-180 nm;
In the first mixture, 25 g of dioctyl phthalate, 35 g of zinc oxide particles with a particle size of 24-26 nm, 15 g of cuprous oxide particles with a particle size of 94-96 nm, and 10,10'-oxydiphenoxarsine (OBPA) ) 0.2 g, zinc 2-pyridinethiol-1-oxide (Zn PTO) 0.2 g, 0.2 g sodium chloride, 1.9 g hindered amine and 7.5 g copper phthalocyanine pigment were mixed to form a second mixture. manufacturing a;
Injecting the second mixture into a melt extruder and setting the internal temperature to 235°C to melt and extrude it; and
A method for producing a PVC antibacterial masterbatch comprising: cooling and cutting the extrudate formed by performing the melting and extrusion to produce a masterbatch. delete