JP3104404B2 - Antibacterial resin and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial resin used for household goods and the like.

[0002]

2. Description of the Related Art In recent years, most household products are made of resin, but most resins are habitats of microorganisms, and there is a demand for improved cleanliness.

[0003]

Accordingly, a number of antibacterial agents have been proposed, and their safety to the human body and the environment has been discussed again.

[0004] Microbial contamination on the resin surface starts when the microorganisms come into contact with water containing a nutrient source on the resin, and further adheres dust and the like, eventually leading to the generation of slime and the growth of fungi.

[0005] Further, it is difficult to ascertain the sustainability of these many proposed antibacterial agents, and contamination has gradually started during use.

Therefore, the above-described series of microbial contamination is prevented,
In addition, there is a demand for an antimicrobial resin that is highly safe for the human body and does not easily lead to environmental pollution.

[0007]

SUMMARY OF THE INVENTION An antibacterial resin containing an antibacterial agent and an antifouling agent contained in and adsorbed on a holding material is used.

Further, an antibacterial resin in which an antibacterial material containing and adsorbing an antifouling agent is added to a holding material carrying an antibacterial agent is used.

[0009] Further, the method of manufacturing includes a step of bleeding out the antifouling agent and the antibacterial agent to the resin surface. By using the resin of the present invention, it can be confirmed that bleed-out remains as it is over a long period of time. However, bleed-out is performed in a necessary amount in advance by applying heat or the like in a manufacturing process.

[0010]

[Function] By containing and adsorbing an antifouling agent in a holding material and holding the antifouling agent in the resin as a supply source, it is possible to supply the antifouling agent when a bleed-out phenomenon occurs on the resin surface. The stain resistance of the resin surface can be imparted over a long period of time.

Further, the antifouling agent contained in the antibacterial agent-carrying material is adsorbed on the antibacterial agent-supporting material, and the antifouling agent is used as a supply source in the resin, so that the antifouling agent at the time of causing the bleed-out phenomenon on the resin surface is removed. If it is possible to supply the resin and provide the antifouling property of the resin surface for a long period of time, and to maintain the physical properties of the resin by minimizing the necessary amount of filler components incorporated in the resin, Instead, the moisture absorption characteristics of the antimicrobial carrier material can be improved, and the durability of the resin can be improved.

The effect of the antifouling agent, which inherently makes the foreign substances hardly adhere to the resin surface, is exerted as it is, and the adhesion of organic substances, which are nutrient sources for microorganisms, is suppressed.

Further, since the melting point of the antifouling agent used in the present invention is equal to or lower than the molding temperature of the resin to be added, when the resin is molded, it bleeds out to the resin surface by the heat of the molding. By increasing the concentration of the antifouling agent in the resin only on the resin surface, the antifouling property of the resin surface can be improved with a small amount of addition.

Even if the resin surface is polished during continuous use, if a new resin surface comes to the surface, a new antifouling agent and antibacterial agent are also present there, so that the antibacterial performance is hardly reduced. Furthermore, during continuous use, the bleed-out phenomenon is occurring gradually, though only slightly.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of an antibacterial resin according to an embodiment of the present invention. 1 is a polypropylene main resin, 2 is a silver silica gel antibacterial agent particle, 3 is an average particle size of about 1
The holding material 4 made of a 5 μm tetrafluorinated resin powder is an antifouling agent made of an oil having a trifluoride structure at the end of the main chain. The silver silica gel antibacterial agent particles 2 and the antifouling agent 4 are obtained by kneading the holding material 3 adsorbed in advance at the time of molding the resin 1.

Next, the silver silica gel-based antibacterial agent particles 2 will be described together with the production method. 100 parts by weight of a water-soluble silver salt such as silver acetate is added to and dissolved in water containing no chlorine, and a mixture of sodium sulfite and sodium hydrogen sulfite 4
50 parts by weight, and a water-soluble salt of sodium thiosulfate 30
0 parts by weight were sequentially mixed and dissolved with sufficient stirring to obtain an aqueous solution of a silver complex salt. The weight of sodium thiosulfate is indicated as the weight of the hydrate _{Na 2 S 2 O 3 · 5H} 2 O.

The carrier used for the silver silica gel antibacterial agent particles of the present embodiment is a B-type silica gel powder described in "JIS Z 0701 Silica gel desiccant for packaging". This B-type silica gel powder has a low moisture absorption rate at low humidity, a high moisture absorption rate at high humidity, and a high total moisture absorption at high humidity, and has an average particle size of about 8 μm.

The silica gel powder was dried at 180 ° C. for 2 hours or more. The silver thiosulfato solution was mixed with 100 parts by weight of the above silica gel so that the silver component was 2 parts by weight. Next, the water absorbed in the solvent and the carrier was promptly removed. Next, this was pulverized to a predetermined particle size to obtain silica gel carrying an antibacterial material.

As a coating material, 100 parts by weight of the above silica gel is dispersed in a solution obtained by diluting 100 parts by weight of tetraethoxysilane with 100 parts by weight of ethyl alcohol, and 20 parts by weight of pure water is added thereto. Was hydrolyzed to coat at least a part of the surface of the silica gel. Next, this was dried to obtain silver silica gel-based antibacterial agent particles 2.

3% of the silver silica gel antibacterial agent particles 2
2% holding material containing 0.5% antifouling agent, 1% calcium stearate as dispersant, titanium oxide 3 as coloring material
% Was added to a polypropylene resin, and the mixture was processed into a resin molded product at a molding temperature of about 210 ° C. During molding, the antifouling agent 4 has a higher fluidity during resin molding because its melting point is lower than the resin molding temperature, and has a lower polarity than the resin. Improve the water repellency of

The experimental results of this example and the conventional example manufactured with such a configuration are shown in Table 1 for the number of bacteria on the surface of the resin molded product.

[0023]

[Table 1]

From these results, the antibacterial resin of the present embodiment exhibits antibacterial properties on the surface and maintains cleanliness.

(Embodiment 2) FIG. 2 is a sectional view of an antibacterial resin according to another embodiment of the present invention. 5 is ABS body resin, 6
Is a silver zeolite-based antibacterial agent particle, 7 is an antifouling agent composed of silicon oil at the end of the main chain, 8 is a holding material of silicon rubber powder, and the antifouling agent 7 is adsorbed on the holding material 8 in advance.
The silver zeolite-based antibacterial agent particles 6 and the antifouling agent 7 are obtained by kneading the holding material 8 adsorbed in advance at the time of molding the resin 5.

3% silver zeolite antibacterial agent particles 6
5% of antifouling agent 7 adsorbed on 2% of holding material 8,
Further, a mixture of 1% of an antifouling agent and 3% of titanium oxide as a coloring agent is added to the ABS resin 5 and kneaded.
When this is molded at 240 ° C., the antifouling agent 7 has a high fluidity during resin molding because its melting point is lower than the resin molding temperature,
Moreover, since the polarity is lower than that of the resin, the resin bleeds out near the surface of the resin molded product to improve the water repellency of the surface of the resin molded product.

The antibacterial properties of the surface of the antibacterial resin of this example manufactured in such a configuration were evaluated in the same manner as in Example 1. As a result, the antibacterial property was exhibited on the resin surface and the cleanliness was maintained. I got

Further, even if the resin surface is polished during continuous use, if a new resin surface comes to the surface, a new antifouling agent and an antibacterial agent are also present there, so that the antibacterial performance is hardly reduced. Have both.

[0029]

As is clear from the above description, according to the present invention, an antibacterial agent having an antibacterial effect by contacting microorganisms on the resin surface, and a contact angle on the resin surface is increased to suppress adhesion and growth of microorganisms. By using together with an antifouling agent having the effect of reducing the number of microorganisms, an antibacterial effect that is safe for the human body and has little environmental pollution can be obtained by utilizing the characteristics at the time of microbial growth.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of an antibacterial resin according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of an antibacterial resin according to another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 main resin 2 silver silica gel antibacterial agent particles 3 holding material 4 antifouling agent 5 main resin 6 silver zeolite antibacterial particles 7 antifouling agent 8 holding material

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Atsushi Nishino 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-5-255547 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) C08K 3/00-13/08 C08L 1/00-101/16

Claims (9)

(57) [Claims] 1. An antimicrobial resin composite , wherein an antimicrobial material in which an antimicrobial agent and an antifouling agent are contained and adsorbed in a holding material is added to a thermoplastic resin . 2. An antibacterial resin composite , wherein an antibacterial material containing an antifouling agent and adsorbed thereto is added to a thermoplastic resin on a holding material carrying the antibacterial agent. 3. An antibacterial agent according to claim 1, wherein the antibacterial agent and the antifouling agent are added to the resin, and a step of bleeding out the antifouling agent and the antibacterial agent to the resin surface is provided. Method for producing conductive resin composite . 4. A soil release agents are antibacterial resin multi according to claim 1 or 2, wherein the retaining material or antifouling component alone was contained adsorbed antifouling component is at least one
Coalescing . 5. The antibacterial agent according to claim 1 or 2, wherein the silver thiosulfato complex salt is supported on silica gel and at least a part of its surface is coated with a hydrolyzate of tetraalkoxysilane. Antibacterial resin described
Complex . 6. A holding material supporting an antibacterial agent is characterized in that a silver thiosulfato complex salt is supported on silica gel and at least a part of its surface is coated with a hydrolyzate of tetraalkoxysilane. The antibacterial resin composite according to claim 1 or 2. 7. The antibacterial resin composite according to claim 1, wherein the antifouling agent is a compound whose melting point is equal to or lower than the molding temperature of the resin to be added. 8. The antibacterial resin composite according to claim 1, wherein the antifouling agent is a fluorine compound. 9. The antibacterial resin composite according to claim 1, wherein the antifouling agent is a silicone resin compound.
Body .