JPH1149966A - How to enhance the efficacy of plastic additives - Google Patents

Abstract

(57) [Abstract] [Purpose] A method of adding a functional agent such as a disinfectant or an insect repellent to a plastic in combination with an agent that enhances the efficacy of the plastic in order to reduce deterioration in physical properties and cost increase. [Constitution] When adding a functional drug, 2,2-methylenebis (4,6-di-tert-butylphenyl) phosphate is used.
A method for enhancing the efficacy of a functional drug by using sodium in combination.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a thermoplastic resin having a function enhancer, 2,2-methylenebis (4,4).
The present invention relates to a method for kneading 6-di-tert-butylphenyl) sodium to enhance the efficacy of functional agents such as disinfectants and insect repellents. Specifically, by adding sodium 2,2-methylenebis (4,6-di-tert-butylphenyl) phosphate in combination, compared to adding a functional drug alone,
This is a more effective method.

[0002]

2. Description of the Related Art Addition of antibacterial and fungicide agents and insect repellents to plastic films and molded products is limited to a few agents originally developed for resin addition, and the amount of addition is several percent.
And a large amount of addition to plastic was required. Addition of a few percent of a functional agent significantly reduced the physical properties of plastics, and could not be used as films or molded products.

[0003] In terms of price, the addition amount of several percent significantly increases the cost, and it is considered that practical use is considerably difficult in terms of the balance between cost and functionality.

[0004]

The addition of the functional agent to the plastic must be as small as possible in consideration of the deterioration of the physical properties of the plastic. However, antibacterial and fungicide agents and insect repellents are relatively easy to act directly on the target object and exert their effects in small quantities.However, in the case of plastic processing, functional agents are dispersed throughout the plastic. However, since only a part of the surface acts on the plastic surface, a large amount of a functional agent must be added in order to exert a sufficient effect.

The present invention solves the above-mentioned problems by simultaneously screening a functional drug that exerts its effect by adding a small amount thereof and screening a drug that efficiently transfers the functional drug to the surface of plastic. Was.

[0006]

Means for Solving the Problems As a result of screening a drug for efficiently transferring a functional drug to the surface of a plastic, 2,2-methylenebis (4,6-di-tert-butylphenyl phosphate) has been obtained. ) It has been found that by adding sodium in combination with a functional drug, the same effect can be obtained with a small amount as compared with the case of adding a functional drug alone.

[0007] Sodium 2,2-methylenebis (4,6-di-tert-butylphenyl) phosphate is a drug commercially available as a nucleating agent for a crystalline thermoplastic resin, and not only increases the transparency of plastics but also An additive that increases the rigidity of plastic.

[0008] The material of the plastic can be selected according to the use and purpose. As the thermoplastic used, polyethylene resin, polypropylene resin,
Polyurethane resin, polyacrylic resin, polyamide resin, polystyrene resin, polyvinyl chloride resin, ABS resin and the like can be applied to their molded products, films, textile products and the like. By application, household appliances such as industrial ones, daily necessities for kitchens and bathrooms, clothing, tents, packaging films, agricultural films, fishing nets and ropes for fisheries, OA equipment, computers, etc. It can be widely applied to various industrial uses in addition to precision electric appliances.

[0009] The amount of sodium 2,2-methylenebis (4,6-di-tert-butylphenyl) phosphate added to the plastic is 0.05 to 5.0% by weight (hereinafter referred to as all weight%), preferably. 0.1 to 2.0% is added as it is or as a master batch.

In the present invention, in addition to additives which exert an effect on the plastic surface, such as an antibacterial and fungicide, an insect repellent, and an antistatic agent, a flavoring agent, a coloring agent, an ultraviolet ray inhibitor and an antioxidant are used in combination. be able to. In addition, various kinds of plasticizers, zinc oxide, calcium carbonate, silica, and other finely divided natural minerals can be used for kneading into plastics.

[0011]

The best method for permanently imparting an antibacterial and fungicidal effect and an insect repellent effect to thermoplastics is to directly knead an antibacterial and fungicide and an insect repellent into various resins. However, the antibacterial and fungicide and insect repellent used for this purpose are few drugs originally developed for the addition of plastics. And the like, and practical application was difficult. The sodium 2,2-methylenebis (4,6-di-tert-butylphenyl) phosphate of the present invention makes it possible to easily transfer the function of an additive such as an antibacterial fungicide or an insect repellent to the surface of a plastic. The amount can be kept small.

Hereinafter, the present invention will be described in detail with reference to embodiments. However, the present invention is not limited to these examples.

[0013]

【Example】

(Experimental example 1) 2,2-methylenebis (4,6-di-tert-butylphenyl) phosphate was added to polyethylene pellets.
After adding sodium and a fungicide Amorden SK950 (our product) respectively, a twin screw extruder (PCM3
0: Ikegai Co., Ltd.) at a temperature of 150 to 170 ° C. and then an injection molding machine (SVH-30-50-
P: A plate was prototyped at Yamashiro Seiki Seisakusho Co., Ltd.).
The formulation of the drug is shown in Table 1, and the results of the antifungal test are shown in Table 2.

A test method for mold prevention The mold test for this plate was performed by the following method.

[0015] Anti-mold test: According to JIS Z-2911. Test mold Aspergillus niger F
ERM S-1 Penircillum citrin
um FERM S-5 Cladosporium c
ladosporioidesFERM S-8 Judgment method The display method shown in the following table is used. Indication of mold resistance Mold growth 3 Mold growth inoculated on the sample was not observed. 2 The growth area of the mold inoculated on the sample does not exceed 1/3. 1 The growth area of the mold inoculated on the sample exceeds 1/3. (Note) In this display method, if there is a stop band around the sample in Display 3, the size of the stop band is displayed on the right side in mm.

(Experimental Example 2) Sodium 2,2-methylenebis (4,6-di-tert-butylphenyl) phosphate and an insecticide Aninsen SIB5 were added to polyethylene pellets.
After adding each of our products (our products), the temperature is 150 ~
After compounding at 170 ° C., a plate was prototyped. The drug formulation is shown in Table 4, and the insect repellent test results are shown in Table 5.

Insect repellency test method The insect repellency test for this plate was performed by the following method (intrusion prevention method). As shown in FIG. 1, a sample 3 was laid on a plastic petri dish 2 having a diameter of 4 cm and a height of 0.6 cm.
Put 5g. Between the large and small petri dishes, 4 well-propagated tick culture medium (approximately 10,000 living mite population)
Spread evenly. This is placed on the adhesive sheet 6 and 27 ×
Put the adhesive sheet together in a 13 x 9 cm plastic container for food preservation, fill with saturated saline, cover the container, keep the humidity in the container at about 75%, store it in a thermostat at 25 ° C ± 1 ° C, and store it all day and night. Breed. On the next day, the powdered feed on the sample was collected by the suspended salt solution floating method, and the sample was collected by the water washing method to collect mites and counted, and the repellent rate was calculated by the following formula.

[0018]

(Equation 1) The test was repeated three times in consideration of variations.

[0019]

[Table 1]

[0020]

[Table 2]

[0022]

[Table 3]

[0023]

[Table 4]

[0024]

According to the present invention, when a functional agent is added to a thermoplastic, 2,2-phosphoric acid is used as a function enhancer.
The present invention relates to a method for kneading sodium methylenebis (4,6-di-tert-butylphenyl) to enhance the efficacy of a functional drug. More specifically, by adding sodium 2,2-methylenebis (4,6-di-tert-butylphenyl) phosphate in combination, the efficacy is more enhanced as compared with the case of adding a functional drug alone, and the amount of the functional drug added is reduced. This is a method to reduce the physical properties of plastics and increase the cost.

[Brief description of the drawings]

FIG. 1 is a layout diagram of a petri dish used in an intrusion prevention method in a mite repellent test according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 Petri dish (diameter 9 cm) 2 Petri dish (diameter 4 cm) 3 Test specimen 4 Tick culture medium 5 Powder feed 6 Adhesive sheet

Claims (1)

[Claims] 1. When kneading a functional agent such as a disinfectant or an insect repellent into a thermoplastic plastic, a functional agent is added by using sodium 2,2-methylenebis (4,6-di-tert-butylphenyl) phosphate in combination. A method of enhancing the efficacy of a drug.