CONTAINER FOR CHLORINE-BASED LIQUID BLEACHING AGENT COMPOSITION, AND BLEACHING AGENT ARTICLE

Abstract

Provided is a container for chlorine-based liquid bleaching agent composition, which accommodates a chlorine-based liquid bleaching agent composition therein and has excellent transparency, in which even when storied over a long period of time, the generation of a crack is suppressed.

The container of the present invention is a container for chlorine-based liquid bleaching agent composition containing 90 to 99.5 parts by mass of a polyester resin (A) and 0.5 to 10 parts by mass of a polyamide (B) (a sum total of the polyester resin (A) and the polyamide resin (B) is 100 parts by mass), wherein the polyester resin (A) has a structural unit derived from a dicarboxylic acid and a structural unit derived from a diol, 80 mol % or more of the structural unit derived from a dicarboxylic acid being a structural unit derived from terephthalic acid, and 80 mol % or more of the structural unit derived from a diol being a structural unit derived from ethylene glycol; and the polyamide resin (B) has a structural unit derived from a diamine and a structural unit derived from a dicarboxylic acid, 80 mol % or more of the structural unit derived from a diamine being a structural unit derived from xylylenediamine, and 80 mol % or more of the structural unit derived from a dicarboxylic acid being a structural unit derived from adipic acid.

Claims

1. A container for chlorine-based liquid bleaching agent composition comprising 90 to 99.5 parts by mass of a polyester resin (A) and 0.5 to 10 parts by mass of a polyamide (B) (a sum total of the polyester resin (A) and the polyamide resin (B) is 100 parts by mass), wherein the polyester resin (A) has a structural unit derived from a dicarboxylic acid and a structural unit derived from a diol, 80 mol % or more of the structural unit derived from a dicarboxylic acid being a structural unit derived from terephthalic acid, and 80 mol % or more of the structural unit derived from a diol being a structural unit derived from ethylene glycol; and the polyamide resin (B) has a structural unit derived from a diamine and a structural unit derived from a dicarboxylic acid, 80 mol % or more of the structural unit derived from a diamine being a structural unit derived from xylylenediamine, and 80 mol % or more of the structural unit derived from a dicarboxylic acid being a structural unit derived from adipic acid.

2. The container for chlorine-based liquid bleaching agent composition according to claim 1, wherein the chlorine-based liquid bleaching agent composition comprises 0.5 to 15 mass % of sodium hypochlorite.

3. The container for chlorine-based liquid bleaching agent composition according to claim 1, wherein the chlorine-based liquid bleaching agent composition comprises a surfactant.

4. The container for chlorine-based liquid bleaching agent composition according to claim 1, wherein the chlorine-based liquid bleaching agent composition comprises an alkaline agent.

5. The container for chlorine-based liquid bleaching agent composition according to claim 1, wherein the container further comprises an epoxy-functional polymer (C) including a styrene unit represented by the following formula (c1) and a glycidyl (meth)acrylate unit represented by the following formula (c2): ##STR00006## wherein R.sup.1 to R.sup.4 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms.

6. The container for chlorine-based liquid bleaching agent composition according to claim 1, wherein the container is a single-layer container.

7. A bleaching agent article comprising a container having a chlorine-based liquid bleaching agent composition accommodated therein, the container comprising 90 to 99.5 parts by mass of a polyester resin (A) and 0.5 to 10 parts by mass of a polyamide (B) (a sum total of the polyester resin (A) and the polyamide resin (B) is 100 parts by mass), wherein the polyester resin (A) has a structural unit derived from a dicarboxylic acid and a structural unit derived from a diol, 80 mol % or more of the structural unit derived from a dicarboxylic acid being a structural unit derived from terephthalic acid, and 80 mol % or more of the structural unit derived from a diol being a structural unit derived from ethylene glycol; and the polyamide resin (B) has a structural unit derived from a diamine and a structural unit derived from a dicarboxylic acid, 80 mol % or more of the structural unit derived from a diamine being a structural unit derived from xylylenediamine, and 80 mol % or more of the structural unit derived from a dicarboxylic acid being a structural unit derived from adipic acid.

8. The bleaching agent article according to claim 7, wherein the chlorine-based liquid bleaching agent composition comprises 0.5 to 15 mass % of sodium hypochlorite.

9. The bleaching agent article according to claim 7, wherein the chlorine-based liquid bleaching agent composition comprises a surfactant.

10. The bleaching agent article according to claim 7, wherein the chlorine-based liquid bleaching agent composition comprises an alkaline agent.

11. The bleaching agent article according to claim 7, wherein the container further comprises an epoxy-functional polymer (C) including a styrene unit represented by the following formula (c1) and a glycidyl (meth)acrylate unit represented by the following formula (c2): ##STR00007## wherein R.sup.1 to R.sup.4 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms.

12. The bleaching agent article according to claim 7, wherein the container is a single-layer container.

Description

EXAMPLES

[0196] The present invention is hereunder described in more detail by way of Examples, which should not be construed as limiting the present invention thereto. Materials, analysis and measurement methods, and production methods of molded product employed in the Examples and Comparative Examples are described below.

1. Materials

[Container]

<Polyester Resin (A)>

[0197] A PET resin (trade name: Unipet BK-2180, manufactured by Nippon Unipet Co., Ltd., intrinsic viscosity=0.83 dL/g; free from a sulfonic acid metal salt group) was used. The resin which had been dried by a dehumidification drier at 150 C. for 8 hours was used.

<Polyamide Resin (B)>

[0198] A 50-L jacketed reactor equipped with a stirrer, a partial condenser, a condenser, a thermometer, a driptank, and a nitrogen gas inlet pipe was charged with 15 kg of adipic acid and 15 g of sodium hypophosphite monohydrate and thoroughly purged with nitrogen; the temperature was increased to 180 C. under a small amount of a nitrogen gas stream to uniformly melt the adipic acid; and thereafter, 13.8 kg of m-xylylenediamine was dropped over 170 minutes while stirring the inside of the system. Meanwhile, the internal temperature was continuously increased to 245 C. Water produced by polycondensation was removed outside the system through the partial condenser and the condenser.

[0199] After completion of dropping of m-xylylenediamine, the internal temperature was further increased to 260 C.; the reaction was continued for one hour; and thereafter, a polymer was taken out as a strand from a nozzle in a lower part of the reactor and cooled with water, followed by palletization to obtain a polymer.

[0200] Subsequently, the polymer obtained through the aforementioned operations was charged in a 50-L rotary tumbler equipped with a heating jacket, a nitrogen gas inlet pipe, and a vacuum line; and an operation of reducing the pressure of the inside of the system while rotating and then returning to atmospheric pressure using nitrogen having a purity of 99 volume % or more was performed three times. Thereafter, the temperature of the inside of the system was increased to 140 C. under a nitrogen gas stream. Subsequently, the pressure of the inside of the system was reduced; the temperature was further continuously increased to 190 C.; the temperature was kept at 190 C. for 30 minutes; and nitrogen was then introduced to return the pressure of the inside of the system to atmospheric pressure, followed by cooling to obtain a polyamide. The resulting polyamide had a relative viscosity of 2.7.

<Terminating Reactant>

Joncryl ADR-4368: Manufactured by BASF SE

[Chlorine-Based Liquid Bleaching Agent Composition]

[0201] Purelox-S (manufactured and sold by Oyalox Co., Ltd., sodium hypochlorite (6 mass %), free from a surfactant, sodium hydroxide: 0.2% or less, pH: 11.7) [0202] Product name: Daidokoroyo Hyohakuzai (Bleaching Agent for Kitchen), selling agency: AEON Co., Ltd (sodium hypochlorite (6 mass %), surfactant (alkylamine oxide), sodium hydroxide, pH: 12 to 13)

2. Evaluation Methods

[Number of Times of Dropping Until Crack Generation]

[0203] A 500-mL bottle obtained in each of the Examples as mentioned later was charged with 500 mL of the chlorine-based liquid bleaching agent composition and sealed with a cap for PET bottle, thereby preparing a bleaching agent article before storage. In the Examples and Comparative Examples of Yes of the surfactant, the aforementioned Daidokoroyo Hyohakuzai was used, and in the Examples of No of the surfactant, the aforementioned Purelox-S was used. In addition, in the Examples in which the sodium hypochlorite concentration was 2.5 mass %, the aforementioned Daidokoroyo Hyohakuzai or Purelox-S was used after being properly diluted with pure water.

[0204] The aforementioned PET bottle having the chlorine-based liquid bleaching agent composition accommodated therein was stored in a thermostat chamber at 40 C. for 5 months, and the bottle taken out from the thermostat chamber was naturally cooled to room temperature, thereby preparing a bleaching agent article after storage.

[0205] The bleaching agent article before and after storage was freely dropped from the bottle bottom from a height of 80 cm towards a concrete floor. Dropping was repeated until a crack of the bottle was confirmed, and the number of times at which the crack was confirmed was recorded. The dropping was carried out while limiting the number of times of dropping to 100 times.

[Transparency]

[0206] The evaluation criteria are as follows. [0207] A: Visibility of the contents is thoroughly revealed. [0208] B: Visibility of the contents is remarkably inferior.

Examples 1 to 16 and Comparative Examples 3, 4, 7, and 8

[0209] Predetermined amounts of the polyester resin (A) and the polyamide resin (B) were weighed and dry-blended; and the blend was charged into a preform injection molding machine (model: SE130DU-CI, manufactured by Sumitomo Heavy Industries, Ltd.) and subjected to injection molding under the following conditions, thereby preparing a single-layer preform.

[0210] The single-layer preform molding conditions were as follows. [0211] Mass of one preform: 25 g [0212] Hot runner/cylinder temperature: 285 C. [0213] Hot runner nozzle temperature: 290 C. [0214] Die cooling water temperature: 15 C. [0215] Molding cycle time: 33 sec

[0216] Furthermore, the prepared single-layer preform was cooled and then subjected to biaxial stretch blow molding using a blow molding apparatus (model: EFB-1000ET, manufactured by Frontier Inc.) under the following conditions, thereby obtaining a single-layer bottle (height: 223 mm, body diameter: 65 mm, volume: 500 mL, wall thickness: 330 m, mass: 25.0 g). The die was of a 500-mL petaloid bottom type, and the surface temperature before blow (surface temperature after preform heating) was 107 to 110 C.

[0217] The biaxial stretch blow molding conditions are as follows. [0218] Preform heating temperature: 107 to 110 C. [0219] Pressure for stretch rod: 0.5 MPa [0220] Primary blow pressure: 0.5 MPa [0221] Secondary blow pressure: 2.5 MPa [0222] Primary blow delay time: 0.32 sec [0223] Primary blow time: 0.28 sec [0224] Secondary blow time: 2.0 sec [0225] Blow exhaust time: 0.6 sec [0226] Die temperature: 30 C. Using the thus-obtained single-layer bottle, the evaluations were performed based on the aforementioned methods. The results are shown in Tables 1 and 2.

Comparative Examples 1, 2, 5, and 6

[0227] Single-layer bottles were prepared and evaluated in the same manners as in Example 1, except for using only the polyester resin (A). The results are shown in Tables 1 and 2.

Example 17

[0228] A master batch containing the polyester resin (A) and the terminating reactant (Joncryl ADR-4368) in a (polyester resin (A))/(terminating reactant) proportion of 70/30 (mass ratio) was prepared.

[0229] A single-layer bottle was prepared and evaluated in the same manners as in Example 1, except for adding 0.1 parts by mass of the aforementioned master batch to 99.9 parts by mass of the sum total of the polyester resin (A) and the polyamide resin (B). The results are shown in Table 2.

TABLE-US-00001 TABLE 1 Example Comparative Example 1 2 3 4 5 6 7 8 1 2 3 4 Container Polyester resin (A) 99 97 95 93 99 97 95 93 100 100 99.7 85 composition (wt %) Polyamide resin (B) 1 3 5 7 1 3 5 7 0 0 0.3 15 (wt %) Terminating reactant (wt %) Liquid Sodium hypochlorite 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 bleaching concentration (wt %) agent Presence or absence of No No No No Yes Yes Yes Yes No Yes No No composition surfactant Transparency A A A A A A A A A A A B Drop test Number of Before >100 >100 >100 >100 >100 >100 >100 >100 >100 >100 >100 >100 times of storage dropping (times) until crack After 52 >100 >100 >100 21 68 >100 >100 12 0 15 >100 generation storage (times)

TABLE-US-00002 TABLE 2 Example Comparative Example 9 10 11 12 13 14 15 16 17 5 6 7 8 Container Polyester resin (A) 99 97 95 93 99 97 95 93 96.97 100 100 99.7 85 com- (wt %) position Polyamide resin (B) 1 3 5 7 1 3 5 7 3 0 0 0.3 15 (wt %) Terminating reactant 0.03 (wt %) Liquid Sodium hypochlorite 6 6 6 6 6 6 6 6 6 6 6 6 6 bleaching concentration agent (wt %) com- Presence or No No No No Yes Yes Yes Yes Yes No Yes No No position absence of surfactant Transparency A A A A A A A A A A A A B Drop test Number of Before >100 >100 >100 >100 >100 >100 >100 >100 >100 >100 >100 >100 >100 times of storage dropping (times) until crack After 34 89 >100 >100 13 46 >100 >100 53 5 0 6 >100 generation storage (times)

[0230] In accordance with Tables 1 and 2, in comparison with Comparative Examples 1, 2, 5, and 6 not containing the polyamide resin (B) and Comparative Examples 3 and 7 in which the content of the polyamide resin (B) is low, in Examples 1 to 17 satisfying the constituent features of the present invention, it was noted that the number of times of dropping until crack generation is large, and even in the case of accommodating the chlorine-based liquid bleaching agent composition, the generation of a crack is suppressed, and the ESCR is improved. In addition, in Comparative Examples 4 and 8 in which the content of the polyamide resin (B) is high, it was noted that though the drop test is excellent, the transparency is inferior.