JP2000160179A - Lubricant for sliding part and container coated with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lubricant capable of directly using a container having a conventionally existing pump type dispenser device without fouling contents which are soluble in water in the container or without converting into oil droplets and without suspending in the contents and to provide a container utilizing the lubricant. SOLUTION: This lubricant is applied to sliding members 6 and 7 of a dispenser device 2 designed to apply a discharge pressure to contents such as a medicine or a cosmetic housed in a container 1 by sliding the sliding members 6 and 7 receiving an external force and thereby discharge the contents from the interior of the container 1. In this case, the lubricant is composed of a first element comprising at least one selected from polydimethylsiloxane and polyphenylmethylsiloxane and a second element comprising at least one selected from a polyethylene oxide and a polypropylene oxide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricant used for a container containing, for example, cosmetics, medicines and the like as a container, and a container to which the lubricant is applied.

[0002]

2. Description of the Related Art For example, in the field of cosmetics and pharmaceuticals, a user uses a button of a dispenser device (pump) attached to the head of a container as a means for discharging the contents (contents) contained in the container. Recently, a so-called pump type in which the contents are discharged from a container by being pressed down has come to be often seen. This kind of container can be said to be a user-friendly container because there is no need to tilt or shake the container when using it to shake out the contents.

However, in this pump type, the discharge amount is substantially constant in one stroke of the pressed button, and in order to obtain a desired amount, the pressing operation must be repeated a plurality of times after the return of the button. Here, if the container is caught or a large amount of force is required at the time of pressing, the user (customer) does not purchase the product due to poor usability of the container.

Therefore, in the conventional pump type, a sliding portion such as a plunger which forms a part of a discharge mechanism which is depressed is improved in sliding with a button depressed so that a burden is imposed on a user. Lubricant is applied to prevent it from being applied.

[0005]

The lubricants described above are selected so as not to affect the safety and the contents of the components even if they are mixed with the contents. Generally, polydimethylsiloxane is used. Have been. However,
Because this polydimethylsiloxane is insoluble in water,
When the contents (containers) in the container are water-soluble, they may be polluted or float in the containers as oil droplets. As mentioned above, there is no influence on safety and contents, and no trouble is caused by use. However, cosmetics, pharmaceuticals and other products are particularly important in terms of their image.

[0006] Here, a pump constituting a discharge mechanism attached to the container used above will be briefly described.
Generally, a button for pressing is provided at the top, and when the button is pressed downward, a discharge pressure is generated to apply pressure to the contents in the container and to push the container to the outside.
The internal structure is well-known, and a check valve is usually provided to prevent the content once sucked into the pump from returning to the container, and to prevent the content corresponding to the discharge amount for one time from being predetermined. Area (reservoir). When the button is pressed in this state, a sliding agent such as a plunger that is pressed down integrally with the button slides on the fixed portion of the pump body and slides so as to reduce the volume of the storage portion. It has become. On the other hand, on the side of the plunger, there is formed a passage communicating the discharge port provided in the button with the storage section. Therefore,
When the button is pressed, a pressing force is generated in the contents in the storage portion, but since the backflow is prevented, the pressure becomes the discharge pressure, and the contents are discharged vigorously from the discharge port.

In the pump having the above configuration, it is necessary for the plunger, which is a sliding portion, to slide into the storage portion in order to discharge the contents, and to maintain the plunger to move smoothly. The above-mentioned lubricant is essential. Therefore, there has been a demand for solving the problems of the above-described lubricant contamination and oil droplets. Therefore, an object of the present invention is to make it possible to use a container equipped with a conventional pump-type dispenser device as it is, and when the contents (containment) in the container are water-soluble, they can be polluted or become oil droplets. It is an object of the present invention to provide a lubricant that does not float in a stored material and to provide a container using the lubricant.

[0008]

In order to achieve the above object, according to the present invention, first, a sliding member which has been subjected to an external force slides a container such as a medicine, a cosmetic or the like stored in a container. A lubricant applied to the sliding member of the dispenser device that is designed to apply a discharge pressure to the container by moving the container and discharge the container from the container, wherein the lubricant is polydimethylsiloxane and polyphenylmethyl. The present invention solves the above problem as a lubricant for a sliding portion composed of a first element composed of at least one selected from siloxane and a second element composed of at least one selected from polyethylene oxide and polypropylene oxide. is there.

That is, the first and second pump type dispenser devices which are mounted on a container as described above and require a lubricant in a sliding portion, and particularly those which may come into contact with and mix with the contents. The problem is solved by applying the invention consisting of elements. The ratio of the first element and the second element can be selected in a considerably wide range of 10 to 70% by weight and the second element of 30 to 90% by weight.

The viscosity of this lubricant is 300 to 2000 mP.
aS is preferred. The viscosity changes depending on the degree of polymerization of the lubricant, and the higher the degree of polymerization, the higher the viscosity. Where its value is
If it is less than 300, it is difficult to ride even if it is applied to the sliding part.
If it exceeds 2,000, the viscosity is too high and smoothness cannot be obtained. And specifically, a dispenser which accommodates medicines, cosmetics, and the like therein, and is designed to apply a discharge pressure to the above-mentioned stored material and discharge it when the sliding member subjected to external force slides. A container with a discharge function provided with a device, wherein the sliding member is selected from a first element composed of at least one selected from polydimethylsiloxane and polyphenylmethylsiloxane, and selected from polyethylene oxide and polypropylene oxide. It can be provided as a container to which a lubricant constituted by the second element consisting of at least one is applied.

[0011]

Embodiments of the present invention will be described below. The inventor of the present invention has concluded that if the content in the container is water-soluble because the conventionally used polydimethylsiloxane is insoluble in water, it may become polluted or float in the container as oil droplets. As a result of diligent research to solve the problem of incorporation, the introduction of a hydrophilic group, ethylene oxide or propylene oxide, into the siloxane part, which originally functions as a lubricant, makes it soluble in water. Attention has been paid to the present invention. With the lubricant of the present invention, the above-mentioned problems of contamination of the content components or oil droplets floating in the content can be solved.

Specifically, in the present invention, first, at least one selected from polydimethylsiloxane (PDMS) and polyphenylmethylsiloxane (PPMS) is used as the first element. This first element is a part of the lipophilic base constituting the main body as a lubricant, so as to perform a smooth function when applied to the sliding portion of the pump. More specifically, it is necessary that a methyl group is added to at least silicon of the siloxane portion (Si-O).

[0013] The lubricant of the present invention further has a second element, which comprises at least one selected from polyethylene oxide (PEO) and polypropylene oxide (PPO). The first element is provided with hydrophilicity. After all, the first and second elements are integrated to constitute the lubricant of the present invention having a lubricating function and a hydrophilic function. The lubricant of the present invention is a copolymer of polyether and polysiloxane and has both lubricity and water solubility by having a structure as a surfactant (amphiphilic). In other words, it has a structural feature that a polyether chain as a hydrophilic group that imparts a hydrophilic function to the present lubricant and a polysiloxane chain as a lipophilic group that imparts a lubricating function to the present lubricant are present in the same molecule. The PDMS and PPMS in the first element may be used alone or in combination. Further, only one or both of PEO and PPO of the second element may be used at the same time.

For example, the state of the lubricant of the present invention in which all of the above elements are used has the following structure. For example, a polyether having an allyl group at a terminal and a polysiloxane partially having a hydrosilyl group are added. It can be obtained by reacting.

[0015]

Embedded image

Here, from the left, the above PDMS, PPMS, PEO and PP
O is a phenyl group, and x, y, z,
w represents the degree of polymerization of each element. As described above, since the lubricant must be a copolymer having both functions of lipophilicity and hydrophilicity, the lipophilic group (polysiloxane chain) and the hydrophilic group (polyether chain) are left and right in this respect. It will take the form of a block copolymer present in block form.
However, the arrangement between PDMS and PPMS, which are lipophilic groups, can take any of block, alternating, and random copolymerization forms, and the same applies to the arrangement of PEO and PPO, which are hydrophilic groups. is there.

The degrees of polymerization x, y, z and w can be arbitrarily determined to some extent, but need to be determined in consideration of the following items. That is, since the sum of the degrees of polymerization (x + y + z + w) affects the viscosity, the preferred viscosity of the present lubricant should be in the range of 300 to 2000 mPa.S. In the present lubricant characterized in that a lipophilic group and a hydrophilic group coexist, if the lipophilic group is too large, the hydrophilicity may be lost, while if the hydrophilic group is too large, the lubricating function is impaired. Therefore, it is necessary to determine that these two functions are balanced.

Since the example shown in the above Chemical Formula 1 uses all the elements, it can be used as the present lubricant from all nine kinds by selecting the first element and the second element. I understand. In addition, the polymerization ratio of the first element and the second element is determined by considering the above-mentioned point,
10 to 70% by weight, the second element is selected from 30 to 90% by weight. Thus, any choice can be made over a fairly wide range. From the viewpoint of maintaining hydrophilicity and lubricating function, for example, PEO is 35 to 50%, PPO is 40 to 42%, and PDMS is 9 to
Preferably, it is used at a rate of 25%.

The viscosity of the lubricant of the present invention is 300 to 2000 mP.
Although it is the range of aS, the viscosity may be adjusted within the above-described range according to the state of the sliding portion to be used, and a range in which the feel when the pump is pressed down may be smoothly selected. Next, a case where the lubricant of the present invention is applied to a specific container will be described. In the container 1 shown in FIG. 1, cosmetics, medicines, and the like are stored as contents N, and a so-called pump-type dispenser device 2 is attached to the upper portion thereof via a screw cap S. Since the present invention does not relate to the configuration itself of the dispenser device 2, its discharge mechanism will be briefly described.

A button 3 provided on the top of the dispenser device 2 is set to be able to be pressed downward, and is urged by a coil spring 4 to be pushed upward during standby. The button 3 has a nozzle 5 as a discharge port.
Is provided. The nozzle 5 discharges in a mist or liquid state depending on the contents. The nozzle 5 is connected to a passage communicating from the inside of the button 3 to a pipe 11 suspended in the container 1 to suck up the contents N.

Below the movable button 3, there are provided first and second pressurizing plungers 6, 7 which move integrally. On the other hand, the screw cap S is provided with a cylinder 8, a filling rod 9, and the like. Here, each of the plungers 6 and 7, the cylinder 8 and the filling rod 9 constitute a fluid passage 10 from the pipe 11 inside the container 1 to the nozzle 5.
The fluid passage 10 is configured such that a predetermined amount of stored matter is stored before the pressing operation.

Here, when the button 3 is pressed down against the coil spring 4, the plungers 6, 7 are moved downward, whereby the volume of the fluid passage 10 is reduced, and the stored contents are pressurized. The liquid is discharged from the nozzle 5 in the form of a mist or a liquid. The plungers 6, 7 that move up and down with respect to the open end Sa of the screw cap S on the fixed side so that the button 3 can be pressed down smoothly with the dispenser device 2 used in this manner are lubricated with the above-described structure. Agent J
Is applied. As a result, the user can discharge and use a desired amount of the contents without causing any discomfort due to the operation of pressing down the button 3.

[0023] Even if the lubricant of the present invention is mixed with the content, the lubricant may be contaminated in the container or floated as oil droplets in the container as in the prior art. There is no harm to my heart. Also, the above description is for cosmetics,
Pharmaceuticals have been described as examples, but the present invention is not limited to these, and it goes without saying that the present invention can be applied to other items that may cause similar problems.

[0024]

As is apparent from the above description, according to the lubricant of the present invention, a conventional container equipped with a pump-type dispenser can be used without any mechanical improvement. It is possible, and even if it comes into contact with the water-soluble container in the container, it does not become polluted or float in the container as oil droplets.

Therefore, by providing a container provided with a dispenser device in which the lubricant is applied to the sliding portion, it is possible to meet a conventional demand.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing a cross section of a dispenser device to which a lubricant of the present invention is applied.

[Explanation of symbols]

 1 Container 2 Dispenser device (pump type) 3 Button 5 Nozzle (Discharge port) 6, 7 Plunger (Sliding agent) J Lubricant

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) C10N 40:02

Claims (6)

[Claims] An object which is designed to discharge an object contained in a container by applying a discharge pressure to the object by sliding a sliding member receiving an external force from the container. A lubricant applied to the sliding member of the dispenser device, wherein the first element comprises at least one selected from polydimethylsiloxane and polyphenylmethylsiloxane, and at least one selected from polyethylene oxide and polypropylene oxide. A lubricant for a sliding portion comprising a second element composed of one. 2. The sliding part lubricant according to claim 1, wherein the first element accounts for 10 to 70% by weight and the second element accounts for 30 to 90% by weight. 3. The viscosity of the lubricant for the sliding portion is 300 to 2000.
3. The lubricant for a sliding portion according to claim 1, wherein the lubricant is mPa.S. 4. The lubricant for a sliding part according to claim 1, wherein the contents are a medicine or a cosmetic. 5. A dispenser with a discharge function, which is designed to store an article therein and apply an ejection pressure to the article when the sliding member is subjected to an external force to slide the article to eject the article. A container provided with a device, wherein the sliding member comprises: a first element comprising at least one selected from polydimethylsiloxane and polyphenylmethylsiloxane; and at least one selected from polyethylene oxide and polypropylene oxide. A container to which a lubricant constituted by the second element is applied. 6. The container according to claim 5, wherein the container is a medicine or cosmetic.