JP2004242958A - Luminous rubber latex and luminous condom - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminous rubber latex and a luminous condom. <P>SOLUTION: The luminous rubber latex contains Sr<SB>4</SB>Al<SB>14</SB>O<SB>25</SB>:Eu, Dy as a luminous agent and the luminous condom has a luminous layer formed of the luminous rubber latex. The emulsion state of the luminous rubber latex can be stably held even during long-term preservation. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a phosphorescent rubber latex and a phosphorescent condom.
[0002]
[Prior art]
Conventionally, condoms have been used for the purpose of contraception and prevention of sexually transmitted diseases. In particular, in recent years, the HIV virus, which causes severe symptoms to the human body and sometimes kills humans, has also been used. Also, viral infections such as hepatitis C virus are prevalent, and use of condoms is encouraged from the viewpoint of preventing these infections.
When a condom is used, it is necessary to properly wear the condom. However, in a situation where the condom is worn in a dark place, it may be difficult to wear the condom. For this reason, as a condom that emits light in a dark place, a luminous agent (SrAl ₂ O ₄ : Eu) containing strontium aluminate (SrAl ₂ O ₄ ) as a base and rare earth elements europium (Eu) and desprosium (Dy) as activators. , Dy) have been proposed (for example, see Patent Document 1). Further, Patent Document 1 discloses a configuration in which a liquid phosphorescent agent is sprayed, applied to the inner surface of the condom body 1 by a procedure such as screen printing, or kneaded into the material of the condom body. I have.
[0003]
[Patent Document 1] JP-A-10-5264
[Problems to be solved by the invention]
In the production of products such as condoms formed from rubber latex, a vulcanizing agent, a vulcanization accelerator, a vulcanization aid and an antioxidant are first compounded with rubber latex, and the compounded rubber latex is It is usually used as a material for products over several days to several weeks. For this reason, the rubber latex is required to stably maintain the emulsion state during the use period.
However, when the inventors added the luminous agent SrAl ₂ O ₄ : Eu, Dy to the rubber latex and tried to produce a rubber latex product, the viscosity of the rubber latex increased rapidly due to the addition of the luminous agent, and finally, Found that the product was gelled and was not able to withstand the production of the product. JP-A-10-5264 does not disclose or suggest such gelling of rubber latex with the phosphorescent agent SrAl ₂ O ₄ : Eu, Dy.
Therefore, a rubber latex containing a luminous agent, which is stably maintained as an emulsion, has been demanded, and a condom having a luminous layer formed from the luminous agent rubber latex has been desired.
[0005]
The present inventors have found that, when Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy is added to a rubber latex as a luminous agent, an emulsion of the rubber latex is stably maintained. The present invention has been made based on this finding, and it is an object of the present invention to provide a phosphorescent rubber latex that can stably exist.
Another object of the present invention is to provide a phosphorescent condom which is highly safe for a human body and can be easily worn in a dark place.
[0006]
[Means for Solving the Problems]
The present invention provides, as claim 1, a phosphorescent rubber latex containing Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy as a phosphorescent agent.
The present invention provides, as claim 2, a luminous condom having a luminous layer formed of a luminous rubber latex containing Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy as a luminous agent.
According to a third aspect of the present invention, in a condom formed by laminating an inner layer and an outer layer which are not a luminous layer, between the inner layer and the outer layer, Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy is used as a luminous agent. A light-storing condom having a light-storing layer formed from a light-storing rubber latex containing the same.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention is a luminous rubber latex containing Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy as a luminous agent. Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy used as a luminous agent in the present invention is a luminous body using strontium aluminate as a base crystal, europium as an activator, and desprosium as an activator. The phosphor may be a commercially available phosphor such as Luminova (registered trademark) BG manufactured by Nemoto Special Chemical Co., Ltd., or may be manufactured by any known method.
[0008]
The amount of Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy in the phosphorescent rubber latex of the present invention is preferably 10 to 90 parts by weight, more preferably 100 parts by weight of the dry solid content of the base rubber latex. 20 to 80 parts by weight, even more preferably 30 to 70 parts by weight.
In addition, the phosphorescent rubber latex of the present invention may be a phosphorescent agent other than Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy, for example, SrAl ₂ O ₄ : Eu, Dy, as long as the emulsion of the rubber latex is stably maintained. , CaAl ₂ O ₄ : Eu, Nd, etc., but preferably the amount of the luminous agent other than Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy is 100 parts by weight of the dry solid content of the base rubber latex. To 10 parts by weight or less, more preferably 5 parts by weight or less. Even more preferably, the luminous rubber latex of the present invention does not contain any luminous agent other than Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy.
[0009]
The rubber latex serving as the base of the phosphorescent rubber latex of the present invention is not particularly limited as long as it is a rubber latex. For example, natural rubber latex; isoprene rubber, styrene butadiene rubber, nitrile butadiene rubber, chloroprene rubber, polyurethane Latexes of synthetic rubbers such as rubber and silicone rubber; and rubber latexes prevulcanized (in other words, aged) with sulfur, peroxide, radiation, etc .; and polyurethane, SBS (styrene-butadiene-styrene block copolymer) And latexes of thermoplastic elastomers such as SEBS (styrene-ethylene-butadiene-styrene block copolymer), SIS (styrene-isoprene-styrene block copolymer), polyolefin, etc. . Preferably, the rubber latex includes natural rubber latex, isoprene rubber latex, styrene butadiene rubber latex, polyurethane latex and the like.
Further, the luminous rubber latex of the present invention may contain any known additives such as a vulcanizing agent, a vulcanization accelerator, a vulcanization aid, a pigment and an antioxidant.
[0010]
Another embodiment of the present invention is a light-storing condom having a light-storing layer formed of a light-storing rubber latex containing Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy as a light-storing agent. The light-storing layer of the light-storing condom of the present invention is formed of a light-storing rubber latex containing Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy as a light-storing agent, and the light-storing rubber latex is as described above. In the luminous condom of the present invention, the luminous layer can be present in any part of the condom, for example, a mode having a luminous layer over the entire condom, a part of semen pool of the condom, a part of the condom, such as a luminous layer. Embodiments with layers are possible. Further, for example, a mode such as a light-storing layer formed by drawing a pattern on a condom with a light-storing rubber latex by spraying, screen printing, or the like is also possible, but is not limited thereto.
Further, the light-storing condom of the present invention can be in any mode, for example, a mode in which the entire condom shape is formed of a light-storing layer. Further, a mode in which a condom-shaped inner layer that is not a luminous layer is formed and a luminous layer is formed outside the inner layer is also possible. Furthermore, a mode in which an outer layer which is not a luminous layer forming a condom shape is provided and a luminous layer is provided inside the outer layer is also possible. Furthermore, a condom formed by laminating two layers, an inner layer and an outer layer, is also possible in a mode in which a luminous layer is provided between the inner layer and the outer layer. A light-storing condom which is not a layer, and an even more preferable embodiment is a case where the light-storing layer is completely wrapped between the inner layer and the outer layer, from the viewpoint of preventing detachment of the light-storing layer.
[0011]
The non-light-storing layer constituting the light-storing condom of the present invention (for example, the inner layer and the outer layer which are not the light-storing layer in the above embodiment) can be formed using any known material. For example, examples of the material include a rubber latex and an elastomer solution. Examples of the rubber latex include a natural rubber latex; synthetic rubber such as isoprene rubber, styrene butadiene rubber, nitrile butadiene rubber, chloroprene rubber, polyurethane rubber, and silicone rubber. Latexes; and rubber latexes which have been prevulcanized (in other words, aged) with sulfur, peroxide, radiation, etc .; and latexes of thermoplastic elastomers such as polyurethane, SBS, SEBS, SIS, polyolefin, etc. No. Preferably, the rubber latex includes natural rubber latex, isoprene rubber latex, styrene butadiene rubber latex, polyurethane latex and the like. Examples of the elastomer solution include, but are not limited to, an elastomer solution in which a thermoplastic elastomer such as polyurethane, SBS, SEBS, SIS, or polyolefin is dissolved in a solvent.
[0012]
Further, the phosphorescent condom of the present invention can be manufactured by any known method, and the method is not particularly limited. For example, for a condom in which the entire condom shape is formed of a phosphorescent layer, a condom-shaped mold made of glass, aluminum, stainless steel, or the like is dipped in the phosphorescent rubber latex of the present invention, pulled up and dried. It can be formed with. Further, for forming a condom, the condom having an inner layer that is not a luminous layer and having a luminous layer on the outer side thereof, a condom-shaped mold made of glass, aluminum, stainless steel, or the like is applied to a rubber latex or elastomer solution. It can be formed by dipping, lifting and drying, and then dipping in the phosphorescent rubber latex of the present invention, lifting and drying. Furthermore, for a condom having an outer layer that is not a luminous layer forming a condom and having a luminous layer inside, a condom-shaped mold made of glass, aluminum, stainless steel, or the like is immersed in the luminous rubber latex of the present invention. It can be formed by pulling up and drying, then immersing in a rubber latex or elastomer solution, pulling up and drying.
Furthermore, a condom formed by laminating two layers of an inner layer and an outer layer, wherein the condom having a luminous layer between the inner layer and the outer layer is a condom-shaped mold made of glass, aluminum, stainless steel, or the like. Immersed in a rubber latex or elastomer solution, pulled up and dried to form an inner layer, then immersed in the luminous rubber latex of the present invention, pulled up and dried to form a luminous layer on the inner layer, Alternatively, it can be formed by immersing in an elastomer solution, pulling it up, and drying it to form an outer layer on the phosphorescent layer. In this embodiment, by making the immersion depth when forming the luminous layer shallower than the immersion depth when forming the inner layer and the outer layer, it is possible to completely wrap the luminous layer between the inner layer and the outer layer. It becomes possible.
[0013]
The phosphorescent condom formed as described above can be wound up from the opening end side of the condom, and can be wound up to a predetermined point to form a so-called bead portion of the condom. Next, the formed phosphorescent condom is released from the condom-shaped mold, and, if necessary, powder of silica, calcium carbonate, magnesium carbonate, talc, corn starch, etc. A silicone oil, a silicone emulsion, a polyolefin fine particle dispersion, a surfactant, or the like is appropriately used, dried, wound up, and packaged. In addition, in this series of steps, water, an alkaline aqueous solution, and alcohols are used as an extract for the purpose of removing extra vulcanizing agents, vulcanization accelerators, surfactants, etc. present in the formed phosphorescent condom. Extraction processing may be performed.
Hereinafter, the present invention will be described in detail with reference to examples, but the description of the examples does not limit the scope of the present invention.
[0014]
【Example】
Example 1 and Comparative Examples 1 to 3
Evaluation of Stability of Luminescent Rubber Latex Containing Luminescent Agent 1 L of natural rubber latex (dry solid content: 60% by weight) obtained by sulfur vulcanization of natural rubber latex (FELDATEX (registered trademark); manufactured by FELDA) was used. 180 g of the phosphorescent agent was added and stirred to prepare a phosphorescent rubber latex, and the change over time in the state of the phosphorescent rubber latex was visually observed.
The phosphorescent agents used are as follows:
(Example _{1) Sr 4 Al 14 O 25} : Eu, Dy ( Nemoto Co. Ruminoba (R) BGL-300FF);
(Comparative Example _{1) SrAl 2 O 4: Eu} , Dy ( Nemoto Co. Ruminoba (TM) GLL-300FF);
(Comparative Example _{2) CaAl 2 O 4: Eu} , Nd ( Nemoto Co. Ruminoba (registered trademark) V-300M); and (Comparative Example _{3) SrAl 2 O 4: Eu} , Dy ( Nemoto Co. Manufactured by Luminova (registered trademark) G-300FF (PS-1)).
[0015]
In Example 1 using Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy as the luminous agent, the luminous rubber latex did not gel and maintained its emulsion state even 20 days after the addition. On the other hand, in Comparative Example 1 using SrAl ₂ O ₄ : Eu, Dy as the luminous agent, the rubber latex gelled about 1 hour after the addition. Also, Comparative Examples 2 and 3 using CaAl ₂ O ₄ : Eu, Nd or SrAl ₂ O ₄ : Eu, Dy as the luminous agent gelled about 15 hours after the addition.
From this, it became clear that even the same type of luminous agent containing strontium aluminate or calcium aluminate as a host crystal, the stability of the luminous rubber latex when mixed with rubber latex was completely different. .
[0016]
Example 2
Preparation of a phosphorescent condom having a phosphorescent layer formed of a phosphorescent rubber latex containing Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy as a phosphorescent agent. Natural rubber latex (FELDATEX (registered trademark); manufactured by FELDA) sulfur-vulcanized natural To 10 L of rubber latex (dry solid content 60% by weight), 1800 g of Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy (Luminova (registered trademark) BGL-300FF manufactured by Nemoto Special Chemical Co., Ltd.) as a luminous agent was added and mixed. The phosphorescent agent was dispersed in natural rubber latex to prepare a phosphorescent rubber latex. A glass condom-shaped mold was immersed in the natural rubber latex by 25 cm, pulled up, and dried to form an inner layer. Next, the mold on which the inner layer was formed was immersed in the above-mentioned phosphorescent rubber latex for 24 cm, lifted up and dried, to form a phosphorescent layer on the inner layer. Further, the mold having the inner layer and the phosphorescent layer formed thereon was immersed in the natural rubber latex by 25 cm, pulled up, and dried to form the outer layer. Next, a bead was formed, demolded, subjected to an extraction treatment using warm water at 50 ° C., and then dried to form a phosphorescent condom. After exposing the formed phosphorescent condom to the light of a fluorescent lamp for 5 minutes, the afterglow time was visually observed in a dark place. As a result of observation, light emission for 20 minutes was observed.
[0017]
【The invention's effect】
The phosphorescent rubber latex of the present invention has an advantageous effect that the emulsion state of the phosphorescent rubber latex can be stably maintained even when stored for a long time by using Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy as a phosphorescent agent. Having.
In addition, the phosphorescent condom of the present invention has the advantageous effect of being easy to produce because the phosphorescent rubber latex used in the production is highly stable, and also has high safety for the human body and is suitable for use in dark places. There is also an advantageous effect that mounting is easy.

Claims (3)

Sr ₄ Al ₁₄ O ₂₅ : Luminescent rubber latex containing Eu, Dy as a luminous agent. Sr ₄ Al ₁₄ O ₂₅ : A phosphorescent condom having a phosphorescent layer formed from a phosphorescent rubber latex containing Eu, Dy as a phosphorescent agent. In a condom formed by laminating an inner layer and an outer layer which are not a light-storing layer, a condom formed between a light-storing rubber latex containing Sr ₄ Al ₁₄ O ₂₅ : Eu, Dy as a light-storing agent between the inner layer and the outer layer. A phosphorescent condom having a phosphorescent layer.