JPH0563183B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to spray compositions containing microcapsules. [Prior art and problems] A spray composition containing microcapsules containing a fragrance can be sprayed onto the packaging or label of a product, for example, so that the purchaser of the product can destroy the microcapsules and smell the fragrance when desired. There is a strong desire for its development in order to stimulate consumers' desire to purchase. Products and products similar to spray compositions containing such microcapsules have not yet been commercialized due to the lack of microcapsule technology for fragrances and the unexplored development of good dispersants in water and alcohol systems. Even the rarely developed products have been unable to overcome many problems, such as poor dispersion of the spray composition, clogging of the spray nozzle, poor stability over time, and failure to form a spray pattern. The purpose of the present invention is to encapsulate a fragrance in microcapsules and devised a way to obtain a fragrance by destroying the microcapsules anytime, anywhere, and without the time constraints of conventional fragrance scattering. First, it is to provide a completely new spray composition that can be expected to have a wide range of uses. [Means and effects for solving the problems] The present invention provides a spray composition comprising synthetic resin microcapsules containing a fragrance and a hydrophobic liquid therein, a dispersant, an adhesive, alcohol, and a propellant gas. It is. This will be explained in detail below. In the present invention, the fragrance is one that emits a fragrance by itself and does not harm the human body, and further dissolves or disperses in the oily substance used in the invention, and any of them can be considered as the fragrance of the invention. obtain. It is said that the average person can smell several thousand different odors, and those with experience can distinguish over 10,000 different odors. The variety of fragrances is also huge. Fragrances can be broadly classified into natural fragrances and synthetic fragrances (single fragrances). Furthermore, natural fragrances are divided into vegetable fragrances and animal fragrances, each of which is called an isolated fragrance. By blending these isolated fragrances and synthetic fragrances, common mixed fragrances are completed. Among these mixed fragrances, those that are unstable to heat and those that are soluble in water are excluded from the fragrances in the present invention.
The fragrance used in the present invention is lemon as a fruit fragrance,
There are roses, strawberries, diasmine, almonds, violets, oranges, apples, bananas, grapes, melons, florans, blueberries, etc., and leafy greens include eucalyptus, Japanese tea, coffee, honeysuckle, and so on. In the present invention, the hydrophobic liquid is a hydrophobic liquid that dissolves or disperses perfume well, does not affect the film forming properties of the film agent in the in-situ polymerization method, is immiscible with water, and is not miscible with water at room temperature. This includes anything that is liquid and non-toxic. The general formula for such a hydrophobic liquid is Phthalate esters represented by R and R' have substituents of methyl, ethyl, butyl, 2-ethylhexyl, heptyl, octyl, benzoate esters with alcohol residues of methyl, ethyl,
alkyl of propyl, butyl, isopentyl, benzyl, aliphatic monobasic acid esters, such as caproate, caprylate, caprate, laurate, myristate, palmitate, stearate Substituted products, and alkyl substituted products of aliphatic dibasic acids such as oxalic acid esters, succinic acid esters, adipic acid esters, corkic acid esters, and sebastic acid esters, such as these aliphatic monobasic acid esters and aliphatic dibasic acids. C ₁ to C ₆ alkyl substituents of the esters are useful. Moreover, those having these saturated and unsaturated structures are also included in the hydrophobic liquid of the present invention. Furthermore, ethyl cinnamate, dioctyl adipate, and diethyl malonate are also included in the hydrophobic liquid of the present invention. The microcapsules in the present invention are preferably manufactured using synthetic resin as a membrane agent,
It is a synthetic resin film produced by the so-called interfacial polymerization method or in-situ polymerization method, and includes microcapsules obtained by coating a hydrophobic substance. Specifically, polyamide membrane microcapsules, polyester membrane microcapsules, polyurea membrane microcapsules, epoxy membrane microcapsules, polyureaamide membrane microcapsules, etc. produced by interfacial polymerization, or urea formaldehyde resin membrane microcapsules, melamine formaldehyde produced by in situ polymerization. Examples include resin membrane microcapsules and melamine urea formaldehyde resin membrane microcapsules. Of course, interfacial polymerization method or InSitu
It is also possible to use microcapsules whose film agent is a composite synthetic resin or double synthetic resin film obtained by combining a polymerization method and other chemical methods. In the present invention, those obtained by in-situ polymerization are preferred, and aminoaldehyde resin microcapsules obtained by in-situ polymerization are especially preferred. This is due to 1) work stability in the production of microcapsule slurry, 2) ability to obtain microcapsule slurry with relatively high solids content and excellent productivity per unit volume, 3) denseness of the microcapsule membrane, and 4) long-term storage stability; 5) membrane agent cost is low and can be easily obtained industrially;
Due to reasons such as. What is aminoaldehyde resin film agent? A urea formaldehyde resin represented by M ₁ to M ₄ has one or more methylol groups, and if necessary, M ₁ to M ₄
One or more methylol groups are condensed to form a methylene bond or an ether bond. Also, amination of one or more of M ₁ to M ₄ ,
Also includes sulfonated ones. Melamine formaldehyde resins are also useful as aminoaldehyde resins for use in the present invention. In the case of melamine formaldehyde resin, as with urea formaldehyde, it is preferable that the resin has 1 to 6 methylol groups per mole of melamine. One or more of the 1 to 6 methylol groups can be methoxylated, and these may be condensed to form a methylene bond or an ether bond. Furthermore, melamine and methylolated products of melamine that are chlorinated, aminated, or sulfonated are also included in the aminoaldehyde resin of the present invention. It goes without saying that the aminoaldehyde resin of the present invention also includes one or a combination of one or more of these urea formaldehyde resins, melamine formaldehyde resins, and melamine-urea formaldehyde resins. By using these aminoaldehyde resins as a membrane agent, compatibility with alcohol-based propellant gas has been achieved, which was impossible with microcapsules obtained by the coacervation method (phase separation method) using conventional gelatin. The characteristics are improved. The dispersant used in the present invention forms a good dispersion system in a water and alcohol system so that microcapsules dispersed in water are stable in an alcohol system,
Furthermore, it must also have good compatibility with propellant gas. Further, when water is removed from microcapsules dispersed in water and dry-up is performed, it is necessary to disperse only in alcohol, so an alcohol-soluble dispersant is preferable.
For this reason, it is important that the dispersant used in the present invention is soluble in amphoteric systems such as water and alcohol. The dispersant is preferably a synthetic resin oligomer or polymer. The dispersant used in the present invention includes styrene.
Maleisic acid copolymers and modified products and salts thereof, styrene oligomers and styrene polymers and modified products and salts thereof, alkyl diphenyl ether disulfonates, higher alcohol sulfate salts, sodium alkylbenzene sulfonates, alkyl phenyl ether sulfate salts, Examples include sodium salt of β-naphthalene sulfonic acid formalin condensate, dimethylbenzylammonium chloride, unsaturated amidophenyl-substituted alkanesulfonic acid, and 2-acrylamido-2-phenylpropanesulfonic acid. Further, one type or a combination of two or more of these can also be used as the dispersant of the present invention. The adhesive used in the present invention is a dispersion system of water and alcohol that does not lose its adhesive ability for a long period of time, and the microcapsules do not peel off from the object to be sprayed after the water and alcohol scatter. good. Acrylic emulsion is preferably used as the adhesive used in the present invention. Further, a solvent-based adhesive is preferably used for the microcapsules after dry-up. Although various water- and alcohol-soluble adhesives are commercially available and are well-known, examples of adhesives preferably used in the present invention include alcohol- and alkali-soluble acrylic emulsions. Also, epoxy adhesives may be used. The alcohol used in the present invention may be any alcohol, but preferably C ₁ to C ₉ alkyl alcohols, and more preferably ethanol.
It is particularly important for the spray composition of the present invention to be able to sense odors, and it is used for humans and objects that are closely related to humans, and ethanol is preferred in terms of its action. The propellant gas used in the present invention may be any general propellant gas conventionally used in water-based or solvent-based systems. For example, dimethyl ether gas is often used as the ether gas, methane gas, ethane gas, propane gas, or butane gas is often used as the methane gas, and chlorofluorocarbon gas or carbon dioxide gas is often used as the other gas. Further, one type of propellant gas or a mixed gas of one or more types of these propellant gases are also often used. Propellant gas used in the present invention Although any of these gases can be used, in particular one or two of dimethyl ether gas, propane gas, butane gas, and carbon dioxide gas is used in view of compatibility with the microcapsule dispersion system and compatibility with the human body. It is preferable to use a mixture of more than one type of gas. This will be explained below using examples. Comparative Example 1 A hydrophobic liquid in which 4 g of rose fragrance essence was dissolved in 40 g of methyl myristate was dispersed in water, and then 40% urea formaldehyde resin (Mitsui Toatsu Chemical
Add 6g of Euramin P-1500 (manufactured by KK) and use the known
Polymerized by in situ polymerization method, concentration 50% average particle size
100g of 3μ water-dispersed microcapsules were obtained. This is designated as sample [I]. Next, put 19g of sample [I] into a glass spray can.
It was weighed, filled with 19 g of water and 8 g of dimethyl ether gas, and left at room temperature for one month. This will be referred to as sample [A]. Comparative Example 2 19g of sample [I] was weighed into a glass spray can, then filled with 19g of ethanol and 8g of dimethyl ether gas, and left at room temperature for one month. This will be referred to as sample [B]. Comparative Example 3 Sample [I] 15g, water 15g, Pellex SS (dispersant manufactured by Kao Sekiken) diluted to 10% with water 4g, and further 10g
Weighed 4g of Bonlon SB-300 (adhesive manufactured by Mitsui Toatsu Co., Ltd.) diluted to 50% in a glass spray can, mixed well, then filled with 4g of dimethyl ether gas and 4g of butane gas, and left for one month. This will be referred to as sample [C]. Example 1 15g of ethanol instead of water in the recipe of Example 3
was added, and a sample was obtained by the same operation. This will be referred to as sample [D]. Samples A to D of Examples 1 to 4 were left at room temperature for one month, and then observed and evaluated. The results are shown in Table 1.

〔Effect of the invention〕

As is clear from Table 1, according to the method of the present invention, the microcapsules were not destroyed even after being left indoors for one month, and it was found that the microcapsules were able to withstand practical use as a fragrance spray. However, when a mixed system of microcapsules and water or microcapsules and ethanol was filled with propellant gas, some clogging of the spray nozzle was observed after one month of standing. Also, after spraying,
The microcapsules tended to peel off from the object. However, the present invention has discovered that by adding a dispersant and adhesive to this, a good dispersion system can be formed in a water to alcohol system, and it can also be prevented from peeling off from the object to be sprayed, resulting in a good spray pattern. . Therefore, the spray composition containing the microcapsules of the present invention has performance that cannot be obtained with conventional compositions.

Claims (1)

[Scope of Claims] 1. A spray composition containing synthetic resin microcapsules containing a fragrance and a hydrophobic liquid, microcapsules containing a dispersant, an adhesive, alcohol, and a propellant gas. 2. A spray composition containing microcapsules according to claim 1, wherein the synthetic resin microcapsules are aminoaldehyde resin membrane capsules produced by in-situ polymerization.