JPS5857301B2 - Method for manufacturing pearlescent buttons - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a button having pearlescent luster.

More specifically, the present invention relates to a method for producing pearlescent buttons using a resin composition containing as main components an unsaturated polyester resin, a pearlescent pigment, a curing catalyst, an aluminum alkoxide and/or its derivative, and an alcoholic hydroxyl group-containing compound. It is something.

Currently, many types of resins are used as synthetic resins for buttons, but unsaturated polyester resins are especially easy to work with.
It has excellent physical properties such as heat resistance and chemical resistance, and is widely used.

Among such synthetic resin buttons, pearlescent buttons are particularly preferred because of their beautiful appearance.

Buttons with pearlescent luster are generally manufactured by blending pearlescent pigments into the raw resin composition, but in order to obtain good pearlescent luster, it is preferable to orient the pearlescent pigments. Therefore, when producing a pearlescent button using a thermosetting resin such as an unsaturated polyester resin, it is effective to use a method that allows curing under stress.

Therefore, centrifugal molding or press molding is currently used to obtain pearlescent buttons using unsaturated polyester resins having excellent properties as described above.

However, in the case of centrifugal molding, although the orientation of pearlescent pigments in the resulting cured product is good and buttons with excellent pearlescent luster can be obtained, (1) after punching from a sheet-like semi-cured product, , There are many steps to complete curing and then cutting into a chain shape, and the yield of the material is generally low at 50φ or less. (2) The hardenability of the surface in contact with air is poor, and the appearance after hardening is poor, etc. It has the following disadvantages.

On the other hand, the press molding method (1) hardens and molds in a chain-like or button-shaped mold, so the material yield is generally over 80%, which is extremely high; (2) the material is sealed and sealed from air; It has advantages such as: (3) because it is cured in a mold, all surfaces are finished with an extremely good appearance, and (3) because it is cured under heating, productivity is extremely high.

However, in the press molding method, it is necessary to thicken the unsaturated polyester resin composition of the material to an appropriate viscosity of 1 in advance.

As a method for increasing the viscosity of an unsaturated polyester resin composition as a material, for example, a method of increasing the viscosity by applying a curing catalyst to bring it into a semi-cured state has been carried out.

However, this method requires a strict control system to adjust the viscosity to an appropriate usable viscosity range because the thickening process is based on a curing reaction. The curing reaction progresses due to the heat accumulated inside the resin composition, making it unusable. (2) Even while the resin composition is stored in a usable viscosity range, the curing reaction continues to increase its viscosity. However, it becomes unusable in a relatively short period of time, resulting in a poor material yield. This poses problems such as restrictions.

Another method for thickening an unsaturated polyester resin is to incorporate a metal alkoxide and/or a derivative thereof.

However, with this method, it is difficult to adjust the viscosity because the rate of thickening and the viscosity reached are easily affected by the amount of water in the resin and the humidity in the workplace. Another problem is that the viscosity continues to rise, so the period of time it takes to reach a usable viscosity range is short.

In view of the current situation, the present inventors conducted extensive research and found that an unsaturated polyester resin recombinant containing a pearlescent pigment, which uses aluminum alkoxide and/or its derivative in combination with an alcoholic hydroxyl group-containing compound, By thickening this resin composition, sandwiching it between films, and press-molding it using a mold, a button with good pearl luster and an excellent appearance can be produced. The present invention was achieved by discovering that it can be manufactured with good productivity.

Therefore, an object of the present invention is to provide a resin composition and a press molding method suitable for producing buttons with good pearlescent luster and excellent appearance by press molding.

Another object is to provide certain unsaturated polyester resins which are particularly suitable for the production of buttons with good pearlescent luster and excellent appearance.

Further objects will become apparent from the description below.

That is, the present invention provides an unsaturated polyester resin A, a pearlescent pigment B, a curing catalyst C, an aluminum alkoxide and/or a derivative thereof, and an alcoholic hydroxyl group-containing compound E.
The main components are aluminum alkoxide and/or its derivative and alcoholic hydroxyl group-containing compound E, and the latter is 50 to 200 parts by weight per 100 parts by weight of the former.
After thickening the resin composition (2) at room temperature or by heating if necessary to obtain a thickening composition (2) having a viscosity of 200 to 2000 poise at 25°C, the resin composition (2) having a ratio within the range of parts by weight is prepared. The present invention relates to a method for producing a button having pearlescent luster, which is characterized in that the sandwiched state is press-molded using a mold under heat and pressure.

The unsaturated polyester resin A used in the present invention is composed of an unsaturated polyester and a polymerizable monomer.

Unsaturated polyester can be prepared by a conventional method, for example, by combining an acid component containing an unsaturated dibasic acid and an alcohol component mainly consisting of alkylene glycol, with a molar ratio of carboxyl groups in the former to hydroxyl groups in the latter from 0.7 to 1.4. The molecular weight can be adjusted by a method of reacting at a temperature in the range of 130 to 250 °C under an inert gas atmosphere at a ratio such that the molecular weight is in the range of 400 to 2000.
It is in the range of 0.

Of course, it can be prepared by the so-called oxide method in which part or all of the alcohol component is replaced with an alkylene oxide having 2 to 3 carbon atoms and an acid anhydride is used for part or all of the acid component.

Examples of unsaturated dibasic acids include maleic anhydride, maleic acid, and fumaric acid.

Further, examples of acids that can be used other than unsaturated dibasic acids include phthalic anhydride, isophthalic acid, terephthalic acid, succinic acid, and adipic acid.

It is desirable to use the unsaturated dibasic acid in the acid component in an amount of 10 to 100 moles.

Examples of alcohol components include ethylene glycol,
Diethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, hexylene glycol, neopetyl glycol, hydrogenated bisphenol A, and the like can be mentioned.

Among such unsaturated polyesters, in the present invention, polyesters with an acid value in the range of 10 to 40 and a hydroxyl value in the range of 10 to 40 are used.
50, and the ratio of hydroxyl value/acid value is 1.0 to 3.
．． Particularly preferred are unsaturated polyesters a in the range 0.

As the polymerizable monomer, compounds commonly used in the unsaturated polyester resin industry can be used,
Examples include styrene, methyl methacrylate, α-methylstyrene, diallyl phthalate, etc. Among these, styrene is particularly preferred in the present invention.

To obtain the unsaturated polyester resin A from the unsaturated polyester and the polymerizable monomer, the ratio is in the range of 20 to 150 parts by weight to 100 parts by weight of the former, by means commonly used in the art. You can mix it with.

At this time, it is preferable to add a polymerization stabilizer, and examples of such polymerization stabilizers include hydroquinone, benzoquinone, and t-butylcatechol.

As pearlescent pigment B, lead phosphate ξ having a plate-like form is used.
Examples include inorganic pigments such as carbon chains, natural fish scale foil, etc., and can be used in an amount of 0.1 to 5 parts by weight based on 100 parts by weight of the unsaturated polyester resin A.

As the curing catalyst C, for example, benzoyl peroxide,
Cyclohexanone peroxide, methyl ethyl ketone peroxide, lauroyl peroxide, cumene hydroperoxide, t-butyl hydroperoxide, di-
A curing catalyst commonly used in the industry, such as t-butyl peroxide, azobisinbutyronitrile, and azobisisovaleronitrile, is added in an amount of 0.1 to 5.0 parts by weight per 100 parts by weight of the unsaturated polyester resin A. Can be used in a range of proportions.

Aluminum alkoxide and/or its derivative D (hereinafter referred to as aluminum compound).

), examples of aluminum alkoxide include triisopropoxyal□nium, tributoxyal□
Aluminum, monobutoxydiisopropoxyaluminum, etc. can be used.

Examples of derivatives include chelate compounds of aluminum alkoxide and acetoacetate or malonic acid ester as described above.

Examples include ethyl acetoacetate aluminum diisopropoxide, diethyl malonate aluminum diisopropoxide, and the like.

In the present invention, as the aluminum compound, one or more selected from the group consisting of the above-mentioned aluminum alkoxides and derivatives thereof can be used.

Alcoholic hydroxyl group-containing compound E (hereinafter referred to as alcohol compound E).

), various compounds having an alcoholic hydroxyl group in the molecule can be used.

Among these compounds, those having 1 to 1 carbon atoms, such as methyl alcohol, ethyl alcohol, flobyl alcohol, etc.
0 aliphatic-hydric alcohols; aliphatic dihydric alcohols having 2 to 10 carbon atoms such as ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, butylene glycol, etc.; and glycerin, trimethylolpropane. Compounds selected from the group consisting of aliphatic trihydric alcohols having 3 to 10 carbon atoms are particularly effective in the present invention.

The alcohol compound E is used in a ratio of 50 to 200 parts by weight based on 100 parts by weight of the aluminum compound D.

If the amount is less than 50 parts by weight, the effect of using alcohol compound E will be insufficient, which is not preferable.

On the other hand, if the amount exceeds 200 parts by weight, it is not only uneconomical because no effect commensurate with the large amount added, but also a large amount of free alcohol exists in the resin, which deteriorates the physical properties of the cured product. This is still undesirable as it has a negative impact on

The amounts of the aluminum compound and the alcohol compound E are such that the total amount is within the range of 0.5 to 5.0 parts by weight based on 100 parts by weight of the unsaturated polyester resin A.

A small amount of less than 0.5 parts by weight is not sufficient for the effect, and
Even if the amount is more than 5.0 parts by weight, an effect commensurate with the added amount cannot be expected, and both are not desirable.

To prepare resin composition (2) from unsaturated polyester resin A, pearlescent pigment B, curing catalyst C, aluminum compound and alcohol compound E, these components may be directly mixed, or these components may be mixed directly. Some of them may be premixed and then mixed with the remaining ingredients.

For example, the other components may be added to the unsaturated polyester resin A, or the aluminum compound and the alcohol compound E may be mixed in advance, peeled, and mixed with the other components.

In addition, the aluminum compound and alcohol compound E are
Each of these 11 may be used, or may be used after being dissolved in a solvent such as styrene or xylene.

However, the present invention is not limited by the mixing order or mixing method of each component.

Coloring pigments commonly used in the unsaturated polyester resin industry can be added to the resin composition (1) of the present invention, if necessary.

According to the present invention, the thus obtained resin composition (2) is thickened to a viscosity of 200 to 2000 poise at 25°C to obtain a thickened composition (2). However, for this purpose, the viscosity may be increased by aging at room temperature, or the viscosity may be increased by heating to a temperature at which the curing catalyst used does not substantially start its action.

If the viscosity of the thickened composition (2) obtained in this manner is lower than 200 poise, the fluidity is too good, and if it exceeds 2000 poise, the fluidity is poor, and in either case, the appearance is not good. I don't like it because I can't get the button.

After such a thickening process, the resin composition of the present invention ■
The thickening properties of this resin are not affected by the amount of water in the resin or the humidity in the workplace, and it exhibits excellent thickening properties, with remarkable initial thickening and little change over time after thickening. .

Such excellent thickening properties can be obtained by using the aluminum compound and the alcohol compound E in combination.

This is revolutionary compared to the case where a metal alkoxide compound or its derivative compound is used alone, and this is one of the features of the present invention.

In the present invention, the resin composition is thickened to a viscosity of 1 to give a viscosity within the range of 200 to 2000 poise at 25°C to form a thickened composition (2), which is then sandwiched between two films (3). The buttons are manufactured by press molding using a mold under heat and pressure.

As the film (2), a synthetic resin film having extensibility and relatively excellent heat resistance can be used.

Among these films, polyvinyl alcohol,
Films made of vinylon or polyvinyl chloride are particularly suitable.

In order to press-mold the thickening composition ■ using a mold while sandwiching the thickening composition ■ between such films ■, for example, measure the necessary amount of the thickening composition ■ between two films ■ or fold it in half. After being sandwiched between one sheet of film ■, it may be placed between the upper mold and the lower mold of the mold and press-molded. Place the measured thickening composition ■ on top, and place another film ■ on top.
Press molding may be performed after covering with.

In the present invention, it is an essential requirement to press-form the thickening composition (■) with the film (2) sandwiched between them. The scope of the invention is not limited.

By using the film (2) as described above during press molding, (1) the sealing performance of the mold is improved, (2) the mold releasability of the molded cured product is improved, and its removal becomes easy.
3) Effects such as easier cleaning of the mold and improved workability can be obtained.

Furthermore, buttons obtained according to the method of the present invention can be obtained in the same manner as in the present invention except that alcohol compound E and/or film ① are not used, or buttons obtained by semi-staining with a curing catalyst as conventionally carried out. It has an elegant pearlescent luster with a far more varied and beautiful pattern than buttons produced by increasing the viscosity by setting it in a hardened state.

This is an unexpected effect obtained for the first time by the method of the present invention, and is a major feature of the present invention along with excellent thickening properties.

The reason for this is not clear, but (1) the thickening composition ■ obtained by thickening the resin composition ■ based on the present invention was thickened only with the aluminum compound without using the alcohol compound E. Unique viscosity behavior compared to resin compositions (one of the reasons is that there is little change in viscosity over time).

); (2) When press molding is performed using the film ■, the thickening composition ■ does not come into direct contact with the mold, so the thickening composition inside the mold is lower than when the film ■ is not used. This is presumed to be due to the fact that material (2) tends to exhibit peculiar flow behavior, etc., and other factors are intertwined with each other.

The mold used in the present invention is a mating mold consisting of two or three or more molds, and those commonly used in the industry can be used.

The temperature of the mold varies depending on the type of curing catalyst C used, and is generally in the range of 50 to 150°C.

Moreover, the pressure can be appropriately selected within the range of 0.5 to 50%.

However, the present invention is not limited by these mold temperatures and pressures.

The button manufacturing method of the present invention improves the thickening properties of the resulting resin composition (2) by using an aluminum compound and an alcohol compound E together as components of the material composition,
Furthermore, the hardened button has a wonderful pearlescent luster,
Furthermore, by sandwiching the thickening composition (1) between the films (2) during press molding, the appearance of the resulting button is improved.

Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples.

In the examples, "part" means part by weight, and "excellent" means weight φ.

Of course, the present invention is not limited to these examples.

Example 1 Into a fourth flask equipped with a thermometer, a partial condenser, a total condenser, an inert gas inlet tube, and a stirrer, 711 parts of phthalic anhydride and 1068 parts of maleic anhydride were added.
and 1,310 parts of propylene glycol were charged and subjected to a dehydration condensation reaction in an inert gas atmosphere at a temperature of 200 to 250°C to obtain an acid value of 22 and a hydroxyl value of 32 (hydroxyl value/acid value -1,45). An unsaturated polyester was obtained.

30 parts of styrene and 0.01 part of hydroquinone were added to 70 parts of this unsaturated polyester and dissolved in each other to form an unsaturated polyester resin (hereinafter referred to as resin (1)).

). 1 part of pearlescent pigment, 1 part of benzoyl peroxide, and 1.0 part of methyl alcohol as alcohol compound E were added and mixed to 100 parts of resin (1), and further mixed with alcohol
A resin composition was prepared by adding and mixing 1.0 part of ethyl acetoacetate aluminum diisopropoxide as a nitrogen compound, and the resin composition was allowed to stand at room temperature for 20 hours to increase the viscosity, thereby obtaining a thickened composition (1).

When the viscosity was measured at 25°C, it was 250 poise (
Using a viscometer with type B helipath, the same applies hereafter.

)Met. This thickening composition (1) was sandwiched between two polyvinyl alcohol films, and the diameter was 1101rt.
A mold (manufactured by Kanase Kogyo Co., Ltd.) having a hook shape with a depth of 3 wn (hereinafter referred to as button molding mold (1)).

) at a temperature of 100°C, a pressure of 2 hours, and a heating and pressurizing time of 3 hours.
Press molding was carried out under conditions of 10 minutes to obtain a button.

The obtained button had an elegant pearlescent luster and an excellent glossy appearance.

Example 2 Acid value 25, hydroxyl value 26 (hydroxyl value/acid value -1,0
4) Unsaturated polyester was obtained.

70 parts of this unsaturated polyester, 30 parts of styrene, and 0.005 parts of hydroquinone are mixed and mutually dissolved to form an unsaturated polyester resin (hereinafter referred to as resin (2)).

). 100 parts of resin (2), 1.2 parts of pearlescent pigment, 1.0 part of benzoyl peroxide, 2.0 parts of propylene glycol as alcohol compound E, and 50 polystyrene solution of ethylacetoacetate aluminum diisopropoxide as aluminum compound. 3.0 parts of each were added and mixed to form a resin composition, which was left to stand at room temperature for 15 hours to thicken to obtain a thickened composition (2).

The viscosity of the thickening composition (2) at 25°C was 1000 poise.

This thickening composition (2) was sandwiched between two polyvinyl chloride films, and using the button molding mold 1 used in Example 1, the temperature was 105°C, the pressure was 20 degrees, and the heating and pressing time was 2. A button was obtained by press molding for 5 minutes.

The obtained button had a beautiful pearlescent luster and an excellent glossy appearance.

Example 3 After reacting 66 parts of isophthalic acid and 88 parts of propylene glycol at an acid value of 51, maleic anhydride was reacted with 59 parts of propylene glycol.
A further reaction was carried out by adding 50% of the unsaturated polyester to obtain an unsaturated polyester having an acid value of 27 and a hydroxyl value of 45 (hydroxyl value/acid value = 1.67).

70 parts of this unsaturated polyester, 30 parts of styrene, and 0.01 part of hydroquinone were mutually dissolved to form an unsaturated polyester resin (hereinafter referred to as resin (3)).

). Resin (3) 100 parts, pearlescent pigment 1.2
After mixing 0.2 parts of glycerin as Hyalcohol Compound E, 1.0 parts of t-butyl peroxybenzoate, and 1.0 parts of aluminum triisopropoxide as an aluminum compound were added and mixed to obtain a resin composition. .

This resin composition was left at room temperature for 30 hours to form a thickening composition (3
).

The viscosity of the thickening composition (3) at 25° C. was 1500 poise.

The thickening composition (3) was sandwiched between two folded polyvinyl alcohol films, and a hook-shaped mold (manufactured by Kanase Kogyo Co., Ltd.) with a diameter of 10 mm and a depth of 5 holes (hereinafter referred to as button molding mold 2) was placed. to be called.

) at a temperature of 130°C, a pressure of 40, and a heating and pressurizing time of 4.
Press molding was carried out under conditions of 10 minutes to obtain a button.

The obtained button had an excellent appearance with an elegant pearlescent luster and a beautiful luster.

Comparative Example 1 Using the resin (1) obtained in Example 1, alcohol compound E
A resin composition was obtained in the same manner as in Example 1 except that
Comparative thickening composition (1) left at room temperature for 20 hours to thicken
And so.

The viscosity of comparative thickening composition (1) at 25°C is 1000
It was Poise.

Using this comparative thickening composition (1), press molding was performed under the same conditions as in Example 1 to obtain a button.

The pearlescent luster of the obtained buttons was inferior to those obtained in Examples 1 to 3.

Comparative Example 2 The resin (1) obtained in Example 1 was heated to 50°C, and while stirring, 1.2 parts of pearlescent pigment and 1.3 parts of benzoyl peroxide were added, and an aluminum compound and alcohol compound E were added. Without addition, stirring was continued for 30 hours to increase the viscosity, and a comparative thickened composition (2) was obtained.

The viscosity at 25°C was 1500 poise.

This comparative thickening composition (2) was press-molded using Button Molding Mold 1 under the same conditions as in Example 3 to obtain a button.

This button was inferior to the buttons obtained in Examples 1 to 3 both in pearl luster and appearance.

Comparative Example 3 Using the thickening composition (1) obtained in Example 1, press molding was performed under the same conditions as in Example 1 except that no film was used to obtain a button.

This button had a simple pearlescent pattern with little variation, and the luster was somewhat strong.

Example 4 To 100 parts of the resin (2) obtained in Example 2, 1.0 parts of pearlescent pigment was added.
2 parts of pensoyl peroxide, 2.0 parts of propylene glycol as alcohol compound E, and 2.5 parts of a 50-width styrene solution of ethyl acetoacetate aluminum diisopropoxide as aluminum compound were added and mixed to prepare a resin. It was made into a composition.

This resin composition was left to stand in a thermostatic chamber at 40 to 50°C for 5 hours to thicken it, to obtain a thickened composition (4).

The viscosity of thickening composition 0) at 25°C was 500 poise.

A polyvinyl chloride film was spread on the mold surface of the lower mold of the button mold 1 used in Example 1, a measured amount of the thickening composition (4) was placed on top of it, and another polyvinyl chloride film was placed on top of it. It was covered with a vinyl chloride film and press-molded at a temperature of 105° C., a pressure of 30 degrees, and a heating and pressing time of 3 minutes to obtain a button.

The obtained button had an excellent appearance with an elegant pearlescent luster and a beautiful luster.

Example 5 An unsaturated polyester having an acid value of 50 and a hydroxyl value of 60 was obtained in the same manner as in Example 1 using 711 parts of phthalic anhydride, 1068 parts of maleic anhydride, and 1350 parts of propylene glycol.

70 parts of this unsaturated polyester, 30 parts of styrene, and 0.005 parts of hydroquinone are mixed and mutually dissolved to form an unsaturated polyester resin (hereinafter referred to as resin (5)).

). Resin (5) 100 parts to 1.2 parts of pearlescent pigment
1.5 parts of benzoyl peroxide, 2.0 parts of propylene glycol as the alcohol compound E, and 1.5 parts of ethyl acetoacetate aluminum diisopropoxide as the aluminum compound were added and mixed to form a resin composition. The mixture was allowed to stand at room temperature for an hour to thicken it to obtain a thickened composition (5).

This thickening composition (5) o has a viscosity of 400 at 25°C.
It was poise.

A polyvinyl alcohol film was spread on the mold surface of the lower mold of button mold 2, and the thickening composition (5) was weighed on top of it.
This was further covered with a polyvinyl alcohol film, and press-molded at a temperature of 100° C., a pressure of 10%, and a heating and pressing time of 3 minutes to obtain a button.

Although the obtained buttons were slightly stronger than the buttons obtained in Examples 1 to 4, they had superior luster and beautiful pearlescent luster compared to those obtained by conventional methods.

Example 6 740 parts of phthalic anhydride, 490 parts of maleic anhydride, 340 parts of ethylene glycol, and 37 parts of propylene glycol
Using 0 parts, the acid value was 31.0 parts in the same manner as in Example 1. hydroxyl value 1
An unsaturated polyester having a value of 9 (hydroxyl value/acid value = 0.61) was obtained.

65 parts of this unsaturated polyester, 35 parts of styrene, and 0.01 part of hydroquinone are mixed and mutually dissolved to form an unsaturated polyester resin (hereinafter referred to as resin (5)).

). To 100 parts of resin (6) were added 1 part of pearlescent pigment, 1.5 parts of benzoyl peroxide, 1.5 parts of ethylene glycol as alcohol compound E, and 1.5 parts of ethylacetoacetate al□nium diisopropoxide as aluminum compound. After each was added and mixed to form a resin composition, the resin composition was left to stand at room temperature for 20 hours to thicken to obtain a thickened composition (6).

The viscosity at 25°C was 750 poise.

A button was obtained by press molding in the same manner as in Example 4, except that the thickening composition (9) was used.

Like the button obtained in Example 5, the obtained button had excellent luster and beautiful pearlescent luster.

The results obtained in the above Examples and Comparative Examples are compared using a 5-point system as shown in the table below (Table 1).

Note that the results of the 5-point system are the average of the visual evaluations of 5 examiners.

In addition, thickening compositions (1) to (5) and comparative thickening compositions (1) to 1 obtained in Examples 1 to 6 and Comparative Examples 1 to 2, respectively
After storing (2) in the dark at room temperature (15-23°C) for 7 days, it was press-molded in the same manner as in Example 2 to obtain a button.

Table 2 shows the results of the five-point evaluation of these buttons in the same manner as above.

Claims (1)

[Scope of Claims] 1 An unsaturated polyester resin A1 mainly consisting of a pearlescent pigment B, a curing catalyst C, an aluminum alkoxide and/or a derivative thereof, and an alcoholic hydroxyl group-containing compound E, among which an aluminum alkoxide and/or a derivative thereof What is the alcoholic hydroxyl group-containing compound E? Resin composition I in which the ratio of the latter is in the range of 50 to 200 parts by weight to 100 parts by weight of the former is heated at room temperature or if necessary to thicken it at 25°C. The viscosity applied is 200~2
1. A method for producing a button with pearlescent luster, which comprises forming a thickening composition (1) of 000 poise, and then press-molding the mixture between films (2) using a mold under heat and pressure. 2 The total amount of aluminum alkoxide and/or its derivative and alcoholic hydroxyl group-containing compound E is:
0.5 per 100 parts by weight of unsaturated polyester resin A
The method for producing a button with pearlescent luster according to claim 1, wherein the ratio is within the range of 5.0 parts by weight. 3 Alcoholic hydroxyl group-containing compound E has 1 to 1 carbon atoms
Claim 1, which is a compound selected from the group consisting of 0 aliphatic-hydric alcohols, aliphatic dihydric alcohols having 2 to 10 carbon atoms, and aliphatic trihydric alcohols having 3 to 10 carbon atoms. A method for producing a button with pearlescent luster. 4. The unsaturated polyester resin A has an acid value within the range of 10 to 40, a hydroxyl value within the range of 10 to 50, and a hydroxyl value/acid value within the range of 1.0 to 3.0. 2. The method for producing a pearlescent button according to claim 1, wherein the button is made of an unsaturated polyester a and a polymerizable monomer. 5. The method for producing a button with pearlescent luster according to claim 4, wherein the polymerizable monomer is styrene. 6 Film ■ is a polyvinyl alcohol film,
Claim 1 is a film selected from the group consisting of a vinylon film and a polyvinyl chloride film.
A method for manufacturing a button having pearlescent luster as described in 2.