JP2013010946A - Artificial marble molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an artificial marble resin molded article which does not cause such peeling as in the case of a water-repelling surface coating treatment due to sliding or polishing, even when a daily maintenance using dishcloth or sponge is performed, recovers a water-repelling performance, even when cleaned with a chemical agent, and keeps the water-repelling performance for a long period.SOLUTION: The artificial marble molded article produced by compounding a resin with a water-repelling agent and then molding and curing the composition is characterized in that the water-repelling agent has a water-repelling recovery effect for recovering the water-repelling property, when the surface of the artificial marble is wiped off to lower the expressed water-repelling property.

Description

  The present invention relates to an artificial marble molded body, and in particular, relates to an artificial marble molded body suitable as a member that periodically wipes dirt such as a kitchen or a bathtub.

  A surface coating of a siloxane-based water repellent is known as a technique for making a surface of an artificial marble resin, such as a conventional counter kitchen or bathtub, water repellent and improving the dirt wiping property. (For example, see Patent Document 1)

  In addition, a technique is known in which water repellency can be obtained by adding a resin constituting artificial marble and a water repellent having a binding property to the resin instead of a surface coating into the artificial marble resin. (For example, see Patent Document 2.)

Japanese Patent No. 4375184 JP 2001-294467 A

  However, there is a problem that the water repellency effect is drastically reduced when the dirt adhering to and sticking to the surface of the artificial marble resin is wiped off with a cloth or sponge, or when used in combination with a detergent. It was.

  The present invention has been made in view of the above-mentioned problems. Even when daily care using a cloth or sponge is performed, there is no separation by sliding or polishing like surface coating treatment, and a chemical is used. An object of the present invention is to provide an artificial marble resin molded article that recovers water repellency even after cleaning and maintains the water repellency for a long period of time.

  In order to achieve the above object, the present invention provides an artificial marble molded article obtained by blending a resin having a binding functional group with a filler made of an inorganic material and a water repellent and molding and curing the water repellent. Is an artificial marble molded body characterized by having a water repellency recovery effect of recovering the water repellency when the water repellency developed on the surface of the artificial marble molded body is lowered by wiping the surface.

  According to the present invention, since the internally added water repellent has a water repellency recovery effect, the water repellency temporarily decreases after wiping the surface of the artificial marble molded body, but the water repellency gradually recovers thereafter. Here, the recovery of water repellency means that the value increases with time after the measured water contact angle decreases immediately before cleaning and immediately after cleaning. Therefore, even if wiping is performed during use, the water repellency is recovered thereafter, so that the initial high water repellency effect at the time of molding can be maintained for a long time.

  In the present invention, the water repellent agent is a silicone having functional groups polymerizable with the resin at both ends and having a hydrophobic functional group in the side chain.

  The inventors of the present invention have added water repellency gradually after wiping the surface by adding silicone having a functional group polymerizable with a resin at both ends to an artificial marble molded body and having a hydrophobic functional group in a side chain. The new knowledge that the effect to recover was expressed was acquired. Although the specific reason for the effect is unknown, it is considered as follows. Conventionally, as a method of imparting water repellency to the surface of an artificial marble molded body, a silicone having a functional group at one end is internally added to the artificial marble molded body, so that the binding functional group in the resin and the one end-modified silicone are added. This is achieved by bonding a modifying group and forming a graft copolymer between the resin and silicone in the artificial marble. However, when wiping with a cloth or sponge, the bond between the binding functional group in the resin and the modified group at the terminal of the silicone is broken, and this is repeated, so that the water repellency is lowered and stable. On the other hand, when silicone having functional groups at both ends is internally added to the artificial marble molded body, each of the binding functional groups in the resin and the functional groups at both ends of the silicone is bonded to each other, and the random or block copolymer. Even if a sliding load due to wiping is applied, the bond between the functional group in the resin and the functional group at both ends of the silicone is not broken, and the molecule containing the hydrophobic functional group in the side chain rotates. Conceivable. In the state where the molecule rotates and the hydrophobic functional group is not sufficiently oriented on the surface, the water repellency is temporarily lowered, but the state itself is unstable, and the hydrophobic group is gradually oriented again on the surface. It is presumed that the water repellency is recovered as the surface energy returns to a stable state. This effect provides an artificial marble molded body that maintains the long-term water repellency without damaging the initial water repellency during molding of the artificial marble molded body. Further, since both terminal-modified silicones are bonded not only on the surface of the resin constituting the artificial marble but also in the bulk, even if the artificial marble surface is mechanically polished, the reduction in water repellency can be minimized. Therefore, since surface polishing can be performed to impart designability to a so-called mud design, water repellency can be imparted without impairing the design of the artificial marble.

  In the present invention, the resin is a thermosetting resin obtained by adding a curing agent and molding and curing the resin.

  By adding a curing agent (polymerization initiator) to the thermosetting resin, active species such as radicals, anions, and cations are generated, and such active species contribute to the bond between the resin and silicone. For this reason, silicone can be combined with resin only by adding the hardening | curing agent and catalyst which concern on polymerization similarly to normal thermosetting resin. Therefore, it is possible to impart water repellency to the resin without adding a new catalyst when adding silicone.

  In the present invention, the thermosetting resin is selected from unsaturated polyester resins, vinyl ester resins, acrylic resins, and epoxy resins, and the functional groups present at both ends of the silicone are acrylic groups, methacrylic groups, and methacrylic groups. It is comprised by what is chosen from group, a hydroxyl group, a carboxyl group, and an epoxy group.

  By selecting the thermosetting resin and silicone in this way, the thermosetting resin and silicone are bonded at a high reaction rate, and the water repellency due to elution of unbound silicone is small, so that the water repellency is restored. Can be increased.

  In the present invention, the thermosetting resin is mixed with a filler made of an inorganic material.

  By adding an inorganic filler, mechanical properties such as heat resistance and impact resistance of the artificial marble molded body can be improved. Furthermore, since the filler is covered with silicone by chemically or physically bonding the terminal functional group of the silicone having functional groups at both ends and the filler, the gap between the resin and the filler is filled and soiled. A silane coupling treatment effect of preventing the penetration of the resin can also be obtained.

  In the present invention, the functional groups present at both ends of the silicone are functional groups different from each other, and one end side is selected from acrylic, methacrylic, carboxyl, and epoxy groups, and the other end side is a hydroxyl group. Features.

  By doing as described above, one end of the silicone is easily bonded to the resin, and the functional group at the other end is a functional group that is easy to coat the filler, so that the inorganic filler can be maintained while maintaining the bond with the resin. The covering effect on can be further improved.

  According to the present invention, since a water repellent having a water repellency recovery effect is added to the artificial marble resin molded body, sliding or surface coating treatment can be performed even if daily care using a cloth or sponge is performed. There is provided an artificial marble molded article that is free from polishing and recovers water repellency even after cleaning with chemicals and maintains the water repellency for a long period of time.

It is a figure of the time-dependent change of the water contact angle before and behind the sliding test of this invention. It is IR spectrum figure before and after the sliding test of a comparative example. It is IR spectrum figure before and behind the sliding test of this invention. It is IR imaging figure which shows aluminum hydroxide distribution of this invention. It is IR imaging figure which shows silicone distribution of this invention. It is IR imaging figure which shows aluminum hydroxide distribution of a comparative example. It is IR imaging figure which shows silicone distribution of a comparative example.

  Hereinafter, embodiments for carrying out the present invention will be described in detail.

  Examples of the water repellent having a water repellency recovery effect in the present invention include both-end-modified silicones having functional groups at both ends as shown below. Here, R1 and R2 are preferably polymerizable functional groups such as an acryl group, a methacryl group, an epoxy group, and a carboxyl group, and each of R1 and R2 may be the same or different functional groups. The main chain is a siloxane bond, and Rn in the side chain may be provided with an organic group for imparting water repellency to the resin surface. For example, polydimethylsiloxane having a methyl group can be mentioned, but other alkyl groups, phenyl groups, fluoro groups, and other functional groups that impart water repellency to the resin surface and functional groups that improve compatibility with the resin are side by side. It may be introduced into part or all of the chain. In addition, the radical polymerizable functional group may not be directly bonded to the siloxane bond, and a non-reactive methyl group or the like is bonded between the siloxane bond end and the radical polymerizable hydroxyl group like the carbinol group. Also good. In the present invention, one-end-modified silicone having a functional group at one end is substituted at one end of R1, R2 or Rn with a functional group having reactivity with resin, while the other end is made of resin. In which a substituent having no reactivity is substituted.

  The addition amount of both terminal-modified silicones is not particularly limited, but is about 0.5 to 10 parts, more preferably about 0.5 to 5 parts, relative to 100 parts by weight of the resin. This is because when the amount is less than 0.5 part, the water repellency of the resin surface is not sufficient, and when it exceeds 10 parts, the viscosity increases due to the addition of silicone and the molding processability decreases. Both terminal-modified silicones may be in the form of oil or an oil compound in which silicone oil is coated on an inorganic fine powder. In the case of oil, the number average molecular weight is 500 to 50,000, A group equivalent of about 100 to 5,000 is preferable. If the molecular weight is too large, the viscosity will increase, the orientation on the resin surface will deteriorate, and the dispersibility will decrease. Moreover, it is because there exists a problem which volatilizes at the time of hardening when molecular weight is too small.

In the artificial marble molded body of the present invention, a thermoplastic resin or a thermosetting resin can be used as the resin. Examples of the thermoplastic resin include PP and ABS, but are not particularly limited thereto. Examples of the thermosetting resin include, but are not limited to, an acrylic resin, an unsaturated polyester resin, a vinyl ester resin, an epoxy resin, and a urea resin. In addition, you may use these resin individually by 1 type or in mixture of multiple.
When a thermosetting resin is used as a resin, about 0.5 to 5 parts of a known radical polymerizable organic acid such as methyl ethyl ketone peroxide is usually added as a curing agent when the resin is cured by heating. It is done. Further, if the terminal functional groups of both terminal-modified silicones have radical polymerizable functional groups, the polymerization reaction proceeds by simply adding and heating the silicone during molding curing, and the resin can be easily reacted. In this case, what is necessary is just to change suitably the functional group of both terminal modified silicone according to the functional group which the thermosetting resin to be used has. For example, when an unsaturated polyester is used as the thermosetting resin, the main chain is an ester of a dihydric acid such as isophthalic acid, orthophthalic acid, fumaric acid or fumaric anhydride and a polyhydric alcohol such as ethylene glycol or propylene glycol. Since it forms a bond, the terminal functional groups of both terminal-modified silicones may be carboxyl groups or hydroxyl groups. Moreover, if an acryl group or a methacryl group is introduced into the functional group at the terminal of both terminal-modified silicones, it reacts with an unsaturated group such as styrene that constitutes the three-dimensional crosslinking. Similarly, since an unsaturated group undergoes radical polymerization during curing for an acrylic resin or a vinyl resin, an acrylic group, a methacryl group, or the like can be used as a functional group at both ends of the modified silicone. In addition, if the terminal functional group of the silane coupling agent is selected in accordance with the reactive functional group of the resin, such as a hydroxyl group that reacts with the silane coupling agent having an alkoxy group as a terminal functional group of the both-end-modified silicone. The resin and the both-end-modified silicone can be reacted efficiently.

  When inorganic filler is added, it is not particularly limited, but ceramic particles such as aluminum hydroxide, magnesium hydroxide, calcium carbonate, calcium silicate, calcium sulfate, barium sulfate, silica powder, talc, clay, alumina, mica (mica) ), Mineral-based pulverized materials such as sandstone. Among these, inorganic fillers having hydroxyl groups such as aluminum hydroxide and magnesium hydroxide react with both terminal-modified silicones having radically polymerizable functional groups when heated and cured, so that the surface is a silane coupling agent. It is coated as if. As a result, a gap generated at the interface between the resin and the filler can be filled, so that the contamination component can be prevented from entering. Moreover, about the said inorganic filler, you may coat | cover the surface beforehand using a silane coupling agent as needed. The compounding quantity of an inorganic filler is not specifically limited.

  In addition, design agents for the purpose of imparting design properties, organic and inorganic pigments, flame retardants that improve heat resistance, UV absorbers that improve light resistance, curing accelerators, reinforcing materials, internal mold release agents, thickening agents An agent, a low shrinkage material and the like may be added as necessary. Moreover, you may add the compatibilizer which controls the compatibility of the said additive containing water repellent and resin.

  As a method for producing artificial marble, a cast molding method in which a resin composition obtained by adding both end-modified silicones to a resin, adding a curing agent and a filler, and stirring the mixture is poured into a mold and heat-cured, or resin Known to obtain an artificial marble molded body, such as SMC molding method, in which both terminal-modified silicones are added to an SMC sheet, which is a resin paste mixed with additives such as a curing agent, a filler and an internal release agent, together with the additive It is only necessary to add to the method together with the resin.

  Hereinafter, the present invention will be described in detail using examples. The following examples are based on cast molding, but the present invention may be formed by any molding method such as press molding or injection molding using SMC or BMC, and resin and water repellent depending on the molding method. The form may be appropriately changed by a known method.

Example 1
4 parts by weight of methacryl-modified silicone at both ends was added to 100 parts by weight of the unsaturated polyester resin and sufficiently stirred. Thereafter, 0.5 to 2.5 parts by weight of methyl ethyl ketone peroxide as a curing agent was added to 100 parts by weight of the resin and further stirred for a predetermined time. Thereafter, 70 parts by weight, 120 parts by weight and 25 parts by weight of aluminum hydroxide, calcium carbonate and glass fiber as inorganic fillers were added to 100 parts by weight of the resin, respectively, and vacuum stirring was performed to obtain a resin composition. .

(Example 2)
4 parts by weight of both-end hydroxyl group-modified silicone is added to 100 parts by weight of unsaturated polyester resin, 0.4 part by weight of 3-methacryloxypropylmethyldiethoxysilane is added as a silane coupling agent, and the mixture is sufficiently stirred. . Thereafter, methyl ethyl ketone peroxide as a curing agent was added in an amount of 0.5 to 2.5 parts by weight with respect to 100 parts by weight of the resin, and further stirred for a predetermined time. Thereafter, as in Example 1, 70 parts by weight, 120 parts by weight, and 25 parts by weight of aluminum hydroxide, calcium carbonate, and glass fiber as inorganic fillers were added to 100 parts by weight of the resin, followed by vacuum stirring. A resin composition was obtained.

  The resin compositions obtained in Examples 1 and 2 were poured into an FRP mold that had been treated with a release agent in advance, and the cured resin composition was removed after a predetermined time, and further heated at 65 ° C. for 2 hours. Was completely cured. The surface of the obtained cured product was polished by sand blasting with # 800 to obtain an artificial marble molded body.

(Comparative Example 1)
In Example 1, instead of methacryl-modified silicone at both ends, one end-modified silicone having a methacrylic modification at one end but no functional group (having a methyl group) at the other end was 4% by weight with respect to 100 parts by weight of the resin. An artificial marble molded body was obtained by molding in the same manner as in Example 1 except that the part was added.

(Comparative Example 2)
Example 1 is the same as Example 1 except that polydimethyl silicone having no functional group at any of the terminal groups is added in an amount of 4 parts by weight based on 100 parts by weight of the resin instead of methacryl-modified silicone at both terminals. To obtain an artificial marble molded body.

(Comparative Example 3)
In Example 1, a moisture-curing type silicone made of ethyl polysilicate was applied to an artificial marble molded body which was molded without adding methacrylic modified silicone at both ends and the surface was polished by sandblasting, and predetermined at room temperature. By drying for a while and curing, an artificial marble molded body having a silicone coating on the surface was obtained.

(Comparative Example 4)
In Comparative Example 3, an artificial marble molded body was obtained without adding any silicone and without performing any coating treatment.

Evaluation 1: Measurement of static contact angle and IR spectrum for water before and after sliding test
The artificial marble moldings obtained in the examples and comparative examples were evaluated for water repellency maintenance and recovery performance when subjected to daily cleaning for a long period of time by the following methods.

A commercially available cloth cloth soaked with ethanol was attached to a sliding tester (manufactured by Tester Sangyo Co., Ltd.), and a sliding test was performed by sliding 2500 times at a load of 100 gf / cm ² . Moreover, the static contact angle and IR spectrum with respect to water before and after the sliding test were measured. The static contact angle with respect to water was measured by the θ / 2 method using a FACE contact angle meter CA-X150 (manufactured by Kyowa Interface Science) and the static contact angle 20 seconds after dropping a water droplet of 2 μL at room temperature. The IR spectrum was acquired by the ATR method using an infrared spectroscopic device (Spectraum 2000 manufactured by Perkin Elmer).

  FIG. 1 shows the results of measuring the water contact angle before and after the sliding test obtained in Example 1 and Comparative Examples 1 and 2, and further with time after the sliding test. In the examples, the water contact angle before the sliding test showed a water repellency of around 110 ° to 120 °. When sliding with a cloth impregnated with ethanol, the water contact angle temporarily decreases (87% of the initial value), but after about 24 hours, the water contact angle is about the same level as before the sliding test. It recovers to about ° (93% of initial). On the other hand, the artificial marble to which the one-end modified silicone of Comparative Example 1 and the polydimethylsilicone of Comparative Example 2 were added showed water repellency equivalent to that of Example 1 before the sliding test, but the water contact angle after the sliding test. Is significantly reduced (Comparative Example 1: 55% relative to the initial stage), and then the water contact angle is about 70 ° (Comparative Example 1: 59% relative to the initial stage). The water contact angle was the same as that of the molded body.

  In Example 1, each of the methacrylic groups of the methacrylic modified silicone at both ends is bonded to the unsaturated carbon in the unsaturated polyester to form a strong block polymer, so sliding is performed with a cloth impregnated with ethanol. However, almost no resin and water repellent silicone were wiped off, and no peeling occurred. This is because the bond angle of the siloxane bond constituting the silicone main chain is 143 °, the bond distance is 0.165 nm, the bond angle is wider and the bond distance is longer than the carbon-carbon (CC) bond. The molecular rotation obstacle is small. Therefore, when exposed to a substance having a polar group such as ethanol for a long time, the methyl group, which is a hydrophobic group substituted on the side chain of the both-end-modified silicone, rotates, and the siloxane bonding surface, which is a hydrophilic group, on the surface. It is considered that the water contact angle on the surface of the artificial marble is temporarily reduced by the orientation. However, after the sliding test, rotation of the molecular chain occurs again, and the methyl group, which is a hydrophobic group, is oriented on the surface, so that it is considered that the water repellency of the artificial marble surface is restored. It was also observed that the water repellency was gradually recovered after 24 hours. This is considered to be due to the dissolution of the resin and the unbonded silicone component. Therefore, the water repellency recovery rate and the recovery amount suitable for the use situation can be controlled by optimally controlling the bonded / unbonded state between the resin and the both terminal-modified silicones by the amount of the curing agent or the like. Further, as the unbonded silicone, a straight silicone having no modifying group may be used in combination with the both-end modified silicone.

In the one-end methacryl-modified silicone of Comparative Example 1, the water contact angle significantly decreases after the sliding test. This is presumably because when the modifying group is only at one end, the resin and silicone form a graft polymer, so that the bond breakage due to physical load due to sliding is likely to occur. Moreover, when the IR spectrum before and after the sliding test of the comparative example 1 shown in FIG. 2 is seen, the peak of 1260 cm ⁻¹ which is the peak of Si—CH ₃ bending vibration is reduced, and the silanol group (Si—OH) is reduced. since the peak in the vicinity of 3360cm ^-1 and 3620 cm ^-1 derived from the peak and OH stretching vibration derived from that 910 cm ^-1 is increased, it can be confirmed that the hydrolysis with ethanol proceeded. The same applies to the artificial marble to which polydimethyl silicone of Comparative Example 2 is added.

  In the example, as shown in FIG. 3, no significant increase in the peak derived from such silanol groups was observed before and after the sliding test, so that not only sliding due to cleaning but also degradation due to chemical loading such as alcohol is difficult. Aqueous can be maintained for a long time. In addition, the same tendency was observed when the chemical to be impregnated was changed from alcohol to acid or alkali.

Evaluation 2: Antifouling performance evaluation Next, 100 μL of theaflavin 100 ppm, which is a component of black tea pigment, was added to the surface of the artificial marble obtained in Examples and Comparative Examples as a pigment component stain, and the whole day at 25 ° C. and 50 RH%. After leaving it to stand, it was wiped off with a cloth containing water or a cloth containing detergent. The remaining condition of the dye component stains was visually confirmed, and the antifouling performance was evaluated by scoring in three stages.

◎: Dye stain is completely removed by only wiping with water ○: Dye stain is completely removed when detergent is used ×: Dye stain remains even when detergent is used

  In addition, assuming that the artificial marble obtained in Examples and Comparative Examples is used in a kitchen counter, a nylon nonwoven fabric (“Scotch Bright” manufactured by Sumitomo 3M Co., Ltd.) ( After the surface layer of 15 μm on the surface of the artificial marble was polished with a registered trademark, the antifouling performance was similarly evaluated.

  As can be seen from Table 1, the contamination test of the artificial marble to which the both-end modified silicones of the examples were added was better than that of the silicones of Comparative Examples 1 and 2. It was almost the same as Comparative Example 3 with the surface coated. On the other hand, the artificial marble with the coating of Comparative Example 3 had both ends modified in Example 1 while the coated layer was peeled off and the water repellency and antifouling performance were significantly lowered when the surface layer was polished. The artificial marble added with silicone maintains the same level of water repellency and antifouling performance as before polishing the surface layer, and the surface of the artificial marble deteriorated after long-term use in kitchen counters, etc. It was found that the high performance was maintained even after surface polishing was performed in order to impart state and design properties.

  Further, the silicone distribution on the surface of the resin molded body obtained in Example 1 was analyzed using a micro infrared imaging system (Agilent 660-IR infrared spectrophotometer, Agilent 620-IR infrared microscope, 32 × 32 multi-channel MCT detection) manufactured by Agilent. The range of 140 μm × 140 μm was evaluated by the IR imaging method using a 100 × 100 μm narrow-band MCT detector.

FIG. 4 shows the surface distribution of aluminum hydroxide, which is an inorganic filler component on the surface of the resin molded body of Example 1, with a peak at 3350 cm ⁻¹ derived from the hydroxyl group and a peak at 1726 cm ⁻¹ derived from the carbonyl group of the unsaturated polyester resin. It is a distribution obtained by correcting by dividing. FIG. 5 is a distribution obtained by similarly correcting the peak at 1260 cm ⁻¹ derived from the methyl group of silicone with the peak at 1726 cm ⁻¹ . 4 and 5, the region where the 3350 cm ⁻¹ / 1726 cm ⁻¹ ratio exceeds 1.5 mainly reflecting aluminum hydroxide of the filler, and the peak derived from silicone is 1260 cm ⁻¹ / Since the region where the 1726 cm ^-1 ratio is 0.2 to 0.4 overlaps, methacryl-modified silicone at both ends is coated with aluminum hydroxide, which is an inorganic filler, and stains in the artificial marble molded body It was confirmed that it was suppressed. (Example: FIGS. 4 and dashed parentheses of 5) Further, the silicone peak of 0.1 to 0.2 in FIG. 5, ^{1260 cm} -1 / 1726 cm ^-1 ratio even in a region where aluminum hydroxide 4 is not detected It was also confirmed that silicone was present not only in the filler region but also in the entire unsaturated polyester resin.

  On the other hand, FIGS. 6 and 7 show the aluminum hydroxide distribution and the silicone distribution (10 μm × 10 μm) of Comparative Example 1. FIG. In FIG. 6 and FIG. 7, in Comparative Example 1, since there is no correlation between the presence region of aluminum hydroxide and the high strength region of silicone, the inorganic filler is not specifically coated and is mainly graft-polymerized with the resin. It can be confirmed. From this, it was confirmed that the one-end methacryl-modified silicone has an insufficient effect of suppressing the infiltration of dirt into an artificial marble molded body added with an inorganic filler.

Claims (6)

In an artificial marble molded body obtained by blending a resin having a binding functional group with a water repellent and molding and curing it,
The water-repellent agent has a water-repellent-recovering effect that recovers the water-repellent property when the water-repellent property developed on the surface of the artificial marble is lowered by wiping the surface.   2. The artificial marble molded article according to claim 1, wherein the water repellent is a silicone having a functional group polymerizable with the resin at both ends and a hydrophobic functional group in a side chain. 3. .   The artificial marble molded body according to claim 2, wherein the resin is a thermosetting resin obtained by adding a curing agent to be cured by molding. The thermosetting resin is selected from unsaturated polyester resin, vinyl ester resin, acrylic resin, epoxy resin,
The artificial marble molded article according to claim 3, wherein the functional groups present at both ends of the silicone are composed of an acrylic group, a methacryl group, a hydroxyl group, a carboxyl group, and an epoxy group. .   The artificial marble molded body according to claim 4, wherein the thermosetting resin contains a filler made of an inorganic material.   The functional groups present at both ends of the silicone are different functional groups from each other, one end side is selected from acrylic, methacrylic, carboxyl group, epoxy group, and the other end side is a hydroxyl group, The artificial marble molded article according to claim 5.