KR20230003891A - Acrylic syrup composition - Google Patents

Abstract

An acrylic syrup composition according to the present invention has the advantage of securing stable heat resistance and mechanical strength while maintaining low viscosity by containing acrylic polymers with different molecular weights. Specifically, when manufacturing a molded product containing the same, mechanical strength such as Barcol hardness, impact strength, and heat resistance can be effectively improved while maintaining transparency. In addition, the molded product manufactured by using the acrylic syrup composition of the present invention has little yellowing caused by hot water, has excellent low-temperature curing, weather resistance, and chemical resistance, is advantageous for color development, and provides a luxurious feel due to matte properties such that the molded product is very suitable for use in artificial marble, bathtubs, sinks, and bathroom interior materials.

Description

Acrylic syrup composition {Acrylic syrup composition}

The present invention relates to an acrylic syrup composition and a molded article manufactured by including the same.

The acrylic syrup composition has excellent transparency, and it is easy to adjust the physical properties by changing the composition of the composition. Such an acrylic syrup composition may be used for applications such as adhesive sheets, adhesive films, protective coatings, forms, and adhesives, or for applications such as artificial marble, bathtubs, sinks, and interior materials.

The acrylic syrup composition is usually made of a mixture of an acrylic polymer and an acrylic monomer, and an additive such as an inorganic filler is added thereto and molded to prepare a molded product. The molded article may be injected in the form of a sheet, injected into a mold having a specific shape and cured, and may be manufactured through a molding process such as a sheet molding compound (SCM) or a bulk molding compound (BCM).

The viscosity of the acrylic syrup composition plays an important role in the manufacturing process of the molded product, and when the content of the acrylic polymer is increased to improve the heat resistance and mechanical strength of the molded product, the viscosity of the composition increases, limiting the content of the inorganic filler. A problem arises.

In addition, even when an acrylic syrup having a low viscosity including a prepolymer polymerized with an acrylic monomer is prepared and used, sufficient heat resistance and mechanical strength cannot be satisfied because the molecular weight of the prepolymer is low, or the content of the prepolymer is minimized. When used, shrinkage occurs after curing, making it difficult to manufacture good molded products.

Polyurethane-based resins can generally be used as other base resins, but in the case of polyurethane-based resins, elasticity and flexibility are excellent, but color expression and heat resistance are poor, and chemical resistance and weather resistance are poor.

Therefore, there is an urgent need for research and development on an acrylic syrup composition capable of maintaining low viscosity and exhibiting excellent heat resistance and mechanical strength.

KR 10-2019-0053690 A (2019.05.20)

An object of the present invention is to provide an acrylic syrup composition. Specifically, the acrylic syrup composition has a viscosity of 200 to 400 cP and low-temperature curability, and a cured product prepared including the same may have excellent heat resistance and mechanical strength.

In addition, an object of the present invention is to provide a molded product manufactured by curing a mixture including the acrylic syrup composition, magnesium hydroxide, an inorganic filler and an initiator.

In order to achieve the above object, the present inventors have constantly studied for the production of an acrylic syrup composition capable of securing excellent color expression and excellent heat resistance and mechanical strength. As a result, methyl methacrylate, acrylic polymer, polyfunctional acrylic monomer, polymerization inhibition When preparing an acrylic syrup composition including an agent and a thiol-based compound, it surprisingly has a viscosity of 200 to 400 cP and has excellent workability, and at the same time, it is found that mechanical strength such as Barcol hardness and impact strength and heat resistance are effectively improved. completed the present invention.

The present invention provides an acrylic syrup composition comprising methyl methacrylate, an acrylic polymer, a multifunctional acrylic monomer, a polymerization inhibitor, and a thiol compound. Preferably, the acrylic polymer has a weight average molecular weight of 15,000 to 60,000 g/mol and a glass transition temperature of 115 °C or less, and the acrylic syrup composition has a viscosity of 200 to 400 cP measured at 25 °C.

According to one embodiment of the present invention, the acrylic polymer is a first acrylic polymer having a weight average molecular weight of 15,000 to 60,000 g/mol and a glass transition temperature of 115 ° C or less and a weight average molecular weight of 80,000 to 120,000 g / mol and a glass transition temperature The second acrylic polymer having 100 to 120 °C may be mixed in a weight ratio of 1:0.005 to 0.5.

According to an embodiment of the present invention, 40 to 100 parts by weight of an acrylic polymer, 0.1 to 5 parts by weight of a polyfunctional acrylic monomer, 0.01 to 1 part by weight of a polymerization inhibitor, and 0.001 part by weight of a thiol-based compound, based on 100 parts by weight of the methyl methacrylate. to 0.05 parts by weight.

According to one embodiment of the present invention, the multifunctional acrylic monomer is ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, ethylene glycol divinyl ether, It may be one or two or more selected from the group consisting of diethylene glycol divinyl ether, triethylene glycol divinyl ether, and divinylbenzene.

According to one embodiment of the present invention, the polymerization inhibitor may be one or two or more selected from the group consisting of hydroquinone, methoxyphenol, and butylated hydroxy toluene.

According to an embodiment of the present invention, the thiol-based compound may be one or two or more selected from the group consisting of normal dodecyl mercaptan, thiosalicylic acid, and 3-mercaptopropionic acid.

According to one embodiment of the present invention, the polymerization inhibitor and the thiol-based compound may be included in a weight ratio of 1:0.01 to 0.5.

A molded article manufactured by curing a mixture including an acrylic syrup composition, magnesium hydroxide, an inorganic filler, and an initiator according to an embodiment of the present invention may be provided.

According to one embodiment of the present invention, the molded product may be selected from sheets, artificial marble, containers, and interior/exterior materials for interior use.

The acrylic syrup composition according to the present invention has the advantage of securing stable heat resistance and mechanical strength while maintaining a viscosity of 200 to 400 cP by including acrylic polymers having different molecular weights. Specifically, when manufacturing a molded product including this, workability is excellent, and at the same time, mechanical strength and heat resistance such as Barcol hardness and impact strength can be effectively improved.

In addition, the molded article manufactured using the acrylic syrup composition of the present invention has little yellowing by hot water, has excellent low-temperature curing properties, weather resistance and chemical resistance, is advantageous in color expression, and gives a luxurious feeling due to matte properties, so it is not artificial. It is very suitable for use in marble, bathtubs, sinks, and bathroom interior materials.

The acrylic syrup composition according to the present invention will be described in more detail through the following examples. However, the following examples are only references for explaining the present invention in detail, but the present invention is not limited thereto, and may be implemented in various forms.

Also, unless defined otherwise, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is merely to effectively describe specific embodiments and is not intended to limit the present invention.

"Acrylic" as described herein includes acrylic and methacrylic.

"Polymer" as described herein includes polymers and copolymers obtained by reacting one or more monomers.

The present invention will be described in detail as follows.

The present invention provides an acrylic syrup composition comprising methyl methacrylate, an acrylic polymer, a multifunctional acrylic monomer, a polymerization inhibitor, and a thiol compound. Preferably, the acrylic polymer has a weight average molecular weight of 15,000 to 60,000 g/mol, preferably 15,000 to 50,000 g/mol, more preferably 15,000 to 40,000 g/mol, and a glass transition temperature of 115 °C or less, preferably 90 to 115 °C, more preferably 95 to 110 °C. When the above range is satisfied, it is good that the acrylic syrup can have a viscosity of 200 to 400 cP, and the cured product prepared including it can express transparency, excellent heat resistance and mechanical strength, which is very good.

In addition, the acrylic syrup composition is characterized in that the viscosity is 200 to 400 cP. An acrylic syrup composition satisfying the above range has excellent miscibility and flowability even when an inorganic filler is further added, and may have a viscosity suitable for injection into a mold in a process such as molding. In addition, since the injection of the mixture can be completed before curing begins, a molded product with a smooth surface and excellent durability can be manufactured, which is very good. If the viscosity of the acrylic syrup composition is less than 200 cP, the flowability is excessive and workability is not good, and if it exceeds 400 cP, miscibility and flowability are not good, and curing may start before the mixture injection is completed. It is not desirable to have

According to one embodiment of the present invention, the acrylic polymer has a weight average molecular weight of 15,000 to 70,000 g/mol, preferably 15,000 to 60,000 g/mol, more preferably 15,000 to 40,000 g/mol, and a glass transition temperature of 115 °C. Below, preferably 90 to 110 ℃, more preferably 95 to 105 ℃, the first acrylic polymer having a polydispersity index (PDI) of 5.0 or less or 1.0 to 2.0 and a weight average molecular weight of 70,000 to 150,000 g / mol, preferably 80,000 to 120,000 g/mol, more preferably 80,000 to 110,000 g/mol, a glass transition temperature of 95 to 120 °C, preferably 100 to 120 °C, more preferably 100 to 115 °C, and a polydispersity index (PDI) of 3.0 or less or 1.0 to 1.5 may include a second acrylic polymer.

According to one embodiment of the present invention, the first acrylic polymer and the second acrylic polymer may be mixed at a weight ratio of 1: 0.005 to 0.5, specifically 1: 0.01 to 0.5 weight ratio, and more specifically 1: 0.05 to 0.3 weight ratio. there is. When the above range is satisfied, the acrylic syrup composition may have a viscosity desired in the present invention, and the curing time may be appropriately controlled, and a cured product prepared including the above may exhibit excellent heat resistance and mechanical strength. there is very good

According to one embodiment of the present invention, 40 to 100 parts by weight of acrylic polymer, preferably 40 to 80 parts by weight, 0.1 to 5 parts by weight of polyfunctional acrylic monomer, preferably 0.5 to 3 parts by weight, based on 100 parts by weight of the methyl methacrylate Part by weight, 0.01 to 1 part by weight of polymerization inhibitor, preferably 0.01 to 0.5 part by weight and 0.001 to 0.05 part by weight of a thiol-based compound, preferably 0.001 to 0.03 part by weight. When the above range is satisfied, an acrylic syrup composition having transparency, viscosity of 200 to 400 cP and low-temperature curability may be prepared.

According to one embodiment of the present invention, the multifunctional acrylic monomer is not particularly limited as long as it is a monomer having two or more functional groups, but examples include ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, tri It may be one or two or more selected from the group consisting of ethylene glycol di(meth)acrylate, ethylene glycol divinyl ether, diethylene glycol divinyl ether, triethylene glycol divinyl ether and divinylbenzene, and preferably ethylene glycol di It may be acrylate, ethylene glycol dimethacrylate or diethylene glycol dimethacrylate.

According to one embodiment of the present invention, the polymerization inhibitor is not particularly limited as long as it is a conventionally used or known polymerization inhibitor, but a phenolic polymerization inhibitor may be used without limitation, for example, hydroquinone, methoxyphenol And it may be one or two or more selected from the group consisting of butylated hydroxy toluene and the like, and a mixture of them may be used, but is not limited thereto.

According to one embodiment of the present invention, the thiol-based compound may be used to accelerate the curing reaction, and is not particularly limited as long as it has one or more thiol groups in a molecule and is commonly used or known thiol-based compound. For example, polyol and Thiol compounds obtained by esterification of mercapto organic acids; alkyl polythiol compounds such as butanethiol, pentanethiol, hexanethiol, octanethiol, nonanethiol and decanethiol; It may be a polyether containing a terminal thiol group and a polythiol ether containing a terminal thiol group. Specifically, it may be one or two or more selected from the group consisting of normal dodecyl mercaptan, thiosalicylic acid, and 3-mercaptopropionic acid (3-MPA).

According to one embodiment of the present invention, the polymerization inhibitor and the thiol-based compound may be included in a weight ratio of 1: 0.01 to 0.5, specifically 1: 0.05 to 0.5, more specifically 1: 0.05 to 0.3. In the case of an acrylic syrup composition that satisfies the above range, it can have a more advantageous curing time in a molded product manufacturing process such as a molding process, and thus can play an important role in manufacturing a product of excellent quality.

A molded article manufactured by curing a mixture including an acrylic syrup composition, magnesium hydroxide, an inorganic filler, and an initiator according to an embodiment of the present invention may be provided. Specifically, 0.01 to 5 parts by weight, preferably 0.1 to 5 parts by weight of magnesium hydroxide, 50 to 300 parts by weight, preferably 100 to 200 parts by weight, and 0.1 to 10 parts by weight of an initiator, based on 100 parts by weight of the acrylic syrup composition, Preferably, it may be cured by including 0.1 to 5 parts by weight. In particular, when the acrylic syrup composition of the present invention is used, the composition has a viscosity of 200 to 400 cP, providing excellent workability in the process of preparing the mixture, and at the same time heat resistance and mechanical properties of the cured product or molded article cured from the mixture. It is very good because the strength can be effectively improved.

The inorganic filler is limestone, mica, silica, calcium carbonate, magnesium carbonate, aluminum nitride, boron nitride, silicon nitride, aluminum hydroxide, hydrotalcite, magnesium hydroxide, calcium hydroxide, wollastonite, bentonite, silica, alumina, titanium oxide , Barium sulfate, calcium sulfate, any one selected from the group consisting of talc and glass fibers, or a mixture of two or more may be used, preferably silica (SiO ₂ ).

The initiator is not particularly limited as long as it is commonly used, but specific examples include sulfates selected from potassium persulfate, sodium persulfate, ammonium persulfate, lithium persulfate and iron sulfate, 2,2'-azo- azos selected from bis(isobutyronitrile), 2,2'-azo-bis(2,4-dimethylvaleronitrile) and 1-t-butyl-azocyanocyclohexane, t-butyl peroxide, t-butyl hydroperoxide, cumene hydroperoxide, diisopropyl benzene hydroperoxide, paramethane hydroperoxide, benzoyl peroxide, caprylyl peroxide, di-t-butyl peroxide, ethyl 3,3'- A peroxide selected from di(tbutylperoxy)butyrate, ethyl 3,3'-di(t-amylperoxy)butyrate, t-amylperoxy-2-ethyl hexanoate, and t-butylperoxypybylate; Selected from peresters selected from t-butyl peracetate, t-butyl perphthalate and t-butyl perbenzoate, and percarbonates selected from di(1-cyano-1-methylethyl) peroxy dicarbonate, etc. It may include any one or a mixture of two or more, but is not limited thereto.

When a cured product is prepared by curing the mixture, it may have excellent heat resistance and mechanical strength. For example, for the heat resistance of the cured product, the heat resistance test result according to the present invention may be "no abnormality", the linear expansion coefficient may be 3.0 x 10 ^-5 / ° C or more, the heat load deformation temperature may be 90 ° C or more, and the Barcol hardness may be 60 Above, the impact strength may be 15 J/m or more, the tensile strength may be 20 MPa or more, and the flexural strength may be 50 MPa, and the upper limit of the physical properties is not particularly limited.

In addition, a product obtained by curing the mixture is referred to as a cured product, and a product obtained by curing and molding the mixture may be referred to as a molded product. The molded product is injection molding, compression molding, transfer molding, thermoforming, blow molding, film blowing, extrusion molding, If it is used as a general stone or a known molding method, such as calendering and expanding molding, it can be used without limitation. As another example, molding methods for manufacturing composite materials such as sheet molding compound (SMC), bulk molding compound (BMS), and resin transfer molding (RTM) may also be used.

According to one embodiment of the present invention, the molded article (cured product) can be used as a sheet, artificial marble, container, interior/exterior material for interior use, and the like. The molded article prepared using the acrylic syrup composition of the present invention has little yellowing by hot water, has excellent low-temperature curing properties, weather resistance and chemical resistance, is advantageous in color expression, and gives a luxurious feeling due to its matte properties, so it is artificial marble, It is very suitable for use in bathtubs, sinks, and bathroom interior materials.

Hereinafter, the present invention will be described in detail with reference to examples. However, these are for explaining the present invention in more detail, and the scope of the present invention is not limited by the following examples.

Also, unless defined otherwise, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is merely to effectively describe specific embodiments and is not intended to limit the present invention.

[Physical property measurement method]

1) Viscosity [cP]

The viscosity of the acrylic syrup prepared in Examples and Comparative Examples was measured at room temperature (25±1° C.) at 100 rpm with a Brookfield viscometer using spindle No.3.

2) Barcol Hardness

The Barcol hardness of the cured products prepared in Examples and Comparative Examples was measured according to ASTM D 2583-07 for Rockwell hardness. A Barcol hardness tester (Instron B2000) was used. Barcol hardness was evaluated as ◎, ○, △, × according to the following criteria.

◎ (excellent): 65 or higher

○ (normal): 60 or more and less than 65

△ (insufficient): 50 or more and less than 60

× (bad): less than 50

3) Izod Impact Strength [J/m]

The impact strength of the cured products prepared in Examples and Comparative Examples was measured according to ASTM D 256-06ae1 (Method A). An Izod type impact tester (JJHBT-6501, JJ-test) was used. Impact strength was evaluated as ◎, ○, △, × according to the following criteria.

◎ (excellent): 15 or more

○ (normal): 10 or more and less than 15

△ (insufficient): 5 or more and less than 10

× (bad): less than 5

4) Tensile strength [MPa]

The tensile strength of the cured products prepared in Examples and Comparative Examples was measured according to ASTM D 638-08. A universal testing machine (UTM 5982, INSTRON) was used. Tensile strength was evaluated as ◎, ○, △, × according to the following criteria.

◎ (excellent): 30 or more

○ (normal): 25 or more and less than 30

△ (insufficient): 20 or more and less than 25

× (bad): less than 20

5) Bending strength [MPa]

The flexural strength of the cured products prepared in Examples and Comparative Examples was measured according to ASTM D 790-07e1. A universal testing machine (UTM 5982, INSTRON) was used. Flexural strength was evaluated as ◎, ○, △, × according to the following criteria.

◎ (excellent): 55 or more

○ (normal): 50 or more and less than 55

△ (insufficient): 45 or more and less than 50

× (bad): less than 45

6) Coefficient of linear expansion (α) [1/℃]

The coefficient of linear expansion of the cured products prepared in Examples and Comparative Examples was measured according to KS M 3015.

7) HDT (Heat Deflection Temperature) [℃]

The heat load deflection temperatures of the cured products prepared in Examples and Comparative Examples were measured according to ASTM D 648-07 (Method B) 790-07e1.

8) Discoloration

The yellowness of the cured products prepared in Examples and Comparative Examples was measured according to ISO 13465-1, and the degree of discoloration was evaluated according to the results. When the yellowness was less than 3.0, it was evaluated as "no abnormality", and when it was 3.0 or more, it was evaluated as "discoloration".

9) heat resistance

The heat resistance of the cured products prepared in Examples and Comparative Examples was measured according to JIS K 6902.

[Example 1] Preparation of acrylic syrup composition

62.4 g of methyl methacrylate was added to a beaker, followed by 0.6 g of ethylene glycol dimethacrylate (DGDMA), 35 g of PMMA (Mw: 25,000 g/mol, Tg: 101° C.) as the first acrylic polymer, and 35 g of the second acrylic polymer. After adding 2 g of polymer PMMA (Mw: 90,000 g/mol, Tg: 102° C.), 0.015 g of a phenolic polymerization inhibitor, and 0.0025 g of a thiol-based compound, the mixture was stirred for a sufficient time to completely dissolve to prepare an acrylic syrup composition. . In addition, as a result of measuring physical properties by melting and mixing the first acrylic polymer and the second acrylic polymer, their weight average molecular weight was 30,000 g/mol and the glass transition temperature was measured to be 101 °C.

[Examples 2 to 5]

It proceeded in the same manner as in Example 1, except that the content of the composition was adjusted and added according to Table 1 below. In Example 2, the ratio of the first acrylic polymer and the second acrylic polymer is varied, in Example 3, the content of EGDMA is increased, and in Examples 4 and 5, the ratio of the polymerization inhibitor and the thiol-based compound is varied. .

[Comparative Examples 1 to 5]

It proceeded in the same manner as in Example 1, except that the content of the composition was adjusted and added according to Table 1 below. In Comparative Example 1, methyl methacrylate in Example 1 was replaced with a styrene monomer, in Comparative Example 2, only EGDMA was excluded, in Comparative Example 3, only the second acrylic polymer was excluded, and in Comparative Example 4, only the first acrylic polymer was used. Comparative Example 5 uses a third acrylic polymer having a weight average molecular weight of 70,000 g/mol and a glass transition temperature of 116 °C instead of the acrylic polymer.

In order to prepare a specimen for measuring physical properties, 0.1 part by weight of a thiol-based compound, 0.6 part by weight of magnesium hydroxide, 138 parts by weight of SiO ₂ and 1.7 parts by weight of an initiator were added to 100 parts by weight of the acrylic syrup composition prepared in the above Examples and Preparation Examples. It was added as is and mixed evenly. The mixture was injected into a mold having dimensions of 12 cm x 24 cm x 1.5 cm in width, length and height, and left at room temperature for 40 minutes or longer until completely cured. The physical properties of the prepared cured product were evaluated and are shown in Table 2 below.

(parts by weight) MMA SM EGDMA No. 1
acrylic polymer No. 2
acrylic polymer 3rd
acrylic polymer polymerization inhibitor thiol compounds Viscosity
(cP) Example 1 100 - 1.0 56.1 3.2 - 0.024 0.004 230 Example 2 100 - 1.0 48.1 11.2 - 0.024 0.004 310 Example 3 100 - 5.0 56.1 3.2 - 0.024 0.004 300 Example 4 100 - 1.0 56.1 3.2 - 0.032 0.008 240 Example 5 100 - 1.0 56.1 3.2 - 0.04 0.012 240 Comparative Example 1 - 100 1.0 56.1 3.2 - 0.024 0.004 240 Comparative Example 2 100 - - 56.1 3.2 - 0.024 0.004 220 Comparative Example 3 100 - 1.0 59.3 - - 0.024 0.004 150 Comparative Example 4 100 - 1.0 - 59.3 - 0.024 0.004 530 Comparative Example 5 100 - 1.0 - - 59.3 0.024 0.004 480

MMA: methyl methacrylate monomer

SM: styrene monomer

(parts by weight) Barcol hardness impact strength The tensile strength flexural strength α HDT(℃) discoloration heat resistance Example 1 ◎ ◎ ◎ ◎ ^4.0x10-5 98 nothing strange nothing strange Example 2 ◎ ◎ ○ ◎ ^4.0x10-5 102 nothing strange nothing strange Example 3 ◎ ◎ ○ ◎ ^4.0x10-5 100 nothing strange nothing strange Example 4 ◎ ◎ ◎ ◎ ^4.0x10-5 97 nothing strange nothing strange Example 5 ◎ ◎ ◎ ◎ ^4.0x10-5 96 nothing strange nothing strange Comparative Example 1 × ○ × × ^4.0x10-5 67 discoloration error Comparative Example 2 ○ ○ △ △ ^4.0x10-5 76 nothing strange nothing strange Comparative Example 3 △ ○ △ △ ^4.0x10-5 91 nothing strange nothing strange Comparative Example 4 ◎ ◎ ◎ ◎ ^4.0x10-5 104 nothing strange nothing strange Comparative Example 5 ○ ◎ ◎ ◎ ^4.0x10-5 94 nothing strange nothing strange

As shown in Tables 1 and 2, the acrylic syrup composition according to the present invention maintains a viscosity of 200 to 400 cP, and at the same time has good mechanical properties such as Barcol hardness, impact strength and flexural strength, and above all, heat load deformation temperature , it was confirmed that the thermal resistance properties such as linear expansion coefficient and heat resistance were excellent.

In addition, when comparing Example 1 and Comparative Examples 3 to 5, when using an acrylic polymer having a weight average molecular weight of 70,000 g / mol and 90,000 g / mol, the viscosity of the composition increases, and the two polymers having a molecular weight difference ( 25,000 g/mol and 90,000 g/mol) at a certain ratio and used, it can be seen that mechanical properties such as viscosity of 200 to 400 cP, excellent hardness and strength, and stable heat resistance can be satisfied at the same time. The effect of the acrylic syrup composition according to the present invention could be confirmed.

In addition, Example 1 showed a curing time of 43 minutes, Example 4 33 minutes, and Example 5 34 minutes. It was confirmed that the curing time can be adjusted.

As described above, in the present invention, an acrylic laminate film with excellent UV blocking function, a manufacturing method thereof, and a techosheet manufactured therefrom have been described through specific details and limited examples, but this is provided to help a more general understanding of the present invention. However, the present invention is not limited to the above embodiments, and various modifications and variations can be made from these descriptions by those skilled in the art in the field to which the present invention belongs.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and it will be said that not only the claims to be described later, but also all modifications equivalent or equivalent to these claims belong to the scope of the present invention. .

Claims (9)

An acrylic syrup composition comprising methyl methacrylate, an acrylic polymer, a multifunctional acrylic monomer, a polymerization inhibitor, and a thiol compound, wherein the acrylic polymer has a weight average molecular weight of 15,000 to 60,000 g/mol and a glass transition temperature of 115 °C or less And, the acrylic syrup composition has a viscosity of 200 to 400 cP measured at 25 ℃. According to claim 1,
The acrylic polymer includes a first acrylic polymer having a weight average molecular weight of 15,000 to 60,000 g/mol and a glass transition temperature of 115° C. or less, and a second acrylic polymer having a weight average molecular weight of 80,000 to 120,000 g/mol and a glass transition temperature of 100 to 120° C. An acrylic syrup composition in which polymers are mixed in a weight ratio of 1:0.005 to 0.5. According to claim 1,
40 to 100 parts by weight of an acrylic polymer, 0.1 to 5 parts by weight of a multifunctional acrylic monomer, 0.01 to 1 part by weight of a polymerization inhibitor, and 0.001 to 0.05 parts by weight of a thiol compound based on 100 parts by weight of the methyl methacrylate. syrup composition. According to claim 1,
The multifunctional acrylic monomer is ethylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, triethylene glycol di(meth)acrylate, ethylene glycol divinyl ether, diethylene glycol divinyl ether, triethylene An acrylic syrup composition comprising one or two or more selected from the group consisting of glycol divinyl ether and divinylbenzene. According to claim 1,
The polymerization inhibitor is one or two or more acrylic syrup composition selected from the group consisting of hydroquinone, methoxyphenol and butylated hydroxy toluene. According to claim 1,
The thiol-based compound is one or two or more selected from the group consisting of normal dodecyl mercaptan, thiosalicylic acid, and 3-mercaptopropionic acid. Acrylic syrup composition. According to claim 1,
The polymerization inhibitor and the thiol-based compound are 1: acrylic syrup composition contained in a weight ratio of 0.01 to 0.5. A molded product manufactured by curing a mixture including the acrylic syrup composition of any one of claims 1 to 7, magnesium hydroxide, an inorganic filler and an initiator. According to claim 8,
The molded article is a molded article selected from sheets, artificial marble, containers, and interior/exterior materials for interior