KUMPULAN INFORMASI

Artificial Marble

Dikumpulkan oleh: Rahartri

LEMBAGA ILMU PENGETAHUAN INDONESIA PUSAT DOKUMENTASI DAN INFORMASI ILMIAH Serpong, Desember 2011

1. United States Patent Sung

8,063,117 November 22, 2011

Artificial marble and preparation process thereofAbstract The present invention relates to an artificial marble comprising a base resin part; and a pearl stripe part which contains a matrix resin and pearls, and expresses stripes on said base resin part by the contained pearls and a process for preparing the same. The present invention may provide an artificial marble, which can embody higher grade appearance effects by concentrating pearl into the parts expressing stripes of the artificial marble and freely regulating color, quality of pearl and/or patterns of stripes, and a process for preparing the same. 2. United States Patent Buskila , et al. 8,026,298 September 27, 2011

Method of manufacturing artificial marbleAbstract A method for the preparation of an engineered stone slab having coated lumps of composite stone material, the method comprising: scooping a first inorganic particulate material and a polymer material to produce lumps of composite stone material; mixing a second inorganic particulate material with the lumps to produce coated lumps; and adding one or more colorants to the first inorganic particulate material, to the second inorganic particulate material, or to both the first and second inorganic particulate materials. 3. United States Patent Choi , et al. 8,017,051 September 13, 2011

Process for producing acrylic artificial marble having natural patternAbstract The artificial marble with good natural pattern and color in accordance with the present invention is prepared mixing ununiformly at least two liquid resins through a line mixer 1, feeding the ununiformly mixed resin on a moving steel belt 4 at a constant speed through a flexible hose 2 and an exit nozzle 3, and reciprocating the exit nozzle perpendicularly to the steel belt by a predetermined program for the exit nozzle to stop at different positions for different durations. The line mixer used in this invention is a Kenics type and has inner elements of eight or less than eight. A line mixer with four to eight elements can be more preferably used.

4. United States Patent Kim , et al.

7,935,744 May 3, 2011

Artificial marble having quartz effect using transparent chip and process for preparing the sameAbstract An artificial marble using transparent chips, and a process for preparing the same, in which transparent chips are prepared by crushing a flat plate made of a composite for the artificial marble, which does not contain an inorganic filler and thus maintains transparency, quartz chips are prepared by crushing a flat plate made of a mixture of the transparent chips and a composite for the artificial marble, which contains an inorganic filler, for uniforming the specific gravity of the quartz chips, and the artificial marble is prepared by applying the quartz chips to a raw material composite for the artificial marble, thereby allowing the artificial marble to have the uniform specific gravity and exhibit a quartz effect. 5. United States Patent Sung , et al. 7,935,281 May 3, 2011

Artificial marble using multicolor chip and method for preparing the sameAbstract Disclosed herein are an artificial marble using multicolor chips, particularly striped chips, and a method for preparing the artificial marble. Since the artificial marble comprises multicolor chips in a new form together with conventional single-color chips, it enables achievement of various appearances, including designs and colors, thereby being highly differentiated from conventional artificial marbles containing combination of single-color chips as well as displaying patterns and designs closely resembling natural granite. 6. United States Patent Kwon , et al. 7,749,418 July 6, 2010

Method for continuously producing artificial marble and apparatus thereforAbstract Disclosed are a method and an apparatus for continuously producing an artificial marble plate capable of simultaneously and uniformly hardening a raw material compound for an artificial marble plate, preventing the warpage of the artificial marble plate, and improving heat transmission efficiency and productivity. The apparatus includes upper and lower carrier films facing each other and receiving a raw material compound for the artificial marble plate into a gap therebetween; upper and lower horizontal heating plates, each including temperature controlling

means and heating means for heating upper and lower surfaces of the raw material compound at the same temperature by the same heat transmission manner to harden the raw material compound, while the upper and lower carrier films moving along a gap between the upper and lower horizontal heating plates; and a pair of gaskets disposed at horizontal edges of the upper and lower carrier films for regulating thickness and width of the artificial marble plate obtained by hardening the raw material compound. 7. United States Patent Choi 7,638,189 December 29, 2009

Artificial marble containing transparent chip using co-extrusion and process for preparing the sameAbstract There are disclosed an artificial marble containing pellet-shaped transparent chips, obtained by coating the outer surface of an internal transparent resin layer with a resin layer containing a filler having a high specific gravity using co-extrusion, and a process for preparing the same. The artificial marble using the transparent chips as coloring chips, thus not causing the occurrence of layer separation of the transparent chips, which conventionally occurred in an artificial marble using transparent chips made of a single component, being distinguished from a conventional artificial marble made of combination of the single-colored chips, and expressing a pattern similar to a natural granite. 8. United States Patent Sung , et al. 7,500,899 March 10, 2009

Artificial marble using multicolor chip and method for preparing the sameAbstract Disclosed herein are an artificial marble using multicolor chips, particularly striped chips, and a method for preparing the artificial marble. Since the artificial marble comprises multicolor chips in a new form together with conventional single-color chips, it enables achievement of various appearances, including designs and colors, thereby being highly differentiated from conventional artificial marbles containing combinations of single-color chips as well as displaying patterns and designs closely resembling natural granite.

9. United States Patent Kwon

7,427,642 September 23, 2008

Artificial marble reutilizing waste materials and preparation thereofAbstract Provided is a process for preparing an artificial marble plate by reutilizing waste materials such as defective goods of conventional industrial highly light-transmissive polymethylmethacrylate based sheets, remnants produced during product-processing and the like, including polymethylmethacrylate based LCD light guide panels, having a refractive index of 1.47 to 1.53 and excellent optical characteristics wherein the polymer has an average molecular weight of 30,000 to 150,000. 10. United States Patent Kwon , et al. 7,160,093 January 9, 2007

Apparatus for continuously producing artificial marbleAbstract Disclosed is an apparatus for continuously producing an artificial marble plate capable of simultaneously and uniformly hardening a raw material compound for an artificial marble plate, preventing the warpage of the artificial marble plate, and improving heat transmission efficiency and productivity. The apparatus includes upper and lower carrier films facing each other and receiving a raw material compound for the artificial marble plate into a gap therebetween; upper and lower horizontal heating plates receiving the upper and lower carrier films into a gap therebetween, each including temperature controller and heater for heating upper and lower surfaces of the raw material compound at the same temperature by the same heat transmission manner to harden the raw material compound; and a pair of gaskets disposed at horizontal edges of the upper and lower carrier films for regulating thickness and width of the artificial marble plate obtained by hardening the raw material compound. 11. United States Patent Yukawa , et al. 6,946,508 September 20, 2005

Artificial marble and producing method thereofAbstract A molding compound in swelling gel phase is prepared by crushing a swelling gel, swelled with a monomer in liquid phase which polymerizes a compound having three-dimensional linking by a radical polymerization reaction, into a predetermined size, and a molding compound (z) is made to adhere to a surface of the molding compound in swelling gel phase so that color difference between a color tone of the molding compound (z) and a color tone of the molding compound in swelling gel phase is not less than 3 in a case where the molding compound (z) is provided on the surface of the molding compound in swelling gel phase, which does not substantially dissolve in the monomer and has a weight change ratio ranging from 0 to +200% in a case where the molding compound in swelling gel phase is completely impregnated with the monomer, so that the molding

compound in swelling gel phase and the molding compound (z) are molded under a thermal pressure, and a ratio of the molding compound (z) to a total amount of the molding compound (z) and the molding compound in swelling gel phase is not less than 0.01 weight % and not more than 30 weight %. 12. United States Patent Hur , et al. 6,527,994 March 4, 2003

Method for preparing artificial marble of wave/wood patternAbstract Disclosed is a method for preparing artificial acrylic marble of wave/wood patterns by use of an apparatus comprising a rotational body and a liquid resin feeder. The liquid resin feeder comprises at least two liquid resin inlets, a single liquid resin outlet, and a mobile molding belt. The rotational body has a rotating shaft with a plurality of spaced wings and is rotated clockwise or counterclockwise in the partially intermixed liquid resins on the mobile molding belt to form a wave/wood pattern while the liquid resins are cured. The wings are fixed along the shaft of the rotating body and alternately approach the bottom and the top of the liquid resins on the belt during the rotation of the rotating body. Thus, the artificial acrylic marble is provided with new patterns like wood and wave patterns and can be aesthetically harmonized with wood materials. 13. United States Patent Yamamoto , et al. 6,475,631 November 5, 2002

Antimicrobial agent, antimicrobial resin composition and antimicrobial artificial marbleAbstract The present invention provides an antimicrobial agent consisting of glass which comprises 50 to 60 mole % of ZnO, 20 to 30 mole % of at least one member selected from the group consisting of B.sub.2 O.sub.3 and P.sub.2 O.sub.5, 1 to 10 mole % of at least one member selected from the group consisting of Al.sub.2 O.sub.3 and ZrO.sub.2, 5 to 10 mole % of an alkali metal oxide and 0 to 15 mole % of SiO.sub.2 and an antimicrobial agent consisting of glass which comprises 50 to 70 mole % of ZnO, 20 to 35 mole % of P.sub.2 O.sub.5, 0.5 to 10 mole % of Al.sub.2 O.sub.3, 0.5 to 10 mole % of SnO.sub.2, 0 to 5 mole % of SiO.sub.2 and 5 to 10 mole % of an alkali metal oxide as well as an antimicrobial resin composition and antimicrobial artificial marble, each of which comprises a resin and the antimicrobial agent blended therewith. The antimicrobial resin composition and the antimicrobial artificial marble are excellent in their antimicrobial properties, resistance to color change and water resistance. 13. United States Patent Koyanagi , et al. 6,451,910 September 17, 2002

Acrylic premix, acrylic artificial marble and production method thereofAbstract An acrylic premix comprising 10 to 90% by weight of (A) an acrylic resin composition consisting of an acrylic mono-functional monomer (a1), an acrylic poly-functional monomer (a2) containing at least one compound represented by any of the following general formulae (I) to (IV), and an acrylic polymer (b); 10 to 90% by weight of an inorganic filler (B); and 0.01 to 10 parts by weight of a curing agent (C) based on 100 parts by weight of the total amount of the components (A) and (B); acrylic artificial marble using the same; and a method for producing the same. The premix is useful for providing an acrylic SMC or BMC having excellent molding property at high temperature, molding processability, thickening property and storage stability. ##STR1## 14. United States Patent Mukai , et al. 6,387,304 May 14, 2002

Method of manufacturing artificial marble having stripe patternAbstract A method for producing artificial marble having a stripe pattern comprising injecting liquid resins having different colors into a molding cell so that they are laminated to form two or more layers; then moving a comb-like tool through the laminated liquid resins while allowing the teeth to contact the bottom surface of the molding cell, then curing the liquid resins to form artificial marble, wherein, the comb-like tool is allowed to move through the liquid resins while the interval between teeth of the comb-like tool is allowed to vary. Artificial marble can be produced having a natural marble-like appearance in which the interval of stripe varies in a natural fashion or having a radial cut moire stripe pattern.

15. United States Patent Ikegami , et al.

6,323,259 November 27, 2001

Acrylic resin composition, acrylic premix, process for producing acrylic artificial marble and thickening agentAbstract The present invention is directed to an acrylic resin composition obtained by adding a noncrosslinked polymer powder having a bulk density within the range from 0.1 to 0.7 g/ml, an oil absorption based on linseed oil within the range from 60 to 200 ml/100 g and a degree of swelling by methyl methacrylate of 16-fold or more as a thickening agent to acrylic syrup; and acrylic

premix obtained by mixing an inorganic filler with this composition; and acrylic premix obtained by extruding constituent components by a kneading extruder to continuously form the mixture; and a method for producing an acrylic artificial marble in which these acrylic premixes are cured. 16. United States Patent Koyanagi , et al. 6,316,548 November 13, 2001

(Meth)acrylic premix, (meth)acrylic SMC or BMC, and process producing (meth)acrylic artificial marbleAbstract A (meth)acrylic premix comprising a (meth)acrylic resin composition (A) containing a (meth)acrylic monomer (a) and a (meth)acrylic polymer (b), an inorganic filler (B), and a curing agent (C), wherein, the component (a) is a (meth)acrylate having a bicyclo ring, fluorine atom, cyclic ether, cyclohexane ring or tricyclo ring, and the component (C) is a radical polymerization initiator having a 10 hours half-life temperature of 75.degree. C. or more; an acrylic SMC or BMC comprising this (meth)acrylic premix and a thickening agent; and a method for producing (meth)acrylic artificial marble, wherein this (meth)acrylic SMC or BMC is cured with being pressurized and heated at a temperature in the range from 105 to 150.degree. C., are provided. These are useful for producing (meth)acrylic artificial marble having various excellent physical properties such as appearance, dimension stability, hot water resistance, weatherability. 17. United States Patent Koyanagi , et al. 6,265,467 July 24, 2001

Acrylic SMC or BMC, production thereof, method for producing acrylic artificial marble, and thickening agentAbstract An acrylic SMC or BMC, in which when a polymer powder (C) having a bulk density in the range from 0.1 to 0.7 g/ml, an oil absorption of lin-seed oil in the range from 60 to 200 mi/100 g, a degree of swelling by methyl methacrylate is 16-fold or more and a specific surface area in the range from 1 to 100 m.sup.2 /g is added as a thickening agent, hot water resistance is improved by using a polymer powder (C1) containing no surfactant, a polymer powder (C2) containing as a constituent component a reactive surfactant, or thickening speed is controlled by using a non-cross linked polymer powder (C3) having a Mw from 100,000 to 2,500,000, a non-crosslinked polymer powder (C4) having a Ma from 2,500,000 to 5,000,000, a crosslinked polymer powder (C5) and a polymer powder (D) having a specific surface area from 0.01 m.sup.2 /g to 1 m.sup.2 /g; a production method thereof; a method for producing acrylic artificial marble in which components are extruded by a kneading extruder (9) into given shape; and a thickening agent. 18. United States Patent 6,174,954

Amekawa

January 16, 2001

Resin composition, artificial marble obtained by molding composition and production thereofAbstract A resin composition, comprising the components of: (a) 10 to 40% by weight of (i) an unsaturated monomer having at least two double bonds which can effect radical polymerization or (ii) a mixture of said unsaturated monomer and an unsaturated monomer copolymerizable with said unsaturated monomer, (b) 50 to 85% by weight of an inorganic filler, (c) 1 to 20% by weight of a cross-linked resin particle, (d) 0.1 to 20% by weight of a resin having a methyl methacrylate unit, and (e) 0.01 to 5% by weight of a radical polymerization initiator, is provided. The resin composition has excellent handling property, generates little odor, and can be easily molded to obtain artificial marble. 19. United States Patent Yanagase , et al. 6,028,127 February 22, 2000

Artificial marble and method for preparing itAbstract An artificial marble is herein disclosed which comprises a polymer (A) of a radical polymerizable vinyl compound, an inorganic filler (B) having an average particle diameter of 1 .mu.m or more, and a colloidal metal oxide (C) having an average particle diameter of 1 to 100 nm, the metal oxide (C) being uniformly dispersed in the state of substantially primary particles in the polymer (A). The colloidal metal oxide (C) can be uniformly dispersed, whereby a high flame retardancy can be imparted to the artificial marble, and the inorganic components can be filled in a higher ratio without impairing aesthetic properties peculiar to the artificial marble. 20. United States Patent Kim 5,993,920 November 30, 1999

Incombustible artificial marble and a process for preparation thereofAbstract An incombustible artificial marble which is used to produce multiple color patterns which contains, as a multiple layer composite, a layer of activated clay mixed with stone powder and/or cement powder, fine sawdust and/or the heart of kaoliang stalk, a coloring agent, calcium and magnesium salts, an epoxy resin layer; an adhesive layer; a transfer film layer containing multiple color patterns, an ultra-violet curable adhesive layer and a protective film layer. 21.

United States Patent Mukai , et al.

5,837,175 November 17, 1998

Process for producing artificial marble having striped patternAbstract A process for producing artificial marble by curing liquid resins in a molding cell, which comprises a step in which liquid resins each having different color are laminated by injection in the molding cell so that at least two layers are formed, then a comb-like tool is moved in the liquid resins laminated while the blades of the tool are in contact with the bottom of the molding cell to produce a striped pattern formed from at least the liquid resin of a layer which is adjacent a bottom layer and which flows to the bottom of the molding cell, and then the liquid resins are cured to produce artificial marble having a striped pattern 22. United States Patent Sato , et al. 5,403,631 April 4, 1995

Artificial marble sheet, method of manufacturing the same and artificial marble molding productAbstract An artificial marble sheet is formed of a pair of carrier films, an SMC layer and a resin concrete layer which has plasticity but does not contain glass fibers laminated between the carrier films. A method of manufacturing the artificial marble sheet as defined above which includes forming a resin concrete layer which has plasticity but does not contain glass fiber on a first carrier film, forming an SMC layer on a second carrier film and bringing the resin concrete layer and the SMC layer into an intimate contact to each other. Carrier films are removed from the artificial marble sheet and press molding is applied under heating such that the resin concrete layer is located on the side of the surface of the product. 23. United States Patent Harada , et al. 5,356,953 October 18, 1994

Resin composition for artificial marble, bulk molding compound and sheet molding compound using the same, and process for preparing artificial marble using the sameAbstract Disclosed are a resin composition for artificial marble comprising: (I) an unsaturated polyester obtained by using a divalent alcohol containing hydrogenated hisphenol A as an essential component and an .alpha.,.beta.-ethylenic unsaturated dibasic acid; (II) a copolymerizable monomer; (III) an unsaturated alcohol which can be copolymerized with the unsaturated polyester (I) and the copolymerizable monomer (II); and (IV) a low molecular weight styrene-maleic

anhydride copolymer having a molar ratio of styrene to maleic anhydride being 3:1 to 7:1 and a number average molecular weight of less than 5,000, wherein the unsaturated alcohol (III) is used in such an amount that the weight ratio of the unsaturated alcohol (III) to the copolymerizable monomer (II) is 1:99 to 50:50, the weight ratio of the unsaturated polyester (I) to (the copolymerizable monomer (II)+the unsaturated alcohol (III)) is 30:70 to 70:30, and the weight ratio of the styrene-maleic anhydride copolymer (IV) to (the unsaturated polyester (I)+the copolymerizable monomer (II)+the unsaturated alcohol (III)) is 10:90 to 40:60, a bulk molding compound or sheet molding compound using the same, and a process for preparing artificial marble using the same. 24. United States Patent Ohkawa, deceased , et al. 5,324,757 June 28, 1994

Resin-based artificial marble compositionsAbstract A resin-based composition for casting artificial marble has excellent resistance to hot water. The composition includes an unsaturated polyester resin and a gibbsite-type aluminum hydroxide which has been surface-treated with an ethylenically unsaturated silane coupling agent.

25. United States Patent Ikezoe , et al.

5,314,729 May 24, 1994

Artificial marbleAbstract An artificial marble formed by molding a material, in which said material comprises an unsaturated polyester, an unsaturated polymerizable monomer, and a filler. The unsaturated polyester consists essentially of an acid component and an alcohol component, wherein said alcohol component contains at least a glycol selected from a group consisting of 2-methylpropane-1,3-diol, 3methylpentane-1,5-diol, 3-methyl-2-pentene-1,5-diol, 2-isopropylidene-1,3-propanediol, 2isopropyl-1,3-propanediol, and 2-methylene-1,3-propanediol. 26. United States Patent Traverso , et al. 5,280,051 January 18, 1994

Composition for the production of artificial marble or graniteAbstract

Artificial marble or granite having excellent aesthetic properties, patterns and tonalities which cannot be found in natural materials are prepared from a composition containing a polymerizable poly(allyl carbonate) of a polyol and mineral filler, where the mineral filler is a carbonate type in the case of marble, and silicate or silica type in the case of granite, and is in the form of particles of which at least 40% to 100% by weight have a particle size greater than 0.5 mm. The artificial marble and granite produced by the process of the invention require a limited quantity of polymerizable poly(allyl carbonate) binder, have excellent aesthetic properties and high aging resistance, making them suitable for external use. 27. United States Patent Yukawa , et al. 5,212,217 May 18, 1993

Artificial marble from reactive thermoplastic, monomer and anhydrideAbstract This invention is directed to a setting resin composition comprising (A) a radically polymerizable monomer, (B) a thermoplastic resin soluble or dispersible in said monomer (A), (C) an epoxy resin, (D) at least one polyfunctional carboxylic acid compound selected from said group consisting of polyfunctional carboxylic acids and anhydrides thereof, and (E) an inorganic filler and using said components in proportions such that, based on said amount of said radically polymerizable monomer (A) taken as 100 parts by weight, the amount of said thermoplastic resin (B) is in the range of 5 to 75 parts by weight, that of said epoxy resin (C) in the range of 10 to 100 parts by weight, that of said inorganic filler (E) in the range of 100 to 1,000 parts by weight, and that of said polyfunctional carboxylic acid compound (D) in the range of 0.5 to 4.0 equivalent weights per equivalent weight of said epoxy resin (C), wherein an acid anhydride group is assumed to be bifunctional, an artificial marble using the same and a method for the production of an artificial marble. 28. United States Patent Uchida , et al. 5,164,425 November 17, 1992

Artificial marble compositionAbstract A composition for artificial marble comprising (a) 10 to 60% by weight of an allyl-terminated oligomer, (b) 40 to 86% by weight of an inorganic filler and (c) 0 to 30% by weight of a reactive monomer. The composition provides artificial marble having a deep appearance characteristic of marble and having a high strength and high abrasion resistance. 29. United States Patent Hayashi , et al. 5,079,279 January 7, 1992

Reaction curable resin composition and artificial marbleAbstract A reaction curable resin composition comprising a curable component, a polymerization initiator for curing the curable component, an inorganic filler and a phosphoric acid ester of methacrylic or acrylic acid having the formula: ##STR1## wherein R is H or CH.sub.3, and n is 1 or 2, wherein the curable component comprises at least one monomer (A-1) selected from the group consisting of a polyfunctional allylcarbonate, an unsaturated polyester and (meth)acrylate, and/or a precondensate (A-2) obtained by partially polymerizing such monomer (A-1). 30. United States Patent Hayashi , et al. 4,916,172 April 10, 1990

Reaction curable composition and artificial marble

Abstract A reaction curable composition comprising a curable component, a polymerization initiator for curing the curable component and from 30 to 90% by weight, based on the total composition, of inorganic fillers, wherein the curable component is a combination of a polyfunctional allylcarbonate monomer or its precondensate, an unsaturated polyester and a reactive diluent, or a combination of a partially cured product of at least two of such three components and the rest of such three components, if any. 31. United States Patent Kamiya , et al. 4,871,596 October 3, 1989

Artificial marbleAbstract Artificial marble is produced by laminating a plurality of prepreg sheets formed by impregnating a porous substrate with a melamine resin composition which is composed of melamine resin and a modifier. The melamine resin is an unmodified melamine resin or an alcohol-etherified melamine resin in which formaldehyde-to-melamine molar ratio is between 1.2 to 3.0. The modifier is selected from alcohol, glycol, acrylic monomer, acrylic oligomer and vinyl acetate monomer. The artificial marble has a good stability in dimensions and it is suitable to apply the artificial marble to a composite panel or a decorative laminate panel which is free from tearing even after long time use. 32. United States Patent 4,269,798

Ives

May 26, 1981

Method for producing a curable, filled resin composition, e.g., artificial marbleAbstract A filler material and a heated, catalyzed synthetic resin are sequentially introduced into a mixer. The mixer has a conveying section and a mixing section. The resin and filler are introduced into the conveying section, which forces the combined resin and filler material into and through the mixing section. The mixing section kneads and shears the material to uniformly disperse the resin throughout the filler. The resin/filler mixture is then dispensed into a mold for curing. 34. United States Patent Beitelshees , et al. 6,462,103 October 8, 2002

Formation of three dimensional burls in a filled acrylic solid surface materialAbstract A series of three-dimensional burls are formed in a filled acrylic solid surface material by curing two partially mixed casting compositions with defined parameters of viscosity, density and surface tension. 35. United States Patent Diao , et al. 6,476,100 November 5, 2002

Solid surface materials prepared from extrudable acrylic compositesAbstract Solid surface material is prepared from an extrudable composite material comprising a matrix of at least one acrylic resin and a filler dispersed in the matrix, said acrylic resin comprising an acrylic epoxy-ftmctional copolymer as a matrix resin crosslinked with a straight or branched chain aliphatic carboxylic acid or anhydride of such acid. 36. CN101570413 (A) 2009-11-04 Acrylic artificial stone and method for preparing same Abstract of CN101570413 (A)T he invention relates to an acrylic artificial stone with natural marble surface patterns and excellent hot water resistance and a method for preparing the same. The acrylic artificial stone comprises the following components by weight portion: 40 to 70 portions of acrylic-based resin monomer, 10 to 25 portions of thickening agent, 200 to 350 portions of inorganic filler, 0.01 to 2 portions of curing agent, and 0 to 30 portions of unsaturated resin, wherein the thickening agent is a hot melt mixture of

acrylic polymers and the acrylic-based resin monomer, and the molecular weight of the acrylic polymers is between 100,000 and 400,000. The method for preparing the acrylic artificial stone comprises the following steps of: putting the unsaturated resin, the acrylic-based resin monomer, the thickening agent, the inorganic filler and the curing agent in a kneader according to a formula to obtain an acrylic molding compound; and filling the molding compound in a mold and curing the molding compound at a temperature of between 100 and 145 DEG C and under a pressure of between 10 and 20MPa to prepare the acrylic artificial stone. The prepared acrylic artificial stone has excellent appearance and performance.

37. JP2010018450 (A) 2010-01-28 METHOD FOR PRODUCING ARTIFICIAL MARBLE HAVING EXCELLENT DESIGNPROBLEM TO BE SOLVED: To provide a method which can produce an artificial marble having excellent design and a fine and graceful appearance, particularly, an appearance of a Japanese paper tone which has not been seen in the conventional artificial marble while alleviating restrictions on the thickness of a flake on which limitation upon production has been large. ; SOLUTION: Disclosed is a method for producing an artificial marble where a polymerizable component (A) of 20 to 75 mass % essentially consisting of methyl methacrylate, an inorganic filler (B) of 20 to 75 mass%, and a polymerized and cured flake (C) of 0.01 to 5 mass% composed of a cured product obtained from a polymerizable component (C-a) of 25 to 75 mass% in which the composing ratio between methacrylic acid ester other than methyl methacrylate or acrylic ester and methyl methacrylate is 55/45 to 100/0 and an inorganic filler (C-b) of 25 to 75 mass% and having a thickness of 0.001 to 2 mm, an aspect ratio of 1:3 or more and the maximum length of