GB2333297A - Acrylic resin composition for moulding artificial marble articles - Google Patents
Acrylic resin composition for moulding artificial marble articles Download PDFInfo
- Publication number
- GB2333297A GB2333297A GB9908802A GB9908802A GB2333297A GB 2333297 A GB2333297 A GB 2333297A GB 9908802 A GB9908802 A GB 9908802A GB 9908802 A GB9908802 A GB 9908802A GB 2333297 A GB2333297 A GB 2333297A
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- Prior art keywords
- acrylic resin
- resin compound
- artificial marble
- weight
- molding
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/01—Hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/06—Acrylates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/54—Substitutes for natural stone, artistic materials or the like
- C04B2111/542—Artificial natural stone
- C04B2111/545—Artificial marble
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
An acrylic resin composition for including an artificial marble article having a curved portion contains 0.1 - 2.5 parts of paraffin by weight per 100 parts of acrylic resin. The composition is press moulded e.g. to form a washbowl in a counter top.
Description
Acrylic Resin Compound for Artificial marble and
Method of Molding Acrylic Artificial Marble Article
The present invention relates to an acrylic resin compound capable of providing artificial marble of which surface characteristics are excellent and thus having improved appearance, and a method of molding an acrylic artificial marble article by press molding.
To manufacture artificial marble from an acrylic resin compound, casting is mainly employed in the present state of the art. However, press molding offers following advantages over casting. Thus, the deployment of technology in manufacturing artificial marble by press molding is anticipated.
I. The press molding can offer shortened molding cycle for mass production.
That is, the press molding can be conducted in short molding cycle of 50% through 20% as compared to the casting, in case of the mass production of more than 20 tons per month.
2. The press molding is conducted at higher temperatures and pressures as compared to the casting, thereby providing higher hardness in molded articles and thus providing more stable hard articles.
As mentioned above, the press molding can offer the faster molding cycle than the casting so that it is better for the mass production. In addition, the articles are cured at high temperatures and high pressures, thereby stabilizing the qualities of the articles and providing good working conditions. However, the finish of the molded
surface of an article molded by the press molding may stonily depend on the
configuration of the mold Therefore, depending on the configuration of the molt i.e.
the configuration of the product, the press molding is likely to provide an article of
which surface characteristics is not good.
For example, to mold a counter top With washbowl 1 as shown in Fig. I trom an acrylic resin compound by the press molding, a material (BMC compound) 2 is generally disposed at a position shown by broken lines rl Fig. I and then rldec. by the
press molding. In this case, the material 2 flow in such two ways as shown by arrows
A, B so that the heads of flows meet each other at a position C where the molded article may have a disorderly surface.
Though the detailed case of the molding defect in the meeting position C has not been apparent, it is considered that the cause may be vaporization of monomer molecules at the heads of flows of the material, orientation of fibers in the compound due to flowing, deceasing in the uniformity of the compound due to flowing, poor in fluidity of the material at the molding temperature, and so on.
The article having such a disorderly surface has a poor appea..ce, thereby destroy the high-yade atmosphere, the advantage of the artificial marble. In case of notable case, the articles may not be for sale.
It is an aim of the present invention to provide an acrylic resin compound for artificial marble capable of providing artificial marble, of which surface characteristics are excellent and thus having improved appearance, by press molding regardless of the configuration of a mold, and a method of molding an acrylic artificial marble article from the compound by press molding.
It is another aim of the present invention to provide an acrylic resin. compound for artificial marble capable of providing artificial marble, of which surface characteristics are excellent and thus having improved appearance, by press molding, and a method of molding an acrylic artificial marble article with curves by press molding.
An acrylic resin compound for artificial marble according to a first aspect of the present invention is used for manufacturing an artificial marble by press molding and is characterized by containing one kind or plural kinds of additives selected from a group including silicone oil, surface-active agent, coupling agent, reactive monomer with high boiling point, and reactive oligomer with high boiling point
A method of molding an acrylic artificial marble article according to a second
aspect of the present invention is characterized in that the aforementioned acrylic resin compound for artificial marble is molded by press molding.
That is, close examination of the inventors for preventing the occurrence of a disorderly surface at the meeting position where heads of flows of the material meet each other in the conventional press molding indicated that the molding defect can be prevented by adding one kind or plural kinds of additives selected from a group including silicone oil, surface-active agent, coupling agent, reactive monomer with high boiling point, and reactive oligomer with high boiling point into the acrylic resin compound, wherein each additive has
(a) a boiling point higher than the molding temperature,
(b) compatibility or homogeneous dispersion against vinyl monomer mainly consisting of methyl methacrylate composing the acrylic resin, and
(c) low surface tension.
The effects of the present invention due to such additives may be as follows.
The high boiling point of the additive prevents the vaporization of monomer molecules from the material. The low surface tension of the additive improves the fluidity of the materials against the cavity face because the additive oozes out of the surface of the flowing material. It also improves the drape between fibers and filler and matrix resin, thereby preventing the failure of evenness of the material and thus preventing the defect at the meeting position of the heads of flows.
An acrylic resin compound according to a third aspect of the present invention is used for molding an acrylic artificial marble article with curves and is characterized by containing 0.1 - 2.5 parts of paraffin by weight per 100 parts of acrylic resin.
A method of molding an acrylic artificial marble article according to a fourth
aspect of the present invention is characterized in that an acrylic artificial marble article with curves is molded from the aforementioned acrylic resin compound by press molding.
That is, close examination of the inventors for preventing the occurrence of a disorderly surface at the meeting position where heads of flows of the material meet each other in the conventional press molding indicated that the molding defect can be prevented by adding a given amount of paraffm into the acrylic resin compound.
The effects of the present invention due to the paraffin may be as follows.
Since the paraffin has high boiling point, the vaporization of monomer
molecules from the material can be prevented. The paraffin oozes out of surface of the flowing material so as to function as lubricant, thereby improving the fluidity of the
materials against the cavity face and preventing the oxygen hardening.
Preferred embodiments of the present invention will now be described hereinbelow by way of example only with reference to the accompanying drawings, in which:
Fig. 1 is a perspective view showing a counter top with washbowl manufactured in accordance with the preferred embodiments of the present invention and comparative examples.
Hereinafter, the present invention will be described in detail.
First, the description will be made as regard to any acrylic resin compound for artificial marble according to the first embodiment of the present invention and a method of molding acrylic artificial marble article made of the compound according to the second embodiment of the present invention.
According to the first and second embodiments, to prevent the molding defect in the meeting position where heads of flows of the material meet each other during the process of the press molding, one kind or plural kinds of additives selected from a group including silicone oil, surface-active agent, coupling agent, reactive monomer with high boiling point, and reactive oligomer with high boiling point are added in the acrylic resin compound.
Little amounts of additives to be added may not produce a sufficient effect, while large amounts of additives may destroy the characteristics, the advantage of acrylic resin compound for artificial marble, since the amounts of the other compositions are relatively reduced.
In case of adding silicone oil, the amount of the silicone oil to be added is preferably from 0.1 % to 10% by weight for the acrylic resin. In case of adding surface-active agent, the amount of the surface-active agent to be added is preferably
from 0.1 % to 5 % by weight for the acrylic resin. In case of adding coupling agent, the amount to be added is preferably from O. l % to 5 % by weight for the acrylic resin.
In case of adding reactive monomer with high boiling point, the amount to be added is preferably from 1 % to 30 % by weight for the acrylic resin. In- case of adding reactive oligomer with high boiling point, the amount to be added is preferably from 1 % to
30 % by weight for the acrylic resign.
It should be noted that the surface-active agent may be N-methylpyrrolidone soap, and the coupling agent m y be an agent having functional lipophilic group and
three hydrophilic groups, such as vinyl-silane or vinyl-trimetho:ry-silane.
It should be also noted that the reactive monomer with high boiling point may
have the boiling point higher than the molding temperature, i.e. more than 140"C.
Therefore, for exam.plew polymerized monomer, such as styrene or caprolactam, may be employed as the reactive monomer with high boiling point Further, the reactive oligomer with high boiling point may have the boiling point higher than the molding temperature, i.e. more than 140'C. Therefore, for example, acrylic oligomer, such as polysilox; e containing acrylic group, or oligomer of multifunctional acrylate may be employed as the reactive oligomer wit high boiling point
The acrylic resin compound for artificial marble according to the first embodiment may be the same composition as the conventional acrylic resin compound but the additive as mentioned above to be added The acrylic resin compound may be the sum of acrylic resin compound, generally consisting of the following composition, plus the aforementioned additive.
The composition of the acrvlic resin compound besides The aforementioned additive Acrylic resin: 100
Filler: lCO-350 Reinforcing fiber : 0-30
Curing agent: 0.05 - 3.0
Internal mold release agent: 0-50
It should be noted that the filler may be calcium carbonate, barium sulfate, talc, silica, alumina, aluminum hydroxide, or glass ball. Particularly, aluminum hydroxide having excellent wor.kability may be preferably employed for artificial marble to manufac:trre a counter top or the like, while silica having good water resisting properly
and surface hardness may be preferably employed for artificial marble to manufac:ure a
bathtub or the like. The reinforcing fioer may be glass fiber, carbon fiber, or organic
fiber or the like. The c'ng agent may be one belonging to peroxy ester group, such
as t-butylperoxy-2-ethylhexanoate and the internal mold release agent may be z;nc stearate or calcium stearate.
Besides the composition as mentioned above, the acrylic resin compound for artificial marble according to the first embodiment may contain thickening agent such as magnesium oxide, polymerization inhibitor such as methyl tertiary butyl hydroquinone, ultraviolet absorber (IJV absorber), anti-foaming agent, or/and finishing agent
It should be noted that the acrylic resin may be acrylic syrup containing: vinyl monomer mainly consisting of methyl methacrylate (NINIA) : 40 -70% by weight, crosslinking agent: 0 - 10 % by weight, and methyl methacrylate polymer having average molecular weight of 10,000 - 150,000 : 30 - 60 % by weight, wherein the crosslinking agent is preferably multifunctional acrylate such as dimeth2crylate-1,6- hexanediol.
As mentioned above, the vinyl monomer mainly consists of methyl methacrylate. The ratio of the methyl methacrylate in the vinyl monomer is equal to or more than 50 % by weight, preferably more than 75 % by weight, because methyl methacrylate of less than 50 % of weight of the vinyl monomer reduces the weatherability and the stain resistance of the resultant artificial marble.
The vinyl monomer which can be used in combination with the methyl methacrylate may be methacrylate ester besides the methyl methacrylate, acrylic ester, or aromatic vinyl monomer. The methyl methacrylate polymer > SIA polymer) may contain carboxyl group.
The acrylic resin compound for artificial marble according to the first embodiment is effectively available particularly for molding an article having an intricate configuration which facilitates occurrence of a disorderly surface at the meeting position where heads of flows of the material meet each other during the process of the press
molding, such as a counter top with washbowl, a counter top with sink of a kitchen unit, or the like.
An artificial marble article can be manufactured from the acrylic resin compound of the first embodiment as mentioned above by press-molding the acrylic resin compound at the molding temperature of 105 - 140 C with the temperature difference of
10 - 20 C between the surface and the back of the article, and at the molding pressure of 3 - 10 MPa in the conventional method.
With the acrylic resin compound for artificial marble of the first embodiment and
the method of molding acrylic artificial marble article made of the compound according to the second embodiment of the present invention, an artificial marble of which surface characteristics are excellent and thus having improved apperance can be obtained by press molding regardless of the configuration of a mold
The description will be made as regard to acrylic resin compound for artificial marble according to the third embodiment of the present invention and a method of molding acrylic artificial marble article made of the compound according to the fourth embodiment of the present invention.
According to the third and fourth embodiments, to prevent the molding defect in the meeting position where heads of flows of the material meet each other during the process of the press molding, paraffin is added in the acrylic resin compound.
When the amount of the paraffin is less than 0.05 parts by weight per 100 parts of acrylic resin, there is no prospect of a sufficient effect, while the paraffin of more than 2.5 parts by weight may destroy the characteristics in strength and the like, the advantage of acrylic resin compound for artificial marble, since the amounts of the other composition are relatively reduced.
The paraffin is preferably paraffin wax with melting point of 40 - 60 C since
the appearance of the resultant product is good.
The acrylic resin compound for artificial marble according to the third embodiment may be the same composition as the conventional acrylic resin compound but the paraffin as mentioned above to be added. Generally, the acrylic resin compound may
be the sum of the acrylic resin compound, consisting of the same as stated in the
description of the acrylic resin compound for artificial marble according to the first embodiment, plus the paraffin between 0.1 and 2.5 parts by weight.
In the same manner of the first embodiment, besides the aforementioned composition, the acrylic resin compound for artificial marble according to the third embodiment may contain thickening agent such as magnesium oxide, polymerization inhibitor such as methyl-t-butyl hydroquinone, UV absorber, anti-foaming agent, or/and finishing agent.
It should be noted that the acrylic resin may be acrylic syrup containing: vinyl monomer mainly consisting of methyl methacrylate (NfN1A) : equal to or more than 50 % by weight, crosslinking agent : 0 - 10 % by weight, and methyl methacrylate polymer having average molecular weight of 10,000 - 150,000 : equal to or less than 50 % by weight, wherein the crosslinking agent is preferably muItifunctional acrylate such as dimethacrylate- 1 ,dhexanediol.
As mentioned above, the vinyl monomer mainly consists of methyl methacrylate. The ratio of the methyl methacrylate in the vinyl monomer is equal to or more than 50 % by weight, preferably more than 75 % by weight, because methyl methacrylate of less than 50 % of weight of the vinyl monomer reduces the weatherability and the stain resistance of the resultant artificial marble.
The vinyl monomer which can be used in combination with the methyl methacrylate may be methacrylate ester besides the methyl methacrylate, acrylic ester, or aromatic vinyl monomer. The methyl methacrylate polymer (MAMA polymer) may contain carboxyl group.
The acrylic resin compound for artificial marble according to the third embodiment is effectively available particularly for molding an article having an intricate deep drawing configuration which facilitates occurrence of a disorderly surface at the meeting position where heads of flows of the material meet each other during the process of the press molding, such as a counter top with washbowl, a counter top with sink of a kitchen unit, or the like.
An artificial marble article with curves can be manufactured from the acrylic resin compound of the third embodiment as mentioned above by press-molding the acrylic resin compound with a mold for press molding at the molding temperature of 105 l40C with the temFe.-atre difference of 10 - 20 C between the surface and the back of the article, and at the molding pressure of 3 - 10 NfP With the acrylic resin compound for artificial marble of the third embodiment and the method of molding acrylic artificial marble article made of the compound according to the fourth embodiment of the present invention, an artificial marble with curves of which surface charac+eristics are excellent and thus having improved appearance can be obtained by press molding.
Hereinafter, the present invention will now be described in further detail with
reference to preferred embodiments and comparative examples.
Embodiments 1 - 5, comparative Example 1
A counter top with washbowl 1 as shown in Fig. I was manufactured with each acrylic resin compound as prepared stated in Table 1 under the molding condition as follows. It should be noted that the material 2 is di'posed at a portion shown by broken lines in Fig. I. The compositions of the acrylic resin are as follows.
Molding Condition
Molding Temperature Temperarure of the surface of the mold: 130 C Temperature of the back of the mold 120 C Molding Pressure 5 MPa Molding Period 8 minuets
Composition of the Acrvlic Resin (% bv weight MMA monomer: 60 Crosslinking Agent (multirunctional acrylate) 1 MMA polymer (the average molecular weight 120,000):39 Table 1]
Embodiments C. Ex.
Examples 1 2 3 4 5 1 Acrylic Resin 100 100 100 100 lOO 100 Aluminum Hydroxide 200 200 200 T 200 200 200 Glass Fiber lQ 10 10 10 1O 10 P Zine Stearate 1 1 1 1 1 1 ~ Ciimig Agent 1 1 1 1 1 1 s: Curing Agent 1 1 1 1 1 1 Silicone Oil 2 0 0 0 0 0 Caprolactam 0 5 0 0 0 0 C Vinyl-trimethoxy-silane O 0 0 2 0 0 z Po ysi oxane wid 0 0 0 0 5 0 acrylic group C. Ex = Comparative Example, Curing Agent = Peroxide
As a result, there are appearance defect due to the disorderly surface at the meeting position C in Fig. 1 in the comparative example 1. On the other hand, there are no disorderly surface in either the embodiment l containing the silicone oil, the embodiment 2 containing the caprolactarn, the embodiment 3 containing the Nmethylpyrrolidone, the embodiment 4 containing the vinyl-trimethoxy-silane, or the embodiment 5 containing Polysiloxane with acrylic group, thereby making the resultant articles to have good appearance.
Embodiments 6 - 10, Comparative Examples 2-4 The counter top with washbowl l as shown in Fig. 1 was manufactured with each acrylic resin compound as preprred stated in Table 2 under the molding condition as follows. It should be noted that the material 2 is disposed at the position shown by broken lines in Fig. 1. The compositions of the acrylic resin are as follows.
Molding Condition
Molding Temperature Temperature of the surface of the mold: 1300C Temperature of the back of the mold: 1200C Molding Pressure 5 MPa Molding Period 8 minutes
Composition of the Acrvlic Resin (%bv weight MMA monomer: 60 Crosslinl ng Agent (multifunctional acrylate):1 PINTA polymer (the average molecular weight 100,000): 39
The appearance of each resultant article was observed and the strength (Falling
Ball Impact Strength: Hmax, the maximum of height H causing no crack when falling a ball of 200g from an upper position Hmm to the article) was also observed. Table 2 shows the results of the observation.
As apparent from Table 2, an article having improved appearance and high strength can be manufactured by adding paraffin of 0. l - 2.5 parts by weight per 100 parts of acrylic resin.
[Table 2]
C. Ex. Embodiments C.Ex Examples 2 1 3 6 7 8 9 1 10 4 Acrylic Resin 100 100 100 100 100 100 100 100 - Filler 150 150 150 150 150 150 150 150 Reinforcing fiber 10 10 10 10 ~~ 10 10 10 10 internal Mod ReleaseAgent 5 5 5 5 5 5 5 5 Curing Agent 1.2 1.2 j 1.2 1.2 1.2 1.2 1.2 1.2 Polymerizationlnltibitor O. 0.1 1 0.1 0.1 0.1 0.1 O 1 O. 1 Coupling Agent 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Thickening Agent 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 Paraffin (Melting point: zi'C) 0 0.05 0.1 0.5 1.0 2.0 2.5 3.0 Appearance * NAG 1 NG1 Good Good Good Good Good NG2 Evaluation O 0 0 0 0 0 O x Strength Hmax 100 100 100 100 100 100 100 90 C. Ex = Comparative Example, Filler = Aluminum Hydroxide, Reinforcing Fiber = Glass Fiber:
Fiber length of 15 mm, Internal Mold Release Agent = Zinc S tearate, Curing Agent = Peroxide,
Polymerization inhibitor = Methyl-t-butyl hydroquinone, Thickening Agent = Magnesium Oxide * NG1 : disorder appeared at end.
NG2: unevenness of gloss appeared on surface.
Good: Excellent. Neither disorderly nor unevenness appeared
Embodiments 11 - 20, Comparative Examples 5 -10
These are molded in the same manner as the embodiments 6 - 10 and the comparative examples 2-4 but paraffin having melting point of 43 C or 69'C. Then the appearance and the strength were observed. Tables 3, 4 show the results.
As compared with the Tables 2 through 4, it was found that the paraffin having melting point between 40 C and 60'C was preferable, and particularly among the three kinds of employed paraffin, the paraffin having melting point of 53 C was the best. fable 3]
Melting point of Paraffin : 69 C
C. Ex. Embodiments C.Ex Examples 5 6 11 12 13 14 15 7 Parts of Paraffin by weight 0 0.05 0.1 0.5 1.0 2.0 2.5 3.0 Appearance* NG1 NG1 Good Good Good Good Good NG2 Evaluation O 0 0 0 O 0 O x Strength Hmax 100 100 100 100 100 100 100 90 * NG1 : disorder appeared at end.
NG2: unevenness of gloss appeared on surface.
Good: Excellent. Neither disorderly nor unevenness appeared cutable 4]
Melting point of Paraffin : 43 C
C. Ex. Embodiments C.Ex Examples 8 9 16 17 18 19 20 10 Parts of Paraffin by weight 0 0.05 0.1 0.5 1.0 2.0 2.5 3.0 Appearance * NG 1 NG 1 Good Good Good Good Good NG2 Evaluation # #
Claims (15)
1. An acrylic resin compound for molding an acrylic artificial marble article having a curved portion, wherein the acrylic resin compound contains 0.1 - 2.5 parts of paraffin by weight per 100 parts of acrylic resin.
2. An acrylic resin compound as claimed in claim 1, wherein said paraffin has melting point of 40 - 60 "C.
3. An acrylic resin compound as claimed in claim 1, wherein said compound comprises 100 parts of acrylic resin by weight, 100 - 350 parts of filler by weight, 0 - 30 parts of reinforcing fiber by weight, 0.05 - 3.0 parts of curing agent by weight, 0 - 50 parts of internal mold release agent by weight, and 0.1 - 2.5 parts of paraffin by weight.
4. An acrylic resin compound as claimed in claim 3, wherein the filler is at least one of aluminium hydroxide and silica, and the reinforcing fiber is glass fiber.
5. An acrylic resin compound as claimed in claim 3, wherein the acrylic resin is acrylic syrup comprising: not less than 50% vinyl monomer mainly consisting of methyl methacrylate by weight, 0 - 10% crosslinking agent by weight, and not more than 50% methyl methacrylate polymer, having average molecular weight of 10,000 - 150,000, by weight.
6. An acrylic resin compound as claimed in claim 5, wherein the ratio of methyl methacrylate in the vinyl monomer mainly consisting of methyl methacrylate is equal to or more than 75% by weight.
7. An acrylic resin compound as claimed in claim 5, wherein the crosslinking agent is multifunctional acrylate.
8. An acrylic resin compound as claimed in claim 3 wherein the filler is glass.
9. An acrylic resin compound as claimed in claim S wherein the glass is glass balls.
10. A method of molding an acrylic artificial marble article from an acrylic resin compound for artificial marble by press molding, wherein the acrylic resin compound contains 0.1 - 2.5 parts of paraffin by weight per 100 parts of acrylic resin.
11. A method of molding an acrylic artificial marble article as claimed in claim 10, wherein the press molding is conducted at the molding temperature of 105 - 140 "C with the temperature difference of 10 - 20 "C between the surface and the back of the article, and at the molding pressure of 3 - 10 MPa.
12. An acrylic resin compound for manufacturing artificial marble by press molding substantially as hereinbefore described with reference to the accompanying drawing.
13. An acrylic resin compound for manufacturing artificial marble by press molding substantially as hereinbefore described with reference to any of Embodiments 6 to 20.
14. A method of molding an acrylic artificial marble article from an acrylic resin compound for artificial marble by press molding substantially as hereinbefore described with reference to the accompanying drawing.
15. A method of molding an acrylic artificial marble article from an acrylic resin compound for artificial marble by press molding substantially as hereinbefore described with reference to any of Embodiments 6 to 20.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28734995A JPH09124883A (en) | 1995-11-06 | 1995-11-06 | Acrylic resin composition for artificial marble |
| JP5310696A JPH09239756A (en) | 1996-03-11 | 1996-03-11 | Molding of acrylic artificial marble product |
| GB9620787A GB2306964B (en) | 1995-11-06 | 1996-10-04 | Acrylic resin compound for artificial marble and method of molding acrylic artificial marble article |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9908802D0 GB9908802D0 (en) | 1999-06-09 |
| GB2333297A true GB2333297A (en) | 1999-07-21 |
| GB2333297B GB2333297B (en) | 1999-12-29 |
Family
ID=27268508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9908802A Expired - Fee Related GB2333297B (en) | 1995-11-06 | 1996-10-04 | Acrylic resin compound for artificial marble and method of moulding acrylic artificial marble article |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2333297B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1454581A2 (en) * | 2003-03-05 | 2004-09-08 | Elleci S.p.A. | Thermosetting composite material particularly for manufacturing sanitary articles and kitchen sinks |
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|---|---|---|---|---|
| GB975587A (en) * | 1961-10-06 | 1964-11-18 | Chem Fab Grunau G M B H | A composition for covering or filling cavities and sealing joints |
| GB1037904A (en) * | 1964-05-01 | 1966-08-03 | Du Pont | Polymerizable solutions of methyl methacrylate polymers in methyl methacrylate |
| EP0318325A2 (en) * | 1987-11-26 | 1989-05-31 | Nippon Shokubai Co., Ltd. | Resin composition for artificial marble |
| JPH06228403A (en) * | 1993-02-02 | 1994-08-16 | Mitsubishi Rayon Co Ltd | Methacrylic resin composition |
-
1996
- 1996-10-04 GB GB9908802A patent/GB2333297B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB975587A (en) * | 1961-10-06 | 1964-11-18 | Chem Fab Grunau G M B H | A composition for covering or filling cavities and sealing joints |
| GB1037904A (en) * | 1964-05-01 | 1966-08-03 | Du Pont | Polymerizable solutions of methyl methacrylate polymers in methyl methacrylate |
| EP0318325A2 (en) * | 1987-11-26 | 1989-05-31 | Nippon Shokubai Co., Ltd. | Resin composition for artificial marble |
| JPH06228403A (en) * | 1993-02-02 | 1994-08-16 | Mitsubishi Rayon Co Ltd | Methacrylic resin composition |
Non-Patent Citations (1)
| Title |
|---|
| WPI Abstract Accession No. 94-299944[37] & JP 060228403 A * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1454581A2 (en) * | 2003-03-05 | 2004-09-08 | Elleci S.p.A. | Thermosetting composite material particularly for manufacturing sanitary articles and kitchen sinks |
| EP1454581A3 (en) * | 2003-03-05 | 2004-10-20 | Elleci S.p.A. | Thermosetting composite material particularly for manufacturing sanitary articles and kitchen sinks |
| US7557155B2 (en) | 2003-03-05 | 2009-07-07 | Elleci S.P.A. | Thermosetting composite material particularly for manufacturing sanitary articles and kitchen sinks |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2333297B (en) | 1999-12-29 |
| GB9908802D0 (en) | 1999-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20021004 |