JP2009173864A - Acrylic resin molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an acrylic resin molding having improved impact resistance and having the weather resistance improved without impairing the external appearance. <P>SOLUTION: The acrylic resin molding is produced from an acrylic resin molding material comprising 100 parts mass rubber-added acrylic resin, 0.1-1.0 part mass ultraviolet absorbent, 0-0.5 parts mass high molecular weight hindered amine light stabilizer and 0.1-1.0 part mass low molecular weight hindered amine light stabilizer. Since this acrylic resin molding comprises rubber, the impact resistance thereof can be improved. Since this acrylic resin molding comprises the ultraviolet absorbent, the high molecular weight hindered amine light stabilizer and the low molecular weight hindered amine light stabilizer in the respective amounts, they do not bleed to the surface thereof to impaire the external appearance, and the weather resistance can be improved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an acrylic resin molded body used as an exterior member or the like around a house.

  Since a resin molded body used as an exterior member around a house such as a rain gutter is required to have high weather resistance, it is produced by molding a resin composition containing an ultraviolet absorber or the like. In particular, in resin molded products that require long-term use, the surface is coated with an inorganic paint or fluorine-based paint to withstand long-term use. It is disadvantageous in terms of cost.

  Therefore, molding of the above resin molded body is performed using an acrylic resin having excellent weather resistance among the resins.

  Here, since the acrylic resin lacks elasticity and has a problem in impact resistance, rubber is added to increase the elasticity and improve the impact resistance. However, when rubber is added to the acrylic resin, the weather resistance decreases, so the amount of rubber added cannot be increased, and the impact resistance and weather resistance are in a trade-off relationship. In particular, when an acrylic resin to which rubber is added is used, the weather resistance tends to be lowered by absorbing water from the surface of the resin molded body.

For this reason, in order to ensure the weather resistance while improving the impact resistance by the addition of rubber, an ultraviolet absorber and a light stabilizer are further blended in the acrylic resin. However, if a large amount of UV absorber or light stabilizer is added to ensure weather resistance, the UV absorber or light stabilizer may bleed on the surface of the resin molded body, which may impair the appearance of the resin molded body. There was a problem.
JP 2006-305936 A JP 2007-9669 A

  The present invention has been made in view of the above points, and an object thereof is to provide an acrylic resin molded body that can improve impact resistance and can improve weather resistance without impairing appearance. To do.

  The acrylic resin molded product according to the present invention has an ultraviolet absorber of 0.1 to 1.0 part by mass and a high molecular weight type hindered amine light stabilizer of 0 to 0 with respect to 100 parts by mass of an acrylic resin to which rubber is added. An acrylic resin molding material containing 0.1 part by mass and 0.5 part by mass of a low molecular weight type hindered amine light stabilizer, respectively, is molded.

  According to the present invention, impact resistance can be improved by adding rubber, and an ultraviolet absorber and a high molecular weight type or low molecular weight type hindered amine light stabilizer are contained in the above-mentioned blending amounts. Thus, the weather resistance can be improved without causing the ultraviolet absorber or the light stabilizer to bleed on the surface and impair the appearance.

  In the present invention, the rubber is characterized in that at least a part of the surface is coated with a silicon compound.

  According to this invention, it is possible to suppress water absorption from the surface of the acrylic resin molded body, and it is possible to suppress deterioration due to water and prevent deterioration of weather resistance.

  In the present invention, the above rubber is added in an amount of 10 to 60 parts by mass with respect to a total of 100 masses of the acrylic resin and the rubber.

  According to this invention, the impact resistance can be improved without impairing the weather resistance and moldability by adding rubber.

  In the present invention, the acrylic resin molding material contains a colorant.

  According to this invention, the weather resistance can be further improved by the light blocking property by the colorant. Especially when the acrylic resin molding material is integrally formed on the surface of the core and coated, the colorant can block light from passing through the molding layer of the acrylic resin molding material and prevent the core from light deterioration. It is something that can be done.

  In the present invention, when using at least a bright material as the colorant, the bright material is 1 to 9 parts by weight with respect to 100 parts by weight of the acrylic resin to which rubber is added, and the colorant other than the bright material is 100 parts by weight of the bright material. It is characterized in that 0 to 50 parts by mass are added with respect to the amount.

  According to this invention, the design of a metallic feeling can be expressed in a molded object by using a luster material.

  Further, the present invention is characterized in that the above-mentioned acrylic resin molding material is formed by extrusion integral molding or injection integral molding on the surface of a core formed of at least one of a metal and a thermoplastic resin.

  According to the present invention, an acrylic resin molded body having improved impact resistance and improved weather resistance without impairing the appearance can be produced by extrusion integral molding or injection integral molding.

  According to the present invention, impact resistance can be improved by adding rubber, and an ultraviolet absorber and a high molecular weight type or low molecular weight type hindered amine light stabilizer are contained in the above-mentioned blending amounts. Thus, the weather resistance can be improved without causing the ultraviolet absorber or the light stabilizer to bleed on the surface and impair the appearance.

  Hereinafter, the best mode for carrying out the present invention will be described.

  The acrylic resin molded body according to the present invention can be obtained by molding an acrylic resin molding material containing an acrylic resin as a main component. Molding can be performed by any method such as extrusion molding or injection molding.

  In the acrylic resin molding material used in the present invention, the molecular weight of the acrylic resin is not particularly limited, but the melt flow rate (MFR: measurement conditions 230 ° C., 37.3 N) is in the range of 1 to 35 g / 10 min. Are preferably used. Examples of such commercially available acrylic resins include “LG” and “LG2” manufactured by Sumitomo Chemical Co., Ltd., “MF” and “VH5” manufactured by Mitsubishi Rayon Co., Ltd., “GF” and “manufactured by Kuraray Co., Ltd. EH "etc.

  In the present invention, rubber is added to this acrylic resin. The rubber is not particularly limited, but butadiene rubber, butyl rubber, acrylic rubber, silicon rubber and the like can be used.

  The amount of rubber added is not particularly limited, but is preferably in the range of 10 to 60 parts by mass with respect to a total of 100 masses of the acrylic resin and rubber. By adding rubber, the low elasticity of the acrylic resin can be compensated for and the impact resistance can be enhanced, and the impact resistance of the acrylic resin molded body can be improved. If the addition amount of the rubber is less than 10 parts by mass, there is a possibility that such an effect of improving the impact resistance due to the addition of the rubber may not be sufficiently obtained. Conversely, if the addition amount of the rubber exceeds 60 parts by mass, If the amount is excessive, the weather resistance of the acrylic resin molded article may be lowered, and the moldability may be deteriorated. Therefore, by setting the addition amount of rubber within the above range, it is possible to improve the impact resistance of the acrylic resin molded article without impairing the weather resistance.

  Moreover, as said rubber, it is desirable to use the thing by which the silicon type compound was coat | covered to the one part or the whole surface. As this silicon compound, a silicon resin, a silane coupling agent, or the like can be used. When the surface of rubber is coated with a silicone resin, the silicone resin is preferably grafted and bonded to rubber molecules. Thus, by using the rubber | gum coat | covered with the silicon type compound, the water resistance of rubber | gum can improve and deterioration can be suppressed and the fall of the weather resistance of an acrylic resin molding can be prevented.

  In the acrylic resin molding material used in the present invention, an ultraviolet absorber and a hindered amine light stabilizer are further blended. In this way, by combining the ultraviolet absorber and the hindered amine light stabilizer in combination, the weather resistance of the acrylic resin molded article can be improved, and the deterioration of the weather resistance due to the addition of rubber is compensated. It is something that can be done.

  Although it does not specifically limit as a ultraviolet absorber, A benzotriazole type, a benzophenone type, a salicylate type, and a triazine type ultraviolet absorber can be used.

  For example, as a benzotriazole ultraviolet absorber, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- (2′-hydroxy-5′-tert-butylphenyl) benzotriazole, 2- (2 '-Hydroxy-3', 5'-di-tert-butylphenyl) benzotriazole, 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole, 2- (2-hydroxy-5-tert-octylphenyl) ) Benzotriazole, 2- (2-hydroxy-3,5-di-tert-octylphenyl) benzotriazole, 2- [2′-hydroxy-3 ′, 5′-bis (α, α′-dimethylbenzyl) phenyl Benzotriazole), methyl-3- [3-tert-butyl-5- (2H-benzotria) Condensation product of sol-2-yl) -4-hydroxyphenyl] propionate and polyethylene glycol (molecular weight 300) (“TINUVIN 1130” manufactured by Ciba Specialty Chemicals Co., Ltd.), isooctyl-3- [3- (2H-benzo Triazol-2-yl) -5-tert-butyl-4-hydroxyphenyl] propionate ("TINUVIN 384" manufactured by Ciba Specialty Chemicals Co., Ltd.), 2- (3-dodecyl-5-methyl-2-hydroxyphenyl) Benzotriazole (“TINUVIN571” manufactured by Ciba Specialty Chemicals Co., Ltd.), 2- (2′-hydroxy-3′-tert-butyl-5′-methylphenyl) -5-chlorobenzotriazole, 2- (2 ′ -Hydroxy-3 ', 5'-di-ter -Amylphenyl) benzotriazole, 2- (2'-hydroxy-4'-octoxyphenyl) benzotriazole, 2- [2'-hydroxy-3 '-(3 ", 4", 5 ", 6 '' -Tetrahydrophthalimidomethyl) -5'-methylphenyl] benzotriazole, 2,2-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2H-benzotriazol-2-yl ) Phenol], 2- (2H-benzotriazol-2-yl) -4,6-bis (1-methyl-1-phenylethyl) phenol (“TINUVIN900” manufactured by Ciba Specialty Chemicals) can do.

  Examples of the benzophenone ultraviolet absorber include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2-hydroxy-4-n-octoxybenzophenone, 2-hydroxy-4-n-dodecyloxybenzophenone, 2-hydroxy-4-benzyloxybenzophenone, bis (5-benzoyl-4-hydroxy-2-methoxyphenyl) methane, 2,2'-dihydroxy-4-methoxybenzophenone 2,2′-dihydroxy-4,4′dimethoxybenzophenone, 2,2′-dihydroxy-4,4′-tetrahydroxybenzophenone, 4-dodecyloxy-2-hydroxybenzophenone, 2-hydroxy-4-methoxy-2 '-Cal Carboxymethyl benzophenone, and the like can be exemplified 2-hydroxy-4-stearyloxy benzophenone.

  Examples of salicylate ultraviolet absorbers include pt-butylphenyl salicylate and 2,4-di-t-butylphenyl-3,5-di-t-butyl-4-hydroxybenzoate.

  Examples of the triazine-based ultraviolet absorber include hydroxyphenyl triazine-based “TINUVIN400”, “TINUVIN411L”, “TINUVIN1577FF” manufactured by Ciba Specialty Chemicals Co., Ltd., and “CYASORB UV- 1164 "and the like.

  The blending amount of the ultraviolet absorber is preferably in the range of 0.1 to 1.0 part by mass with respect to 100 parts by mass of the acrylic resin to which the rubber is added. The effect which improves the weather resistance of an acrylic resin molded object cannot fully be acquired as the compounding quantity of a ultraviolet absorber is less than 0.1 mass part. On the other hand, if the amount exceeds 1.0 part by mass, the amount of the ultraviolet absorbent becomes excessive, the ultraviolet absorbent is bleed on the surface of the acrylic resin molded article, and the appearance of the acrylic resin molded article is impaired. Therefore, by setting the blending amount of the ultraviolet absorber within the above range, the weather resistance of the acrylic resin molded body can be improved while preventing bleeding.

  As the hindered amine light stabilizer, a high molecular weight type hindered amine light stabilizer and a low molecular weight type hindered amine light stabilizer are used. The high molecular weight type hindered amine light stabilizer has a molecular weight of 2000 or more and less than 5000, and in the present invention, a molecular weight in the range of 2000 to 3000 is particularly preferable. The low molecular weight type hindered amine light stabilizer has a molecular weight of 200 or more and less than 2000, and in the present invention, a molecular weight in the range of 300 to 600 is particularly preferable. In addition, molecular weight means a number average molecular weight, and is a value measured by a gel permeation chromatography method.

  As the high molecular weight type hindered amine light stabilizer, poly ((6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl) ((2, 2,6,6-tetramethyl-4-piperidyl) imino) hexamethylene ((2,2,6,6-tetramethyl-4-piperidyl) imino)), N, N ′, N ″, N ″ '-Tetrakis- (4,6-bis- (butyl- (N-methyl-2,2,6,6-tetramethylpiperidin-4-yl) amino) -triazin-2-yl) -4,7-diazadecane -1,10-diamine and a mixture of (dimethyl succinate and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidineethanol), dibutylamine, 1,3,5-triazine, N, N'-bis (2,2,6,6 And tetramethyl-4-piperidyl-1,6-hexamethylenediamine N-(2,2,6,6 Tetoramechireru 4-piperidyl) polycondensates of butylamine and the like can be exemplified.

  Low molecular weight type hindered amine light stabilizers include bis (2,2,6,6-tetramethyl-4-piperidyl) succinate, bis (2,2,6,6-tetramethylpiperidyl) sebacate, bis (1 , 2,2,6,6-pentamethyl-4-piperidyl) 2- (3,5-di-tert-butyl-4-hydroxybenzyl) -2-butylmalonate, 1- [2- [3- (3 , 5-Di-tert-butyl-4-hydroxyphenyl) propynyloxy] ethyl] -4- [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propynyloxy] -2,2,6 , 6-tetramethylpiperidine, bis (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and methyl-1,2,2,6,6-pentamethyl-4-piperidyl A mixture of sebacate (“TINUVIN292” manufactured by Ciba Specialty Chemicals Co., Ltd.), bis (1-octoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, manufactured by Ciba Specialty Chemicals Co., Ltd. “TINUVIN123” and the like can be exemplified.

  The blending amount of the hindered amine light stabilizer is 0 to 0.5 parts by weight of the high molecular weight type hindered amine light stabilizer, and 100% by weight of the acrylic resin to which rubber is added, and the low molecular weight type hindered amine light stabilizer. Is set in the range of 0.1 to 1.0 part by mass. The effect of improving weather resistance by blending a hindered amine light stabilizer can be obtained mainly by a low molecular weight type hindered amine light stabilizer, and a high molecular weight type hindered amine light stabilizer is not an essential component. When the acrylic resin molding is exposed for a long time, the high molecular weight type hindered amine light stabilizer gradually appears near the surface after the low molecular weight type hindered amine light stabilizer is consumed and the effect is reduced. The effect is exhibited, and the decrease in the effect due to the low molecular weight type can be compensated. When the blending amount of the low molecular weight type hindered amine light stabilizer is less than 0.1 parts by mass, the weather resistance of the acrylic resin molded article cannot be sufficiently improved. On the contrary, when the blending amount of the low molecular weight type hindered amine light stabilizer exceeds 1.0 part by mass, the surface of the acrylic resin molded body may be bleed and the appearance may be impaired. Moreover, when the compounding quantity of a high molecular weight type hindered amine light stabilizer exceeds 0.5 mass part, there exists a possibility that it may bleed on the surface of an acrylic resin molded object similarly, and there exists a possibility that a weather resistance may fall on the contrary. As described above, the high molecular weight type hindered amine light stabilizer is not an essential component, but by using the low molecular weight type and this high molecular weight type hindered amine light stabilizer in combination, the weather resistance of the acrylic resin molded article can be maintained over a long period of time. Therefore, it is more preferable to add the high molecular weight type hindered amine light stabilizer in the range of 0.05 to 0.5 parts by mass.

  The acrylic resin molding material used in the present invention preferably further contains a colorant. By blending the acrylic resin molding material with a colorant and coloring the acrylic resin molded body, the weather resistance can be further improved by the light blocking property of the colorant. In particular, when an acrylic resin molding material is integrally molded and coated on the surface of the core as will be described later, the colorant can block light from passing through the molding layer of the acrylic resin molding material, and the core is lightly deteriorated. This can be prevented.

  As this colorant, an arbitrary pigment such as an inorganic pigment, a fired pigment, an organic pigment, or a dye can be used. Further, a bright material such as mica or metal powder can be used. The blending amount of the colorant is not particularly limited, but is 0 for 100 parts by mass of the acrylic resin to which the rubber is added when the glittering material is not used to express the metallic design as described later. About 1-10 mass parts is preferable.

  Further, by using a bright material such as mica or metal powder as described above as a colorant, a design of metallic feeling can be expressed in the molded body. Thus, when adding a luster material and expressing the design of a metallic feeling, the addition amount of a luster material has the preferable range of 1-9 mass parts with respect to 100 mass parts of acrylic resins to which rubber was added. When the addition amount of the glittering material is less than 1 part by mass, a metallic feeling cannot be sufficiently obtained. Conversely, when the addition amount of the glittering material exceeds 9 parts by mass, the impact resistance is greatly reduced, and molding is performed. There is a risk that the impact required for the body cannot be obtained. In addition, when a bright material is used as the colorant in this manner, a colorant other than the bright material is not an essential component, but a colorant other than the bright material may be used in combination. In this case, the colorant other than the glitter material is desirably 50 parts by mass or less (including 0 part by mass) with respect to 100 parts by mass of the glitter material. When the colorant other than the glitter material exceeds 50 parts by mass, the hiding power of the colorant other than the glitter material becomes too large, and there is a possibility that the expression of metallic feeling by the glitter material becomes insufficient.

  In addition to the above components, the acrylic resin molding material used in the present invention may contain an antioxidant, a lubricant and the like as necessary. As the lubricant, any hydrocarbons, fatty acids, higher alcohols, metal soaps, and the like can be used.

  The acrylic resin molding according to the present invention can be obtained by molding an acrylic tree molding material prepared by blending the above components. Extrusion molding and injection molding can be used as the molding method. When molding in this way, it can be molded into a single layer only with acrylic tree molding material, or it can be molded with multiple layers laminated with layers molded with other molding materials. It can also be integrally formed on the surface.

  FIG. 1 (a) shows an example in which an acrylic resin molding material is integrally formed on a core 1 by extrusion molding. From an extruder 6 while feeding a long core 1 and passing it through an extrusion die 5. Acrylic resin molding in which the surface molding layer 2 made of an acrylic resin molding material is coated on the surface of the core 1 as shown in FIG. Body A can be obtained. In this case, in addition to forming the surface molding layer 2 on both surfaces of the core 1 as shown in FIG. 1B, the surface molding layer 2 can be formed only on one surface of the core 1.

Further, the core 1 may have an irregular cross-sectional shape in addition to a planar shape. For example, the core 1 having a U-shaped cross section with an upper opening as shown in FIG. 2A or an upper surface as shown in FIG. Using a core 1 having a C-shaped opening, an acrylic resin molding material A is produced as an eaves A ₁ by integrally forming an acrylic resin molding material on the surface of the core 1 to form a surface molding layer 2. Is something that can be done. In this case, in the example of FIGS. 2 (a) and 2 (b), the surface molding layer 2 made of an acrylic resin molding material is formed only on the outer surface where weather resistance is required. 2 may be formed.

  As such a core 1, what was formed with metal materials, such as a steel plate, and what was shape | molded with the thermoplastic resin or the thermosetting resin can be used. As the thermoplastic resin, ABS resin, polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, alloy resin of polyethylene terephthalate and ABS, and the like can be used. Further, since the core 1 is not particularly required for weather resistance, these resins are used. It is also possible to use a recycled resin obtained by recycling.

In the embodiment shown in FIG. 1 (a), the surface of the core 1 is formed by extruding the acrylic resin molding material from the extruder 6 while passing the core 1 through the extrusion mold 5 using the core 1 that has been molded in advance. Although the molding layer 2 is covered, in the embodiment of FIG. 3A, an extruder 6 for extruding the acrylic resin molding material to the extrusion die 5 and an extruder 9 for extruding the resin for the core 1 are provided. Connected. In this case, while molding the core 1 with the resin extruded from the extruder 9 to the extrusion mold 5, the acrylic resin molding material is extruded from the extruder 6 to the extrusion mold 5, thereby forming the surface of the molded core 1. An acrylic resin molded body A that covers the surface molding layer 2 made of an acrylic resin molding material can be molded. For example, an eaves A ₁ similar to that shown in FIGS. 2 (a) and 2 (b) is produced. It is something that can be done.

According to the method of the FIG. 3 (a), are those that can be the core 1 is molded also be of hollow cylindrical, eg vertical gutter A ₂ and FIG round as shown in FIG. 3 (b) is capable of producing 3 vertical gutter a ₂ of the square, such as (c). 3B and 3C, the surface molding layer 2 made of an acrylic resin molding material is formed only on the outer surface of the core 1 that requires weather resistance. The surface forming layer 2 may be formed.

  As the resin for molding the core 1 as shown in FIG. 3A, thermoplastic resins such as ABS resin, polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, polyethylene terephthalate and ABS alloy resin can be used. Since the core 1 is not particularly required to have weather resistance or the like, a recycled resin obtained by recycling these resins can also be used.

  FIG. 4 (a) shows another example of integral extrusion molding. The molding machine 6 supplies the extrusion mold 5 with the acrylic resin molding material of the present invention, and other molding materials, for example, molding materials for bases. Is connected to a molding machine 7 that feeds out the acrylic resin molding material and the base molding material of the present invention from the extruders 6 and 7 while feeding the long core 1 through the extrusion die 5. By supplying to the mold 5 and molding, the base layer 8 made of the base molding material is coated on the surface of the core 1 and formed on the surface of the base layer 8 as shown in FIG. 4B. The acrylic resin molding A which coat | covered the surface molding layer 2 which consists of resin molding materials can be obtained. In this case, in addition to forming the surface molding layer 2 on both surfaces of the core 1, the surface molding layer 2 can be formed only on one surface of the core 1.

For example, a metal core 1 having a U-shaped cross section having an upper surface opened as shown in FIG. 4C is used as the core 1, and an acrylic resin molding material and a base molding material are simultaneously and integrally extruded on the surface of the core 1. , by forming the base layer 8 and the surface forming layer 2, which can be produced eaves gutters a ₁ metal core, the surface in this case, made of an acrylic resin molding material in the example of FIG. 4 (c) Although the molding layer 2 is formed only on the outer surface where weather resistance is required, the surface forming layer 2 may be formed on both the front and back surfaces.

  As the base molding material, a thermoplastic resin molding material such as ABS, polyvinyl chloride, or polyethylene can be used, and the base layer 8 molded with this base molding material has particularly weather resistance and the like. Since it is not required, recycled resin can be used.

In addition, when manufacturing the eaves bowl A ₁ and the vertical bowl A ₂ by extrusion integral molding as described above, as shown in FIGS. 5A and 5C, the unevenness 10 along the extrusion direction is formed on the surface of the surface molding layer 2. Further, as shown in FIGS. 5B and 5D, irregular irregularities 11 may be provided on the surface of the surface molding layer 2. 5A and 5B show a part of FIGS. 2A and 2B and FIGS. 3B and 3C, and FIGS. 5C and 5D show FIGS. Some are shown. The formation of the unevenness 10 along the extrusion direction as shown in FIGS. 5A and 5C can be performed by providing the extrusion mold 5 with an uneven portion corresponding to the unevenness 10. Further, the irregular irregularities 11 as shown in FIGS. 5B and 5D are formed by adding a foaming agent to the acrylic resin molding material and foaming, or adding a hollow foam to the acrylic resin molding material. It can be done by doing.

  Further, the acrylic resin molding A can be molded by injection molding by injecting and injecting the acrylic resin molding material of the present invention into an injection mold. Fig.6 (a) shows what molded the acrylic resin molded object A in the layer of the acrylic resin molding material. FIG. 6B shows the surface molding layer 2 made of an acrylic resin molding material on the surface of the core 1 by injecting and injecting the acrylic resin molding material into the injection mold with the core 1 set in the injection mold. An acrylic resin molded body A produced by integral molding is shown.

Thus, when the acrylic resin molding A is formed by injection molding, rain gutter parts such as eaves joints, dead ends, vertical joints, elbows, water collectors, and the like can be produced. FIG. 7 (a) shows the eaves joint _{A 3} for connecting eaves gutters _{A 1.} And FIG. 7 (b) are those showing a cross section of the eaves joint A _3, in the example of FIG. 7 (b), ABS resin, polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, polyethylene terephthalate and ABS alloys resins such as of or thermoplastic resin, or the outer surface of the core 1 formed in such recycled resin of these resins, by coating by integral molding surface forming layer 2 made of an acrylic resin molding material to produce the eaves joint a ₃ It is like that.

When the acrylic resin molded body A is formed by injection molding, exterior products such as window frames, air conditioner covers, skirting boards, gate posts, posts, and the like can also be produced. 8 (a) is shows a window frame A _4, as shown in FIG. 8 (b), ABS resin, polyvinyl chloride, polyethylene, polypropylene, polyethylene terephthalate, heat, such as polyethylene terephthalate and ABS alloys resin The surface molding layer 2 made of an acrylic resin molding material is integrally formed on the surface of the core 1 formed as a window frame body with a plastic resin or a recycled resin of these resins. Of the surface of the window frame A _4, on the surface not exposed to the outside is incorporated in the wall, it is not necessary to form the surface forming layer 2.

9 (a) is intended to indicate the air conditioner cover A _5, as shown in FIG. 9 (b), above the forming surface of the core 1 as a cover body in a similar resin, a surface made of an acrylic resin molding material The molding layer 2 is integrally molded and covered. The surface is not exposed to the outside of the surface of the air conditioner cover A _5, it is not necessary to form the surface forming layer 2.

10 (a) is shows the skirting A ₆ attached between the walls 11 and floor 12, as shown in FIG. 10 (b), the core 1 formed as a skirting body in the same resin and the The surface molding layer 2 made of an acrylic resin molding material is integrally molded and coated on the surface. The surface is not exposed to the outside of the surface of the skirting A _6, it is not necessary to form the surface forming layer 2.

11 (a) is intended to indicate a gatepost A _7, as shown in FIG. 11 (b), on the outer surface of the core 1 which is formed inside the hollow as gatepost body, the surface forming layer made of an acrylic resin molding material 2 is formed by integral molding. The core 1 serving as the gate post body can be formed of the same resin as described above, but can also be formed of a foamed resin. Further the surface is not exposed to the outside of the surface of the pillars A ₇ is not necessary to form the surface forming layer 2.

12 (a) is intended to indicate a post A _8, as shown in FIG. 12 (b), into and out of the surface of the core 1 formed in a box shape as a post body having an outlet 13, an acrylic resin molding material The surface molding layer 2 made of is integrally formed and covered. The core 1 serving as the post body can be formed of the same resin as described above, but can also be formed of a foamed resin. Also on the surface not exposed to the outside of the surface of the post A _8, it is not necessary to form the surface forming layer 2.

  Next, the present invention will be specifically described with reference to examples.

(Examples 1-16, Comparative Examples 1-6)
An acrylic resin molding material was prepared by mixing and kneading these materials in the amounts shown in Table 1 using the following materials.
1. Acrylic resin Methacrylic resin "LG" (MFR10g / 10min) manufactured by Sumitomo Chemical Co., Ltd.
2. Rubber / silicone resin-coated acrylic rubber: acrylic rubber “S2001” manufactured by Mitsubishi Rayon Co., Ltd. (silicone resin is grafted on the surface)
Acrylic rubber (uncoated): Mitsubishi Rayon Co., Ltd. acrylic rubber “W450”
3. UV absorber and triazine UV absorber: "UV1164" manufactured by Cytec Industries
・ Benzotriazole UV absorber: “TINUVIN234” manufactured by Ciba Specialty Chemicals Co., Ltd.
4). Hindered amine light stabilizer, high molecular weight type: Ciba Specialty Chemicals Co., Ltd. “CHIMASSORB 944FDL” (molecular weight about 2000-3100)
・ Low molecular weight type: “TINUVIN765” (molecular weight about 500) manufactured by Ciba Specialty Chemicals Co., Ltd.
5. Colorant Inorganic pigment: Iron oxide And for Examples 1 to 14, 16 and Comparative Examples 1 to 6, the above acrylic resin molding material and base molding material (vinyl chloride resin (containing filler, stabilizer, etc.)) Was used, and a steel plate was used as a core, and two-layer simultaneous integral extrusion was performed as shown in FIG. 3A to obtain an acrylic resin molded body as shown in FIG. In Example 15, the acrylic resin molded body was injection molded to obtain a single-layer acrylic resin molded body as shown in FIG.

About said Examples 1-16 and Comparative Examples 1-6, weather resistance, impact resistance, bleed property, and moldability were evaluated. These test methods are as follows. These results are shown in Table 1.
1. Weather resistance For the acrylic resin molded bodies obtained in Examples 1 to 16 and Comparative Examples 1 to 6, using a super UV tester (manufactured by Iwasaki Electric Co., Ltd.), an accelerated test is repeated to repeat condensation by UV irradiation and water shower, UV was irradiated for a total of 600 hours. And the color change of the surface of the acrylic resin molded object before performing an acceleration test and after performing an acceleration test was observed visually, and the following reference | standard evaluated. “△” or higher is acceptable.
“◎”: No change “○”: Slightly changed (level that is difficult to see visually)
“△”: Slightly changed (level at which changes can be easily seen visually)
“×”: Changed (level where change is noticeable)
2. Impact Resistance For Examples 1 to 14, 16 and Comparative Examples 1 to 6, a test piece of 20 mm × 20 mm × thickness 1 mm was prepared by extrusion molding, and for Example 15, a test piece having the same dimensions was injection molded. Was made. Then, using a DuPont impact tester (manufactured by Yasuda Seiki Seisakusho Co., Ltd.), a test was conducted using a 3/16 inch φ striker and a 1 kg drop weight in an atmosphere of 23 ° C. DuPont impact energy was determined from the drop height and evaluated.
3. Bleed property The surface of the acrylic resin molded article after the accelerated test using the super UV tester was visually observed, and the state of bleed generation was evaluated according to the following criteria. “○” or higher is acceptable.
“◎”: Beautiful surface and no problem “O”: Slightly deposited on the surface, but no problem as a product level “X”: Necked on the surface becomes a problem with appearance abnormality 4. Moldability The appearance of the acrylic resin molded bodies obtained in Examples 1 to 16 and Comparative Examples 1 to 6 was observed, and whether or not there were molding defects such as defective filling was evaluated according to the following criteria.
“◎”: No molding defects “O”: Slight molding defects in some parts, but there is no problem as a product Level “×”: There is an abnormality such as irregularities on the molding surface, and there is a problem as a product Become a level

  In Examples 1 to 16, with respect to 100 parts by mass of the acrylic resin to which rubber was added, 0.1 to 1.0 part by mass of the UV absorber, 0 to 0.5 parts by mass of the high molecular weight type hindered amine light stabilizer, Since the acrylic resin molding material contained in the range of 0.1 to 1.0 part by mass of the low molecular weight type hindered amine light stabilizer is used, all of the weather resistance, impact resistance and bleed properties are satisfactory. It was to show.

  On the other hand, Comparative Example 1 has poor weather resistance due to the small amount of the UV absorber, and Comparative Example 2 has good weather resistance because of the excessive amount of the UV absorber, but poor bleeding properties. It was. Further, Comparative Example 3 had poor weather resistance due to too much high molecular weight type hindered amine light stabilizer. This is because the excessive inclusion of high molecular weight type hindered amine light stabilizers prevents the effects of low molecular weight type hindered amine light stabilizers and relatively low molecular weight UV absorbers from appearing on the surface. It is believed that there is. Comparative Example 4 had poor weather resistance due to a small amount of low molecular weight type hindered amine light stabilizers, and Comparative Example 5 had poor bleeding due to too much low molecular weight type hindered amine light stabilizers. Furthermore, since Comparative Example 6 had no rubber added, the impact resistance was poor and could not be measured by an impact resistance test.

  Further, as seen in Example 13, it is confirmed that the use of a non-silicon-coated rubber as the added rubber results in a slight decrease in weather resistance, and it is preferable to use a silicon-coated rubber. This is considered to be because the influence of moisture can be reduced by the water repellency of silicon coated on rubber.

  Further, as seen in Examples 1, 11, 12, and 14, increasing the amount of silicon-coated rubber tends to improve impact resistance and weather resistance. This is considered to be because the use of silicon-coated rubber suppresses a decrease in weather resistance. In addition, Example 14 shows an example in which the amount of rubber added is increased so as to reach the upper limit, and there is no problem in terms of performance, but molding is difficult. If the amount of rubber added exceeds the amount of Example 14, kneading and molding of the material becomes difficult.

  Further, Example 16 shows an example in which no colorant is blended, and the surface molding layer made of an acrylic resin molding material has no particular problem in weather resistance, etc., but light passes through the surface molding layer, so that the surface The base layer under the molding layer was photo-degraded, and the appearance of the acrylic resin molding material seemed to be slightly changed due to discoloration due to this degradation.

  Examples 1 to 14 and 16 are extrusion-molded, and Example 15 is injection-molded. However, there is no particular problem in moldability, and the acrylic resin molding material can be applied to both extrusion molding and injection molding. Was confirmed.

(Examples 17 to 24)
A bright material (mica: 30 mesh) and a pigment (iron oxide) are blended as coloring agents in the blending amounts shown in Table 2, and acrylic resin, rubber, UV absorber, and hindered amine light stabilizer are blended in the same manner as in Example 1. In this way, an acrylic resin molding material is prepared in the same manner as described above, and further, two-layer simultaneous integral extrusion molding as shown in FIG. 3 (a) is performed to obtain an acrylic resin molding as shown in FIG. 3 (b). Got.

For Examples 17 to 24, the weather resistance, impact resistance, bleed property, and moldability were evaluated in the same manner as described above, and whether a metallic feeling (mica's glittering feeling) was visually obtained was determined according to the following criteria. evaluated. The results are shown in Table 2.
“◎”: There is a metallic feeling “O”: There is a little glittering but there is a metallic feeling “×”: A level where there is no metallic feeling and no metallic appearance

  As seen in Table 2, the glittering material is in the range of 1 to 9 parts by weight with respect to 100 parts by weight of the acrylic resin added with rubber, and the pigment is 50 parts by weight or less with respect to 100 parts by weight of the glittering material. In all of Examples 17 to 21, a good metallic appearance could be obtained. On the other hand, it was difficult to obtain a metallic appearance in Example 22 in which the addition amount of the glittering material was small and in Example 24 in which the amount of the pigment relative to the glittering material was large. Further, in Example 23 in which the addition amount of the glittering material was large, the impact resistance was slightly lowered.

An example of embodiment of this invention is shown, (a) is the schematic of the method of shaping | molding, (b) is sectional drawing of an acrylic resin molded object. The eaves as an acrylic resin molding is shown, (a) (b) is sectional drawing, respectively. It shows another example of the embodiment of the present invention, (a) is a schematic diagram of the molding method, (b) (c) is a cross-sectional view showing a vertical hook as an acrylic resin molded body, respectively. . It shows another example of an embodiment of the present invention, (a) is a schematic diagram of a molding method, (b) is a cross-sectional view of an acrylic resin molded body, (c) is an eaves as an acrylic resin molded body It is sectional drawing which shows a scissors. (A)-(d) is an expanded sectional view of a part of eaves eaves and a freshly made eaves. An example of embodiment of this invention is shown, (a) (b) is sectional drawing of an acrylic resin molded object, respectively. The eaves joint as an acrylic resin molded object is shown, (a) is a perspective view, (b) is sectional drawing. The window frame as an acrylic resin molded object is shown, (a) is a perspective view, (b) is the sectional view on the aa line of (a). The air-conditioner cover as an acrylic resin molded object is shown, (a) is a perspective view, (b) is the sectional view on the aa line of (a). The baseboard as an acrylic resin molded object is shown, (a) is a perspective view, (b) is the sectional view on the aa line of (a). The gate pillar as an acrylic resin molded object is shown, (a) is a perspective view, (b) is the sectional view on the aa line of (a). The post as an acrylic resin molded object is shown, (a) is a perspective view, (b) is the sectional view on the aa line of (a).

Explanation of symbols

1 Core 2 Surface molding layer A Acrylic resin molding

Claims (6)

  0.1 to 1.0 parts by mass of UV absorber, 0 to 0.5 parts by mass of high molecular weight type hindered amine light stabilizer, 100% by mass of hindered amine of low molecular weight An acrylic resin molded article, wherein an acrylic resin molding material containing 0.1 to 1.0 part by mass of a light stabilizer is molded.   2. The acrylic resin molded article according to claim 1, wherein the rubber is coated with a silicon compound on at least a part of a surface thereof.   The said rubber | gum is 10-60 mass parts addition with respect to a total of 100 mass of an acrylic resin and rubber | gum, The acrylic resin molded object of Claim 1 or 2 characterized by the above-mentioned.   The acrylic resin molding material according to any one of claims 1 to 3, wherein the acrylic resin molding material contains a colorant.   When using at least a glittering material as the colorant, the glittering material is 1 to 9 parts by weight with respect to 100 parts by weight of the acrylic resin added with rubber, and the colorant other than the glittering material is 0 to 50 parts by weight with respect to 100 parts by weight of the glittering material. The acrylic resin molded article according to claim 4, wherein part of the acrylic resin molded article is added.   The acrylic resin molding material is formed by extrusion integral molding or injection integral molding on the surface of a core formed of at least one of a metal and a thermoplastic resin. Acrylic resin molding as described.

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