JPH10292101A - Resin composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin composition for molding product excellent in impact resistance and profound in appearance, by making a polycarbonate, a polyarylate, a polyethylene terephthalate and/or a polybutylene terephthalate contain an inorganic filler. SOLUTION: A resin component in the total amount of 100 pts.wt., comprising (A) 30-80 wt.% preferably 30-70 wt.% of a polycarbonate, (B) 5-60 wt.%, preferably 5-20 wt.% of a polyarylate and (C) 0-60 wt.%, preferably 10-60 wt.% of a polyethylene terephthalate and/or a polybutylene terephthalate, is compounded with 20-100 pts.wt. of an inorganic filler such as barium sulfate, zinc sulfate, titanium oxide, silica or glass powder (preferably 40-80 pts.wt. of the inorganic filler in the case in which the inorganic filler is glass particles and 60-100 pts.wt. in the case in which the inorganic filler is barium sulfate), to obtain the objective composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a resin composition, and more particularly, to various trays, kitchen system members, bathtubs,
Housing materials such as wall materials, table tops, flooring materials, interior decoration materials,
The present invention relates to a resin composition used for display materials and the like.

[0002]

2. Description of the Related Art Various materials such as trays, kitchen system members, bathtubs, wall materials, table tops, flooring materials, and other housing materials, interior decoration materials, display materials, and the like have conventionally been inorganic compounds such as ceramics, vinyl chloride, and inorganic fillers. Thermosetting resins containing materials have been used. However, these have problems such as poor impact resistance, poor moldability, difficulty in recycling, and the danger of generating toxic gas during incineration. Therefore,
A composition has been proposed in which an inorganic filler is blended with a thermoplastic resin such as polycarbonate, polyethylene terephthalate, and polybutylene terephthalate. (Japanese Patent Laid-Open No. 4-1
No. 61445, JP-A-6-278665)

[0003]

However, although these compositions have improved moldability, they also have problems such as insufficient impact properties, excessive surface gloss, and lack of weight.

[0004]

That is, the gist of the present invention is as follows.
30-80% by weight of polycarbonate, polyarylate 5
A resin composition comprising 20 to 200 parts by weight of an inorganic filler with respect to 100 parts by weight of a total of 100 to 60% by weight of a resin component consisting of polyethylene terephthalate and / or 0 to 60% by weight of polybutylene terephthalate. Exist.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The resin composition of the present invention contains polycarbonate in an amount of 30 to 80% by weight, preferably 3% by weight of the resin component.
It contains 0-70% by weight. When the content of the polycarbonate is less than 30% by weight, the impact strength of the molded product is reduced, while when it exceeds 80% by weight, the chemical resistance of the molded product is reduced.

In the resin composition of the present invention, the polyarylate is used in an amount of 5 to 60% by weight, preferably 5 to 20% by weight of the resin component.
% By weight. By blending polyarylate, impact resistance can be improved and surface gloss can be reduced. If the polyarylate is less than 5% by weight, it is not possible to impart sufficient impact strength to the molded product, and the surface gloss will be too large. Even if the polyarylate exceeds 60% by weight, the effects such as improvement of impact resistance and control of surface gloss do not change, and the sheet formability tends to deteriorate.

The resin composition of the present invention contains polyethylene terephthalate and / or polybutylene terephthalate in an amount of 0 to 60% by weight, preferably 10 to 60% by weight of the resin component.
contains. Addition of 10% by weight or more of polyethylene terephthalate and / or polybutylene terephthalate improves the secondary workability of the sheet. If it exceeds 60% by weight, the impact resistance of the molded product is undesirably reduced.

[0008] The resin composition of the present invention contains 20 to 200 parts by weight of an inorganic filler based on 100 parts by weight of the total amount of the resin component comprising polycarbonate, polyarylate, and, if necessary, polyethylene terephthalate and / or polybutylene terephthalate. contains. If the amount of the inorganic filler is less than 20 parts by weight, the texture and surface hardness of the sheet will not be sufficiently improved, and if it exceeds 200 parts by weight, the impact strength of the sheet will be significantly reduced.

As the inorganic filler, usually, glass, cement, quartz, mica, fly ash, clay, talc,
Examples include silica, alumina, magnesia, zinc white, titanium dioxide, barium carbonate, calcium carbonate, aluminum hydroxide, magnesium hydroxide, zinc sulfide, aluminum sulfate, barium sulfate, and gypsum. These may be used alone or as a mixture of two or more.

The preferred amount of the inorganic filler varies depending on the type of the inorganic filler, and when the inorganic filler is glass particles, 40 to 80 parts by weight based on 100 parts by weight of the total amount of the resin component.
Parts by weight, in the case of barium sulfate, the total amount of resin components is 100
60 to 100 parts by weight are added to the parts by weight. In the present invention, in order to improve the light resistance, it is preferable that titanium dioxide is added in an amount of 0.1 part by weight or more, preferably 0.5 to 5 parts by weight, based on 100 parts by weight of the total amount of the resin component.

These inorganic fillers are appropriately selected according to the purpose. For example, when emphasis is placed on the surface hardness of the sheet, an inorganic filler containing 20% or more, preferably 30% or more of silicon oxide is used. used. In order to increase the specific gravity of the sheet and improve the texture, barium sulfate is preferably used. The particle size of the inorganic filler used in the present invention is usually
It is 200 μm or less, preferably 100 μm or less, more preferably 20 μm or less. When the particle size is 200 μm or less, when the sheet is formed, the smoothness of the sheet surface can be maintained, and a sheet with a high gloss and a high design property can be obtained.

The resin composition of the present invention may optionally contain additives such as a toning agent, an antioxidant, a lubricant, a pigment, an antistatic agent, and an antibacterial agent. The sheet made of the resin composition of the present invention is excellent in solid feeling, and has a 60-degree gloss value, which is one of the indexes of the solid feeling, is usually 30 or less, preferably 20 or less. Further, the sheet made of the resin composition of the present invention has a sufficient hardness, and usually has a surface hardness of H or more.

The sheet of the present invention is formed by a known method. For example, an extruder equipped with a T-die after obtaining a resin composition by kneading a resin, an inorganic filler, and additives as necessary using an extruder, a twin-screw extruder, a mixing roll, a Brabender, and the like. And extruding into a sheet using a forming roll.

Further, in order to obtain a sheet rich in design,
The sheet may have a three-dimensional appearance with an uneven pattern on the surface. For a sheet having an uneven pattern on the surface, a method using a molding roll having an uneven pattern on the surface, a method of pressing a mold having an uneven pattern on a sheet having a smooth surface under heating or without heating and transferring the pattern, etc. Can be obtained by In this case, the depth of the unevenness is preferably 0.1 mm or more from the viewpoint of design.

[0015] The sheet of the present invention may be laminated with other materials. By stacking, a material with high functionality can be provided. Examples of other materials include foamed resins, materials having a porous structure inside such as calcium silicate, resins such as polypropylene and polyethylene, and wood. As the production method, known techniques such as heat fusion of layers, lamination using an adhesive, and a method of forming a multilayer structure at the time of sheet molding using a multilayer die can be used.

[0016]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited to the following Examples without departing from the scope of the invention. The materials used in the examples are as follows. Polycarbonate PC: Brand name Norex 7030PJ, Polyethylene terephthalate manufactured by Mitsubishi Engineering-Link Plastic Co., Ltd. PBT: Brand name Nohart Wool 5040ZS, Mitsubishi Engineering Link Plastics Co., Ltd. Polyethylene terephthalate PET: Brand name Noha Hex GS400, manufactured by Mitsubishi Chemical Corporation Brand name NOPA HEX BK2180, manufactured by Mitsubishi Chemical Corporation Titanium dioxide Titanium White: brand name SR-1, manufactured by Sakai Chemical Co., Ltd., average particle size 0.2 μm Polyarylate PAR1: brand name P3001, unitika PAR2: Product name U8000, manufactured by Unitika Ltd. PAR3: Product name U100, manufactured by Unitika Ltd. polyesteramide PAR4: Product name B950, Polyplastics Co., Ltd.
Manufactured by Zinc Sulfide ZnS: HD-S (trade name), manufactured by Tokyo Shin Nihon Kasei Co., Ltd., average particle size: 0.3 μm Barium sulfate: Ba: Brand name: BS, manufactured by Sakai Chemical Co., Ltd., average particle size: 8 μm Glass powder: commercial product E325, manufactured by Nippon Sheet Glass Co., Ltd., average particle size 8 μm

<Examples 1 to 11 and Comparative Examples 1 to 3> Using a twin-screw extruder (BT-40) manufactured by Plastics Engineering Laboratory, using an extruding temperature of 260 ° C. and a mixing ratio shown in Tables 1 and 2, Was kneaded to obtain a compound. Next, a T-die having a width of 250 mm and a lip gap of 3 mm was connected to the extruder, and the obtained compound was extruded into a sheet at an extrusion temperature of 265 ° C., and cooled between two metal rolls. I got

The impact strength of the obtained resin sheet and 6
A 0 degree gloss value was measured. The results are shown in Table-3. The impact strength of the resin sheet is 10cm in width with a 15cm span fixing device.
Was fixed at both ends, and a steel ball of 1045 g (diameter: 63.5 mm) was dropped from a height of 100 cm to evaluate whether or not the sheet was broken. The 60-degree gloss value was measured with a micro trigloss (manufactured by Big Gardner).

[0019]

[Table 1]

[0020]

[Table 2] * In each of the compositions of Examples 1 to 11 and Comparative Examples 1 to 3, in addition to the components shown in Tables 1 and 2, 0.5 part by weight of a lubricant and 0.1 part by weight with respect to 100 parts by weight of a resin component. Of stabilizer was added. * In Tables 1 and 2, resin components such as PC, PET, PBT, and PAR indicate the weight% of the total resin component, and the inorganic filler indicates the amount added to the resin component in 100 parts by weight. I have.

[0021]

[Table 3]

Example 12 An EVA-based activated polyolefin film (about 0.1 mm thick) and an expanded polystyrene sheet as an adhesive layer were sandwiched between two sheets obtained in Example 1, and two sheets were obtained. The laminate was obtained by heating between 120 ° C. hot plates for 15 minutes. When this laminate was used as a door material, the strength was sufficient.

Example 13 A sheet was formed in the same manner as in Example 1 except that one of the metal rolls was provided with a 0.3 mm uneven structure on its surface. As a result, a sheet having a rich design with a substantially transferred structure of the roll was obtained. A polyethylene sheet (6 mm) is sandwiched between two sheets with the uneven surface facing outward, and an adhesive (Chemlock 459X, TY
RITE 7660: Road Far East
INC. To obtain a laminate. When this laminate was used as a wall material, the rigidity was sufficient.

[0024]

According to the present invention, there can be obtained a resin composition which is excellent in impact resistance and can give a molded article having a solid appearance with suppressed surface gloss.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI C08K 7/14 C08K 7/14 C08L 67/03 C08L 67/03

Claims (6)

[Claims] 1. Polycarbonate 30 to 80% by weight, polyarylate 5 to 60% by weight, and polyethylene terephthalate and / or polybutylene terephthalate 0 to 30% by weight.
A resin composition obtained by blending 20 to 200 parts by weight of an inorganic filler with respect to 100 parts by weight of a total of 60% by weight of a resin component. 2. The resin composition according to claim 1, comprising 10 to 60% by weight of polyethylene terephthalate and / or polybutylene terephthalate. 3. The resin composition according to claim 1, wherein the inorganic filler is at least one selected from the group consisting of barium sulfate, zinc sulfide, titanium oxide, silica, and glass powder. 4. A sheet comprising the resin composition according to claim 1. 5. The sheet according to claim 4, wherein the 60-degree gloss value is 30 or less. 6. A sheet in a molten state of a thermoplastic resin is supplied to a pair of sheeting rolls at a temperature equal to or lower than the solidification temperature of the thermoplastic resin and at least one roll having an uneven structure on the surface, and cooled. The sheet according to claim 4, which is produced by the above method.