JPH10316817A - Vinyl chloride resin composition and molded product using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vinyl chloride resin composition enabling to improve a woody touch and simultaneously improve an impact-resistant strength and good in the balance between the woody touch and the impact-resistant strength, wherein the woody touch and the impact-resistant strength have a mutually opposing relation, and to provide a molded product using the composition. SOLUTION: This vinyl chloride resin composition excellent in woody touch and impact resistance comprises 100 pts.wt. of a vinyl chloride resin, 1-35 pts.wt. of cellulose powder having a brightness of 65-95% and 1-30 pts.wt. of one or more kinds of resins selected from MBS resins, acrylic resins and silicone- modified acrylic resins. The molded product is produced by melt-molding the composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vinyl chloride resin composition and a molded article using the same. More specifically, the present invention relates to a vinyl chloride resin composition which has a synergistic effect by mixing cellulose powder and a specific resin. The present invention relates to a vinyl chloride resin composition having excellent woody feel and excellent impact resistance, and a molded article using the same.

[0002]

2. Description of the Related Art Conventionally, in order to obtain a hard synthetic resin molded product, for example, a molded product having a woody feel of a hard vinyl chloride resin, a hard synthetic resin molded product is produced by incorporating wood powder, cellulose powder, or the like. . When the amount of these wood flours is increased, the woody texture is increased, and a very warm molded product is obtained, but the strength is reduced with the added amount. Also, in addition to the wood flour, a foaming agent is added,
Although there is a synthetic resin molded article whose weight has been reduced to that of a real tree, the impact strength decreases as the expansion ratio increases. If the strength is low, it cannot be used for window frames, handrails, etc., which are interior materials for housing, and it is necessary to maintain the strength of the molded product as a joint structure made of aluminum or iron. In particular, in the case of a joint, the molding process is complicated. In addition, in order to maintain the strength to some extent, the amount of wood powder or cellulose powder must be reduced, but in this case, the wood texture is reduced, and the balance between the wood texture and the strength is extremely high. difficult.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the conventional method, further improves the feeling of wood, and also improves the strength. It is an object of the present invention to provide a vinyl chloride resin composition and a molded article using the same.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies to solve such problems, and as a result, by adding cellulose powder and a specific resin to a vinyl chloride-based resin and mixing the same, the wood is produced. It was found that a resin composition having a good balance of texture and impact resistance was obtained, and the present invention was reached.

That is, the present invention relates to a vinyl chloride resin 10
1 to 35 parts by weight of a cellulose powder having a whiteness of 65 to 95% with respect to 0 parts by weight, and MBS-based resin, acrylic resin and silicon-modified acrylic-based resin each alone or a mixture of two or more thereof. It is a vinyl chloride resin composition having excellent woody feel and impact resistance comprising up to 30 parts by weight. Further, the present invention is a vinyl chloride resin molded product obtained by melt-molding the vinyl chloride resin composition.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the amount of cellulose powder added to obtain a woody feel is incompatible with the impact resistance, and could not be increased without loss. However, MBS-based resins, acrylic-based resins, and silicon-modified acrylic-based resins as impact modifiers that have been added to improve the conventional strength (impact resistance) are
By adding to a vinyl chloride resin containing cellulose powder, the strength can be maintained without deteriorating the woody feel. By adding this impact modifier within a specific range, a synergistic effect of improving not only the impact resistance but also the wood texture can be seen.

In the present invention, the vinyl chloride resin is
Grafting vinyl chloride onto vinyl chloride homopolymer, ethylene-vinyl chloride copolymer, vinyl acetate-vinyl chloride copolymer, copolymer of alkyl acrylate and / or alkyl methacrylate and polyfunctional monomer Examples include a vinyl chloride graft copolymer obtained by copolymerization, and a vinyl chloride graft copolymer obtained by graft copolymerizing vinyl chloride with an ethylene-vinyl acetate copolymer.

Here, in the case of a vinyl chloride homopolymer, its production method is carried out by a conventionally known polymerization method, such as suspension polymerization. The polymerization degree is usually 400 to 20
It is about 00, preferably 600 to 1500, and more preferably 700 to 1300. If the degree of polymerization is less than 400, the strength is insufficient, and if it exceeds 2,000, the moldability decreases.

[0009] These vinyl chloride homopolymers are easily available on the market. For example, T.V.
H-500, TH-600, TH-700, TH-80
0, TH-1000, TH-1300, TH-140
0, TH-1700, TH-2000, etc., and the degree of polymerization is 500, 600, 700, 8 respectively.
00, 1000, 1300, 1400, 1700, 20
00.

In the case of the ethylene-vinyl chloride copolymer and the vinyl acetate-vinyl chloride copolymer, their production methods are carried out by a conventionally known polymerization method, such as suspension polymerization. The polymerization degree is usually about 400 to 2000, preferably 600 to 1500, and more preferably 700 to 1300. If the degree of polymerization is less than 400, deficiency occurs in physical properties, and if it exceeds 2,000, moldability deteriorates.

These ethylene-vinyl chloride copolymers are easily available on the market, and include, for example, TE-650, TE-800 and TE-10 manufactured by Taiyo PVC Co., Ltd.
50, TE-1300, TE-1700, etc., and the degree of polymerization is 650, 780, 105, respectively.
0, 1300, and 1700. Also, as a vinyl acetate-vinyl chloride copolymer, for example, there is TV-800 manufactured by Taiyo Vinyl Co., Ltd., and the polymerization degree is 780, and these can be easily obtained in the market.

Next, a vinyl chloride graft copolymer obtained by graft copolymerizing vinyl chloride is a copolymer of alkyl acrylate and / or alkyl methacrylate with a polyfunctional monomer (hereinafter referred to as acrylic Is copolymerized with vinyl chloride. More specifically, 99 to 70 parts by weight of vinyl chloride is graft-copolymerized with 1 to 30 parts by weight of an acrylic copolymer.

[0013] As the alkyl acrylate and / or alkyl methacrylate in the acrylic copolymer, it is advantageous that the secondary transition point of the alkyl acrylate and / or alkyl methacrylate alone is -10 ° C or less from the viewpoint of improving impact resistance. Examples include, for example, ethyl acrylate, n-propyl acrylate, iso-butyl acrylate, n-butyl acrylate, n-hexyl acrylate, 2-ethylhexyl acrylate, n-octyl acrylate, n-decyl acrylate, n-octyl methacrylate, n-
Decyl methacrylate, n-dodecyl methacrylate, lauryl methacrylate and the like can be mentioned. In this case, the amount of the alkyl acrylate and / or the alkyl methacrylate used is 99 to 70 in the acrylic copolymer.
% By weight is preferred. If the amount exceeds 99% by weight, the flexural modulus decreases, and if it is less than 70% by weight, the impact resistance decreases, which is not preferable.

The polyfunctional monomer is a monomer which can be copolymerized with an alkyl acrylate and / or an alkyl methacrylate and participates in crosslinking in a copolymer or a graft copolymer. For example, ethylene glycol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, 1,3-propylene glycol dimethacrylate, 1,3-butylene (Poly) alkylene glycol acrylates or methacrylates such as glycol dimethacrylate, 1,4-butylene glycol dimethacrylate, diallyl phthalate, diallyl male Over DOO, diallyl fumarate, polyallyl compounds such as diallyl succinate, divinyl benzene, butadiene and the like. The amount of the polyfunctional monomer to be used is preferably 1 to 30% by weight in the acrylic copolymer. If it is less than 1% by weight, the flexural modulus is lowered, and if it exceeds 30% by weight, the impact resistance is increased. Is undesirably reduced.

As a method for obtaining these acrylic copolymers, any of polymerization methods such as emulsion polymerization, solution polymerization, bulk polymerization and the like can be used, and generally known emulsifiers, dispersants, catalysts and the like can be used. To obtain a polymer. For example, as a method for obtaining an acrylic copolymer by an emulsion polymerization method, pure water, an anionic emulsifier, and a water-soluble polymerization catalyst are put in a jacketed polymerization reactor, air in the can is eliminated, and then alkyl acrylate and After charging and / or emulsifying an alkyl methacrylate and a polyfunctional monomer, the inside of the can is heated by a jacket to carry out a copolymerization reaction. This copolymerization reaction is an exothermic reaction, and the internal temperature is controlled by a jacket as necessary. After the reaction,
Unreacted monomers are removed outside the can to obtain an acrylic copolymer. If necessary, a particle size adjuster for the acrylic copolymer, a catalyst decomposition accelerator for controlling the copolymerization reaction, and the like may be added.

Next, vinyl chloride is graft-copolymerized by using the acrylic copolymer thus obtained as a trunk copolymer for graft copolymerization to obtain a vinyl chloride-based graft copolymer. Here, examples of the graft copolymerization method include polymerization methods such as emulsion polymerization, suspension polymerization, solution polymerization, and solventless polymerization. For example, when performing a suspension polymerization method, in a polymerization reactor with a jacket, pure water, a suspension stabilizer such as hydroxypropylmethylcellulose, a radical polymerization initiator,
After adding a polymerization degree reducing agent as needed, an acrylic copolymer is added and suspended. Here, the amount of pure water used is 1 to 5 with respect to the total amount of the acrylic copolymer and the vinyl chloride monomer.
And preferably 1 to 3 times. Then, after the air in the can is eliminated, vinyl chloride is inserted together with other vinyl compounds as required. Thereafter, the inside of the can is heated by a jacket, and the acrylic copolymer is dissolved in vinyl chlorides to start graft copolymerization. The graft copolymerization is an exothermic reaction, and the internal temperature is controlled by a jacket as necessary. After completion of the reaction, unreacted vinyl chlorides are removed outside the can to obtain a slurry-like graft copolymer. The slurry is dehydrated and dried according to a conventional method to obtain a vinyl chloride graft copolymer. The method of charging the polymerization reactor is not limited, and among the raw materials such as pure water, suspension stabilizer, acrylic copolymer, and vinyl chloride, the acrylic copolymer is converted to vinyl chloride. A method of dissolving and charging the solution is also adopted. The graft ratio here is represented by THF (tetrahydrofuran) -insoluble weight% of the graft copolymer, usually 5 to 100% by weight, and generally about 10% by weight is preferably used.

The vinyl chloride graft copolymer thus obtained is mixed with a vinyl chloride resin by a generally known method so as to contain at least 10% by weight or more to obtain a vinyl chloride resin. Here, if the content of the vinyl chloride graft copolymer is less than 10% by weight, improvement in impact resistance cannot be expected. Further, the vinyl chloride graft copolymer itself can be used as the vinyl chloride resin without mixing with the vinyl chloride resin. The degree of polymerization of the vinyl chloride graft copolymer resin thus obtained is usually about 400 to 2000, preferably 600 to 1
500, more preferably 700 to 1300. If the degree of polymerization is less than 400, the strength is insufficient, and 3000
If the ratio exceeds the above range, the moldability will decrease.

These vinyl chloride-based graft copolymers are easily available on the market. For example, TA-I200, TA-I100, and TA-I100 manufactured by Taiyo PVC Co., Ltd.
E200, TA-E230 and the like can be used, and the degree of polymerization is 500, 700, 1000, and 1300, respectively.

On the other hand, in the case of a vinyl chloride graft copolymer obtained by graft copolymerizing vinyl chloride with an ethylene-vinyl acetate copolymer, vinyl chloride is graft copolymerized with the above acrylic copolymer. In the same manner as described above, a vinyl chloride graft copolymer is obtained by graft copolymerizing vinyl chloride using an ethylene-vinyl acetate copolymer as a trunk copolymer for graft copolymerization. Here, examples of the graft copolymerization method include polymerization methods such as emulsion polymerization, suspension polymerization, solution polymerization, and solventless polymerization. Since rubber elasticity is imparted by ethylene-vinyl acetate, it is extremely excellent in brittleness at low temperatures, impact resistance and weather resistance.

These vinyl chloride-based graft copolymers are easily available on the market. For example, TG-110, TG-120, and TG-13 manufactured by Taiyo PVC Co., Ltd.
0 can be used, and the degree of polymerization is 90
0, 700, and 850.

Here, as the vinyl chloride resin, a vinyl chloride homopolymer, a vinyl chloride copolymer and a vinyl chloride graft copolymer may be used alone, or two or more of these may be used. They may be mixed and used by a general known method.

The cellulose powder used in the present invention may be made of wood, pulp or paper alone, or a mixture of two or more of these may be subjected to an acid or alkali hydrolysis treatment to give wood acid or lignin. It has a whiteness of 65 to 95% from which impurities have been removed, and is used to impart a woody feeling such as a touch feeling and gloss. These are easily available in the market, for example, 80% whiteness (JIS P8123- 6) manufactured by Nippon Paper Industries Co., Ltd.
1), 100 mesh pass KC Floc W100, 2
Although there are different sizes such as KC Floc W200 of a 00 mesh pass, any of them can be used.

The number of these added parts is 1 to 35 parts by weight, preferably 2 to 30 parts by weight, more preferably 5 to 20 parts by weight based on 100 parts by weight of the vinyl chloride resin. If the amount is less than 1 part by weight, the feeling of wood having a rough surface due to touch is small, and if it exceeds 35 parts by weight, the resin becomes brittle and the strength is reduced.

In the present invention, the impact resistance is improved,
Moreover, examples of the impact resistance improver that produces a synergistic effect with cellulose powder, which also improves the woody feel, include MBS resins, acrylic resins, and silicon-modified acrylic resins. The MBS-based resin is mainly a ternary copolymer of methyl methacrylate-butadiene-styrene, and these are easily available on the market.
BTA-712, BTA-7 manufactured by Kureha Chemical Industry Co., Ltd.
31, BTA-751 and the like. The acrylic resin is mainly composed of acrylic rubber as a first component, two or more of alkyl acrylate, styrene and acrylonitrile as a second component, and methyl methacrylate and alkyl acrylate as a third component. It is a copolymer of component, second component and third component. These are easily available on the market. For example, FM, FM-20, FM manufactured by Kanegafuchi Chemical Industry Co., Ltd.
-21. Further, the silicone-modified acrylic resin mainly comprises an acrylic rubber and a polyorganosiloxane as a first component, and at least two of an alkyl acrylate, an alkyl methacrylate, styrene and acrylonitrile as a second component. It is a copolymer of the component and the second component. These are easily available on the market, for example, S-2001 manufactured by Mitsubishi Rayon Co., Ltd.

The above-mentioned impact modifiers for improving the woody feel and impact resistance can be used alone or in admixture of two or more. The amount is 1 to 30 parts by weight, preferably 3 to 25 parts by weight, and more preferably 5 to 20 parts by weight based on 100 parts by weight. If the amount is less than 1 part by weight, improvement in woody feel and impact resistance cannot be expected much. If the amount exceeds 30 parts by weight, the impact resistance is improved by the amount of the added portion, but the improvement of the wooden texture cannot be expected, which is uneconomical, and the synergistic effect of the impact resistance and the wooden texture does not appear.

In the vinyl chloride resin composition of the present invention, other commonly used stabilizers, lubricants, plasticizers, processing aids, antioxidants, ultraviolet absorbers, pigments, fillers, and the like may be added as required. Can be used.

The stabilizer mentioned here is easily available on the market, for example, lead white, tribasic lead sulfate, dibasic lead phosphite, dibasic lead phthalate, tribasic maleic acid. Lead-based stabilizers such as lead oxalate, lead stearate, lead silicate and silica gel coprecipitate; metal soaps such as magnesium stearate, calcium stearate, calcium laurate, barium stearate, barium laurate;
There are metal salts such as barium / zinc and calcium / zinc. The organic tin-based stabilizer has an alkyl group such as a methyl group, a butyl group or an octyl group, and is roughly classified into a carboxylate-based, a malate-based, and a mercapto-based depending on the type of the substituent. These are readily available on the market and include, for example, dimethyltin bis-2-ethylhexyl thioglycolate, dibutyltin dilaurate, dibutyltin malate, dibutyltin mercapto, dioctyltin bis-2-ethylhexylthioglycolate, and the like. .

Examples of the lubricant include hydrocarbons such as liquid paraffin, paraffin wax and synthetic polyethylene wax, fatty acids such as stearic acid, behenic acid and 12-hydroxystearic acid, zinc stearate, calcium stearate and magnesium stearate. Examples include metal soaps, glycerin monostearate, glycerin monooleate, butyl stearate, esters such as monoglyceride stearate and hardened oil, and higher alcohols such as stearic alcohol. These can be used alone or in combination of two or more.

Examples of the plasticizer include phthalic acids such as diethyl hexyl phthalate and diisononyl phthalate, epoxy compounds such as epoxidized soybean oil and butyl epoxidized fatty acid, and aliphatic compounds such as diethyl hexyl adipate and diisononyl adipate. Dibasic acid esters, polyesters comprising polycondensation compounds of the above-mentioned aliphatic dibasic acids and glycols, chlorinated paraffins, phosphates such as tricresyl phosphate, triphenyl phosphate, etc., tri-2-ethylhexyltri A trimellitate ester such as melitate and triisodecyl trimellitate can be used. These can be used alone or in combination of two or more.

Examples of the processing aid include polymethyl methacrylate (PMMA). Examples of the pigment include titanium oxide, red iron oxide, graphite, carbon black, carbon white, lithopone, and the like. Among them, titanium oxide is mainly used. Further fillers include, for example, calcium carbonate, clay, hydrated silicic acid, anhydrous silicic acid, calcium silicate, aluminum silicate asbestos powder, antimony oxide, talc, aluminum trihydrate, zinc borohydrate, magnesium oxide, sodium bicarbonate, nitric acid, Calcium hydroxide, mica, synthetic fluorine mica and the like,
Among them, calcium carbonate is preferably used.

As described above, generally used additives are easily available on the market, are often used, and can be used or used in combination as needed.

The method for obtaining the vinyl chloride resin composition according to the present invention is as follows:
Cellulose powder which has been subjected to acid or alkali hydrolysis treatment to remove impurities such as wood acid and lignin, and MBS resin, acrylic resin and silicone-modified acrylic resin as impact modifiers alone or in combination with each other. As a mixture of more than one kind, further adding a stabilizer, a lubricant, and other additives as necessary, for example, stirring and blending with a stirrer such as a Henschel mixer, a Banbury mixer, a ribbon blender, and the obtained blended powder Alternatively, the blended powder can be melt-molded with a kneader such as a conical twin-screw extruder, a parallel twin-screw extruder, a single-screw extruder, a kneader-type kneader, or a roll kneader to obtain pellets. Melt molding using extruders such as conical twin-screw extruder, parallel twin-screw extruder, and single-screw extruder using the compounded powder or pellets, which are vinyl chloride resin compositions having excellent woody feel and impact resistance. By processing, it can be obtained as a vinyl chloride-based resin molded article having excellent woody feel and impact resistance.

[0033]

EXAMPLES The present invention will be described more specifically with reference to the following examples. However, this embodiment is merely illustrative, and the present invention is not limited thereto. In addition, the measuring method in an Example is as follows.

The vinyl chloride resin composition shown in Table 1 was manufactured by Ikegai Iron Works Co., Ltd.
0mm single screw full flight screw-extruder FS40
At -25 (screw diameter 40 mm, L / D = 25), cylinder set temperature 140 ° C. to 170 ° C., adapter set temperature 145 ° C. to 165 ° C., die set temperature 150
A flat molded article having a width of 80 mm, a thickness of 4 mm, and a length of 100 mm was formed at a temperature of from 170C to 170C. Using the obtained molded article, the wooden feeling and impact resistance were evaluated as follows. -Regarding the feeling of wood, the gloss of the surface of the molded article was measured and evaluated. The measurement was carried out using a handy gloss meter gloss checker IG-320 manufactured by Horiba, Ltd. Here, it was determined that there was a woody feeling when the gloss value was 15 or less. -With regard to impact resistance, Charpy impact strength was measured. A sample was cut out from the above molded product to obtain a test piece. The measurement was performed by a method according to JIS-K7111.

Example 1 A vinyl chloride homopolymer (TH-700, manufactured by Taiyo PVC Co., Ltd.) having an average degree of polymerization of 700 was used as a vinyl chloride resin.
1 part by weight of dibutyltin mercapto as a stabilizer, 2.5 parts by weight of a mixture of glycerin monostearate and synthetic polyethylene wax as a lubricant, and polymethyl methacrylate (PMM) as a processing aid.
A) 10 parts by weight, 5 parts by weight of calcium carbonate as a filler, 10 parts by weight of cellulo-spowder (KC Floc W100, manufactured by Nippon Paper Industries Co., Ltd.) having a whiteness of 80% or more, MB
S-based resin (BTA-751 manufactured by Kureha Chemical Industry Co., Ltd.)
15 parts by weight were mixed with a Henschel mixer manufactured by Mitsui Miike Co., Ltd., and the obtained vinyl chloride resin composition was manufactured by Ikegai Iron Works Co., Ltd., having a diameter of 30 mm and a twin screw extruder (PCM-30).
, Set the cylinder and die set temperature from 140 ° C to 1
Pellets were obtained by melt molding at 50 ° C. Using the obtained pellets, flat plate forming was performed by a single-screw full-flight screw extruder (FS-40) manufactured by Ikegai Iron Works Co., Ltd. equipped with a flat plate sizing die, and the flat formed product was obtained. Measured as described above. Table 1 shows the results.

Example 2 A vinyl chloride homopolymer having an average polymerization degree of 1000 (manufactured by Taiyo Vinyl Co., Ltd., TH-100) was used as the vinyl chloride resin.
0) Molding was performed in the same manner as in Example 1 except that 100 parts by weight was used, and each item was measured. Table 1 shows the results.

Example 3 As a vinyl chloride resin, a vinyl chloride graft copolymer having an average degree of polymerization of 1,000 (TA-TAROH, manufactured by Taiyo PVC Co., Ltd.)
E 200) 100 parts by weight and M as impact modifier
Acrylic resin instead of BS resin (Kanebuchi Chemical Industry Co., Ltd.)
Except that 5 parts by weight of FM-20) were used and molded in the same manner as in Example 1 to measure each item. Table 1 shows the results.

Example 4 As a vinyl chloride resin, an ethylene-vinyl chloride copolymer having an average degree of polymerization of 780 (TE-8, manufactured by Taiyo PVC Co., Ltd.)
00) 100 parts by weight, 20 parts by weight of cellulose powder (KC Floc W100, manufactured by Nippon Paper Industries Co., Ltd.), and a silicon-modified acrylic resin (Mitsubishi Rayon (Mitsubishi Rayon) Co., Ltd., S-
Example 2001) was molded in the same manner as in Example 1 except that 15 parts by weight was used, and each item was measured. Table 1 shows the results.

Example 5 MBS resin (Kureha Chemical Industry Co., Ltd.) as an impact modifier
And BTA751), and 10 parts by weight of an acrylic resin (manufactured by Kanegafuchi Chemical Industry Co., Ltd., FM-20), except that 10 parts by weight were used. . Table 1 shows the results.

Example 6 MBS resin (Kureha Chemical Industry Co., Ltd.) as an impact modifier
10 parts by weight of BTA751) and silicon-modified acrylic resin (S-2001, manufactured by Mitsubishi Rayon Co., Ltd.) 5
Except for using parts by weight, molding was performed in the same manner as in Example 1, and each item was measured. Table 1 shows the results.

Comparative Example 1 A molding was carried out in the same manner as in Example 1 except that 0.5 parts by weight of Cellulo-spowder (KC Floc W100 manufactured by Nippon Paper Industries Co., Ltd.) was used, and each item was measured. The gross value, which is an index of the wood texture, was as high as 24.8, and there was no wood texture. Table 2 shows the results.

Comparative Example 2 Molding was carried out in the same manner as in Example 1 except that cellulo-spowder (KC Floc W100, manufactured by Nippon Paper Industries Co., Ltd.) was changed to 45 parts by weight, and each item was measured. The gloss value, which is an index of the woody texture, was low at 4.3 and the woody texture was sufficient, but the Charpy impact strength was low at 3.7 kgf · cm / cm ² and the impact resistance was insufficient. Table 2 shows the results.

Comparative Example 3 Molding was performed in the same manner as in Example 2 except that the MBS resin (BTA-751 manufactured by Kureha Chemical Industry Co., Ltd.) was not used as an impact resistance improver, and each item was measured. The Charpy impact strength was as low as 2.7 kgf · cm / cm ^2, and the impact resistance was insufficient. Table 2 shows the results.

Comparative Example 4 MBS resin (BTA-75 manufactured by Kureha Chemical Industry Co., Ltd.)
1) Molding was performed in the same manner as in Example 1 except that 0.5 parts by weight was used, and each item was measured. The gross value, which is an index of the woody texture, was 5.0, and no improvement in the woody texture was seen. The Charpy impact strength was as low as 3.2 kgf · cm / cm ^2, and no improvement in impact resistance was seen. Table 2 shows the results.

Comparative Example 5 MBS resin (BTA-75 manufactured by Kureha Chemical Industry Co., Ltd.)
1) Except for using 40 parts by weight, molding was performed in the same manner as in Example 1, and each item was measured. Although the impact resistance was sufficient, the woody feel was not improved with the addition amount at a gross value of 4.3, which is an index of the woody feel, and the wood by adding the impact improver MBS-based resin was not observed. The synergistic effect of texture and impact resistance did not appear. In addition, the motor load of the extruder during the molding process was increased, and the drift of the resin appeared, and the shape of the molded product became uneven. Table 2 shows the results.

Comparative Example 6 10 parts by weight of cellulose powder (KC Floc W100, manufactured by Nippon Paper Industries Co., Ltd.) and MBS as an impact modifier
Resin (BTA-751 manufactured by Kureha Chemical Industry Co., Ltd.) 2
Molding was carried out in the same manner as in Example 4 except that 0 parts by weight and 20 parts by weight of a silicon-modified acrylic resin (manufactured by Mitsubishi Rayon Co., Ltd., S-2001) were used, and each item was measured. Although the impact resistance was sufficient, the gross value, which is an index of the woody texture, was 4.3, and no improvement in the woody texture was observed with the addition amount. No synergistic effect of impact resistance appeared. In addition, the motor load of the extruder during the molding process was increased, and the drift of the resin appeared, and the shape of the molded product became uneven. Table 2 shows the results.

[0047]

[Table 1]

[0048]

[Table 2]

[0049]

According to the method of the present invention, the vinyl chloride resin contains cellulose powder and an impact modifier such as MBS resin, acrylic resin and silicone-modified acrylic resin. A vinyl chloride resin composition and a molded article having a synergistic effect and excellent in woody feel and impact resistance can be provided, which is industrially superior.

Claims (2)

[Claims] 1. A method according to claim 1, wherein 1 to 35 parts by weight of cellulose powder having a whiteness of 65 to 95%, 100 parts by weight of vinyl chloride resin, MBS resin, acrylic resin and silicon-modified acrylic resin are used alone or separately. A vinyl chloride resin composition comprising 1 to 30 parts by weight of a mixture of two or more of these and having excellent woody feel and impact resistance. 2. A vinyl chloride resin molded product obtained by melt-molding the vinyl chloride resin composition according to claim 1.