JPH10245461A - Inner window frame of vinyl chloride-based resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an inner window frame of a vinyl chloride-based resin, making a color control easier which happens in the case of using the vinyl chloride-based resin as the inner window frame, less in using amount of a coloring pigment, capable of obtaining a wood grain pattern as a one unit molded product without requiring a laminate specification, simplifying an extrusion process and excellent in impact resistance and feeling of a wood-based material. SOLUTION: This inner window frame of a vinyl chloride-based resin imparted with a wood-based grain pattern and excellent in impact strength, is obtained by melt-molding a vinyl chloride-based resin composition obtained by mixing 100 pts.wt. vinyl chloride-based resin consisting of a vinyl chloride- based graft copolymer formed by graft copolymerizing a copolymer of an alkyl acrylate and/or an alkylmethacrylate with a multi-functional monomer with vinyl chloride, and 1-25 pt.wt. cellulose power having 65-95 degree of whiteness, with 0.1-30 pt.wt. cross-linked vinylchloride-based resin and/or a vinyl chloride- based polymer resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner window frame of a vinyl chloride resin having excellent impact resistance and imparting woody grain.
More specifically, the present invention relates to an inner window frame which is a molded product obtained by melt-molding a vinyl chloride resin composition having good moldability and excellent impact resistance and imparting a woody grain.

[0002]

2. Description of the Related Art Conventionally, in order to obtain a hard synthetic resin molded product, for example, a hard vinyl chloride resin having a woody appearance, a hard synthetic resin molded product containing wood powder has been manufactured. This wood flour is brown wood flour that comes out during wood processing and is called sander flour. When this brown wood flour is added to the hard vinyl chloride resin, the extruded product made of the hard synthetic resin becomes brown, and there is a problem that the color of the natural wood flour is not constant and color management is difficult. In addition, since the above-mentioned hard synthetic resin extruded product is brown, there is a disadvantage that a large amount of pigment is required for coloring. Further, there is also a problem that deterioration of the vinyl chloride resin proceeds due to wood acid generated from wood flour during molding.

As means for solving this problem, Japanese Patent Laid-Open No.
JP 08546 discloses a method of suppressing the release of wood acid by a method in which a white inorganic pigment is supported on the surface of woody powder using a ball mill. However, in this method, it is not possible to suppress wood acid essentially, it is necessary to support white inorganic pigment on wood powder, the number of steps is increased, the processing efficiency is low, and it is not economically suitable. .

Japanese Patent Application Laid-Open No. 8-239538 discloses a method in which a dialkylcarboxylic acid amide compound, a tin compound, or finely divided silica is prepared in advance in wood powder. Even in this method, the acid cannot be suppressed essentially, the number of steps is increased, the treatment efficiency is low, and it is not economically suitable.

[0005] For this reason, it is suitable to use a cellulose powder obtained by treating wood flour or the like with an acid or alkali to remove impurities such as lignin which cause wood acid.

A technique for obtaining an extruded product made of a white hard synthetic resin by incorporating cellulose powder is disclosed in Japanese Patent Publication No. 7-1085.
No. 46 publication. However, according to this method, the amount of wood powder or cellulose powder used is as large as 40 parts by weight, and the impact strength is low, so that it cannot be used for inner window frames and the like. Furthermore, since the amount of cellulose powder added is large, it is necessary to give grain.

[0007] In order to give the grain of the hard synthetic resin molded article, a dark-colored resin (hereinafter, referred to as a seed pellet), which is a grain type, is used for a light-colored resin (hereinafter, referred to as a mother pellet) serving as a base. ) Were mixed through a hopper or vent and mixed at several percent to carry out extrusion molding. However, in the commonly used full flight screw and dalmage type screw, the parent pellet and the seed pellet are mixed,
No grain of extruded product. Further, in a high kneader such as a twin-screw extruder, there is a problem that the base pellet and the seed pellet are completely mixed, and the grain of the extruded product does not appear.

The inner window frame molded product having a wood grain pattern is formed by separating the inner window frame main body and the surface portion from each other, and the wood grain pattern is formed by making the surface portion a laminate specification. However, molding with this laminate specification lacks the depth of the wooden pattern, lacks the warmth and woody feel of natural wood, and requires a laminating specification part attaching step in addition to the extrusion molding of the inner window frame main body part. There were problems that the process became complicated and the extrusion cost increased.

As means for solving this problem, Japanese Patent Application Laid-Open No. 6-2
No. 57351 discloses an inner window frame provided with a woody appearance by extrusion or injection molding of a mixture obtained by mixing a wood powder having a surface subjected to attrition treatment and carrying an inorganic pigment on a resin material, by extrusion or injection molding. Is provided. However, in this method, even if the molding process is improved, it is not possible to suppress the decrease in impact strength due to the addition of woody powder,
Problems remain in the impact strength of the inner window frame molding.

[0010]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the conventional method, simplifies color management, reduces the amount of color pigments used, and eliminates the need for laminate specifications and reduces the grain pattern. A crosslinked vinyl chloride resin that can be obtained as an integrally molded product and can simplify the extrusion process, and has improved grain appearance compared to a vinyl chloride resin composition excellent in impact resistance and woody feel. And / or a vinyl chloride resin composition obtained by melt molding a vinyl chloride resin composition obtained by mixing a vinyl polymer resin composition. I do.

[0011]

Means for Solving the Problems The present inventors have made intensive studies to solve the above problems, and as a result, have reached the present invention. That is, the present invention relates to 100 parts by weight of a vinyl chloride-based graft copolymer obtained by graft copolymerizing vinyl chloride with a copolymer of an alkyl acrylate and / or an alkyl methacrylate and a polyfunctional monomer;
A base pellet made of a vinyl chloride resin excellent in impact resistance and woody feeling containing 1 to 25 parts by weight of cellulose powder of 5 to 100, and a crosslinked vinyl chloride resin and 100 parts by weight of the base pellet, And / or 0.1 to 30 parts by weight of a vinyl polymer resin is mixed as seed pellets, and a vinyl chloride resin composition comprising these base pellets and seed pellets is melt-molded to give a wood-like wood-grained vinyl chloride resin. It is an inner window frame.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The vinyl chloride graft copolymer in the vinyl chloride resin of the present invention is a copolymer of an alkyl acrylate and / or an alkyl methacrylate and a polyfunctional monomer (hereinafter referred to as an acrylic copolymer). The copolymer is graft copolymerized with vinyl chloride. More specifically, it is obtained by graft copolymerizing 99 to 70 parts by weight of vinyl chloride with 1 to 30 parts by weight of an acrylic copolymer.

Here, as the alkyl acrylate and / or alkyl methacrylate in the acrylic copolymer, it is advantageous from the standpoint of improving the impact resistance that the secondary transition point of the acrylate alone is -10 ° C. or less. As specific examples, 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. 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, a water-soluble polymerization catalyst are placed in a jacketed polymerization reactor, air in the can is eliminated, and then alkyl acrylate and / Or charging an alkyl methacrylate and a polyfunctional monomer,
After the emulsification, 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 completion of 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 the suspension polymerization method is performed, pure water, After adding a suspension stabilizer such as hydroxypropylmethylcellulose, a radical polymerization initiator, and if necessary, a polymerization degree reducing agent, 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.

Next, after the air in the can is removed, 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. Among the raw materials such as pure water, suspension stabilizer, acrylic copolymer, and vinyl chloride, the acrylic copolymer may be used. Is dissolved in vinyl chloride and charged. 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.

Examples of the vinyl chloride graft copolymer used in the present invention include commercially available TA-I 200, TA-I 100, and TA-E manufactured by Taiyo Vinyl Co., Ltd.
200, TA-E 230 and the like can be used, and the degree of polymerization is 500, 700, 1000, and 1300, respectively.

The degree of polymerization of the vinyl chloride resin thus obtained is usually about 500 to 1500, preferably 800 to 1300, more preferably 900 to 11
00. If the degree of polymerization is less than 500, the strength is insufficient, and if it exceeds 1500, the moldability decreases,
In addition, a high-viscosity region is formed, and grain does not appear.

The cellulose powder used in the present invention includes commercially available whiteness of 65 to 95 (JIS P8).
123-61), for example, KC Floc W manufactured by Nippon Paper Industries Co., Ltd.
KC with 100 or 200 mesh pass granularity
Flock W200 is preferred. It is also possible to use a cellulose powder that has been subjected to a terminal acetylation treatment, surface treatment of acrylic, silicon, or the like. In particular, since this cellulose powder is a white fine powder, it can be freely toned with a pigment or the like.

The number of parts of cellulose powder added to give the woody feel by the appearance and feel of the woody feel is as follows:
1 to 100 parts by weight of the vinyl chloride graft copolymer
To 25 parts by weight, preferably 3 to 15 parts by weight, more preferably 5 to 10 parts by weight. Further, cellulose powder is tightly entangled with PVC chains as compared with conventional wood flour, and is superior in strength, and is particularly effective for molded articles requiring strength such as inner window frames. If the number of added parts is less than 1 part by weight, the feeling of wood having a rough surface due to touch is small, and if it exceeds 25 parts by weight, the impact strength is reduced, and it cannot be used as an inner window frame molded product.

In the present invention, polymerization of a crosslinked vinyl chloride resin in a crosslinked vinyl chloride resin and / or a vinyl polymer resin which is a seed pellet containing a dark color pigment which is also used for imparting a grain to a base pellet. The degree is usually about 400 to 6000, preferably 60
0 to 3000, more preferably 700 to 130.
0. The higher the degree of polymerization, the higher the melt viscosity during molding, and the base pellets and the seed pellets are not mixed, and the grain of the extruded product made of the dark pigment is developed.

Examples of the crosslinked vinyl chloride resin in the present invention include commercially available SD7 manufactured by Chisso Corporation.
E, SD10E, SD13E and T made by Taiyo PVC Co., Ltd.
U-300, TU-400 and the like can be used, and their degree of polymerization is 700, 1000, 1300, 3 respectively.
4,000.

The vinyl polymer resin may be any polymer resin which does not impair the effects of the present invention. However, except for vinyl chloride homopolymer, styrene, α-methyl styrene,
aromatic compounds such as p-methylstyrene and pt-butylstyrene, chlorinated vinyl chloride, methyl methacrylate,
Examples thereof include polymers such as methacrylic acid or an alkyl ester of acrylic acid such as methyl acrylate, unsaturated nitriles such as acrylonitrile and methacrylonitrile, maleimide, N-maleimide, and Nt-butylmaleimide. These are not limited to one type, and two or more types may be used simultaneously.

The mixing ratio of the seed pellets is such that the crosslinked vinyl chloride resin / vinyl polymer resin is 100/0 to 0/10
0% by weight, preferably 100/0 to 50/50% by weight. The amount of the pellets used is 0.1 to 30 parts by weight based on 100 parts by weight of the vinyl chloride resin.
Parts by weight, preferably 0.5 to 20 parts by weight,
More preferably, it is 1 to 10 parts by weight. When the amount is less than 0.1 part by weight, the grain does not clearly appear. When the amount exceeds 30 parts by weight, the grain overlaps and the grain which is added does not appear.

In the present invention, the vinyl chloride resin composition obtained by the method described below may be used in combination with other generally used stabilizers, lubricants, plasticizers, processing aids, antioxidants,
V absorbers, pigments, fillers, and the like can be used as needed.

The stabilizer used herein may be any of known ones, and examples thereof include inorganic acid salts, metal soaps, organometallic compounds, and organic compounds. As a lubricant,
Any of a hydrocarbon type, a fatty acid type, an ester type, a metal soap type, a fatty alcohol type, a polyhydric alcohol type and the like, or a mixed type may be used. As the plasticizer, phthalic acid type, epoxy type, polyester type, chlorinated paraffin type and the like are used. The processing aid may be any of known ones, for example, polymethyl methacrylate. As the pigment, any of known pigments may be used, for example, titanium oxide, red iron oxide, graphite, carbon black, etc., among which titanium oxide is mainly used.

The filler may be any of known ones, for example, calcium carbonate, clay, hydrated silicic acid, anhydrous silicic acid, calcium silicate, aluminum silicate asbestos powder, antimony oxide, talc, aluminum trihydrate, hydrated boric acid Zinc, magnesia, baking soda, nitric acid potassium, calcium hydroxide, mica, synthetic fluoromica and the like are preferable, and calcium carbonate is particularly preferably used. As described above, generally used additives are easily available on the market, are often used, and can be used as needed.

As a method for obtaining the vinyl chloride resin composition of the present invention, the above-mentioned vinyl chloride resin, crosslinked vinyl chloride resin and / or vinyl polymer resin may be added to a stabilizer, a lubricant and, if necessary, Other additives and fillers are added, and the mixture is stirred and compounded by a stirrer such as a Henschel mixer, a Banbury mixer, and a ribbon blender, and the obtained compounded powder is subjected to, for example, a conical twin-screw extruder, a parallel twin-screw extruder Can be obtained as pellets granulated by a kneader such as a single screw extruder, a kneader type kneader or a roll kneader.

The above-obtained pellets are melt-molded by an extruder such as a conical twin-screw extruder, a parallel twin-screw extruder, a single-screw extruder, etc. to obtain a molded product of an inner window frame. .

The inner window frame molded product includes a method of extruding the upper stile, the lower stile, and the vertical stitch separately and assembling each stile with a screw or the like, or a method of assembling each stitch by welding. When extruding each stile, for example, a 65 mmφ single screw extruder or a 50 mmφ twin screw extruder with L / D = 22 is used, each cylinder set temperature is set to 130 ° C. to 175 ° C., adapter and die are set. The reaction can be performed at a temperature of 170 ° C to 190 ° C.

Also, a method of forming a wood pattern by extrusion molding is as follows.
It is necessary to add a high-viscosity dark-colored seed pellet (seed pellet) to the base pellet, which is a vinyl chloride-based resin composition containing cellulose powder, for imparting grain. The seed pellets may be mixed with the base pellets in advance and then charged through the hopper port, or only the seed pellets may be charged after the vent port.

When a wood-grain-like molded product is extruded, the wood-grain-imparting seed pellets do not sufficiently melt in the base pellet, resulting in uneven coloring with a dark pigment. Since the dark portion due to the unevenness flows in parallel with the extrusion direction, the grain can be made very close to a natural grain.

[0035]

EXAMPLES The present invention will be described more specifically with reference to the following examples. 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 pellets shown in Tables 1 and 2 were used as the compounds shown in Tables 3 and 4 by using a Labo Plastomill conical twin screw extruder 2D-20C manufactured by Toyo Seiki Seisaku-sho, Ltd. Die (W = 40mm, H =
1 mm, L = 60 mm), the cylinder temperature is set to 140 to 160 ° C., the die temperature is set to 180 ° C., and the width is set to 4 mm.
A flat molded product having a thickness of 0 mm and a thickness of 1 mm was obtained. Using this molded product, gloss, molding processability, and grain were evaluated as indices of wood texture and wood grain.

The gloss was evaluated by measuring the gloss of the surface of the molded article using the above flat molded article as an index for evaluating the feeling of wood. For the measurement, a handy gloss meter gloss checker IG-320 manufactured by Horiba, Ltd. was used. Here, it was determined that there was a woody feeling when the gloss value was 50 or less. -Regarding the moldability, it was determined that the moldability was poor when the torque and the resin pressure during molding were high, and that the moldability was poor even when the drift of the resin flow was large and the shape of the molded product became uneven. The workability was comprehensively determined and the ranking was performed as follows. ○ mark: good enough, △ mark: slightly good, ×
Mark: Bad. -Regarding the appearance of grain, the surface was observed using the above-described flat molded product. If wood grain appears, wood grain streaks appear,
The grain was determined based on the appearance and shading of the streaks. Judging comprehensively, it was ranked as follows.印: Wood grain is sufficiently developed. Δ: Wood grain is slightly developed. X: Wood grain does not appear.

With regard to the impact resistance, JI for inner window frame molding was used.
As S standard, there is JIS-K6785, and measurement was performed by a method according to this standard, and it was evaluated whether or not the physical properties for inner window frames in the present invention were cleared.
The impact strength and weather resistance as specified for the inner window frame are as follows. Impact strength: Charpy impact strength at standard temperature (23 ° C.) is 10 kgf · cm / cm ² or more. -10
Charpy impact strength at 4 ° C. is 4 kgf · cm / cm ² or more. -Weather resistance: The sample after the accelerated exposure test for 500 hours,
Charpy impact strength at standard temperature is 7kgf · cm / c
m ² or more, and the discoloration and discoloration do not significantly change.

With respect to the impact resistance, pellets shown in Tables 1 and 2 were used as compounds shown in Tables 3 and 4,
Perform roll kneading at a roll surface temperature of 160 ° C. with a Yasuda Seiki Seisakusho steam-water-cooled twin roll 191-WM type.
Further, a 3 mm-thick press sheet was formed at a press temperature of 180 ° C. using an ASFA150-type compression molding machine manufactured by Shinto Metal Industry Co., Ltd., and used as a Charpy impact strength measurement sample for impact resistance evaluation.

The Charpy impact strength at room temperature was measured according to JIS-K67 using the above sample as a test piece.
The reaction was carried out at 23 ° C. according to the method described in No. 85. With respect to the low-temperature Charpy impact strength, the above-mentioned sample was used as a test piece, and the measurement was performed at −20 ° C. by a method according to JIS-K6785. Regarding the weather resistance, the pellets shown in Tables 1 and 2 were used as the compounds shown in Tables 3 and 4, and the test pieces for measuring the Charpy impact strength were used as they were in the same manner as the impact resistance described above. Was evaluated for impact strength.

With respect to the impact strength after the weathering test, the above-mentioned sample was used as a test piece, and a sunshine super long life weather meter WEL- manufactured by Suga Test Instruments Co., Ltd. was used.
SUN-HC-B (using sunshine carbon arc)
The accelerated exposure test was performed for 500 hours under the conditions of black panel temperature of 63 ° C. and spray water spraying every 120 minutes for 18 minutes, and then the impact strength was measured by a method according to JIS-K6785.

Example 1 One-pack additive of a lead-based stabilizer and a composite lubricant in 100 parts by weight of a vinyl chloride-based graft copolymer having an average degree of polymerization of 1000 (TA-E200, manufactured by Taiyo Vinyl Co., Ltd.) (S-6021-1, manufactured by Mizusawa Chemical Industry Co., Ltd.) 6.5 parts by weight, calcium carbonate 5 parts by weight as a filler, whiteness 80 /
White cellulose powder (KC, manufactured by Nippon Paper Industries Co., Ltd.)
10 parts by weight of Flock W-100) and 1 part by weight of a light brown pigment as a pigment are mixed with a Henschel mixer manufactured by Mitsui Miike Co., Ltd., and the obtained composition is manufactured by Placo Co., Ltd., and has a caliber of 3
Granulation was performed with a 0 mm single screw full flight screw extruder to obtain a base pellet. The composition is shown in Table 1 (see also the following Examples and Comparative Examples).

On the other hand, as a crosslinked vinyl chloride resin and / or a vinyl polymer resin, a crosslinked vinyl chloride resin having an average degree of polymerization of 1,000 (SD10E, manufactured by Chisso Corporation)
, A lead-based stabilizer, a composite lubricant, as in the case of the vinyl chloride-based graft copolymer, except that the pigment was replaced with 4 parts by weight of a dark brown pigment.
Calcium carbonate and the like were mixed and granulated to obtain seed pellets. The composition is shown in Table 2 (see also the following Examples and Comparative Examples).

3 parts by weight of seed pellets were mixed with 100 parts by weight of the base pellet, and a Labo Plast Mill conical twin screw extruder 2D-20C manufactured by Toyo Seiki Seisaku-sho, Ltd. was used. (W = 40 mm, H =
1 mm, L = 60 mm), the cylinder temperature is set to 140 to 160 ° C., the die temperature is set to 180 ° C., and the width is set to 4 mm.
A flat molded product having a thickness of 0 mm and a thickness of 1 mm was obtained. The flat molded product was evaluated for imparting woody grain as described above.
Also, mix the mother pellet and seed pellet in the same way,
A 3 mm-thick sheet was formed by a roll kneader and a press machine. Charpy impact strength was measured using a Charpy test piece prepared from this sheet, and a weathering test was performed using a similar test piece. No significant discoloration was observed, and then the Charpy impact strength was measured. did. Table 3 shows the results.

Example 2 A pellet was molded and measured in the same manner as in Example 1 except that the cellulose powder in the base pellet was changed to 3 parts by weight. Table 3 shows the results.

Example 3 Molding was performed in the same manner as in Example 1 except that the cellulose powder of the base pellet was changed to 20 parts by weight, and the measurement was carried out.
Table 3 shows the results.

Example 4 The seed pellets were molded and measured in the same manner as in Example 1 except that 5 parts by weight of a crosslinked vinyl chloride resin having an average polymerization degree of 700 was used. Table 3 shows the results.

Example 5 A pellet was molded and measured in the same manner as in Example 1 except that a crosslinked vinyl chloride resin having an average degree of polymerization of 1300 was used as the seed pellet. Table 3 shows the results.

Example 6 As seed pellets, acrylonitrile 20% by weight, α-
Replacement with seed pellets obtained by adding 4 parts by weight of a dark brown pigment to 100 parts by weight of a vinyl polymer resin (S802N, manufactured by Ube Sicon Co., Ltd.) comprising 70% by weight of methylstyrene and 10% by weight of N-phenylmaleimide Other than that, it was molded and measured in the same manner as in Example 1. Table 3 shows the results.

Example 7 A mother pellet was molded and measured in the same manner as in Example 1 except that a vinyl chloride graft copolymer having an average polymerization degree of 700 was used. Table 3 shows the results.

Example 8 The same procedure as in Example 1 was carried out except that the base pellets were replaced with a vinyl chloride graft copolymer having an average degree of polymerization of 1300, and measurement was carried out. Table 3 shows the results.

Example 9 Molding was performed in the same manner as in Example 1 except that the amount of the seed pellet was changed to 0.3 part by weight with respect to the base pellet, and the measurement was performed. Table 3 shows the results.

Example 10 Molding was performed in the same manner as in Example 1 except that the amount of the seed pellet added to the base pellet was changed to 1 part by weight, and measurement was performed. Table 3 shows the results.

Example 11 Molding and measurement were carried out in the same manner as in Example 1 except that the amount of the seed pellets was changed to 10 parts by weight with respect to the base pellets. Table 3 shows the results.

Example 12 Molding was performed in the same manner as in Example 1 except that the amount of the seed pellet added to the base pellet was changed to 25 parts by weight, and measurement was performed. Table 3 shows the results.

Comparative Example 1 Molding was carried out in the same manner as in Example 1 except that the cellulose pellets were not used in the base pellets, and the molding was performed. The measurement showed that the moldability, grain appearance, and Charpy impact strength were good. The gloss value was as high as 59, and there was no woody feeling. Table 4 shows the results.

Comparative Example 2 Cellulose powder of the base pellet was changed to 30 parts by weight.
Other than that, it was molded and measured in the same manner as in Example 1.
The gloss, moldability and grain appearance were good, but Charpy
Impact strength is 7.1kgf · cm / cm at 23 ° C^Two, −
5.7 kgf · cm / cm at 20 ° C measurement^Two, Weathering test 5
6.6 kgf · cm / cm after 00 hours ^TwoAnd low, anti-impact
Habitability was insufficient. Table 4 shows the results.

Comparative Example 3 The procedure of Example 1 was repeated except that the base pellets were replaced with a vinyl chloride graft copolymer having an average degree of polymerization of 1700, and the measurements were taken. High torque during molding,
The drift was large and the shape of the molded product was uneven. Furthermore, no grain was expressed. Table 4 shows the results.

Comparative Example 4 A vinyl chloride homopolymer (TH-1000, manufactured by Taiyo Vinyl Co., Ltd.) having an average degree of polymerization of 1000 was used as a base pellet, and an acrylic rubber (manufactured by Kanegafuchi Chemical Industry Co., Ltd.) was used. And Kaneace FM-21) were molded and measured in the same manner as in Example 1, except that 10 parts by weight were added. The torque during molding was high, the drift was large, and the shape of the molded product was uneven. Also, almost no grain was expressed. 5. Charpy impact strength measured at 23 ° C.
9 kgf · cm / cm ² , measured at -20 ° C, 5.2 kgf
・ Cm / cm ² , 6.2 kgf after 500 hours of weathering test
· Cm / cm ² and low impact resistance was insufficient. Table 4 shows the results.

Comparative Example 5 A vinyl chloride homopolymer (TH-1000, manufactured by Taiyo Vinyl Co., Ltd.) having an average degree of polymerization of 1000 was used as a base pellet, and a silicone-acrylic rubber (manufactured by Mitsubishi Rayon Co., Ltd.) was used. S-2001) Molding and measurement were performed in the same manner as in Example 1 except that 5 parts by weight were replaced. The torque during molding was high, the drift was large, and the shape of the molded product was uneven. Also, almost no grain was expressed. Charpy impact strength measured at 23 ° C. is 4.1.
kgf · cm / cm ² , measured at −20 ° C., 2.8 kgf · cm / cm ²
cm / cm ² , 3.7 kgf ·
cm / cm ^2, and the impact resistance was insufficient. Table 4 shows the results.

Comparative Example 6 Vinyl chloride homopolymer having an average degree of polymerization of 1000 (manufactured by Taiyo PVC Co., Ltd., TH-1000) was used as a base pellet, and silicon-acryl rubber (manufactured by Mitsubishi Rayon Co., Ltd.) was used. S-2001) Molding was carried out in the same manner as in Example 1 except that 15 parts by weight were added, and measurement was carried out. The torque during molding was high, the drift was large, and the shape of the molded product was uneven. In addition, the grain did not develop much. Charpy impact strength is 9.6 measured at 23 ° C.
kgf · cm / cm ² , and the impact resistance was insufficient. Table 4 shows the results.

Comparative Example 7 The same method as in Example 1 was used except that a vinyl chloride homopolymer having an average degree of polymerization of 700 (manufactured by Taiyo Vinyl Co., Ltd., TH-700) was used as a seed pellet, and measurement was performed. did.
The gloss, moldability, Charpy impact strength, and weather resistance were good, but no grain appeared. Table 4 shows the results.

Comparative Example 8 The procedure of Example 1 was repeated, except that the amount of the seed pellet was changed to 0.05 part by weight with respect to the base pellet.
It was measured. The grain did not appear clearly, and it could not be judged as a grain pattern. Table 4 shows the results.

Comparative Example 9 A molding was performed in the same manner as in Example 1 except that the amount of the seed pellet added to the base pellet was changed to 35 parts by weight, followed by measurement. The wood grain overlapped and could not be judged as a wood grain pattern.
Table 4 shows the results.

[0065]

[Table 1]

[0066]

[Table 2]

[0067]

[Table 3]

[0068]

[Table 4]

[0069]

According to the present invention, there is provided a vinyl chloride resin inner window frame which is suitable for use as an inner window frame having a wood-like grain and has excellent physical properties such as wood texture, grain imparting, impact resistance and weather resistance. It is a very industrial advantage.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takeshi Ohira 1-6-6 Takasago, Takaishi-shi, Osaka Mitsui Toatsu Chemicals Co., Ltd.

Claims (1)

[Claims] 1. A vinyl chloride graft copolymer obtained by graft copolymerizing vinyl chloride onto a copolymer of an alkyl acrylate and / or an alkyl methacrylate and a polyfunctional monomer, and a whiteness of 65%. 100 to 100 parts by weight of a vinyl chloride-based resin consisting of 1 to 25 parts by weight of a cellulose powder which is 95 to 95%, and 0.1 to 30 parts by weight of a crosslinked vinyl chloride-based resin and / or a vinyl-based polymer resin. An inner window frame of a vinyl chloride resin having a woody grain with excellent impact resistance obtained by melt-molding a vinyl chloride resin composition.