JP2000169661A - Vertical trough - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vertical trough that has excellent stretchability and causes no damage of the trough by freeze expansion of rain water during the winter. SOLUTION: The objective vertical trough is produced by molding the starting material selected from (A1) a graft copolymer by 90-10 wt.% of vinyl chloride onto 10-30 wt.% of an elastomer, (B1) a blend polymer from 10-30 wt.% of an elastomer and 90-70 wt.% of vinyl chloride resin, (C1) a blend polymer from the graft polymer prepared by grafting vinyl chloride onto the elastomer and from the vinyl chloride resin where the amount of the elastomer is 10-30 wt.%, (D1) a blend polymer comprising a graft copolymer grafted with vinyl chloride onto the elastomer and an elastomer that is the same as or different from the elastomer in the graft copolymer where the content of the elastomer is 10-30 wt.% and (E1) a blend polymer comprising a graft copolymer grafted with vinyl chloride onto the elastomer, a vinyl chloride resin and an elastomer that is the same as or different from the elastomer in the graft copolymer where the content of the elastomer is 10-30 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION

[0001] The present invention relates to a downspout, and more particularly to a downspout in which rainwater freezes in a rain gutter in winter and does not break even if expanded in the rain gutter.

[0002]

2. Description of the Related Art Conventionally, as a downspout, one manufactured from a homopolymer resin of vinyl chloride is usually used.

On the other hand, when water becomes ice, its volume is about 1.
In cold regions, etc., water droplets attached to a pit, etc., gradually grow to expand by a factor of 1, and when the pit is closed, the pressure increases due to volume expansion, so the strength is relatively low and the stretchability is poor. The above-mentioned downspout made of vinyl chloride resin has a problem that cracks or breakage occur.

In order to solve such a problem, for example, Japanese Patent Publication No. 6-35747 discloses a method in which an elastic rod made of a foam is inserted into a rain gutter, and when the rainwater freezes and expands, the pressure is increased. A technique has been proposed in which the body gutter absorbs and shrinks and diverts the pressure away from the gutter to prevent breakage of the gutter.

[0005] Specifically, as shown in Fig. 1, an elbow joint 2, an exhalation gutter 3 and a downspout 4 are connected to a water collector 1 to form a downspout main body 6, and a polyethylene foam is formed. At least at the upper end of the rod-shaped expansion absorbing member 5 made of an elastic member such as
The locking member 7 and the rod-shaped expansion absorbing member 5 are inserted into the gutter main body 6, and the rod-shaped expansion absorbing member 5 is arranged by the locking member 7 so as to be located substantially at the center of the gutter main body 6. The stopper 7 is bonded and fixed to the lower end of the outlet of the water collector 1 and, for example, the lower end of the downspout 4.

That is, in this downspout apparatus, the rod-shaped expansion absorbing member 5 is inserted into the downspout main body 6 and arranged at the center of the downspout main body 6, so that the expansion caused by freezing of rainwater is prevented by the rod-shaped expansion absorbing member 5. By absorbing, it prevents pressure rise in the downspout main body 6,
The gutter main body 6 is prevented from bursting.

However, in this downspout apparatus, since a substantially straight rod-shaped expansion absorbing member is inserted into the downspout main body, it may be held at the bent portion when the rod-shaped expansion absorbing member is passed through the downpipe main body having a bent portion. Therefore, there is a problem that it is difficult to insert the rod-shaped body and it takes time to insert the rod-shaped body.

[0008]

Further, when actually examining the downspout described in the above publication, the method of fixing the rod-shaped expansion absorbing member is as follows. Inserting and locking, the adhesive is applied to the outer peripheral surface of this locking tool, and it is fitted and fixed to the upper end of the downspout main body. It is not always the case that it is always good, so it has been found that there is a problem that the stick-shaped expansion absorbing member and the locking tool often peel off from the upper end of the downspout main body because they can not be firmly fixed with the locking tool did.

Therefore, the present invention does not use such a rod-shaped expansion absorbing member having low workability at the time of mounting, and makes the downspout itself elastic so that it does not burst even by freezing and expansion of rainwater. It aims to provide a downspout.

[0010]

Means for Solving the Problems To achieve the above object, the present invention according to claim 1 is directed to a graft (A) in which a vinyl chloride monomer is graft-polymerized on an elastomer, and a graft product (A) comprising an elastomer and a vinyl chloride resin. Blend (B),
A blend (C) of the graft (A) with a vinyl chloride resin, a blend (D) of the graft (A) with the same or a different elastomer from the elastomer, and the graft (A). A downpipe characterized by being formed from any of raw materials of a blend (E) of a vinyl chloride resin and the same or different elastomer with the elastomer.

According to a second aspect of the present invention, in the downspout, the graft (A1) is obtained by graft-polymerizing a vinyl chloride monomer in an amount of from 90 to 70% by weight to an elastomer in an amount of from 10 to 30% by weight. (B1), a blend (C1) of the above blend (C), which is composed of 10 to 30% by weight of an elastomer, and a blend (D) of the above (B).
And a blend (D1) composed of 10 to 30% by weight of an elastomer and a blend (E1) composed of 10 to 30% by weight of the elastomer (E). The downspout according to claim 1, wherein the downspout is formed.

The present invention according to claim 3, wherein the elastomer is an ethylene-vinyl acetate copolymer, an ethylene- (meth) acrylate copolymer, an acrylonitrile-butadiene copolymer, a chlorinated polyethylene, The methacrylic acid ester-based copolymer, methyl methacrylate-styrene-butadiene copolymer, chlorosulfonated polyethylene, and polyurethane are selected from the group consisting of one or more. The described downspout is provided. Hereinafter, the present invention will be described in more detail.

In the present invention, the vinyl chloride resin which is blended with the elastomer to constitute the above-mentioned blend (B) or which is blended with the above-mentioned graft (A) to constitute the above-mentioned blend (C) is particularly limited. Examples thereof include a homopolymer of vinyl chloride and a copolymer of a monomer mixture containing vinyl chloride as a main component and copolymerizable with vinyl chloride.

Examples of the monomers copolymerizable with vinyl chloride include α-olefins such as ethylene, propylene and butylene; vinyl esters such as vinyl acetate and vinyl propionate; vinyl ethers such as ethyl vinyl ether and butyl vinyl ether. Acrylates such as methyl acrylate, butyl acrylate, hydroxyethyl acrylate; methacrylates such as methyl methacrylate, butyl methacrylate, hydroxyethyl methacrylate; aromatic vinyls such as styrene and α-methyl styrene; vinyl fluoride; Vinyl halides such as vinylidene fluoride and vinylidene chloride; and N-substituted maleimides such as N-phenylmaleimide and N-cyclohexylmaleimide. These may be used alone or in combination of two or more.

The content of the monomer copolymerizable with vinyl chloride is appropriately used depending on the purpose, but is preferably 20% by weight or less in the vinyl chloride resin. If the content exceeds 20% by weight, the intrinsic properties of the vinyl chloride resin will be lost.

The degree of polymerization of the vinyl chloride resin is 400
~ 2500, more preferably 600 ~ 160
0. If the degree of polymerization is less than 400, the durability will be poor. If the degree of polymerization exceeds 2500, the melt viscosity of the resin will increase and the moldability will deteriorate.

In the present invention, if the amount of the vinyl chloride component in the raw material is too large, the elongation of the downspout at a low temperature is insufficient, so that it cannot follow the volume expansion due to the freezing of water, and cracks or breakage easily occur. Claim 2 because if the amount of vinyl chloride is too small, sufficient strength cannot be obtained and there is a possibility of causing a problem in workability as a downspout.
It is preferable to set it as the range described in.

For example, in the case of a graft (A) in which a vinyl chloride monomer is graft-polymerized on an elastomer, a graft (A1) in which a vinyl chloride monomer is graft-polymerized by 90 to 70% by weight is suitably employed.

The term "elastomer" as used herein generally refers to a polymer material having flexibility at room temperature, and is not particularly limited. For example, ethylene-acetic acid as described in claim 3 Vinyl copolymer (hereinafter EVA), ethylene- (meth) acrylate copolymer (E
A), acrylonitrile-butadiene copolymer (NB
R), chlorinated polyethylene (CPE), (meth) acrylate copolymer (AC), methyl methacrylate-styrene-butadiene copolymer (MBS), chlorosulfonated polyethylene (CSPE) and polyurethane (PU) ) Is preferably one selected from the group consisting of:

As the above-mentioned EVA, for example, a melt flow rate (MFR) of 0.5 to 10% by weight according to JIS K 6760 and a vinyl acetate content of 10 to 80% by weight is used.
300 and the like.

As the EA, for example, the type of acrylate is ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, etc., the content of acrylate is 10 to 80% by weight, and the MFR value is 0.1%.
1 to 100 and the like.

As the above-mentioned NBR, for example, the content of acrylonitrile is 20 to 50% by weight, and the Mooney viscosity (M
(L1 + 4: 100 ° C.) of 10 to 200. As the above CPE, for example, the chlorination degree is 20 to
55% by weight and MFR value of 0.1 to 100.

The above-mentioned AC is, for example, as an acrylate ester, a glass transition temperature (Tg) of a homopolymer.
Is a polymer mainly composed of monomers such as ethyl acrylate, n-propyl acrylate, butyl acrylate, hexyl acrylate and 2-ethylhexyl acrylate having a temperature of −20 ° C. or lower, and a high Tg monomer such as methyl methacrylate is multi-layered by copolymerization or multi-stage polymerization. And those having a crosslinked structure using a difunctional or higher-functional monomer. The average particle size is not particularly limited, and generally includes a particle having a size of 0.01 to 5 μm.

Examples of the MBS include those having a butadiene component of 50 to 90% by weight, a methyl methacrylate component of 5 to 45% by weight, and a styrene component of 5 to 45% by weight. The average particle size is not particularly limited, and generally includes a particle having a size of 0.01 to 5 μm.

The above CSPE has, for example, a chlorine content of 20 to 50% by weight and a sulfur content of 0.5 to 2.0%.
Weight%, Mooney viscosity (ML1 + 4: 100 ° C) is 10
To 200 and the like.

Examples of the PU include those obtained by reacting a polyfunctional active hydrogen compound such as a polyol with an isocyanate compound in a whole reaction system to form a linear polymer or a partially crosslinked structure. Examples thereof include those of caprolactone type, adipate type, ether type and the like.

In the present invention, if the proportion of the elastomer in the raw material is too small, the elongation of the downspout at a low temperature is insufficient, so that it cannot follow the volume expansion due to the freezing of water, and cracks or breakage easily occur. If the proportion of the elastomer is too large, sufficient strength cannot be obtained and there is a possibility of causing a problem in workability as a downspout, so that the range described in claim 2 is preferable.

For example, in the case of the graft (A) in which a vinyl chloride monomer is graft-polymerized on an elastomer, the graft (A) having an elastomer content of 10 to 30% by weight is used.
1) is preferably adopted. Also in the blends (B) to (E), the blends (B1) to (E1) composed of 10 to 30% by weight of the elastomer are preferably used.

The graft copolymerization of the above-mentioned elastomer and the above-mentioned vinyl monomer can be carried out according to a conventional method. For example, a suspension polymerization method, an emulsion polymerization method, a solution polymerization method and the like can be mentioned, but a suspension polymerization method is generally used.

In the above suspension polymerization method, a dispersant, a polymerization initiator and the like are used. The dispersant is not particularly restricted but includes, for example, methylcellulose, ethylcellulose, hydroxypropylmethylcellulose, polyvinyl alcohol and partially saponified products thereof, gelatin, polyvinylpyrrolidone, starch, maleic anhydride-styrene copolymer and the like. These may be used alone or in combination of two or more.

The above-mentioned polymerization initiator is not particularly limited.
For example, organic peroxides such as lauroyl peroxide, t-butyl peroxypivalate, diisopropyl peroxy dicarbonate, dioctyl peroxy dicarbonate, t-butyl peroxy neodecanoate, α-cumyl peroxy neodecanoate, etc. Class; 2,2-
Azobisisobutyronitrile, 2,2-azobis-2,
An azo compound such as 4-dimethylvaleronitrile and the like can be mentioned. If necessary, a pH adjuster, an antioxidant and the like may be added.

Specifically, for example, the following method is used for the above suspension polymerization method. That is, pure water, a dispersant, a polymerization initiator, and an elastomer are charged into a polymerization vessel equipped with a temperature controller and a stirrer, and air is removed from the polymerization vessel by a vacuum pump, and then vinyl chloride is introduced into the polymerization vessel. After the elastomer is dispersed or dissolved in vinyl chloride, the temperature is raised to initiate polymerization at a desired polymerization temperature. After completion of the reaction, the remaining monomer is discharged out of the polymerization vessel to obtain a slurry. After dehydration with a dehydrator, drying is performed to obtain a vinyl chloride resin. The downspout of the present invention may further comprise, as necessary, a stabilizer, a stabilizing aid, a lubricant, a processing aid, an ultraviolet absorber, a light stabilizer, and an antioxidant in the vinyl chloride resin obtained by the above method. And a compounding agent such as a pigment and a filler.

The stabilizer is not particularly restricted but includes, for example, dimethyltin mercapto, dibutyltin mercapto, dioctyltin mercapto, dibutyltin malate, dibutyltin maleate polymer, dioctyltin malate, dioctyltin maleate polymer, dibutyltin laurate , Organic tin-based stabilizers such as dibutyltin laurate polymer; lead white, basic lead sulfite, dibasic lead sulfite, tribasic lead sulfite,
Dibasic lead phosphate, tribasic lead sulfate, lead stearate,
Lead-based stabilizers such as lead benzoate, dibasic lead stearate, and lead naphthenate; metal soaps such as calcium stearate, barium stearate, and zinc stearate; calcium-zinc-based stabilizer, barium-zinc-based stabilizer; Hydrotalcite, zeolite and the like can be mentioned. These may be used alone or in combination of two or more. However, when a stabilizer containing a mercapto group and a lead compound are used in combination, a sulfide is generated by the reaction and the obtained molded product is contaminated, so that care must be taken.

The stabilizing aid is not particularly limited.
For example, epoxidized soybean oil, epoxidized linseed oil, epoxidized tetrahydrophthalate, epoxidized polybutadiene, phosphate ester and the like can be mentioned. These may be used alone or in combination of two or more.

The lubricant is not particularly restricted but includes, for example, montanic acid wax, paraffin wax, polyethylene wax, stearic acid, stearyl alcohol, butyl stearate and the like. These may be used alone or in combination of two or more.

The processing aid is not particularly limited, and examples thereof include (meth) acrylates such as methyl (meth) acrylate, ethyl (meth) acrylate, and butyl (meth) acrylate.
Acrylate homopolymer; copolymer of two or more monomers selected from the above (meth) acrylate homopolymers; copolymer of (meth) acrylate with vinyl monomers such as styrene, vinyltoluene and acrylonitrile Is mentioned.

The ultraviolet absorber is not particularly limited, and examples thereof include cyanoacrylate-based ultraviolet absorbers. The light stabilizer is not particularly limited, for example,
Hindered amine light stabilizers and the like can be mentioned. The antioxidant is not particularly restricted but includes, for example, phenolic antioxidants.

The above-mentioned plasticizer is added for the purpose of improving workability at the time of molding.
And aromatic esters such as dioctyl terephthalate.

The above-mentioned pigments are not particularly restricted but include, for example, organic pigments such as azo, phthalocyanine, sulene and dye lakes; oxides, molybdenum chromates, sulfides / selenides, ferrocyanides. And other inorganic pigments.

The filler is not particularly restricted but includes, for example, silica, diatomaceous earth, alumina, zinc oxide, titanium oxide, calcium oxide, magnesium oxide, iron oxide, tin oxide, antimony oxide, ferrites, calcium hydroxide, water Magnesium oxide, aluminum hydroxide, basic magnesium carbonate, calcium carbonate, magnesium carbonate, zinc carbonate, barium carbonate, dawsonite, hydrotalcite, calcium sulfate, barium sulfate, calcium silicate, talc, clay, mica, montmorillonite, bentonite, Activated clay, zepiolite, imogolite, sericite, glass fiber, aluminum nitride, boron nitride, silicon nitride, carbon black, graphite, carbon fiber, charcoal powder, various metal powders, magnesium sulfate, molybdenum sulfide, carbonized Lee arsenide, stainless steel fiber, zinc borate, various magnetic powder, slag fibers, fly ash, and the like. The amounts of these additives can be arbitrarily selected within a range that does not impair the object of the present invention.

The order and method of mixing the above various additives into the above vinyl chloride resin composition are not particularly limited, and any method can be adopted.
The method by cold blending may be used. In the production process of the vinyl chloride resin composition of the present invention, as a device used for mixing each component, a generally known mixing device can be used, for example, a flat plate type, a propeller type in a mixing tank,
A general mixer having a structure in which a stirring blade such as a Faudler type is rotated; a ball mill having a structure in which a stirring ball is caused to flow in a mixing tank; and the like. Henschel mixers with blades are preferred.

For the molding of the vinyl chloride resin composition,
A known molding method is used. In the case of extrusion molding, a single-screw extruder, a twin-screw extruder, or the like is suitably used as an extruder. Further, in this case, in order to improve the quality of the molded product and the working efficiency, the molded product may be once pelletized and then extruded. The molding temperature is 160 to 200 as cylinder temperature.
C. and a mold temperature of 150 to 200 C. are preferred.

[0043]

EXAMPLES Hereinafter, in order to further clarify the effects of the present invention, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.

[Example 1] (Preparation of vinyl chloride resin [graft copolymerization]) Into a 15 L polymerization vessel equipped with a stirrer and a jacket, 7.5 k of pure water was added.
g, EVA (Evaflex 45LX, manufactured by Mitsui Dupont Chemical Co., Ltd.), 0.56 kg, partially saponified polyvinyl alcohol (Kuraray Co., Ltd., Kuraray Povar L-) as a dispersant
300 g of a 3% aqueous solution of 8) was added, and the air in the reactor was discharged by a pump. Then, 2.8 kg of a vinyl chloride monomer was added with stirring.

The temperature of the reactor was raised to 50 ° C., and EVA was dissolved in the vinyl chloride monomer for 2 hours. Once cooled to 35 ° C. or lower, 1 g each of t-butyl peroxy neodecanoate and α-cumyl peroxydecanoate were added as polymerization initiators, and air in the reactor was discharged by a vacuum pump, and then stirred. Below, 2.8 kg of vinyl chloride monomer were added. The temperature of the reactor was raised to 64 ° C. to initiate polymerization.

When the pressure in the polymerization vessel dropped to a pressure of 5.6 kgf / cm 2, the polymerization rate of the vinyl chloride monomer became 80%. Therefore, the completion of the reaction was confirmed, and a defoaming agent (Toray Silicon SH5510 manufactured by Toray Industries, Inc.) was used. The reaction was stopped after adding under pressure. Thereafter, the unreacted vinyl chloride monomer was removed, and further dehydration drying was performed to obtain a vinyl chloride resin (graft (A1)).

[0047] Tribasic lead sulfate TS-102 was used as a stabilizer with respect to 100 parts by weight of the obtained graft product (A1).
(Shinagawa Chemical Co., Ltd.) 1.5 parts by weight, lead stearate SL-
1000 (manufactured by Sakai Chemical Co., Ltd.) 1.5 parts by weight, as a processing aid, Metablen P501A (manufactured by Mitsubishi Rayon) 1.0
A 1.0 L part by weight of RIQUESTER EW-100 (manufactured by Riken Vitamin Co., Ltd.) was blended with a 100 L Henschel mixer (manufactured by Kawada Industries Co., Ltd.) as a lubricant to prepare a compounded powder.

(Formation of downspout) The above-mentioned compounded powder is put into an extruder (SLM-50, manufactured by Sekisui Koki Co., Ltd.), and is extruded under the conditions of a barrel temperature of 180 to 195 ° C and a mold temperature of 195 ° C. By extrusion molding, a downspout having an inner diameter of 40φ and a thickness of 1.0 mm was obtained.

(Evaluation of cracking at low temperature) Obtained inner diameter 40φ
Cut the downspout to a length of 20 cm, fill it with water,
Both ends were sealed, allowed to stand at −10 ° C. for 1 day, and observed for cracks and cracks in the downspout when taken out. The results are shown in Table 1.

[0050]

[Table 1]

AC in Tables 1 to 5 is "KANEACE FM"
-21 "(average particle size after dispersion: 0.1 to 1 [mu] m, manufactured by Kaneka Chemical Co., Ltd.), EVA is" Evaflex 45LX "(vinyl acetate content: 45% by weight, MFR3, manufactured by Mitsui Dupont Chemical Co., Ltd.), and EA is "Evaflex EEA A-70
9 "(MFR25, manufactured by Mitsui Dupont Chemical Company), NB
R is “JSR PN30A” (acrylonitrile content 35% by weight, ML1 + 4: 100 ° C. = 42, manufactured by Nippon Synthetic Rubber Co., Ltd.), CPE is “Eraslen 351A” (chlorine content 35 wt%, MFR2, manufactured by Showa Denko KK), CPE Is Hypalon 40 (chlorine content 35 wt%, sulfur content 1.1 wt%, ML1 + 4: 100 ° C. = 30, manufactured by Tosoh Corporation), PU is “Pandex 500E” (caprolactone-based, manufactured by Dainippon Ink). Represent.

Further, St-PVC in Tables 1 to 5 is TS-PVC.
1000R (a vinyl chloride homopolymer having a degree of polymerization of 1,000,
P (Vc-Et) is VE-T
(Vinyl chloride-ethylene copolymer having a degree of polymerization of 700, ethylene content of 8% by weight, manufactured by Tokuyama Sekisui Kogyo Co., Ltd.).

Examples 2 to 8 A graft product (A1) was prepared and evaluated in the same manner as in Example 1 except that the types of elastomers to be grafted were as shown in Table 1. Table 1 shows the evaluation results.

Example 9 Polyvinyl chloride having a degree of polymerization of 1000 (TS-1000R, manufactured by Tokuyama Sekisui Kogyo Co., Ltd.) was 80% by weight, and Kaneace FM-21 (average particle diameter after dispersion was 0.1%).
(1 to 1 μm, manufactured by Kanegafuchi Chemical Co., Ltd.) to obtain a vinyl chloride resin composition (blend (B1)) by mixing them so that the ratio becomes 20% by weight. An evaluation was performed. Table 2 shows the evaluation results.

[Examples 10 to 16] A blend (B1) was obtained in the same manner as in Example 9 except that the kind and amount of the elastomer to be blended were set to the amounts shown in Table 2. The evaluation was performed in the same manner as described above. Table 2 shows the evaluation results.

Example 17 Example 17 was repeated except that the vinyl chloride resin was a vinyl chloride-ethylene copolymer (VE-T, degree of polymerization: 700, ethylene content: 8% by weight, manufactured by Tokuyama Sekisui Kogyo Co., Ltd.). After obtaining a blend (B1) in the same manner as in Example 9, evaluation was performed in the same manner as in Example 1. Table 2 shows the evaluation results.

Example 18 Graft polymerization was carried out in the same manner as in Example 1 except that the amount of EVA to be charged was 1.49 kg to obtain a graft resin in which the amount of elastomer in the graft resin was 40% by weight. To 50% by weight of the graft resin, polyvinyl chloride having a degree of polymerization of 1000 (TS-
(1000R) After mixing at a ratio of 50% by weight to obtain a vinyl chloride resin composition (blend (C1)), the same evaluation as in Example 1 was performed. Table 3 shows the evaluation results.

[Examples 19 to 25] Table 3 shows the types and the amounts of the elastomers to which the vinyl chloride monomer was grafted.
In the same manner as in Example 18 except that the amount was
After the graft resin was obtained, polyvinyl chloride was mixed to obtain a vinyl chloride resin composition (blend (C1)). Thereafter, evaluation was performed in the same manner as in Example 1, and the evaluation results were shown in Table 3.
It was shown to.

Example 26 Graft polymerization was carried out in the same manner as in Example 1 except that the amount of EVA to be charged was 0.43 kg to obtain a graft resin in which the amount of elastomer in the graft resin was 16% by weight. 95.2% by weight of the graft resin
After VA was mixed at a ratio of 4.8% by weight to obtain a vinyl chloride resin composition (blend (D1)), evaluation was performed in the same manner as in Example 1. Table 4 shows the evaluation results.

[Examples 27 to 33] A vinyl chloride resin composition (blend (D1)) was prepared in the same manner as in Example 26 except that the graft resin and the elastomer were mixed in the types and amounts shown in Table 4. After obtaining, evaluation was performed in the same manner as in Example 1. Table 4 shows the evaluation results.

Example 34 25% by weight of the resin prepared in Example 18 as a graft resin and 65% by weight of polyvinyl chloride (TS-1000R, manufactured by Tokuyama Sekisui Kogyo Co., Ltd.) as a vinyl chloride resin having a polymerization degree of 1000. Further, 10% by weight of EVA used in Example 1 as an elastomer was mixed to obtain a vinyl chloride resin composition (blend (E1)).
Thereafter, evaluation was performed in the same manner as in Example 1, and the evaluation results are shown in Table 5.

Examples 35 to 41 A vinyl chloride resin composition (blend (E1)) was prepared by mixing graft resins, vinyl chloride resins and elastomers in the types and amounts shown in Table 5.
I got Thereafter, evaluation was performed in the same manner as in Example 1, and the evaluation results are shown in Table 5.

[0063]

[Table 2]

[0064]

[Table 3]

[0065]

[Table 4]

[0066]

[Table 5]

[Comparative Example 1] The resin had a polymerization degree of 1000
Polyvinyl chloride resin (TS-10 manufactured by Tokuyama Sekisui Industry Co., Ltd.)
00R, vinyl chloride homopolymer) alone (ie 1
A downspout was obtained and evaluated in the same manner as in Example 1 except that the weight was 00% by weight. Unlike the examples, as a result of the low-temperature cracking test, cracking occurred.

[0068]

According to the first aspect of the present invention, the downspout of the present invention has the above-mentioned structure and is formed from a raw material in which the characteristics of an elastomer and vinyl chloride are combined. And elasticity.

Therefore, even when the attached water freezes and the volume expands at a low temperature, the gutter itself expands and contracts and follows the volume expansion of the water, so that the pressure in the gutter hardly increases, and Area where there is a risk that water in the downspout may be frozen in cold areas, etc. In such a case, stable performance can be maintained for a long time.

The downspout of the present invention according to claim 2 has the above-mentioned structure, and the graft (A1) in which the ratio between the elastomer and the vinyl chloride monomer is specified, and the ratio between the elastomer and the vinyl chloride resin is specified. Blended product (B1), blended product in which vinyl chloride resin or elastomer is blended in a specific ratio to the grafted product, (C1), (D1) and (E1)
Therefore, the effects of the present invention described in claim 1 can be more reliably achieved.

The downpipe according to the third aspect of the present invention has the above-mentioned structure, and the elastomer is one type selected from the group consisting of the specified resin. The effect can be achieved more reliably.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining a conventional technique.

[Explanation of symbols]

 4 Downspout 5 Rod-shaped expansion absorbing member 7 Locking device

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) 4J002 AC082 BB062 BB072 BB242 BB272 BD041 BD051 BG042 BG052 BN081 BN082 BN091 BN092 BN101 BN102 BN121 BN122 BN141 BN142 BN171 BN172 CK022 FD010 FD020 FD020 FD010 FD020 FD020 FD010 FD020

Claims (3)

[Claims] 1. A graft (A) in which a vinyl chloride monomer is graft-polymerized on an elastomer, a blend (B) of an elastomer and a vinyl chloride resin, and a blend of the graft (A) and a vinyl chloride resin. (C) a blend (D) of the graft (A) with the same or different elastomer as the elastomer, and a blend of the graft (A) with the vinyl chloride resin and the same or different elastomer as the elastomer. A downspout formed from any one of the raw materials of the blend (E). 2. The above downspout comprises a graft (A1) in which a vinyl chloride monomer is graft-polymerized to an elastomer of 10 to 30% by weight and an elastomer of 10 to 30% by weight.
Blend (B1) of 90% to 70% by weight of a vinyl chloride resin and a blend (C1) comprising the blend (C) and 10 to 30% by weight of an elastomer;
The blend (D), wherein the elastomer is 10 to 30.
% Of the blend (D1) and the above-mentioned blend (E), which is formed from any one of the raw materials of the blend (E1) comprising 10 to 30% by weight of the elastomer. The downspout according to claim 1. 3. The elastomer according to claim 1, wherein the elastomer is an ethylene-vinyl acetate copolymer, an ethylene- (meth) acrylate copolymer, an acrylonitrile-butadiene copolymer, a chlorinated polyethylene, or a (meth) acrylate copolymer. 3. The downspout according to claim 1, wherein the downspout is one selected from the group consisting of: methyl methacrylate-styrene-butadiene copolymer, chlorosulfonated polyethylene, and polyurethane.