JP2000191863A - Window sealing molded article and preparation thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a window-sealing product which realizes an extremely high sealing property using a low-cost material without deteriorating productivity. SOLUTION: The titled molded part is prepared by melt blending 100 pts.wt. ethylene/α-olefin/non-conjugated polyene copolymer rubber with from 5 to 40 pts.wt. polyolefin resin, wherein the ethylene/α-olefin/non-conjugated polyene copolymer rubber comprising ethylene, an 3-20C α-olefin and a non-conjugated polyene, has an ethylene content of from 50 to 80 mol%, exerts an intrinsic viscosity, measured in decalin at 135 deg.C, of from 2.0 to 5.0 dl/g and has an iodine number of from 10 to 40. A resin alloy ethylene/α-olefin copolymer rubber, wherein the polyolefin resin is dispersed in the ethylene/α-olefin/non-conjugated polyene copolymer rubber at an average particle size of 2 μm or smaller, is blended with from 50 to 300 pts.wt. carbon black and from 30 to 200 pts.wt. process oil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window seal product for an automobile, and in particular, to a very excellent low CS.
Glass run channel product with good (good seal) function,
The present invention relates to a belt molding product, a draining product, and a manufacturing technique thereof.

[0002]

2. Description of the Related Art Typical examples of window seal products for automobiles include glass run channels, belt moldings, and drainers. These seal between the window and the door of the car, and are important seal parts to prevent rain, wind and noise. This sealing property is exhibited by the force that presses the lip portion of the glass run channel and the glass to return to the original shape.

Conventionally, as shown in FIG. 1, in a window B of an automobile door A, in order to seal between the window frame 3 and the window glass 2, an inner periphery of the window frame 3 is provided as shown in FIG. , A glass run channel 1. Glass run channel 1
A main body portion 11 having a U-shaped cross section for mounting on a sash 210 (FIG. 3) of a window frame 3 of an automobile door A and a glass sliding portion 13 slidingly contacting the window glass 2 to be opened and closed are formed on the surface. And a glass seal lip 12.

[0004] The sealing performance is the rubber elasticity that the glass seal lip tends to return to its original position when pressed by the glass. In order to improve the sealing performance, a compression set (hereinafter referred to as “C
S ". ) Had to be reduced. In order to reduce the CS of the rubber, it is common to increase the molecular weight of the polymer, decrease the compounding amount, or increase the crosslinking density by increasing the amount of the vulcanizing agent. But,
Increasing the molecular weight of the polymer decreases the productivity of rubber, and decreasing the compounding and filling amount is not realistic because the cost increases. Further, increasing the amount of the vulcanizing agent often causes a problem such as poor storage stability due to scorch of the unvulcanized rubber.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a window seal product for automobiles, which is a low-cost material and which can realize an epoch-making good sealing property without lowering the productivity. The purpose is to provide.

[0006]

It is very difficult to develop a material that improves rubber elasticity while maintaining material cost and production speed. The inventors of the present invention have conducted intensive studies and, as a result, have come to the idea of imparting a self-shape recovery function to the lip portion in contact with the glass. That is, the present invention includes the following inventions.

(1) An ethylene / α-olefin / non-conjugated polyene copolymer rubber comprising ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, and having an ethylene content of 50 to 80 mol%. Yes, 135
Intrinsic viscosity [η] measured in decalin at 2.0 ° C.
Odl / g and 100 parts by weight of an ethylene / α-olefin / non-conjugated polyene copolymer rubber (A) having an iodine value of 10 to 40, and a polyolefin resin (B) of 5 to 4 parts by weight.
0 parts by weight are melt-blended, and the polyolefin resin (B) is dispersed in the ethylene / α-olefin / non-conjugated polyene copolymer rubber (A) with an average particle size of 2 μm or less. -A thermosetting rubber composition for window seal products, comprising an olefin copolymer rubber, 50 to 300 parts by weight of carbon black, and 30 to 200 parts by weight of process oil.

(2) In the process of producing a window seal product using the composition described in (1), the following steps (1) to (3): Step (1): The glass seal lip is pressed. The angle of the lip is 45 ° or more and 180 ° in the direction opposite to the direction
Step (2): Then, at a temperature equal to or higher than the melting point of the polyolefin resin (B) blended in the composition, or at a temperature equal to or higher than the melting point. The temperature is raised to forcibly deform the bending angle of the product lip so as to have a desired product angle (shape). Step (3): Thereafter, the polyolefin resin (B) is cooled below the crystallization temperature. Fixing to a desired bending angle (shape) by using the method.

(3) The crosslink density of the vulcanized rubber obtained in step (1) is 9 times the crosslink density of the vulcanized rubber obtained in step (2).
Step (1) and step (2) so as to be 0 to 100%.
The production method according to the above (2), wherein (4) A window seal product manufactured by the manufacturing method according to (2) or (3). (5) The window seal product according to (4), wherein the shaping ratio is 60% or more.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Ethylene / α used in the present invention
-The olefin / non-conjugated polyene copolymer rubber (A)
It is a polymer in which ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene are randomly copolymerized. Examples of the α-olefin include propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene, 1-nonene,
-Decene, 1-undecene, 1-dodecene, 1-tridecene, 1-tetradecene, 1-pentadecene, 1-hexadecene, 1-heptadecene, 1-octadecene, 1-
Nonadecene, 1-eicosene and the like. Among these, propylene, 1-butene, 4-methyl-1-
Pentene, 1-hexene and 1-octene are preferred. That is, ethylene / propylene / non-conjugated polyene copolymer rubber, ethylene / 1-butene / non-conjugated polyene copolymer rubber, ethylene-4-methyl-1-pentene / non-conjugated polyene copolymer rubber, ethylene / 1- Hexene / non-conjugated polyene copolymer rubber and ethylene / 1-octene / non-conjugated polyene copolymer rubber are preferably used.

As the non-conjugated polyene, a cyclic or chain non-conjugated polyene can be used. Examples of the cyclic non-conjugated polyene include 5-ethylidene-2-
Norbornene, dicyclopentadiene, 5-vinyl-2
-Norbornene, norbornadiene, methyltetrahydroindene and the like. Examples of the chain non-conjugated polyene include 1,4-hexadiene, 7-methyl-1,6-octadiene, 4-ethylidene-8-methyl-1,7-nonadiene, and 4-ethylidene-1,7-diene. And undecadiene. These non-conjugated polyenes can be used alone or in combination of two or more.

In the present invention, the ethylene content in the copolymer rubber (A) needs to be 50 to 80 mol%. If the ethylene content is less than the lower limit, the low-temperature flexibility deteriorates, while if it exceeds the upper limit, the resin becomes resin-like and the rubber elasticity deteriorates. The ethylene content is preferably 60 to 75 mol%, more preferably 65 to 72 mol%. The non-conjugated polyene content in the copolymer rubber (A) is usually
It has an iodine value of 10 to 40, preferably 12 to 30.

The intrinsic viscosity [η] of the copolymer rubber (A) measured in decalin at 135 ° C. is 2.0 to 5.0 dl.
/ G. When the intrinsic viscosity [η] is less than the lower limit, the mechanical strength as a seal product is lost. On the other hand, when the intrinsic viscosity [η] exceeds the upper limit, extrudability is deteriorated. The intrinsic viscosity [η] is preferably from 2.5 to 4.0.
dl / g.

In the present invention, the copolymer rubber (A) can be used alone or in combination of two or more. The ethylene / α-olefin / non-conjugated polyene copolymer rubber having the above-mentioned properties is described in “Polymer Production Process (published by the Industrial Research Institute, pp.309-330)”.
It can be prepared by a conventionally known method as described in, for example.

The polyolefin resin (B) used in the present invention is a thermoplastic resin, and specifically, an ethylene homopolymer such as high density polyethylene, medium density polyethylene, low density polyethylene, and linear low density polyethylene. (Polyethylene) or a crystalline ethylene / α-olefin copolymer comprising ethylene and an α-olefin having 3 to 20, preferably 3 to 8 carbon atoms; propylene homopolymer, propylene block copolymer, propylene random copolymer Crystallinity of α-olefin having 3 to 20, preferably 3 to 8 carbon atoms such as polypropylene such as coalesce; propylene, 1-butene, 4-methyl-1-pentene, 1-hexene, 1-heptene and 1-octene. Homopolymers or copolymers are exemplified. The melting point of these polyolefins is 250 ° C. or less. Among them, polyethylene and polypropylene are preferable, and polypropylene is particularly preferable.

In the present invention, the polyolefin resin (B) needs to have an average particle diameter (determined from an electron micrograph) of 2 μm or less. When the average particle size exceeds 2 μm, the polyolefin resin disturbs the surface layer as a foreign substance and deteriorates compression set. The average particle size is preferably 0.02 to 0.8 μm. The degree of crystallinity of the polyolefin resin (B) is preferably 20 to 100%. The aspect ratio (major axis / minor axis) of the dispersed particles of the polyolefin resin (B) is preferably 5 or less, more preferably 1 to 3. When the aspect ratio is 5 or less, the microdispersion of the polyolefin resin (B) particles is good.

When the polyolefin resin (B) is a propylene (co) polymer, its melt flow rate (MFR; ASTM D 1238, 190 ° C., load 2.16 kg) is usually 0.1 to 50 g / 10 min. , Preferably 0.5 to 40 g /
It is in the range of 10 minutes, more preferably 1 to 30 g / 10 minutes. When the polyolefin resin (B) is a 1-butene (co) polymer, its MFR (ASTM D 1238, 190 ° C, load
2.16 kg) is usually 0.05-50 g / 10 min, preferably 0.1-30 g / 10 min, more preferably 0.5-2 g / 10 min.
It is in the range of 5 g / 10 minutes.

In the present invention, the polyolefin resin (B) is used in an amount of 5 to 40 parts by weight based on 100 parts by weight of the copolymer rubber (A). If the amount of the polyolefin resin (B) is less than the lower limit, the product lip cannot be forcibly deformed in step (2) of the production method of the present invention. The resins are connected to each other, and the compression set deteriorates. The blending amount of the polyolefin resin (B) is preferably 10 to 30 parts by weight.

In the present invention, the polyolefin resin (B) is melt-blended with the copolymer rubber (A) at a temperature not lower than the melting point of the polyolefin resin (B). A resin alloy ethylene / α-olefin copolymer rubber dispersed in the copolymer rubber (A) with an average particle size of 2 μm or less is prepared.

The carbon black used in the present invention is
If it is one usually used for rubber, its type (for example, SRF, GPF, FEF, MAF, HAF, ISA)
F, SAF, FT, MT, etc.). In the present invention, carbon black is
50 to 30 parts by weight per 100 parts by weight of the copolymer rubber (A)
It is used in a proportion of 0 parts by weight. When the compounding amount of the carbon black is less than the lower limit, the product hardness is reduced and the force for holding down the glass is reduced, so that it is impossible to seal from rain, wind, and sound. Compression set is deteriorated by being overfilled. The compounding amount of carbon black is preferably 70 to 200 parts by weight.

In the present invention, the process oil is used in an amount of 30 to 200 parts by weight per 100 parts by weight of the copolymer rubber (A).
Used in parts by weight. If the blending amount of the process oil is less than the lower limit, the kneadability deteriorates, while if it exceeds the upper limit, the compression set deteriorates. The amount of the process oil is preferably 30 to 150 parts by weight. In the present invention, sulfur is used as a vulcanizing agent in an amount of usually 0.1 to 10 parts by weight, preferably 0.5 to 3 parts by weight, and more preferably 1.10 parts by weight, based on 100 parts by weight of the copolymer rubber (A).
It is used in a proportion of 0 to 3.0 parts by weight. As the sulfur, specifically, powdered sulfur, precipitated sulfur, colloidal sulfur,
Examples include surface-treated sulfur and insoluble sulfur.

It is preferable to use a vulcanization accelerator in addition to sulfur used as a vulcanizing agent. Specific examples of the vulcanization accelerator include N-cyclohexyl-2-benzothiazolesulfenamide, N-oxydiethylene-2-benzothiazolesulfenamide, N, N-diisopropyl-2-benzothiazolesulfenamide , 2-mercaptobenzothiazole, 2- (2,4-
Dinitrophenyl) mercaptobenzothiazole, 2-
(2,6-Diethyl-4-morpholinothio) thiazole compounds such as benzothiazole and dibenzothiazyldisulfide; guanidine compounds such as diphenylguanidine, triphenylguanidine, diorsonitrileguanidine, orthonitrile biguanide, diphenylguanidine phthalate An acetaldehyde-aniline reactant;
Aldehyde amines such as butyraldehyde-aniline condensate, hexamethylenetetramine, acetaldehyde ammonia and aldehyde-ammonia compounds; imidazoline compounds such as 2-mercaptoimidazoline; thiocarbanilide, diethylthiourea, dibutylthiourea, trimethylthiourea, diortho Thiouria compounds such as tolylthiourea; thiuram compounds such as tetramethylthiuram monosulfide, tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetrabutylthiuram disulfide, pentamethylenethiuram tetrasulfide; zinc dimethyldithiocarbamate, zinc diethyldithiocarbamate; Zinc di-n-butyldithiocarbamate, zinc ethylphenyldithiocarbamate, butyl E sulfonyl dithiocarbamic acid zinc,
Dithiocarbamate compounds such as sodium dimethyldithiocarbamate, selenium dimethyldithiocarbamate and tellurium dimethyldithiocarbamate; xanthate compounds such as zinc dibutylxanthogenate; and compounds such as zinc oxide (zinc white).

In the present invention, the vulcanization accelerator is usually used in an amount of 0.1 to 20 parts by weight per 100 parts by weight of the copolymer rubber (A).
It can be used in an amount of preferably 0.5 to 15 parts by weight, more preferably 1 to 10 parts by weight. In the present invention, in addition to the above-mentioned components, a plasticizer (softening agent) other than the process oil, a filler, a processing aid, a surfactant, an antioxidant, a heat stabilizer, and a weather stabilizer may be used, if necessary. , An antistatic agent, a coloring agent, a lubricant, a thickener and other compounding agents for rubber can be compounded within a range not to impair the object of the present invention.

As the plasticizer (softening agent), a plasticizer usually used for rubber is used. Specifically, lubricating oil, paraffin oil, liquid paraffin, petroleum asphalt, petrolatum, coal tar, castor oil, linseed oil, sub, beeswax, palmitic acid, stearic acid, barium stearate, calcium stearate, zinc laurate, Examples include atactic polypropylene and coumaroindene resin.

[0025] Specific examples of the filler include calcium carbonate, talc, clay and the like. The filler is usually 1 to 100 parts by weight of the copolymer rubber (A).
It is used in a proportion of 0 to 50 parts by weight. Each step of the manufacturing method of the present invention will be described by taking as an example a case where the lip shape shown in FIG. 3 is obtained.

Step (1): Continuous vulcanization is performed in a direction opposite to the direction in which the glass is pushed in (the direction in which the lip is pressed) with a die having an angle of the lip of 45 ° or more and less than 180 °. Step (2): Then, the temperature of the polyolefin resin (B) blended in the composition is raised to a temperature equal to or higher than the melting point or to a temperature equal to or higher than the melting point, and the bending angle of the product lip is adjusted. The product is forcibly deformed to the desired product angle (lip shape). Step (3): Thereafter, the polyolefin resin (B) is cooled to a temperature lower than the crystallization temperature to fix the polyolefin resin (B) at a desired bending angle. Thereby, a self-shape recovery function can be given to the seal portion as a material property.

In the step (1), by forming the product angle extruded at a larger angle than the target angle, it is attempted to return the product in the direction opposite to the glass pressing direction as compared with the product extruded at the target angle from the beginning. Rubber elasticity increases. If this angle is less than 45 °, the rubber elasticity in the direction opposite to the direction in which the glass is pushed in becomes weak, while 180 °
Above, it is difficult to perform the processing for obtaining the target shape in the steps (2) and (3).

In the step (2), the polyolefin resin (B) is melted in the copolymer rubber (A), and in this state, pressing is performed so that a desired bending angle (product shape) is obtained. When the polyolefin resin is cooled to a temperature lower than the crystallization temperature of the polyolefin resin in the step (3), the morphology of the polyolefin resin in the material in the present invention is deformed into a rod shape, and the bending angle (shape) obtained in the step (2) can be fixed. . In other words, the product lip portion is a product in which the rubber elasticity, which tends to return to the direction of pressing the glass, maintains the desired shape due to the change in the morphology of the resin. This product exhibits good sealing performance by compensating for the rubber elasticity (CS), which decreases as the glass is pushed in, with the rubber elasticity that attempts to return to the shape molded in step (1).

In the production method of the present invention, step (1)
The steps (1) and (2) are preferably carried out so that the crosslinked density of the vulcanized rubber obtained in step (2) is 90 to 100% of the crosslinked density of the vulcanized rubber obtained in step (2). By applying the rubber composition and the manufacturing method of the present invention to a glass run, a belt molding, and a lip portion of a drainer, a window seal part for an automobile having good sealing properties can be obtained. The glass run, belt molding, and draining product of the present invention preferably have a shaping ratio of 60% or more, particularly 80 to 100%.

[0030]

EXAMPLES The present invention will be described more specifically with reference to examples and comparative examples, but the scope of the present invention is not limited to these examples. In addition, various physical properties in Examples and Comparative Examples and test methods thereof are as follows.

(1) Compression set test A piece of glass having a thickness of 5 mm was applied to the lip of a product having the shape (θ _k = 45 °) shown in FIG.
mm so that the deformed angle θ _k becomes 20 °. After standing at 70 ° C. for 200 hours, the angle (X) recovered after 30 minutes was determined, and the compression set (CS) (%) of the product lip was determined by the following equation.

[0032]

## EQU1 ## CS (%) = [(X−20 °) / (45 ° −2)
0 °)] × 100

(2) Shaping rate In an L-shaped extruded vulcanized rubber whose one side of the lip cross section is 20 mm, the vulcanized rubber having an angle of 90 ° is formed at an angle of 45 ° at a temperature not lower than the melting point of the polyolefin resin. The cross-sectional angle (Y) obtained by pressing the polyolefin resin for 10 minutes and cooling to the crystallization temperature of the polyolefin resin (5 minutes) was determined, and the shaping ratio was determined by the following equation.

[0034]

[Formula 2] Shaping ratio (%) = [(Y−45 °) / (90 ° −
45 °)] × 100

(3) Average particle size of polyolefin resin dispersed particles Electron microscope (trade name: H-8100 (200 KV),
(Manufactured by Hitachi, Ltd.), and the sample prepared in the following manner was measured. <Preparation of Sample> The polymer after resin blending in Table 1 was trimmed, a thin film piece having a thickness of 0.1 μm or less was prepared with a microtome, and this thin film piece was stained with ruthenic acid. Next, carbon was vapor-deposited on the thin film piece to obtain a sample for an electron microscope.

(4) Vulcanized Rubber Crosslink Density Vulcanized rubber was punched out from the product lip in a size of 1 cm × 1 cm, and the weight change when immersed in a toluene solvent at 37 ° C. for 3 days was measured. (Rubber test method: Japan Rubber Association, page 208, 1988).

(Examples 1 to 4 and Comparative Examples 1 and 2) (1) Ethylene / α-olefin /
A non-conjugated polyene copolymer rubber (EPDM) was melt-blended with a polyolefin resin at a temperature (200 ° C.) higher than the melting point of the polyolefin resin. Using this compound (hereinafter referred to as “EPDM / resin alloy”), a composition comprising the compounding agents shown in Table 1 was prepared, and a 4.3 L Banbury mixer (manufactured by Kobe Steel Ltd.) was prepared. make use of,
After kneading at 170 ° C. for 5 minutes and cooling, the obtained kneaded product (compound) was mixed with a vulcanization accelerator 2- (4′-morpholinodithio) benzothiazole (trade name: Noxeller MDB,
1.3 parts by weight of Ouchi Shinko Chemical Industry Co., Ltd., 1.3 parts by weight of vulcanization accelerator zinc di-n-butyldithiocarbamate (trade name: Suncellor Bz, Sanshin Chemical Industry Co., Ltd.) Promoter Ethylenethiourea (trade name: Suncellar 22, Sanshin Chemical Industry Co., Ltd.) 0.7 parts by weight and insoluble sulfur 1.5
The mixture was kneaded with an 8 inch open roll (manufactured by Nippon Roll Co., Ltd.) (roll temperature: 60 ° C.) for 7 minutes to obtain a rubber composition. A ribbon was cut from the roll.

Next, the ribbon obtained by the kneading and the roll was extruded while being fed into a 50 mm rubber extruder provided with a die having a cross section shown in FIG. 4A, FIG. 5A ′ or FIG. It was commercialized by continuous vulcanization under the condition of 220 ° C. × 3 minutes using a HAV (hot air vulcanizing tank) (8 m) (Step 1). Next, a roller is attached to the outlet of the HAV as shown in FIG. 7 (FIG. 7 (1)), cooled while pressing (FIG. 7 (2)), and adjusting the pressing time to obtain the desired shape (FIG. 6). The shape was adjusted according to the pressing time so that In addition, the main bodies 11 and 11 ′ are indicated by arrows a,
b direction (FIG. 4) or the glass seal lip 12
And 12 ′ were pressed in the directions of a ′ and b ′ (FIG. 5) using a roller so that the final product had the shape of FIG. 4B or FIG. 5B (steps 2 and 3). The cooling rate changes depending on the pressing time, and the shape can be adjusted.

The product thus obtained has the same apparent product shape as that of the conventional rubber material, but has the main body portions 11 and 11 ′ or the glass seal lips 12 and 1.
2 'has an internal force trying to return in the opposite direction of the arrow. Therefore, in general, due to the vertical movement of the glass, due to the rubber elasticity that gradually decreases, the sealing property decreases,
Since the product of the present invention always tries to return the glass to the sealing direction, the sealing performance does not decrease. Table 1 shows the production conditions and the results of the physical property tests.

[0040]

[Table 1]

1) Ethylene / propylene / 5-ethylidene-2-norbornene copolymer rubber Ethylene content: 70 mol% (ethylene content + propylene content + diene content = 100) Iodine value: 15 135 ° C. Limit measured in decalin Viscosity [η]: 2.8 dl / g Mooney viscosity ML _{1 + 4} (100 ° C.): 100 (measured value after oil extension) Oil extension: 10 parts by weight of paraffin oil (based on 100 parts by weight of rubber)

2) Propylene polymer (PP) DSC (melting point): 160 ° C. Average particle size (μm): 0.2 MFR [ASTM D 1238, 190 ° C., load 2.16 kg]: 10 g / 10 minutes Aspect ratio of dispersed particles: 1.5 Crystallinity: 50%

3) 1-butene polymer (PB) DSC (melting point): 130 ° C. Average particle size (μm): 0.15 MFR [ASTM D 1238, 190 ° C., load 2.16 kg]: 20 g / 10 minutes Aspect of dispersed particles Ratio: 1.8 Crystallinity: 20%

4) FEF carbon black (trade name: Asahi 60G, manufactured by Asahi Carbon Co., Ltd.) 5) Paraffin-based process oil (trade name: Diana Process PW-380, manufactured by Idemitsu Kosan Co., Ltd.) 6) Surfactant , Dialkyl ammonium chloride (trade name: ARKARD 2HTF, manufactured by Kao Corporation) 7) Filler, heavy calcium carbonate (trade name: Whiten SB, manufactured by Shiraishi Calcium Co., Ltd.) 8) Processing aid, dehydrating agent ( (Product name: Vesta PP, manufactured by Inoue Coal Industry Co., Ltd.)

[0045]

According to the present invention, it is possible to provide a window seal product which can realize an epoch-making good sealing property with a low-cost material and without lowering the productivity.

[Brief description of the drawings]

FIG. 1 is a view showing a portion of a vehicle to which a window seal product is applied.

FIG. 2 is a cross-sectional view of a glass run channel.

FIG. 3 is a diagram showing a part of a cross section taken along line AA of FIG. 1;

FIG. 4 is a schematic view showing one embodiment of the production method of the present invention.

FIG. 5 is a schematic view showing one embodiment of the production method of the present invention.

FIG. 6 is a diagram showing a bending angle in step 1;

FIG. 7 is a view showing a step of forcibly deforming the bending angle of the product lip obtained in step 1 so as to be a target product angle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glass run channel 2,31 Window glass 3 Window frame 11,11 'Glass run channel main body 12,12' Glass seal lip 13 Glass sliding part 41 Surface 210 Sash 5 Roller

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08K 5/01 B60J 1/16 A // (C08L 23/16 23:00) (72) Masao Masao Kawasaki 3 Chizukaigan, Ichihara-shi, Chiba Prefecture (72) Inventor Masaaki Kawasaki 3 Mitsui Chemicals Co., Ltd., Ichihara-shi, Chiba F-term (reference) 3D127 AA19 BB01 CB05 CC05 DE02 DE17 DE23 DE25 4F071 AA14 AA14X AA15 AA16 AA17 AA18 AA19 AA20 AA76 AA80 AA81 AA89 AB03 AC02 AD06 AE02 AE03 AG05 AH07 BA01 BB06 BC17 4F209 AA03 AA45E AA45K AB07 AB18 AH13 AH23 NA05 NB01 BB 012 NB01 FB01 NB01 BB01

Claims (5)

[Claims] 1. An ethylene / α-olefin / non-conjugated polyene copolymer rubber comprising ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, and having an ethylene content of 50 to 80 mol%. The intrinsic viscosity [η] measured in decalin at 135 ° C. is 2.0 to 5. Odl
/ G and an ethylene / α having an iodine value of 10 to 40
-Olefin / non-conjugated polyene copolymer rubber (A) 10
5 to 40 parts by weight of the polyolefin resin (B) is melt-blended to 0 parts by weight, and the polyolefin resin (B) has an average particle size of 2 μm or less in the ethylene / α-olefin / non-conjugated polyene copolymer rubber (A). Thermosetting rubber for window seal products, comprising a resin alloy ethylene / α-olefin copolymer rubber dispersed by diameter, 50 to 300 parts by weight of carbon black, and 30 to 200 parts by weight of process oil Composition. 2. In the process of producing a window seal product using the composition according to claim 1, the following step (1):
-(3): Step (1): In the direction opposite to the direction in which the glass seal lip is pressed, the angle of the lip is set to 45 ° or more and 180 °.
Step (2): Then, at a temperature equal to or higher than the melting point of the polyolefin resin (B) blended in the composition, or at a temperature equal to or higher than the melting point. Raising the temperature to forcibly deform the bending angle of the product lip portion to the desired product angle. Step (3): Thereafter, cooling the product to a temperature lower than the crystallization temperature of the polyolefin resin (B). A method for manufacturing a window seal product. 3. The crosslinked density of the vulcanized rubber obtained in the step (1) is 90 to 90% of the crosslinked density of the vulcanized rubber obtained in the step (2).
3. The method according to claim 2, wherein the steps (1) and (2) are performed so as to be 100%. 4. A window seal product manufactured by the manufacturing method according to claim 2. 5. The window seal product according to claim 4, wherein the shaping ratio is 60% or more.