JP2000095900A - Resin composition for facing member and laminate containing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition and laminate, good in slidability with window glass, high in abrasion resistance and slight in tarry and sticky impurities developed in the extrusion molding process therefor. SOLUTION: This resin composition for facing member comprises (A) 100 pts.wt. of a partly or fully crosslinked olefin-based thermoplastic elastomer, (B) 2-20 pts.wt. of an organopolysiloxane with a viscosity (determined in accordance with JIS K-2283, 25 deg.C) of >=1×106 cSt (pref. 1×106 to 1×108 cSt), (C) 0.5-5 pts.wt. of an organopolysiloxane with a viscosity (determined as mentioned above) of >=10 cSt but <106 cSt, and (D) 5-150 pts.wt. of a polyolefin resin and/or (E) 0.5-10 pts.wt. of a fluoropolymer. The other objective laminate is obtained by laminating a thermoplastic elastomer core body with the above resin composition as facing member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an olefin-based thermoplastic elastomer composition for a skin member and a laminate thereof. More specifically, the present invention relates to an olefin-based thermoplastic elastomer composition for a skin member having excellent sliding wear properties and extrudability, and a laminate thereof.

[0002]

BACKGROUND OF THE INVENTION Olefin-based thermoplastic elastomers are lightweight and easy to recycle, and do not generate toxic gases during incineration. Applications are expanding to automotive parts, industrial machine parts, electric / electronic parts, building materials, and the like.

One example of such an automobile part is a glass run channel. The glass run channel is a guide member provided between the window glass and the window frame. The glass run channel facilitates the raising and lowering operation of the window glass and tight (liquid-tight) connection between the window glass and the window frame. Sealing operation is required.

A conventional glass run channel has a surface made of a soft synthetic resin such as a soft vinyl chloride resin, a base material such as an ethylene-propylene-diene copolymer rubber, or a nylon film for sliding with a window glass. Was bonded with an adhesive. Further, in order to further reduce the contact area with the window glass, embossing has been performed before or after lamination of the nylon film or the like.

[0005] Such a glass run channel has a drawback that it is liable to peel off between the base material layer and the skin layer due to the lamination step using an adhesive, and also has a problem that the number of steps is large and complicated. there were.

Accordingly, the present inventors have paid attention to the above-mentioned olefin-based thermoplastic elastomer in order to solve the above-mentioned problems of the glass run channel. However, when an olefin-based thermoplastic elastomer is used for the glass run channel in a single layer, the sliding property with the window glass is poor, severe abrasion occurs, and the amount of die stain generated on the die at the time of extrusion molding is general. There are many problems compared to resins, and this has caused problems such as the appearance of eye dust adhering to the molded product and poor appearance.

On the other hand, for example, Japanese Patent Laid-Open No. 9-17640
No. 8 describes that the addition of a fatty acid amide to an olefin-based thermoplastic elastomer composition improves the slidability and abrasion. However, even with this method, there is a problem that eye tan is generated during extrusion molding of the olefin-based thermoplastic elastomer composition.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems associated with the prior art described above, and to use a composition comprising an olefinic thermoplastic elastomer and a specific organopolysiloxane as a skin member. The present invention aims to provide a resin composition and a laminate using the same, which can provide a laminate having good slidability with a window glass, excellent abrasion resistance, and having a small amount of die buildup generated during extrusion molding. And

[0009]

SUMMARY OF THE INVENTION The resin composition for a skin member according to the present invention comprises:
100 parts by weight of a completely or partially crosslinked olefinic thermoplastic elastomer (A) and a viscosity [JIS K2283, 25 ° C.] of 1 × 10 ⁶ cSt or more, preferably 1 × 10 ⁶ to 1 × 10
2 to 20 parts by weight of ⁸ cSt organopolysiloxane (B) and a viscosity [JIS K2283, 25 ° C.] of 10 to 1 × 10 ⁶ cSt
Less than 0.5 to 5 parts by weight of the organopolysiloxane (C). The composition may contain 5 to 150 parts by weight of the polyolefin resin (D) and / or 0.5 to 10 parts by weight of the fluoropolymer (E).

The laminate according to the present invention is a laminate obtained by laminating a thermoplastic elastomer as a core and the above resin composition as a skin member. Such a composition has good slidability with glass and excellent abrasion resistance, and has little eye rejection during extrusion molding. In the present specification, the term “resin” means an adhered substance having a different color or physical property from a raw material adhered to a die during extrusion molding of a thermoplastic elastomer.
The yellowish adhesive and yellow fine particles are known, and are considered to be deterioration products of the raw material polymer. However, the generation mechanism is not clear.

[0011]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, the resin composition for a skin member according to the present invention and a laminate using the same will be described more specifically.

The resin composition for a skin member according to the present invention comprises an olefin-based thermoplastic elastomer (A), an organopolysiloxane (B) and an organopolysiloxane (C).
Further comprising a polyolefin resin (D),
A fluorine-based polymer (E) may be contained.

Olefin Thermoplastic Elastomer (A) The olefin thermoplastic elastomer (A) used in the present invention is composed of a crystalline polyolefin and a rubber.

The crystalline polyolefin used in the present invention includes a homopolymer or copolymer of an α-olefin having 2 to 20 carbon atoms.

Specific examples of the crystalline polyolefin include the following (co) polymers. (1) Ethylene homopolymer (manufacturing method may be either low pressure method or high pressure method) Polymer (3) Propylene homopolymer (4) Random copolymer of propylene and 10 mol% or less of other α-olefin (5) Block copolymer of propylene and 30 mol% or less of other α-olefin (6) 1-butene homopolymer (7) Random copolymer of 1-butene and 10 mol% or less of other α-olefin (8) 4-methyl-1-pentene homopolymer (9) 4 -Methyl-1-pentene and up to 20 mol% of other α
-Random copolymer with olefin As the α-olefin, specifically, ethylene, propylene, 1-butene, 4-methyl-1-pentene, 1-
Hexene, 1-octene and the like.

The rubber used in the present invention is not particularly limited, but an olefin copolymer rubber is preferred. The olefin-based copolymer rubber has 2 to 20 carbon atoms.
Is an amorphous random elastic copolymer containing α-olefin as a main component, and is an amorphous α-olefin copolymer composed of two or more α-olefins and non-conjugated with two or more α-olefins. Α-olefin / non-conjugated diene copolymer comprising diene.

Specific examples of such an olefin copolymer rubber include the following rubbers. (1) Ethylene / α-olefin copolymer rubber [ethylene / α-olefin (molar ratio) = about 90/10 to 50 /
50] (2) Ethylene / α-olefin / non-conjugated diene copolymer rubber [ethylene / α-olefin (molar ratio) = about 90
(3) Propylene / α-olefin copolymer rubber [propylene / α-olefin (molar ratio) = about 90/10 to 5]
0/50] (4) Butene / α-olefin copolymer rubber [butene /
α-olefin (molar ratio) = about 90/10 to 50/5
0] Specific examples of the α-olefin include the same α-olefins as the specific examples of the α-olefin constituting the crystalline polyolefin described above.

As the non-conjugated diene, specifically,
Examples thereof include dicyclopentadiene, 1,4-hexadiene, cyclooctadiene, methylene norbornene, and ethylidene norbornene.

Mooney viscosity ML of these copolymer rubbers
_{1 + 4} (100 ° C.) is from 10 to 250, especially from 40 to 150
Is preferred. The iodine value when the non-conjugated diene is copolymerized is preferably 25 or less.

The above-mentioned olefin copolymer rubber can exist in the thermoplastic elastomer in all cross-linked states such as uncross-linked, partially cross-linked and completely cross-linked, but in the present invention, it is present in the cross-linked state. It is preferable that they exist in a partially crosslinked state.

As a crosslinking agent for crosslinking the olefin-based copolymer rubber, an organic peroxide, a phenol-based vulcanizing agent, a silane coupling agent, or the like is used.

The rubber used in the present invention includes:
In addition to the above olefin copolymer rubber, other rubber,
For example, styrene-butadiene rubber (SBR), nitrile rubber (NBR), natural rubber (NR), butyl rubber (I
IR) and the like, diene rubbers, SEBS, polyisobutylene and the like.

In the thermoplastic elastomer used in the present invention, the weight ratio of the crystalline polyolefin to the rubber (crystalline polyolefin / rubber) is usually 90/10 to 10/10.
The range is 5/95, preferably 70/30 to 10/90.

When an olefin copolymer rubber and another rubber are used in combination as the rubber, the other rubber is a total amount of crystalline polyolefin and rubber of 1%.
40 parts by weight or less, preferably 5 to 100 parts by weight
It is blended at a ratio of 20 parts by weight.

The thermoplastic elastomer preferably used in the present invention comprises crystalline polypropylene, ethylene-α-
It consists of an olefin copolymer rubber or an ethylene / α-olefin / non-conjugated diene copolymer rubber, exists in a thermoplastic elastomer in a partially crosslinked state, and has a weight blend of crystalline polypropylene and rubber. The ratio (crystalline polypropylene / rubber) is 70 / 30-1
It is in the range of 0/90.

If necessary, additives such as a mineral oil-based softener, a heat stabilizer, an antistatic agent, a weather stabilizer, an antioxidant, a filler, a coloring agent, and a lubricant may be added to the thermoplastic elastomer. Can be blended within a range that does not impair the object of the present invention.

More specific examples of the thermoplastic elastomer preferably used in the present invention include 70 to 10 parts by weight of crystalline polypropylene (A-1) and ethylene-propylene copolymer rubber or ethylene-propylene-diene copolymer. 30 to 90 parts by weight of rubber (A-2) composed of a polymer rubber [The total amount of components (A-1) and (A-2) is 100
Parts by weight] and a rubber (A) other than the rubber (A-2).
-3) and / or mineral oil-based softener (A-4) 5-1
Of the rubber (A-2) obtained by dynamically heat-treating a mixture consisting of 00 parts by weight in the presence of an organic peroxide, a phenolic vulcanizing agent or a silane coupling agent. No.

In the present invention, the organic peroxide is
It is used in an amount of 0.05 to 3% by weight, preferably 0.1 to 1% by weight, based on 100% by weight of the total amount of the crystalline polyolefin and the rubber.

In the partial crosslinking treatment with the above-mentioned organic peroxide, a peroxy crosslinking auxiliary or a polyfunctional vinyl monomer can be blended. By using such a compound, a uniform and mild crosslinking reaction can be expected. Particularly, in the present invention, divinylbenzene is most preferred. Divinylbenzene is easy to handle, has good compatibility with the crystalline polyolefin and rubber, which are the main components of the above-mentioned crosslinked product, and has an action of solubilizing the organic peroxide. Therefore, a thermoplastic elastomer having a uniform cross-linking effect by heat treatment and a good balance between fluidity and physical properties can be obtained.

The crosslinking aid or the polyfunctional vinyl monomer as described above is used for the whole of the above-mentioned object to be crosslinked.
It is preferably used in a proportion of 0.1 to 2% by weight, particularly 0.3 to 1% by weight.

The term "dynamically heat-treating" means that the components constituting the above-mentioned thermoplastic elastomer are kneaded in a molten state. As the kneading device, a conventionally known kneading device, for example, an open-type mixing roll, a non-open-type Banbury mixer, an extruder, a kneader, a continuous mixer, or the like is used. Of these, a non-open type kneading apparatus is preferable, and kneading is preferably performed in an atmosphere of an inert gas such as nitrogen gas or carbon dioxide gas.

The thermoplastic elastomer particularly preferably used in the present invention is partially crosslinked. The term “partially crosslinked” means that the gel content is 20 to 98% as measured by the following method. In the present invention, the gel content is preferably in the range of 40 to 98%.

[Measurement method of gel content] A thermoplastic elastomer sample was weighed in an amount of about 100 mg and weighed 0.5 mm × 0.5 m
m × 0.5 mm, then cut the resulting strips into 30 ml cyclohexane in a closed vessel,
Soak at 48 ° C for 48 hours.

Next, the sample is taken out on a filter paper and dried at room temperature for at least 72 hours until the weight becomes constant. The value obtained by subtracting the weight of the cyclohexane-insoluble component (fibrous filler, filler, pigment, etc.) other than the polymer component from the weight of the dried residue is defined as “corrected final weight (Y)”.

On the other hand, the value obtained by subtracting the weight of the cyclohexane-soluble component (eg, softener) other than the polymer component and the weight of the cyclohexane-insoluble component (fibrous filler, filler, pigment, etc.) other than the polymer component from the weight of the sample is given by:
This is referred to as “corrected initial weight (X)”.

Here, the gel content (cyclohexane insoluble content) is determined by the following equation. Gel content [wt%] = [corrected final weight (Y)] ÷
[Corrected initial weight (X)] × 100

The thermoplastic elastomer (A) constituting one layer of the thermoplastic elastomer laminate according to the present invention is composed of a crystalline polyolefin and rubber, and thus has excellent fluidity.

The above-mentioned polyolefin-based thermoplastic elastomer can be molded by using a conventionally used molding apparatus such as compression molding, transfer molding, injection molding, and extrusion molding.

The organopolysiloxane (B) and
(C) Specific examples of the organopolysiloxanes (B) and (C) used in the present invention include dimethylpolysiloxane, methylphenylpolysiloxane, fluoropolysiloxane, tetramethyltetraphenylpolysiloxane, and methylhydrogenpolysiloxane. And modified polysiloxanes such as epoxy-modified, alkyl-modified, amino-modified, carboxyl-modified, alcohol-modified, fluorine-modified, alkylaralkyl-polyether-modified and epoxy-polyether-modified. Among them, dimethylpolysiloxane is preferably used.

The organopolysiloxane (B) has a viscosity [JIS K 2283, 25 ° C.] of 1,000,000 cSt or more, preferably 1 × 10 ⁶ cSt to 1 × 10 ⁸ cSt or less, more preferably 1 × 10 ⁸ cSt or less. × 10 ⁶ cSt ~
It is in the range of 1 × 10 ⁷ cSt.

Since the organopolysiloxane (B) used here has a very high viscosity, it may be a master batch with an olefin resin in order to enhance its dispersibility in the olefin thermoplastic elastomer. .

Such an organopolysiloxane (B)
Is used in an amount of 2 to 20 parts by weight, preferably 2 to 15 parts by weight, based on 100 parts by weight of the olefin-based thermoplastic elastomer (A).

The organopolysiloxane (C) has a viscosity [JIS K 2283, 25 ° C.] of 10 cSt to 10 cSt.
Less than 100,000 cSt, preferably 100 cSt to 100,000 cSt
St range.

If the viscosity of the organopolysiloxane (C) is less than 10 cSt, the organopolysiloxane (C) tends to precipitate on the surface of the obtained molded product, and may cause problems such as stickiness of the molded product surface.

Such an organopolysiloxane (C)
Is used in an amount of 0.5 to 5 parts by weight based on 100 parts by weight of the olefin-based thermoplastic elastomer (A). In addition, when the organopolysiloxane (B) having a viscosity of 1,000,000 cSt or more is used alone as the organopolysiloxane, it may cause the generation of eye drop at the time of molding.

Polyolefin Resin (D) As the polyolefin resin (D) used in the present invention, the crystalline polyolefin used in the above-mentioned polyolefin-based thermoplastic elastomer (A) is preferable.

Further, as another preferred example of the polyolefin (D) used in the present invention, the intrinsic viscosity [η] measured in a decalin solvent at 135 ° C. is 3.5 to 8.3 dl /.
g in the range of g. Such a polyolefin may be one kind of polyolefin, or a combination or a mixture of two or more kinds of polyolefins having different intrinsic viscosities. Are preferred. More preferably, the intrinsic viscosity [η] measured in a decalin solvent at 135 ° C.
Is in the range of 7 to 40 dl / g, preferably 10 to 35 dl / g, and the intrinsic viscosity [η] measured in a decalin solvent at 135 ° C. is 0.1 to 5 d.
A polyolefin composition consisting essentially of a low molecular weight to high molecular weight polyolefin in the range of 1 / g, preferably 0.1 to 2 dl / g, wherein the ultrahigh molecular weight polyolefin is combined with the ultrahigh molecular weight polyolefin and It is present in a proportion of 15 to 40% by weight, preferably 18 to 35% by weight, based on 100% by weight of the total weight of the high-molecular-weight polyolefin, and has an intrinsic viscosity [η] measured in a decalin solvent at 135 ° C. A polyolefin composition in the range of 5-8.3 dl / g.

An ultrahigh molecular weight polyolefin as described above,
And, the low molecular weight to high molecular weight polyolefin is, for example, ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 1-decene, 1-dodecene,
Α such as 4-methyl-1-pentene and 3-methyl-1-pentene
-Consisting of olefin homopolymer or copolymer. In the present invention, an ethylene homopolymer and a copolymer containing ethylene and another α-olefin and containing ethylene as a main component are preferable.

Further, as the polyolefin resin (D) used in the present invention, two or more of the polyolefins mentioned above as preferred examples can be used in combination. Preferably, the crystalline polyolefin used in the above-mentioned polyolefin-based thermoplastic elastomer (A) and 135 ° C.
The intrinsic viscosity [η] measured in decalin solvent is 3.5 to 3.5.
It is desirable to use a polyolefin in the range of 8.3 dl / g in combination.

Such a polyolefin resin (D) is
5 to 150 parts by weight, preferably 10 to 100 parts by weight, per 100 parts by weight of the olefinic thermoplastic elastomer (A)
Used in parts by weight.

Fluoropolymer (E) In the present invention, the fluoropolymer (E) can be further blended into the resin composition for a skin member. As this fluorine-based polymer, one having a molecular weight of 1 × 10 ⁴ to 1 × 10 ⁸ , preferably 1 × 10 ⁵ to 1 × 10 ⁷ is used.

Specific examples of the fluoropolymer (E) include polytetrafluoroethylene, tetrafluoroethylene-hexafluoropropylene copolymer, tetrafluoroethylene-perfluorovinyl ether copolymer, and tetrafluoroethylene-ethylene copolymer. Coalescence, vinylidene fluoride polymer, vinylidene fluoride-hexafluoropropylene copolymer, tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer,
And vinyl fluoride polymers. Among these, a vinylidene fluoride-hexafluoropropylene copolymer and a tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer are preferred.

Such a vinylidene fluoride-hexafluoropropylene copolymer and tetrafluoroethylene
When a hexafluoropropylene-vinylidene fluoride copolymer is used, a skin member with less occurrence of eye drop can be obtained.

The fluorine-based polymer (E) used here may be used in advance to improve the dispersibility with the olefinic thermoplastic elastomer or to further enhance the effect of improving the sliding wear property. It may be a master batch with a known inorganic filler.

The fluoropolymer (E) is used in an amount of 0.5 to 10 parts by weight, preferably 0.5 to 7 parts by weight, based on 100 parts by weight of the olefinic thermoplastic elastomer (A). Can be

The resin composition according to the present invention comprises an olefinic thermoplastic elastomer (A), an organopolysiloxane (B) having a viscosity of 1,000,000 cSt or more, and a viscosity of 10
Organopolysiloxane (C) of less than 1,000,000 cSt
Or a mixture of these mixtures further containing a polyolefin resin (D) and a fluoropolymer (E), in the same manner as in obtaining the above-mentioned olefinic thermoplastic elastomer (A), Obtained by dynamic heat treatment.

The above resin composition may optionally contain a mineral oil-based softener, a heat stabilizer, an antistatic agent, a weather stabilizer,
Additives such as an antioxidant, a filler, a coloring agent, a lubricant and the like can be blended within a range that does not impair the purpose of the present invention.

The laminate according to the present invention can be obtained by laminating a thermoplastic elastomer as a core and the above resin composition as a skin member. The lamination method depends on the shape, size and required physical properties of the final product.
Although not particularly limited, for example, there is a method in which a core body and a skin member are simultaneously extruded by a multilayer extruder and thermally fused. Such a method of heat fusion does not require an adhesive,
The laminate can be obtained in one simple step, and the interlayer adhesion between the core and the skin member is strong.

Such a laminate of a thermoplastic elastomer is suitable for a glass run channel, a window molding, a side molding, and the like, for example, in an automobile part.

[0060]

According to the present invention, it is possible to prepare a laminate excellent in appearance, with a small amount of die build-up during extrusion molding, while maintaining high performance in sliding properties and abrasion resistance with glass. A resin composition for a skin member and a laminate using the same are obtained.

Hereinafter, the present invention will be described with reference to Examples.
The present invention is not limited to these examples.

[0062]

Examples: Ethylene content 70 mol%, iodine value 12,
Mooney viscosity ML _{1 + 4} (100 ℃)
65 parts by weight of a propylene / 5-ethylidene-2-norbornene copolymer rubber and MFR (ASTM D1238-6)
5T, 230 ° C) 13 g / 10 min, density 0.91 g / c
After kneading 35 parts by weight of m ³ polypropylene in a nitrogen atmosphere at 180 ° C. for 5 minutes using a Banbury mixer, the kneaded material is passed through a roll to form a sheet, which is cut by a sheet cutter and cut into square pieces. Pellets were produced.

Next, this square pellet and 1,3-bis (t
tert-butylperoxyisopropyl) benzene 0.
2 parts by weight and 0.2 parts by weight of divinylbenzene were stirred and mixed with a Henschel mixer.

Next, this mixture was extruded at 220 ° C. in a nitrogen atmosphere using a twin screw extruder having an L / D of 40 and a screw diameter of 50 mm to obtain an olefin-based thermoplastic elastomer (a).

The gel content of the obtained olefinic thermoplastic elastomer (a) was determined by the above method.
It was 78% by weight.

Next, the olefin-based thermoplastic elastomer (a) and the following raw materials were kneaded at a ratio shown in Table 1 by a twin-screw extruder to obtain pellets of a resin composition. Organopolysiloxane (b) Silicone oil manufactured by Dow Corning Toray Co., Ltd.
Polypropylene master batch BY27-002 [Ultra high molecular weight silicone oil content 50% by weight, type of silicone oil; dimethylpolysiloxane] Organopolysiloxane (c) Silicone oil manufactured by Dow Corning Toray Co., Ltd.
SH200 [3000 cSt, type of silicone oil; dimethylpolysiloxane] polyolefin resin (d-1) MFR (ASTM D1238-65T, 230 ° C)
Polypropylene resin (d-2) having a density of 0.91 g / cm ³ and a density of 13 g / 10 min. The intrinsic viscosity [η] measured in a decalin solvent at 135 ° C. is 2
8 dl / g ultra-high molecular weight polyethylene 23% by weight;
The intrinsic viscosity [η] measured in a decalin solvent at 35 ° C. is 0.
Polyethylene composition composed of 73 dl / g low molecular weight polyethylene 77% by weight (intrinsic viscosity [η] measured at 135 ° C. in decalin solvent is 7.0 dl / g) Fluorine-based polymer (e) manufactured by Sumitomo 3M Ltd. Dynamer FX-9613
(Fluorine-based polymer content: 90%, type of fluorine-based polymer; vinylidene fluoride-hexafluoropropylene copolymer)

Further, injection molding was performed using pellets of the resin composition to obtain a test piece of 150 mm × 120 mm × 3 mm. Using this test piece, the friction coefficient was measured and the sliding wear property was evaluated. The evaluation method is shown below, and the results are shown in Table 1. Coefficient of friction According to ASTM D1894-75. Under a load of 200 g, the coefficient of kinetic friction and the coefficient of static friction with glass were measured. Sliding wear property As shown in FIG. 1, a glass wear element (width 20 mm, height 30 mm, thickness 4.5 mm) was brought into contact with the surface of an injection-molded test piece of a resin composition. A 3 kg load was applied to the glass wear element and a sliding test was performed 10,000 times with a stroke of 100 mm, and the wear depth (μm) of the sample was measured.

Using a pellet of the obtained resin composition, a single-screw extruder having a full flight screw having a screw diameter of 50 mm, an L / D of 28 and a compression ratio of 4.0, and an opening 25 mm attached thereto Using a 1 mm die, set the die exit from the introduction part of the single screw extruder to 160
The tape-shaped molded product was extruded at a rate of 12 kg / hr for 30 to 90 minutes by raising the temperature of the gradient to a temperature of from 210C to 210C, and the weight was weighed. In addition, the amount of eye tan was converted into the amount at the time of 1 ton extrusion and expressed. Table 1 shows the results.

Gradient heating Set temperature of each zone (C1 to C4), head (H) and die (D) C1 / C2 / C3 / C4 / H / D = 160/170/1
80/190/200/210 (° C)

[0070]

Comparative Examples 1-4 Resin compositions were prepared in the same manner as in Examples except that the olefin-based thermoplastic elastomer (a), the organopolysiloxane (b) and the organopolysiloxane (c) were used in the proportions shown in Table 1. Was manufactured and molded, and the coefficient of friction was measured, and the sliding abrasion property and the eye drop were evaluated. Table 1 shows the results. In Comparative Example 4, the organopolysiloxane (b) was not used.

[0071]

[Table 1]

Each of the compositions shown in the above Examples and Comparative Examples was composed of 0.1 part by weight of a heat stabilizer, 0.2 part by weight of a weather stabilizer (ultraviolet absorber) and a weather stabilizer (light stabilizer).
0.1 parts by weight was added.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view for explaining a method for measuring the sliding wear property of an injection molded test piece of a resin composition for a skin member according to the present invention.

[Explanation of symbols]

 1 ... test piece 2 ... glass wear element

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kunihiko Mizumoto 3 Chizukaigan, Ichihara-shi, Chiba Mitsui Chemicals Co., Ltd. In company

Claims (5)

[Claims] (1) 100 parts by weight of a completely or partially crosslinked olefinic thermoplastic elastomer (A) and a viscosity [JIS K
2283, 25 ° C.] of 2 to 20 parts by weight of an organopolysiloxane (B) having 1 × 10 ⁶ cSt or more, and a viscosity [JIS K2283, 25 ° C.]
And 0.5 to 5 parts by weight of an organopolysiloxane (C) having cSt of less than 10 to 1 × 10 ⁶ . 2. 100 parts by weight of a completely or partially crosslinked olefinic thermoplastic elastomer (A) and a viscosity [JIS K
2283, 25 ° C.] of 2 to 20 parts by weight of an organopolysiloxane (B) having 1 × 10 ⁶ cSt or more, and a viscosity [JIS K2283, 25 ° C.]
A resin composition for a skin member, comprising 0.5 to 5 parts by weight of an organopolysiloxane (C) having a cSt of less than 10 to 1 × 10 ⁶ and 5 to 150 parts by weight of a polyolefin resin (D). 3. The organopolysiloxane (B) has a viscosity of 1 × 10 ⁶ to 1 × 10 ⁸ cSt.
The resin composition for a skin member according to the above. 4. The resin composition for a skin member according to claim 1, further comprising a fluoropolymer (E). 5. A laminate formed by laminating a skin member comprising the composition according to claim 1 on a core comprising a thermoplastic elastomer.