JPH09263678A - Flexible composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a flexible composition excellent in flexibility, low-molecular compound retaining and dynamic properties, hot-melt tackiness and adhesion and liquid retaining properties by blending a hydrogenated block copolymer having a specific structure with a liquid additive. SOLUTION: This flexible composition comprises (I) 1-50wt.% hydrogenated block copolymer, prepared by hydrogenating olefinically unsaturated bonds in a block copolymer having at least one each of (A) a polybutadiene block polymer block having 5-25% content of 1,2-bonds and (B) a polymer block, having 25-95wt.% content of a conjugated diene having unsaturated bond in the side chain based on the amount of the total conjugated dienes in the block at (100/0) to (50/50) weight ratio of the conjugated diene to other monomers and (II) 99-50wt.% liquid additive.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soft composition used in various industrial equipment, transportation equipment, home appliances, stationery, sports equipment, leisure goods, and civil engineering / construction fields.

[0002]

2. Description of the Related Art Low hardness materials typified by rubber have been used in various fields. Further, in recent years, further low hardness materials have been demanded, but with general polymer materials, there is a limit to the hardness that can be reached, and it is difficult to achieve compatibility with molding processability. In response to such a demand, a material in which a low molecular weight material such as a softening agent is added to a polymer material has been developed, but the flexibility and the shape retaining property are not sufficient. on the other hand,
One of the typical applications of combining a high molecular weight material and a low molecular weight material is a hot melt adhesive / adhesive application, and a material that achieves both the above properties and hot melt adhesiveness / adhesiveness is
Never before.

[0003]

SUMMARY OF THE INVENTION The present invention has been made against the background of the above-mentioned problems of the prior art. By blending a hydrogenated block copolymer having a specific structure and a liquid additive, flexibility and low molecular weight retention are provided. It is an object of the present invention to provide a soft composition having excellent mechanical properties, hot melt viscosity / adhesiveness, and liquid retention.

[0004]

The present invention provides (a) 1, 2
A polybutadiene polymer block (A) with a bond content of 5 to 25% in the block, and a weight ratio of conjugated diene to other monomers of 100/0 to 50/50 and having unsaturated bonds in the side chains. In a block copolymer having at least one polymer block (B) having a conjugated diene content of 25 to 95% by weight based on the total amount of conjugated dienes in the block, hydrogen is used as an olefinic unsaturated bond. The present invention provides a soft composition containing 1 to 50% by weight of a hydrogenated block copolymer obtained by converting the compound to (B) and 99 to 50% by weight of a liquid additive (B).

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Component (A) The component (A) in the composition of the present invention is a polymer mainly composed of a polybutadiene polymer block (A) (hereinafter also referred to as “block (A)”) and a conjugated diene. A hydrogenated block copolymer obtained by hydrogenating a block copolymer (hereinafter also referred to as "pre-hydrogenation copolymer") having at least one block (B) (hereinafter also referred to as "block (B)"). is there.

In the block (A), the polybutadiene has a 1,2-bond content of 5 to 25%. Therefore, the block (A) becomes a crystalline block having a structure similar to that of the ethylene-butene copolymer by hydrogenation. The 1,2-bond content in the block (A) is 5 to 25%, preferably 10 to 20%, more preferably 10 to 16%. When the content of 1,2-bond in the block (A) is less than 5%, flexibility and hot melt viscosity / adhesion are deteriorated, while when it exceeds 25%, mechanical properties and shape retention are deteriorated, which is not preferable. .

In the block (B), the conjugated diene moieties (1,2- and 3, having an unsaturated bond in the side chain).
The ratio of 4-bond, hereinafter also referred to as “vinyl bond”) is 2
5 to 95%. Therefore, the block (B) becomes a polymer block having a structure similar to that of a rubber-like ethylene-butene copolymer block when hydrogenated, for example, when the conjugated diene is 1,3-butadiene. When the vinyl bond content is 25 to 60%, particularly 30 to 50%, a composition having extremely excellent mechanical properties can be obtained. Further, when the vinyl bond content is 60 to 95%, particularly 70 to 90%, a composition having excellent flexibility and hot melt viscosity / adhesiveness can be obtained. The vinyl bond content in the block (B) is 25%
When the amount is less than 95% or more than 95%, after hydrogenation, crystal structures derived from polyethylene chain and polybutene-1 chain are exhibited, respectively, so that shape retention and hot melt viscosity / adhesiveness are deteriorated.

The conjugated diene used in the block (B) is 1,3-butadiene, isoprene,
2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, 2-methyl-1,3-pentadiene, 1,3
One or more of hexadiene, 4,5-diethyl-1,3-octadiene, chloroprene and the like can be mentioned, but in order to obtain a composition which can be industrially used and has excellent physical properties, 1,3 -Butadiene, isoprene, 1,3-
Pentadiene is preferable, and 1,3-butadiene and isoprene are more preferable.

Other monomers that may be used in the block (B) include styrene, t-butylstyrene, α-methylstyrene, p-methylstyrene, divinylbenzene, N, N-diethyl-p-. Aminostyrene, vinyl pyridine, etc. are mentioned, especially styrene, α
-Methylstyrene is preferred. In the block (B), when the conjugated diene is copolymerized with another monomer, the distribution of the conjugated diene is random, tapered (in which the monomer component increases or decreases along the molecular chain), or partially block-shaped. , Or any combination thereof.

The weight ratio of conjugated diene / other monomer in the block (B) is 100/0 to 50/50, preferably 100/0 to 70/30, more preferably 100.
/ 0 to 90/10. Outside this range, flexibility,
Low molecule retention and hot melt viscosity / adhesion are reduced.

The structure of the pre-hydrogenation copolymer of the component (a) used in the present invention may be any structure as long as it satisfies the above requirements, for example, the general formula (AB) _n1 (AB ) _N2- A ( _BA ) _n3- B [wherein A is block (A), B is block (B), n
1 to n3 represents an integer of 1 or more] and the like. As the component (a) of the present invention, a copolymer composed of blocks of triblock or more is preferable because it is particularly excellent in shape retention and mechanical properties. Therefore, in the above general formula, n1 is particularly preferably an integer of 2 or more.

Further, the copolymer before hydrogenation of the component (a) may be one in which the polymer molecular chain is extended or branched via a coupling agent residue as shown in the following formula. . _{(A-B) m X (} B-A) m X in _{(A-B-A) m} X (B-A-B) m X [wherein, A-B are as defined above, m is an integer of 2 or more , X represents a coupling agent residue. Here, especially when m is 3 or more, a composition excellent in shape retention, hot melt viscosity and adhesiveness can be obtained.

Examples of the coupling agent in this case are 1,2-dibromoethane, methyldichlorosilane, trichlorosilane, methyltrichlorosilane, tetrachlorosilane, tetramethoxysilane, divinylbenzene,
Diethyl adipate, dioctyl adipate, benzene-1,2,4-triisocyanate, tolylene diisocyanate, epoxidized 1,2-polybutadiene, epoxidized linseed oil, tetrachlorogermanium, tetrachlorotin, butyltrichlorotin, Butyltrichlorosilane, dimethylchlorosilane, 1,4-chloromethylbenzene, bis (trichlorosilyl) ethane and the like can be mentioned.

The component (a) of the present invention contains a block containing more than 50% by weight of a monomer other than the conjugated diene, if the structure of the copolymer before hydrogenation satisfies the above requirements. It is also possible to do so. Here, as the other monomer, the same ones as described above are used. That is,
Structure before hydrogenation copolymer, for example, in the formula _{(A-B-C) n} (A-B-C) m X (A-B-C) X (C-B) ( wherein, A-B , M and X are the same as described above, n is an integer of 1 or more, and C is a block containing 50% by weight or more of a monomer other than the conjugated diene.). As the coupling agent in this case, the same one as described above is preferably used. For example, when a polystyrene block is used as the block (C), a composition having good hot melt viscosity and adhesiveness can be obtained.

As the pre-hydrogenation copolymer of the component (a) of the present invention, the above copolymers can be used alone, but blends of two or more can also be preferably used. Specific examples thereof include ABAA / AB and (AB-
B) ₂₋ X / A−B, (A−B) ₄₋ X / A−B, (A
-B) _4- X / (AB) _2- X / AB, (AB)
_4- X / (AB) _3- X / (AB) _2- X / AB
(However, A, B, and X are the same as the above) and the like, and a blend of two or more block copolymers.

Further, a blend of two or more components (a) with each other, for example, a hydrogenated product of ABA / A-
B hydrogenated product, (AB) _2- X hydrogenated product / AB hydrogenated product, (AB) _4- X hydrogenated product / AB hydrogenated product, (A
-B) _4- X hydrogenated product / (AB) _2- X hydrogenated product / A
-B hydrogenated product, (A-B) _4- X hydrogenated product / (A-B)
_3- X hydrogenated product / (AB) _2- X hydrogenated product / AB hydrogenated product (however, A, B, and X are the same as above) and the like are also (a) of the present invention. It is preferably used as a component. As described above, as the component (a) of the present invention, a polymer composed of blocks of triblock or more is particularly preferable. Therefore, when the component (a) is composed of two or more components including a hydrogenated product of the AB diblock copolymer, (a)
The ratio of this diblock hydrogenated product in the components is 50.
% By weight or less is particularly preferred.

The content of the block (A) in the copolymer before hydrogenation is preferably 5 to 90% by weight, more preferably 5 to 85% by weight, and the content of the block (B) is preferably 95. 10 to 10% by weight, more preferably 95 to 15% by weight. The content of the block (A) is less than 5% by weight [that is, the content of the block (B) is 95% by weight.
When the content of block (A) exceeds 90% by weight, that is, the content of block (A) exceeds 90% by weight (that is, the content of block (B) is less than 10% by weight). In that case, the flexibility is poor and the low molecular weight retention is insufficient. When the component (a) of the present invention contains the block (C), the content of the block (C) in the component (i) is preferably 70% by weight or less,
60% by weight or less is more preferable, and 55% by weight or less is particularly preferable [(A) + (B) + (C) = 100
weight%〕. When the content of the block (C) exceeds 70% by weight, the resulting composition has poor flexibility, low molecule retention, mechanical properties, hot melt viscosity / adhesion and liquid retention.

In the hydrogenated block copolymer (b) of the present invention, the hydrogenation rate of the olefinic unsaturated bond (the double bond of the butadiene portion and / or the conjugated diene portion) is preferably 80% or more, more preferably Is 85% or more, particularly preferably 90% or more. If this hydrogenation rate is less than 80%, the shape retention and mechanical properties will be poor. The component (a) in the composition of the present invention has a polystyrene-equivalent weight average molecular weight of 10,000 to 700,000, preferably 2
It is 10,000 to 600,000, and more preferably 30,000 to 500,000. 1
If it is less than 10,000, the mechanical properties of the composition will be poor, while if it exceeds 700,000, the hot-melt viscosity / adhesiveness and processability will be poor. Further, the hydrogenated block copolymer (a) of the present invention can be used as a modified hydrogenated block copolymer by introducing at least one kind of functional group into the hydrogenated block copolymer. The (a) hydrogenated block copolymer of the present invention is disclosed, for example, in JP-A-2-133406 and JP-A-3.
It can be obtained by the methods disclosed in JP-A-128957 and JP-A-5-170844.

(B) Component As the (B) liquid additive in the composition of the present invention, various known materials which are liquid or paste at room temperature are preferably used. Specific examples of the component (b) include various lubricants for plastics and rubbers, plasticizers and softeners. Here, examples of the lubricant include paraffin lubricant, hydrocarbon lubricant, metal soap and the like. As the plasticizer, phthalic acid derivatives, isophthalic acid derivatives,
Examples thereof include various fatty acid derivatives such as tetrahydrophthalic acid derivative, adipic acid derivative, sebacic acid derivative, fumaric acid derivative and citric acid derivative. Further, as the softener, paraffin-based process oil, naphthene-based process oil, petroleum-based softeners such as aromatic process oil, ethylene-α-olefin coolomers, gilsonite, mineral oil-based softeners such as asphalt, Examples include vegetable oil softeners such as olive oil, soybean oil, castor oil, and linseed oil, and fatty acids such as oleic acid and ricinoleic acid.

Also, various liquid oligomers other than the above are
It is preferably used as the component (b). Here, examples of the oligomer include polyisobutylene and various liquid rubbers (such as polybutadiene and styrene-butadiene rubber). Furthermore, silicone oil, latex, emulsion, various organic solvents, various aqueous solutions, various animal oils, various medicinal components, squalane, aromatic components, insecticides, soil conditioners, edible oils, various sugars, etc. are also used as the (b) component. . These (b) components may be used alone or in combination of two or more.

Component (a) in the composition of the present invention /
The mixing ratio of the component (b) is 1 to 50/99 to 5 by weight.
0, preferably 1-40 / 99-40. When the amount of the component (a) is less than 1% by weight, the mechanical properties are deteriorated and it is difficult to maintain the shape of the composition. On the other hand, when it exceeds 50% by weight, the flexibility is insufficient.

As a component constituting the composition of the present invention, a thermoplastic polymer or rubber-like polymer other than the above-mentioned components (a) to (b), such as polyethylene, ethylene-propylene copolymer, ethylene-1-butene. Copolymer, ethylene-1-
Ethylene-α-olefin copolymers such as hexene copolymer, ethylene-1-octene copolymer, ethylene-propylene- (ethylidene-2-norbornene) copolymer, ethylene-1-butene- (ethylidene-2-) Norbornene) copolymer etc. ethylidene-α-olefin-
Non-conjugated diene copolymer, polypropylene, polybutene,
Propylene-1-butene copolymer, poly-4-methyl-
Polymethylpentenes such as 1-pentene, ethylene-
Ethylene-cyclic olefin copolymers such as norbornene copolymers, polyacrylic acid alkyl esters such as polystyrene, polymethyl acrylate and polyethyl acrylate, polymethacrylic acid alkyl esters such as polymethyl methacrylate and polyethyl methacrylate , Styrene-butadiene copolymer, styrene-isoprene copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-acrylic acid copolymer,
An ethylene-methacrylic acid copolymer, an ethylene-methyl acrylate copolymer, an ethylene-methyl methacrylate copolymer, an ethylene-ethyl acrylate copolymer, an acrylic rubber, an ethylene-based ionomer and the like can also be blended. Further, a thermosetting polymer such as an epoxy resin, a phenol resin or a silicone resin may be blended within a range that does not impair the characteristics of the composition of the present invention.

In addition to the above-mentioned components (a) to (b) and the above-mentioned various components, the soft composition of the present invention may further contain an antioxidant, an antistatic agent, a weathering agent, UV absorbers, anti-blocking agents, crystal nucleating agents, flame retardants, vulcanizing agents, vulcanizing aids, antibacterial / antifungal agents, dispersants, anti-coloring agents,
Colorants such as foaming agent, titanium oxide, carbon black,
Metal powder such as ferrite, glass fiber, inorganic fiber such as metal fiber, organic fiber such as carbon fiber and aramid fiber,
Inorganic whiskers such as glass beads, glass balloons, glass flakes, asbestos, calcium carbonate, magnesium carbonate, potassium titanate whiskers, zinc oxide whiskers, talc, silica, calcium silicate, kaolin, diatomaceous earth, montmorillonite, graphite, pumice, evo Powder, cotton floc, cork powder, barium sulfate, filler such as fluororesin, etc., alone or in combination with 2
It is also possible to mix and use one or more kinds as appropriate.

The composition of the present invention is a blend of a polymeric material and a material that inherently has a low viscosity at high temperatures. Therefore, for mixing the respective components, a device capable of stirring the liquid material at high speed is preferable. Specifically, the composition of the present invention contains the above-mentioned component (a) and component (b) and, if necessary, other additives by using a homomixer or the like at a rotation speed of 100 rpm.
Above, preferably, it is prepared by stirring under high speed shear of 500 rpm or more. A molded product of the composition of the present invention can be easily manufactured by a conventionally known processing method such as compression molding or injection molding. If necessary, processing such as foaming, adhesion, coloring, printing, painting, etc. can be performed. Furthermore, the composition of the present invention may be subjected to crosslinking such as sulfur crosslinking, peroxide crosslinking, metal ion crosslinking, silane crosslinking, etc., by a conventionally known method, if necessary.

[0025]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples. However, unless the gist of the present invention is exceeded, the present invention
It is not limited by such an embodiment. In the examples, parts and percentages are by weight unless otherwise specified. Various measurements in the examples were based on the following methods.

1,2-bond content (vinyl bond content ) The 1,2-bond content and the vinyl bond content (1,2- and 3,4-bond bond content) are determined by an infrared analysis method and a Hampton method. It was calculated. Bound styrene content For components containing styrene units in the molecular chain, 6
Based on the absorption of the phenyl group at 79 cm ^-1 , the bound styrene content was measured by infrared analysis.

Hydrogenation rate The hydrogenation rate of the conjugated diene is 10% with ethylene tetrachloride as a solvent.
Calculated from ⁰ MHz, ¹ H-NMR spectrum. Weight average molecular weight The weight average molecular weight (hereinafter, also referred to as “molecular weight”) is measured by gel permeation chromatography [GPC, column;
It was calculated in terms of polystyrene by using GMH _HR- H] manufactured by Tosoh Corporation.

Shape Retaining A cubic test piece having a side length of 5 cm was heat-treated in a gear oven at 85 ° C. for 24 hours, and the change in shape of the test piece before and after heat treatment was visually observed and the test piece height retention rate (height before treatment). The ratio was evaluated according to the following criteria. 5: No change is observed in the shape of the test piece before and after the heat treatment. 4; A slight change is seen in the shape of the test piece before and after the heat treatment. 3: The shape is cubic or rectangular, but the shape is changed. The test piece height retention rate is 70% or more. 2; The shape is cubic or rectangular, but the shape is changed. Retention rate of test piece height is 30% or more,
It is less than 70%. 1; The shape change is remarkable, such as the test piece flowing. The retention rate of the test piece height is less than 30%.

Flexibility JIS-A hardness was measured and evaluated according to the following criteria. 5: JIS-A hardness is 20 or less. 4; JIS-A hardness is more than 20 and 25 or less. 3; JIS-A hardness is more than 25 and 30 or less. 2; JIS-A hardness is more than 30 and 60 or less. 1; JIS-A hardness exceeds 60.

Mechanical Properties Tensile elongation at break (EB) according to JIS K6301
Was measured and evaluated according to the following criteria. 5; EB is 1,000% or more. 4; EB is 950% or more and less than 1,000%. 3; EB is 900% or more and less than 950%. 2; EB is 800% or more and less than 900%. 1; EB is less than 800%.

Hot Melt Viscosity / Adhesiveness (HMA Property ) The fluidity at high temperature (100 to 150 ° C.) and the viscosity / adhesive strength at room temperature were measured and evaluated according to the following criteria. 5: Good fluidity at high temperature, and extremely excellent viscous / adhesive strength at room temperature. 4; Adhesive strength at room temperature is good. 3; Good fluidity at high temperature, but good viscosity / adhesive strength at room temperature. 2; The fluidity and / or the tackiness / adhesiveness are not sufficient, but it can be used as a tackiness / adhesive. 1; Poor fluidity and / or viscous / adhesive property, and unusable as viscous / adhesive.

Liquid Retaining Property The test piece used for the evaluation of shape retaining property was heat-treated in a gear oven at 40 ° C. for 166 hours, and the appearance of the heat-treated test piece was visually observed and evaluated according to the following criteria. 5: No change is seen in the appearance of the test piece before and after the heat treatment. 3; After the heat treatment, slight bleeding is observed on the surface of the test piece. 1; Remarkable bleeding is observed on the surface of the test piece after the heat treatment.

Reference Example Various components used in the formulations shown in Examples and Comparative Examples are as follows. Hydrogenated block copolymer [(a) component ] A-1 to A-19; hydrogenated block copolymers having the microstructure, molecular weight and hydrogenation rate shown in Tables 1 to 5. A-20; hydrogenated styrene-butadiene-styrene triblock copolymer [manufactured by Shell Kagaku KK, KG1650,
Molecular weight = 98,000, 1,2-bond content = 35-40%] a-21; hydrogenated styrene-isoprene-styrene triblock copolymer [Kuraray Co., Ltd., Septon 2043,
Molecular weight = 105,000, polybutadiene part = none]

The molecular weights of a-20 and a-21 were determined by gel permeation chromatography (GPC) using tetrahydrofuran as a solvent in terms of polystyrene. Further, the 1,2-bond content of the butadiene portion described in the item A-20 is the same as that of the butylene content of A-20 by ¹³ C.
-Measured by NMR and calculated based on the value. Further, the validity of the calculated numerical value was confirmed from the shape of the thermogram in the differential scanning calorimetry. B-21
Since it does not have a structure derived from polybutadiene, only the molecular weight was measured.

Liquid additive [(b) component ] b-1; paraffinic process oil [Idemitsu Kosan Co., Ltd.
Manufactured by Diana Process Oil PW-90] b-2; naphthene-based process oil [Fuji Kosan Co., Ltd.]
Made by FUCKOL FLEX # 2050N] RO-3; aromatic type process oil [FUKOKORO AROMAX # 1 manufactured by Fuji Kosan Co., Ltd.] RO-4; silicone oil [Toray Dow Corning Silicone manufactured by SH550] B-5; adipic acid diester-based plasticizer [Sanso Sizer DIDA manufactured by Shin Nippon Rika Co., Ltd.]

Examples 1 to 12 The components (a) and (b) shown in Tables 6 to 7 were mixed in the weight ratios shown in the tables. For mixing, use a homomixer,
Temperature 120 ~ 170 ℃, Rotor speed = 2,500 ~
A composition was obtained by stirring at 3,500 rpm for 1 hour. This composition was further press-molded to prepare a test piece for evaluation of physical properties. The results of physical property evaluation are shown in Tables 6 to 7. Each of Examples 1 to 12 is a composition within the scope of the present invention, and has good shape retention, flexibility, mechanical properties, and HMA property.

Examples 13 to 15 For the formulations shown in Table 8, compositions were obtained in the same manner as above,
Physical properties were evaluated. These compositions are those in which the structure of the component (a) is within the range of the present invention, but deviate from the preferable range. It can be seen that any one or more of the shape-retaining property, the flexibility, the mechanical property and the HMA property, which is slightly lower, is slightly lower depending on the structure of each component (a).

Comparative Examples 1-9 For the formulations shown in Tables 9-10, compositions were obtained in the same manner as above, and the physical properties were evaluated. All of these compositions are outside the scope of the present invention. Comparative Example 1 is an example of only the component (b), but in addition to the shape-retaining property, all the physical properties are inferior. Further, Comparative Example 2 is an example of only the component (a), and the flexibility and mechanical properties are not sufficient.
Comparative Example 3 is a composition in which the composition ratio of the component (a) and the component (b) in the composition is outside the range of the present invention, and the flexibility and mechanical properties are not sufficient like Comparative Example 2. . Comparative Examples 4 to
9 is a composition in which the structure of the component (a) is outside the scope of the present invention. It can be seen that all of them are inferior in flexibility, HMA property, shape retention and the like.

[0039]

[Table 1]

* 1) BD; 1,3-butadiene

[0041]

[Table 2]

* 1) BD; 1,3-butadiene * 2) ST; styrene

[0043]

[Table 3]

* 1) BD; 1,3-butadiene * 2) ST; styrene

[0045]

[Table 4]

* 1) BD; 1,3-butadiene * 2) ST; styrene * 3) IP; isoprene

[0047]

[Table 5]

* 1) BD; 1,3-butadiene * 2) ST; styrene

[0049]

[Table 6]

[0050]

[Table 7]

[0051]

[Table 8]

[0052]

[Table 9]

[0053]

[Table 10]

[0054]

The soft composition of the present invention has excellent flexibility,
Low molecular weight retention, hot melt viscosity / adhesiveness, mechanical properties, formability, processability, low temperature characteristics, hot stamping properties, rubber elasticity, rubber feel, flexibility, etc. be able to. The composition of the present invention can be used as a rubber material having an extremely low hardness, as a rubber for a low hardness rubber roll for OA equipment, a seismic isolation rubber and the like.

As vibration-damping / damping / cushioning materials, sealing materials, packing, gaskets, fixing members such as grommets, support members such as mounts, holders and insulators, cushioning members such as stoppers, cushions and bumpers, vibration damping materials. Equipment for producing vibrations and sounds such as coolers, washing machines, refrigerators, fans, vacuum cleaners, dryers, printers, massage machines, bathtubs, blowers, etc. in the form of steel sheet materials, grabs, mits, golf clubs, etc. , Sports equipment such as grips such as tennis rackets, for insoles of shoes, various toys, various speakers, audio equipment such as CD players, electronic / electrical equipment, beds such as medical beds, barber / beauty beds, etc.,
Chairs, vehicle and aircraft seat materials, automobile interior materials, bicycles, tricycles, motorcycles, automobiles, amusement park ride handles and grips, cutting machines, grips for machines such as chainsaws, knee pads, knee pads, gloves, It can be used as a part that comes into contact with the body such as a helmet, a human body contact member of OA equipment, and a cushioning material for connecting to a human body of an artificial leg or artificial hand.

Further, by utilizing the sustained release property of low molecular weight materials, various sustained release materials such as aromatic agents, medical agents, functional materials, cosmetic puffs, heat storage / cooling materials, printing members, medicated clothing materials, It can be used as a cleaner and coater. In addition, it can be used as a medical device such as an electrode material for low frequency treatment, a biomimetic material, a functional material such as an electrolyte liquid film, a liquid crystal film, a paint film, various paving materials, and a surface transfer material. further,
It can be used for various purposes such as various stationery products such as mats, civil engineering and construction materials, food-related materials, and office equipment parts. Also, as a hot melt adhesive / adhesive, metal,
It can be used for thermal adhesion of various adherends such as plastic and wood.

Claims (1)

[Claims] (A) A polybutadiene polymer block (A) having a 1,2-bond content of 5 to 25% in the block, and a weight ratio of a conjugated diene to another monomer is 1.
00/0 to 50/50, and the content of the conjugated diene having an unsaturated bond in the side chain is 2 of the total conjugated diene amount in the block.
1 to 50% by weight of a hydrogenated block copolymer obtained by hydrogenating an olefinic unsaturated bond in a block copolymer having at least one polymer block (B) in an amount of 5 to 95% by weight. %, And (b) a liquid additive (99 to 50% by weight).