JP3465633B2 - Liquid polymer composition - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a liquid polymer composition.

[0002]

2. Description of the Related Art Conventionally, as a liquid polymer composition, a composition containing silicone rubber as a main component and carbon black, silica or the like mixed therein has been used (Japanese Patent Laid-Open No. 6-51622, Japanese Patent Publication No. 7-62122). No. 119365).

[0003]

However, since the above carbon black easily aggregates into lumps, the dispersibility of the carbon black in the silicone rubber is poor, and as a result, the above liquid polymer composition has a variation in electric resistance. It has the drawback of being large. Moreover, when the molding temperature at the time of molding the liquid polymer composition is high (about 150 ° C.), the viscosity of the silicone rubber is lowered, so that the carbon black is more likely to be aggregated, and as a result, the electric resistance depending on the molding conditions is increased. Is large and the stability of electric resistance is poor.

The present invention has been made in view of the above circumstances, and provides a liquid polymer composition having good dispersibility of carbon black, small variation in electric resistance, and excellent stability of electric resistance. To aim.

[0005]

In order to achieve the above object, the liquid polymer composition of the present invention is configured to contain the following components (A) and (B). (A) Liquid polymer. (B) Carbon black having silica fixed on its surface.

That is, the inventors of the present invention have conducted diligent research centering on carbon black in order to obtain a liquid polymer composition having excellent dispersibility of carbon black, small variation in electric resistance, and excellent stability of electric resistance. Layered. Then, it was found that when the surface of carbon black is treated with silica and carbon black having silica fixed on the surface is used, aggregation of carbon black can be suppressed. As a result, the liquid polymer composition using carbon black (component B) having silica fixed on the surface together with the liquid polymer (component A) has good dispersibility of carbon black in the liquid polymer (component A). Therefore, the inventors have found that the stability of the electric resistance is excellent because the dispersion of the electric resistance is small and the state of good dispersibility can be stably maintained.

If a hydrosilyl curing agent (C component) and a hydrosilylation catalyst (D component) are used together with the above-mentioned components A and B, the crosslinking rate at the time of molding is increased, which leads to an improvement in productivity. Further, if the A component and the D component are used as one liquid and the A component and the C component are used as different liquids and stored in a two-liquefied state, the storage stability is improved.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described.

The liquid polymer composition of the present invention can be obtained by using a liquid polymer (component A) and carbon black (component B) having silica fixed on the surface.

The liquid polymer (component A) is not particularly limited, but has an alkenyl group in the side chain derived from at least one of organopolysiloxane having at least two alkenyl groups in the molecule, butadiene and isoprene. Those having a structural unit (α) in the molecule, those having a structural unit (β) derived from styrene together with the above structural unit (α) in the molecule, saturated hydrocarbons having an alkenyl group at the side chain or both ends Polymers, polyoxyalkylenes and the like are preferably used. These may be used alone or in combination of two or more. Among them, those having the above structural unit (α) are preferable in terms of material cost.

Examples of the alkenyl group in the organopolysiloxane having at least two alkenyl groups in the molecule include vinyl group and isopropenyl group. The alkenyl group may be at both ends in the organopolysiloxane or in the molecular chain. Specific examples of the specific organopolysiloxane include polydimethylsiloxane having a vinyl group at both ends (DMS-V31 manufactured by Azumax Co.).

The structural unit (α) derived from at least one of butadiene and isoprene and having an alkenyl group in its side chain is not particularly limited and is represented by, for example, the following structural formulas (A) to (C). There is a structural unit. Then, the side chain alkenyl group (vinyl group, isopropenyl group) in the above structural unit is subjected to a crosslinking reaction, and 3
It has a three-dimensional mesh structure and exhibits rubber-like elasticity.

[0013]

[Chemical 4]

The liquid polymer (component A) having the structural unit (α) in the molecule is specifically isoprene rubber (IR), butadiene rubber (BR), IR
-BR copolymer rubber etc. are mentioned. These may be used alone or in combination of two or more.

Further, the styrene for deriving the specific structural unit (β) may have a substituent. As the substituent, an alkyl group is preferable, and a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group and the like having 1 to 5 carbon atoms are particularly preferable. It is an alkyl group.

As the liquid polymer (component A) having the structural unit (α) together with the structural unit (α) in the molecule, specifically, a copolymer of IR and styrene-butadiene copolymer rubber (SBR) is used. Examples thereof include polymers, copolymers of BR and SBR, copolymers of IR, BR and SBR, and the like. These may be used alone or in combination of two or more. Among the liquid polymers (component A) having the structural unit (β) together with the structural unit (α), those having a repeating unit represented by the following general formula (D) are preferably used.

[0017]

[Chemical 5]

The content ratio of the structural unit (α) is preferably set in the range of 0.5 to 80% by weight, particularly preferably 1.5 to 20% by weight, based on the whole liquid polymer (component A). . That is, when the content ratio of the structural unit (α) is less than 0.5% by weight, the crosslinking reaction may be insufficient, and the stability of the obtained molded crosslinked product may be deteriorated. If it exceeds%, the network structure due to crosslinking may become too dense, and the resulting molded crosslinked body may become hard or brittle. Further, if the amount of the cross-linking agent is reduced in order to prevent the cross-linked body from becoming hard, the cross-linking agent may react within one molecule of the polymer, which may prevent cross-linking.

The content ratio of the structural unit (β) is
It is preferably set in the range of 5 to 20% by weight, and particularly preferably 6 to 15% by weight, based on the whole liquid polymer (component A). That is, if the content ratio of the structural unit (β) is less than 5% by weight, the effect of styrene may not be sufficiently obtained. On the contrary, if it exceeds 20% by weight, the viscosity of the liquid polymer becomes high, resulting in moldability. Is likely to deteriorate and the compression set characteristics may deteriorate.

The liquid polymer (component A) having the above structural unit (α) and structural unit (β) can be produced, for example, as follows. That is, first, at least one of butadiene and isoprene and, if necessary, styrene are prepared as monomer components. Then, it can be obtained by homopolymerization or copolymerization using the above-mentioned monomer component in the presence of an appropriate catalyst (for example, a lithium-based catalyst or a Ziegler-based catalyst) by various methods such as anionic polymerization.

The viscosity of the liquid polymer (component A) is 1
The range of 0 to 3,000,000 (CPS / 25 ° C) is preferable,
Particularly preferably 1,000 to 500,000 (CPS / 25 ° C)
Is.

The number average molecular weight (Mn) of the liquid polymer (component A) is preferably 700 to 200,000, particularly preferably 2,000 to 100,000.

As the component B used together with the liquid polymer (component A), carbon black having silica fixed on its surface (hereinafter referred to as "silica-treated carbon black") is used. In the present invention, carbon black means carbon black in a broad sense, and is meant to include all those manufactured by the furnace method and the impact method, and specifically, furnace black and lamp black (direct combustion Formula black), thermal black (inert black), acetylene black, hard black, soft black, channel black (active black), roller black, disc black, granular black, dense black, pellet black and the like.

The silica-treated carbon black (component B) can be manufactured, for example, as follows. That is, first, carbon black is dispersed in water, and a dispersant (eg, methanol, various surfactants) is added to form a uniform slurry. Next, the pH of this slurry is adjusted to 6 or higher, preferably 10 to 11, and sodium silicate is hydrolyzed while maintaining the temperature at 70 ° C. or higher, preferably 85 to 95 ° C. to form amorphous silica on the surface of carbon black particles. Can be produced by depositing or depositing.

The silica-treated carbon black (B
The content of silica (Si) in the component) is 1 to the total amount of the component B.
The range of 25% by weight is preferable, and 3 to 10 is particularly preferable.
% By weight. That is, if it is less than 1% by weight, the effect of preventing aggregation in the polymer is insufficient, and conversely, if it exceeds 25% by weight, the effect on conductivity is reduced.

The silica-treated carbon black (B
The mixing ratio of the component) is 10 in the above liquid polymer (component A).
The amount is preferably 5 to 30 parts, and particularly preferably 10 to 20 parts, relative to 0 parts by weight (hereinafter abbreviated as "part").
That is, when the amount is less than 5 parts, the dispersed carbon black is present in the polymer in a scattered manner, so that conductivity is hardly exhibited and the aggregation of carbon black cannot be sufficiently suppressed. On the other hand, when it exceeds 30 parts, the volume ratio of carbon black in the liquid polymer increases, the viscosity increases, and the fluidity is not exhibited.

The silica-treated carbon black (B
The average particle size of the component) is preferably in the range of 0.01 to 0.3 μm, particularly preferably 0.02 to 0.1 μm.

In the liquid polymer composition of the present invention, it is preferable to use a hydrosilyl curing agent (C component) together with the above A component and B component. The hydrosilyl curing agent (component C) is not particularly limited and, for example, an organohydrogenpolysiloxane represented by the following general formula (4) is used.

[0029]

[Chemical 6]

The molecular structure of the specific organohydridogen polysiloxane is not particularly limited, and may be linear, branched, cyclic or network. The degree of polymerization of the specific organohydridogen polysiloxane is not particularly limited, but the viscosity at 25 ° C. is usually 2
Those in the range of 3 to 10,000 centistokes are preferable.

Among the above hydrosilyl hardeners, hydrocarbon-based hydrosilyl compounds represented by the following general formulas (1) to (3) are preferably used.

[0032]

[Chemical 7]

[0033]

[Chemical 8]

[0034]

[Chemical 9]

The hydrocarbon-based hydrosilyl compounds represented by the above general formulas (1) to (3) can be produced, for example, by the following methods (1) to (3). Among the above methods, the method shown in is particularly preferable because it can be carried out relatively easily.

A chlorosilyl group (SiC
l) a hydrocarbon-based compound having a reducing agent (LiAlH
₄ , NaBH ₄ etc.) to reduce the chlorosilyl group to a hydrosilyl group.

A hydrocarbon-based compound having a functional group,
A method for producing by reacting a compound having both a functional group capable of reacting with the above functional group and a hydrosilyl group.

A method for producing by reacting a hydrocarbon compound having an alkenyl group with a polyhydrosilane compound such that a hydrosilyl group remains in the molecular structure of the obtained reaction product.

Among the hydrocarbon-based hydrosilyl compounds thus obtained, the following structural formulas (5) to (9)
Those represented by are particularly preferable.

[0040]

[Chemical 10]

[0041]

[Chemical 11]

[0042]

[Chemical 12]

[0043]

[Chemical 13]

[0044]

[Chemical 14]

The hydrocarbon-based hydrosilyl compound, for example, the hydrocarbon-based hydrosilyl compound represented by the above structural formula (5) can be produced by the reaction shown below.

[0046]

[Chemical 15]

The mixing ratio of the hydrosilyl curing agent (component C) is preferably set in the range of 1 to 15 parts, and particularly preferably 2 to 8 parts, relative to 100 parts of the liquid polymer (component A). is there. That is, when the amount is less than 1 part, the crosslinking is not sufficiently performed, so that the strength and compression set are deteriorated. On the contrary, when the amount exceeds 15 parts, the crosslinking proceeds too much,
This is because it becomes hard and brittle, and the pot life becomes short.

In the liquid polymer composition of the present invention, it is preferable to use a hydrosilylation catalyst (D component) together with the above A to C components. The hydrosilylation catalyst (component D) is not particularly limited as long as it can exhibit a catalytic function for the crosslinking reaction, and examples thereof include chloroplatinic acid, complexes of chloroplatinic acid with alcohols, aldehydes, ketones, and platinum. / Vinyl siloxane complex, platinum / olefin complex, platinum / phosphite complex, platinum, alumina, silica, carbon black, and the like in which solid platinum is supported may be used. Examples of catalysts other than platinum compounds include palladium compounds, rhodium compounds, iridium compounds, ruthenium and the like. These may be used alone or in combination of two or more.

The liquid polymer composition of the present invention contains
In addition to the above components, a filler such as calcium carbonate, mica, silica, graphite, a plasticizer, an oil, a crosslinking accelerator, a crosslinking retarder, an antiaging agent, a coloring agent such as zinc oxide or titanium oxide, etc. are appropriately mixed. You may.

The liquid polymer composition of the present invention is, for example,
It can be prepared as follows. That is, first, a liquid polymer (component A) and silica-treated carbon black (component B), preferably the above-mentioned components A and B, and a hydrosilylation catalyst (component D) are mixed at an appropriate ratio to prepare a liquid base agent. A liquid curing agent containing a hydrosilyl curing agent (component C) is prepared. If necessary, other components are added to the liquid base agent and the liquid curing agent, respectively. Then, when used, it can be prepared by mixing a liquid main agent and a liquid curing agent. Thus, from the viewpoint of storage stability, the liquid polymer composition of the present invention is preferably prepared by separately storing the liquid main component and the liquid curing agent, and mixing both liquids at the time of use.

The application of the liquid polymer composition of the present invention is not particularly limited, and examples thereof include sheets, potting agents for electronic devices, sealing agents for construction, anti-vibration rubbers, gels for cushions, electrophotographic members, and moldings. It is preferably used as a rubber, adhesive, pressure-sensitive adhesive, coating agent and the like.

The liquid polymer composition of the present invention is
For example, it can be formed into a predetermined shape such as a sheet as follows. That is, the mold is set to a predetermined temperature (15
After heating to about 0 ° C.), a liquid polymer composition is cast into this mold, and crosslinking is performed under predetermined conditions, whereby a molded product such as a sheet can be produced.

Molded products such as sheets thus obtained
Has an electrical resistance of 1 × 10^Four~ 1 x 10⁹Ω · cm range
Is preferably set to 1.
10 ⁶~ 1 x 10⁷Ω · cm.

Next, examples will be described together with comparative examples.

First, prior to Examples and Comparative Examples, silica-treated carbon black shown below was prepared.

[Silica-treated carbon black a] Carbon black (manufactured by Mitsubishi Chemical Corporation, Diablack # 30)
Weigh 500 parts of 30), wet with 1000 parts of a mixed solution of methanol and water [methanol: water = 1: 9 (weight ratio)], add 4000 parts of water, and homogenize with an attritor filled with steel balls. Disperse well until it becomes a viscous slurry. The slurry was then separated from the steel balls through a screen and diluted to a volume equivalent to 10,000 parts of water. Then, after heating the slurry to 90 ° C., the pH was adjusted to 10.
Adjusted to 0. Next, two types of solutions were prepared separately. (A) Add 167 parts of No. 3 sodium silicate solution to 1000 parts of water
It was diluted with water to a volume corresponding to parts. (B) 1000 parts of a 2.50% sulfuric acid solution, and then a slurry having the above pH adjusted to 10.0,
50 parts of the diluted sodium silicate solution of (a) was added within 30 seconds to adjust the pH of the slurry to 11.0. This p
After continuing stirring for 10 minutes while maintaining at H, 50 parts of the sulfuric acid solution of (b) was added within 30 seconds, and the pH of the slurry was adjusted to 8.
Adjusted to 5. Repeat this addition method 20 times,
The addition of both solutions (a) and (b) was completed. The mixture was further stirred for 1 hour, and diluted sulfuric acid was added to adjust the pH to 6.5 to 7.0. The target silica-treated carbon black a (Si content 10% by weight) was produced by filtering the slurry, washing it until the soluble salt was eliminated, and drying it.

[Silica-treated carbon black b] (a) except that the No. 3 sodium silicate solution was changed to 83.3 parts and (b) the 2.50% sulfuric acid solution was changed to 500 parts. Silica-treated carbon black b (Si content 5.0% by weight) was obtained in the same manner as in.

[Silica-treated carbon black c] (a) Above, except that the No. 3 sodium silicate solution was changed to 16.7 parts and (b) the 2.50% sulfuric acid solution was changed to 100 parts. Silica-treated carbon black c (Si content 1.0% by weight) was obtained in the same manner as in.

[0059]

Example 1 Polydimethylsiloxane having vinyl groups at both ends as the component A (DMS-V manufactured by Azumax Co., Ltd.)
31) [viscosity: 1000 CPS / 25 ° C.] 100 parts,
10 parts of silica-treated carbon black b as the B component, 5 parts of hydrosilyl curing agent (TSF484 manufactured by Toshiba Silicone Co., Ltd.) as the C component, and hydrosilylation catalyst as the D component [platinum carbonyl complex (Smax manufactured by Azumax, S
IP 6829.0)] and 30 parts of acetylene alcohol [3,5-dimethyl-1-hexyn-3-ol (DMHO)] were used to prepare a liquid polymer composition according to the method described above.

[0060]

Example 2 Liquid butadiene rubber (Kuraray Co., Ltd., Kuraprene LIR-300) [Mn: 40000] as component A
0, content ratio of structural unit (α): 8% by weight, viscosity: 17
100 parts of CPS / 25 ° C.], 10 parts of silica-treated carbon black b as the B component, and a hydrosilyl curing agent as the C component (TSF484 manufactured by Toshiba Silicone Co., Ltd.)
5 parts and a hydrosilylation catalyst as a D component [platinum carbonyl complex (manufactured by Azumax Co., SIP 6829.
0)] 30 ppm and acetylene alcohol (DMH
O) 0.05 part and a plasticizer [paraffin oil (manufactured by Idemitsu Kosan Co., Ltd., Diana Process PS-32)] 30 parts were used to prepare a liquid polymer composition according to the above-mentioned method.

[0061]

Example 3 As component A, isoprene: styrene = 9
0:10 (weight ratio) isoprene-styrene copolymer liquid rubber (Kuraray Co., Ltd., Kuraprene LIR-310).
[Mn: 30,000, content ratio of structural unit (α): 7
% By weight, viscosity: 900,000 CPS / 25 ° C.] 100 parts, B
10 parts of silica-treated carbon black b as a component, 5 parts of a hydrosilyl curing agent (TSF484 manufactured by Toshiba Silicone Co., Ltd.) as a C component, and a hydrosilylation catalyst as a D component [platinum carbonyl complex (manufactured by Azumax Co., S
IP 6829.0)] 30 ppm and 0.05 part of acetylene alcohol (DMHO) were used to prepare a liquid polymer composition according to the method described above.

[0062]

Example 4 As component A, isoprene: butadiene =
10:90 (weight ratio) of isoprene-butadiene copolymer liquid rubber (Kuraray Co., Ltd., Kuraprene LIR-39)
0) [Mn: 34,000, content ratio of structural unit (α): 10% by weight, viscosity: 300,000 CPS / 25 ° C] 100
Part and silica-treated carbon black as component B b
10 parts, 5 parts of hydrosilyl hardener (TSF484 manufactured by Toshiba Silicone Co., Ltd.) as component C, 30 ppm of hydrosilylation catalyst [platinum carbonyl complex (SIP 6829.0 manufactured by Azumax Co.)] as component D, and acetylene alcohol (DMHO). ) 0.05 part was used to prepare a liquid polymer composition according to the method described above.

[0063]

Example 5 The hydrosilyl curing agent of Example 4 (TSF484 manufactured by Toshiba Silicone Co., Ltd.) was replaced with a hydrosilyl curing agent (α-methylstyrenated H oil, CR-100 manufactured by Kanegafuchi Chemical Industry Co., Ltd.). A liquid polymer composition was prepared in the same manner as in Example 4.

[0064]

Example 6 Polyisobutylene having allyl groups at both ends as the component A (EPION600 manufactured by Kaneka Corporation)
A) 100 parts of [viscosity: 3.8 million CPS / 25 ° C.],
10 parts of silica-treated carbon black b as a component, and a hydrosilyl curing agent as a C component (manufactured by Kaneka Corporation, α-methylstyrenated H oil, CR-100) 5
And a hydrosilylation catalyst as component D [platinum carbonyl complex (Azumax, SIP 6829.0)]
30 ppm and acetylene alcohol (DMHO) 0.
Using 05 parts and 30 parts of a plasticizer [paraffin oil (Idemitsu Kosan Co., Ltd., Diana Process PS-32)],
A liquid polymer composition was prepared according to the method described above.

[0065]

[Example 7] The blending ratio of the silica-treated carbon black b as the component B was changed to 5 parts. A liquid polymer composition was prepared in the same manner as in Example 5 except for the above.

[0066]

Example 8 The blending ratio of the silica-treated carbon black b which is the B component was changed to 30 parts. A liquid polymer composition was prepared in the same manner as in Example 5 except for the above.

[0067]

Example 9 Silica-treated carbon black a was used as the B component. A liquid polymer composition was prepared in the same manner as in Example 5 except for the above.

[0068]

Example 10 Silica-treated carbon black c was used as the B component. A liquid polymer composition was prepared in the same manner as in Example 5 except for the above.

[0069]

Comparative Example 1 Instead of 10 parts of the silica-treated carbon black b which is the component B, 9.5 parts of silica-untreated carbon black (Mitsubishi Black Co., Diablack # 3030) and wet silica (Nippushiru Nippon Silica Co., Ltd.) VN3)
0.5 part was used. A liquid polymer composition was prepared in the same manner as in Example 1 except for the above.

[0070]

[Comparative Example 2] In place of 10 parts of silica-treated carbon black b which is the component B, 9.5 parts of silica-untreated carbon black (Mitsubishi Black Co., Diablack # 3030) and wet silica (Nippushiru Nipsil Co., Ltd.) VN3)
0.5 part was used. A liquid polymer composition was prepared in the same manner as in Example 5 except for the above.

[0071]

[Comparative Example 3] In place of 10 parts of silica-treated carbon black b which is the B component, 9.5 parts of silica-untreated carbon black (manufactured by Mitsubishi Chemical Co., Ltd., Diablack # 3030) and wet silica (manufactured by Nippon Silica Co., Ltd., Nipsil) VN3)
0.5 part was used. A liquid polymer composition was prepared in the same manner as in Example 6 except for the above.

Each liquid polymer composition thus obtained was used to evaluate each characteristic according to the following criteria. The results are also shown in Tables 1 to 3 below.

[Dispersion State of Carbon Black] The dispersion state of carbon black in the liquid polymer composition was measured at room temperature and 150 ° C. under an optical microscope (manufactured by Nikon Corporation, OPTIPH).
02-POL) [magnification: 400 times].
The evaluation was displayed as follows. Good: dispersibility is good with no aggregation of carbon black of 5 μm or more. Poor: dispersibility is poor because carbon black aggregates into lumps of 5 μm or more.

[Hardness] The liquid polymer composition was cast into a mold which had been heated to 150 ° C. in advance and held for 5 minutes for crosslinking to prepare a sheet having a thickness of 2 mm. Then, the hardness of this sheet was measured according to JIS A of JIS K 6301.

[Electrical Resistance] The electrical resistance of the above-mentioned sheet [median value and variation digit (36 points)] was measured according to JIS K 6911 using an electrode of 1 mm ² .

[Tensile Strength] The tensile strength of the sheet is
It was measured according to IS K 6301.

[0077]

[Table 1]

[0078]

[Table 2]

[0079]

[Table 3]

From the results of Tables 1 to 3 above, since all the products of Examples use the silica-treated carbon black, the carbon black does not aggregate, the dispersibility is good, and the variation in electric resistance is small. I understand. On the other hand, since the comparative example product uses silica-untreated carbon black (normal furnace black), the polymer has a low viscosity at high temperature, the carbon black aggregates and the dispersibility is poor, and the electric resistance varies. It turns out that is large.

[0081]

As described above, the liquid polymer composition of the present invention uses the liquid polymer (component A) together with the carbon black having the silica fixed on the surface (component B). Aggregation can be suppressed. As a result, the liquid polymer composition of the present invention,
Since the dispersibility of carbon black in the liquid polymer (component A) is good, the variation in electric resistance is small, and the good dispersibility can be maintained stably,
Excellent stability of electric resistance.

If a hydrosilyl curing agent (C component) and a hydrosilylation catalyst (D component) are used together with the above A component and B component, the crosslinking rate at the time of molding is increased, which leads to improvement in productivity.

Front page continuation (72) Inventor Shoji Arimura 3600 Amigazu, Kita Sotoyama, Komaki City, Aichi Prefecture Tokai Rubber Industry Co., Ltd. Rubber Industry Co., Ltd. (56) Reference JP-A-11-140235 (JP, A) JP-A-11-49895 (JP, A) JP-A-9-118781 (JP, A) (58) Fields investigated ( Int.Cl. ⁷ , DB name) C08L 1/00-101/16

Claims (6)

(57) [Claims] 1. A liquid polymer composition containing the following components (A) and (B). (A) Liquid polymer. (B) Carbon black having silica fixed on its surface. 2. The liquid polymer composition according to claim 1, wherein the component (A) is an organopolysiloxane having at least two alkenyl groups in the molecule. 3. The liquid polymer composition according to claim 1, wherein the component (A) is derived from at least one of butadiene and isoprene and has a structural unit having an alkenyl group in its side chain in its molecule. 4. Along with the components (A) and (B),
The following (C) component and (D) component are contained.
4. The liquid polymer composition according to any one of 3 to 3. (C) Hydrosilyl curing agent. (D) Hydrosilylation catalyst. 5. The component (C) is represented by the following general formula (1):
The liquid polymer composition according to claim 4, which is represented by at least one general formula selected from the group consisting of (3). [Chemical 1] [Chemical 2] [Chemical 3] 6. The content of silica in the component (B) is
The liquid polymer composition according to any one of claims 1 to 5, which is set in a range of 1 to 10% by weight based on the entire component (B).