JP2000282006A - Hot melt adhesive composition - Google Patents

Abstract

(57) [Summary] [Problem] It has excellent adhesiveness, low melt viscosity, good coating workability even when used at relatively low temperature, good thermal stability, and handling without stickiness during production. A hot melt adhesive with good workability is obtained. An SBS or S-EB-S block copolymer, a SIS or S-EP-S block block copolymer and an S-I or S-EP linear diblock type The block copolymer comprising the block copolymer is melt-kneaded. Alternatively, an S-S-S or S-E-P-S block copolymer, an S-B-S or S-EB-S block block copolymer and an S-B or S-EB linear diblock type block copolymer may be used. A block copolymer composed of a polymer is melt-kneaded. Here, S is a polystyrene block, B is a butadiene block, I is an isoprene block, EB is a hydrogenated butadiene block, and EP is a hydrogenated isoprene block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a hot melt adhesive composition having excellent adhesiveness particularly to a polyolefin-based material.

[0002]

2. Description of the Related Art As a hot-melt adhesive composition of this kind, a thermoplastic block copolymer (such as SBS) comprising a styrene polymer block and a butadiene polymer block, or a styrene polymer block and isoprene Thermoplastic block copolymer (S-
Adhesives using IS as the base polymer are known (for example, JP-A-60-158284, JP-A-2-145671, and JP-A-4-35).
No. 1689).

[0003] Such hot melt adhesives are, in particular,
Uses a polyolefin film or nonwoven fabric that has good adhesion to polyolefins such as polyethylene and polypropylene, has good cohesion, is transparent, has good flexibility and durability, and has many fine air holes. It is used for the production of disposable diapers, sanitary napkins, bed pads, etc., which are formed by bonding in the form of dots, dots or planes.

[0004] In recent years, for such applications, the functions have been advanced and the materials to be adhered and the form of products have become complicated. Therefore, the hot melt adhesive used for this purpose has a low melt viscosity and good thermal stability. A high-precision coating is required, and a coating having high adhesiveness in a wide temperature range from a low temperature to a high temperature is required.

A thermoplastic block copolymer comprising the above styrene polymer block and butadiene polymer block,
Alternatively, in the case of a conventional adhesive using a thermoplastic block copolymer composed of a styrene polymer block and an isoprene polymer block as a base polymer, in each case, there is a disadvantage that the melt viscosity is particularly high.

On the other hand, in order to lower the melt viscosity, a diblock copolymer (S-B) is added to a thermoplastic block copolymer (SBS) comprising a styrene polymer block and a butadiene polymer block. Is known (for example, see Japanese Patent Publication No. 5-1023).

However, in the method of blending these diblock copolymers, although the melt viscosity can be lowered,
The adhesion at low temperatures is not improved. Further, even if such diblock copolymers are simply mixed, these diblock copolymers are all soft and sticky (sticky), cannot be pelletized, and must be handled. There is a problem that workability deteriorates.

[0008]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems in the conventional hot melt adhesive,
Its purpose is to have low melt viscosity, good thermal stability, good coating workability, high adhesiveness over a wide temperature range from low to high temperatures, and the use of thermoplastic blocks during production. An object of the present invention is to provide a hot-melt adhesive which is not sticky and has good workability.

[0009]

In order to achieve the above object, according to the present invention, there is provided a hot melt adhesive composition containing a base polymer (A) and a base polymer (B),

The base polymer (A) is a thermoplastic block copolymer composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a butadiene polymer block. It consists of at least one kind of thermoplastic block copolymer (a-1) selected from the group of linear multi-block type and radial block type thermoplastic block copolymers,

The base polymer (B) is a thermoplastic block copolymer composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and an isoprene polymer block, and is a linear triblock type. At least one type of thermoplastic block copolymer (b-1) selected from the group consisting of linear multi-block type and radial block type thermoplastic block copolymers and a linear diblock type thermoplastic block copolymer (b- 2) A hot melt adhesive composition characterized by comprising:

According to a second aspect of the present invention, there is provided a hot melt adhesive composition comprising a base polymer (C) and a base polymer (D),

The base polymer (C) is a thermoplastic block copolymer composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and an isoprene polymer block, and is a linear triblock type. It consists of at least one kind of thermoplastic block copolymer (c-1) selected from the group of linear multi-block type and radial block type thermoplastic block copolymers,

The base polymer (D) is a thermoplastic block copolymer composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a butadiene polymer block. At least one type of thermoplastic block copolymer (d-1) selected from the group of linear multi-block type and radial block type thermoplastic block copolymers and a linear diblock type thermoplastic block copolymer (d- 2) A hot melt adhesive composition characterized by comprising:

According to the third aspect of the present invention, the weight ratio of the base polymer (A) to the base polymer (B) is 95: 5 to 5: 5.
5:95, and the weight ratio of the thermoplastic block copolymer (b-1) to the thermoplastic block copolymer (b-2) in the base polymer (B) is 90:10 to 10:90. A hot melt adhesive composition according to claim 1 is provided.

According to the invention of claim 4, the weight ratio of the base polymer (C) to the base polymer (D) is 95: 5 to 5: 5.
5:95, and the weight ratio of the thermoplastic block copolymer (d-1) to the thermoplastic block copolymer (d-2) in the base polymer (D) is 90:10 to 10:90. A hot melt adhesive composition according to claim 2 is provided.

In the invention of claim 5, the content of the butadiene polymer block in the base polymer (A) is 10 to 10.
The hot melt adhesive composition according to claim 1 or 3, wherein the hot melt adhesive composition is 95% by weight and the content of the isoprene polymer block in the base polymer (B) is 10 to 95% by weight. Is done.

In the invention according to claim 6, the content of the isoprene polymer block in the base polymer (C) is 10 to 10.
5. The hot melt adhesive composition according to claim 2, wherein the content is 95% by weight, and the content of the butadiene polymer block in the base polymer (D) is 10 to 95% by weight. 6. Is done.

According to the invention of claim 7, there is provided a hot melt adhesive composition containing a base polymer (E) and a base polymer (F),

The base polymer (E) comprises an aromatic vinyl polymer block having a glass transition temperature of room temperature or higher;
A thermoplastic block copolymer composed of a partially hydrogenated isoprene polymer block or a completely hydrogenated isoprene polymer block, and is a linear triblock type, a linear multiblock type, or a radial block type thermoplastic block copolymer. Consisting of at least one thermoplastic block copolymer (e-1) selected from the group of

The base polymer (F) comprises: an aromatic vinyl polymer block having a glass transition point of room temperature or higher;
A thermoplastic block copolymer composed of a partially hydrogenated butadiene polymer block or a completely hydrogenated butadiene polymer block, wherein the thermoplastic block copolymer is a linear triblock type, a linear multiblock type, or a radial block type. A hot-melt adhesive composition comprising at least one thermoplastic block copolymer (f-1) selected from the group consisting of: and a linear diblock-type thermoplastic block copolymer (f-2) Things are provided.

In the invention of claim 8, the weight ratio of the base polymer (E) to the base polymer (F) is 95: 5 to 5: 5.
5:95, and the weight ratio of the thermoplastic block copolymer (f-1) to the thermoplastic block copolymer (f-2) in the base polymer (F) is 90:10 to 10:90. A hot melt adhesive composition according to claim 7 is provided.

In the ninth aspect of the present invention, the content of the partially hydrogenated isoprene polymer block or the fully hydrogenated isoprene polymer block in the base polymer (E) is 10 to 9%.
9. The composition according to claim 7, wherein the content of the partially hydrogenated butadiene polymer block or the completely hydrogenated butadiene polymer block in the base polymer (F) is 10 to 95% by weight. The hot melt adhesive composition according to the above is provided.

According to a tenth aspect of the present invention, there is provided a hot melt adhesive composition comprising a base polymer (G) and a base polymer (H),

The base polymer (G) comprises: an aromatic vinyl polymer block having a glass transition point of room temperature or higher;
A thermoplastic block copolymer composed of a partially hydrogenated butadiene polymer block or a completely hydrogenated butadiene polymer block, wherein the thermoplastic block copolymer is a linear triblock type, a linear multiblock type, or a radial block type. Consisting of at least one thermoplastic block copolymer (g-1) selected from the group of

The base polymer (H) comprises: an aromatic vinyl polymer block having a glass transition point of room temperature or higher;
A thermoplastic block copolymer composed of a partially hydrogenated isoprene polymer block or a completely hydrogenated isoprene polymer block, and is a linear triblock type, a linear multiblock type, or a radial block type thermoplastic block copolymer. A hot melt adhesive composition comprising at least one type of thermoplastic block copolymer (h-1) selected from the group consisting of: and a linear diblock type thermoplastic block copolymer (h-2). Things are provided.

According to the eleventh aspect, the weight ratio of the base polymer (G) to the base polymer (H) is 95: 5 to 5: 5.
5:95, and the weight ratio of the thermoplastic block copolymer (h-1) to the thermoplastic block copolymer (h-2) in the base polymer (H) is 90:10 to 10:90. A hot melt adhesive composition according to claim 10 is provided.

In the twelfth aspect, the content of the partially hydrogenated butadiene polymer block or the completely hydrogenated butadiene polymer block in the base polymer (G) is 10 to 9%.
The content of the partially hydrogenated isoprene polymer block or the fully hydrogenated isoprene polymer block in the base polymer (H) is 5% by weight, and the content is 10 to 95% by weight. The hot melt adhesive composition according to the above is provided.

[0029] In the invention of claim 13, the hot melt adhesive composition according to any one of claims 7 to 12, further comprising an α-olefin resin as a base polymer. Is done.

In the fourteenth aspect of the present invention, α is relative to 100 parts by weight of the total of the base polymer (E) and the base polymer (F) or 100 parts by weight of the total of the base polymer (G) and the base polymer (H). The hot melt adhesive composition according to claim 13, wherein the olefin resin is contained in a range of 40 parts by weight or less.

According to a fifteenth aspect of the present invention, there is provided the hot melt adhesive composition according to any one of the first to fourteenth aspects, wherein the composition comprises a tackifying resin and a plasticizing oil. .

[0032] According to a sixteenth aspect of the present invention, the tackifying resin and the plasticizing oil are contained in an amount of 5 to 500 parts by weight and 5 to 350 parts by weight based on 100 parts by weight of the base polymer. 15. A hot melt adhesive composition according to item 15, is provided.

First, with respect to the first, third and fifth aspects of the present invention,
This will be described in detail below. In the present invention, the base polymer (A) is a thermoplastic block copolymer composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a butadiene polymer block, and is a linear triblock type. At least one type of thermoplastic block copolymer selected from the group consisting of linear multi-block type and radial block type thermoplastic block copolymers (a-
1).

The aromatic vinyl polymer block having a glass transition point at room temperature or higher includes polymer blocks such as styrene, vinyltoluene, vinylxylene, and ethylvinylbenzene, and is usually a styrene polymer block. It is. The weight average molecular weight of the thermoplastic block copolymer (a-1) is generally from 3 × 10 ⁴ to
50 × 10 ⁴ , preferably 5 × 10 ⁴ to 30 × 1
0 is ^4, more preferably 7 × 10 ⁴ ~25 × 10
⁴

The above thermoplastic block copolymer (a-1)
Of these, the linear triblock type is usually SBS
(S is a styrene polymer block and B is a butadiene polymer block), for example, Asaprene T-420 manufactured by Asahi Kasei Corporation. The linear multi-block type is usually represented by (S-B) n (n is an integer of 2 or more).
0A and the like. The radial block type is
It is represented by the general formula (SB) n Y (n is an integer of 2 or more, Y is a coupling agent), and examples thereof include Clayton D-1184 manufactured by Shell Chemical Company.

The base polymer (B) is a thermoplastic block copolymer composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and an isoprene polymer block. , At least one type of thermoplastic block copolymer (b-1) selected from the group consisting of linear multi-block type and radial block type thermoplastic block copolymers and a linear diblock type thermoplastic block copolymer (b -2).

Here, examples of the aromatic vinyl polymer block having a glass transition point at room temperature or higher include polymer blocks such as styrene, vinyl toluene, vinyl xylene, and ethyl vinyl benzene. It is. The weight average molecular weight of the thermoplastic block copolymer (b-1) is generally from 3 × 10 ⁴ to
50 × 10 ⁴ , preferably 5 × 10 ⁴ to 30 × 1
0 is ^4, more preferably 7 × 10 ⁴ ~25 × 10
⁴ Further, a thermoplastic block copolymer (b-2)
Generally has a weight average molecular weight of 1 × 10 ⁴ to 30 × 10
⁴ , preferably 2 × 10 ^{4 to} 20 × 10 ⁴ , more preferably 4 × 10 ⁴ to 15 × 10 ⁴ .

The above thermoplastic block copolymer (b-1)
Among them, the linear triblock type is usually SIS
(S is a styrene polymer block, I is an isoprene polymer block), for example, Clayton D-1107 manufactured by Shell Chemical Company. The linear multi-block type is usually represented by (S-I) n (n is an integer of 2 or more). In addition, radial block type is usually
(SI) n Y (n is an integer of 2 or more, Y is a coupling agent).

The linear diblock type thermoplastic block copolymer (b-2) is usually represented by SI (S is a styrene polymer block and I is an isoprene polymer block). Such a linear diblock type thermoplastic block copolymer (b-2) is commercially available as a simple substance because it is soft and sticky (sticky) as described above and cannot be pelletized. Is difficult.

The base polymer (B) may be prepared by using a specific coupling agent or synthesizing a linear diblock type thermoplastic block when synthesizing the thermoplastic block copolymer (b-1). By mixing the polymer (b-2), a product in which the linear diblock-type thermoplastic block copolymer (b-2) coexists can be obtained, but it is convenient to use a commercially available product. . Commercially available products of the base polymer (B) include, for example, Kraton D-1112 and Kraton D-KX406 manufactured by Shell Chemical Company.

The above base polymer (A) and base polymer (B) generally have a weight ratio (former: latter) of 95:
Although it is contained so as to be 5: 5: 95, in order to compensate for the drawbacks of the base polymer (A) and the base polymer (B) and to ensure good adhesion and good thermal stability,
Preferably 80:20 to 25:75, more preferably 7
5:25 to 35:65, more preferably 65:35 to
45:55.

When the component of the base polymer (A) is larger than the above range and the component of the base polymer (B) is smaller than the above range, the adhesive strength is reduced, the viscosity increases with time during heating, and gelation occurs. When bleed-out occurs and the content of the base polymer (A) is less than the above range, and the content of the base polymer (B) is more than the above range, the viscosity at the time of heating decreases and the cohesion decreases. A decrease in force occurs.

The thermoplastic block copolymer (b-1) and the thermoplastic block copolymer (b-2) in the base polymer (B) generally have a weight ratio (former: latter) of 9%.
Although it is contained so as to be 0:10 to 10:90, it is preferably 80:20 to 20:80, more preferably 75:20, in order to secure good granulation (pelletization) at normal temperature.
25 to 25:75, more preferably 50:50 to 2
5:75.

The content of the butadiene polymer block in the base polymer (A) is generally from 10 to 95% by weight, but is preferably from 30 to 90% by weight in order to secure good adhesion. More preferably, it is 45 to 80% by weight, and still more preferably 55 to 75% by weight. Also,
The content of the isoprene polymer block in the base polymer (B) is generally 10 to 95% by weight, but is preferably 30 to 95% by weight, more preferably 45 to 95% by weight in order to secure good adhesiveness. It is 90% by weight, more preferably 55 to 86% by weight.

Next, the second, fourth and sixth aspects of the present invention will be described in detail. In the present invention, the base polymer (C) is a thermoplastic block copolymer composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and an isoprene polymer, and is a linear triblock type, linear It is composed of at least one type of thermoplastic block copolymer (c-1) selected from the group consisting of multi-block type and radial block type thermoplastic block copolymers.

Here, examples of the aromatic vinyl polymer block having a glass transition point of room temperature or higher include polymer blocks such as styrene, vinyl toluene, vinyl xylene, and ethyl vinyl benzene. It is. The weight average molecular weight of the thermoplastic block copolymer (c-1) is generally from 3 × 10 ⁴ to
50 × 10 ⁴ , preferably 5 × 10 ⁴ to 30 × 1
0 is ^4, more preferably 7 × 10 ⁴ ~25 × 10
⁴

The above thermoplastic block copolymer (c-1)
Among them, the linear triblock type is usually SIS
(S is a styrene polymer block, I is an isoprene polymer block), for example, Clayton D-1107 manufactured by Shell Chemical Company. The linear multi-block type is usually represented by (S-I) n (n is an integer of 2 or more). The radial block type is represented by the general formula (SI) n Y (n is an integer of 2 or more, Y is a coupling agent), and examples thereof include Quintac 3450 manufactured by Zeon Corporation.

The base polymer (D) is a thermoplastic block copolymer composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a butadiene polymer block. , At least one type of thermoplastic block copolymer (d-1) selected from the group consisting of linear multi-block type and radial block type thermoplastic block copolymers, and a linear diblock type thermoplastic block copolymer (d -2).

The aromatic vinyl polymer block having a glass transition point of room temperature or higher includes polymer blocks such as styrene, vinyl toluene, vinyl xylene, and ethyl vinyl benzene. It is. The weight average molecular weight of the thermoplastic block copolymer (d-1) is generally from 3 × 10 ⁴ to
50 × 10 ⁴ , preferably 5 × 10 ⁴ to 30 × 1
0 is ^4, more preferably 7 × 10 ⁴ ~25 × 10
⁴ Also, a thermoplastic block copolymer (d-2)
Generally has a weight average molecular weight of 1 × 10 ⁴ to 30 × 10
⁴ , preferably 2 × 10 ^{4 to} 20 × 10 ⁴ , more preferably 4 × 10 ⁴ to 15 × 10 ⁴ .

The above thermoplastic block copolymer (d-1)
Of these, the linear triblock type is usually SBS
(S is a styrene polymer block and B is a butadiene polymer block), for example, Asaprene T-420 manufactured by Asahi Kasei Corporation. The linear multi-block type is usually represented by (S-B) n (n is an integer of 2 or more).
0A and the like. The radial block type is
It is represented by the general formula (SB) n Y (n is an integer of 2 or more, Y is a coupling agent), and examples thereof include Clayton D-1184 manufactured by Shell Chemical Company.

The linear diblock type thermoplastic block copolymer (d-2) is usually represented by SB (S is a styrene polymer block and B is a butadiene polymer block). Such a linear diblock type thermoplastic block copolymer (d-2) is flexible and sticky (sticky) as described above, and cannot be pelletized. Is difficult.

The base polymer (D) may be prepared by using a specific coupling agent or a linear diblock type thermoplastic block when synthesizing the thermoplastic block copolymer (d-1). By mixing the polymer (d-2), a linear diblock-type thermoplastic block copolymer (d-2) can be obtained, but it is convenient to use a commercially available product. . Commercially available base polymers (D) include, for example, Asaprene JT-38L manufactured by Asahi Kasei Corporation and JSRTR26 manufactured by Nippon Synthetic Rubber Co., Ltd.
00 and the like.

The above base polymer (C) and base polymer (D) generally have a weight ratio (former: latter) of 95:
It is contained so as to be 5: 5: 95, but in order to compensate for the disadvantages of the base polymer (C) and the base polymer (D), and to secure good adhesiveness and good thermal stability,
Preferably 75:25 to 20:80, more preferably 6
5:35 to 25:75, more preferably 55:45 to
35:65 is contained.

When the component of the base polymer (C) is larger than the above range and the component of the base polymer (D) is smaller than the above range, a decrease in viscosity upon heating and a decrease in cohesive force occur. Conversely, the component of the base polymer (C) becomes smaller than the above range, and the base polymer (D)
When the amount of the component is more than the above range, a decrease in adhesive strength,
During heating, viscosity rise with time, gelation, bleed-out, etc. occur.

The weight ratio (the former: the latter) of the thermoplastic block copolymer (d-1) and the thermoplastic block copolymer (d-2) in the base polymer (D) is generally 9%.
Although it is contained so as to be 0:10 to 10:90, it is preferably 80:20 to 20:80, more preferably 75:20, in order to secure good granulation (pelletization) at normal temperature.
25 to 25:75, more preferably 50:50 to 2
5:75.

The content of the isoprene polymer block in the base polymer (C) is generally from 10 to 95% by weight, but preferably 30 to 95% by weight in order to secure good adhesion. More preferably, it is 45 to 90% by weight, and still more preferably 55 to 86% by weight. Also,
The content of the butadiene polymer block in the base polymer (D) is generally from 10 to 95% by weight, but is preferably from 30 to 90% by weight, more preferably from 45 to 90% by weight in order to secure good adhesion. It is 80% by weight, more preferably 55 to 75% by weight.

Next, the invention of claims 7, 8 and 9 will be described.
This will be described in detail below. In the present invention, the base polymer (E) is a thermoplastic block composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a partially hydrogenated isoprene polymer block or a completely hydrogenated isoprene polymer block. At least one thermoplastic block copolymer selected from the group consisting of linear triblock type, linear multiblock type and radial block type thermoplastic block copolymers (e-
1).

Here, examples of the aromatic vinyl polymer block having a glass transition point of room temperature or higher include polymer blocks such as styrene, vinyl toluene, vinyl xylene, and ethyl vinyl benzene. It is. The weight average molecular weight of the thermoplastic block copolymer (e-1) is generally from 3 × 10 ⁴ to
50 × 10 ⁴ , preferably 4 × 10 ⁴ to 30 × 1
0 is ^4, more preferably 5 × 10 ⁴ ~25 × 10 ⁴
It is.

The above thermoplastic block copolymer (e-1)
Among them, the linear triblock type is usually S-EP-S
(S is a styrene polymer block, EP is a partially hydrogenated isoprene polymer block or a fully hydrogenated isoprene polymer block), and is, for example, Septon 2 manufactured by Kuraray Co., Ltd.
007 and the like. The linear multi-block type is usually represented by (S-EP) n (n is an integer of 2 or more). The radial block type has the general formula (SE)
P) n Y (n is an integer of 2 or more, Y is a coupling agent).

The base polymer (F) is a thermoplastic block composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a partially hydrogenated butadiene polymer block or a completely hydrogenated butadiene polymer block. A linear triblock type, a linear multiblock type, and a radial block type thermoplastic block copolymer (f-1) selected from the group of thermoplastic block copolymers; And a block type thermoplastic block copolymer (f-2).

Here, examples of the aromatic vinyl polymer block having a glass transition point of room temperature or higher include polymer blocks such as styrene, vinyl toluene, vinyl xylene, and ethyl vinyl benzene. It is. The weight average molecular weight of the thermoplastic block copolymer (f-1) is generally from 3 × 10 ⁴ to
50 × 10 ⁴ , preferably 4 × 10 ⁴ to 30 × 1
0 is ^4, more preferably 5 × 10 ⁴ ~25 × 10 ⁴
It is. The weight average molecular weight of the thermoplastic block copolymer (f-2) is generally from 1 × 10 ⁴ to 30 × 10 ^4.
And preferably 2 × 10 ^{4 to} 20 × 10 ⁴ ,
More preferably, it is 3 × 10 ⁴ to 15 × 10 ⁴ .

The above thermoplastic block copolymer (f-1)
Of these, the linear triblock type is usually S-EB-S
(S is a styrene polymer block, EB is a partially hydrogenated butadiene polymer block or a fully hydrogenated butadiene polymer block), and examples thereof include Clayton G1652 manufactured by Shell Chemical Company. The linear multi-block type is usually represented by (S-EB) n (n is an integer of 2 or more), and the radial block type is represented by the general formula (SE)
B) n Y (n is an integer of 2 or more, Y is a coupling agent).

The linear diblock type thermoplastic block copolymer (f-2) is usually S-EB (S is a styrene polymer block, EB is a partially hydrogenated butadiene polymer block or fully hydrogenated butadiene). Polymer block)
It is represented by Such a linear diblock-type thermoplastic block copolymer (f-2) is commercially available as a simple substance because it is soft and sticky (sticky) as described above and cannot be pelletized. Is difficult.

Such a base polymer (F) may be prepared by using a specific coupling agent or a linear diblock type thermoplastic block when synthesizing the thermoplastic block copolymer (f-1). By mixing the polymer (f-2), a product in which the linear diblock-type thermoplastic block copolymer (f-2) coexists can be obtained, but it is convenient to use a commercially available product. . Commercially available products of the base polymer (F) include, for example, Kraton G1726 and G1657 manufactured by Shell Chemical Company.

The above base polymer (E) and base polymer (F) generally have a weight ratio (former: latter) of 95:
It is contained so as to be 5: 5: 95, but in order to compensate for the defects of the base polymer (E) and the base polymer (F), and to secure good adhesiveness and good thermal stability,
Preferably 75:25 to 20:80, more preferably 6
5:35 to 25:75, more preferably 55:45 to
35:65 is contained.

When the content of the base polymer (E) is larger than the above range and the content of the base polymer (F) is smaller than the above range, the spray coatability is deteriorated and the adhesive strength is lowered. On the contrary, when the component of the base polymer (E) is smaller than the above range and the component of the base polymer (F) is larger than the above range, the cohesive strength is reduced and the handling property is deteriorated. Problems arise.

The thermoplastic block copolymer (f-1) and the thermoplastic block copolymer (f-2) in the base polymer (F) generally have a weight ratio (former: latter) of 9%.
Although it is contained so as to be 0:10 to 10:90, it is preferably 80:20 to 20:80, more preferably 75:20, in order to secure good granulation (pelletization) at normal temperature.
25 to 25:75, more preferably 50:50 to 2
5:75.

Further, the content of the partially hydrogenated isoprene polymer block or the completely hydrogenated isoprene polymer block in the base polymer (E) is generally 10 to 95% by weight, but good adhesion is ensured. Preferably 3
The content is 0 to 90% by weight, more preferably 45 to 90% by weight, and still more preferably 55 to 85% by weight. The content of the partially hydrogenated butadiene polymer block or the completely hydrogenated butadiene polymer block in the base polymer (F) is generally from 10 to 95% by weight, but in order to secure good adhesiveness, It is preferably from 30 to 90% by weight, more preferably from 45 to 80% by weight, even more preferably from 55 to 85% by weight. Next, the invention of claims 10, 11 and 12 will be described in detail below. In the present invention, the base polymer (G) is a thermoplastic block composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher, and a partially hydrogenated butadiene polymer block or a completely hydrogenated butadiene polymer block. A copolymer,
It is composed of at least one thermoplastic block copolymer (g-1) selected from the group consisting of linear triblock type, linear multiblock type and radial block type thermoplastic block copolymers.

Here, examples of the aromatic vinyl polymer block having a glass transition point of room temperature or higher include polymer blocks such as styrene, vinyl toluene, vinyl xylene, and ethyl vinyl benzene. It is. The thermoplastic block copolymer (g-1) generally has a weight average molecular weight of 3 × 10 ⁴ to
50 × 10 ⁴ , preferably 4 × 10 ⁴ to 30 × 1
0 is ^4, more preferably 5 × 10 ⁴ ~25 × 10 ⁴
It is.

The above thermoplastic block copolymer (g-1)
Of these, the linear triblock type is usually S-EB-S
(S is a styrene polymer block, EB is a partially hydrogenated butadiene polymer block or a fully hydrogenated butadiene polymer block), and examples thereof include Clayton G-1652 manufactured by Shell Chemical Company. The linear multi-block type is usually represented by (S-EB) n (n is an integer of 2 or more). The radial block type is represented by the general formula (S-EB) n Y (n is an integer of 2 or more, and Y is a coupling agent).

The base polymer (H) is a thermoplastic block composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a partially hydrogenated isoprene polymer block or a completely hydrogenated isoprene polymer block. A linear triblock type, a linear multiblock type and a radial block type thermoplastic block copolymer (h-1). And a block type thermoplastic block copolymer (h-2).

Here, examples of the aromatic vinyl polymer block having a glass transition point at room temperature or higher include polymer blocks such as styrene, vinyl toluene, vinyl xylene, and ethyl vinyl benzene. It is. The weight average molecular weight of the thermoplastic block copolymer (h-1) is generally from 3 × 10 ⁴ to
50 × 10 ⁴ , preferably 4 × 10 ⁴ to 30 × 1
0 is ^4, more preferably 5 × 10 ⁴ ~25 × 10 ⁴
It is. The weight average molecular weight of the thermoplastic block copolymer (h-2) is generally from 1 × 10 ⁴ to 30 × 10 ^4.
And preferably 2 × 10 ^{4 to} 20 × 10 ⁴ ,
More preferably, it is 3 × 10 ⁴ to 15 × 10 ⁴ .

The above thermoplastic block copolymer (h-1)
Among them, the linear triblock type is usually S-EP-S
(S is a styrene polymer block, EP is a partially hydrogenated isoprene polymer block or a fully hydrogenated isoprene polymer block), for example, Septon manufactured by Kuraray Co., Ltd.
2007 and the like. The linear multi-block type is usually represented by (S-EP) n (n is an integer of 2 or more), and the radial block type is represented by the general formula (S-EP) n
Y (n is an integer of 2 or more, Y is a coupling agent).

The linear diblock type thermoplastic block copolymer (h-2) is usually S-EB (S is a styrene polymer block, EB is a partially hydrogenated butadiene polymer block or fully hydrogenated butadiene). Polymer block)
It is represented by Such a linear diblock-type thermoplastic block copolymer (f-2) is commercially available as a simple substance because it is soft and sticky (sticky) as described above and cannot be pelletized. Is difficult.

Such a base polymer (H) may be prepared by using a specific coupling agent or synthesizing a linear diblock type thermoplastic block when synthesizing the thermoplastic block copolymer (h-1). By mixing the polymer (h-2), a linear diblock-type thermoplastic block copolymer (h-2) can be obtained, but it is convenient to use a commercially available product. . Commercially available products of the base polymer (H) include, for example, Septon 2277 manufactured by Kuraray Co., Ltd.

The above base polymer (G) and base polymer (H) generally have a weight ratio (former: latter) of 95:
Although it is contained so as to be 5: 5: 95, in order to compensate for the disadvantages of the base polymer (G) and the base polymer (H), and to secure good adhesiveness and good thermal stability,
Preferably 75:25 to 20:80, more preferably 6
5:35 to 25:75, more preferably 55:45 to
35:65 is contained.

If the component of the base polymer (G) is larger than the above range and the component of the base polymer (H) is smaller than the above range, the spray coatability is deteriorated and the adhesive strength is lowered. On the contrary, when the component of the base polymer (G) is less than the above range and the component of the base polymer (H) is more than the above range, the cohesive strength is reduced and the handling property is deteriorated. Problems arise.

The thermoplastic block copolymer (h-1) and the thermoplastic block copolymer (h-2) in the base polymer (H) generally have a weight ratio (former: latter) of 9%.
Although it is contained so as to be 0:10 to 10:90, it is preferably 80:20 to 20:80, more preferably 75:20, in order to secure good granulation (pelletization) at normal temperature.
25 to 25:75, more preferably 50:50 to 2
5:75.

Further, the content of the partially hydrogenated butadiene polymer block or the completely hydrogenated butadiene polymer block in the base polymer (G) is generally 10 to 95% by weight, but good adhesion is ensured. Preferably 3
The content is 0 to 90% by weight, more preferably 45 to 90% by weight, and still more preferably 55 to 85% by weight. The content of the partially hydrogenated isoprene polymer block or the completely hydrogenated isoprene polymer block in the base polymer (H) is generally 10 to 95% by weight, but in order to secure good adhesion, It is preferably from 30 to 90% by weight, more preferably from 45 to 90% by weight, even more preferably from 55 to 85% by weight.

Next, the invention according to claims 13 and 14 will be described in detail. In the present invention, the above-mentioned claim 7
In the inventions of the twelfth to twelfth aspects, the base polymer (E) and the base polymer (F) or the base polymer (G) and the base polymer (H) further contain an α-olefin resin as a base polymer. Here, as the α-olefin resin, for example, an amorphous α-olefin resin as described in JP-A-8-109360, for example, atactic polypropylene, propylene-ethylene copolymer, propylene- Butene-1 copolymer, propylene-ethylene-butene-1 copolymer, propylene-hexene-1 copolymer, propylene-hexene-1 copolymer, propylene-octene-1 copolymer, propylene-
2-methylpentene-1 having a number average molecular weight of 1,
Those of 000 to 20,000 are preferably used.

Here, the degree of crystallinity of the amorphous α-olefin resin is preferably 30% or less, more preferably 20% or less. Specific examples of such an amorphous α-olefin resin include, for example, Ube Tack 2780 (trade name, manufactured by Ube Lexen)
Butene-1 random copolymer, weight ratio 65/35), Ubetac 2585 (propylene-ethylene random copolymer, weight ratio 85/15), Ubetac 2385 (propylene-ethylene random copolymer, weight ratio 94/6)
Is mentioned.

The α-olefin resin is generally used in a total of 100 parts by weight of the base polymer (E) and the base polymer (F) or a total of 100 parts by weight of the base polymer (G) and the base polymer (H). On the other hand, it is contained in a range of 40 parts by weight or less, preferably in a range of 5 to 35 parts by weight, more preferably in a range of 10 to 30 parts by weight. If the content of the α-olefin resin is too small, the effect of reducing the tack force after the adhesive is solidified cannot be obtained, and if the content of the olefin resin is too large, the compatibility is lowered and the coating is not performed. Workability deteriorates, and the initial adhesive strength and low-temperature adhesiveness decrease.

Further, the invention according to claims 15 and 16 will be described in detail below. In the present invention, the hot melt adhesive composition obtained by the above-described claims 1 to 14 contains a tackifier and a plasticizing oil. By including these, the adhesive performance can be further improved. As the tackifier, rosin resin,
Among the petroleum resins, terpene-based resins, phenol-based resins, xylene resins, and the like, those having good compatibility with the base polymer are used alone or in combination.

The plasticizing oil may be any of paraffinic, naphthenic and aroma-based oils, and may be used alone or as a mixture.

When used in combination with the hot melt adhesive composition according to the first to sixth aspects of the present invention, it is particularly preferable that the content of the aroma-based component is 7% by weight or less and the naphthene-based component is 25% by weight or more. More preferably, the aroma-based component is 0 to 5% by weight, the naphthene-based component is 25 to 70% by weight, and still more preferably the aroma-based component is 0 to 3.5% by weight, and the naphthene-based component 3 is
0 to 55% by weight. When used in combination with the hot melt adhesive composition of the invention of claims 7 to 12, the aroma-based component is 3% by weight or less and the naphthene-based component is 50% or less.
% Or less, more preferably 0 to 1% by weight of an aroma-based component, 20 to 40% by weight of a naphthene-based component,
More preferably, the content is from 0 to 0.5% by weight of the aroma-based component and from 25 to 35% by weight of the naphthene-based component.

[0086] When the amount of the aroma-based component increases, the odor becomes strong, and the adhesiveness decreases due to the decrease in cohesive force. On the other hand, in the invention of claims 7 to 12, when the amount of the naphthene-based component increases, the compatibility with the base polymer decreases, and bleed out occurs.

The tackifier is usually 5 to 500 parts by weight, preferably 10 to 350 parts by weight, more preferably 50 to 3 parts by weight, based on 100 parts by weight of the base polymer.
00 parts by weight and 5 to 350 parts by weight of plasticizing oil, preferably 10 to 220 parts by weight, more preferably 30 to 20 parts by weight.
0 parts by weight are contained.

When the amount of the tackifier is less than the above range, the hardness of the adhesive composition becomes insufficient, and when the amount exceeds the above range, the adhesive composition becomes brittle. Further, when the amount of the plasticizing oil is less than the above range, the melt viscosity of the adhesive composition becomes high, and high-precision coating cannot be performed. If it decreases and conversely exceeds the above range,
The cohesive strength of the adhesive composition decreases.

The hot melt adhesive composition may contain other known additives such as a softener, an antioxidant, an ultraviolet absorber, a colorant, and an inorganic filler.

The hot melt adhesive of the present invention is prepared by mixing the base polymer (A), the base polymer (B) and, if necessary, a tackifier, a plasticizing oil and other additives in appropriate amounts, and rolling the mixture. It is generally manufactured by melt-kneading at 100 to 200 ° C. with a Banbury mixer, kneader, kneading extruder or the like. Further, the above-mentioned base polymer (C), base polymer (D) and, if necessary, a tackifier, a plasticizing oil and other additives are mixed in appropriate amounts, and this is mixed with a roll, Banbury mixer, kneader, kneading extruder, etc. In general, it is produced by melt-kneading at 100 to 200 ° C. The base polymer (E), base polymer (F) and, if necessary, an α-olefin resin, a tackifier, a plasticizing oil, and other additives are mixed in appropriate amounts, and the mixture is rolled, banbury mixer, kneader With a kneading extruder, generally 100 to 20
It is manufactured by melt-kneading at 0 ° C. Further, the base polymer (G), base polymer (H) and, if necessary, an α-olefin resin, a tackifier, a plasticizing oil, and other additives are mixed in appropriate amounts, and this is mixed with a roll, a Banbury mixer, and a kneader. It is generally manufactured by melt-kneading at 100 to 200 ° C. using a kneading extruder or the like.

(Function) According to the first, third and fifth aspects of the present invention, a thermoplastic block copolymer (a-a) comprising an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a butadiene polymer block. 1) and a thermoplastic block copolymer (b-1) composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and an isoprene polymer block, and further having a glass transition point of room temperature or higher. By containing a linear diblock type thermoplastic block copolymer (b-2) composed of an aromatic vinyl polymer block and an isoprene polymer block,
The melt viscosity is further reduced and the low temperature adhesion is further improved.

Then, the thermoplastic block copolymer (b-2) was previously converted to the thermoplastic block copolymer (b-
By incorporating the compound in 1), good granulation (pelletization) can be performed at room temperature, and handling operability during production is improved.

According to the second, fourth and sixth aspects of the present invention,
Thermoplastic block copolymer (c-1) comprising an aromatic vinyl polymer block having a glass transition point of room temperature or higher and an isoprene polymer block, an aromatic vinyl polymer block having a glass transition point of room temperature or higher, and butadiene Thermoplastic block copolymer comprising a polymer block (d-
And a linear diblock-type thermoplastic block copolymer (d-2) composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a butadiene polymer block. This further reduces the melt viscosity and further improves the low-temperature adhesion.

Then, the thermoplastic block copolymer (d-2) was previously converted to the thermoplastic block copolymer (d-
By incorporating the compound in 1), good granulation (pelletization) can be performed at room temperature, and handling operability during production is improved.

According to the seventh, eighth and ninth aspects of the present invention,
Thermoplastic block copolymer (e-1) comprising an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a partially hydrogenated isoprene polymer block or a completely hydrogenated isoprene polymer block, and a glass transition temperature of room temperature or higher Thermoplastic block copolymer (f-1) consisting of an aromatic vinyl polymer block having dots and a partially or partially hydrogenated butadiene polymer block
And a linear diblock-type thermoplastic block copolymer (f-2) composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a butadiene polymer block. Further, the melt viscosity is further reduced, and the adhesion at low temperatures is further improved.

Then, the above-mentioned thermoplastic block copolymer (f-2) was previously converted to the thermoplastic block copolymer (f-
By incorporating the compound in 1), good granulation (pelletization) can be performed at room temperature, and handling operability during production is improved.

According to the tenth, eleventh and twelfth aspects of the present invention, an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a partially or partially hydrogenated butadiene polymer block are used. Block composed of a thermoplastic block copolymer (g-1), an aromatic vinyl polymer block having a glass transition point of room temperature or higher, and a partially hydrogenated isoprene polymer block or a completely hydrogenated isoprene polymer block. A linear diblock-type thermoplastic block copolymer (h-) comprising an aromatic vinyl polymer block having a glass transition point of room temperature or higher and an isoprene polymer block. By incorporating 2), the melt viscosity is further reduced, and the low-temperature adhesion is further improved.

Then, the above-mentioned thermoplastic block copolymer (h-2) was previously converted to the thermoplastic block copolymer (h-
By incorporating the compound in 1), good granulation (pelletization) can be performed at room temperature, and handling operability during production is improved.

According to the invention of claims 13 and 14,
In the invention of claims 7 to 12, the base polymer (E) and the base polymer (F) or the base polymer (G) and the base polymer (H) further contain an α-olefin resin as a base polymer. Such an α-olefin resin is used as the base polymer (E).
And excellent compatibility between the base polymer (F) or the base polymer (G) and the base polymer (H), there is no exudation to the adherend material, and the tack force after the adhesive is solidified can be reduced. Further, the adhesion performance such as the adhesion at a low temperature is further improved without lowering the initial adhesion and cohesion.

Further, according to the inventions of claims 15 and 16, the hot melt adhesive composition obtained by the invention of claims 1 to 14 contains a tackifier and a plasticizing oil, so that the adhesive is formed. Performance is further improved.

[0101]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples and comparative examples of the present invention are shown below. (Examples 1 to 26 and Comparative Examples 1 to 11) Using the following raw materials, they were blended at the ratios shown in Tables 1 to 7, and were melted and kneaded at 140 ° C. with a universal mixing stirrer. A hot melt adhesive was produced.

Base polymer (A): SBS (Asaprene T-420 manufactured by Asahi Kasei Corporation, polystyrene block content 30% by weight, without diblock) Base polymer (B): SIS system (Clayton manufactured by Shell Chemical Company) D-1112, polystyrene block content 15% by weight, diblock content 40% by weight SIS system (Clayton D-KX406 manufactured by Shell Chemical Co., Ltd., polystyrene block content 16% by weight, diblock content 52% by weight) )

Base polymer (C): SIS (Clayton D-1107 manufactured by Shell Chemical Company, polystyrene block content: 15% by weight, diblock not included) Base polymer (D): SBS system (Asaprene JT- manufactured by Asahi Kasei Corporation) 38L, polystyrene block content 35% by weight, diblock content 70% by weight) SBS type (JSR TR2600 manufactured by Nippon Synthetic Rubber Co., polystyrene block content 32% by weight, diblock content 62% by weight)

Base polymer (E): SEPS (Septon 2007 manufactured by Kuraray Co., Ltd., polystyrene block content 30% by weight, without diblock) Base polymer (F): SEBS (Clayton G- manufactured by Shell Chemical Co., Ltd.) 1726, polystyrene block content 30% by weight, diblock content 70% by weight)

Base polymer (G): SEBS (Clayton G-1652 manufactured by Shell Chemical Company, polystyrene block content: 30% by weight, no diblock content) Base polymer (H): SEPS (Septon 2277 manufactured by Kuraray Co., Ltd.) (Polystyrene block content 30% by weight, diblock content 70% by weight)

Α-Olefin resin: Ube Tack 2385 (trade name, manufactured by Ube Lexen Co., Ltd., propylene-ethylene random copolymer, weight ratio: 94/6): Ube Tack 2780 (trade name, manufactured by Ube Lexen Co., Ltd. Random copolymer, weight ratio 65/35)

Tackifier: Alicyclic petroleum resin (Alcon P-100 manufactured by Arakawa Chemical Co.): Alicyclic petroleum resin (Alcon M-100 manufactured by Arakawa Chemical Co.) Plasticizing oil: Idemitsu Kosan Process Oil Nu-80 from Idemitsu Kosan Diana Process Oil PW-90 Antioxidant: Irganox 1010 from Ciba-Geigy

Using the hot melt adhesives obtained in each of the examples and comparative examples, the softening temperature, melt viscosity, adhesiveness, thermal stability and handling property were measured or evaluated by the following methods. Further, in Examples 21 to 26 and each comparative example,
The tack after the adhesive was solidified by cooling was measured by the following method. The results are shown in Tables 1 to 7.

(1) Softening Temperature The softening temperature was measured by the ring and ball method based on JIS K 2207.

(2) Melt Viscosity The melt viscosity at 140 ° C. and 160 ° C. was measured using a BM-type rotational viscometer based on JIS K6862.

(3) Adhesiveness The polyethylene film used for disposable diapers has a 0.
A bead was applied at an application amount of 05 g / m, and a nonwoven fabric (polyolefin-based) was pressed onto the bead to form a test piece. After the test piece was left in an atmosphere of 5 ° C. or 20 ° C. for 24 hours, the adherend was peeled off by hand to evaluate the adhesiveness. ○ (material destruction), × (interfacial delamination), △ (intermediate)
Indicated by

(4) Thermal stability 50 g of the adhesive was placed in a glass bottle, and 180 g without a lid was placed.
After leaving in a hot air circulating dryer at 24 ° C for 24 hours, take it out,
Immediately, the presence or absence of coloring was examined visually. ◎ (no coloring at all), ○ (almost no coloring), △ (slightly coloring),
X (clearly colored).

(5) Handling properties An adhesive is applied to a hot melt applicator (melt coating machine).
The workability at the time of charging into the tank was evaluated. ○ (Adhesive is easily separated from hand), △ (Adhesive is slightly separated from hand), × (Adhesive is difficult to separate from hand and remains on hand)
Indicated by

(6) Tack (after cooling and solidification) The adhesive is melted to form a sheet having a thickness of about 50 μm.
After being left for 24 hours in an atmosphere of 20 ° C., the sheet adhesive was touched with a finger to evaluate the tack. （(Easy finger separation), △ (slight resistance but finger separation), × (significant resistance and difficult finger separation).

[0115]

[Table 1]

[0116]

[Table 2]

[0117]

[Table 3]

[0118]

[Table 4]

[0119]

[Table 5]

[0120]

[Table 6]

[0121]

[Table 7]

[0122]

As described above, the hot melt adhesive of the present invention has low melt viscosity, good thermal stability, good coating workability, and high adhesiveness over a wide temperature range from low to high temperatures. In addition, the thermoplastic block copolymer is not sticky at the time of production of the hot melt adhesive, good granulation (pelletization) can be performed at room temperature, and handling workability at the time of production is improved. Further, the hot melt adhesive of the present invention,
There is no stickiness during use, and handling during use is improved.

Accordingly, the hot melt adhesive of the present invention is preferably a disposable diaper or a sanitary napkin using a polyolefin film or a nonwoven fabric having a large number of fine air holes, and performing streak-like, point-like, or surface-like bonding. It is suitable for manufacturing betting pads and the like.

Claims (16)

[Claims] 1. A hot-melt adhesive composition containing a base polymer (A) and a base polymer (B), wherein the base polymer (A) is an aromatic vinyl polymer having a glass transition point of room temperature or higher. A thermoplastic block copolymer composed of a coalesced block and a butadiene polymer block, at least one selected from the group consisting of linear triblock type, linear multiblock type and radial block type thermoplastic block copolymers. The base polymer (B) is a thermoplastic block composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and an isoprene polymer block. Linear triblock, linear multiblock and radial block thermoplastics A hot block comprising at least one type of thermoplastic block copolymer (b-1) selected from the group of lock copolymers and a linear diblock type thermoplastic block copolymer (b-2). Melt adhesive composition. 2. A hot-melt adhesive composition containing a base polymer (C) and a base polymer (D), wherein the base polymer (C) is an aromatic vinyl polymer having a glass transition point of room temperature or higher. A thermoplastic block copolymer composed of a united block and an isoprene polymer block, wherein at least one selected from the group consisting of a linear triblock type, a linear multiblock type, and a radial block type thermoplastic block copolymer; The base polymer (D) is a thermoplastic block composed of an aromatic vinyl polymer block having a glass transition point of room temperature or higher and a butadiene polymer block. Linear triblock, linear multiblock and radial block thermoplastics A hot block comprising at least one thermoplastic block copolymer (d-1) selected from the group of lock copolymers and a linear diblock-type thermoplastic block copolymer (d-2). Melt adhesive composition. 3. The weight ratio of the base polymer (A) to the base polymer (B) is from 95: 5 to 5:95, and the thermoplastic block copolymer (b) in the base polymer (B) is
The hot melt adhesive composition according to claim 1, wherein the weight ratio of -1) to the thermoplastic block copolymer (b-2) is 90:10 to 10:90. 4. The weight ratio of the base polymer (C) to the base polymer (D) is from 95: 5 to 5:95, and the thermoplastic block copolymer (d) in the base polymer (D) is
The hot melt adhesive composition according to claim 2, wherein the weight ratio of -1) to the thermoplastic block copolymer (d-2) is 90:10 to 10:90. 5. The base polymer (A) has a butadiene polymer block content of 10 to 95% by weight, and the base polymer (B) has a isoprene polymer block content of 10 to 95% by weight. The hot melt adhesive composition according to claim 1, wherein the hot melt adhesive composition is provided. 6. The content of the isoprene polymer block in the base polymer (C) is 10 to 95% by weight, and the content of the butadiene polymer block in the base polymer (D) is 10 to 95% by weight. The hot melt adhesive composition according to claim 2, wherein the hot melt adhesive composition is provided. 7. A hot-melt adhesive composition containing a base polymer (E) and a base polymer (F), wherein the base polymer (E) is an aromatic vinyl polymer having a glass transition point of room temperature or higher. A thermoplastic block copolymer composed of a coalesced block and a partially hydrogenated isoprene polymer block or a completely hydrogenated isoprene polymer block, and is a thermoplastic resin of a linear triblock type, a linear multiblock type, and a radial block type. The base polymer (F) is composed of at least one thermoplastic block copolymer (e-1) selected from the group of block copolymers, and the base polymer (F) has an aromatic vinyl polymer block having a glass transition point of room temperature or higher. Thermoplastic block composed of a partially hydrogenated butadiene polymer block or a fully hydrogenated butadiene polymer block. At least one thermoplastic block copolymer (f-1) selected from the group consisting of linear triblock type, linear multiblock type and radial block type thermoplastic block copolymers. A hot melt adhesive composition comprising a linear diblock-type thermoplastic block copolymer (f-2). 8. The weight ratio of the base polymer (E) to the base polymer (F) is from 95: 5 to 5:95, and the thermoplastic block copolymer (f) in the base polymer (F) is used.
The hot melt adhesive composition according to claim 7, wherein the weight ratio of -1) to the thermoplastic block copolymer (f-2) is 90:10 to 10:90. 9. The partially polymerized isoprene polymer block or the completely hydrogenated isoprene polymer block in the base polymer (E) has a content of 10 to 95% by weight, and the base polymer (F) has a partially hydrogenated isoprene polymer block. The content of the butadiene polymer block or the fully hydrogenated butadiene polymer block is from 10 to 95% by weight.
Or the hot melt adhesive composition according to 8. 10. A hot melt adhesive composition containing a base polymer (G) and a base polymer (H), wherein the base polymer (G) is an aromatic vinyl polymer having a glass transition point of room temperature or higher. A thermoplastic block copolymer composed of a coalesced block and a partially hydrogenated butadiene polymer block or a fully hydrogenated butadiene polymer block, and is a thermoplastic resin of a linear triblock type, a linear multiblock type, and a radial block type. The base polymer (H) comprises at least one thermoplastic block copolymer (g-1) selected from the group of block copolymers, wherein the base polymer (H) has an aromatic vinyl polymer block having a glass transition point of room temperature or higher. , Consisting of partially hydrogenated isoprene polymer blocks or fully hydrogenated isoprene polymer blocks, At least one type of thermoplastic block copolymer (h-1) selected from the group consisting of a block type, a linear multi-block type and a radial block type thermoplastic block copolymer and a linear diblock type thermoplastic block copolymer A hot-melt adhesive composition comprising: a coalescence (h-2). 11. The weight ratio of the base polymer (G) to the base polymer (H) is from 95: 5 to 5:95, and the thermoplastic block copolymer (h-1) in the base polymer (H). The hot melt adhesive composition according to claim 10, wherein a weight ratio of the thermoplastic block copolymer (h-2) to the thermoplastic block copolymer (h-2) is 90:10 to 10:90. 12. A partially hydrogenated butadiene polymer block or a fully hydrogenated butadiene polymer block in the base polymer (G) has a content of 10 to 95% by weight, and a partially hydrogenated butadiene polymer block in the base polymer (H). The hot melt adhesive composition according to claim 10 or 11, wherein the content of the isoprene polymer block or the fully hydrogenated isoprene polymer block is 10 to 95% by weight. 13. The hot melt adhesive composition according to claim 7, further comprising an α-olefin resin as a base polymer. 14. The α-olefin resin is used in an amount of 40 parts by weight based on 100 parts by weight of the base polymer (E) and the base polymer (F) or 100 parts by weight of the base polymer (G) and the base polymer (H). The hot melt adhesive composition according to claim 13, which is contained in a range of not more than part by weight. 15. The hot melt adhesive composition according to claim 1, further comprising a tackifier resin and a plasticizing oil. 16. The hot water according to claim 15, wherein 5 to 500 parts by weight of a tackifying resin and 5 to 350 parts by weight of a plasticizing oil are contained based on 100 parts by weight of the base polymer in total. Melt adhesive composition.