JPS6254744A - Pressure-sensitive adhesive composition - Google Patents

Abstract

PURPOSE:To provide a pressure-sensitive adhesive compsn. which has excellent tack, retention, etc. and hardly flows even under high-temperature conditions, by mixing a copolymer (or a hydrogenated derivative) of a cyclopentadiene monomer and a vinyl-substd. arom. hydrocarbon with polybutene. CONSTITUTION:A cyclopentadiene monomer (e.g., cyclopentadiene or methyl cyclopentadiene) and a vinyl-substd. arom. hydrocarbon (e.g., styrene or vinyltoluene) are copolymerized. The resulting copolymer and/or its hydrogenat ed derivative and polybutene and preferably other polyolefin (e.g., polyethylene or polypropylene) are mixed together to obtain the desired pressure-sensitive adhesive compsn. A polymer mainly composed of isobutene monomer is preferred as polybutene. The compsn. is suitable for use in capturing harmful animals such as mice.

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to an adhesive composition, and more specifically, to an adhesive composition that has excellent adhesiveness and retention and does not flow easily even at high temperatures.
゛[Conventional technology and its problems]. Conventionally, adhesive compositions containing polybutene and polypropylene have been known as adhesive compositions used to trap harmful animals such as rats. This adhesive composition has a tackiness to the touch (at room temperature, when touched with a finger,
Although it has a relatively good ability to stretch like a string over a cm, it has poor adhesion and retention, and has the disadvantage of sagging under high temperatures. For this reason, it is difficult to reliably capture mice and the like, and there are other problems such as the adhesive composition becoming sticky during summer months and being inconvenient to handle. Ta. This number 37113 was created based on the above city situation. In other words, the object of this invention is to solve the above-mentioned problems, have excellent adhesive strength and holding power, do not cause sagging (flow phenomenon),
Finger tack also aims to provide a good pressure-sensitive adhesive composition.

[Means for solving the above problems]

Reaction product (A) obtained by copolymerizing a cyclopentadiene monomer and a vinyl-substituted aromatic hydrocarbon and/or
Or its hydrogenated substance (B). It is an adhesive composition characterized by containing polybutene, and a reaction product (A) obtained by copolymerizing a cyclopentadiene monomer and a vinyl-substituted aromatic hydrocarbon and/or This is an adhesive composition characterized by blending the hydrogenated substance (B), polybutene, and a polyolefin other than polybutene. As the cyclopentadiene monomer, In. Examples include cyclopentadiene, methylcyclopentadiene, ethylcyclopentadiene, and dimers, trimers, and codimers thereof. Examples of the vinyl-substituted aromatic hydrocarbon include styrene, α-methylstyrene, vinyltoluene, and impropenylbenzene. A reaction product obtained by copolymerizing a cyclopentadiene monomer and a vinyl-substituted aromatic hydrocarbon (hereinafter referred to as (A))
Sometimes abbreviated as component. ) is a polymer component obtained by a copolymerization reaction of the cyclopentadiene monomer and the vinyl-substituted aromatic hydrocarbon. An example of a preferred method for producing this (^) component will be described next. The cyclopentadiene monomer and the vinyl-substituted aromatic hydrocarbon are mixed in an aromatic hydrocarbon solvent such as xylene, and heated at a temperature of 220 to 320°C, preferably 250 to 30°C.
When the solvent is removed after the reaction is heated to 0° C. for 1 to 8 hours, preferably 1.5 to 5 hours, the component (A) can be obtained. Moreover, this (A) r&minute is not limited to the above-mentioned method, and those obtained by other methods can also be used. The structure of component (A) obtained by such a production method is not yet established, and although it is presumed to be a copolymer of a cyclopentadiene monomer and a vinyl-substituted aromatic hydrocarbon, it is It may also contain homopolymers of gene monomers. In any case, the preferred component (A) in the present invention has a content of 80 to 30 tonne 1%, preferably 60 to 40 tonne 1%, of seven units derived from a cyclopentadiene monomer, and has a softening point. 40-160℃, preferably 70-140
°C, and the bromine number is 30-110 g/100g, preferably 40-70g/IGQg. In addition, from the viewpoint of raw material components, preferred (A) m is a copolymerization reaction product obtained by copolymerizing cyclopentadiene and styrene. Cyclopentadiene monomer and vinyl 21 Jll
A reaction product obtained by copolymerizing M aromatic group I with hydrogen hydride (
The hydrogenated product (component (A)) (hereinafter sometimes abbreviated as component (B)) can be produced by hydrogenating the (^)Ji component. A preferred method for producing component (B) is shown below. In a solvent such as a hydrocarbon such as cyclohexane or without using a solvent, in the presence of a N1, Pd, Co, Pt, Rh, catalyst, at a temperature of 130 to 300°C, preferably at 15°C.
The (^)1&min. and hydrogen are brought into contact with each other while heating at 0 to 260°C for 1 to 7 hours, preferably 2 to 5 hours. 1
! Since the structure of component (A) itself is not established, the component (B) to be t is a cyclopentadiene monomer and a vinyl-substituted aromatic hydrocarbon in addition to the hydrogenated product of the copolymerization reaction. May contain hydrogenated homopolymers of pentadiene monomers. In any case, preferred component (B) in this invention is Ja-containing monomer unit derived from cyclopentadiene.
is 80-30% by weight, preferably 60-40% by weight, and has a softening point of 50-165°C, preferably 75-15%
The temperature is 0°C, the bromine number is more than 3 and less than 7, and the degree of hydrogenation of the aromatic ring is 0 to 60%. In addition, a preferred component (B) from the viewpoint of raw material components is a hydrogenated product of a copolymerization reaction product obtained by copolymerizing cyclopentadiene and styrene. The polybutene used in this invention includes n-butene and/or
Alternatively, it can be obtained by polymerizing i-butene, but preferred is polymerization of i-butene or copolymerization of i-butene and a small amount of n-butene, and is a number-average molecule. is lOO~20000. Preferably 1000-10000
It is a liquid polybutene. This polybutene is produced using aluminum chloride as a catalyst, using the residual liquid obtained by extracting butadiene from the C4 fraction during naphtha cracking, for example, at 5 to 130°C and 1 to 22K.
It can be produced by polymerization at g/cm'G. Examples of the polyolefin other than polybutene include polyethylene and polypropylene, with polypropylene being preferred. Then, the polyolefin has a negative molecule: +E h< l OO
If O～lOOOOTEIh6 (F) is preferable and polyethylene is used as the polyolefin, the molecular weight of the polypropylene is 2000 to 600.
It is preferably 0, and even more preferably 2,000 to 5,000. The adhesive composition according to the present invention has the following blending ratio:
The above (A) component and/or (B) component is 7 to 30 balls! The amount of polybutene is selected within the range of 11%, preferably 10 to 25% by weight, and the polybutene is selected within the range of 50 to AO beads, i%, preferably 60 to 75% by weight, and the above (A) 1&
It is desirable that the total of component (B) and/or (B) and polybutene be 100.1 product %, and if a polyolefin other than polybutene is further blended, cyclopentadiene monomer and vinyl substituted aromatic carbonized The reaction product (A) obtained by copolymerizing with hydrogen or/its hydrogenated product (B) is 7 to 30%, preferably 6 to 30%.
Polybutene is selected within the range of 25% to 80%.
The amount of polyolefin excluding polybutene is preferably selected within the range of 60 to 75% by weight, and the amount of polyolefin excluding polybutene is selected within the range of 30% by weight or less, preferably 5 to 20% by weight, and the total of each component is It is desirable that it be 10017 J%. When the blending amount of the polybutene is less than 50%,
Even if the blending amount of the component (A) and/or the component (B) is within the above range, the retention of the adhesive composition decreases, and the amount of the blend 9 is greater than 8Q q% by weight. Even if the amount of component (^) and/or component (8) is within the above range, the tackiness of the pressure-sensitive adhesive composition may decrease. If the blending amount of the component (A) and/or the component (B) is less than 7%, even if the blending amount of polybutene is within the above range, the adhesive strength and holding power will decrease, Also, if the blending amount is more than 30!11Q%,
This may result in worsening of finger tack. The adhesion and holding power of this pressure-sensitive adhesive composition can be further improved by blending a polyolefin other than the above-mentioned polybutene, but the blending amount is 30% as described above.
It is preferable that the ton rj-% or less is 30 ton 7. j%
If the amount is more than that, the pressure-sensitive adhesive composition may become fluid. In addition, this adhesive composition contains the above-mentioned (A) component and/or the above-mentioned (B) component, and the above-mentioned polybutene. In order to increase the adhesion and holding power of the layer, it can be obtained by further blending polyolefins other than polybutene. Ordinary inorganic fillers may also be blended. Examples of inorganic fillers include calcium carbonate, magnesium carbonate, dolomite) charcoal salts, calcium sulfate, magnesium sulfate and other sulfates, calcium sulfite and other sulfites, talc, clay, mica, asbestos, Glass fiber, glass peas, calcium silicate, silicates such as montmorillonite, bentonite, iron,
Examples include metal powders such as zinc and aluminum, ceramics such as silicon carbide and silicon nitride, their whiskers, carbon black, graphite, iR fibers, etc. These inorganic fillers may be used alone or in combination with two or more of the above. An inorganic filler can be mixed and used. Among the various inorganic fillers, preferred are calcium carbonate, ti, m-calcium, calcium silicate, and the like. The adhesive composition according to the present invention can be obtained by blending each of the above-mentioned components, and there are no particular limitations on the procedure for blending, but a preferred blending method is to first add Makoto (A) to polybutene. component and/or said CB)
It is preferable to blend ff1 and further blend a polyolefin other than polybutene. By blending each of the components in accordance with the blending procedure described above, each component can be mixed uniformly. This pressure-sensitive adhesive composition can be suitably used as a pressure-sensitive adhesive for exterminating harmful animals by further adding medicinal components such as insecticidal, rodenticidal, and acaricidal components. [Effects of the Invention] According to the present invention, an adhesive composition that is made by blending polybutene and a specific polymer has excellent adhesive strength and holding power, does not exhibit flow phenomenon even in summer, and has good tackiness to the touch. It can be done. [Examples] Next, the present invention will be explained in more detail by showing Examples and Comparative Examples. (Examples 1 to 4. Comparative Examples 1 to 2) 5 g of aluminum chloride was placed in a 500 mJl autoclave.
After reducing the pressure with a vacuum pump, 50 g of n-butane was added as a solvent. After sufficiently dispersing aluminum chloride by stirring, 200 g of raw material (a mixture of 42% by weight of i-butene, 12.18% by weight of butene, and 40% to 111% of n-butane) was heated at 5 to 50°C. The mixture was dropped over a period of 20 minutes and reacted at 10°C for 30 minutes to 2 hours. After the reaction is completed, unreacted gas and n-butane are removed,
Aluminum chloride was decomposed by adding 300 g of water under water cooling, and then extracted three times with 500 rnl of n-hexane.
Thereafter, n-hexane was distilled off to obtain polybutene. Polybutenes having the molecular weights shown in Table 1 were produced by varying the reaction temperature and time. In a polymerization reaction vessel equipped with a stirrer and purged with nitrogen, 1QOg of xylene (solvent), 100g of cyclopentadiene, and 100g of styrene were charged, heated to 260°C, and copolymerized for 25 hours with stirring. The reaction was carried out. After the reaction, xylene was removed and 180g of the cyclopentadiene-styrene copolymerization reaction product was obtained (f'). The content of styrene as a unit is 50% by weight, and the bromine number is 56g/100g
The acid value was 1 mgKOH/g, and the Gardner hue was 8. Synthesis of component (B) In a reaction vessel equipped with a stirrer and purged with nitrogen, 100 g of the cyclopentadiene-styrene copolymerization reaction product obtained in the production of component (A), cyclohexane (solvent) long, and P
d catalyst (supporting 0.5% Pd metal) was charged, and hydrogen was injected to produce 30 K g/c tn'.
G, heated to 200° C. and stirred F for 4 hours to carry out hydrogenation reaction. After the reaction was completed, the solvent, catalyst, etc. were removed to obtain 100 g of a hydrogenated cyclopentadiene-styrene copolymerization reaction product. This hydrogenated product has a softening point of 120°C, a bromine number of 5.1 g/100 g, and an aromatic ring hydrogenation rate of 3.
4%, and the Gardner hue was 1 or less. In addition,
The acid value was less than 1 mg KOH/g. For Examples 1 and 2, (5) the polybutene obtained by the above synthesis, (A) It, min or (B) component. A pressure-sensitive adhesive composition was obtained by kneading the mixture at 120° C. for 3 hours in the amounts shown in Table 1. Moreover, regarding Examples 3 and 4,
Polybutene obtained by the above synthesis, component (A) or (B
) IA component and polypropylene (manufactured by Idemitsu Petrochemical Co., Ltd., Idemitsu Polypropylene APP, molecular weight 4000)
The mixture was kneaded at 70° C. for 3 hours to obtain a pressure-sensitive adhesive composition. For Comparative Examples 1 and 2, adhesive compositions were obtained in the same manner as in Example 3.4 except that component (A) or component (B) was not blended. This adhesive composition was evaluated for adhesive strength, holding power, fluidity, and tackiness to the touch. (Adhesive strength) Based on JIS Z-0237, the adhesive strength was measured by peeling off the bow at 180°. The film thickness of the adhesive composition is 0.3 mm. (Holding force) Measured under a load of 5 kg in accordance with JIS Z-0237. (Fluidity) A 50 x 50 mm paperboard coated with this adhesive composition to a thickness of about 1 mm was hung in an oven at 80°C for 24 hours, and the adhesive composition was checked for sagging. I visually inspected it. (Finger touch tack) When the adhesive composition was touched with a finger at room temperature and stretched like a string at 50°C or higher, it was evaluated as "good".

Claims (2)

[Claims] (1) It is characterized by blending polybutene with a reaction product (A) obtained by copolymerizing a cyclopentadiene monomer and a vinyl-substituted aromatic hydrocarbon and/or its hydrogenated product (B). A pressure-sensitive adhesive composition. (2) a reaction product (A) obtained by copolymerizing a cyclopentadiene monomer and a vinyl-substituted aromatic hydrocarbon and/or its hydrogenated product (B), and polybutene,
An adhesive composition comprising a polyolefin other than polybutene.