JP2001157539A - Adhesive for trapping small organism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject adhesive excellent in trapping rate, trapping performance sustainability, or the like. SOLUTION: This adhesive for trapping small organisms is obtained by essentially compounding the following components (1) to (4): (1) an A-B-A type styrene-diene-based block copolymer with a weight-average molecular weight of 50,000-500,000 and styrene content of 10-30 mol%, (2) a tackifying resin >=65 deg.C in softening point, (3) a 2nd tackifying resin liquid at 25 deg.C, and (4) a liquid rubber comprising a liquid polybutene 200-2,500 in number-average molecular weight, wherein the total compounding amount of the components (2) and (3) is 55-200 pts.wt. based on 100 pts.wt. of the component (1).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an adhesive for capturing harmful small organisms such as cockroaches and rats.

[0002]

2. Description of the Related Art Heretofore, various kinds of pressure-sensitive adhesives for capturing harmful small organisms have been known. For example, Japanese Patent Application Laid-Open No. 9-143443 discloses that 100 parts by weight of a rubber component comprising a blend of natural rubber and / or synthetic natural rubber and styrene rubber (blend ratio: 8/2 to 4/6) and a weight average molecular weight of 100,000 to 500,000 And a styrene content of 10 to 30 mol% and a coupling ratio of 80
% Of an ABA-type styrene-diene-based block copolymer of at most 10% by weight and at least 10 parts by weight of a liquid polyisoprene having a weight average molecular weight of 20,000 to 50,000.
An adhesive containing 70 parts by weight as an essential component is proposed.

Japanese Patent Publication No. 61-54664 discloses that a block copolymer rubber alone or a mixture of another rubber containing at least 25% by weight of the rubber and a tackifying resin having a softening point of 60 ° C. or less are essential. Adhesive materials having a specific range of viscosities and retention times as components have been proposed.

Further, Japanese Patent Publication No. 55-38100 discloses natural rubber, isoprene rubber, styrene butadiene rubber, chloroprene rubber, polyisobutylene rubber, butyl rubber, ethylene-propylene-diene rubber, acrylic rubber, and styrene-isoprene-styrene block copolymer. Coalescable, styrene-butadiene-styrene block copolymer, ethylene-1-butene copolymer, ethylene-vinyl acetate copolymer, thermoplastic elastomer composed of at least one of acrylic polymer, tackifying resin 40 to 150 weight Part process oil, animal and vegetable oils, paraffins, waxes,
Softener 1 such as polybutene and liquid polyisobutylene rubber
Viscoelastic materials are also disclosed wherein 0 to 250 parts by weight are added with a specific range of viscosity and retention time.

However, the conventional adhesive for trapping harmful small organisms, when applied to a catcher, has the following performance problems: The adhesive is cold-flowed and protrudes, leaving unnecessary portions; (Release paper) is less likely to be peeled off than the adhesive; harmful small creatures such as cockroaches are light in weight, agile and have strong legs, so they often escape and have a low capture rate; poor retention performance (preservability) . Various studies have been made on such problems, but no pressure-sensitive adhesive has been proposed to overcome these problems.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the state of the art as described above: when applied to a catching device, there is no protrusion due to cold flow; the release property of the release paper is good; It is an object of the present invention to provide an adhesive for capturing small creatures, which has a high trapping performance and a good maintainability of the capturing performance.

[0007]

Means for Solving the Problems The inventor of the present invention has intensively studied the components of the pressure-sensitive adhesive most suitable for capturing small organisms in order to achieve the above object, and has completed the present invention.

That is, the present invention is an adhesive for capturing small organisms, which comprises the following components (1) to (4) as essential components: Component (1): weight average molecular weight 50,000 to 50,000
0, ABA type styrene-diene block copolymer having a styrene content of 10 to 30 mol%; component (2): a tackifying resin having a softening point of 65 ° C. or higher; component (3): 25 ° C. Component (4): Liquid rubber containing liquid polybutene having a number average molecular weight of 200 to 2500 (however, the total blending amount of Component (2) and Component (3) is 100 parts by weight of Component (1)) 5 for
5 to 200 parts by weight).

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The pressure-sensitive adhesive of the present invention is designed to be suitable for capturing small organisms, and has the following component (1)
Component (4) as an essential component: Component (1): a styrene-diene-based block copolymer; Component (2): a tackifying resin having a softening point of 65 ° C. or higher; Component (3): Component (4): a liquid rubber containing polybutene.

The styrene-diene block copolymer of component (1) has a weight average molecular weight of 50,000 to 50.
AB- with a styrene content of 10-30 mol%
A type is used. Any of such block copolymers can be used as long as they are used in a conventionally known pressure-sensitive adhesive. Examples thereof include styrene-isoprene-styrene copolymer, styrene-butadiene-styrene copolymer, and hydrogenated products thereof. Can be used.

The component (1) may further contain natural rubber and / or synthetic natural rubber. In this case, the added amount of the natural rubber and / or the synthetic natural rubber is preferably ４ or less, more preferably １ ／ or less of the weight of the block copolymer. The reason is that the weight of the natural rubber and / or the synthetic natural rubber is 1 / the weight of the block copolymer.
If it exceeds 4, the melt viscosity of the pressure-sensitive adhesive at the melting temperature becomes too large, and it may be difficult to apply it to a catcher.

The tackifying resin whose component (2) has a softening point of 65 ° C. or more is added to increase the cohesive force of the pressure-sensitive adhesive at room temperature, and protrudes by cold flow when applied to a trap. And has the effect of improving the release property of the release paper. Such a resin has a softening point of 6
Any of those having a temperature of 5 ° C. or higher can be used. Hydrogenated rosin, glycerin ester rosin, modified rosins such as pentaeslit ester rosin and derivatives thereof, terpene resins,
Terpene phenol resins, xylene resins, petroleum resins, hydrogenated resins thereof, and styrene resins can be used. At this time, one kind of resin that is compatible with styrene and can sufficiently impart tackiness may be selected and used, or two or more resins of a resin having high tackifying property and a resin having good compatibility with styrene may be used. May be used in combination.

In the pressure-sensitive adhesive of the present invention, a tackifying resin (component (3)) which is liquid at 25 ° C. is used in addition to the tackifying resin of the component (2). As described above, the tackifying resin of the component (2) enhances the cohesive force of the pressure-sensitive adhesive at around normal temperature (5 to 50 ° C.), but tends to deteriorate cold resistance, and the adhesive performance varies depending on the use temperature. There is a fear that it can be overwhelmed. As a result of repeated trial and error in this regard, the present inventors have found that such a problem is that the resin having a softening point lower than that of the resin of the component (2), that is, the tackifying resin (component ( It has been found that the problem can be solved by blending 3)).

The component (3) includes a low polymer of a xylene resin, a low polymer of a terpene resin, a modified resin of a rosin, that is, a methyl ester of rosin and a methyl ester of hydrogenated rosin, and a triethylene of rosin. Glycol esters and triethylene glycol esters of hydrogenated rosin, diethylene glycol esters of rosin and diethylene glycol esters of hydrogenated rosin are recommended.
Above all, rosin having one OH group in the molecule is formed by reacting metallic sodium and alcohol on a rosin ester which is considered to have an attraction effect on small organisms such as cockroaches, and reducing the ester to form an alcohol hydroxyl group. A liquid resin (trade name: ABITOL: manufactured by Rika Hercules) is most recommended.

In the present invention, the component (2) is used in order to impart a high adhesive force required for capturing small organisms to the adhesive.
And the tackifying resin of the component (3) is 55 to 200 parts by weight, preferably 1 to 100 parts by weight of the component (1).
00 parts by weight to 200 parts by weight are blended. When the total amount of the tackifying resin to be added to the pressure-sensitive adhesive is less than 55 parts by weight based on 100 parts by weight of the component (1), the adhesion performance as a trapping pressure-sensitive adhesive, particularly the adhesion, is insufficient, and exceeds 200 parts by weight. And the adhesive becomes too resin-like, which hinders the required elasticity of the adhesive. The pressure-sensitive adhesive of the present invention has a sufficient tackiness to capture harmful small creatures such as cockroaches, which are light in weight, agile and strong in leg strength, because the compounding ratio of the tackifying resin is defined as described above. Therefore, the capture rate of pests is high.

The compounding amount of the component (2) is
It is preferably from 50 to 150 parts by weight, more preferably from 80 to 120 parts by weight, per 100 parts by weight. The reason is that the amount of component (2) added is
If the amount is less than 50 parts by weight with respect to 0 parts by weight, it is difficult to obtain sufficient adhesive strength, and if it exceeds 150 parts by weight, the elasticity of the adhesive may be impaired.

Further, the amount of the component (3) is preferably 5 to 50 parts by weight, more preferably 20 to 50 parts by weight, per 100 parts by weight of the component (1). This blending amount of the component (3) is set so that the blending ratio with respect to the component (2) is 1/30 to 1. That is, when the compounding ratio of the component (3) to the component (2) is less than 1/30, the adhesive force depending on the use temperature when only the tackifying resin having a softening point of 65 ° C. or more (component (2)) is used. Liquid resin that eliminates variation (component (3))
Is difficult to obtain the complementary effect of Conversely, if the mixing ratio exceeds 1, the effect of the liquid resin (component (3)) is so great that the adhesive may be cold-flowed when used near normal temperature (5 to 50 ° C.), which is not preferable.

Next, the component (4) is a liquid rubber containing polybutene, and has a function of preventing the adhesive force of the adhesive from changing over time. This component (4) improves the maintainability of the trapping performance of the pressure-sensitive adhesive, that is, gives the pressure-sensitive adhesive a “stickiness (viscous property)” for a long period of time so that the captured matter that has been secured is not removed. It is blended in. A pressure-sensitive adhesive containing no component (4) has good tackiness but lacks "stickiness (glue)" as a trapping pressure-sensitive adhesive. On the other hand, in the pressure-sensitive adhesive in which the components (2) and (3) are not blended and only the components (1) and (4) are blended, sufficient adhesiveness is obtained, but sufficient adhesiveness is not obtained. I can't get it.

It is essential that the liquid rubber of the component (4) contains polybutene. As this polybutene, a liquid rubber having a number average molecular weight of 200 to 2500 is used. The reason for this is that those having a number average molecular weight of more than 2500 have too large a molecular weight and cannot give the desired "stickiness" (glue) to the pressure-sensitive adhesive, and also increase the melt viscosity. When the molecular weight is less than 200, on the contrary, the melt viscosity of the pressure-sensitive adhesive is too low, so that the necessary "stickiness" (glue) of the capturing pressure-sensitive adhesive cannot be obtained.

The component (4) may contain a liquid rubber other than the liquid polybutene. The liquid rubber is not particularly limited, but may be liquid polyisoprene, liquid polybutadiene, liquid SBR, liquid NBR, liquid IIR, liquid C
R, liquid silicone rubber, liquid urethane rubber, liquid polysulfide rubber and the like are appropriately selected and used.

Component (4) is used in an amount of 10 to 100 parts by weight, preferably 10 to 50 parts by weight, per 100 parts by weight of component (1). The reason for this is
If the amount of the component (4) is less than 10 parts by weight, the effect of imparting viscosity is poor, and if it exceeds 100 parts by weight, the amount is too large.
This is because stringing of the adhesive is caused. The compounding amount of the component (4) is within a range in which the mixing ratio of the component (4) to the components (2) and (3) does not degrade the adhesive performance of the pressure-sensitive adhesive for capture, and can easily provide the adhesive property. It is also preferable from this point.

The pressure-sensitive adhesive of the present invention is used for effectively capturing harmful small creatures such as cockroaches having a light weight, agility and strong leg strength. For example, according to an experiment, the length of the body surface that touches the adhesive surface of a walking cockroach is about 1 mm at a minimum, and the adhesive force that can completely capture the cockroach with this small touch is 0.5N. / Mm
(Measured at 20 ° C.). Therefore, in order to obtain a sufficient harmful small organism capture rate, the adhesive strength (180 degree peeling) of the adhesive according to the present invention is a polytetrafluoride which substitutes the strength of the small organism for the adhesive strength to hair, feathers and skin. Desirably, the adhesive strength to the ethylene plate is at least 5 N / cm (measured at 20 ° C.).

The pressure-sensitive adhesive of the present invention can be applied to the capturing device by any conventionally known method, but is preferably applied by melt coating. For example, the pressure-sensitive adhesive of the present invention is applied to the heat-resistant release surface of the heat-resistant release paper by melt coating, and the pressure-sensitive adhesive release surface of the heat-resistant release paper is brought into contact with the at least a portion on at least a portion of the catcher body. Then, the pressure-sensitive adhesive of the present invention can be applied indirectly. In this case, the adhesive is 140
5000 to 100000 mmP at coating temperature of ~ 220 ° C
It is desirable that the adhesive be a hot melt adhesive having a melt viscosity of a · s. The reason for this is that if the melt viscosity at a temperature of 140 ° C. is less than 5000 mmPa · s, the viscosity as an adhesive is too low, and when applied to a capturing device, the adhesive will protrude or the release paper will be sufficiently peeled off. This is because they may disappear. On the other hand, at a temperature of 220 ° C., a melt viscosity of 10
If the viscosity exceeds 0000 mmPa · s, the melt viscosity is too high, which may make it difficult to apply to the trap itself.

The trapping pressure-sensitive adhesive of the present invention comprises, in addition to the above four essential components (1) to (4), process oils, animal and vegetable oils, polymer plasticizers and compound plasticizers, if necessary. Agents, paraffins, waxes and other softeners, fillers, colorants, crosslinkers, accelerators, antioxidants, antioxidants, fragrances,
An attractant, a feed, an oily scum and the like can be appropriately blended.

[0025]

EXAMPLES The present invention will be described in more detail below with reference to examples, but these examples are described for illustrative purposes only, and the present invention is not limited thereto. Not something.

[0026] was prepared adhesive of Examples 1-4 with the amount and components shown in Table 1 below Examples 1-4.

[0027]

[Table 1]

Next, these adhesives were melt-coated at a temperature of 160 ° C. on the heat-resistant release surface of release paper. The coating speed was 30 m / min for Examples 1 and 3, 20 m / min for Examples 2 and 4, and the coating thickness of the adhesive was 200 μm in all Examples. Next, the catcher is set so that the adhesive-applied surface of the release paper comes into contact with the main body of a paper-made container-type catcher as shown in FIG. 1 ((a) perspective view, (b) developed view). Release paper was stuck on the inner bottom surface of the main body. The release paper used was a kraft paper coated with clay on one side and coated with a silicone release agent from above, and had a heat-resistant release surface on one side. The weight of the release paper was 80 g / m ² .

When the melt viscosity of the pressure-sensitive adhesive at 160 ° C. was measured at the time of melt-coating, the pressure-sensitive adhesive of Example 1 was 37000 mmPa · s, and the pressure-sensitive adhesive of Example 2 was 732 mmPa · s.
00 mmPa · s, 24000 mm for Example 3
Pa · s, and 75500 mmP for Example 4.
a · s.

Next, the following functional test and performance test were performed using the manufactured capturing device and evaluated.

Functional test Normal test (using a catching tool immediately after production) (A) Capture rate test: A catching tool with peeled release paper was placed at the center of the test box, and a cockroach 10 was inserted from one direction of the test box.
Release the animals, 24 hours later count the number of animals caught in the capture device,
Calculate the capture rate. Capture rate = number of animals captured after 24 hours / number of animals initially captured × 100 [Evaluation] Excellent (◎): 100-90% Good (○): 89-80% Possible (△): 79-70 % Impossible (x): 69% or less (B) Cold flow test of adhesive: Immediately after production, the catch with release paper is left standing vertically for 24 hours, and the adhesive protrudes from between the release paper and the backing paper. Observe whether or not. [Evaluation] Excellent (◎): no protrusion Good (○): protrusion within 0.1 mm Possible (): protrusion within 0.5 mm Unacceptable (×): protrusion within 0.51 mm (C) Peeling test of heat-resistant release paper: After leaving the capturing device with release paper immediately after production at room temperature for 24 hours, peel off the release paper by hand,
Examine the ease of peeling. [Evaluation] Excellent (A): Very easily peeled Good (O): Peeled a little heavy but possible (△): Caught and difficult to peel No (X): No aging test at all (one month after production ) The aging tests (D) to (F) are for observing the retention performance of the capturing performance, and the above-mentioned normal tests (A) to (C) were performed using the capturing device one month after the production. Do each.

Performance test (G) Adhesion test for polytetrafluoroethylene plate (see adhesion of small creatures to hair, feathers and skin): 2k
After pressure bonding with a g roller at 50 mm / sec, the film is peeled off from the test plate at an angle of 180 °, and its resistance is measured at 20 ° C. (peeling speed 300 mm / min). (H) Holding force test (see the pseudo-collecting force of the adhesive): 10 m
A m-width test piece was stuck on a bakelite plate (sticking area 10
× 20 mm) and left for 20 minutes.
The time required for the test piece to fall at a temperature of 30 ° C. while suspending a load of g is measured. (I) Probe tack (gf) test (to see the adhesive stickiness): 13 hard spheres (diameter 10 mm, weight 4.5
g) is pressed by its own weight, and the resistance value when peeled off after 5 seconds is measured (peeling speed 300 mm / min). (J) Peeling force test of heat-resistant release paper: room temperature (20
C.) for 24 hours, the release paper is peeled at 90 ° angle (T peeling), and its resistance value is measured (peeling speed 3).
00 mm / min).

Table 2 shows the results.

[0034]

[Table 2]

As shown in Table 2, the pressure-sensitive adhesive of the present invention does not protrude due to cold flow when applied to a catcher, has good release properties of release paper, has a high capture rate, and maintains capture performance. It had good properties and had sufficient functions and performance as an adhesive for capturing small organisms.

Comparison of performance between the pressure-sensitive adhesive of the present invention and a commercially available pressure-sensitive adhesive A catcher manufactured using the pressure-sensitive adhesive of Example 1 described above and a commercially available comparative product (Comparative Example 1: Cockroach Hoihoi) (Taisho Pharmaceutical Co., Ltd.); Comparative Example 2: "Cockroach Catcher (Dainipponenzogiku Co., Ltd.)) was installed in a normal state for 10 days indoor (room temperature), 10 days outdoors, and sunshine weather (irradiation time: 8). Time; temperature: 63 ° C. ± 3 ° C .; humidity 60
%), The probe tack, the adhesion to the polytetrafluoroethylene plate and the holding power were evaluated in the same manner as described above.

Table 3 shows the results.

[0038]

[Table 3]

As shown in the results in Table 3, the pressure-sensitive adhesive of the present invention has particularly excellent holding power as compared with commercial products, and the properties of the pressure-sensitive adhesive do not deteriorate over time under various conditions. Was.

[Brief description of the drawings]

FIG. 1 (a) is a perspective view of a catcher used in an embodiment of the present invention. (B) It is a development view before assembling of the said capturing tool.

[Explanation of symbols]

 1 body of capture device 2 inside bottom

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaharu Taniguchi 3-20-28 Tachibana, Nishinari-ku, Osaka-shi, Osaka Incorporated Kyowa Co., Ltd. (72) Inventor Yoneo Hirakawa 3--20, Tachibana, Nishinari-ku, Osaka-shi, Osaka No. 28 Kyowa F-term (reference) 2B121 AA03 AA17 BA08 BA42 CC11 FA07

Claims (5)

[Claims] 1. An adhesive for capturing small organisms comprising the following components (1) to (4) as essential components: Component (1): weight average molecular weight 50,000 to 50,000
0, ABA type styrene-diene block copolymer having a styrene content of 10 to 30 mol%; component (2): a tackifying resin having a softening point of 65 ° C. or higher; component (3): 25 ° C. Component (4): Liquid rubber containing liquid polybutene having a number average molecular weight of 200 to 2500 (however, the total blending amount of Component (2) and Component (3) is 100 parts by weight of Component (1)) 5 for
5 to 200 parts by weight). 2. The small-animal capture according to claim 1, wherein the component (1) further comprises natural rubber and / or synthetic natural rubber in a weight of 1/4 or less of the weight of the block copolymer. Adhesive. 3. Component (1) is mixed with 50 to 150 parts by weight of component (2), 5 to 50 parts by weight of component (3), and 10 to 100 parts by weight of component (4) based on 100 parts by weight of component (1). The pressure-sensitive adhesive for capturing small organisms according to claim 1, wherein the pressure-sensitive adhesive comprises: 4. The pressure-sensitive adhesive according to claim 1, wherein the pressure-sensitive adhesive has an adhesive force of at least 5 N / cm (measured at 20 ° C.) to a polytetrafluoroethylene plate. Adhesive for capturing small organisms. 5. A hot-melt pressure-sensitive adhesive having a melt viscosity of 5,000 mmPa · s to 100,000 mmPa · s in a coating temperature range of 140 to 220 ° C. The adhesive for capturing small creatures according to Crab.