JPH0257521B2 - - Google Patents

Description

[Detailed description of the invention]

FIELD OF THE INVENTION This invention relates to improved small organism trap compositions. Specifically, the adhesive for capturing small organisms is made of (A) polybutene, (B) polyethylene with a melt index of 0.04 to 35, and further contains (C) a rubbery organic polymer compound as required. Regarding the composition. Small creatures, especially rodents, cause a huge amount of damage, and rats in particular can eat through not only agricultural products and food, but also lead pipes, causing gas to leak, and exposing light lines, causing fires. There is also. Several methods have been proposed and implemented to exterminate these small organisms, but the simplest method is to use sticky trapping agents on cardboard, cardboard, wooden boards, plastic film, etc. There is a method of applying it to a material such as a sheet and installing it in the path of small organisms. In this case, the capture agent must satisfy the requirements that it must have excellent coating workability and excellent adhesiveness. Furthermore, when the capture agent is applied to the material to be coated in advance, it may flow out from the material to be coated during storage or use, or it may penetrate into the material and ooze out, making it unusable. The floor must not be soiled. As a composition for capturing small organisms of this type, for example, Japanese Patent Publication No. 48-16617 discloses a composition consisting of 86% polybutene, 10% butyl rubber, and 4% paraffin as an anti-sagging agent; No. 125123/1983 and Japanese Patent Publication No. 125123/1989, a composition consisting of 80 parts of polybutene, 10 parts of butyl rubber, and 40 parts of rosin, silica gel, and polyethylene in total.
No. 18586 contains 2 to 40 parts by weight of organic bentonite or 0.5 to 8 parts by weight of colloidal silica to 100 parts by weight of polyisobutene (viscosity of 1000 poise at 50°C) or an 80:20 mixture of polyisobutene and natural rubber. JP-A-52-128225 discloses a composition comprising 100 to 700 parts by weight of polybutene with a molecular weight of 12,000 or less and 100 to 600 parts by weight of a natural or synthetic resin with a softening point of 70 to 100°C;
JP-A No. 52-98161 contains 5% by weight of butyl rubber,
A composition comprising 35% by weight of polybutene and a total of 60% by weight of rosin ester, toluene, and xylene is disclosed. However, none of these examples satisfies all of the above requirements. Specifically, in compositions using paraffin wax, if a small amount is added, the flow-out prevention effect is not sufficient, but if a sufficient amount is added, the wax content will be absorbed into the adhesive layer over time after application. It migrates to the surface and reduces its adhesion, significantly reducing its capture ability.
Compositions using expensive organic bentonite or silica are relatively good in terms of anti-flow effect and adhesive strength, but these powders are bulky and entrain air during mixing, making it difficult to defoam after mixing. This is not preferable in terms of preparation time or cost. On the other hand, in the case of polybutene alone, the coating workability is good, but the adhesive strength is low and it is easy to run out or ooze out after coating, so that the balance of physical properties cannot be satisfied. An object of the present invention is to provide an adhesive composition for capturing small organisms that has excellent performance in meeting the above-mentioned requirements and is inexpensive. The object of the present invention is as follows: (A) polybutene with a number average molecular weight of 200 to 2500 70 to
99.5% by weight, and (B) an adhesive composition for capturing small organisms, characterized in that it consists of 0.5-29.5% by weight of polyethylene with a melt index of 0.04-35, and (A) polybutene 70 with a number average molecular weight of 200-2500. ~99
(B) 0.5 to 29.5 weight % of polyethylene having a melt index of 0.04 to 35; and (C) a rubbery organic polymer dissolved in the polybutene (A) and having a viscosity average molecular weight of 10,000 to 2,500,000 by Flory method; This is achieved by an adhesive composition for capturing small organisms characterized by comprising 0.5 to 29.5% by weight of a molecular compound. Hereinafter, the novel adhesive composition for capturing small organisms according to the present invention will be described in more detail. In the present invention, (A) polybutene means a number average molecular weight
200-2500, preferably 500-2000,
For example, it can be produced by polymerizing a part of the butane-butene fraction, which excludes butadiene, of the so-called C ₄ fraction produced by naphtha cracking. These polybutenes are commercially available, for example, under the trade name of Nisseki Polybutene (Nippon Petrochemicals Co., Ltd.). If the molecular weight of the polybutene is smaller than this range, the flash point will be low, which will reduce the safety of the adhesive composition when it is manufactured or used in a place with open flames such as a kitchen. Moreover, if it is larger than this range, the viscosity of the composition becomes too high, making it impossible to perform a smooth coating operation. The polyethylene (B) used in the present invention is obtained by polymerizing ethylene using a medium/low pressure method or a high pressure method, and has a melt index of 0.04 to 35, preferably 0.25.
~30 things. If the melt index is smaller than this range, it will take a high temperature and a long time to dissolve in PB, and if it is larger than this range, it will have good stickiness and will not have sufficient effect to prevent the capture agent from flowing out or oozing out. You can't get anything. The blending ratio of component (B) is 0.5 to the entire composition.
-30% by weight, preferably 1-25% by weight. If the blending ratio is less than the above range, the effect of preventing the capture agent from flowing out and oozing out will not be sufficient. On the other hand, if the above range is exceeded, the adhesive becomes too hard and the adhesive strength (tack) decreases, especially in winter.
This causes a decrease in the capture ability. The present invention is characterized in that by adding component (B), a sufficient effect of preventing run-off and improving adhesive strength can be obtained. An excellent adhesive for capturing small organisms can be prepared by adding . In the present invention, in addition to the above-mentioned essential components (A) and (B), a rubber-like organic polymer compound can be further blended as component (C) if necessary. The rubbery organic polymer compound (C) in the present invention is
Dissolved in the polybutene (A), and preferably has a viscosity average molecular weight of 10,000 to 2,500,000 according to the Flory method.
30,000 to 2,300,000. These rubbery organic polymer compounds include polyisobutylene, butyl rubber, natural rubber, polyisoprene rubber, styrene-butadiene rubber, styrene-butadiene block copolymer, styrene-isoprene block copolymer, butadiene rubber, and ethylene propylene terpolymer. I can give an example. Rubber-like organic polymer compounds having polarity, such as chloroprene rubber and nitrile rubber, are not preferred because they have insufficient compatibility with polybutene. Among these, preferred compounds are polyisobutylene or butyl rubber. If the molecular weight of the rubbery organic polymer compound is smaller than the above range, the adhesiveness will be insufficient and the ability to capture small organisms will be reduced. On the other hand, if it is larger than this range, it takes time to dissolve the polybutene and the viscosity becomes extremely high, making it difficult to apply it smoothly to the surface of the material to be coated. When component (C) is blended, its blending amount is 0.5 to 29.5% by weight based on the entire composition. in particular,
It is appropriately determined depending on the number average molecular weight of the polybutene (A) and the viscosity average molecular weight of the rubbery organic polymer compound (C) used, but is preferably 1 to 25% by weight. The composition of the present invention can be used as it is for capturing small organisms, but depending on the usage, it may be added with a tackifying resin such as ester gum, hydrogenated petroleum resin, polyterpene resin, etc., or an inorganic or organic filler. , pigments, dyes, etc., or a small organism attractant. Furthermore, a technique of adding a surfactant to a mixture of these adhesives and gradually adding water to obtain an adhesive in the form of a paste can also be applied to the adhesive of the present invention because it can be easily applied to the material to be coated. Can be done. Furthermore, since the composition of the present invention does not have a specific odor, it will not be repelled by mice and will not inhibit the effect of the attractant. The composition of the present invention comprises:
In addition to rats, it can also be used to capture small harmful creatures such as cockroaches. The composition of the present invention can be applied to the above-mentioned materials having various sizes, shapes, and structures. Hereinafter, the present invention will be explained in more detail with reference to Examples and Comparative Examples. Examples 1 to 5 and Comparative Examples 1 to 4 Various compositions shown in the table were manufactured and their performances were evaluated. The evaluation method is as follows. Adhesive strength: Based on the probe tack method, a 1/2-inch steel ball is brought into contact with the composition applied to a flat surface for 60 seconds, and the stress required to separate the steel ball from the applied surface is determined by a tensile test at 20°C. Measured by machine. Flow-out and ooze-out properties: The composition is applied to a thickness of 1 mm on a 1 mm thick cardboard, and the inclination angle is
The composition was fixed on a 45° stand and allowed to stand at 40°C for 15 hours, after which the composition was observed to flow out and seep out. Contact evaluation: Apply the adhesive to a thickness of 1 mm on the material to be coated, lightly touch the adhesive surface with your fingertip for less than 1 second at 20℃, and then suddenly remove the fingertip from the adhesive surface.
Evaluation was made based on the strength of the adhesiveness felt on the fingertips when pulled apart in a 90° direction. Those judged to have high adhesive strength were rated as ◎, and the adhesive strength was ranked as ○→△→× in order of decreasing adhesive strength. Mouse-capturing ability: The composition was applied to a 1-mm-thick cardboard to a thickness of 1 mm, placed in a mouse passage, and its trapping ability was observed. Example 1 is a composition comprising (A) polybutene with a number average molecular weight of 2350 and (B) polyethylene with a melt index of 0.1. This composition is colorless and odorless, and has adhesive strength suitable for capturing relatively small mice such as house mice, Japanese rats, and red rats, as well as cockroaches. It was in good condition with no leaks at all. Example 2 is (A) polybutene with a number average molecular weight of 900,
(B) Polyethylene with a melt index of 5.0 and (C) viscosity average molecular weight by Flory method
It is a composition consisting of 1,200,000 polyisobutylene. It has a strong adhesive force and is suitable for capturing medium to large rats such as black rats and brown rats.
Needless to say, it was an excellent product with no run-off or seepage from the cardboard used as the material to be coated. Comparative Example 1 was a composition prepared by omitting the polyethylene component (B) of Example 2, but it ran out and oozed out from the cardboard. In Comparative Example 2, polyethylene (Sumikasen; Sumitomo Chemical Co., Ltd.) with a melt index of 50 was blended in the same manner as in Example 1, but as in Comparative Example 1, there was significant run-out and seepage from the cardboard. I did it. Example 3 is (A) polybutene with a number average molecular weight of 470,
(B) Polyethylene with a melt index of 22, and (C) viscosity average molecular weight 1600000 by Flory method
The composition is made of polyisobutylene. By increasing the amount of component (B) and increasing the molecular weight of component (C), the prepared adhesive composition became even stronger, and in a mouse trapping test, it was confirmed that a brown rat weighing as much as 450 g could be captured. Example 4 is (A) polybutene with a number average molecular weight of 630,
This is a composition consisting of (B) polyethylene produced by a medium/low pressure method with a melt index of 8.5 and (C) butyl rubber with a viscosity average molecular weight of 350,000 produced by the Flory method. Butyl rubber compounded as a rubbery organic polymer compound by applying polybutene with a relatively lower molecular weight than Examples 1 and 2 also has a lower molecular weight than Examples 2 and 3, but the blended amount was 20% by weight. When the amount was increased to 50%, it exhibited a suitable adhesive strength, and was excellent with no run-off or oozing due to the effect of the polyethylene component. Example 5 is a composition in which (A) polybutene with a number average molecular weight of 2350 and (B) polyethylene with a melt index of 22 is further added with a hydrogenated aromatic petroleum resin as another component, and has the performance of Example 1. This was a good result that further improved the results. This means that the novel adhesive composition for capturing small organisms of the present invention can be prepared by adding a tackifying resin or the like in addition to the components (A) and (B) or the components (A), (B), and (C). This result indicates that the method can be applied to this purpose. Comparative Examples 3 and 4 are adhesive compositions in which finely powdered silica and paraffin wax introduced in the prior patent were added, respectively, in place of the polyethylene component (B) of the present invention. The addition of fine powder silica in Comparative Example 3 yields an adhesive equivalent to the component (B) composition of the present invention in terms of performance, but the fine powder silica is bulky and a large amount of air is mixed at the same time. This method is not advantageous in practical terms because it requires time for subsequent degassing and is expensive. In addition, in the case of the adhesive containing paraffin wax in Comparative Example 4, the wax separated as a white color on the surface, and the adhesive force showed 140 g in the adhesive test, but in the mouse capture test, a black rat weighing 75 g It ran right over my face. The reason for this is that, as shown by the results of the finger touch evaluation, this adhesive cannot exhibit its adhesive strength with light, short-term contact. Furthermore, test results for run-off and seepage properties were also poor.

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Claims (1)

[Claims] 1 (A) Polybutene 70 with a number average molecular weight of 200 to 2500
~99.5% by weight, and (B) 0.5-30% by weight of polyethylene having a melt index of 0.04-35. 2 (A) Polybutene 70 with number average molecular weight 200-2500
~99% by weight, (B) polyethylene with melt index 0.04-35
0.5 to 29.5% by weight, and (C) 0.5 to 29.5% by weight of a rubbery organic polymer compound dissolved in the polybutene (A) and having a viscosity average molecular weight of 10,000 to 2,500,000 according to the Flory method. Adhesive composition for capturing organisms.