JPH0256321B2 - - Google Patents

Description

[Detailed description of the invention]

FIELD OF THE INVENTION This invention relates to improved small organism trap compositions. In detail, (A) polybutene, (B) ethylene-
This invention relates to an improved adhesive composition for capturing small organisms, which is made of a polar monomer copolymer and further contains (C) a rubbery organic polymer compound as required. The damage caused by small creatures, especially rodents, is enormous. Among them, rats can eat through not only agricultural products and food, but also lead pipes, causing gas to leak out.
It may expose the power lines and cause a fire. Several methods have been proposed and implemented to exterminate these small organisms, but the simplest of these is the use of sticky trapping agents on cardboard, cardboard, woodblocks, plastic films, and sheets. There is a method of applying it to the material to be coated, such as, and placing 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. In addition, 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, rendering it unusable or causing the floor to become unusable. There must be no such thing as contaminating the 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 % paraffin as an anti-sag agent; for,
80 parts polybutene, 10 parts butyl rubber and rosin,
Composition consisting of silica gel and 40 parts of polyethylene, JP-A-51-125123 and JP-B-Sho 53-18586
In the issue, polyisobutene (viscosity at 50℃
1000 poise) or 100 parts by weight of an 80:20 mixture of polyisobutene and natural rubber, and a composition containing 2 to 40 parts by weight of organic bentonite or 0.5 to 8 parts by weight of colloidal silica, JP-A-1972
−128225 contains polybutene 100 with a molecular weight of less than 12,000.
~700 parts by weight and 100 to 600 parts by weight of a natural or synthetic resin with a softening point of 70 to 100°C, JP-A-Sho
No. 52-98161 discloses a composition comprising 5% by weight of butyl rubber, 35% by weight of polybutene, and 60% by weight of rosin ester, toluene, and xylene. 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 using polybutene alone, the coating workability is good, but the adhesive strength is low and it is easy to run out or seep 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 ethylene-polar monomer copolymer having a polar monomer content of 1 to 30% by weight in the copolymer.
An improved adhesive composition for capturing small organisms characterized by comprising 0.5 to 30% by weight of (A) polybutene 70 to 99 with a number average molecular weight of 200 to 2500;
(B) an ethylene-polar monomer copolymer in which the polar monomer content in the copolymer is 1 to 30% by weight;
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 by Flory method. This is achieved by an adhesive composition for capturing small organisms. Hereinafter, the improved 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 flammability of the adhesive composition 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 ethylene-polar monomer copolymer referred to in the present invention refers to polar monomers that can be copolymerized with ethylene, including vinyl acetate, methyl acrylate, ethyl acrylate, acrylic acid,
Methyl methacrylate, ethyl methacrylate, methacrylic acid, carbon monoxide, or two or more of these can also be preferably used. Preferred copolymers include ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-ethyl acrylate-acrylic acid copolymer, and ethylene-ethyl acrylate copolymer.
vinyl acetate copolymers, etc., especially ethylene-
Vinyl acetate copolymer (EVA) and ethylene-
Ethyl acrylate copolymer (EEA) is preferred.
EVA is commercially available under the trade name of, for example, Nisseki Rexron Eva (Nippon Petrochemicals Co., Ltd.) or Evaflex (Mitsui Polychemical Co., Ltd.), and EEA is commercially available, for example, under the trade name of EEA Polymer (Nippon Unicar Co., Ltd.). These copolymers have a polar monomer content of 1 to
It is preferably 30% by weight, especially 2 to 28% by weight. If the polar monomer content exceeds this range, the flow-out and oozing effect of the capture agent will not be sufficient. In addition, if the polar monomer content is less than this range, the base material to which the capture agent is applied,
In particular, adhesion to metals such as stainless steel and aluminum plates deteriorates, causing the capture agent to slip off from the base material. Melt index (MI) of these copolymers
is from 0.1 to 200, preferably from 0.5 to 150, particularly preferably from 0.6 to 50. If the melt index exceeds this range, the effect of preventing the capture agent from flowing out will not be sufficient. If the melt index is smaller than this range, it will be difficult to dissolve and the adhesive strength will decrease. 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 adhesion becomes too hard, so the adhesion (tack) may decrease, 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. Excellent adhesives for capturing small organisms can be prepared by adding a wide range of amounts. In the present invention, in addition to the above-mentioned essential components (A) and (B), a rubbery 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. Examples of 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. can be exemplified. 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 adhesiveness 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, or an inorganic or organic filler or pigment. It can also be used by adding dyes, etc., or by adding a small organism attractant. Furthermore, the 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. 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:
It can also be used to capture harmful small creatures other than mice, such as cockroaches. The composition of the present invention can be applied to the above-mentioned materials of 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 7 and Comparative Examples 1 to 5 Various compositions shown in the table were manufactured and their performances were evaluated. The evaluation method is as follows. Adhesive strength: Based on the blow-buttack 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 measured using a tensile tester at 20°C. It was measured by Flow-out property and ooze-out property: The composition was applied to a thickness of 1 mm on an aluminum plate having a thickness of 0.3 mm, fixed vertically on a table, and left at 60° C. for 24 hours, after which the composition was observed to flow out. Further, the composition was applied to a thickness of 1 mm on a cardboard with a thickness of 1 mm, and the composition was left to stand at 60° C. for 24 hours in a horizontal position, and then the seepage of the composition onto the cardboard was observed. Finger touch 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 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 aluminum plate to a thickness of 1 mm, and the plate was placed in a mouse passage, and its trapping ability was observed. Examples 1 and 2 were (A) polybutene with a number average molecular weight of 2350 and (B) Nisseki Rexron Eva (MI: 2.0,
VA: 5.0wt%) or EEA copolymer (MI:
6.0, EA: 18wt%). This composition is colorless and odorless, and has adhesive strength suitable for capturing relatively small mice such as house mice, Japanese mice, and Japanese red mice, as well as cockroaches.
The coated product was in good condition with no running or seeping even at 60°C. Examples 3 and 4 were (A) polybutene with a number average molecular weight of 900, (B) Nisseki Rexron Eva (MI: 14, VA:
15wt%) or EEA copolymer (MI: 20,
EA: 18 wt%), and (C) polyisobutylene with a viscosity average molecular weight of 1200000 obtained by the Flory method. By adding EVA or EEA copolymer and a rubber-like organic polymer compound, the adhesive strength is strengthened, making it suitable for capturing medium to large rats such as black rats and brown rats. The product was excellent, with no run-off or seepage into the cardboard. Comparative Example 1 was a composition prepared by omitting component (B) of Example 3, but it flowed out from the aluminum plate and seeped into the cardboard. Example 5 is (A) polybutene with a number average molecular weight of 570,
(B) Nisseki Rexron Eva (MI: 3.1, VA: 15wt%)
and (C) viscosity average molecular weight by Flory method
It is a composition consisting of 1,600,000 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 6 is (A) polybutene with a number average molecular weight of 570,
This is a composition consisting of (B) EEA copolymer (MI: 20, EA 18wt%) and (C) butyl rubber with a viscosity average molecular weight of 350,000 obtained by the Flory method. Butyl rubber compounded as a rubbery organic polymer compound by applying polybutene with a relatively lower molecular weight than in Example 4 also has a lower molecular weight than in Examples 3 to 5, but the blending amount was reduced to 15% by weight. By increasing the amount, it showed a suitable adhesive strength, and due to the effect of adding the EEA copolymer, it was excellent with no run-off or seepage into the cardboard. Example 7 is polybutene with a number average molecular weight of 2350 and (B) Nisseki Rexron Eva (MI: 1.0, VA: 10wt).
%) The composition further added a hydrogenated aromatic petroleum resin as another component, which had the effect of further improving the performance of Example 1. This shows that the improved adhesive composition for capturing small organisms of the present invention has (A)
These results indicate that even if a tackifying resin or the like is further added in addition to component (B) or components (A), (B), and (C), it can be applied to this purpose. Comparative Example 2 is (A) polybutene with a number average molecular weight of 900 (B)
The composition was made of Evaflex (MI: 55, VA: 40 wt%) and (C) butyl rubber with a viscosity average molecular weight of 350,000 obtained by the Flory method, but it completely flowed off in a flow test at 60°C for 24 hours. Comparative example 3 is (A) polybutene with a number average molecular weight of 2350 (B)
The composition consists of polyethylene with MI: 50,
It is not sufficient in terms of run-out and seep-out properties, especially when applied to heat-resistant aluminum plates, etc. Polyethylene does not have polar groups, so it has poor adhesion to metal surfaces and has extremely poor run-out properties. It was hot. Comparative Examples 4 and 5 are adhesive compositions in which finely powdered silica and paraffin wax introduced in the prior patent were added, respectively, in place of the component (B) of the present invention. The addition of fine powder silica in Comparative Example 4 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 takes time for subsequent degassing and is expensive. In addition, in the adhesive containing paraffin wax of Comparative Example 5, the wax separated on the surface as a white color, 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 ooze-out 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) an ethylene-polar monomer copolymer having a polar monomer content of 1 to 30% by weight in the copolymer.
An improved adhesive composition for capturing small organisms, characterized by comprising 0.5 to 30% by weight. 2 (A) Polybutene 70 with number average molecular weight 200-2500
~99% by weight, (B) an ethylene-polar monomer copolymer in which the polar monomer content in the copolymer is 1 to 30% by weight
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 by Flory method. Adhesive composition for capturing small organisms.