JPH0446241B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a composition for trapping harmful small organisms.
Specifically, the present invention relates to an adhesive composition for capturing harmful small organisms with improved adhesiveness, which is characterized by blending (A) polybutene, (B) crystalline polypropylene, and (C) a rubbery organic polymer compound. The damage caused by harmful small organisms, especially rodents, is enormous. Among them, rats can not only eat away at agricultural products and food, but also tear through lead pipes, causing gas to leak, and exposing electric light lines, causing fires. There is also. Several methods have been proposed and implemented to exterminate these harmful microorganisms, but the simplest method is to use sticky trapping agents on cardboard, cardboard, woodblocks, or plastic film. There is a method of applying it to a material to be coated, such as a sheet, and placing it in the path of harmful small organisms. In this case, the capture agent must satisfy the requirements that it must have excellent coating workability and excellent adhesiveness. Furthermore, after application, the scavenger must not run out of the material to be coated or penetrate the material and ooze out, contaminating the floor. Compositions for capturing this type of harmful small organisms include:
For example, in Special Publication No. 48-16617, 86% polybutene,
A composition consisting of 10% butyl rubber and 4% paraffin as an anti-sagging agent, JP-A-52-105217 discloses a composition consisting of 80 parts of polybutene, 10 parts of butyl rubber, and a total of 40 parts of rosin, silica gel, and polyethylene, JP-A-52-105217. No. 125123 of 1984 and Special Publication No. 53 of 1971
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 discloses butyl rubber 5%,
A composition comprising 35% by weight of polybutene and 60% by weight of rosin ester, toluene, and xylene is disclosed. However, none of these examples satisfies all of the above requirements. For example, in a composition 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-bleeding effect and adhesive strength, but these powders are expensive and entrain air during mixing, resulting in defoaming after mixing. This is undesirable from the standpoint of time and cost during adjustment. On the other hand, when polybutene is used 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 property balance cannot be satisfied. An object of the present invention is to provide an adhesive composition for capturing harmful small organisms that has excellent performance 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
99.3% by weight, (B) Melt flow index (MFI) 0.3~
0.2 to 20% by weight of crystalline polypropylene consisting of 20 isotactic structures, and (C) 0.5 to 29.8% by weight of a rubbery organic polymer compound dissolved in 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 trapping harmful small organisms with improved adhesiveness, which is characterized by comprising: Hereinafter, the adhesive composition for capturing harmful 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 5000-2000,
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, from Nippon Petrochemicals Co., Ltd. under the trade name Nisseki Polybutene. 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. If it is larger than this range, the viscosity of the composition becomes too high, making it impossible to apply it smoothly. The crystalline polypropylene (B) in the present invention is a crystalline polymer having an isotactic structure with a melt flow index (MFI) of 0.3 to 20, preferably 0.5 to 18. Specifically, crystalline polypropylene (PP) is obtained by polymerizing propylene and removing the by-product amorphous polypropylene by solvent fractionation.
It is. These polypropylenes are commercially available, for example, from Nippon Petrochemicals Co., Ltd. under the trade name Nisseki Polypro. The blending ratio of component (B) is as follows with respect to the entire composition:
0.2-20% by weight, preferably 0.5-15% 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, resulting in a decrease in adhesive force (tack), especially in winter, and the capture ability is reduced. The present invention is characterized in that the addition of component (B) prevents run-off, does not reduce initial adhesive strength, and provides sufficient effects to improve adhesive strength. For example, by selecting a brand of PP, Excellent adhesives for trapping harmful small organisms can be prepared by adding a wide range of amounts from 0.2 to 20% by weight. The rubbery organic polymer compound (C) as used 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-bundiene 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 harmful 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 29.8% 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 20% by weight. The composition of the present invention can be used as it is for capturing harmful 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. It can also be used by adding pigments, 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 also makes it easier to apply the adhesive to the material to be coated, and can be applied to the adhesive of the present invention. 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:
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 4 and Comparative Examples 1 to 3 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 copper ball is brought into contact with the composition applied to a flat surface for 60 seconds, and the stress required to separate the copper ball from the applied surface is applied at 20°C. Measured using a testing machine. Flow-out and ooze-out properties: The composition was applied to a 1-mm-thick cardboard to a thickness of 1 mm, fixed on a table with an angle of inclination of 45°, and left at 40°C for 15 hours, after which the composition flowed out and oozed out. 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 then suddenly remove the fingertip from the adhesive surface in a 90° direction. Evaluation was made based on the strength of the adhesive sensation felt by the fingertips. Those judged to have high adhesive strength are ◎, and the following grades are given in order of decreasing adhesive strength: 〇→△→×
And so. Mouse-catching ability: Apply the composition to a thickness of 1mm on a 1mm-thick cardboard and place it in the mouse passage.
We observed its catching ability. Example 1 is (A) polybutene with a number average molecular weight of 2350,
This is a composition consisting of (B) Nisseki Polypro FL-100 (MFI: 8) and (C) polyisobutylene with a viscosity average molecular weight of 1,200,000 obtained by the Flory method. small amount of PP
Due to the addition of , the coating was excellent, with no run-off or seepage from the cardboard used as the material to be coated. Of course, it has strong adhesion and is suitable for capturing medium to large rats such as black rats and brown rats. Comparative Example 1 is a composition prepared by removing PP, component (B), of Example 1, but there was some flow and seepage from the cardboard, and in the capture test, there was a slight slope of the floor in the cooking room of the cafeteria. This resulted in the adhesive composition flowing out and often staining the floor surface. In Example 2, (A) polybutene with a number average molecular weight of 900,
This is a composition consisting of (B) Nisseki Polypro JH-G (MFI: 4) and (C) polyisobutylene with a viscosity average molecular weight of 1,600,000 obtained by the Flory method. 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 3 is (A) polybutene with a number average molecular weight of 570,
(B) Nisseki Polypro EFL-100 (MFI: 7) and (C)
This is a composition made of butyl rubber with a viscosity average molecular weight of 350,000 obtained by the Flory method. The 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 1 and 2, but the blended amount was 20% by weight. When the amount was increased to 50%, it showed appropriate adhesion and was excellent with no flow or oozing due to the effect of the PP component. Example 4 contains (A) polybutene with a number average molecular weight of 2350, (B) Nisseki Polypro J4H-G (MFI: 20), (C) polyisobutylene with a viscosity average molecular weight of 1600000 obtained by the Florey method, and a hydrogenated aromatic compound as other components. This was a composition in which a family petroleum resin was added, and the performance of Example 1 was further improved. This result shows that the novel adhesive composition for capturing harmful small organisms of the present invention can be applied for this purpose even if a tackifying resin is added in addition to the components (A), (B), and (C). It was hot. Comparative Examples 2 and 3 are adhesive compositions in which, in place of the crystalline polypropylene (B) of the present invention, finely powdered silica and paraffin wax introduced in the prior patent were added, respectively. The addition of finely divided silica in Comparative Example 2 produces an adhesive that is equivalent to the component (B) of the present invention in terms of performance, but the finely divided silica is bulky and a large amount of air is mixed in at the same time. It is not advantageous in practical terms because it takes time to remove air after that and is 10 times more expensive than PP. In addition, in the case of the adhesive containing paraffin wax in Comparative Example 3, the wax separated as a white color on the surface and showed an adhesive force of 140 g in the adhesion test, but in the mouse trap 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.

【table】

【table】

Claims (1)

[Claims] 1 (A) Polybutene 70 with a number average molecular weight of 200 to 2500
~99.3% by weight, (B) Melt flow index (MFI) ~0.3
0.2 to 20% by weight of crystalline polypropylene having an isotactic structure of 20%, (C) 0.5 to 29.8% 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. An adhesive composition for capturing harmful small organisms with improved adhesiveness, characterized by comprising: