JPS62241937A - Self-adhesive - Google Patents

Abstract

PURPOSE:To form a self-adhesive prevented from decreasing in tackiness and retentivity, being good in weather resistance and heat resistance and being useful for catching harmful organisms, by mixing hydrogenated polybutene with a polyolefin and an elastomer. CONSTITUTION:A self-adhesive is formed by mixing hydrogenated polybutene with a polyolefin and an elastomer. The polybutene includes homo- and co- polymers of 1-butene, cis-2-butene, trans-2-butene and isobutene, and it is preferably a liquid polymer of a number-average MW of 100-5,000. The degree of hydrogenation of the polybutene is desirably 70-100%. As the polyolefin, one having a number-average MW of about 200-200,000 is suitable, and atactic polypropylene is desirable. Examples of said elastomers include natural and synthetic rubbers. The mixing ratio among the respective components in said adhesive is usually such that about 80-500pts.wt. polyolefin and about 100-1,000 pts.wt. elastomer are used per 100pts.wt. hydrogenated polybutene.

Description

[Detailed Description of the Invention] [Industrial Application Field 1] The present invention relates to an adhesive, and more specifically, an adhesive that has and can maintain adhesiveness suitable for capturing harmful organisms. Regarding superior adhesives.

[Conventional technology and its problems] In the past, pests, especially rodents such as rats, have caused a great deal of damage, including damage to field crops, stored foods, gas pipes, electric wires, communication cables, etc. It's reaching. Adhesive compositions containing polybutene, polyolefin, and rubber are conventionally known as adhesive compositions for capturing such pests.

However, although the above-mentioned adhesive composition has relatively excellent adhesiveness, it has poor weather resistance and heat resistance, and when exposed to ultraviolet rays, wind and rain, or in a high-temperature environment, the adhesive properties deteriorate for a short time. There was the inconvenience that it would drop over time.

[Object of the invention J This invention has been made based on the above circumstances.

The purpose of this s#I is to provide an adhesive that prevents deterioration in adhesiveness and retention.

Another object of this invention is to provide an adhesive with improved weather and heat resistance.

[Help for solving the above problems] The gist of the present invention for solving the above problems is an adhesive characterized by containing a hydrogenated product of polybutene, a polyolefin, and an elastomer.

The polybutene is not particularly limited as long as it is a homopolymer or a copolymer of l-butylene, cis-2-butylene, trans-2-butylene, or isobunalene, and liquid polymers having a number average molecular weight of 100 to 5000 are used. is preferable, and also includes a liquid polymer mixture produced by polymerizing the mixture of - in 67) above. Although a blend of two or more homopolymers obtained by polymerizing each of the above-mentioned various monomers may be used as the polybutene, in this invention, a polymer obtained by polymerizing a mixture of each of the above-mentioned monomers is used. Preference is given to using mixtures.

In this case, as the mixture of the various types of hexamers, for example, the residue obtained by extracting butadiene from the C4 fraction during the thermal decomposition of naphtha can be suitably used. The polymer mixture is prepared using aluminum chloride as a catalyst at a reaction temperature of 5 to 130°C, and weighs 1 to 22 kg.
It can be obtained by polymerizing a mixture of the above monomers under a pressure of /crn'G. The molecular weight of the resulting polymer mixture is 2j1m of the reaction time and reaction temperature.
It can be determined by

The hydrogenated product of polybutene is prepared by combining the liquid polybutene and hydrogen in the presence of a hydrogenation catalyst at 50 to 150°C and 50 to 200 kg/crn'G.

It can be produced by contacting for 1 to 8 hours.

As the hydrogenation catalyst, any conventional catalyst can be used, such as a nickel catalyst, a palladium catalyst, a platinum catalyst, a platinum-tin catalyst, and the like.

The polybutene hydrogenation product has a hydrogenation rate of 80 to 100%, preferably 70 to 100%. In addition, here, the hydrogenation rate is the following formula.

[Water; number of double bonds in one molecule of g-added polybutene/number of double bonds in one molecule of non-hydrogenated polybutene] x.

The polyolefin has an a-average molecular weight of 200 to 200.
For example, polyethylene such as high density polyethylene, medium density polyethylene, low density polyethylene, linear polyethylene, polypropylene such as isotactic polypropylene, syndiotactic polypropylene, atactic polypropylene, polybutene, 4
-Methylpente.

Examples include Thor 1 resin. Among these, atactic polypropylene is preferred.

In addition, when polybutene is used as a polyolefin, the polybutene has a number average molecular line of 10,000 or more,
In particular, it is preferable that it is between toooo and 2000G.

Examples of the elastomer include natural rubber and synthetic rubber.

Examples of natural rubber include smoked sheet, raw rubber such as veil crepe, gutta-percha, balata, chlorinated rubber, hydrochloric acid rubber, and cyclized rubber.

In addition, examples of synthetic rubber include in-prene rubber (IR),
Butadiene rubber (BR), oil-extended polybutadiene rubber with aromatic oil or naphthenic oil added, styrene butadiene rubber (SBR), high styrene rubber, nitrile butadiene rubber (NBR), cis-butadiene rubber ( ci
s BR), chloroprene (CR), ethylene propylene copolymer rubber (EPM), ethylene propylene diene terpolymer rubber (EPDN), inbutylene isopre 75 /< -(I x R), inbutylene rubber 1
．． Chlorosulfonated polyethylene (C5M), polysulfide rubber (TR), die combination of ethyl acrylate and 2-chloroethyl vinyl ether (ACM), and copolymer of acrylonitrile and butyl acrylate (ANM)
Examples include acrylic rubber, urethane rubber, and silicone rubber.

These various elastomers can be used singly or in combination of two or more.

Among these various elastomers, isobutylene rubber and ethylene propylene copolymer rubber are preferred.

The blending ratio of hydrogenated polybutene, polyolefin, and elastomer is usually hydrogenated polybutene! Polyolefin is 80 to 5
00 thick parts, preferably 100 to 400 thick parts,
The amount of the elastomer is 100 to 1000 parts, preferably 200 to 700 parts, preferably 41 parts.

If the blending amount of the polyolefin is less than 80 parts by weight, even if the blending amount of the elastomer is within the above range, the retention of the adhesive will decrease and the blending amount will be soo i
If the amount is more than 9 parts, the tackiness of the adhesive may decrease even if the amount of elastomer is within the above range. Also, the amount of elastomer blended is too la8! l
If the amount is less than 1000 parts, the tackiness of the adhesive will decrease even if the amount of polyolefin is within the above range, and if the amount is more than 1000 parts, even if the amount of polyolefin is within the above range. Even if the pressure-sensitive adhesive is present within the range, the adhesive's retention properties may decrease and its fluidity at high temperatures may become too high.

The adhesive according to the present invention can be prepared by mixing or kneading the hydrogenated polybutene, polyolefin, and elastomer. There are no particular restrictions on the mixing or kneading method.

In the present invention, fillers such as zinc oxide, titanium dioxide, carbonic acid 11, silica, antioxidants, etc. may be appropriately blended into the adhesive.

Furthermore, when the adhesive of the present invention is used for trapping pests, a sex attractant may be added to the adhesive.
Harmful animals can be quickly captured.

This adhesive can be applied to, for example, paper boards, wooden boards, metal boards, etc., and can be suitably used to capture pests such as rats, squirrels, rabbits, etc., cockroaches, flies, and other pests. .

[Effects of the Invention] Since the adhesive according to the present invention contains a hydrogenated polybutene, polyolefin, and rubber, it has excellent retention properties and adhesive properties, as well as excellent heat resistance and weather resistance. Therefore, even when left outdoors or in a high-temperature environment for a long period of time, the strong retention and adhesive properties at the beginning of use do not deteriorate significantly, and pests can be reliably captured over a long period of time.

〔Example〕

Next, examples and comparative examples of the present invention will be shown.

The invention will be explained more specifically.

(Examples 1 to 3. Comparative Examples 1 to 3) Each component shown in Table 1 was added in the amount shown in Table 1, and 175
The mixture was kneaded at ℃ for 3 hours to obtain an adhesive.

This adhesive was evaluated for tackiness and retention.

Note that polybutene and hydrogenated polybutene were produced as follows.

That is, 5 g of aluminum chloride was placed in a 500 mJL autoclave, the pressure inside the autoclave was reduced using a vacuum pump, and then 50 g of n-butane was added as a solvent, and the aluminum chloride was dispersed in the solvent by stirring. After that, 42% isobutylene, 2% 1-butylene.
A mixture consisting of 18% n-butane and 40% n-butane (the residual liquid after extracting butadiene from the C4 fraction during the thermal decomposition of naphtha) was dropped into the autoclave over 20 minutes and reacted at a temperature of 10°C for 2 hours. (By adjusting the heating temperature and reaction time, the number average molecule I-. of polybutene used in Examples 1 to 3 was prepared.)

After the reaction, unreacted gas and n-butane were removed, 300 g of wood was added under water cooling to decompose aluminum chloride, and then the reaction product was dissolved in 500 ml of n-hexane in three portions. After extraction, n-hexafluoride was removed from the extract to obtain 80 g of polybutene with a number average molecule rjL of 350.

100 g of this polybutene was dissolved in 300 ml of n-hexane, charged into a single autoclave, and an additional 10 g of activated Raney nickel was added.

Next, after cooling with dry ice-acetone and reducing the pressure with a vacuum pump, hydrogen was introduced to 150 kg/c.
m'G, and then stirred up and down at 100°C for 4 hours.

Thereafter, the autoclave was allowed to cool, the pressure was removed, the catalyst was removed, and n-hexane was distilled off to obtain 98 g of a hydrogenated polybutene. The hydrogenation rate was 85%.

(Adhesive force L 180° peeling viscosity n force was measured according to JIS Z-0237. The film thickness of the adhesive is 0.3 mm.

(Holding force) Measured under a load of 5 kg according to JIS Z-0237.

In addition, "after weather tester test" in Table 1 means that 0.3 mm of adhesive was applied to a r50 x 50 mm paperboard.
"After applying the coating to a thickness of 100 mL and loading it into a Weather-O-meter at 45° C. and 80% humidity and irradiating it with a xenon lamp for 500 hours."

(Hereafter, margin)

Claims (1)

[Claims] (1) An adhesive characterized by containing a hydrogenated polybutene, a polyolefin, and an elastomer.