JPH07252422A - Anticorrosive composition and anticorrosive tape - Google Patents

Abstract

PURPOSE:To obtain the subject composition, containing a petrolatum as a principal component and further a process oil therein, excellent in anticorrosive properties, application operating efficiency (in the winter season) and tackiness within a wide temperature range and useful as an anticorrosive material for pipes, bridging piles, parts around installed tanks, etc. CONSTITUTION:This anticorrosive composition contains (A) a petrolatum as a principal component and further (B) an aromatic, a naphthenic or a paraffinic process oil therein. The component (B) is contained in an amount of preferably 3-30 pts.wt., especially 5-20 pts.wt. based on 100 pts.wt. component (A). Since the component (B), excellent in compatibility with the component (A) and having low temperature sensitivity is contained, the composition is hardly affected by a change in temperature and manifests excellent tackiness at a temperature within a wide range of low to high temperatures and further excellent application operating efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticorrosion composition and an anticorrosion tape produced by using the anticorrosion composition.

[0002]

2. Description of the Related Art Petrolatum has plasticity and has an excellent anticorrosion effect, so that it can be used in the form of paste, tape, sheet, etc.
Widely used as an anticorrosion material for pipes, bridge piles, and around tanks. However, since petrolatum has a high temperature sensitivity, it has poor heat resistance and softens at high temperatures to contaminate hands and clothes. Also, since it has poor cold resistance, it loses flexibility at low temperatures (5 ° C or lower). There was a problem that the deployment force of the anticorrosion tape was heavy and construction was difficult.

In order to address the above-mentioned problems, a composition for anticorrosion comprising petrolatum and a rubber-like elastic material has been proposed (Japanese Patent Publication No. 61-42822), but in the case of this composition, the heat resistance is improved. However, the effect of improving cold resistance is not yet sufficient.

[0004] In order to improve the cold resistance of the anticorrosion composition, a method of blending liquid polybutene with petrolatum is also commonly used. However, liquid polybutene also has a high temperature sensitivity, so that the effect of improving cold resistance is improved. Is not sufficient, and the actual situation is that during construction in winter, the anticorrosion tape is soaked in hot water before construction, for example, to soften it and use it with less spreading force. The problem of poor workability has not been resolved.

[0005]

SUMMARY OF THE INVENTION In view of the above points, the present invention provides an anticorrosion composition that exhibits excellent adhesive properties in a wide temperature range, and a low-temperature composition prepared using the anticorrosion composition. It is an object of the present invention to provide an anticorrosion tape which has a low spreading force and is excellent in workability in winter.
The anticorrosion tape mentioned here includes not only the anticorrosion tape but also anticorrosion sheet and anticorrosion film.

[0006]

An anticorrosive composition of the invention according to claim 1 (hereinafter referred to as "first invention") is characterized in that it contains petrolatum as a main component and a process oil. Therefore, the above object is achieved.

Further, the anticorrosion tape of the invention according to claim 2 (hereinafter referred to as "second invention") is characterized in that the anticorrosion composition of the first invention is laminated or impregnated on a support. Therefore, the above object is achieved.

The anticorrosion composition according to the first aspect of the present invention must contain petrolatum as a main component and process oil as an essential component.

The above petrolatum is a semi-solid waxy substance obtained from petroleum, and has a melting point of about 50 to 150 ° C and 25 ° C.
And has a characteristic of about 50 to 250 in consistency. The type of petrolatum used as a main component in the anticorrosion composition of the first invention is not particularly limited, but considering comprehensively the anticorrosion property, the tackiness, the workability and the like required for the anticorrosion tape, High melting point and low consistency are preferred.

The process oil contained as an essential component in the anticorrosion composition of the first invention is a hydrocarbon which is a petroleum fraction having a high boiling point and is used as a softening agent for rubber, plastics and the like. . The above-mentioned process oils are roughly classified into three types: aromatic, naphthene-based, and paraffin-based, but the type of process oil used in the anticorrosive composition of the first invention is not particularly limited. One or more of the three types of process oils are preferably used.

Since the above process oil has low temperature sensitivity and excellent compatibility with petrolatum, it can be contained in petrolatum as a softening agent to compare with the case of containing softening agents such as liquid polybutene and various plasticizers. Then
The adhesiveness at low temperature is improved without lowering the heat resistance of the anticorrosion composition, and the deployability of the obtained anticorrosion tape at low temperature is lightened, so that the workability in winter is remarkably improved.

The content of the above process oil with respect to petrolatum is not particularly limited, but about 3 to 30 parts by weight of the process oil is preferable per 100 parts by weight of petrolatum, and more preferably about 5 to 20 parts by weight. preferable.

When the content of the process oil is less than about 3 parts by weight per 100 parts by weight of petrolatum, the anticorrosion tape obtained does not have a sufficiently low spreading force at low temperatures, and conversely, it exceeds about 30 parts by weight. The heat resistance of the anticorrosion tape decreases.

In the above anticorrosive composition, if necessary, fillers such as calcium carbonate, clay, talc, silica and mica, titanium oxide,
Various additives such as carbon black, pigments such as red iron oxide, tannic acid, alkyl sulfonates, amines, rust preventives such as oxidized paraffin salts may be contained.

The method for preparing the anticorrosive composition according to the first aspect of the present invention is not special, and any conventionally known method may be employed.
50-130 various additives such as fillers, pigments, rust preventives, etc.
A desired anticorrosive composition can be obtained by mixing or kneading at a temperature of about ° C.

The anticorrosion tape according to the second invention is obtained by laminating or impregnating a support with the anticorrosion composition obtained above.

The type of the above-mentioned support is not particularly limited, and examples thereof include woven cloth, non-woven cloth, various plastic sheets or foams, various rubber sheets or foams, metal foils, and the like. Used for.

When the support is a non-porous material such as a plastic sheet, a rubber sheet or a metal foil, the support may be laminated on the support to form a porous material such as a nonwoven fabric. In the case of the material, the anticorrosion composition may be formed by impregnating the support with the anticorrosion composition.

The method for laminating or impregnating the above-mentioned anticorrosion composition on the support is not special, and any conventionally known method may be employed, for example, 50 to 130 ° C. by a calender roll, an extruder or the like. The anticorrosion composition may be formed into a sheet with a thickness of about 0.5 to 5 mm under moderate heating and laminated on a support, or the anticorrosion composition may be added to 50 to 13
The support may be impregnated by immersing the support in a liquid heated and melted at about 0 ° C.

The anticorrosion tape obtained as described above may be wound into a roll for use, or may be punched into the shape of the object to be coated and wrapped around the object.

[0021]

The anticorrosion composition according to the first aspect of the present invention contains the process oil, which has excellent compatibility with petrolatum and low temperature sensitivity, in the main component petrolatum. Exhibits excellent adhesive properties over a wide temperature range up to high temperatures.

Since the anticorrosion tape according to the second aspect of the present invention comprises the above anticorrosion composition, it has a low spreading power at low temperatures and excellent workability even in winter.

[0023]

EXAMPLES In order to explain the present invention in more detail, examples will be given below. In addition, "part" in an Example means a "weight part."

(Example 1)

( 1) Preparation of anticorrosion composition "Petrolatum SG-120" (2 ) as petrolatum
Consistency 71 at 5 ° C, melting point 124 ° C, manufactured by Yamabun Yuka Co., Ltd.)
100 parts of aromatic process oil "Aromax # 1" (manufactured by Fuji Kosan Co., Ltd.) as process oil
6 parts, 98 parts of crown clay and 0.25 part of tannic acid were mixed by stirring at about 130 ° C. using a kneader to obtain an anticorrosive composition. JIS K-2 of the obtained anticorrosion composition
Consistency measured according to 235 "Petroleum wax" (23
C.) was 53.

( 2) Preparation of Anticorrosion Tape Using a non-woven fabric as a support, the non-woven fabric is dipped in the above anticorrosion composition melted at about 130 ° C. to impregnate the anticorrosion composition, and then taken out while squeezing and winding. Take, thickness 1.5m
m, a width of 50 mm, and a winding length of 10 m were produced.

( 3) Evaluation Various performances of the obtained anticorrosion tape were evaluated by the following methods. The results are shown in Table 1.

Adhesive strength : Width 25 m in accordance with the adhesive strength test of JIS Z-1902 "Petrolatum type anticorrosion tape"
The anticorrosion tape cut into m and 150 mm in length has a bonding area of 2 at one end of a cold rolled stainless steel plate (SUS304) having a width of 50 mm, a length of 125 mm and a thickness of 1.5 mm.
After pasting to 5mm x 50mm, 25μm thick and 25mm x 150mm on anticorrosion tape
An adhesive test piece was prepared by pasting and pressing the polyester film of No. 1. After 30 minutes of pressure bonding, using a Shopper-type tensile tester, sandwich the polyester film on the upper chuck and the SUS304 on the lower chuck, and pull at a pulling speed of 300 mm / min to obtain an adhesive force (kg /
25 mm × 50 mm) was measured. In addition, this test is 23 ℃
And 0 ° C. under two conditions.

Heat resistance: A test piece prepared according to the heat resistance test of JIS Z-1902 was left at 23 ° C. for 1 hour, then kept horizontally in a thermostat at 80 ° C., and after 24 hours, petrolatum was dropped. The presence or absence of was observed.

Spreading power: After a corrosion-preventing tape having a width of 50 mm and a winding length of 10 m was left in an atmosphere of 5 ° C. for 24 hours,
Set in a Shopper type tensile tester at the same temperature and develop at a tensile speed of 200 mm / min, and develop force (kg / 50 mm)
Was measured.

(Example 2)

In the preparation of the anticorrosive composition, "Aromax #" was added to 100 parts of "Petrolatum SG-120".
Example 1 was carried out after obtaining an anticorrosion composition having a consistency (23 ° C) of 48 in the same manner as in Example 1 except that the amount of "1" was 8 parts.
A tape for anticorrosion was prepared in the same manner as in.

Various properties of the obtained anticorrosion tape were evaluated in the same manner as in Example 1 and the results are shown in Table 1.

(Example 3)

In the preparation of the anticorrosive composition, instead of the aromatic process oil as the process oil,
Naphthenic process oil "Flex # 1150N"
After obtaining an anticorrosion composition having a consistency (23 ° C.) of 60 in the same manner as in Example 1 except that (Fuji Kosan Co., Ltd.) was used, an anticorrosion tape was produced in the same manner as in Example 1.

Table 1 shows the results of evaluation of various properties of the obtained anticorrosion tape in the same manner as in Example 1.

(Example 4)

In the preparation of the anticorrosive composition, instead of the aromatic process oil as the process oil,
Paraffin-based process oil "Process P-100"
After obtaining an anticorrosion composition having a consistency (23 ° C.) 57 in the same manner as in Example 1 except that (Fuji Kosan Co., Ltd.) was used, an anticorrosion tape was produced in the same manner as in Example 1.

Various properties of the obtained anticorrosion tape were evaluated in the same manner as in Example 1 and the results are shown in Table 1.

(Comparative Example 1)

"Petrolatum SG-120" was used in the preparation of an anticorrosive composition without using process oil.
Liquid polybutene “Polybutene HV-3” per 100 parts
00 "(manufactured by Nippon Petrochemical Co., Ltd.), except that 16 parts of the anticorrosion composition was obtained in the same manner as in Example 1 and then obtained in the same manner as in Example 1 with a consistency (23 ° C.) 51. Was produced.

Table 1 shows the results of evaluating various properties of the obtained anticorrosion tape in the same manner as in Example 1.

[0043]

[Table 1]

[0044]

As described above, the anticorrosive composition according to the first aspect of the invention exhibits excellent low-temperature adhesive strength and heat resistance.
Further, the anticorrosion tape according to the second aspect of the present invention has excellent adhesive properties in a wide temperature range and can be easily developed even at low temperatures, and thus has excellent workability in winter.

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Claims (2)

[Claims] 1. An anticorrosive composition comprising petrolatum as a main component and process oil. 2. An anticorrosion tape, comprising a support and the anticorrosion composition according to claim 1 laminated or impregnated on the support.