JPS585351A - Anticorrosive composition - Google Patents

Abstract

PURPOSE:To provide a petrolatum anticorrosive compsn. which has excellent heat resistance and good workability and in which bleeding at an elevated temperature and lowering in flexibility at a low temperature are suppressed, by adding a rubbery elastomer. CONSTITUTION:95-25wt% petrolatum and 5-75wt% rubbery elastomer such as polyisobutylene are mixed together at 30 deg.C or lower using a Banbury mixer to obtain an anticorrosive compsn. This compsn. may be used as a paste, but pref. as a sheet or a tape of 0.8-5mm. in thickness obtained by using a calender roll.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is suitable for manufacturing anticorrosion materials such as anticorrosion sheets and tapes.

Since Beterotstum has plasticity and excellent anti-corrosion properties, it is widely used as an OSS food material for pastes, sheets, tapes, piping, bridging piles, tank sit construction, etc.

However, since petrolatum has a low softening temperature, it has poor heat resistance.At high temperatures, O9 tam melts and flows out, and it becomes sticky and sticks to hands and clothes, resulting in poor workability. ℃ or less) K is less flexible and cannot be applied %/
It had the disadvantage of 14F.

The present invention overcomes the above-mentioned drawbacks and has excellent heat resistance.It does not leak out at high temperatures, does not get sticky and stick to hands or clothes, and has good workability without losing flexibility at low temperatures. This invention was made with the aim of providing a Vetritta 5-based anticorrosive composition that can be applied during construction, and its gist lies in the anticorrosive composition comprising petrolatum and a rubber-like elastic body.

Examples of the rubber-like elastic body used in the present invention include butadiene rubber, butyl rubber, nitrile rubber, ethylene-propylene terformer, polyisobutylene, butadiene-styrene rubber, styrene-butadiene-styrene block polymer, and styrene-isoprene. Examples include styrene block polymers, and butylene butylene is preferably used.

The ratio of hetrolatum to rubber-like elastic material is not particularly limited, but if the ratio of rubber soft elastic material decreases, heat resistance, workability, etc. will decrease, and if it increases, corrosion resistance will decrease. Preferably, the rubbery elastomer content is S to 7S% by weight, and more preferably, the hetrolatum content is 90-50% by weight, and the rubbery elastomer content is 10-150% by weight.

Since the anticorrosive composition of the present invention is made by combining hetrolatum with the above-mentioned rubber elastic body, any known conventional method may be adopted. A method of kneading the rubber-like elastic body by adding a small amount of hetrolatum, and feeding the hetrolatum and the rubber-like elastic body to a pumperly mixer and heating it at about 80°C.
The methods of mixing are listed below.

A filler such as #e Shun Calecum, clay, stone grain, guinic acid, a rust preventive agent such as tannin 1l11, etc. may be added to the above Jl composition.

The anti-corrosion #ll animal structure of the present invention is as described above, and although it may be used as a paste, it is preferably used in the form of a sheet or tape.

To manufacture the above-mentioned anti-corrosion tape, the composition may be formed into a sheet with a thickness of A8 to 5 cm using a calendar roll, an extruder, etc., and to make the anti-corrosion tape Examples include a method of impregnating a base material such as cloth, and a method of laminating the anticorrosive sheet on a base material of woven fabric, nonwoven fabric, or rubber sheet 4IIIP.

As mentioned above, the anti-corrosion layer composition of the present invention is made of hetrolatum and rubber-like elastic material, so it has excellent heat resistance, does not melt and flow out at high temperatures, and becomes sticky and sticks to hands and clothes. It can be applied with good workability without causing any damage or loss of flexibility at low temperatures.

Next, the present invention will be explained using examples.

Examples 1 to 3, Comparative Examples Hetrolatum (melting point: 80°C, degree: 10), Calcicum, Stone m (manufactured by John Man Co., Ltd., trade name: Asbestos?D@4)
The specified amount of tannic acid and tannic acid shown in Table 111 is supplied to a mixing pot, heated to 120°C, and then cooled. Polyisobutylene (manufactured by Esso Chemical Co., Ltd., trade name MML-11O) was supplied to gingerol to form a wire, and then the ε mixture was added little by little and kneaded. After sufficient mixing, the mixed material was fed to a calender roll KN to obtain an anticorrosive sheet with a thickness of 2 mm.

Measure the preparation, adhesive strength, temperature resistance, and low-temperature workability of the obtained anticorrosion sheet, and show the results in Table 1.

The physical properties of 0# are determined as follows.

O consistency - Measured at 2s°C in accordance with JIS K 2524.

OII Arrival Arrival - 20'1 CII Warm -Cut the sample to length 100- Place the end of the sample on the steel plate 2!1X11 ■Place it and press it back and forth with S-roll immediately. and glue the other end of the sample K100. Install the second weight and hang it vertically, and measure the falling time. was measured.

・Heat-resistant temperature - Cut the anti-corrosion sheet to a width of SOSWK, place it on the same fiK of a 2-inch steel pipe, set up a copper pipe, and measure the lowest temperature that deviates from 11KIO for 24 hours.

O Low temperature redness - A sample was obtained by cutting the anti-corrosion sheet into 50xsoo■, and the same W! The condition of the nine SO samples was observed after coating at AK-6℃.

×-Sample cracked.

Δ-Test IIIFK cracks occurred.

O: Good coating was achieved.

Claims (1)

[Claims] L Petrolatum and rubber-like elastic body! & Ru anticorrosion composition. 1. The anticorrosion composition according to claim ms1, wherein the veterotatum is 98#28% by weight and the rubbery W material is S to 7s% by weight. The anticorrosive composition according to claim 11 or 112, wherein the rubbery elastic body is polyisobutylene.