JPS58198550A - Rubber composition - Google Patents

Abstract

PURPOSE:To provide a non-tacky rubber compsn. suitable for use in the transportation of tacky materials such as oil sand, by vulcanizing a rubber blend consisting of rubber, a raw silicon rubber, a specified non-trackifier, a vulcanizing agent and a filler. CONSTITUTION:1-50pts.wt. at least one non-tackifier selected from fatty amides, fatty acid glycerides and compds. of the formula [wherein X is O, S; R is alkylene which may have a (thio)ether linkage; R' is H, a 1-12C alkyl; n is 1, 2], 0.1-10pts.wt. vulcanizing agent such as tetramethylthiuram disulfide and 10- 200pts.wt. filler such as carbon black, are blended with 100pts.wt. rubber mixture consisting of 98-80wt% natural rubber and/or org. synthetic rubber such as isoprene rubber and 2-20wt% raw silicon rubber having an MW of 100,000- 1,000,000 to obtain a rubber blend, which is then vulcanized at 130-170 deg.C for 10-60min.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rubber composition, in particular a rubber composition forming a non-tacky vulcanized rubber, and having a surface layer consisting of at least such a rubber composition, and thus particularly suitable for use in oil sands. 1lll of highly sticky substances like! The present invention relates to a conveyor belt that can be suitably used for Furthermore, the present invention particularly relates to a method for conveying sticky substances such as oil sands by means of a heald having a surface layer of vulcanized rubber consisting of a rubber composition as described above.

Oil sands are a petroleum resource that is particularly abundant in Canada and Venezuela, and Canada's Athabasca oil sands are particularly famous because they contain about 1/3 of the world's reserves. Take the Athabasca oil sands as an example.
This is formed by a thin water film covering fine silica sand grains, which is further surrounded by bitumen, and the water film also contains trace amounts of metals. Since this oil sant generally contains 5 to 20% by weight of heavy, viscous biticomene, it is also collected commercially as a petroleum resource. Collection methods include so-called open-pit mining and a method in which unnecessary components such as visumen and silica sand are separated underground and collected, but in Athabas, open-pit mining is used to remove overharden from the oil sand and directly collect the oil sand. The collected oil sands are then transported by belt to an extraction and purification plant.

Conventionally, belts for transporting oil sand have been made of a mixture of natural rubber and styrene/-butadiene rubber, or rubber belts made of acrylic 11 nitrile-butadiene rubber reinforced with steel cords. Conventionally, comparatively inexpensive petroleum distillates such as molten oil and light oil were sprayed onto the heald to avoid the accumulation of nitrates, which not only polluted the heald but also reduced its carrying capacity. This is transported to the extraction and purification plant while preventing the adhesion of

However, this method poses a risk of fire, accelerates the deterioration of the conveyor belt, and causes an increase in the amount of collected ml. Furthermore, the Athabas power is 15 in winter.
Since the temperature drops to around 0° C., the conveyor belt used here is required to have excellent low-temperature properties, especially flexibility at low temperatures.

Conventionally, in order to impart non-adhesive properties to organic rubber, silicone,
It is already known to blend and vulcanize raw rubber, but this method reduces the critical surface tension (hereinafter referred to as γC) of the vulcanized rubber to make the surface non-adhesive. It gives gender.

Here, γC is a concept proposed by Zisman, and since there is an almost linear relationship between the cosine of the contact angle θ of various liquids with respect to a certain polymer solid and the surface tension of those liquids, cos θ can be expressed as It is a physical constant obtained by extrapolating to 1. Simply put, it means the adhesive force between a polymer solid and a liquid, and is approximately proportional to the cohesive energy of the polymer solid.

Therefore, it is generally expected that if the γC is increased, the viscosity of the vulcanized rubber will be increased. The inventors have discovered that the non-stick properties of vulcanized rubber can be synergistically improved by blending these additives with silicone raw rubber into organic rubber and vulcanizing the mixture, leading to the present invention. In particular, as a result of extensive research into vulcanized rubber that has surface non-stick properties against oil sand, the inventors have found that by blending certain additives as non-tackifiers with silicone raw rubber, The present invention was based on the discovery that surface non-adhesion to bitumen can be achieved.

That is, the present invention generally provides a rubber composition that provides a non-tacky vulcanized rubber, and a conveyor belt with a non-tacky surface having a surface layer comprising the vulcanized rubber of the rubber composition. In particular, it is an object of the present invention to provide a conveyor belt capable of transporting the above-mentioned viscous oil sand substantially without adhesion thereto. A further object of the present invention is to provide a method for conveying viscous oil sand using a conveyor belt as described above without substantially adhering it to the belt surface.

The rubber composition according to the present invention contains 98 to 80% by weight of natural rubber and/or organic synthetic rubber and a molecular weight of 10,000 (+,
A rubber mixture consisting of 2 to 20% by weight of silicone raw rubber of +000000 and the following group (al fatty acid amide, [bl fatty acid glyceride, fcl general formula% formula% (where, or an alkylene group which may have a thioether bond, P'' represents hydrogen or an alkyl group having 1 to 12 carbon atoms, and n represents an integer of 1 or 2. It is characterized by containing 1 to 50 parts by weight of at least one non-tackifying agent selected from hydric thioalcohols and monoalkyl ethers thereof.

Organic synthetic rubbers preferably used in the present invention include isoprene rubber, styrene-butadiene-fum, acrylonitrile-butadiene rubber, butadiene rubber, and chloroprene rubber. These rubbers may be used alone, or may be a mixture of two or more. In particular, as the organic rubber, at least one selected from natural rubber, isoprene rubber, styrene-butadiene rubber, and acrylonitrile-butadiene rubber is preferred, and if necessary, butadiene rubber and chloroprene rubber are equally mixed therein.

The silicone raw rubber used in the present invention is essentially an organopolysiloxane represented by the general formula %, where R is a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, or a hexyl group. , heptyl group, nonyl group, decyl group, dodecyl group, stearyl group, valmityl group, cyclohexyl group, vinyl group, allyl group, phenyl group, naphthyl group, benzyl group, β-phenylethyl group, 2
-Phenyl ethyl group, 2-phenylpropyl group, 3-chloropropyl group, 3,3.3-1-lifluoropropyl group, 3-soanopropyl group, etc., but preferably an alkyl group, especially a methyl group and phenyl group. Also,
Usually, organoborisiloquine raw rubber has about 0.1 to 1 mol % of vinyl groups as R in the above general formula, but the silicone raw rubber used in the present invention does not need to contain vinyl groups. Therefore, in the present invention, dimethyl silicone raw rubber is particularly preferably used, but
Methylvinyl silicone raw rubber and methylphenyl raw rubber can also be used alone or together with dimethyl silicone raw rubber, if necessary. These silicone raw rubbers must have a molecular weight of LOOOOO-1000000, and if the molecular weight is less than 100000, a non-adhesive vulcanized rubber will not be obtained even when blended with the organic rubber.

The amount of silicone raw rubber blended is 98 to 80% of the above organic rubber.
2 to 20% by weight, preferably □.

The content is usually 5 to 15% by weight. When the amount of silicone raw rubber is less than 2% by weight, the vulcanized rubber has a one-minute non-stick property against sticky substances such as oil sand, while when the amount is more than 20% by weight, If this is done, processing becomes difficult and the resulting vulcanized rubber becomes inferior in strength, which is not preferred.

Next, the fatty acid amide used as the non-tackifying agent in the present invention has 6 to 30 carbon atoms, particularly 10 to 20 carbon atoms.
A higher fatty acid amide is preferred, and the higher fatty acid may be a saturated fatty acid or an unsaturated fatty acid. Therefore, preferred fatty acid amides include stearic acid amide, oleic acid amide, palmitic acid amide, lauric acid amide, and the like.

In addition, fatty acid glyceride also has 6 to 30 carbon atoms as described above.
, especially preferred are higher fatty acid glycerides of 10 to 20,
Therefore, preferred fatty acid triglycerides include stearic acid triglyceride, dihydroxystearic acid triglyceride i', oleic acid triglyceride, palmitic acid triglyceride 21, and the like. However, in the present invention, mono- and diglycerides of higher fatty acids can also be used alone or together with triglycerides, if necessary.

Another non-tackifying agent has the general formula % as described above (where X represents oxygen or sulfur, and R represents an alkylene group which may have an ether bond or thioether bond). , R' represents hydrogen or an alkyl group having 1 to 12 carbon atoms, and n represents an integer of 1 or 2). In the above general formula, preferably R' is 1 to 6, n is 1, and 1
Therefore, in the present invention, dihydric alcohols, ie, glycols, and monoalkyl ethers thereof are particularly preferably used. Therefore, preferred glycols include ethylene glycol, diethylene glycol, thiodiglycol, triethyl thiodiglycol, tetraethylene glycol, polyethylene glycol, poly(oxyethyleneoxypropylene) glycol, and monoalkyl ethers thereof. Examples include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, and the like. In addition, as a trihydric alcohol, for example, 3-methylpentane-1,3,5
-1-liol can be mentioned.

In the present invention, the rubber composition generally contains 1 to 50 parts by weight of at least one non-tackifying agent as described above, per 100 parts by weight of the rubber mixture. If the amount of anti-tackifying agent is less than 1 part by weight per 100 parts by weight of the rubber mixture, the vulcanized rubber will not have sufficient surface anti-tackiness, while if it exceeds 50 parts by weight, the rubber will In addition to making it difficult to knead uniformly, the non-adhesive property of the vulcanized rubber may bleed onto the surface, which is not preferable.

Preferably, in the present invention, when at least one selected from fatty acid amides and fatty acid glycerides is used as the non-tackifying agent, the blending amount is 100% of the rubber mixture.
1 to 20 parts by weight, particularly preferably 1 to 1
O parts by weight. In addition, when a glycol represented by the above general formula or a monoalkyl ether thereof is used as a non-tackifying agent, the amount thereof is 5 to 50 parts by weight, particularly preferably 10 to 25 parts by weight, per 100 parts by weight of the rubber mixture.
Parts by weight. When at least one selected from fatty acid amides and fatty acid glycerides and at least one selected from the above glycols and monoalkyl ethers thereof are used together, both are within the respective ranges, and 1]
It is desirable that the total amount of both of them is 50 parts by weight or less per 100 parts by weight of the rubber mixture.

Note that some glycols may not have good compatibility with rubber. In this case, it is preferable to use it together with the ether 5 or to impregnate it with silica, clay, etc. in advance and mix it into the rubber. Alternatively, glycol may be added to rubber at the same time as silica, clay, etc. and kneaded.

The rubber composition in the present invention contains an appropriate vulcanizing agent depending on the organic rubber used. When natural rubber, isoprene rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, butadiene rubber, etc. are used as the organic rubber, sulfur and/or a sulfur-containing compound is usually contained as a vulcanizing agent. Any sulfur-containing compound may be used as long as it can vulcanize the above-mentioned organic rubber, but for example, tetramethylthiuchim disulfide, tetraethylthiuchim J, disulfide and the like are preferably used. These vulcanizing agents are blended in an amount of 1 to 10 parts by weight, preferably 1 to 5 parts by weight, per 100 parts by weight of the rubber mixture. Further, a vulcanization aid may be used in combination with the vulcanizing agent.

As the vulcanization aid, those conventionally known for the above-mentioned organic rubbers can be used as appropriate.For example, as the vulcanization accelerator, 6゛ζdiphenylguanidine, dicatechol diortho]-zirguanidine salt, 2-mercaptohendithiazole, dibenzothiazyl disulfite, N-cyclohexyl-2-benzothiazyl sulfenamide, tetramethylthiuram monosulfur F, etc., and zinc white, magnesium oxide, magnesium oxide, etc. as vulcanization accelerators. Examples include metal oxides such as litharge, fatty acids such as stearic acid and oleic acid, amines such as triethanolamine and jetanolamine, and other activators such as diethylene glycol and triallyl trimellitate.

Furthermore, in the rubber composition of the present invention, an organic peroxide, platinum or a platinum compound, or an organic acid metal salt, etc., which are generally used for vulcanization of silicone raw rubber, may be blended. For example, organic peroxides include benzoyl peroxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, dicumyl peroxide, 1,1-bis(tert-butylperoxy)-3,3, 5-) Limethylcyclohexane, di-tert-butyl peroxide, 1,3-bis(tert-butyl 7-peroxyisobrobylene) Per 100 parts by weight of raw rubber, usually O. 1 to 10
Parts by weight are added.

Further, when chloroprene rubber is used as the organic rubber, zinc oxide, magnesium oxide, etc. are used as a vulcanizing agent, and an appropriate vulcanization accelerator is used in combination as necessary.

In addition to the above, the rubber composition of the present invention may contain various fillers commonly used in the organic rubbers. For example, fillers include carbon black, silica, calcium carbonate, clay, magnesium carbonate, diatomaceous earth, various silicates, and organic fillers. When blending these fillers, plasticizers such as di(2-ethylhexyl) phthalate, di(2-ethylhexyl) adipate, dibutyl phthalate, tri(2-ethyl-xyl) trimellitate, tricresyl phosphate, and paraffin are used. A softening agent such as a type process oil or a triaromatic process oil can be used in combination. Furthermore, phenyl-α-naphthylamine, N.

8 No diphenyl-p-phenylenediamine, 6-nitoxy2.2.4-1-dimethyl-1,2-dihydroquinoline, N-phenyl-No-isopropyl-p-phenylenediamine, 2-mercaptobenzimidazole,
Antiaging agents such as nickel dibutyldithiocarbamate may also be used. If necessary, scorch inhibitors, processing aids, etc. are also used in combination.

To produce the rubber composition according to the present invention, usually -■-
The recording acid components may be mixed using a Banbury mixer, a kneader mixer, a roll, or the like.

The rubber composition according to the invention is typically vulcanized by pressing at a temperature of 130-170°C for 10-60 minutes to give a vulcanized rubber.

The vulcanized rubber thus obtained has excellent non-adhesion to bitumen, and can therefore be suitably used as a surface layer for a φ conveyor belt for conveying oil sand containing bitumen.

□ The conveyor belt according to the invention therefore comprises 100 parts by weight of a rubber mixture consisting of 98 to 80 parts by weight of natural rubber and/or said organic synthetic rubber and 2 to 20 parts by weight of silicone/l rubber having a molecular weight of 100,000 to 1,000,000. and the following group Tal fatty acid amide, tb> fatty acid glyceride, (C1 general formula % formula % (however, X represents oxygen or sulfur, R represents an alkylene group which may have an ether bond or a thousand-onethyl bond , R' represents hydrogen or an alkyl group having 1 to 12 carbon atoms, and n represents an integer of 1 or 2. 1 to 50 parts by weight of one type of non-tackifier and 0.0 parts by weight of a vulcanizing agent.
It is characterized by having, as at least its surface layer, a vulcanized rubber obtained by vulcanizing a rubber compound containing 1 to 10 parts by weight of a filler and 10 to 200 parts by weight of a filler.

The organic rubber for the conveyor belt is preferably at least one selected from natural rubber, isoprene rubber, styrene-butadiene rubber, and acrylonitrile-butadiene rubber, and as the filler, among the above-mentioned ones,
In particular, carbon black is particularly attractive, and if a vulcanized rubber obtained by vulcanizing a rubber composition containing carbon black is used as at least the surface layer, it is reinforced in the longitudinal direction with metal, organic fiber cord, canvas, etc. The conveyor belt according to the present invention not only has excellent non-adhesion to the oil container 1', but also has excellent oil resistance, flexibility, and low-temperature properties, and is therefore suitable for use as a conveyor belt for conveying oil sand. especially,
The amount of Carposi Black suitable for conveyor helds for conveying oil sands is 20 to 150 parts by weight, preferably 30 to 100 parts by weight, per 100 parts by weight of the above rubber mixture.

Therefore, the preferred oil sand conveyor heald according to the present invention is made of natural rubber and/or the organic synthetic rubber 9.
100 parts by weight of a rubber mixture consisting of 8 to 80% by weight and 2 to 20% by weight of silicone raw rubber having a molecular weight of 10QOOO-1 1,000,000, and the following group (al fatty acid amide, (b) fatty acid glyceride, (C) general formula % formula % (However, X represents oxygen or sulfur, ln represents an alkylene group that may have an ether bond or thioether bond, R" represents hydrogen or an alkyl group having 1 to 12 carbon atoms, and n 1 to 50 parts by weight of at least one non-tackifying agent selected from polyhydric alcohols, polyhydric thioalcohols, and monoalkyl ethers thereof represented by (or an integer of 2), and sulfur as a vulcanizing agent. and/or having as at least its surface layer a vulcanized rubber obtained by vulcanizing a rubber compound containing 1 to 5 parts by weight of a sulfur-containing organic compound and 20 to 150 parts by weight of carbon black as a filler. It is characterized by

゛22 In particular, organic rubber with an acrylonitrile content of 15 to 2
Acrylonitrile bucdiene rubber in the range of 5% by weight is preferably used because it has an excellent balance between cold resistance and oil resistance.

However, it is needless to say that the above rubber compound may contain butadiene rubber, chloroprene rubber, etc., a vulcanizing agent, a vulcanization accelerator, or other fillers therefor.

The method of manufacturing a conveyor belt is already generally well known, and includes a vulcanized rubber made by vulcanizing the above-mentioned rubber compound as at least the surface layer, and a reinforcing cord such as a steel cord, an organic fiber cord, or a reinforcing cord. Furthermore, a conveyor belt having canvas or the like as a reinforcing material in one direction is substantially non-adhesive to viscous oil sand.

Therefore, according to the present invention, there is also provided a method for transporting collected oil sands to a predetermined extraction and purification plant, which method includes natural rubber and/or the organic synthetic rubber,
Preferably, at least one organic rubber selected from natural rubber, isoprene rubber, styrene-butadiene rubber, and lylonitrile-butadiene rubber has a molecular weight of 98 to 80% and a molecular weight of 1,110,000%.
0-1000000 silicone raw rubber 2-20% by weight
100 parts by weight of a rubber mixture consisting of the following group (a) fatty acid amide, Tbl fatty acid glyceride, (C1 general formula % formula % (However, X represents oxygen or sulfur, R has an ether bond or thioether bond) R' represents hydrogen or an alkyl group having 1 to 12 carbon atoms, and n represents an integer of 1 or 2. 1 to 50 parts by weight of at least one non-tackifying agent selected from monoalkyl ethers, 1 to 5 parts by weight of sulfur and/or sulfur-containing organic compound as a vulcanizing agent, and 20 to 150 parts of carbon Bragg as a filler. The oil sand is conveyed by a conveyor belt having, as at least its surface layer, a vulcanized rubber obtained by vulcanizing a rubber compound containing an overlapping part.

Therefore, according to this method, the oil sand can be transported from the collection point to the extraction and purification plant without spraying molten oil or the like on the surface of the heald, and without substantially adhering the oil sand to the surface.
f can be done. However, since the conveyor belt of the present invention has excellent oil resistance, there is no problem in spraying melted oil or the like on its surface as necessary.

Examples of the present invention are listed below, but the present invention is not limited to these Examples. Note that in the following, parts indicate parts by weight.

Example The rubber shown in the table below and the dimethyl silicone crude rubber having a molecular weight of about 500,000 were mixed in the proportion shown in the table, and after kneading them uniformly with two rolls, the rubber mixture was mixed with the non-tackifying agent shown in the table, 60 parts of carbon black, 5 parts of zinc white, 2 parts of sulfur, 1 part of vulcanization accelerator, 3 parts of processing aid, 3 parts of anti-aging agent and 1 part of stearic acid were mixed and heated at a temperature of 80 to 100°C. The mixture was uniformly kneaded using a single roll, and then rolled using a roll to obtain a sheet having a thickness of 2 fins. The asphalt peel strength of the vulcanized rubber sheet thus obtained is shown in the table. still,
rc is not listed in the table because it fluctuates greatly due to measurement.

For comparison, a sheet obtained by blending only silicone raw rubber with rubber, a sheet obtained in the same manner without blending either silicone raw rubber or a non-tackifying agent, that is, a conventional vulcanized rubber sheet with through holes, and Similarly, the γC and asphalt peeling force of the vulcanized silicone rubber sheet are shown in the table.

From the results of 1- above, according to the present invention, by blending a small amount of silicone raw rubber and a specific non-tackifying agent with organic rubber and vulcanizing it, compared to the case where silicone raw rubber is blended alone, The amount of non-tackifier increases, resulting in a γC and asphalt peeling force close to that of vulcanized silicone rubber.

The method for measuring γC is as follows. That is, using glycerin, formamide, thiodiglycol, ethylene glycol, and polyethylene glycol (average molecular weight 200) as liquids with known surface tensions, the contact angle θ on vulcanized rubber at a temperature of 25° C. was measured, and cos θ was extrapolated to 1 to obtain γC.

The method for measuring asphalt peeling force is as follows. High-quality paper with a thickness of 0.08 m is impregnated with asphalt with a penetration of 200 under pressure at a rate of 0.01 g/cJ, and a width of 1 cm is made.
11. The above rubber sheet cut to a length of 10 cm was pressed for 10 seconds at a temperature of 25 degrees under a pressure of 3 kg/-, and then the 180 degree peel force was measured at a peel rate of 50 w5/min.

[Brief explanation of the drawing]

Figure 1 is a graph showing the relationship between the amount of silicone raw rubber compounded in the vulcanized rubber obtained by blending silicone raw rubber with acrylonitrile-butadiene rubber and Iasphald peeling force. It is a graph showing the relationship between critical surface tension (γC) and asphalt peeling force showing the effect of silicone raw rubber blending and asphalt peeling force in a vulcanized rubber obtained by blending silicone raw rubber and vulcanizing it. 8 Procedural amendment (formality) September 3, 1980 Commissioner of the Patent Office 1. Indication of the case 1982 Patent Application No. 082798 2. Name of the invention Rubber composition 3. Relationship of the person making the amendment to the case Patent applicant address: 3-2-15 Meiwa-dori, Hyogo-ku, Kobe Name:
Band Kagaku Co., Ltd. 4, agent address: 1-8 #r3-5, Shinmachi, Nishi-ku, Osaka City, and the date of the amendment order: August 13, 1981. Submit the application and specification (no changes to the contents).

Claims (1)

[Claims] fll Natural rubber and/or organic synthetic rubber 98-80
A rubber mixture consisting of 2 to 20% by weight of silicone raw rubber with a molecular weight of 1 ooooo or toooo, and the following group (a) fatty acid amide, (bl fatty acid glyceride, (C1 general formula % formula % (where X is oxygen or sulfur, R represents an alkylene group which may have an ether bond or thioether bond, R' represents hydrogen or an alkyl group having 1 to 12 carbon atoms, and n represents an integer of 1 or 2.) A rubber composition characterized by containing 1 to 50 parts by weight of at least one non-tackifying agent selected from polyhydric alcohols, polyhydric thioalcohols, and monoalkyl ethers thereof represented by (2) ) The rubber mixture contains 1 to 20 parts by weight of fatty acid amide and/or fatty acid glyceride.
- The rubber composition according to claim 1. (3) The rubber composition according to claim 1, wherein the rubber mixture contains 5 to 50 parts by weight of a polyhydric alcohol, a polyhydric thioalcohol, and a monoalkyl ether thereof. (4) Natural rubber and/or organic synthetic rubber 98-8
(A rubber mixture consisting of 1% by weight and 2 to 20% by weight of silicone raw rubber with a molecular weight of 100,000 to 1,000,000, However, X represents oxygen or sulfur, R represents an alkylene group which may have an ether bond or thioether bond, R" represents hydrogen or an alkyl group having 1 to 12 carbon atoms, and n is 1 or 2. 1 to 50 parts of at least one non-tackifying agent selected from polyhydric alcohols, polyhydric thioalcohols, and monoalkyl ethers thereof represented by (indicates an integer of ) and 0.0 parts of a vulcanizing agent.
1. A conveyor belt for transporting oil sand, characterized in that it has at least a surface layer of vulcanized rubber obtained by vulcanizing a rubber compound containing 1 to 10 parts by weight of a filler and 10 to 200 parts by weight of a filler. (5) 98 to 80% by weight of at least one organic rubber selected from natural rubber, isoprene rubber, styrene-butadiene rubber, and acrylonitrile-butadiene rubber and silicone raw rubber with a molecular weight of 100,000 to 1,000,000 2
A rubber mixture consisting of ~20% by weight and group F (al fatty acid amide, fbl fatty acid glyceride, (C1 general formula % formula % (where, (Ro represents hydrogen or an alkyl group having 1 to 12 carbon atoms, and n represents an integer of 1 or 2.) 1 to 50 M parts of at least one non-tackifying agent selected from monoalkyl ethers, 0.1 to 10 parts by weight of sulfur and/or sulfur-containing compound as a vulcanizing agent, and Carpump 9F210 as a filler. The conveyor belt for oil sand 1ltll according to claim 4, characterized in that it has a vulcanized rubber formed by vulcanizing a rubber compound containing 200 parts by weight as at least its surface layer. ) The conveyor belt for oil sand transportation according to claim 4 or 5, characterized in that the rubber mixture contains 1 to 20 parts by weight of fatty acid amide and/or fatty acid glyceride. The conveyor belt for transporting oil containers according to claim 4 or 5, characterized in that it contains 5 to 50 parts by weight of a hydrohydric alcohol, a polyhydric thioalcohol, and a monoalkyl ether thereof.