CN111286096A - White covering glue composition for transporting animal and plant products and preparation method thereof - Google Patents
White covering glue composition for transporting animal and plant products and preparation method thereof Download PDFInfo
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- CN111286096A CN111286096A CN202010244934.5A CN202010244934A CN111286096A CN 111286096 A CN111286096 A CN 111286096A CN 202010244934 A CN202010244934 A CN 202010244934A CN 111286096 A CN111286096 A CN 111286096A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/06—Copolymers with styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a white cover rubber composition for transporting animal and plant products, which is prepared from the following raw materials, by weight, 50-70 parts of nitrile rubber, 30-50 parts of styrene butadiene rubber, 3-5 parts of zinc oxide, 0-1.5 parts of stearic acid, 2-4 parts of an anti-aging agent, 5-10 parts of tackifying resin, 3-5 parts of an auxiliary agent, 30-60 parts of a white reinforcing agent, 10-20 parts of a plasticizer and 3-5 parts of a vulcanization system.
Description
Technical Field
The invention belongs to the technical field of rubber materials, and particularly relates to a white covering rubber composition for transporting animal and plant products and a preparation method thereof.
Background
The essence of the belt is a belt that transfers power from the power source to the equipment through the mechanical linkage, allowing the equipment to operate. The transmission belt has the excellent performances of free speed change, low price and convenient replacement, so the transmission belt plays an important role in the current mechanical transmission parts, and the quality of the transmission belt material directly influences the running of mechanical equipment and the quality of produced parts. The development of drive belt materials has gone through a series of stages, from initial natural rubber to synthetic rubber, now in the direction of specialty synthetic rubbers. The power source transmits the power to the mechanical equipment by means of the friction force between the rubber transmission belt and the mechanical structure, but after the equipment runs for a long time, the rubber transmission belt is inevitably worn under the action of the friction force, and in addition, a large amount of heat is generated, which seriously affect the quality and the performance of the transmission belt.
With the rapid development of the current mechanical industry, particularly some emerging industries, the requirements on the performance of the transmission belt material are becoming more and more demanding. For example, most of the conveying belts in the prior art are black and mineral oil-resistant, and are mainly used for conveying mineral products and the like, so the black conveying belts in the prior art cannot meet the requirement of conveying food raw materials such as animal and plant products, and the food raw materials contain more grease, so the materials used by the existing conveying belts easily pollute the conveyed products according to the principle of similarity and compatibility. This is a problem to be solved after the use field of the conveyor belt is expanded.
Disclosure of Invention
In order to overcome the defects of the prior art, the white cover rubber composition for transporting animal and plant products and the preparation method thereof are provided, and the following technical scheme is adopted specifically:
the first aspect of the invention provides a white cover rubber composition for transporting animal and plant products, which is prepared from the following raw materials, by weight, 50-70 parts of nitrile rubber, 30-50 parts of styrene butadiene rubber, 3-5 parts of zinc oxide, 0-1.5 parts of stearic acid, 2-4 parts of an anti-aging agent, 5-10 parts of tackifying resin, 3-5 parts of an auxiliary agent, 30-60 parts of a white reinforcing agent, 10-20 parts of a plasticizer and 3-5 parts of a vulcanization system;
further, the white cover rubber composition for transporting animal and plant products is prepared from the following raw materials, by weight, 60 parts of nitrile rubber, 40 parts of styrene butadiene rubber, 4 parts of zinc oxide, 1 part of stearic acid, 3 parts of an anti-aging agent, 8 parts of tackifying resin, 4 parts of an auxiliary agent, 45 parts of a white reinforcing agent, 15 parts of a plasticizer and 4 parts of a vulcanization system;
further, the mass fraction of acrylonitrile contained in the nitrile rubber is 31-35%;
further, the styrene-butadiene rubber is emulsion polymerization styrene-butadiene rubber;
further, the anti-aging agent is any one or more of anti-aging agents MB, RD and 2246; preferably, the anti-aging agent consists of an anti-aging agent MB and an anti-aging agent RD, and the mass ratio of the anti-aging agent MB to the anti-aging agent RD is 1: 1;
further, the tackifying resin is a carbon-nine petroleum resin;
further, the auxiliary agent is PEG 4000;
further, the white reinforcing agent is composed of white carbon black, kaolin and silicate, and the mass ratio of the white carbon black to the kaolin to the silicate is 2: 1: 1;
further, the plasticizer is dioctyl terephthalate;
further, the vulcanization system consists of insoluble sulfur, an accelerator DM and an accelerator TMTD, and the mass ratio of the insoluble sulfur to the accelerator DM to the accelerator TMTD is 5: 3: 1.
the invention also provides a preparation method of the white transportation animal and plant product covering glue composition, which comprises the following steps:
putting nitrile rubber and styrene butadiene rubber into an internal mixer, plasticating for 20-30 seconds, heating to 30-60 ℃, adding zinc oxide, stearic acid, an anti-aging agent and tackifying resin, mixing for 20-30 seconds, heating to 60-90 ℃, then adding a white reinforcing agent and an auxiliary agent into the system for reaction, heating to 100-110 ℃, adding a plasticizer, mixing for 20-40 seconds, heating to 130-150 ℃, and discharging to obtain a first rubber material; standing the first rubber material for more than 4 hours, adding a vulcanization system into an internal mixer, mixing for 70-80 seconds, heating to 80-100 ℃, discharging to obtain a second rubber material, uniformly stirring the second rubber material on an open mill, and cooling to obtain the second rubber material.
The nitrile rubber is prepared from butadiene and acrylonitrile by an emulsion polymerization method, is mainly produced by a low-temperature emulsion polymerization method, and has the advantages of excellent oil resistance, higher wear resistance, better heat resistance and strong bonding force. The nitrile rubber is mainly used for manufacturing oil-resistant rubber products. NBR, a synthetic rubber made by copolymerizing butadiene and acrylonitrile. The rubber is a synthetic rubber with better oil resistance (especially alkane oil) and aging resistance. It can be used in 120 deg.C air or 150 deg.C oil for a long period. In addition, it has excellent water resistance, air tightness and excellent adhesion performance.
Styrene butadiene rubber, abbreviated as SBR, is also called polystyrene butadiene copolymer. The physical and mechanical properties, the processing property and the use property of the product are close to those of natural rubber, and some properties such as wear resistance, heat resistance, aging resistance and vulcanization speed are better than those of the natural rubber, so that the rubber can be used together with the natural rubber and various synthetic rubbers.
Stearic acid, i.e. octadecanoic acid, formula C18H36O2Produced by hydrolysis of fats and oils, mainly used for producing stearate, dissolved in 21ml of ethanol, 5ml of benzene, 2ml of chloroform or 6ml of carbon tetrachloride per gram.
Polyethylene glycol 4000(PEG-4000), polyethylene glycol series products are non-toxic, nonirritating, slightly bitter in taste, good in water solubility, and good in compatibility with a plurality of organic matter components. They have excellent lubricity, moisture retention, dispersibility, adhesives, antistatic agents, softeners and the like, and are widely applied in the industries of cosmetics, pharmacy, chemical fibers, rubber, plastics, papermaking, paint, electroplating, pesticides, metal processing, food processing and the like.
White carbon black is a general term for white powdery X-ray amorphous silicic acid and silicate products, mainly referring to precipitated silica, fumed silica and ultrafine silica gel, and also including powdery synthetic aluminum silicate, calcium silicate, and the like. The white carbon black is porous material, and its composition can be SiO2·nH2O represents, wherein nH2O is present in the form of surface hydroxyl groups. It is soluble in caustic alkali and hydrofluoric acid, and insoluble in water, solvent and acid (except hydrofluoric acid). Has the advantages of high temperature resistance, non-combustion, tastelessness, no smell and good electrical insulation. The white carbon black is used in color rubber products to replace carbon black for reinforcement, and meets the requirements of white or semitransparent products. The white carbon black has super strong adhesive force, tear resistance, heat resistance and ageing resistance, so that part of carbon black can be replaced in black rubber products to obtain high-quality rubber products, such as off-road tires, engineering tires, radial tires and the like.
Antioxidant MB, named 2-mercaptobenzimidazole in Chinese, with molecular formula of C7H6N2S, white crystalline powder. The natural plant extract is nontoxic and bitter, has a relative density of 1.40-1.44, a melting point of not less than 300 ℃, can be dissolved in ethanol, acetone and ethyl acetate, is insoluble in petroleum ether and dichloromethane, and is insoluble in carbon tetrachloride, benzene and water. It can be used as antioxidant for natural rubber, diene synthetic rubber and latex, and can also be used for polyethylene. It is a so-called secondary antioxidant, and can be used together with other antioxidants (such as DNP, AP and other non-polluting antioxidants) to obtainObvious synergistic effect. The product is easily dispersed in rubber, and does not change color under sunlight. Slightly polluting.
Anti-aging agent 2246, white powder, chinese name 2, 2' -methylenebis- (4-methyl-6-tert-butylphenol); molecular weight 340.5, molecular formula: c23H32O2Melting point: 123 to 127, and a density of 1.04g/cm3The rubber is easily soluble in organic solvents such as benzene and acetone, is insoluble in water, has the solubility in rubber higher than 2 percent, and is widely applied to various synthetic materials such as natural rubber, various synthetic rubbers, polyethylene, polypropylene, polyformaldehyde, ABS resin, chlorinated polyether, polyurethane and the like.
The anti-aging agent RD has the molecular formula of C12H17N and the molecular weight of 175.2701, is mainly used as a rubber anti-aging agent and is suitable for natural rubber and synthetic rubber such as butyronitrile, butylbenzene, ethylene propylene, chloroprene rubber and the like.
The carbon-nine petroleum resin is the by-product C of petroleum cracking9The fraction, which is a thermoplastic resin produced by pretreatment, polymerization, distillation, etc., is not a high polymer, but an oligomer having a molecular weight of 300-3000. The carbon-nine petroleum resin has the characteristics of low acid value, good miscibility, water resistance, ethanol resistance, chemical resistance and the like, is chemically stable to acid and alkali, and has the characteristics of viscosity regulation and good thermal stability. The carbon-nine petroleum resin can not only increase the adhesive force between rubber particles, but also improve the adhesive force between the rubber particles and the cord.
Dioctyl terephthalate, abbreviated as DOTP, molecular formula: c24H38O4. The dioctyl terephthalate has the advantages of outstanding electrical resistance, heat resistance, cold resistance, low-temperature volatility, low glass transition temperature, extraction resistance, flexibility, low volatility, good electrical insulation performance and the like, and can be used as a plasticizer for synthetic rubber.
Insoluble sulfur: insoluble sulfur is elastic sulfur having a transparent, amorphous chain structure obtained by heating sulfur powder to boiling (444.6 ℃ C.) and quenching the sulfur powder in cold water. Or diluting the superheated sulfur vapor with inert gas, spraying into cold water mist, cooling to below 90 deg.C, or dissolving sulfur block in ammonia, and spray drying. Most (65-95%) of the sulfur is insoluble in carbon disulfide, so the sulfur is called insoluble sulfur. Because it is insoluble in rubber, it is not easy to produce early vulcanization and sulfur spraying phenomena in the rubber material, and has no damage to the adhesive property of the rubber material, so that it can eliminate the slurry coating process, save gasoline and clean environment. At the vulcanization temperature, the insoluble sulfur is converted to the usual sulfur to exert its vulcanization effect on the rubber. Typically for articles of particular interest such as steel wire tires and the like. Insoluble sulfur is added into the rubber product, so that the problems of separation of sulfur and pollution and color change of the rubber product in the use process of the conveyor belt can be effectively solved.
The accelerator DM is light yellow powder, bitter in taste, nontoxic and stable in storage. The vulcanization critical temperature of the accelerator TMTD is 130 ℃, the activity is increased at the temperature of more than 140 ℃, the post-effect is better, and the vulcanization operation is safe. Promoter TMTD is used in combination with promoter DM to increase its activity.
Has the advantages that:
1. the dosage of the nitrile rubber, the styrene butadiene rubber, the plasticizer, the white reinforcing agent, the auxiliary agent and other components is reasonably designed, and the preparation temperature and time are accurately controlled, so that the formula disclosed by the invention has good oil resistance and ageing resistance;
2. PEG4000 is added as an auxiliary agent, so that the extrusion speed of the rubber material can be obviously increased, the demoulding property is improved, the surface of a product is bright, and the water discharge during vulcanization is facilitated; in addition, as a vulcanization activator, the rubber composition has the effects of regulating the bonding performance of the raw rubber and the filler (such as white carbon black and kaolin), reducing the Mooney property and improving the vulcanization rate; in addition, the carbon white is matched with the carbon white to wet the acid surface of the carbon white, has the functions of neutralization and covering, and reduces the adsorption effect of the carbon white on the accelerant so as to promote the continuous reaction; meanwhile, in the preparation of non-black rubber products, the physical and mechanical properties of the rubber products can be improved, and the products have bright colors.
3. The conveyor belt covering glue obtained by the formula and the preparation method can be used for a long time without color change, and can prevent pollution to conveyed products.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Example 1
A white transportation animal and plant product covering rubber composition is prepared from the following raw materials, by weight, 50 parts of nitrile rubber (wherein the mass fraction of acrylonitrile-containing rubber is 31%), 50 parts of emulsion polymerization styrene-butadiene rubber, 3 parts of zinc oxide, 2 parts of an anti-aging agent (consisting of 1 part of an anti-aging agent MB and 1 part of an anti-aging agent 2246), 5 parts of carbonine petroleum resin, 03 parts of PEG-40003, 30 parts of white reinforcing agent (consisting of 15 parts of white carbon black, 7.5 parts of kaolin and 7.5 parts of silicate), 10 parts of dioctyl phthalate and 3 parts of a vulcanization system (consisting of 1.67 parts of insoluble sulfur, 1.0 part of an accelerator DM and 0.33 part of an accelerator TMTD); the preparation method of the covering glue composition comprises the following steps:
putting nitrile rubber and emulsion polymerized styrene butadiene rubber into an internal mixer, plasticating for 30 seconds, heating to 60 ℃, adding zinc oxide, an anti-aging agent and carbon-nine petroleum resin, mixing for 30 seconds, heating to 90 ℃, then adding a white reinforcing agent and an auxiliary agent PEG-4000 into the system, reacting, heating to 110 ℃, adding a plasticizer dioctyl phthalate, mixing for 40 seconds, heating to 150 ℃, and discharging to obtain a first rubber material; standing the first rubber material for more than 4 hours, adding a vulcanization system into an internal mixer, mixing for 80 seconds, heating to 100 ℃, discharging to obtain a second rubber material, uniformly stirring the second rubber material on an open mill, and cooling and discharging to obtain the rubber material.
Example 2
A white transportation animal and plant product covering rubber composition is prepared from the following raw materials, by weight, 70 parts of nitrile rubber (wherein the mass fraction of acrylonitrile-containing rubber is 35%), 30 parts of emulsion polymerization styrene-butadiene rubber, 5 parts of zinc oxide, 1.5 parts of stearic acid, 4 parts of an anti-aging agent (consisting of 2 parts of an anti-aging agent MB and 2 parts of an anti-aging agent RD), 10 parts of carbonine petroleum resin, 05 parts of PEG-40005 parts of white reinforcing agent 60 parts (consisting of 30 parts of white carbon black, 15 parts of kaolin and 15 parts of silicate), 20 parts of dioctyl phthalate and 5 parts of a vulcanization system (consisting of 2.78 parts of insoluble sulfur, 1.67 parts of an accelerator DM and 0.55 part of an accelerator TMTD); the preparation method of the covering glue composition comprises the following steps:
putting nitrile rubber and emulsion polymerized styrene butadiene rubber into an internal mixer, plasticating for 20 seconds, heating to 30 ℃, adding zinc oxide, stearic acid, an anti-aging agent and carbon-nine petroleum resin, mixing for 20 seconds, heating to 60 ℃, then adding a white reinforcing agent and an auxiliary agent PEG-4000 into the system, reacting, heating to 100 ℃, adding a plasticizer dioctyl phthalate, mixing for 20 seconds, heating to 130 ℃, and discharging to obtain a first rubber material; standing the first rubber material for more than 4 hours, adding a vulcanization system into an internal mixer, mixing for 70 seconds, heating to 80 ℃, discharging to obtain a second rubber material, uniformly stirring the second rubber material on an open mill, and cooling and discharging to obtain the rubber material.
Example 3
A white transportation animal and plant product covering rubber composition is prepared from the following raw materials, by weight, 60 parts of nitrile rubber (wherein the mass fraction of acrylonitrile is 33%), 40 parts of emulsion polymerization styrene butadiene rubber, 4 parts of zinc oxide, 1.0 part of stearic acid, 3.0 parts of an anti-aging agent (consisting of 2.25 parts of anti-aging agent MB and 0.75 part of anti-aging agent RD), 8 parts of carbonine petroleum resin, 8 parts of PEG-40004 parts of white reinforcing agent 45 parts (consisting of 22.5 parts of white carbon black, 11.25 parts of kaolin and 11.25 parts of silicate), 15 parts of dioctyl phthalate and 4 parts of a vulcanization system (consisting of 2.23 parts of insoluble sulfur, 1.33 parts of accelerator DM and 0.44 parts of accelerator TMTD); the preparation method of the covering glue composition comprises the following steps:
putting nitrile rubber and emulsion polymerized styrene butadiene rubber into an internal mixer, plasticating for 25 seconds, heating to 40 ℃, adding zinc oxide, stearic acid, an anti-aging agent and carbon-nine petroleum resin, mixing for 25 seconds, heating to 70 ℃, then adding a white reinforcing agent and an auxiliary agent PEG-4000 into the system, reacting, heating to 105 ℃, adding a plasticizer dioctyl phthalate, mixing for 30 seconds, heating to 140 ℃, and discharging to obtain a first rubber material; standing the first rubber material for more than 4 hours, adding a vulcanization system into an internal mixer, mixing for 75 seconds, heating to 90 ℃, discharging to obtain a second rubber material, uniformly stirring the second rubber material on an open mill, and cooling and discharging to obtain the rubber material.
Comparative example 4
A white transportation animal and plant product covering rubber composition is prepared from the following raw materials, by weight, 60 parts of nitrile rubber (wherein the mass fraction of acrylonitrile is 33%), 40 parts of emulsion polymerization styrene butadiene rubber, 4 parts of zinc oxide, 1.0 part of stearic acid, 3.0 parts of an anti-aging agent (consisting of 2.25 parts of anti-aging agent MB and 0.75 part of anti-aging agent RD), 8 parts of carbonine petroleum resin, 45 parts of a white reinforcing agent (consisting of 22.5 parts of white carbon black, 11.25 parts of kaolin and 11.25 parts of silicate), 15 parts of dioctyl phthalate and 4 parts of a vulcanization system (consisting of 2.23 parts of insoluble sulfur, 1.33 parts of accelerator DM and 0.44 part of accelerator TMTD); the preparation method of the covering glue composition comprises the following steps:
putting nitrile rubber and emulsion polymerized styrene butadiene rubber into an internal mixer, plasticating for 25 seconds, heating to 40 ℃, adding zinc oxide, stearic acid, an anti-aging agent and carbon-nine petroleum resin, mixing for 35 seconds, heating to 70 ℃, then adding a white reinforcing agent into the system, reacting, heating to 110 ℃, adding a plasticizer dioctyl phthalate, mixing for 40 seconds, heating to 135 ℃, and discharging to obtain a first rubber material; standing the first rubber material for more than 4 hours, adding a vulcanization system into an internal mixer, mixing for 90 seconds, heating to 90 ℃, discharging to obtain a second rubber material, uniformly stirring the second rubber material on an open mill, and cooling and discharging to obtain the rubber material.
Therefore, compared with the comparative example 4, the vulcanization rate of the example 3 is obviously improved, the crosslinking density is improved, the physical and mechanical strength is better, the time for preparing the obtained rubber is shorter, and the preparation efficiency is higher.
Experimental example 1: color change experiment
Two of the rubbers prepared in examples 1 to 3 were used as test samples 1#～3#And comparative sample 4#～6#Test specimen 1#～3#Aging test was conducted by heating at a high temperature of 70 ℃ and comparative sample 4#～6#Sealing and storing at normal temperature, and after 168 hours, respectively storing the experimental samples 1#～3#And comparative sample 4#～6#Comparative observation was carried out to find an experimental sample 1#～3#Color and contrast sample 4#～6#The color is not different, which shows that the rubber obtained in the examples 1 to 3 can be used for a long time without color change at normal temperature.
Experimental example 2: performance testing
The index of the rubber conveyer belt cap rubber performance prepared by the example 3 and the comparative example 4 is shown in the table 1:
TABLE 1
It should be noted that the selected drugs for clinical research of the present invention are the representative formulations of the present invention and the drugs obtained by the preparation method thereof, and the other formulations and the drugs obtained by the preparation method thereof involved in the present invention are not exhaustive due to space limitations, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The white covering rubber composition for the transportation of animal and plant products is characterized by being prepared from the following raw materials, by weight, 50-70 parts of nitrile rubber, 30-50 parts of styrene butadiene rubber, 3-5 parts of zinc oxide, 0-1.5 parts of stearic acid, 2-4 parts of an anti-aging agent, 5-10 parts of tackifying resin, 3-5 parts of an auxiliary agent, 30-60 parts of a white reinforcing agent, 10-20 parts of a plasticizer and 3-5 parts of a vulcanization system.
2. The white transportation animal and plant product covering rubber composition as claimed in claim 1, wherein the white transportation animal and plant product covering rubber composition is prepared from the following raw materials, by weight, 60 parts of nitrile rubber, 40 parts of styrene butadiene rubber, 4 parts of zinc oxide, 1 part of stearic acid, 3 parts of anti-aging agent, 8 parts of tackifying resin, 4 parts of auxiliary agent, 45 parts of white reinforcing agent, 15 parts of plasticizer and 4 parts of vulcanization system.
3. The white transportation animal and plant product covering rubber composition as defined in claim 1 or 2, wherein the acrylonitrile-butadiene rubber contains 31-35% by mass of acrylonitrile.
4. The white transportation animal and vegetable product cover rubber composition according to claim 1 or 2, wherein the styrene-butadiene rubber is emulsion polymerized styrene-butadiene rubber.
5. The white cover rubber composition for transportation animal and plant products as claimed in claim 1 or 2, wherein the antioxidant is any one or more of antioxidants MB, RD and 2246.
6. The white transportation animal and vegetable product cover glue composition according to claim 1 or 2, characterized in that said tackifying resin is a carbonine petroleum resin.
7. The white shipping animal and vegetable product mulch composition according to claim 1 or 2 wherein the adjuvant is PEG 4000.
8. The white cover compound composition for transporting animal and vegetable products as claimed in claim 1 or 2, wherein the white reinforcing agent is composed of white carbon black, kaolin and silicate, and the mass ratio of the white reinforcing agent to the kaolin is 2: 1: 1.
9. the white transportation animal and vegetable product cover stock composition according to claim 1 or 2, wherein the vulcanization system consists of insoluble sulfur, accelerator DM and accelerator TMTD, and the mass ratio of insoluble sulfur, accelerator DM and accelerator TMTD is 5: 3: 1.
10. a method of preparing a white cover glue composition for transportation animal and vegetable products according to any one of claims 1 to 9, comprising the steps of:
putting nitrile rubber and styrene butadiene rubber into an internal mixer, plasticating for 20-30 seconds, heating to 30-60 ℃, adding zinc oxide, stearic acid, an anti-aging agent and tackifying resin, mixing for 20-30 seconds, heating to 60-90 ℃, then adding a white reinforcing agent and an auxiliary agent into the system for reaction, heating to 100-110 ℃, adding a plasticizer, mixing for 20-40 seconds, heating to 130-150 ℃, and discharging to obtain a first rubber material; standing the first rubber material for more than 4 hours, adding a vulcanization system into an internal mixer, mixing for 70-80 seconds, heating to 80-100 ℃, discharging to obtain a second rubber material, uniformly stirring the second rubber material on an open mill, and cooling to obtain the second rubber material.
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