CN102417618B - 40-degree natural rubber and production process thereof - Google Patents
40-degree natural rubber and production process thereof Download PDFInfo
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- CN102417618B CN102417618B CN 201110308878 CN201110308878A CN102417618B CN 102417618 B CN102417618 B CN 102417618B CN 201110308878 CN201110308878 CN 201110308878 CN 201110308878 A CN201110308878 A CN 201110308878A CN 102417618 B CN102417618 B CN 102417618B
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Abstract
The invention discloses a 40-degree natural rubber and a production process thereof. The 40-degree natural rubber comprises the following raw materials in percentage by weight: 50-60 percent of natural crude rubber, 0.5-2.5 percent of vulcanizing agent, 30-42 percent of medium thermal carbon black, 2.05-4.1 percent of activating agent, 0.03-0.7 percent of accelerating agent, 0.55-3.2 percent of anti-aging agent and 1-2.2 percent of plasticizing agent. 40-degree natural rubber which is remarkably improved on the aspects of aging resistance, elongation at break, wear resistance, rebound value, bearing decrement, inherent frequency, production cost and the like is obtained by performing rubber baking, rubber breaking, secondary plastifying and compounding.
Description
Technical field
The present invention relates to a kind of natural rubber and production technique thereof, concrete, the present invention relates to a kind of 40 degree natural rubber and production technique thereof.
Background technology
Natural rubber refers to the rubber of producing from natural rubber yielding plant.Natural rubber is a kind of natural high moleculer eompound take polyisoprene as main component, and molecular formula is (C
5H
8)
n, in its composition 91%～94%, rubber hydrocarbon (polyisoprene), all the other are the nonrubber materials such as protein, lipid acid, ash content, carbohydrate.Natural rubber is most widely used conventional rubber.
The natural rubber rubber is without certain fusing point, normal temperature end band plasticity, along with raising, temperature can slowly soften, fully softening during to 130～140 ℃, begin 200 ℃ of left and right to decompose, sharply decompose during to 270 ℃, reduce hardening gradually to temperature, temperature becomes crumbly mass when hanging down to-70 ℃, and being subjected to freezing rubber to be heated to normal temperature can restore to the original state.
Natural rubber has good elasticity, and the elastic extension maximum can reach 1000%, and Young's modulus is 2～4MPa.
Simultaneously, natural rubber has extraordinary physical strength, and hysteresis loss is little, and living heat is low when repeatedly being out of shape, so its flexible resistance is also fine, and because be non-polar rubber, so electrical insulation capability is good.
Because unsaturated double-bond is arranged, so natural rubber is the stronger material of a kind of chemical reaction ability, light, heat, ozone, radiation, subdue distortion and the metals such as copper, manganese and can promote that the check surface of rubber, elasticity disappear, physical and mechanical properties reduces, namely aging, not ageing-resistant is the deadly defect of natural rubber.
Because the elasticity of caouttchouc is excessive, therefore be difficult to be processed into various goods.Therefore, caouttchouc generally need to be processed with calendering process by plasticating.By plasticating, making rubber is soft plastic state by tough snappiness state-transition, and makes its plasticity-homogenizing, in order to make the uniform sizing material of quality; Mixing is with rubber mixing machine, rubber or plasticate rubber and Synergist S-421 95 to be smelt the technique of rubber unvulcanizate, is the most important production technique of Rubber processing.Essence is Synergist S-421 95 homodisperse process in rubber, and Synergist S-421 95 is disperse phase, and rubber is external phase.In mixing process, Synergist S-421 95 mainly comprises: vulcanizing agent, promotor, strengthening agent, promoting agent, anti-aging agent, softening agent etc.
Rubber shock absorber is one of important use of rubber, is widely used in precision equipment.The major advantage of rubber shock absorber is: 1, can make the goods of different shape and different hardness, have good elasticity and enough intensity; 2, can make very low that the natural frequency of vibrating isolation system does, and have higher damping; 3, no matter drawing, pressing, shearing and reversing under stressing conditions, be out of shape all larger.
Rubber is a kind of nonlinear resilient material, is almost incompressible.Only in distortion hour, just can be approx as linear body.Young's modulus and the hardness of rubber are closely related, and are subject to again the impact of temperature and shape.The static modulus of elasticity E of rubber under the long-duration load effect
SIncrease with rubber hardness increases, and rubber hardness is between shore hardness 30～70HS, and the elastic modulus change scope is 0≤E
S＜4.Dynamic modulus E
dObtain by experiment, rubber hardness is between shore hardness 30～70HS, and the dynamic elastic modulus variation range is 0＜E
d≤ 10.The average of relatives value of the dynamic elastic modulus of rubber and static modulus of elasticity
n
dBe called performance coeffcient, n
dBe worth the smaller the better.
Vibration isolator height and deflection close:
Δ＝(0.15～0.20)H
H＝(5～6.7)Δ
In above-mentioned scope, elastic modulus change is 5%.
The hardness of rubber is the significant parameter that determines rubber performance, considers from comprehensive angle, and the rubber that uses in vibration isolation, we generally adopt shore hardness 40 degree～90 degree.
According to by the total static load of vibration isolation object and vibration isolator quantity used, obtain the static load W (N) of each vibration isolator carrying.Natural frequency f according to the vibration isolation system requirement
0(f
0Determined by vibration isolation efficiency), obtain the vertical dynamic stiffness k that vibration isolator should have
zd(N/cm)
K in formula
zdThe vertical dynamic stiffness of-single vibration isolator (N/cm);
The single vibration isolator static load of W-(N);
G-universal gravity constant is got g=9.8cm/s
2
According to relation and the rubber hardness of dynamic and static modulus and rubber hardness, determine the quiet rigidity k of vibration isolator
zs
Generally, can be calculated as follows
The horizontal rigidity of vibration isolator is
The dynamic shear modulus N/cm of G-in formula
2,
S-vibration isolator Area of bearing;
H-vibration isolator height.
Determine the vertical quiet Δ that becomes of vibration isolator geometrical dimension
The supporting area S of vibration isolator
CN 101906221A discloses a kind of super-thick soft rubber and preparation method.Its formula comprises: natural rubber 1#100, carbon black N330 5～40, stearic acid 1～4, N-phenyl-a-naphthylamine 0.75～2.5, N-sec.-propyl-N '-diphenyl-para-phenylene diamine 1～4, paraffin 58#1～4, talcum powder 5～40, sulphur 1.5～5, magnesium oxide 2.5～7, zinc oxide 4～11, vulkacit D 0.75～2.5, solid coumarone 1～4, barium sulfate 10～60, Uniflex DBS 4～12, Stockholm tar 1.5～4.Natural rubber 1# is plasticated to plasticity number 0.6～0.65, add other raw material blendings, make film aftershaping and sulfuration.Before sulfuration, be aided with the partial qualitative clamping, can once stablize moulding and obtain super-thick soft rubber.
CN 102067040A discloses a kind of raw material for preparing high-damping rubber for automobile damping products, relates to the rubber technology field, and its feature is as follows by mass parts: chlorinated butyl rubber, 100; Carbon black N220,10～40; Carbon black N330,20～50; Naphthenic oil H-3107,20～40; Anti-aging agent RD, 1～3; Antioxidant 4010NA, 1～3; Leveler 40MSF, 3～6; Indirect process zinc oxide, 5～10; Magnesium oxide, 0.1～0.5; Accelerant B Z, 1～5.
There is certain defect in the natural rubber for preparing in prior art at aspects such as resistance to deterioration, tensile yield, rebound value, wear resistance, carrying draught, natural frequencies, and the products production cost is higher preferably for a small amount of properties.
Summary of the invention
For the deficiencies in the prior art, one of purpose of the present invention is to provide a kind of 40 degree natural rubbers, and it all is significantly improved at aspects such as resistance to deterioration, wear resistance, carrying draught, natural frequencies, has simultaneously lower production cost.
40 degree natural rubbers of the present invention, its raw material comprises according to mass percent:
As preferred version, described 40 degree natural rubbers, it only is comprised of according to mass percent following raw material:
The said components sum is 100%.
Preferred described 40 degree natural rubbers are comprised of according to mass percent following raw material:
The said components sum is 100%.
Described vulcanizing agent is preferably sulphur, organic sulfide, superoxide, metal oxide, benzoquinones, amine, a kind of or its mixture, the particularly preferably sulphur of further preferred sulphur, organic sulfide.
Described promoting agent preferably is comprised of mineral-type promoting agent and organic promoting agent, further preferably formed by zinc oxide and stearic acid, particularly preferably be comprised of 1%～4% zinc oxide and 0.05%～0.4% stearic acid, its quality percentage composition is the percentage composition in described raw material.
Described promotor is preferably thiazole accelerator, particularly preferably the 2-benzothiazolyl mercaptan.
Described anti-aging agent preferably is comprised of N-Phenyl beta naphthylamine and N-cyclohexyl-N '-diphenyl-para-phenylene diamine, further preferably be comprised of 0.05%～2.2%N-Phenyl beta naphthylamine and 0.05%～1.2%N-cyclohexyl-N '-diphenyl-para-phenylene diamine, its quality percentage composition is the percentage composition in described raw material.
Described softening agent is preferably butter.
Further preferred described 40 spend natural rubbers, are comprised of according to mass percent following raw material:
Rubber raw materials: caouttchouc 55.5%
Vulcanizing agent: sulphur 1.7%
Strengthening agent: middle medium thermal carbon blacks 36%
Promoting agent: zinc oxide 2.8%, stearic acid 0.28%
Promotor: 2-benzothiazolyl mercaptan 0.35%
Anti-aging agent: N-Phenyl beta naphthylamine 1.1%, N-cyclohexyl-N '-diphenyl-para-phenylene diamine 0.56%
Softening agent: butter 1.71%.
Sulphur of the present invention can be known product for SULPHUR POWDER, precipitated sulfur, colloid sulphur, insoluble sulfur etc., can commercially availablely obtain or obtain according to the preparation method of prior art/new technology.
Middle medium thermal carbon blacks of the present invention is by spherical, oval charcoal and a small amount of welding particle form in a large number, have that particle diameter is large, specific surface area is little, structure is low, easily disperse and the characteristics such as good fluidity, it can increase tensile yield and rebound value, and can shorten mixing time, be the existing procucts of affiliated technical field, can commercially availablely obtain or obtain according to the preparation method of prior art/new technology.
The promoting agent that zinc oxide of the present invention and stearic acid form, promoting agent the most frequently used when being the vulcanization system that employing sulphur-promotor forms makes up.Wherein, described zinc oxide can be the zinc oxide of rubber special use; Described stearic acid, i.e. octadecanoic acid, molecular formula C
18H
36O
2Described zinc oxide and stearic acid are the existing procucts of affiliated technical field, can commercially availablely obtain or obtain according to the preparation method of prior art/new technology.
2-benzothiazolyl mercaptan of the present invention, another name: captax is a kind of main acid cure agent, has MC speed.Its curing temperature is low, easily disperses in rubber, does not pollute, and mainly for the manufacture of tire, adhesive tape, rubber overshoes and other industrial rubber articles, its chemical structural formula is:
Described 2-benzothiazolyl mercaptan is the existing procucts of affiliated technical field, can commercially availablely obtain or obtain according to the preparation method of prior art/new technology.
N-Phenyl beta naphthylamine of the present invention, another name: antioxidant D, be light grey powder, effective to heat, oxygen, fatigue aging, its chemical structural formula is:
Described N-Phenyl beta naphthylamine is the existing procucts of affiliated technical field, can commercially availablely obtain or obtain according to the preparation method of prior art/new technology.
N-cyclohexyl-N ' of the present invention-diphenyl-para-phenylene diamine, another name: antioxidant 4010 is bright grey powder, ozone and fatigue aging there is special efficacy, aging also very effective to oxygen, heat, light and metal ion is called as " all-round anti-aging agent ", and its chemical structural formula is:
Described N-cyclohexyl-N '-diphenyl-para-phenylene diamine is the existing procucts of affiliated technical field, can commercially availablely obtain or obtain according to the preparation method of prior art/new technology.
Butter of the present invention belongs to again tenderizer, carbon black is evenly distributed fast, can improve flexibility, heat distortion, the snappiness of rubber, improve the rubber glossiness, plasticizing efficiency is high, and intermiscibility is good, is difficult for oxidation and volatilization, be the existing procucts of affiliated technical field, can commercially availablely obtain or obtain according to the preparation method of prior art/new technology.
40 degree natural rubbers of the present invention, can add as required other additives, such as scorch retarder, pigment etc., it is all known technologies of affiliated technical field, the person of ordinary skill in the field is according to its knowledge of grasping, can freely select as required suitable additive, the present invention describes in detail no longer at this point.
Another object of the present invention is to provide the production technique of 40 degree natural rubbers.
The production technique of described 40 degree natural rubbers comprises the following steps:
(1) drying glue: the caouttchouc of the regulation of filling a prescription is placed under 30～70 ℃, drying glue at least 3 hours;
(2) broken glue: the caouttchouc after drying glue breaks glue immediately.During broken glue, roll spacing is 0.3mm～0.9mm;
(3) plasticate for the first time: caouttchouc is divided at least 3 equal portions, and every part of weight is no more than 20kg.Roll spacing is 0.3mm to 0.9mm, requires clot and turns 90 ° and plasticate for lower time.Cross continuously roller 10 to 18 times;
(4) park at least 3 hours after, plasticate for the second time.Plasticating for the second time is still that roll spacing is adjusted into 0.3mm to 0.9mm, and clot is also turned 90 ° and plasticated for lower time, crosses roller 10 to 18 times continuously.After parking at least 3 hours, the calendering process of being allowed for access;
(5) mixing: the virgin rubber that will plasticate is put into mill, makes its bag roller, and after complete evenly bag roller, promoting agent and anti-aging agent mixing with the formula regulation divide at least 2 times and add.After roller at least 2 times, it is uniformly dispersed, at least divide afterwards the middle medium thermal carbon blacks and the softening agent that add in turn formula regulation for 2 times, the mixing promotor that adds the formula regulation after evenly of middle medium thermal carbon blacks and softening agent, the vulcanizing agent that adds at last formula to stipulate.
As preferred version, in step (1), caouttchouc is placed in carries out drying glue in baking oven, preferred 40～60 ℃ of drying glue temperature; Preferably at least 4 hours drying glue time;
In step (2), during broken glue, roll spacing is preferably 0.4mm～0.8mm, is particularly preferably 0.5mm～0.7mm.
In step (3), preferably caouttchouc is divided into 3 equal portions.
In step (3), after preferred decile, every part of caouttchouc weight is no more than 18kg, further preferably is no more than 16kg, particularly preferably is no more than 15kg.
In step (3), preferred roll spacing is 0.4mm to 0.8mm, and particularly preferably roll spacing is 0.5mm to 0.7mm.
In step (3), preferred continuous roller excessively 11 to 17 times, particularly preferably continuous roller excessively is 12 to 15 times.
In step (4), before plasticating for the second time, preferably parked at least 4 hours.
In step (4), the preferred roll spacing of plasticating for the second time is 0.4mm to 0.8mm, and particularly preferably roll spacing is 0.5mm to 0.7mm.
In step (4), preferred continuous roller excessively 11 to 17 times, particularly preferably continuous roller excessively is 12 to 15 times.
In step (4), after plasticating for the second time, after preferably parking at least 4 hours, further preferably be no more than 12 days, particularly preferably be no more than 10 days, then enter calendering process.Preferably the rubber that the storage period is long, re-start and plasticate.
In step (5), mixed promoting agent and anti-aging agent preferably divide at least and add for 3 times, particularly preferably 3 times.
In step (5), preferred roller excessively 2～4 times is particularly preferably crossed roller 2～3 times.
In step (5), middle medium thermal carbon blacks and softening agent preferably divide at least and add for 3 times, particularly preferably 3 times.
Described 40 degree natural rubbers are preferred for making rubber shock absorber.
The prepared 40 degree natural rubbers of the present invention adopt caouttchouc to make raw material, therefore have higher intensity, extensibility; By the add-on of adjustment carbon black and the selection of carbon black types, change rubber hardness and elasticity, so that its rubber that has than the prior art preparation has better carrying draught and natural frequency; The natural rubber of the preparation of the present invention simultaneously all is significantly increased at aspects such as resistance to deterioration, tensile yield, wear resistance, rebound values, and surface cleaning, and pliability is better, and has lower production cost, has significant advantage.
Description of drawings
Fig. 1 is the Comparative Examples one quiet rigidity test result of the product RA1500EMA of U.S. U company
Fig. 2 is the quiet rigidity test result of natural rubber of Comparative Examples two preparations
Fig. 3 is the quiet rigidity test result of natural rubber of Comparative Examples three preparations
Fig. 4 is the quiet rigidity test result of the natural rubber of embodiment one preparation
Embodiment
For ease of understanding the present invention, it is as follows that the present invention enumerates embodiment.Those skilled in the art should understand, described embodiment helps to understand the present invention, should not be considered as concrete restriction of the present invention.
Comparative Examples one
The product RA1500EMA of U.S. U company that represents prior art is carried out quiet rigidity test.
Fig. 1 is the Comparative Examples one quiet rigidity test result of the product RA1500EMA of U.S. U company.
This kind rubber properties is all than more excellent, but production cost is higher, has restricted it and has promoted the use of.
Comparative Examples two
Prepare in accordance with the following steps 40 degree natural rubbers:
(1) take caouttchouc 65g, spray carbon black 21g, sulphur 7g, zinc oxide 2.8g, stearic acid 0.28g, 2-benzothiazolyl mercaptan 0.58g, anti-aging agent: N-Phenyl beta naphthylamine 1.11g, N-cyclohexyl-N '-diphenyl-para-phenylene diamine 0.56g, butter 1.67g.
(2) make 40 degree natural rubbers according to production technique disclosed by the invention.
Fig. 2 is the quiet rigidity test result of natural rubber of Comparative Examples two preparations.
The quiet rigidity test result of RA1500EMA in this test-results and Comparative Examples one is compared as can be known, and both performances are very approaching, but this Comparative Examples product carrying draught is larger, illustrates that vulcanized rubber is partially soft.Be to reduce sulfur consumption so revise the scheme of rubber compounding, increase carbon black loading, to reduce rubber carrying draught.
Comparative Examples three
Prepare in accordance with the following steps 40 degree natural rubbers:
(1) take natural rubber 55.5g, sulphur 1.67g, spray carbon black 36.1g, zinc oxide 2.8g, stearic acid 0.28g, 2-benzothiazolyl mercaptan 0.33g, N-Phenyl beta naphthylamine 1.11g, N-cyclohexyl-N '-diphenyl-para-phenylene diamine 0.56g, butter 1.67g.
(2) make 40 degree natural rubbers according to production technique disclosed by the invention.
Fig. 3 is the quiet rigidity test result of natural rubber of Comparative Examples three preparations.
The quiet rigidity test result of RA1500EMA in this test-results and Comparative Examples one is compared as can be known, this Comparative Examples product draught is than the large 0.6～1.1mm of RA1500EMA, the little approximately 1.0Hz of natural frequency, namely the vibration isolation efficiency of this product is better than Comparative Examples one product under identical load.But because draught is larger, do not meet service requirements, therefore need further to improve, namely change carbon black types.
Embodiment one
Prepare in accordance with the following steps 40 degree natural rubbers of the present invention:
(1) drying glue: the 55.5g caouttchouc is placed in baking oven under 60 ℃ drying glue 4 hours;
(2) broken glue: the caouttchouc after drying glue breaks glue immediately.During broken glue, roll spacing is 0.5mm;
(3) plasticate for the first time: caouttchouc is divided into 3 equal portions, and every part of weight is 18.5kg.Roll spacing is 0.5mm, requires clot and turns 90 ° and plasticate for lower time.Cross continuously roller 12 times;
(4) park 4 hours after, plasticate for the second time.The roll spacing of plasticating for the second time is adjusted into 0.5mm, and clot is also turned 90 ° and plasticated for lower time, crosses roller 12 times continuously.After parking 4 hours, enter calendering process;
(5) mixing: the virgin rubber that will plasticate is put into mill, makes it wrap roller, after fully evenly wrapping roller, 2.8g zinc oxide, 0.28g stearic acid, 1.1g N-Phenyl beta naphthylamine, 0.56g N-cyclohexyl-N '-diphenyl-para-phenylene diamine is mixed, and divides to add for 3 times.After roller 3 times, it is uniformly dispersed, add in turn afterwards medium thermal carbon blacks and 1.71g butter in 36g for 3 times, middle medium thermal carbon blacks and butter are mixing adds 0.35g 2-benzothiazolyl mercaptan after evenly, adds at last 1.7g sulphur.
Fig. 4 is the quiet rigidity test result of the natural rubber of embodiment one preparation.
By test result as can be known, when this product was respectively 100kg and 200kg in load, one product RA1500EMA compared with Comparative Examples, and draught is large 0.3mm and 0.2mm respectively, the high 0.6Hz of natural frequency and 2.1Hz, namely the vibration isolation efficiency of this product is better than Comparative Examples one product under identical load.
This product is used for the numerically-controlled precise machine, in use the carrying draught is had relatively high expectations.The present embodiment product in use, product draught and RA1500EMA are very approaching, substantially reach requirement.
Embodiment two
Prepare in accordance with the following steps 40 degree natural rubbers of the present invention:
(1) drying glue: the 50g caouttchouc is placed under 70 ℃ drying glue 3 hours;
(2) broken glue: the caouttchouc after drying glue breaks glue immediately.During broken glue, roll spacing is 0.3mm;
(3) plasticate for the first time: caouttchouc is divided into 3 equal portions, and every part of weight is about 16.667kg.Roll spacing is 0.3mm, requires clot and turns 90 ° and plasticate for lower time.Cross continuously roller 18 times;
(4) park 5 hours after, plasticate for the second time.The roll spacing of plasticating for the second time is adjusted into 0.3mm, and clot is also turned 90 ° and plasticated for lower time, crosses roller 18 times continuously.After parking 5 hours, enter calendering process;
(5) mixing: the virgin rubber that will plasticate is put into mill, makes it wrap roller, and after fully evenly wrapping roller, with 3.45g zinc oxide, 0.2g stearic acid, 2.2g N-Phenyl beta naphthylamine, 1g N-cyclohexyl-N '-diphenyl-para-phenylene diamine mix, and divide to add for 5 times.After roller 4 times, it is uniformly dispersed, divide afterwards to add in turn medium thermal carbon blacks and 1g butter in 41.62g for 5 times, middle medium thermal carbon blacks and butter are mixing adds 0.03g 2-benzothiazolyl mercaptan after evenly, adds at last 0.5g sulphur.
Embodiment three
Prepare in accordance with the following steps 40 degree natural rubbers of the present invention:
(1) drying glue: the 59.95g caouttchouc is placed under 30 ℃ drying glue 5 hours;
(2) broken glue: the caouttchouc after drying glue breaks glue immediately.During broken glue, roll spacing is 0.9mm;
(3) plasticate for the first time: caouttchouc is divided into 3 equal portions, every part of weight 19.98kg.Roll spacing is 0.9mm, requires clot and turns 90 ° and plasticate for lower time.Cross continuously roller 10 times;
(4) park 4 hours after, plasticate for the second time.The roll spacing of plasticating for the second time is adjusted into 0.9mm, and clot is also turned 90 ° and plasticated for lower time, crosses roller 10 times continuously.After parking 4 hours, enter calendering process;
(5) mixing: the virgin rubber that will plasticate is put into mill, makes it wrap roller, after fully evenly wrapping roller, 3.75g zinc oxide, 0.35g stearic acid, 0.5g N-Phenyl beta naphthylamine, 0.05g N-cyclohexyl-N '-diphenyl-para-phenylene diamine is mixed, and divides to add for 2 times.After roller 2 times, it is uniformly dispersed, divide afterwards to add in turn medium thermal carbon blacks and 2.2g butter in 30g for 2 times, middle medium thermal carbon blacks and butter are mixing adds 0.7g 2-benzothiazolyl mercaptan after evenly, adds at last 2.5g sulphur.
Embodiment four
Prepare in accordance with the following steps 40 degree natural rubbers of the present invention:
(1) drying glue: the 52g caouttchouc is placed under 40 ℃ drying glue 4 hours;
(2) broken glue: the caouttchouc after drying glue breaks glue immediately.During broken glue, roll spacing is 0.7mm;
(3) plasticate for the first time: caouttchouc is divided into 4 equal portions, every part of weight 13kg.Roll spacing is 0.7mm, requires clot and turns 90 ° and plasticate for lower time.Cross continuously roller 15 times;
(4) park 4 hours after, plasticate for the second time.The roll spacing of plasticating for the second time is 0.7mm, and clot is also turned 90 ° and plasticated for lower time, crosses roller 17 times continuously.After parking 8 days, enter calendering process;
(5) mixing: the virgin rubber that will plasticate is put into mill, makes it wrap roller, after fully evenly wrapping roller, 2g zinc oxide, 0.35g stearic acid, 1.5gN-Phenyl beta naphthylamine, 0.3gN-cyclohexyl-N '-diphenyl-para-phenylene diamine is mixed, and divides to add for 3 times.After roller 3 times, it is uniformly dispersed, divide afterwards to add in turn medium thermal carbon blacks and 1.9g butter in 39.75g for 3 times, middle medium thermal carbon blacks and butter are mixing adds the 0.2g2-benzothiazolyl mercaptan after evenly, adds at last 2g sulphur.
Comparative example and Comparative Examples are as can be known, the present invention adopts unique formula combination, makes the properties of 40 degree natural rubbers compared to prior art, has all obtained significantly progressive, and production cost reduces greatly, has solved prior art unsolved technical barrier always.
Applicant's statement, the present invention illustrates detailed process equipment and process flow process of the present invention by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and process flow process, does not mean that namely the present invention must rely on above-mentioned detailed process equipment and process flow process and could implement.The person of ordinary skill in the field should understand, any improvement in the present invention is to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., within all dropping on protection scope of the present invention and open scope.
Claims (24)
1. the preparation method of a degree natural rubber, described 40 degree natural rubber raw materials comprise according to mass percent:
It is characterized in that, described preparation method comprises the following steps:
(1) drying glue: the caouttchouc of the regulation of filling a prescription is placed under 30 ~ 70 ℃, drying glue at least 3 hours;
(2) broken glue: the caouttchouc after drying glue breaks glue immediately, and during broken glue, roll spacing is 0.3mm ~ 0.9mm;
(3) plasticate for the first time: caouttchouc is divided at least 3 equal portions, and every part of weight is no more than 20kg, and roll spacing is 0.3mm to 0.9mm, requires clot and turns 90 ° and plasticate for lower time, crosses roller 10 to 18 times continuously;
(4) park at least 3 hours after, plasticate for the second time, plasticating for the second time is still that roll spacing is adjusted into 0.3mm to 0.9mm, clot is also turned 90 ° and is plasticated for lower time, crosses roller 10 to 18 times continuously, after parking at least 3 hours, the calendering process of being allowed for access;
(5) mixing: the virgin rubber that will plasticate is put into mill, make its bag roller, after fully evenly wrapping roller, promoting agent and the anti-aging agent of formula regulation are mixed, divide at least 2 times and add, after roller at least 2 times, it is uniformly dispersed, at least divide afterwards the middle medium thermal carbon blacks and the softening agent that add in turn formula regulation for 2 times, the mixing promotor that adds the formula regulation after evenly of middle medium thermal carbon blacks and softening agent, the vulcanizing agent that adds at last formula to stipulate.
2. the method for claim 1, is characterized in that, it only is comprised of according to mass percent following raw material:
The said components sum is 100%.
3. the method for claim 1, is characterized in that, it is comprised of according to mass percent following raw material:
The said components sum is 100%.
4. as the described method of claim 1-3 any one, it is characterized in that, described vulcanizing agent is sulphur, organic sulfide, superoxide, metal oxide, benzoquinones, amine;
Described promoting agent is comprised of zinc oxide and stearic acid;
Described promotor is thiazole accelerator;
Described anti-aging agent is comprised of N-Phenyl beta naphthylamine and N-cyclohexyl-N '-diphenyl-para-phenylene diamine;
Described softening agent is butter.
5. the method for claim 1, is characterized in that, it is comprised of according to mass percent following raw material:
Rubber raw materials: caouttchouc 55.5%
Vulcanizing agent: sulphur 1.7%
Strengthening agent: middle medium thermal carbon blacks 36%
Promoting agent: zinc oxide 2.8%, stearic acid 0.28%
Promotor: 2-benzothiazolyl mercaptan 0.35%
Anti-aging agent: N-Phenyl beta naphthylamine 1.1%, N-cyclohexyl-N '-diphenyl-para-phenylene diamine 0.56%
Softening agent: butter 1.71%.
6. method as claimed in claim 4, is characterized in that, described promoting agent is comprised of 1% ~ 4% zinc oxide and 0.05% ~ 0.4% stearic acid, and its quality percentage composition is the percentage composition in described raw material.
7. method as claimed in claim 4, is characterized in that, described promotor is the 2-benzothiazolyl mercaptan.
8. method as claimed in claim 4, is characterized in that, described anti-aging agent is comprised of 0.05% ~ 2.2%N-Phenyl beta naphthylamine and 0.05% ~ 1.2%N-cyclohexyl-N '-diphenyl-para-phenylene diamine, and its quality percentage composition is the percentage composition in described raw material.
9. method as claimed in claim 4, is characterized in that, described vulcanizing agent is a kind of of sulphur, organic sulfide or its mixture.
10. method as claimed in claim 9, is characterized in that, described vulcanizing agent is sulphur.
11. the method for claim 1 is characterized in that, in step (1), caouttchouc is placed in carries out drying glue in baking oven, 40 ~ 60 ℃ of drying glue temperature; At least 4 hours drying glue time;
In step (2), during broken glue, roll spacing is 0.4mm ~ 0.8mm.
12. method as claimed in claim 11 is characterized in that, in step (2), during broken glue, roll spacing is 0.5mm ~ 0.7mm.
13. the method for claim 1 is characterized in that, in step (3), caouttchouc is divided into 3 equal portions;
In step (3), after decile, every part of caouttchouc weight is no more than 18kg;
In step (3), roll spacing is 0.4mm to 0.8mm;
In step (3), continuous roller excessively 11 to 17 times.
14. method as claimed in claim 13 is characterized in that, in step (3), after decile, every part of caouttchouc weight is no more than 16kg.
15. method as claimed in claim 14 is characterized in that, in step (3), after decile, every part of caouttchouc weight is no more than 15kg.
16. method as claimed in claim 13 is characterized in that, in step (3), roll spacing is 0.5mm to 0.7mm.
17. method as claimed in claim 13 is characterized in that, in step (3), and continuous roller excessively 12 to 15 times.
18. the method for claim 1 is characterized in that, in step (4), before plasticating for the second time, parks at least 4 hours;
In step (4), the roll spacing of plasticating for the second time is 0.4mm to 0.8mm;
In step (4), continuous roller excessively 11 to 17 times;
In step (4), after plasticating for the second time, after parking at least 4 hours, then enter calendering process, the rubber that the storage period is long re-starts and plasticates;
In step (5), mixed promoting agent and anti-aging agent divide at least 3 times and add;
In step (5), cross roller 2～4 times;
In step (5), middle medium thermal carbon blacks and softening agent divide at least 3 times and add.
19. method as claimed in claim 18 is characterized in that, in step (4), the roll spacing of plasticating for the second time is 0.5mm to 0.7mm.
20. method as claimed in claim 18 is characterized in that, in step (4), and continuous roller excessively 12 to 15 times.
21. method as claimed in claim 18 is characterized in that, in step (4), after plasticating for the second time, the storage period is no more than 12 days.
22. method as claimed in claim 18 is characterized in that, in step (5), mixed promoting agent and anti-aging agent divide 3 times and add.
23. method as claimed in claim 18 is characterized in that, in step (5), crosses roller 2～3 times.
24. method as claimed in claim 18 is characterized in that, in step (5), middle medium thermal carbon blacks and softening agent divide 3 times and add.
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| CN 201110308878 CN102417618B (en) | 2011-10-12 | 2011-10-12 | 40-degree natural rubber and production process thereof |
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| CN103467784B (en) * | 2012-06-06 | 2015-05-20 | 安徽华晶机械股份有限公司 | Method for manufacturing vibration isolator |
| CN104816393A (en) * | 2015-03-31 | 2015-08-05 | 陈巧兰 | Production method of automobile steering wheel rubber sleeve |
| CN105694131B (en) * | 2016-04-12 | 2018-01-30 | 青岛思锐科技有限公司 | Axle box rubber spring low hysteresis sizing composition and preparation method thereof |
| CN106939090A (en) * | 2017-01-23 | 2017-07-11 | 宁波捷豹振动控制系统有限公司 | Engine mounting sizing material and preparation method thereof |
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|---|---|---|---|---|
| CN101955598A (en) * | 2010-09-27 | 2011-01-26 | 上海众力汽车部件有限公司 | Rubber formula with low ratio of dynamic stiffness and static stiffness and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101955598A (en) * | 2010-09-27 | 2011-01-26 | 上海众力汽车部件有限公司 | Rubber formula with low ratio of dynamic stiffness and static stiffness and preparation method thereof |
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| 中粒子热裂法炭黑的试验与应用;王洪吉等;《橡胶工业》;19981231;第45卷(第6期);第353-355页 * |
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