CN102850591A - Application of phosphatidylserine in rubber vulcanization and anti-aging - Google Patents
Application of phosphatidylserine in rubber vulcanization and anti-aging Download PDFInfo
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- CN102850591A CN102850591A CN2012103592223A CN201210359222A CN102850591A CN 102850591 A CN102850591 A CN 102850591A CN 2012103592223 A CN2012103592223 A CN 2012103592223A CN 201210359222 A CN201210359222 A CN 201210359222A CN 102850591 A CN102850591 A CN 102850591A
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Abstract
The invention discloses application of phosphatidylserine in rubber vulcanization and anti-aging. According to a first use method, the phosphatidylserine is added in the early rubber processing process, and the adding amount of phosphatidylserine accounts for 0.01%-1% of the total weight of the rubber; according to a second use method, the phosphatidylserine is added in the rubber production process, and the adding amount of phosphatidylserine accounts for 0.01%-1% of the total weight of the rubber. Due to the application of phosphatidylserine in rubber vulcanization and anti-aging, the curing rate and the aging coefficient of the rubber are increased, and the property of the rubber is improved.
Description
Technical field
The present invention relates to the application of phosphatidylserine, be specifically related to phosphatidylserine as the new purposes of vulcanization accelerator and the anti-aging agent of rubber, belong to the rubber production technical field.
Background technology
Rubber is divided into two kinds of natural rubber and synthetic rubber.Natural rubber of the present invention be the fresh latex that produces of Brazilian para ruber through solidify, slaking, crumple, granulation, drying and make.
The fresh latex that Brazil para ruber produces is commonly referred to as natural fresh latex.The composition of natural fresh latex is very complicated, except rubber hydrocarbon, also contains tens kinds of other materials, i.e. nonrubber material, these materials account for latex heavy 5%.Although the shared latex deal of these nonrubber materials is few, latex and the character that makes rubber there is in various degree impact.Usually these nonrubber materials are divided into following several large class:
(1) protein.The protein content of fresh latex accounts for the heavy 1%-2% of latex, and 20% surface that is distributed in rubber particles is wherein arranged approximately, is the important composition material of micelle protective layer, and about 20% is present in the liquid of latex bottom part, and rest part then is dissolved in the whey.In the glue production process, a part of protein flows away with whey in the latex, and remaining then still stays in the rubber.Protein still has larger impact to the performance of rubber except to latex stable influential.On the one hand, the degradation production of protein can promote the sulfuration of rubber, improves the fixed stretching strength of rubber, delays the aging of rubber, makes rubber item durable.On the other hand, it has again stronger water-absorbent, can increase the water-absorbent of rubber item and conducting electricity property, makes easily rubber item mouldy and be unfavorable for making the electrical material of insulativity.
(2) lipoid.Lipoid in the fresh latex mainly are fat, wax class, stay alcohol, stay alcohol ester and phosphide.These lipoid are all water insoluble, mainly are distributed in the rubber phase, are present on a small quantity in latex bottom and the corpora flava.The content of lipoid in latex is about 0.9%, and major part is phosphide (about 70%).The surface activity of latex phosphide is very high, and on the rubber particles surface, it and protein bound form the very thin hybrid films of one deck together, and it is exactly this reason that fresh latex can keep the stability of colloid.Ammonia is preserved the raising of latex mechanical stability in storage process, is owing to lipid acid and ammonia react in the lipoid in the latex have generated ammonium soaps, forms the result of protective membrane on the micelle surface.
(3) the molten thing of acetone.The material that can be dissolved in acetone in the latex is referred to as the molten thing of acetone.Nearly all be dissolved in acetone in the above-mentioned lipoid except phosphide, belong to the molten thing of acetone, the content in fresh latex is about 1%～2%.Contain lipid acid more than 50% in the molten thing of acetone, when rubber plastic steelmaking, play ramollescence, make rubber obtain easily plasticity-, the molten thing of acetone has age inhibiting effect to rubber simultaneously.
(4) water solubles.The about 1%-2% of the content of the water solubles in latex mainly is distributed in the whey.Carbohydrate decomposes the generation voltaile fatty acid easily under the effect of bacterium, mainly be that acetic acid also has a small amount of formic acid and propionic acid.The content of volatile fatty acids raises, and the stability of latex will reduce, even natural coagulation.
(5) inorganic salt.The content of inorganic salt about 0.3%～0.7% in the fresh latex.Mineral ion in the fresh latex, major part are distributed in the whey, and a small amount of copper, potassium ion may also have iron ion to link to each other with rubber particles, and a large amount of magnesium ions then is present in the bottom of latex.
In addition, also exist various bacteria and enzyme in the latex.
In the slaking of the solidifying of natural fresh latex, grumeleuse, crumple, in the process such as granulation, nonrubber composition major part in the latex is drained with whey, be retained in the dried glue and only have small portion, but this small portion nonrubber composition is very big on the impact of rubber performance, if remove the nonrubber composition in the natural rubber, its performance then declines to a great extent.Because the difference of adhesive-preparing technology, there are very big-difference in the kind and the content that are retained at last the nonrubber composition in the dried glue, cause the inconsistent of natural rubber performance.
Synthetic rubber then is to get through the synthetic of monomer and refining, polymerization process and rubber aftertreatment.Synthetic rubber does not contain the nonrubber composition that natural rubber has, and its over-all properties is obviously not as natural rubber.
Aging is a kind of comparatively general phenomenon that exists in the macromolecular material such as rubber, and it can make the performance degradation of rubber, affect use value and the work-ing life of rubber item, and the preventing rubber system is delay rubber aging, the work-ing life of prolongation goods.The preventing rubber system mainly is anti-aging agent, and the anti-aging agent type can be divided into chemical antiager and physical antioxidant by action principle; Target by protection is divided into oxidation inhibitor, protects ozonidate, photomask agent, metal passivator etc., also can classify by chemical structure.In order to improve the character of rubber, the researchist is unremittingly studying always.
Phosphatidylserine claims again serine phosphatide, diacylglycerol acyl phosphoserine.Mainly extracted by crude soya bean oil expression residuum.Be the active substance of cytolemma, especially be present in the brain cell.Its function mainly is to improve the neurocyte function, regulates the conduction of Nerve impulse, promotes the brain memory function.And can activate the metabolism of multiple enzyme with synthetic.
Phosphatidylserine is white in color or faint yellow bulky powder, can be emulsifiable in water.Be insoluble to ethanol, methyl alcohol; Be dissolved in chloroform, ether, sherwood oil.The synthetic material is only soluble in chloroform.
Above-mentioned discussion content purpose is to introduce to the public all respects of technology that may be relevant with all respects of the present invention that below will be described and/or advocate, believe that this discussion content helps to provide background information for the public, to be conducive to understanding better all respects of the present invention, therefore, should be appreciated that it is to read these discussions with this angle, rather than admit prior art.
Summary of the invention
The object of the present invention is to provide the application of phosphatidylserine aspect the vulcanization of rubber and anti-aging, phosphatidylserine is as a kind of novel thiofide and/or anti-aging agent, can Effective Raise vulcanization rate and the aging coefficient of rubber, improve the performance of rubber.
Purpose of the present invention is achieved through the following technical solutions:
Phosphatidylserine is as a kind of novel thiofide and/or anti-aging agent.
Rubber preliminary working method is added phosphatidylserine in rubber preliminary working process, the add-on of phosphatidylserine accounts for 0.01%-1% of rubber gross weight.
The rubber item production method is added phosphatidylserine in the rubber item production process, the add-on of phosphatidylserine accounts for 0.01%-1% of rubber gross weight.
Described rubber is natural rubber or synthetic rubber or mixed rubber.
Described phosphatidylserine is biochemical SILVER REAGENT or pharmaceutical grade or food grade or technical grade.
The invention has the beneficial effects as follows: along with the adding of phosphatidylserine, the vulcanization rate of rubber is obviously accelerated, and the ageing resistance of rubber item is obviously improved simultaneously.
Beneficial effect of the present invention can embody by following experiment:
Prescription: 100 parts of natural rubbers, 0.20 part of phosphatidylserine, 3.50 parts of Sulfurs, 0.50 part of stearic acid, 6.00 parts in zinc oxide, accelerant MBT (benzothiazolyl mercaptan, 2-Mercaptobenzothiazole) 0.50 part (by weight).
Described natural rubber is that nitrogen content is the 0.012%(massfraction), foreign matter content is the 0.004%(massfraction) high-purity natural rubber.
Described phosphatidylserine is the biochemical reagents levels.
High-purity natural rubber is that 45 ℃-55 ℃ mill is plasticated in temperature, discharging when [ML(1+4) 100 ℃] that mooney viscosity reaches 60.Rubber through over-mastication carries out mixing at mixing roll, by above-mentioned vulcanization system and be sequentially added into vulcanization accelerator and phosphatidylserine, anti-aging agent, zinc oxide, stearic acid, Sulfur, mix rear discharging until these Synergist S-421 95s, during the roller temperature control of mixing roll at 45 ℃-55 ℃.
The rubber unvulcanizate of gained is used without the rotor vulkameter and is carried out the vulcanization characteristics test at 140 ℃, obtains its initial curing time (t
S1) be 2.07 minutes, sulfurizing time (t
90) be 24.52 minutes, its vulcanization rate is 4.45 as calculated.Rubber unvulcanizate vulcanizes at 100 tons 140 ℃ vulcanizing press, the test piece of preparation cross-linked rubber, and curing time was pressed the definite sulfurizing time of vulkameter 24.52 minutes.The test piece of preparation is carried out tension test through being cut into the dumbbell shape test piece at electronic tensile machine, and the part of simultaneously these dumbbell shape test pieces wore out 24 hours at 100 ℃ hot air aging case, then carried out tensile strength test at electronic tensile machine.Stretch test result is before aging: tensile strength 11.1MPa, tensile yield 680%; Aging back draft test-results is: tensile strength 4.90MPa, tensile yield 673%.Aging coefficient is 0.437 as calculated.Controlled trial is not except adding the phosphatidylserine, and all test conditionss are all identical, the initial curing time (t of control sample
S1) be 3.68 minutes, sulfurizing time (t
90) be 35.42 minutes, its vulcanization rate is 3.15 as calculated; The aging front stretch test result of control sample is: tensile strength 11.4MPa, tensile yield 1083%, aging back draft test-results is: tensile strength 0.94MPa, tensile yield 470%.Aging coefficient is 0.036 as calculated.After adding phosphatidylserine in the high-purity natural rubber, its vulcanization rate comparison has improved 41.3% in the same old way, and the aging coefficient of cross-linked rubber has improved 1114% than control sample, and the ageing resistance of rubber item is obviously improved.
Embodiment
Below by embodiment the present invention is described in further details, these embodiment only are used for illustrating the present invention, do not limit the scope of the invention.
Embodiment 1
In 1 kilogram natural rubber, with other Synergist S-421 95s such as filler (such as carbon black or White Carbon black), stearic acid, zinc oxide, vulcanization accelerator, anti-aging agent, Sulfurs, the phosphatidylserine that adds 0.2 gram in mixing process is mixingly evenly made rubber item by sulfuration.
Operation steps: natural rubber is that 45 ℃-55 ℃ mill is plasticated in temperature, reaches 60[ML(1+4 at its mooney viscosity) 100 ℃] time discharging.Rubber through over-mastication carries out mixing at mixing roll, and be sequentially added into vulcanization accelerator and phosphatidylserine, anti-aging agent, zinc oxide, stearic acid, various filler, after after a while mixing, add Sulfur, mix rear discharging until these Synergist S-421 95s, during the roller temperature control of mixing roll at 45 ℃-55 ℃.Through mixing rubber roll again, extrusion, moulding, vulcanize (the optimum curing time can be determined with vulkameter first) at 140 ℃ vulcanizers and make rubber item.
Embodiment 2
In 1 kilogram synthetic rubber, with other Synergist S-421 95s such as filler (such as carbon black or White Carbon black), stearic acid, zinc oxide, vulcanization accelerator, anti-aging agent, Sulfurs, the phosphatidylserine that adds 0.5 gram in mixing process is mixingly evenly made rubber item by sulfuration.
Elastomeric kind is more, and every kind of elastomeric operational condition is the same not to the utmost, and following operation steps take polyisoprene rubber is as example.
Operation steps: the mooney viscosity of polyisoprene rubber is lower than 60[ML(1+4) 100 ℃] time do not need to plasticate, the polyisoprene rubber that need to plasticate is thin-pass 1-2 time in the mill of 50 ℃ of-60 ℃ of pony roll distances in the roller temperature first, behind film bag roller, tune up a little roll spacing and continue to plasticate about 2 minutes, make rubber form continuous gloss film at roller surface and get final product.Rubber through over-mastication carries out mixing at mixing roll, and be sequentially added into vulcanization accelerator and phosphatidylserine, anti-aging agent, zinc oxide, stearic acid, various filler, after after a while mixing, add Sulfur, mix rear discharging until these Synergist S-421 95s, during the roller temperature control of mixing roll at 40 ℃-50 ℃.Through mixing rubber roll again, extrusion, moulding, vulcanize (the optimum curing time can be determined with vulkameter first) at 140 ℃ vulcanizers and make rubber item.
Embodiment 3
In the synthetic rubber of 1 kilogram natural rubber and 1 kilogram, with other Synergist S-421 95, in mixing process, add the phosphatidylserines of 2 grams, mixingly evenly make rubber item by sulfuration.
Natural rubber and synthetic rubber are also used in the rubber, and most synthetic rubber can both have good consistency with natural rubber, and combined effect is very good.And elastomeric kind is more, every kind of synthetic rubber and natural rubber and the same not to the utmost with the operational condition of glue, following take polyisoprene rubber and natural rubber also with the operation steps of glue as example.
Operation steps: two kinds of rubber are plasticated respectively park first, then make the broken-(down)rubber bag roller of natural rubber at mixing roll, the polyisoprene rubber broken-(down)rubber of adding 15% is mixed mutually, relax roll spacing until the remaining polyisoprene rubber broken-(down)rubber of even rear adding and refer and synthesize, until the intrinsic white of polyisoprene rubber disappears.Be sequentially added into vulcanization accelerator and phosphatidylserine, anti-aging agent, zinc oxide, stearic acid, various filler, after after a while mixing, add Sulfur, mix rear discharging until these Synergist S-421 95s, during the roller temperature control of mixing roll at 40 ℃-50 ℃.Through mixing rubber roll again, extrusion, moulding, vulcanize (the optimum curing time can be measured with vulkameter first) at 140 ℃ vulcanizers and make rubber item.
Embodiment 4
1 kilogram of natural rubber through preliminarily dried adds 1 phosphatidylserine that restrains at postprocessor, and the natural rubber of process aftertreatment is made caouttchouc through weighing, pressure bag.
Embodiment 5
1 kilogram of synthetic rubber through preliminarily dried adds 2 phosphatidylserines that restrain at rear drying machine (or postprocessor), and then weighing, pressure bag are made the synthetic rubber rubber.
Set forth a lot of details so that fully understand the present invention in the top description, still, the present invention can also adopt other to be different from other modes described here and implement, and therefore, can not be interpreted as limiting the scope of the invention.
In a word; although the present invention has exemplified above-mentioned preferred implementation, should illustrate, although those skilled in the art can carry out various variations and remodeling; unless such variation and remodeling have departed from scope of the present invention, otherwise all should be included in protection scope of the present invention.
Claims (7)
1. the application of phosphatidylserine aspect the vulcanization of rubber and anti-aging is characterized in that: phosphatidylserine is as a kind of novel thiofide and/or anti-aging agent.
2. the application of phosphatidylserine according to claim 1 aspect the vulcanization of rubber and anti-aging is characterized in that: add phosphatidylserine in rubber preliminary working process, the add-on of phosphatidylserine accounts for 0.01%-1% of rubber gross weight.
3. the application of phosphatidylserine according to claim 1 aspect the vulcanization of rubber and anti-aging is characterized in that: add phosphatidylserine in the rubber item production process, the add-on of phosphatidylserine accounts for 0.01%-1% of rubber gross weight.
4. the application of phosphatidylserine according to claim 2 aspect the vulcanization of rubber and anti-aging is characterized in that: behind the rubber preliminarily dried, add phosphatidylserine when aftertreatment, the rubber of process aftertreatment is made rubber raw rubber through weighing, pressure bag.
5. the application of phosphatidylserine according to claim 3 aspect the vulcanization of rubber and anti-aging is characterized in that: add phosphatidylserine in rubber mixing process, mixingly evenly make rubber item by sulfuration.
6. according to claim 1, the application of the described phosphatidylserine of 2,3 any one aspect the vulcanization of rubber and anti-aging, it is characterized in that: described phosphatidylserine is biochemical SILVER REAGENT or pharmaceutical grade or food grade or technical grade.
7. according to claim 1, the application of the described phosphatidylserine of 2,3 any one aspect the vulcanization of rubber and anti-aging, it is characterized in that: described rubber is natural rubber or synthetic rubber or mixed rubber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210359222.3A CN102850591B (en) | 2012-09-25 | 2012-09-25 | Application of phosphatidylserine in rubber vulcanization and anti-aging |
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| CN201210359222.3A CN102850591B (en) | 2012-09-25 | 2012-09-25 | Application of phosphatidylserine in rubber vulcanization and anti-aging |
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| CN102850591A true CN102850591A (en) | 2013-01-02 |
| CN102850591B CN102850591B (en) | 2014-07-23 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4289861A (en) * | 1975-12-27 | 1981-09-15 | Sanyo Trading Co., Ltd. | Curable rubber compositions with amino acids |
| CN102112538A (en) * | 2008-06-30 | 2011-06-29 | 倍耐力轮胎股份公司 | Tyre and crosslinkable elastomeric composition comprising an oxetane derivative and an amino acid |
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2012
- 2012-09-25 CN CN201210359222.3A patent/CN102850591B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4289861A (en) * | 1975-12-27 | 1981-09-15 | Sanyo Trading Co., Ltd. | Curable rubber compositions with amino acids |
| CN102112538A (en) * | 2008-06-30 | 2011-06-29 | 倍耐力轮胎股份公司 | Tyre and crosslinkable elastomeric composition comprising an oxetane derivative and an amino acid |
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| CN102850591B (en) | 2014-07-23 |
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Granted publication date: 20140723 Termination date: 20200925 |