CN103642097B - A kind of preparation method of the nitrile rubber for preparing high abrasion float grease seal sealing ring - Google Patents
A kind of preparation method of the nitrile rubber for preparing high abrasion float grease seal sealing ring Download PDFInfo
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Abstract
For preparing the preparation method of the nitrile rubber of high abrasion float grease seal sealing ring, including formula and preparation technology, formula includes following components: nitrile rubber, N 550 white carbon black, high wear-resistant carbon black, semi-reinforcing hydrocarbon black, calcium carbonate, polrvinyl chloride, stearic acid, dibutyl ester, sulfur, accelerator, acceterator TE, Vulcanization accelerator TMTD, anti-aging agent RD, antioxidant 4010, zinc oxide；Preparation technology: adjust banbury temperature to 100 DEG C, rotating speed 32 revs/min, by rubber raw materials, fill up agent, softening agent, acidulant, age resistor and activating agent put into banburying 20 minutes in banbury, gelatin temperature control is binder removal below 130 DEG C, then moving to mill, slice cools down, it is thus achieved that masterbatch；Being put into by masterbatch in banbury, addition vulcanizing agent is mixing, banburying, and binder removal is to mill below 100 DEG C for gelatin temperature control, and then slice cools down, and stands ripening, it is thus achieved that for preparing the nitrile rubber of high abrasion float grease seal sealing ring.
Description
Technical field
The present invention relates to the preparation method of a kind of nitrile rubber, particularly relate to the preparation method of a kind of nitrile rubber for preparing high abrasion float grease seal sealing ring.
Background technology
The sealing principle of float grease seal is: two floating rings be compressed axially by O RunddichtringO after deformation, the generation thrust to floating-ring seal end face.Along with the uniform wear of seal face, this elastic energy stored by O-ring seals progressively discharges, thus plays nose balance effect.Therefore, in real work, it is desirable to 0 RunddichtringO has the strongest tensile property, impact flexibility and wearability.
The test data of float grease seal sealing ring of the prior art is following (wherein test condition is draw speed: 500mm/min, LL0:25mm):
As seen from the above table, institute's test specimens also not up to 300% is surely stretched and has been ruptured, and product can not meet the demand of O RunddichtringO.
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that the preparation method of a kind of nitrile rubber for preparing high abrasion float grease seal sealing ring, the nitrile rubber prepared by the method has the strongest tensile property and impact flexibility.
In order to solve above-mentioned technical problem, the present invention is addressed by following technical proposals: the preparation method of a kind of nitrile rubber for preparing high abrasion float grease seal sealing ring, including formula and preparation technology, it is characterised in that: described formula includes following components:
Rubber raw materials: nitrile rubber 15～20 parts；
Fill up agent: N-550 white carbon black 3～8 parts, high wear-resistant carbon black 1～5 parts, semi-reinforcing hydrocarbon black 5～10 parts, calcium carbonate 1～3 parts；
Softening agent: polrvinyl chloride 0.3～0.5 part, stearic acid 0.2～0.5 part, dibutyl ester 1～10 parts；
Acidulant: sulfur 0.1～0.5 part, altax 0.1～0.5 part, acceterator TE 0.1～0.5 part, Vulcanization accelerator TMTD 0.1～0.2 part；
Age resistor: anti-aging agent RD 0.1～0.5 part, antioxidant 4010 0.1～0.5 part；
Activating agent: zinc oxide 0.5～2 parts, said components is all in terms of parts by weight；
Described preparation technology comprises the following steps: step one, adjustment banbury temperature are to 100 DEG C, rotating speed 32 revs/min, by rubber raw materials, fill up banburying 20 minutes in agent, softening agent, acidulant, age resistor and activating agent input banbury, gelatin temperature control is binder removal below 130 DEG C, then mill is moved to, slice cools down, it is thus achieved that masterbatch is stand-by；
Step 2, masterbatch is put in banbury, add vulcanizing agent 0.6～0.8 part, carry out mixing, banburying 2 minutes, gelatin temperature control below 100 DEG C binder removal to mill, slice cooling the most on a mill until, standing ripening 8～240 hours, it is thus achieved that for preparing the nitrile rubber of high abrasion float grease seal sealing ring.
As preferably, described nitrile rubber 18 parts, N-550 white carbon black 5 parts, high wear-resistant carbon black 2 parts, semi-reinforcing hydrocarbon black 9 parts, calcium carbonate 1 part, polrvinyl chloride 0.4 part, stearic acid 0.3 part, dibutyl ester 8 parts, 0.1 part of sulfur, altax 0.4 part, acceterator TE 0.3 part, Vulcanization accelerator TMTD 0.12 part, anti-aging agent RD 0.3 part, antioxidant 4010 0.2 part, zinc oxide 1 part.
As preferably, the vulcanizing agent in step 2 is 0.72 part.
In the formula of the present invention, N550 white carbon black is fast extruding furnace black, and particle surface is smooth, and structure is higher, is a kind of product having medium reinforcing property concurrently and having fine processing characteristics, particularly gives sizing material higher very property and good tubeability.Its reinforcing property is higher than other soft carbon, and anti-wear performance is not worse than channel black, therefore also known as MAF medium abrasion furnace black.The resistance to elevated temperatures of sizing material and heat conductivility are good, particularly elastic good with restoration.Therefore, add N-550 white carbon black, improve the wearability of nitrile rubber, elasticity and restoration.Add high wear-resistant carbon black, improve the hot strength of nitrile rubber, tearing strength, wear-resisting and ageing properties simultaneously.Add semi-reinforcing hydrocarbon black, give sizing material high elongation rate, low-heat-generation, high resiliency and good ageing-resistant performance etc..Calcium carbonate, as a kind of novel solid filler, is filled with in rubber, can increase the volume of rubber, saves expensive natural rubber and synthetic rubber, reduces production cost.And due to the addition of calcium carbonate so that rubber is easier to mixing, and processing characteristics and model flow are good.Polrvinyl chloride has excellent resistance to low temperature, and chemical stability is good, is resistant to the erosion of most of soda acid, adds polrvinyl chloride in formula, improves resistance to low temperature and the decay resistance of nitrile rubber.Stearic acid adds in formula as emulsifying agent, and mixing thing can be made more stable.Dibutyl ester, as the plasticizer of nitrile rubber, increases the pliability of nitrile rubber, increases the elongation at break of nitrile rubber, reduces the processing and forming temperature of nitrile rubber, improves the impact property of nitrile rubber, reduces the case hardness of nitrile rubber.Add altax, improve the resistance to ag(e)ing of nitrile rubber.Add acceterator TE, not only make accelerator but also make vulcanizing agent, it addition, the anti-incipient scorch of acceterator TE is excellent, process safety.Vulcanization accelerator TMTD, acts on jointly with zinc oxide, and sulfuration promotion power is the strongest.Anti-aging agent RD, splendid to heat and the aging protection effect that causes of oxygen, but poor to subduing aging protection effect, and antioxidant 4010: to empty air and heat with subdue and aging have protective action, the deficiency of anti-aging agent RD can be made up.Therefore, by anti-aging agent RD and antioxidant 4010 use, to empty air and heat with subdue and aging have splendid protective action, it addition, antioxidant 4010 also has the effect of sclerosing agent.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail:
EmbodimentA kind of preparation method of the nitrile rubber for preparing high abrasion float grease seal sealing ring, including formula and preparation technology, described formula includes following components:
Rubber raw materials: nitrile rubber 18 parts；
Fill up agent: N-550 white carbon black 5 parts, high wear-resistant carbon black 2 parts, semi-reinforcing hydrocarbon black 9 parts, calcium carbonate 1 part；
Softening agent: polrvinyl chloride 0.4 part, stearic acid 0.3 part, dibutyl ester 8 parts；
Acidulant: 0.1 part of sulfur, altax 0.4 part, acceterator TE 0.3 part, Vulcanization accelerator TMTD 0.12 part；
Age resistor: anti-aging agent RD 0.3 part, antioxidant 4010 0.2 part；
Activating agent: zinc oxide 1 part, said components is all in terms of parts by weight；
Described preparation technology comprises the following steps: step one, adjustment banbury temperature are to 100 DEG C, rotating speed 32 revs/min, by rubber raw materials, fill up banburying 20 minutes in agent, softening agent, acidulant, age resistor and activating agent input banbury, gelatin temperature control is binder removal below 130 DEG C, then mill is moved to, slice cools down, it is thus achieved that masterbatch is stand-by；
Step 2, masterbatch is put in banbury, add vulcanizing agent 0.72 part, carry out mixing, banburying 2 minutes, gelatin temperature control below 100 DEG C binder removal to mill, slice cooling the most on a mill until, standing ripening 8～240 hours, it is thus achieved that for preparing the nitrile rubber of high abrasion float grease seal sealing ring.
The nitrile rubber performance detection prepared according to above-mentioned formula and preparation method is following (wherein test condition is draw speed: 500mm/min, LL0:25mm):
As seen from the above table, this test sample elongation at break is all more than 400%, it was demonstrated that the tensile property of this nitrile rubber is greatly improved than in prior art.
In a word, the foregoing is only presently preferred embodiments of the present invention, all impartial changes made according to scope of the present invention patent and modification, all should belong to the covering scope of patent of the present invention.
Claims (1)
1., for preparing the preparation method of nitrile rubber for high abrasion float grease seal sealing ring, including formula and preparation technology, described formula includes following components:
Rubber raw materials: nitrile rubber 18 parts；
Fill up agent: N-550 white carbon black 5 parts, high wear-resistant carbon black 2 parts, semi-reinforcing hydrocarbon black 9 parts, calcium carbonate 1 part；
Softening agent: polrvinyl chloride 0.4 part, stearic acid 0.3 part, dibutyl ester 8 parts；
Acidulant: 0.1 part of sulfur, altax 0.4 part, acceterator TE 0.3 part, Vulcanization accelerator TMTD 0.12 part；
Age resistor: anti-aging agent RD 0.3 part, antioxidant 4010 0.2 part；
Activating agent: zinc oxide 1 part, said components is all in terms of parts by weight；
Described preparation technology comprises the following steps: step one, adjustment banbury temperature are to 100 DEG C, rotating speed 32 revs/min, by rubber raw materials, fill up banburying 20 minutes in agent, softening agent, acidulant, age resistor and activating agent input banbury, gelatin temperature control is binder removal below 130 DEG C, then mill is moved to, slice cools down, it is thus achieved that masterbatch is stand-by；
Step 2, masterbatch is put in banbury, add vulcanizing agent 0.72 part, carry out mixing, banburying 2 minutes, gelatin temperature control below 100 DEG C binder removal to mill, slice cooling the most on a mill until, standing ripening 8～240 hours, it is thus achieved that for preparing the nitrile rubber of high abrasion float grease seal sealing ring；
Described nitrile rubber width is 6.00mm, when thickness is respectively 2.02,2.06 and 2.10mm, it 100% stretches respectively 1.95MPa, 1.95MPa and 2.06MPa surely, 300% stretches respectively 6.82MPa, 6.77MPa and 6.72MPa surely, elongation at break is respectively 426.03%, 431.64% and 432.0%, and ultimate strength is respectively 8.875MPa, 8.891MPa and 8.887MPa.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108822359A (en) * | 2018-07-23 | 2018-11-16 | 安徽立信橡胶科技有限公司 | A kind of modified butadiene acrylonitrile rubber formula |
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| CN116285038A (en) * | 2023-03-21 | 2023-06-23 | 马鞍山宏力橡胶制品有限公司 | Slewing bearing nitrile-butadiene sealing ring sizing material and application thereof |
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