CN104774355A - Water lubricated rubber composition and water lubricated rubber bearing produced from water lubricated rubber composition - Google Patents
Water lubricated rubber composition and water lubricated rubber bearing produced from water lubricated rubber composition Download PDFInfo
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- CN104774355A CN104774355A CN201410014427.7A CN201410014427A CN104774355A CN 104774355 A CN104774355 A CN 104774355A CN 201410014427 A CN201410014427 A CN 201410014427A CN 104774355 A CN104774355 A CN 104774355A
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Abstract
The present invention provides a water lubricated rubber composition and a water lubricated rubber bearing produced from the water lubricated rubber composition, wherein the water lubricated rubber composition can be used for preparing mold pressing vulcanization molding product, is particularly suitable as the material for preparing the water lubricated rubber bush of the water lubricated rubber bearing, and concretely comprises EIR, or a mixture of EIR and NBR, zinc oxide, sulfur, stearic acid, an accelerator, an anti-aging agent, a lubricant, carbon black, and an anti-wear agent. According to the present invention, the rubber composition contains EIR, and the epoxy group is introduced into the EIR molecular chain so as to provide excellent performances of high air tightness, high oil resistance, good adhesion, low heat generation, compatibility and the like; and the prepared water lubricated rubber bearing has performances of good friction resistance, good abrasion resistance, oil resistance and the like, and can replace the widely used water lubricated rubber bearing material NBR so as to expand the application field of EIR.
Description
Technical field
The present invention relates to rubber-supporting bearing technical field, the water lubricated rubber bearing being a kind of water lubricating rubber composition specifically and making of it.
Background technology
For a long time, the bearing friction in marine propuision system is secondary mainly with hardware composition, with mineral oil as lubricant medium (oil-lubricated bearing).Not only consume the resources such as a large amount of mineral oil and noble metal, and for preventing oil leakage from needing to carry out complicated sealing, this friction making marine propuision system produce in mechanical transmission course, wearing and tearing, vibration, impact, noise and idle energy consumption are difficult to reduce; The poor reliability of marine propuision system and the life-span is shorter etc. that problem can not get good solution, is particularly difficult to the problem overcoming oil leakage and polluted water environment.
Water has pollution-free, the feature such as wide, energy-conservation, safe of originating as lubricant medium, and rubber has the performances such as high vibration damping, easily processing, friction resistant and antifatigue.Utilize rubber alternative metals component secondary as bearing friction, water consumption substitution mineral oil is as lubricant medium (water lubricated rubber bearing), the wearing and tearing that the bearing friction pair that fundamentally can solve hardware composition exists are large, vibration is strong, high, the idle energy consumption of noise is high, poor reliability and the life-span is shorter and the series of problems such as oil leaking pollution, meet Economic Sustainability and eco-friendly demand for development.
At present, the rubber used in water lubricated rubber bearing, be mainly paracril (NBR), as the BTC water lubricated rubber bearing (water lubricating dynamic sealing composite rubber bearing) of University Of Chongqing's exploitation, be matrix with NBR, add a class rubber [water lubricating dynamic sealing rubber alloy bearing, the Chinese invention patent of the preparations such as various weighting agent, promotor, 200510057204.X, 2005; Water lubricating rubber alloy bearing, Chinese invention patent, 200810070089.3,2008], there is excellent performance, obtain application.But its body material NBR's is expensive, limits and applies more widely.
Epoxidation polyisoprene rubber (EIR) there is no application precedent in the preparation of water lubricated rubber bearing.Owing to introducing epoxide group on molecular chain, make it have the features such as excellent oil-proofness, resistance to air loss, binding property, low-heat-generation and consistency, its oil-proofness is close to NBR, and heat generation, lower than NBR, is compared NBR simultaneously and had obvious price advantage.If EIR can be adopted to prepare water lubricated rubber bearing, substitute now widely used water lubricated rubber bearing material NBR, will the range of application of EIR be widened, will the cost reducing water lubricated rubber bearing be conducive to.
Summary of the invention
The water lubricated rubber bearing that the object of the present invention is to provide a kind of water lubricating rubber composition and make of it, adopts all or part of alternative now widely used water lubricated rubber bearing material NBR of EIR, expands the Application Areas of EIR.
For reaching above object, the technical scheme that the present invention takes is:
A kind of water lubricating rubber composition, is characterized in that comprising following component:
Epoxidation polyisoprene rubber EIR, or the mixture 100phr of epoxidation polyisoprene rubber EIR and paracril NBR,
Zinc oxide 2.0 ~ 10.0phr,
Sulphur 0.5 ~ 3.0phr,
Stearic acid 0.5 ~ 2.0phr,
Promotor 0.5 ~ 3.0phr,
Anti-aging agent 1.0 ~ 3.0phr,
Lubricant 2.0 ~ 20.0phr,
Carbon black 50 ~ 100phr,
Anti-wear agent 0 ~ 70phr.
On the basis of technique scheme, in the mixture of epoxidation polyisoprene rubber EIR and paracril NBR, count EIR/NBR=99/1 ~ 50/50 in mass ratio.
On the basis of technique scheme, described EIR is one of any in epoxidation lithium system polyisoprene rubber, epoxidation titanium system polyisoprene rubber, epoxy natural rubber, epoxidation rare-earth isoprene rubber.
On the basis of technique scheme, the epoxidation degree of described EIR is 10% ~ 50%.
On the basis of technique scheme, the epoxidation degree of described EIR is 30% ~ 40%.
On the basis of technique scheme, in described NBR, acrylonitrile content is 15 ~ 50%.
On the basis of technique scheme, described promotor is: one or more in N cyclohexyl 2 benzothiazole sulfenamide, the N-tertiary butyl-2-[4-morpholinodithio time Huang, tetramethyl-thiuram disulfide, 2-benzothiazolyl mercaptan, dibenzothiazyl disulfide.
On the basis of technique scheme, described anti-aging agent is: one or more in N-phenyl-naphthylamines, 2,2,4-trimethylammonium-1,2-dihyaroquinoline polymers, N-sec.-propyl-4-aminodiphenylamine.
On the basis of technique scheme, described lubricant is: one or more in coumarone, Stockholm tar.
On the basis of technique scheme, described carbon black is: any one in super abrasion furnace black, medium super abrasion furnace black, high abrasion furnace black(HAF), general purpose furnace black and semi-reinforcing furnace black.
On the basis of technique scheme, described anti-wear agent is: any one in molybdenumdisulphide, graphite, tetrafluoroethylene, carbon fiber.
A molded vulcanization products formed prepared by above-mentioned one of arbitrarily described water lubricating rubber composition, is characterized in that: described water lubricating rubber composition is prepared as molded vulcanization products formed through molded vulcanization is shaping.
On the basis of technique scheme, it is used as water lubricating rubber lining.
On the basis of technique scheme, described water lubricating rubber lining is the lining of overall sulfuration type water lubricated rubber bearing.
On the basis of technique scheme, the processing parameter of water lubricating rubber composition molded vulcanization is: forming pressure is 10 ~ 100MPa, curing temperature is 120 ~ 190 DEG C, curing time is 30 ~ 90min.
The invention provides a kind of rubber combination comprising epoxidation polyisoprene rubber, due to EIR molecular chain introducing epoxide group, make it have the excellent properties such as high-air-tightness, high oil-proofness, good binding property, low-heat-generation and consistency.The water lubricated rubber bearing adopting rubber combination of the present invention to prepare, has good rub resistance, abrasion performance, resistance to wet goods performance, can substitute now widely used water lubricated rubber bearing material NBR, expands the Application Areas of EIR.
Embodiment
Core concept of the present invention is: adopt the alternative now widely used water lubricated rubber bearing material NBR that EIR is all or part of.Due to EIR molecular chain introducing epoxide group, make it have the excellent properties such as high-air-tightness, high oil-proofness, good binding property, low-heat-generation and consistency, its oil-proofness is close to NBR, and heat generation is lower than NBR, and price is lower than NBR, not yet there is application in water lubricated rubber bearing field.
Water lubricating rubber composition of the present invention, is characterized in that comprising following component:
Epoxidation polyisoprene rubber EIR, or the mixture 100phr of epoxidation polyisoprene rubber EIR and paracril NBR,
Zinc oxide 2.0 ~ 10.0phr,
Sulphur 0.5 ~ 3.0phr,
Stearic acid 0.5 ~ 2.0phr,
Promotor 0.5 ~ 3.0phr,
Anti-aging agent 1.0 ~ 3.0phr,
Lubricant 2.0 ~ 20.0phr,
Carbon black 50 ~ 100phr,
Anti-wear agent 0 ~ 70phr.
Described phr is parts per hundreds of rubber(or resin) abbreviation, represent the number that every 100 parts of (in mass) rubber (or resin) are added.
Described water lubricating rubber composition can be prepared as molded vulcanization products formed through molded vulcanization is shaping by the present invention.
This molded vulcanization products formed can be used as water lubricating rubber lining.
Further, described water lubricating rubber lining is the lining of overall sulfuration type water lubricated rubber bearing.Described overall sulfuration type water lubricated rubber bearing comprises bearing outer ring and water lubricating rubber lining, and described water lubricating rubber lining is shaping by molded vulcanization, and is assemblied in bearing outer ring internal surface, forms water lubricated rubber bearing.Such as: each component of water lubricating rubber composition mixes on conventional rubber mixing equipment, then sulfidization molding on moulding press.
The processing parameter of material molded vulcanization is: forming pressure is 10 ~ 100MPa, curing temperature is 120 ~ 190 DEG C, curing time is 30 ~ 90min.The concrete technology details of molded vulcanization can be implemented by existing known technology, no longer describes in detail.
On the basis of technique scheme, in the mixture of epoxidation polyisoprene rubber EIR and paracril NBR, count EIR/NBR=99/1 ~ 50/50 in mass ratio.
On the basis of technique scheme, described EIR is one of any in epoxidation lithium system polyisoprene rubber, epoxidation titanium system polyisoprene rubber, epoxy natural rubber, epoxidation rare-earth isoprene rubber.
On the basis of technique scheme, the epoxidation degree of described EIR is 10% ~ 50%.The epoxidation degree of preferred EIR is 30% ~ 40%.
On the basis of technique scheme, in described NBR, acrylonitrile content is 15 ~ 50%.
On the basis of technique scheme, in water lubricating rubber composition, described promotor is: one or more (any one or two or more) in N cyclohexyl 2 benzothiazole sulfenamide (CZ), the N-tertiary butyl-2-[4-morpholinodithio time yellow (NS), tetramethyl-thiuram disulfide (TMTD), 2-benzothiazolyl mercaptan (M), dibenzothiazyl disulfide (DM).
On the basis of technique scheme, in water lubricating rubber composition, described anti-aging agent is: N-phenyl-naphthylamines (A, D), 2,2, one or more (any one or two or more) in 4-trimethylammonium-1,2-dihyaroquinoline polymer (RD), N-sec.-propyl-4-aminodiphenylamine (4010NA).
On the basis of technique scheme, in water lubricating rubber composition, described lubricant is: one or more (any one or two kinds of uses simultaneously) in coumarone, Stockholm tar.
On the basis of technique scheme, in water lubricating rubber composition, described carbon black is: any one in super abrasion furnace black, medium super abrasion furnace black, high abrasion furnace black(HAF), general purpose furnace black and semi-reinforcing furnace black.
On the basis of technique scheme, in water lubricating rubber composition, described anti-wear agent is: any one in molybdenumdisulphide, graphite, tetrafluoroethylene, carbon fiber.
It is below embodiment.
Water lubricated rubber bearing performance test conditions: loading ability of bearing pressure be 10 ~ 5000N, under rotating speed is 100 ~ 2000 turns/min, the abrasion of the water lubricated rubber bearing that test adopts component of the present invention, proportioning and preparation method to obtain and frictional behaviour.
Embodiment 1 ~ 5
The formula preparing water lubricating rubber lining is: EIR(epoxidation degree is 30%) 100phr, ZnO 5phr, S 1.5phr, stearic acid 1.0phr, CZ 0.7phr, RD 1.0phr, coumarone 5.0phr, intermediate super abrasion furnace black N220 60phr, 70phr, 80phr, 90phr, 100phr.Do not add anti-wear agent.
Rubber and mentioned reagent mix on rubber mixing equipment, forming pressure 25MPa, curing temperature 150 DEG C, under the condition of curing time 40min, molded vulcanization is shaping prepares water lubricated rubber bearing, then be assemblied in bearing outer ring internal surface, form water lubricated rubber bearing.
Performance test
Test condition is rotating speed 500r/min, load 500N, time 60min, and test result is as table 1-4.
Table 1 carbon black add-on is on the impact of elastomeric material hardness
Rubber-supporting bearing need have certain supporting capacity, namely needs certain hardness to protect friction pair.The shore hardness of general standard-required rubber-supporting bearing peculiar to vessel should between 70 to 80.As seen from Table 1, when adding 60phr, hardness is undesirable lower than 70, and carbon black add-on can meet bearing service requirements between 70-90phr.
Table 2 carbon black add-on is on the impact of rubber-supporting bearing wear hardness
Abrasion reflect the work-ing life of rubber-supporting bearing.As can be seen from Table 2, when the material using EIR as water lubricated rubber bearing, along with increasing of carbon black N220 add-on, abrasion rise to fragmentation, there is suitable add-on, and when 70-80phr, abrasion are lower.
Table 3 carbon black add-on is on the impact of rubber-supporting bearing frictional behaviour
Frictional coefficient is also important folding performance perameter in design bearing.As can be seen from table 3, when the material using EIR as water lubricated rubber bearing, along with increasing of carbon black N220 add-on, frictional coefficient rises, consistent with the impact of abrasion, there is suitable add-on, frictional coefficient when carbon black add-on is 70phr is 0.0264-0.0346, with the BTC water lubricating rubber suitable (0.025-0.045) based on NBR.
Embodiment 6 ~ 8
With embodiment 1 ~ 5, difference is that used EIR epoxidation degree is 40%.
Table 4 carbon black add-on is on the impact of rubber-supporting bearing wear hardness
Table 5 carbon black add-on is on the impact of rubber-supporting bearing frictional behaviour
Compare with embodiment 1, the EIR epoxidation degree of use improves, and is conducive to the improvement of friction and wear hardness.
Comparative example 1 ~ 4
With embodiment 1 ~ 5, difference is that used rubber is for NBR, and wherein its acrylonitrile content is 24%.
Table 6 carbon black add-on is on the impact of rubber-supporting bearing wear hardness
Under comparison sheet 2 and table 6 find identical conditions of mixture ratios, use the material that NBR is water lubricated rubber bearing suitable with abrasion when using EIR.
Table 7 carbon black add-on is on the impact of rubber-supporting bearing frictional behaviour
Under comparison sheet 3 and table 7 find identical conditions of mixture ratios, use the material that NBR is water lubricated rubber bearing suitable with frictional coefficient when using EIR.
Comparative example 5 ~ 7
With comparative example 1 ~ 4, difference is that in used NBR, acrylonitrile content is 35%.
Table 8 carbon black add-on is on the impact of rubber-supporting bearing wear hardness
Table 9 carbon black add-on is on the impact of rubber-supporting bearing frictional behaviour
Compare with comparative example 1 ~ 4, the NBR acrylonitrile content of use is 35%, is conducive to the improvement of friction and wear hardness.
Embodiment 9 ~ 11
With embodiment 1 ~ 5, difference is that used rubber is for EIR and NBR and use, and in NBR, acrylonitrile content is 24%.EIR/NBR with than being 80/20.
Table 10 carbon black add-on is on the impact of rubber-supporting bearing wear hardness
As can be seen from Table 10, EIR/NBR with than when using for 80:20, the abrasion performance of rubber-supporting bearing is suitable with the bearing property based on EIR.
Table 11 carbon black add-on is on the impact of rubber-supporting bearing frictional behaviour
As can be seen from Table 11, EIR/NBR with than when using for 80:20, the frictional behaviour of rubber-supporting bearing is suitable with the bearing property based on EIR.
Embodiment 12 ~ 14
Each amounts of components is with embodiment 1 ~ 5, and difference is that the add-on of carbon black N220 is 70phr, and molybdenumdisulphide add-on is 10phr, 30phr in addition.
Table 12 molybdenumdisulphide add-on is on the impact of elastomeric material hardness
As seen from Table 12, along with the increasing of add-on of molybdenumdisulphide, little on the hardness impact of material, bearing service requirements can be met.
Table 13 molybdenumdisulphide add-on is on the impact of rubber-supporting bearing wear hardness
As can be seen from Table 13, when adding the molybdenum dioxide of 10phr, the abrasion of bearing reduce about 70%.But when add-on increases to 30phr, abrasion raise.
Table 14 molybdenumdisulphide add-on is on the impact of rubber-supporting bearing frictional behaviour
As can be seen from Table 14, when adding molybdenum dioxide, the frictional behaviour of bearing obtains obvious improvement.
Embodiment 15 ~ 17
With embodiment 1 ~ 5, difference is that the carbon black used is Universal carbon black N660.
Table 15 carbon black add-on is on the impact of rubber-supporting bearing wear hardness
As can be seen from Table 15, when using Universal carbon black N660, the wear hardness of bearing slightly declines.
Table 16 carbon black add-on is on the impact of rubber-supporting bearing frictional behaviour
Comparison sheet 16 and table 3 find, when using Universal carbon black N660, the frictional behaviour of bearing slightly declines, suitable with the BTC water lubricating rubber based on NBR.
Embodiment 18
With embodiment 1 ~ 5, difference be that the formula preparing water lubricated rubber bearing is: S1.0phr, TMTD1.0phr, intermediate super abrasion furnace black N22070phr, other component and add-on constant.
Table 17 carbon black add-on is on the impact of rubber-supporting bearing wear hardness
Compare with embodiment 1 ~ 5, vulcanization system change affects little on the friction of rubber-supporting bearing and wear hardness.
In sum, EIR partially or completely can be substituted NBR and be applied in the preparation of water lubricated rubber bearing, the wear hardness obtained, frictional behaviour are suitable with it.By adding anti-wear agent molybdenum dioxide, wear hardness, frictional behaviour can be further enhanced.
The content be not described in detail in this specification sheets belongs to the known prior art of professional and technical personnel in the field.
Claims (15)
1. a water lubricating rubber composition, is characterized in that comprising following component:
Epoxidation polyisoprene rubber EIR, or the mixture 100phr of epoxidation polyisoprene rubber EIR and paracril NBR,
Zinc oxide 2.0 ~ 10.0phr,
Sulphur 0.5 ~ 3.0phr,
Stearic acid 0.5 ~ 2.0phr,
Promotor 0.5 ~ 3.0phr,
Anti-aging agent 1.0 ~ 3.0phr,
Lubricant 2.0 ~ 20.0phr,
Carbon black 50 ~ 100phr,
Anti-wear agent 0 ~ 70phr.
2. water lubricating rubber composition as claimed in claim 1, is characterized in that: in the mixture of epoxidation polyisoprene rubber EIR and paracril NBR, counts EIR/NBR=99/1 ~ 50/50 in mass ratio.
3. water lubricating rubber composition as claimed in claim 1, is characterized in that: described EIR is one of any in epoxidation lithium system polyisoprene rubber, epoxidation titanium system polyisoprene rubber, epoxy natural rubber, epoxidation rare-earth isoprene rubber.
4. water lubricating rubber composition as claimed in claim 1, is characterized in that: the epoxidation degree of described EIR is 10% ~ 50%.
5. water lubricating rubber composition as claimed in claim 4, is characterized in that: the epoxidation degree of described EIR is 30% ~ 40%.
6. water lubricating rubber composition as claimed in claim 1, is characterized in that: in described NBR, acrylonitrile content is 15 ~ 50%.
7. water lubricating rubber composition as claimed in claim 1, is characterized in that: described promotor is: one or more in N cyclohexyl 2 benzothiazole sulfenamide, the N-tertiary butyl-2-[4-morpholinodithio time Huang, tetramethyl-thiuram disulfide, 2-benzothiazolyl mercaptan, dibenzothiazyl disulfide.
8. water lubricating rubber composition as claimed in claim 1, is characterized in that: described anti-aging agent is: one or more in N-phenyl-naphthylamines, 2,2,4-trimethylammonium-1,2-dihyaroquinoline polymers, N-sec.-propyl-4-aminodiphenylamine.
9. water lubricating rubber composition as claimed in claim 1, is characterized in that: described lubricant is: one or more in coumarone, Stockholm tar.
10. water lubricating rubber composition as claimed in claim 1, is characterized in that: described carbon black is: any one in super abrasion furnace black, medium super abrasion furnace black, high abrasion furnace black(HAF), general purpose furnace black and semi-reinforcing furnace black.
11. water lubricating rubber compositions as claimed in claim 1, is characterized in that: described anti-wear agent is: any one in molybdenumdisulphide, graphite, tetrafluoroethylene, carbon fiber.
Molded vulcanization products formed prepared by 12. 1 kinds of described water lubricating rubber compositions that one of use claim 1 ~ 11 any, is characterized in that: described water lubricating rubber composition is prepared as molded vulcanization products formed through molded vulcanization is shaping.
13. molded vulcanization products formeds as claimed in claim 12, is characterized in that: it is used as water lubricating rubber lining.
14. molded vulcanization products formeds as claimed in claim 13, is characterized in that: described water lubricating rubber lining is the lining of overall sulfuration type water lubricated rubber bearing.
15. molded vulcanization products formeds as claimed in claim 12, is characterized in that: the processing parameter of water lubricating rubber composition molded vulcanization is: forming pressure is 10 ~ 100MPa, curing temperature is 120 ~ 190 DEG C, curing time is 30 ~ 90min.
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| CN105440360A (en) * | 2015-12-16 | 2016-03-30 | 宁国市开源橡塑汽车零部件有限公司 | High/low temperature resistant oil-insulation sealing member material and preparation method thereof |
| CN110527155A (en) * | 2019-08-23 | 2019-12-03 | 陕西特种橡胶制品有限公司 | A kind of nuclear power circulating pump bearing shell hard wear rubber |
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| CN104774355B (en) | 2017-05-24 |
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