CN103724707A - Prestressed reinforced concrete pipe sealing ring - Google Patents
Prestressed reinforced concrete pipe sealing ring Download PDFInfo
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- CN103724707A CN103724707A CN201310745340.2A CN201310745340A CN103724707A CN 103724707 A CN103724707 A CN 103724707A CN 201310745340 A CN201310745340 A CN 201310745340A CN 103724707 A CN103724707 A CN 103724707A
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- reinforced concrete
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Abstract
The invention provides a high-performance prestressed reinforced concrete pipe sealing ring which has the characteristics of excellent tensile strength at break, elongation at break, compression permanent deformation and the like. The prestressed reinforced concrete pipe sealing ring designed by the invention has a unique glue material formula, and comprises the following main components in percentage by mass: 45-55% of natural rubber, 15-25% of N330 carbon black, 10-20% of CC (calcium carbonate) powder, 3-5 parts of solid coumarone resin, 4-6% of naphthenic oil, 2-2.5% of zinc oxide (99.7%), 1.5-2.3% of stearic acid 1801, 0.2-0.6% of anti-aging agent 2246, 0.2-0.4% of paraffin, 0.3-0.7% of polyethylene glycol PEB4000, and an accelerant and a vulcanizing agent, wherein the accelerant and a vulcanizing agent include 0.05-0.15% of M (2-mercaptobenzothiazole), 0.4-0.6% of DTDM ( 4,4'-dithiodimorpholine ), 0.05-0.15% of TMTD (tetramethylthiuram disulfide), 0.5-0.9% of CZ (N-cyclohexyl-2-benzothiazolylsulfenamide) and 0.2-0.4% of S. The prestressed reinforced concrete pipe sealing ring has the performance indexes as follows: the minimum elongation at break reaches 400%, the minimum tensile strength reaches 18.6MPa, the strength is more than or equal to 21mPa, the specific elongation is more than or equal to 500%, and the pressure deformation is less than or equal to 15%.
Description
Technical field
The present invention relates to rubber seal technical field, be specifically related to a kind of prestressed reinforced concrete pipe sealing-ring.
Background technology
Prestressed reinforced concrete pipe, English name Prestressed Concrete Cylinder Pipe, referred to as PCCP, be that a kind of antiseepage by the tension of High Tensile Steel Wire, concrete resistance to compression and steel plate organically combines, sufficiently and reasonably utilized the water delivery tubing of the high-quality of material physico mechanical characteristic separately.PCCP is take hydromechanics, soil mechanics and Materials science as basis, in material of construction long-term production, test, the use procedures such as steel concrete, quality improves constantly, quality is continued to optimize, and grow up on the increasingly mature basis of prestressed concrete technology.
The life-time service experience of developed countries and the countless practices of developing country's Rapid Popularization have proved that prestress PCCP is a kind of excellent property, rising multi-usage tubing.The development prospect of China PCCP production application is very bright---and China is that a water resources lacks and the serious unbalanced country that distributes relatively, along with the fast development of economic society, on the south the water north water resources that is adjusted to sign distribute, draw on a large scale water transfer rationally and pulled open prelude.Along with the enhancing of china's overall national strength and the raising day by day of environmental protection consciousness, adopt sealing, pressure conduit water delivery will become the main flow of development.And PCCP sealing-ring seals for concrete pipe interface, the rubber seal of producing take rubber as base material, require rubber to there is the snappiness polymkeric substance of reversible deformation, i.e. at high temperature high resilience, under very little External Force Acting, can produce larger distortion, remove resilient after external force, thereby play excellent sealing function.Prestressed reinforced concrete pipe sealing-ring can not be despised on the impact of PCCP performance.
For the sealing-ring in prestressed reinforced concrete pipe road, due to the larger reason of goods, the vulcanization rate of product is had to larger requirement, simultaneously as engineering product, to the basic physical properties of product itself, such as: the performance requriementss such as tensile strength at yield, tensile yield, compression set are comparatively strict, based on above technique and basic physical properties two requirement easily, poor for the product performance that cause due to factors such as formulating of recipe are unreasonable in prior art, the present invention intends providing a kind of high performance prestressed reinforced concrete pipe sealing-ring.
Summary of the invention
Requirement for the prestressed reinforced concrete pipe sealing-ring of existing use to performance, the present invention intends developing a kind of sizing compound formula that can greatly improve sealing-ring performance, obtains a kind of high performance prestressed reinforced concrete pipe sealing-ring.
The object of the invention is to by changing sizing compound formula, by adding vulcanizing agent and vulcanization accelerator, obtain the prestressed reinforced concrete pipe sealing-ring that a kind of minimum tensile yield reaches 400%, minimum tensile strength reaches 18.6MPa.
Prestressed reinforced concrete pipe sealing-ring selection standard level natural rubber of the present invention, foreign matter content is minimum, physicals excellence; Guarantee constant product quality.
N330 carbon black is supporting material in formula, and the physical property of product is had greatly improved; The N330 carbon black of selecting U.S. Cabot Co.,Ltd to produce, reinforcing property excellence, steady quality, to meeting, to change the environmental requirement of aromatic hydrocarbon (PAHS) secure more simultaneously.
Solid coumarone resin is tenderizer, alone naphthenic oil consumption is too large, affect the physicals of product, use solid coumarone resin not only to reduce hardness but also can gain in strength, increase the compatible degree of each Synergist S-421 95 in the viscosity of product and formula simultaneously, significantly improve elastomeric viscosity, reduce the peeling after sulfuration; Plasticization effect is good, and the half-finished surface quality that improve calendering, extrudes, becomes easily complete processing, improves the degree of scatter of carbon black in sizing material.Solid coumarone resin contains phenolic group, so can improve the ageing-resistant performance of sizing material; The more raised reinforcement of arriving of softening temperature is better, and compressive strength, tear strength, flexibility all increase.
CC powder is the one of calcium carbonate, in formula as weighting agent, mainly for reducing costs, the simultaneously as far as possible less performance that affects product, consumption is controlled at 10wt%-20wt%.Select through lipid acid surface modified calcium carbonate (calcene CC powder), this materials reinforcing performance is greater than conventional light calcium carbonate, after sulfuration, elongation, tear strength, the flex cracking resistance of product are all better than light calcium carbonate, have larger help in the complaisance of the installation to product, practicality, elasticity and work-ing life simultaneously.
Naphthenic oil, as the softening agent of this sizing compound formula, can effectively increase the distance of rubber molecule interchain, reduces the effect between molecular chain, and produce lubrication, and make easily to slide between molecular chain, improve the dispersing property of carbon black, mobility while increasing sulfidization molding, improves mixing and sulfidization molding technique; Simultaneously for adjusting the hardness of goods.Because the consistency of naphthenic oil and natural rubber is better, this naphthenic oil contaminative is little compared with aromatic hydrocarbon oil; Do not affect the thermal aging property of goods simultaneously, not volatile.
In sum, of the present inventionly provide a kind of high performance prestressed reinforced concrete pipe sealing-ring, its sizing compound formula is as follows:
Prestressed reinforced concrete pipe sealing-ring of the present invention, by natural gum, N330 carbon black, CC powder, solid coumarone resin and naphthenic oil group, be main component, add reactive systems and preventing aging system and the promotor being mixed by M+DTDM+TMTD+CZ being formed by zinc oxide, stearic acid 1801, antioxidant 2246, paraffin and polyoxyethylene glycol PEB4000 and vulcanizing agent S+DTDM is mixing forms simultaneously.
As the content of main component, be (mass percent wt%):
The content of promoting agent system is (mass percent wt%):
Zinc oxide (99.7%) 2-2.5
Stearic acid 1801 1.5-2.3
Polyoxyethylene glycol PEB4000 0.3-0.7
The content of preventing aging system is (mass percent wt%):
Antioxidant 2246 0.2-0.6
Paraffin 0.2-0.4
Promotor and vulcanizing agent content are (mass percent wt%):
As preferred version of the present invention, prestressed reinforced concrete pipe sealing-ring provided by the invention, is prepared from by the sizing material with following composition:
As the content of main component, be (mass percent wt%):
The content of promoting agent system is (mass percent wt%):
Zinc oxide (99.7%) 2-2.5
Stearic acid 1801 1.5-2.3
Polyoxyethylene glycol PEB4000 0.3-0.7
The content of preventing aging system is (mass percent wt%):
Antioxidant 2246 0.2-0.6
Paraffin 0.2-0.4
Promotor and vulcanizing agent content are (mass percent wt%):
Embodiment
Below the technical scheme in the embodiment of the present invention is carried out to clear, intactly description, obviously, described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Embodiment in inventing, all embodiment that those skilled in the art obtain under the prerequisite of not making creative work, belong to protection scope of the present invention.
Of the present inventionly provide a kind of high performance prestressed reinforced concrete pipe sealing, by natural gum, N330 carbon black, CC powder, solid coumarone resin and naphthenic oil group, be main component, add reactive systems and preventing aging system and the promotor being mixed by M+DTDM+TMTD+CZ being formed by zinc oxide, stearic acid 1801, antioxidant 2246, paraffin and polyoxyethylene glycol PEB4000 and vulcanizing agent S+DTDM is mixing forms simultaneously.
As the content of main component, be (mass percent wt%):
The content of promoting agent system is (mass percent wt%):
Zinc oxide (99.7%) 2-2.5
Stearic acid 1801 1.5-2.3
Polyoxyethylene glycol PEB4000 0.3-0.7
The content of preventing aging system is (mass percent wt%):
Antioxidant 2246 0.2-0.6
Paraffin 0.2-0.4
Promotor and vulcanizing agent content are (mass percent wt%):
The restriction reason of the compositing range to opticglass of the present invention describes, and as long as no special records, the content of each composition, total content represent with wt%.
Prestressed reinforced concrete pipe sealing-ring selection standard level natural rubber of the present invention, foreign matter content is minimum, physicals excellence; Guarantee constant product quality.
N330 carbon black is supporting material in formula, and the physical property of product is had greatly improved; The N330 carbon black of selecting U.S. Cabot Co.,Ltd to produce, reinforcing property excellence, steady quality, to meeting, to change the environmental requirement of aromatic hydrocarbon (PAHS) secure more simultaneously.
Solid coumarone resin is tenderizer, alone naphthenic oil consumption is too large, affect the physicals of product, use solid coumarone resin not only to reduce hardness but also can gain in strength, increase the compatible degree of each Synergist S-421 95 in the viscosity of product and formula simultaneously, significantly improve elastomeric viscosity, reduce the peeling after sulfuration; Plasticization effect is good, and the half-finished surface quality that improve calendering, extrudes, becomes easily complete processing, improves the degree of scatter of carbon black in sizing material.Solid coumarone resin contains phenolic group, so can improve the ageing-resistant performance of sizing material; The more raised reinforcement of arriving of softening temperature is better, and compressive strength, tear strength, flexibility all increase.
CC powder is the one of calcium carbonate, in formula as weighting agent, mainly for reducing costs, the simultaneously as far as possible less performance that affects product, consumption is controlled at 10wt%-20wt%.Select through lipid acid surface modified calcium carbonate (calcene CC powder), this materials reinforcing performance is greater than conventional light calcium carbonate, after sulfuration, elongation, tear strength, the flex cracking resistance of product are all better than light calcium carbonate, have larger help in the complaisance of the installation to product, practicality, elasticity and work-ing life simultaneously.
Naphthenic oil, as the softening agent of this sizing compound formula, can effectively increase the distance of rubber molecule interchain, reduces the effect between molecular chain, and produce lubrication, and make easily to slide between molecular chain, improve the dispersing property of carbon black, mobility while increasing sulfidization molding, improves mixing and sulfidization molding technique; Simultaneously for adjusting the hardness of goods.Because the consistency of naphthenic oil and natural rubber is better, this naphthenic oil contaminative is little compared with aromatic hydrocarbon oil; Do not affect the thermal aging property of goods simultaneously, not volatile.
Zinc oxide: promoting agent zinc oxide is main as vulcanization leveller in rubber, by the raising of its promotion rubber cross density, guarantees every physical and mechanical properties, helps the reflection of induction promotor, promotes to vulcanize.In sulfidation zinc oxide as promoting agent the surface that occurs in zinc oxide particle of reacting with organic promoter, stearic acid, sulphur etc.Because zinc oxide is good to the affine performance of electronics, the ability of adsorption enhancer is strong, generates and dissolves in the promotor zinc salt of sizing material, thereby improve its solubleness, and form a kind of complex compound of zinc with amine or lipid acid under stearic effect, makes promotor more active.Due to sulphur is added in complex compound, by induction activation, form very strong vulcanizing agent, in this process, zinc oxide particle surface constantly reacts simultaneously, and particle diameter constantly reduces, and consumes zinc oxide until sizing material tight cure.
Stearic acid: add as auxiliary material, sizing material is had to softening and plastification; Increase the mobility of sizing material, increase release property and prevent mold fouling, increase the abundant dispersion of carbon black, weighting agent and zinc oxide; Significantly reduce compound viscosity, improve processing performance, can significantly improve the plasticity-of sizing material; Improve sulfurate activity, play the effect of the second promotor; Can promote its activity with zinc oxide or basic-type accelerator reaction, or main vulcanization accelerator additive, can play the work of the second promotor, can make sclerosis accelerate.
Paraffin: physical antioxidant (environment-friendly type, environmentally safe); after product sulfuration, at product surface, form physics protective membrane; effectively prevent the infiltration loss of function of goods because of external environment (as daylight, bromine oxygen, ultraviolet ray etc.), thus the work-ing life of having improved product.
Antioxidant 2246: aldehydes oxidation inhibitor, environment-friendly type, environmentally safe), heat, oxygen, aging cracking are had to fabulous protective effect, especially to the rubber item under daylight is aging, played maximum protective benefits; Especially also use and can protect the infringement of the various factors such as weather to cross-linked rubber with paraffin, thereby greatly extended the work-ing life of product.
Polyoxyethylene glycol (PEG4000): properties-correcting agent, shielded surfaces hydroxyl, main and acid material effect, filler is not reunited, better dispersion, increases the consistency of filler and rubber, polarity and the nonpolar pulvis linking up in activation point powder formula, the impact of filler on sulfuration can be reduced or eliminated, goods case depth and vulcanization rate can be improved and accelerate.Can make various auxiliary agents be uniformly dispersed and extend time of scorch, improving the physical and mechanical properties of rubber item.There is good lubrication, make product surface more smooth.Non-volatile, not produce ash and become, it is clean that demoulding rear mold keeps.And pressing surface is also more level and smooth clean due to adding of it.
Captax: universal vulcanization accelerator, in formula, do the second promotor (environmental protection, nontoxic), can promote CZ by fast synergistic, TMTD promotes sulfur cross-linking; Sulfuration flatness is very wide, because the sulphur content in formula is lower, (be mainly DTDM+TMTD, in high temperature, divide and parse free sulphur, thereby sizing material is vulcanized), M has sulfuration to delay and the effect of anti-incipient scorch in sulfidation, increases security in sulfidation and the security of sizing material storage.Natural rubber is had to plastification (improve the mobility of cross-linked rubber and improve sulfuration process) simultaneously.
Vulcanization accelerator TMTD: ultra fast accelerator, in formula, do the second promotor, the collaborative DTDM of promotion promotes to vulcanize.Effect is fierce, can accelerate vulcanization rate; In TMTD high temperature, divide and parse free sulphur simultaneously, effective sulfur content 13.3%, is used Gu make again vulcanizing agent in formula, can reduce the consumption of sulphur, because decomposition temperature is lower, sulfuration process processing safety is bad, so use on a small quantity, be mainly used in the collaborative DTDM of promotion and promote sulfuration.Than common, all with sulfur cross-linking, the high temperature resistant of goods is very helpful, the physicals of goods is very helpful.
Vulkacit D TDM: ultra fast accelerator, in formula, do the second promotor, be again the second vulcanizing agent simultaneously.Can accelerate vulcanization rate; In high temperature, divide and parse free sulphur, effective sulfur content 33%, can effectively reduce the consumption of sulphur, because decomposition temperature is higher than TMTD, sulfuration process operability is than TMTD safety, so use (collaborative sulfur cross-linking) as the second promotor and vulcanizing agent in formula.Than common, all with sulfur cross-linking, the high temperature resistant of goods is very helpful, the physicals of goods is very helpful, adopt the cooperation system of high short low-sulfur, greatly improve goods cross-linking density, improve and press resistance performance thermal ageing resistant performance.
Accelerant CZ: general delayed action accelerator, in formula, do the first promotor and use (primary accelerator), have the good and two short large advantages of curing time of scorching quality concurrently, can improve stress at definite elongation and the tensile strength of vulcanized article, product installation suitability is very helpful.
S: vulcanizing agent, the linear molecule chain structure of rubber is at high temperature changed into measurements of the chest, waist and hips network molecule chain structure, thereby improve the various physicalies (as hardness, elasticity, tensile strength at yield, tensile yield etc.) of goods, improve the use value of goods; Owing to there being the collaborative sulfuration of vulkacit D TDM in formula, greatly reduced the consumption of sulphur.
Embodiment:
Prestressed reinforced concrete pipe sealing-ring provided by the invention, is prepared from by the sizing material with following composition:
As the content of main component, be (mass percent wt%):
The content of preventing aging system is (mass percent wt%):
Promotor and vulcanizing agent content are (mass percent wt%):
The new energy with prestressed reinforced concrete pipe sealing-ring prepared by this composition sizing material is as follows:
Claims (3)
1. prestressed reinforced concrete pipe sealing-ring, it is characterized in that: by natural gum, N330 carbon black, CC powder, solid coumarone resin and naphthenic oil group, be main component, add preventing aging system and the promotor being mixed by M+DTDM+TMTD+CZ that the activator that consists of zinc oxide, stearic acid 1801, polyoxyethylene glycol PEB4000 and antioxidant 2246, paraffin forms and vulcanizing agent S+DTDM is mixing forms simultaneously.
2. prestressed reinforced concrete pipe sealing-ring according to claim 1, is characterized in that:
As the content of main component, be (mass percent wt%):
The content of promoting agent system is (mass percent wt%):
Zinc oxide (99.7%) 2-2.5
Stearic acid 1801 1.5-2.3
Polyoxyethylene glycol PEB4000 0.3-0.7
The content of preventing aging system is (mass percent wt%):
Antioxidant 2246 0.2-0.6
Paraffin 0.2-0.4
Promotor and vulcanizing agent content are (mass percent wt%):
3. prestressed reinforced concrete pipe sealing-ring according to claim 2, is characterized in that:
As the content of main component, be (mass percent wt%):
The content of promoting agent system is (mass percent wt%):
Zinc oxide (99.7%) 2-2.5
Stearic acid 1801 1.5-2.3
Polyoxyethylene glycol PEB4000 0.3-0.7
The content of preventing aging system is (mass percent wt%):
Antioxidant 2246 0.2-0.6
Paraffin 0.2-0.4
Promotor and vulcanizing agent content are (mass percent wt%):
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310745340.2A CN103724707B (en) | 2013-12-31 | 2013-12-31 | Prestressed reinforced concrete pipe sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310745340.2A CN103724707B (en) | 2013-12-31 | 2013-12-31 | Prestressed reinforced concrete pipe sealing ring |
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| CN103724707A true CN103724707A (en) | 2014-04-16 |
| CN103724707B CN103724707B (en) | 2016-07-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105504377A (en) * | 2015-12-29 | 2016-04-20 | 无锡市青山铁路器材有限公司 | Rubber with high elongation at break |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1887945A (en) * | 2006-06-08 | 2007-01-03 | 南京东润特种橡塑有限公司 | Material for making composite water sealing and its prepn |
| WO2012080670A1 (en) * | 2010-12-15 | 2012-06-21 | Laviosa Mpc | Sealing product for plugging and sealing a fractured or cracked formation, and method and system for manufacturing such a product |
| CN103408806A (en) * | 2013-07-01 | 2013-11-27 | 芜湖市银鸿液压件有限公司 | Anti-fatigue ageing-resistant hydraulic sealing gasket and preparation method thereof |
| CN103450510A (en) * | 2012-05-31 | 2013-12-18 | 沈燕 | O-shaped seal ring |
| CN103450512A (en) * | 2012-05-31 | 2013-12-18 | 孙菊 | Production technology of seal ring |
-
2013
- 2013-12-31 CN CN201310745340.2A patent/CN103724707B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1887945A (en) * | 2006-06-08 | 2007-01-03 | 南京东润特种橡塑有限公司 | Material for making composite water sealing and its prepn |
| WO2012080670A1 (en) * | 2010-12-15 | 2012-06-21 | Laviosa Mpc | Sealing product for plugging and sealing a fractured or cracked formation, and method and system for manufacturing such a product |
| CN103450510A (en) * | 2012-05-31 | 2013-12-18 | 沈燕 | O-shaped seal ring |
| CN103450512A (en) * | 2012-05-31 | 2013-12-18 | 孙菊 | Production technology of seal ring |
| CN103408806A (en) * | 2013-07-01 | 2013-11-27 | 芜湖市银鸿液压件有限公司 | Anti-fatigue ageing-resistant hydraulic sealing gasket and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105504377A (en) * | 2015-12-29 | 2016-04-20 | 无锡市青山铁路器材有限公司 | Rubber with high elongation at break |
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| Publication number | Publication date |
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| CN103724707B (en) | 2016-07-06 |
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