CN103724707B - Prestressed reinforced concrete pipe sealing ring - Google Patents
Prestressed reinforced concrete pipe sealing ring Download PDFInfo
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- CN103724707B CN103724707B CN201310745340.2A CN201310745340A CN103724707B CN 103724707 B CN103724707 B CN 103724707B CN 201310745340 A CN201310745340 A CN 201310745340A CN 103724707 B CN103724707 B CN 103724707B
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Abstract
The present invention provides a kind of high performance prestressed reinforced concrete pipe sealing ring, has the feature of the excellent performances such as breaking strength, elongation at break, compression set.nullThe prestressed reinforced concrete pipe sealing ring sizing compound formula of the design is unique，When representing with mass percent，Comprise the content as main component for (mass percent wt%): natural gum is 45-55，N330 white carbon black is 15-25，CC powder is 10-20，Solid coumarone resin is 3-5，Naphthenic oil is 4-6，Zinc oxide 99.7% is 2-2.5，Stearic acid 1801 is 1.5-2.3，Antioxidant 2246 is 0.2-0.6，Paraffin is 0.2-0.4，Polyethylene Glycol PEG4000 is 0.3-0.7 and accelerator and vulcanizing agent content: M is 0.05-0.15，DTDM is 0.4-0.6，TMTD is 0.05-0.15，CZ is 0.5-0.9，S is 0.2-0.4.This prestressed reinforced concrete pipe sealing ring performance index is: minimum elongation at break reaches 400%, minimum tensile strength reaches 18.6MPa, intensity >=21mPa, percentage elongation >=500%, buckling≤15%.
Description
Technical field
The present invention relates to technical field of rubber seal, be specifically related to a kind of prestressed reinforced concrete pipe sealing ring.
Background technology
Prestressed reinforced concrete pipe, English name PrestressedConcreteCylinderPipe, referred to as PCCP, it is 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 make use of the water transferring line of the high-quality of the respective physico mechanical characteristic of material.PCCP is based on hydraulics, soil mechanics and material science, in construction material long-term production, test, the use procedures such as steel-concrete, quality improves constantly, quality is continued to optimize, and grow up on the basis that prestressed concrete technology is increasingly mature.
The life-time service experience of developed countries and oneself verified prestressing force PCCP of the countless practices of developing country's Rapid Popularization are a kind of function admirables, rising multipurpose tubing.Very bright China of development prospect of China's PCCP production application is that a water resource relatively lacks and is distributed serious unbalanced country, along with the fast development of economic society, on the south water north be adjusted to mark water resource optimal allocation, on a large scale draw water transfer oneself through having pulled open prelude.Along with the raising day by day of the enhancing of china's overall national strength and environmental protection consciousness, adopt close, pressure conduit water delivery will become the main flow of development.And PCCP sealing ring seals for pipe of concrete interface, with the rubber seal that rubber produces for base material, require that rubber has the strong flexible polymer of reversible deformation, i.e. at high temperature high resilience, bigger deformation can be produced under only small External Force Acting, resilient after removing external force, thus play excellent sealing function.The impact of PCCP performance can not be despised by prestressed reinforced concrete pipe sealing ring.
Sealing ring for prestressed reinforced concrete pipe road, due to the reason that goods are bigger, the curingprocess rate of product there is bigger requirement, simultaneously as engineering product, basic physical properties to product itself, such as: the performance requirements such as breaking strength, elongation at break, compression set are comparatively strict, based on process above and the convenient requirement of basic physical properties two, poor for the properties of product caused due to the formula design factor such as unreasonable in prior art, the present invention intends providing a kind of high performance prestressed reinforced concrete pipe sealing ring.
Summary of the invention
For the requirement to performance of the prestressed reinforced concrete pipe sealing ring of existing use, the present invention intends developing a kind of sizing compound formula that can significantly improve sealing ring performance, obtains a kind of high performance prestressed reinforced concrete pipe sealing ring.
It is an object of the invention to by changing sizing compound formula, obtain that a kind of minimum elongation at break reaches 400%, minimum tensile strength reaches the prestressed reinforced concrete pipe sealing ring of 18.6MPa by adding vulcanizing agent and vulcanization accelerator.
Prestressed reinforced concrete pipe sealing ring selection standard level natural rubber of the present invention, impurity content is minimum, excellent physical properties；Guarantee constant product quality.
N330 white carbon black is supporting material in formula, and the physical property of product is had greatly improved；Selecting the N330 white carbon black that Cabot Co., Ltd of the U.S. produces, reinforcing property is excellent, steady quality, simultaneously secure to meeting the environmental requirement changing aromatic hydrocarbon (PAHS) more.
Solid coumarone resin is softening agent, alone naphthenic oil consumption is too big, affect the physical property of product, solid coumarone resin is used not only to reduce hardness but also intensity can be increased, increase the compatible degree of each compounding ingredient in the viscosity of product and formula simultaneously, significantly improve elastomeric viscosity, reduce the peeling after sulfuration；Plasticization effect is good, improves calendering, the half-finished surface quality extruded so that processing technique becomes easy, improves white carbon black degree of scatter in sizing material.Solid coumarone resin contains phenolic group, it is possible to improve the ageing-resistant performance of sizing material；Softening point is more raised arrive reinforcing more good, compressive strength, tearing strength, flexibility all increase.
CC powder is the one of calcium carbonate, and as filler in formula, mainly for reducing cost, the less as far as possible performance affecting product simultaneously, consumption controls at 10wt%-20wt%.Select through fatty acid surface modified calcium carbonate (calcene CC powder), this materials reinforcing performance is more than conventional precipitated calcium carbonate, after sulfuration, the percentage elongation of product, tearing strength, flex cracking resistance are better than precipitated calcium carbonate, the contingency of the installation of product, practicality, elasticity and service life are had bigger help simultaneously.
Naphthenic oil, as the plasticizer of this sizing compound formula, can be effectively increased the distance of rubber molecule interchain, reduces the effect of molecule interchain, and produce lubrication, make easily to slide between strand, improve the dispersive property of white carbon black, increase mobility during sulfidization molding, improve mixing and sulfidization molding technique；It is simultaneously used for adjusting the hardness of goods.Owing to naphthenic oil is better with the compatibility of natural rubber, this naphthenic oil contaminative is little compared with aromatic naphtha；Do not affect the thermal aging property of goods simultaneously, not volatile.
In sum, a kind of high performance prestressed reinforced concrete pipe sealing ring of the offer of the present invention, its sizing compound formula is as follows:
The prestressed reinforced concrete pipe sealing ring of the present invention, it is main component by natural gum, N330 white carbon black, CC powder, solid coumarone resin and cycloalkanes line of oils, adds the reactive systems and preventing aging system that are made up of zinc oxide, stearic acid 1801, antioxidant 2246, paraffin and Polyethylene Glycol PEG4000 and the accelerator mixed by M+DTDM+TMTD+CZ simultaneously and vulcanizing agent S+DTDM is mixing forms.
Content as main component is (mass percent wt%):
The content of surfactant system is (mass percent wt%):
Zinc oxide 99.7%2-2.5
Stearic acid 18011.5-2.3
Polyethylene Glycol PEG40000.3-0.7
The content of preventing aging system is (mass percent wt%):
Antioxidant 2246 0.2-0.6
Paraffin 0.2-0.4
Accelerator and vulcanizing agent content are (mass percent wt%):
As the preferred version of the present invention, prestressed reinforced concrete pipe sealing ring provided by the invention, the sizing material with following component it is prepared from:
Content as main component is (mass percent wt%):
The content of surfactant system is (mass percent wt%):
Zinc oxide 99.7%2-2.5
Stearic acid 18011.5-2.3
Polyethylene Glycol PEG40000.3-0.7
The content of preventing aging system is (mass percent wt%):
Antioxidant 2246 0.2-0.6
Paraffin 0.2-0.4
Accelerator and vulcanizing agent content are (mass percent wt%):
Detailed description of the invention
Technical scheme in the embodiment of the present invention carried out clearly below, be fully described by, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiment.Give the embodiment in invention, all embodiments that those skilled in the art obtain under the premise not making creative work, broadly fall into protection scope of the present invention.
A kind of high performance prestressed reinforced concrete pipe of the offer of the present invention seals, it is main component by natural gum, N330 white carbon black, CC powder, solid coumarone resin and cycloalkanes line of oils, adds the reactive systems and preventing aging system that are made up of zinc oxide, stearic acid 1801, antioxidant 2246, paraffin and Polyethylene Glycol PEG4000 and the accelerator mixed by M+DTDM+TMTD+CZ simultaneously and vulcanizing agent S+DTDM is mixing forms.
Content as main component is (mass percent wt%):
The content of surfactant system is (mass percent wt%):
Zinc oxide 99.7%2-2.5
Stearic acid 18011.5-2.3
Polyethylene Glycol PEG40000.3-0.7
The content of preventing aging system is (mass percent wt%):
Antioxidant 2246 0.2-0.6
Paraffin 0.2-0.4
Accelerator and vulcanizing agent content are (mass percent wt%):
The restriction reason of the compositing range of the optical glass of the present invention is illustrated, 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, impurity content is minimum, excellent physical properties；Guarantee constant product quality.
N330 white carbon black is supporting material in formula, and the physical property of product is had greatly improved；Selecting the N330 white carbon black that Cabot Co., Ltd of the U.S. produces, reinforcing property is excellent, steady quality, simultaneously secure to meeting the environmental requirement changing aromatic hydrocarbon (PAHS) more.
Solid coumarone resin is softening agent, alone naphthenic oil consumption is too big, affect the physical property of product, solid coumarone resin is used not only to reduce hardness but also intensity can be increased, increase the compatible degree of each compounding ingredient in the viscosity of product and formula simultaneously, significantly improve elastomeric viscosity, reduce the peeling after sulfuration；Plasticization effect is good, improves calendering, the half-finished surface quality extruded so that processing technique becomes easy, improves white carbon black degree of scatter in sizing material.Solid coumarone resin contains phenolic group, it is possible to improve the ageing-resistant performance of sizing material；Softening point is more raised arrive reinforcing more good, compressive strength, tearing strength, flexibility all increase.
CC powder is the one of calcium carbonate, and as filler in formula, mainly for reducing cost, the less as far as possible performance affecting product simultaneously, consumption controls at 10wt%-20wt%.Select through fatty acid surface modified calcium carbonate (calcene CC powder), this materials reinforcing performance is more than conventional precipitated calcium carbonate, after sulfuration, the percentage elongation of product, tearing strength, flex cracking resistance are better than precipitated calcium carbonate, the contingency of the installation of product, practicality, elasticity and service life are had bigger help simultaneously.
Naphthenic oil, as the plasticizer of this sizing compound formula, can be effectively increased the distance of rubber molecule interchain, reduces the effect of molecule interchain, and produce lubrication, make easily to slide between strand, improve the dispersive property of white carbon black, increase mobility during sulfidization molding, improve mixing and sulfidization molding technique；It is simultaneously used for adjusting the hardness of goods.Owing to naphthenic oil is better with the compatibility of natural rubber, this naphthenic oil contaminative is little compared with aromatic naphtha；Do not affect the thermal aging property of goods simultaneously, not volatile.
Zinc oxide: activating agent zinc oxide is mainly used as vulcanizing activator in rubber, promotes the raising of rubber crosslink density by it, it is ensured that every physical and mechanical properties, helps induction accelerator reflection, promotes sulfuration.In sulfidation, zinc oxide occurs on the surface of zinc oxide particles as the reaction of activating agent with organic accelerator, stearic acid, sulfur etc..Owing to zinc oxide is good to the affine performance of electronics, the ability of adsorption enhancer is strong, generates the accelerator zinc salt dissolving in sizing material, thus improving its dissolubility, and forming the complex of a kind of zinc with amine or fatty acid, making accelerator more active under stearic effect.Simultaneously because add in complex by sulfur, forming very strong vulcanizing agent by induced activation effect, zinc oxide particles surface is constantly occurring reaction in the process, and particle diameter constantly reduces, and consumes zinc oxide until sizing material full cure.
Stearic acid: add as adjuvant, has softening and plasticization to sizing material；Increase the mobility of sizing material, increase release property and prevent mold fouling, increase the fully dispersed of white carbon black, filler and zinc oxide；Significantly reduce compound viscosity, improve processing performance, be remarkably improved the plasticity of sizing material；Improve sulfurate activity, play the effect of the second accelerator；React with zinc oxide or alkaline accelerator and can promote its activity, or main vulcanization accelerator additive, the work of the second accelerator can be played, hardening can be made to accelerate.
Paraffin: physical antioxidant (environment-friendly type, environmentally safe); physics protecting film is formed at product surface after product sulfuration; effectively prevent goods loss of function because of the infiltration of external environment (such as daylight, bromine oxygen, ultraviolet etc.), thus improve the service life of product.
Antioxidant 2246: aldehydes antioxidant, environment-friendly type, environmentally safe), heat, oxygen, aging cracking are had fabulous protective action, have especially played maximum protective benefits to the rubber under daylight is aging；Especially with paraffin with protecting the infringement to vulcanizate of the various factors such as weather, thus substantially prolongs the service life of product.
Polyethylene Glycol (PEG4000): modifying agent, shielded surfaces hydroxyl, main and acid material effect, filler is made not reunite, better dispersion, increases the compatibility of filler and rubber, polarity and the nonpolar powder linked up in activation dispensing formulations, can reduce or eliminate the filler impact on sulfuration, can improve and accelerate goods case depth and curingprocess rate.Various auxiliary agent can be made to be uniformly dispersed and extend time of scorch, improving the physical and mechanical properties of rubber.There is good lubrication, make product surface more smooth.Non-volatile, do not produce ash change, demoulding rear mold keeps cleaning.And pressing surface is also due to its addition and more smooth cleaning.
Captax: universal vulcanization accelerator, does the second accelerator (environmental protection, nontoxic) in formula, can promote that CZ, TMTD carry out promoting sulfur cross-linking by fast synergistic；Sulfuration flatness is very wide, due to relatively low (the mainly DTDM+TMTD of the sulfur content in formula, high temperature decomposes and precipitates out free sulphur, thus sizing material is vulcanized), M has sulfuration to delay and the effect of anti-incipient scorch in sulfidation, increases the safety in sulfidation and the safety of sizing material storage.Natural rubber is had plasticization (improve the mobility of vulcanizate and improve sulfuration process) simultaneously.
Vulcanization accelerator TMTD: ultra fast accelerator, does the second accelerator in formula, the collaborative DTDM of promotion carries out promoting sulfuration.Effect fierceness, it is possible to accelerate curingprocess rate；TMTD high temperature decomposes simultaneously and precipitate out free sulphur, effective sulfur content 13.3%, use Gu make again vulcanizing agent in formula, reducing the consumption of sulfur, because decomposition temperature is relatively low, sulfuration process processing safety is bad, so using on a small quantity, being mainly used in the collaborative DTDM of promotion and carrying out promoting sulfuration.All with sulfur cross-linking, the high temperature resistant of goods is very helpful than common, the physical property of goods is very helpful.
Diphenylguanidine TDM: ultra fast accelerator, does the second accelerator in formula, be again the second vulcanizing agent simultaneously.Curingprocess rate can be accelerated；High temperature decomposes and precipitates out free sulphur, effective sulfur content 33%, it is possible to the effective consumption reducing sulfur, owing to decomposition temperature is higher than TMTD, sulfuration process operability is than TMTD safety, so using (collaborative sulfur cross-linking) as the second accelerator and vulcanizing agent in formula.All with sulfur cross-linking, the high temperature resistant of goods is very helpful than common, the physical property of goods is very helpful, adopt the balanced constant of the short low-sulfur of height, be greatly improved goods crosslink density, improve pressure antitypy energy thermal ageing resistant performance.
Accelerant CZ: general delayed action accelerator, formula does the first accelerator and uses (primary accelerator), have the two big advantages that scorching quality is excellent and cure time is short concurrently, stress at definite elongation and the tensile strength of vulcanized article can be improved, product is installed the suitability and is very helpful.
S: vulcanizing agent, at high temperature changes into measurements of the chest, waist and hips network molecule chain structure by the linear molecule chain structure of rubber, thus improving the various physical properties (such as hardness, elasticity, breaking strength, elongation at break etc.) of goods, improves the use value of goods；Owing to formula having the collaborative sulfuration of diphenylguanidine TDM, greatly reduce the consumption of sulfur.
Embodiment:
Prestressed reinforced concrete pipe sealing ring provided by the invention, is prepared from by the sizing material with following component:
Content as main component is (mass percent wt%):
The content of preventing aging system is (mass percent wt%):
Accelerator and vulcanizing agent content are (mass percent wt%):
The newly energy with prestressed reinforced concrete pipe sealing ring prepared by this composition sizing material is as follows:
Claims (2)
1. prestressed reinforced concrete pipe sealing ring, it is characterized in that: be main component by natural gum, N330 white carbon black, CC powder, solid coumarone resin and naphthenic oil, add preventing aging system and the accelerator mixed by M+DTDM+TMTD+CZ that the activator that is made up of zinc oxide, stearic acid 1801, Polyethylene Glycol PEG4000 and antioxidant 2246, paraffin constitutes simultaneously and vulcanizing agent S+DTDM is mixing forms；Wherein, the mass percent wt% of each component is:
2. prestressed reinforced concrete pipe sealing ring according to claim 1, it is characterised in that:
The mass percent wt% of each main component is:
Priority Applications (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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| 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 CN103724707A (en) | 2014-04-16 |
| CN103724707B true CN103724707B (en) | 2016-07-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN103450512A (en) * | 2012-05-31 | 2013-12-18 | 孙菊 | Production technology of seal ring |
| CN103450510A (en) * | 2012-05-31 | 2013-12-18 | 沈燕 | O-shaped 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 |
| CN103450512A (en) * | 2012-05-31 | 2013-12-18 | 孙菊 | Production technology of seal ring |
| CN103450510A (en) * | 2012-05-31 | 2013-12-18 | 沈燕 | O-shaped 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 |
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| CN103724707A (en) | 2014-04-16 |
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