CN1715357A - New method for connecting polyethylene pipeline and its used adhesive - Google Patents
New method for connecting polyethylene pipeline and its used adhesive Download PDFInfo
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- CN1715357A CN1715357A CN 200510021337 CN200510021337A CN1715357A CN 1715357 A CN1715357 A CN 1715357A CN 200510021337 CN200510021337 CN 200510021337 CN 200510021337 A CN200510021337 A CN 200510021337A CN 1715357 A CN1715357 A CN 1715357A
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Abstract
The present invention relates to a kind of single component adhesive capable of being cured at normal temperature and moist condition. It has polyurethane produced through reacting liquid hydrocarbon rubber with active radical and polyisocyanate compound as base material, and the said active radical is hydroxyl radical, amino radical or carboxyl radical with reaction activity on isocyanate. The adhesive is prepared through one simple and cheap one-step process. The adhesive has high adhering strength on polyethylene, glass fabric, metal and other material, and certain flexibility. The present invention provides one fabric and adhesive winding and adhering method for connecting pipes and the method can meet the sealing and strength requirements of buried pipeline. The adhesive may be cured within 1-3 days under normal temperature and moist condition.
Description
Technical field
The present invention relates to the novel method that a kind of new tackiness agent and this tackiness agent are used for the connection of polyethylene pipe, belong to pipeline connection technology.
Background technology
Along with the raising of environmental protection requirement, urban sewage discharge becomes the problem of social pay attention to day by day.Many big and medium-sized cities have required rainwater, domestic water, trade effluent to discharge respectively and handle, and underground network of drains construction is had higher requirement.Because cast iron pipe, the concrete pipe of traditional usefulness have distinct disadvantage, be limited to use.A large amount of uses mainly is polyethylene tube and polyvinyl chloride pipe at present.Wherein since polyvinyl chloride than great, property is crisp, carrying, in the construction process or after burying ground because stratigraphic fluctuation causes collision etc., cause that easily cracking, particularly cold district are particularly serious.And polyethylene proportion is little, and snappiness is good, and the transportation construction is lighter, good reliability, and collision and distortion can not ftractureed.Therefore developed country all advocates the use polyethylene tube in the world.
Polyethylene is the sticking material of the difficulty of low surface energy, the difficult problem that is connected to become the countries in the world concern of pipeline.Multiple method of attachment has been arranged at present." with polyethylene structure wall tubing system " standard GB/T 19472.1 has with the method that GB/T 19472.2-2004 recommends with burying: elastic seal ring is connected, and two-way socket joint elastic sealing element connection, the connection of spigot seal part, flange connection, bell and spigot electric smelting welding, hot melt butt welding connection, V-type welding, heat shrink sleeve connect, Electric thermal smelting belt connects.These methods respectively have relative merits.Above-mentioned method of attachment can be divided into two types: preceding four kinds are the normal temperature construction, convenient, energy-conservation, but need the supporting pipe fitting of seriation, the link cost height, and reliability is undesirable; The back five kinds be to add thermo-welding (or welding), reliability is better, but needs specific equipment, electricity consumption or fire, difficulty of construction is big, and in moist location or the rainy day can not construct.Therefore be sought after a kind of easy construction, dependable performance, method of attachment that cost is low.
Polyurethane adhesive Polyurethane Adhesives is meant the tackiness agent that contains carbamate groups-NHCOO-or isocyanate group-NCO in molecular chain.The tackiness agent that the polyisocyanates tackiness agent is made up of polyisocynate monomer or its low molecule derivant is the early production in the polyurethane adhesive, belongs to the response type tackiness agent, and the bonding strength height is applicable to the bonding of metal and rubber, fiber etc.But owing to contain more free isocyano group, to moisture-sensitive, toxic, and contain organic solvent usually, therefore lessly use separately, but it is sneaked into the rubber-like tackiness agent or as linking agent with monomeric form, its principal item has the triisocyanate tackiness agent, the tetraisocyanate tackiness agent, polyisocyanates tackiness agent, TriMethylolPropane(TMP)-TDI affixture etc.Existing tackiness agent is commonly used two-pack, monocomponent adhesive.
Two component adhesive is such as application number 96115631.7, denomination of invention is the Chinese patent application of " preparation of normal temp solidification polyurethane toughened epoxy resin adhesive ", a kind of preparation method of polyurethane toughened epoxy resin adhesive is proposed, with aromatic diamines such as diamino diformazan sulfenyl toluene is solidifying agent, solidification value is a room temperature-60 ℃, be 10-48 hour set time, the shearing resistance of tackiness agent (steel-steel) 29.8MPa.Application number 00103599.1, " a kind of dual-component polyurethane adhesive and preparation method thereof ", it is a kind of dual-component polyurethane adhesive and preparation method thereof, the host that is characterized in tackiness agent is the polyol that makes with synthetic polyesterols, modified epoxy and toughener, and solidifying agent is the isocyanate prepolymer that the alcohol mixture with TDI and polyvalent alcohol and dibasic alcohol makes.Application number 94105401.2, the Chinese patent application of denomination of invention " polyurethane adhesive ", the urethane of selecting for use linear polyester and isocyanic ester addition polymerization to form terminal hydroxy group is made host (A component), the isocyanate terminated urethane that polyethers becomes with the isocyanic ester addition polymerization is as solidifying agent (B component), then, the polyurethane adhesive of forming by this two component.Above-mentioned two component adhesive, the underground construction inconvenience, and set time is longer, and tackiness agent bonded polyethylene insufficient strength height can't realize that the cloth glue of buried polyethylene pipeline twines bonding.
Monocomponent adhesive is such as application number 85100023, the Chinese patent application of denomination of invention " polyurethane binder and manufacturing process thereof ", proposed by polyisocyanates and the polyol compound that contains reactive hydrogen 30～120 ℃ down reaction to obtain isocyano-content be 5～25% isocyanate terminated prepolymer, and then carry out in the presence of stannous octoate, dibutyl tin laurate with polyalcohols that the solution method chain extending reaction makes.US 6,602,973, utilize the method for polyurethane preparation monocomponent adhesive, and disclosed method is: polymerization single polymerization monomer and diisocyanate monomer stirring reaction get polyisocyanates, wherein vulcabond residual quantity＞2%; Add dispersion agent, mineral filler, add solvent in the time of stirring; Residual vulcabond and the reaction of moisture in the filler make H in the reaction solution
2O＜0.01%; Add entry reactive curing agent and at least a catalyzer, seal standby.According to the specification sheets record, the tackiness agent shearing resistance for preparing is no more than 12N/cm
2, therefore can't satisfy the bonding strength of buried pipeline requirement, be difficult to realize that the cloth glue of buried polyethylene pipeline twines bonding.
Summary of the invention
The object of the present invention is to provide a kind of new tackiness agent, another technical scheme of the present invention is to provide a kind of novel method-powerful cloth glue of buried polyethylene pipe connection to twine bonding method.
Tackiness agent provided by the invention is a single-component normal temperature moisture-curable tackiness agent, and it is to be that to react the urethane that obtains be the tackiness agent of base-material for the liquid rubber (to call liquid carbon hydrogen rubber in the following text) of main chain and polyisocyanate compound with band active group hydrocarbon.
Described tackiness agent is to be prepared from by following raw materials by weight percent:
The liquid hydrocarbon rubber 50-80% of A, band active group;
Wherein, the liquid hydrocarbon rubber of described active group is the group with reactive behavior, as the liquid hydrocarbon rubber of hydroxyl, amido or carboxyl.This hydrocarbon rubber can be homopolymer, as hydroxyl terminated polybutadiene rubber (HTPB), and hydrogenation hydroxyl terminated polybutadiene rubber, terminal hydroxy group polyisoprene rubber, terminal hydroxy group isobutyl elastoprene; Also can be multipolymer, as hydroxyl isoprene-isobutylene rubber, and the liquid rubber product of the band amido of above-mentioned rubber or carboxyl.These liquid hydrocarbon rubber may be used alone, can also be used in combination; As required also can with polyether glycol, mix as polyoxypropyleneglycol, polyoxytrimethylene triol etc. and to use the conditioned reaction active group, reduce cost;
B, polyisocyanate compound 10-40%;
Require isocyanate functionality (being functional group's average number that each monomer molecule can be participated in reaction) 2-4, preferably normal temperature is liquid, as: 2, the 4-tolylene diisocyanate, 2,4-tolylene diisocyanate/2,6-tolylene diisocyanate mixture, the diphenylmethanediisocyanate of liquefaction, poly methylene poly phenyl poly isocyanate etc.These compounds may be used alone, can also be used in combination;
C, chainextender 0-5%;
Can add 1,4 butyleneglycol as required, TriMethylolPropane(TMP), low-molecular-weight epoxy resin etc.;
D, softening agent 0-8%;
Be used to regulate tackiness agent viscosity, be convenient to construction.As dibutyl phthalate, dioctyl phthalate (DOP), dioctyl sebacate etc.;
E, catalyzer: organic tin catalyzer 0.05-1.0%; Tertiary amine catalyst 0.05-1.0%;
For quickening the reaction of hydroxyl with isocyanic ester, generally add the organic tin catalyzer, as dibutyl tin laurate, stannous octoate etc.;
For quickening normal temperature steam curing reaction, add tertiary amine catalyst, as triethylamine, diethylenetriamine, triethylene diamine, trolamine etc.;
F, filler 3-20%;
The carbonic acid gas of emitting when solidifying for adsorbed moisture adds an amount of carbon black, plays the effect of pigment, filler simultaneously; For regulating the tackiness agent performance, reduce cost, can also add fillers such as lime carbonate, calcium oxide, talcum powder, potter's clay.
Because the polyethylene difficult sticking material that is low surface energy, need to select with the good low polar material of polyethylene avidity as main component; Simultaneously, in order to adapt to poly snappiness, behind the adhesive solidification better snappiness should be arranged.Be convenient outdoor tunnel construction, this tackiness agent should be a single component, need not field mix.Based on above-mentioned consideration, the liquid hydrocarbon rubber and the polyisocyanate compound that the invention provides with the band active group react the polyurethane preparation tackiness agent that obtains.
The preparation method of tackiness agent provided by the invention comprises:
The liquid hydrocarbon rubber and the chainextender of band active group are added in the reactor; be decompressed to below the 1.33KPa; be warming up to 100-110 ℃; dewatered 1-2 hour, and be cooled to below 80 ℃, add polyisocyanate compound and organic tin catalyzer; under nitrogen protection; 60-80 ℃ was reacted 2-3 hour, was cooled to below 50 ℃, added softening agent, filler, tertiary amine catalyst etc.Fully stirred 0.5-1 hour, discharging obtains black heavy-gravity single-component mist-solidifying tackiness agent, and sealing is preserved standby.
Measure isocyanate content when not filled (sampling) according to HG/2409-92, be generally 3-10%.
Be determined at temperature 20-25 ℃ with reference to GB/T13477-92 " surface drying time and surperficial inharmonious speed testing method ", the inharmonious time under the relative humidity 60-80% condition, the general inharmonious time is 0.5-5.0 hour.
The inharmonious time can be used as the sign of adhesive solidification speed, promptly is exposed to from gluing to begin the air to touch the timed interval of surperficial adhesion without adhesiver on finger with finger, and the inharmonious time is short more, and the expression curing speed is fast more.
According to the PE-PE shearing resistance of GB/7124-86 " tackiness agent tensile shear strength measuring method " mensuration after bonding 3 days, be generally 25-60N/cm
2Measure carbon steel-carbon steel shearing resistance and be generally 160-200N/cm
2
The present invention also provides a kind of novel method that connects polyethylene pipe---powerful cloth glue twines bonding method, that is: use simple cloth glue winding method reach bonding seal for pipe joints good, the intensity height.Concrete method of attachment is:
Use tackiness agent of the present invention, two pipes to be connected terminal outer survey evenly brushing after, winding one deck woven fiber glass is coated with one deck tackiness agent again on woven fiber glass, twine one deck woven fiber glass again, so repeatedly until desired thickness, brushing one deck tackiness agent more at last; Also can stick with glue the agent preimpregnation to woven fiber glass earlier, directly twine.Like this, form certain thickness woven fiber glass-tackiness agent matrix material, polyethylene tube is coupled together, play the adhering and sealing effect at two pipe coupling places.Its thickness is determined according to the pressure for the treatment of collophore road diameter and bearing, and controls by the number of plies of twining woven fiber glass, is generally the 1-10 layer, as being two cloth, three glue, three cloth, four glue etc.
Specifically comprise:
A, will treat that junction, collophore road outside surface is coarse with polishings such as sand paper, steel brushes, and clean floating dust with the cotton yarn of cleaning.
B, treating that with scraper or plastic roller gluing of surfaces evenly is coated with one deck tackiness agent, twine a circle woven fiber glass, on the woven fiber glass that winds, be coated with one deck tackiness agent again, twine a circle woven fiber glass again, so repeatedly, up to the thickness that requires, also can use the woven fiber glass of preimpregnation tackiness agent directly to be wound to desired thickness.
C, the one deck of one deck woven fiber glass outside brushing in the end tackiness agent, and modify, make it smooth smooth.
D, normal temperature, moisture-curable (being preferably in more than 5 ℃, in the environment of relative humidity more than the 40%) time can solidify substantially, can reach working strength in three days.
The woven fiber glass that this method is used is high strength S-glasscloth preferably, also can be with E-glasscloth, C-glasscloth.(all being called for short woven fiber glass herein)
Bonding polyethylene tube is tested according to GB/T19472.1-2004 standardization appendix B " the seal test method of resilient seal joint ".The joint that the present invention connects surpasses the requirement of this standard, can satisfy the requirement of buried polyethylene pipe connection.
Tackiness agent provided by the invention all has than high-adhesive-strength materials such as polyethylene, woven fiber glass, metals, and has certain snappiness.The method one-step synthesis for preparing tackiness agent provided by the invention, technology is simple, and is with low cost.The tackiness agent of preparation can connect general polyethylene extrusion pipe, polyethylene double-wall corrugated pipe with twining bonding simple method, and polyethylene spirally enwound structure-wall pipe, steel are strengthened composite screw and twined polyethylene tube; Also can bonding other plastics tubing, as polyvinyl chloride pipe, polypropylene tube etc.; But bonded metal pipeline also.
The be intertwined and connected advantage of method of cloth glue is:
1, easy construction, simple does not need specific equipment and instrument, does not need supporting pipe fitting yet.
2, normal temperature construction, ambient cure need not heating, need not be fiery, and not electricity consumption, safe, energy-conservation, be convenient to field or long distance construction.
3, not limited by caliber, can be used for the pipe connection of various diameters, especially for the more apparent advantage of large-diameter pipeline.
4, do not needed drying treatment by bonding plane, be fit to the wet environment construction.
5, do not discharge any unwanted volatile in construction and the solidification process, free from environmental pollution, help workmen's health, compliance with environmental protection requirements.
6, have behind the adhesive solidification than the better snappiness of polyethylene, adhering and sealing is functional, and is water-fast, ageing-resistant performance good, connects reliable, durable.
7, compare with existing polyethylene tube pipeline connecting method, engineering cost is low.
Below mode by specific embodiment the present invention is further described, be limitation of the invention but should not be construed as.The modification of all various ways of making based on the above-mentioned technological thought of the present invention, replacement or change all belong to the present invention.
Embodiment
Embodiment 1
The 1L there-necked flask is equipped with electric mixer, condenser, thermometer, nitrogen ingress pipe.The HTPB that adds molecular weight Mn=1500,424g, 1,4-butyleneglycol 9.2g was evacuated to below the overbottom pressure 1.33Kpa, is warming up to 100 ℃, 100-110 ℃ of dehydration 1 hour.Be cooled to 80 ℃, add 2,4 toluene diisocyanate 104g, dibutyl tin laurate 2.8g, 80 ± 5 ℃ of reactions 2 hours, add dioctyl phthalate (DOP) 20g, triethylene diamine 1.8g, carbon black 30g, fully stirred 0.5 hour, be cooled to 50 ℃, pack with bottom discharge.
Gained tackiness agent black, good fluidity, easily brushing.20-25 ℃, relative humidity 60-70%, 2.5 hours inharmonious time, measuring isocyanate content is 3.5%, PE-PE tensile shear strength 28N/cm
2
With the bonding φ of above-mentioned tackiness agent (external diameter) 440/ φ (internal diameter) 400 (hereinafter implication is identical) polyethylene spirally enwound structure-wall pipe, connected tube one segment length 0.5m, another segment length 2.5m, woven fiber glass width 200mm, treat that gluing of surfaces evenly is coated with one deck tackiness agent, twine a circle woven fiber glass, on the woven fiber glass that winds, be coated with one deck tackiness agent again, twine a circle woven fiber glass again ... so repeatedly, three cloth, four glue.0.5m the other end shutoff of connected tube after bonding 24 hours, will be managed setting, long section is filled with water in the above.At this moment, the 2.5m water colunm pressure is born in the junction, is 0.025MPa, is higher than GB/T197472.1 appendix BP
1The requirement of=0.005MPa keeps 18 days joints not leak.After this two planks are pressed in the junction,, make a direction of external diameter be compressed to 410mm by 440mm with the pressurization of two bolts, (deformation rate 6.8%, be higher than that standard appendix B requires 5%), the junction crack-free does not leak, and continues to keep not leaking in 20 days.The tackiness agent that present method manufacturing is described can satisfy polyethylene pipe and connect seal request, calculates this joint by bond area and can bear tensile shear power and be about 6908Kg.
Embodiment 2
The HTPB of molecular weight Mn=1500 changes among raw material: the embodiment 1, Mn=2200,500g, 1, the 4-butyleneglycol changes TriMethylolPropane(TMP) 7.5g into, 2, the 4-tolylene diisocyanate changes 2,4/2 into, 6-tolylene diisocyanate mixture (commercially available TDI-80) 108g, 2.1g triethylamine replaces the 1.8g triethylene diamine, other raw material is with embodiment 1.Reaction unit is identical with example 1 with operational condition.
The tackiness agent black thickness for preparing, easily brushing.2 hours inharmonious time.Measure isocyanate content 4.1%, PE-PE shearing resistance 36N/cm
2, carbon steel-carbon steel shearing resistance 184N/cm
2
Adopt cloth glue to twine adhering method with above-mentioned tackiness agent and two φ, 55/ φ, 51 polyethylene pipe plugs are carried out to sticking seam crossing woven fiber glass width 60mm, three cloth, four glue.After three days, load onto tensimeter, fill the compression air to 0.520MPa (being equivalent to the 52m water column), observe after 15 days, pressure is 0.518MPa, shows that joint envelope gas is functional, the requirement that far exceeds sealing connection standard appendix B.
Change vacuum meter after the above-mentioned bond venting, (requirement-0.03MPa), pressure no change after 30 minutes illustrates that joint can bear negative pressure to appendix B, can not break because of distortion to be evacuated to overbottom pressure-0.04MPa.
With the bonding same polyethylene pipe plug of this tackiness agent, the filled with water tensimeter adds hydraulic pressure to 0.1MPa, (appendix B code requirement P
2=0.05Mpa), and pressurize 1 hour, the pressure no change illustrates the joint that method of the present invention connects, water shutoff is functional, can satisfy the requirement of buried polyethylene pipeline connection fully.
Embodiment 3
Reaction unit and operational condition are with example 1, and be reinforced identical with example 2, but add liquid isoprene-isobutylene rubber 25g (by cobalt-60 irradiation-induced degradation in air, becoming flowable thick liquid with commercially available solid-state isoprene-isobutylene rubber).The monocomponent adhesive that obtains, the black thickness is easily brushed at polyethylene surface.Measure isocyanate content 4.0%; 2.0 hours inharmonious time; PE-PE shearing resistance 45N/cm
2
Adopting cloth glue to twine adhering method with above-mentioned tackiness agent connects two φ, 55/ φ, 51 polyethylene pipe plugs.After 3 days, fill air 0.2MPa, do not leak after 1 hour; After the venting, be evacuated to overbottom pressure-0.04Mpa, pressure no change after 30 minutes; Remove vacuum, be filled with water to 0.1Mpa, pressurize 1 hour, pressure no change.Can reach the requirement of GB/T197472.1 appendix B.
Embodiment 4
Reaction unit and operational condition are with example 1.Feed in raw material and be: the HTPB 340g of Mn=2000,1,4-butyleneglycol 21.6g, 2,4/2,6-tolylene diisocyanate mixture (commercially available TDI-80) 95.7g, poly methylene poly phenyl poly isocyanate (commercially available PM-200) 72.9g, dibutyl tin laurate 2.0g, triethylamine 2.0g, carbon black 16g, talcum powder 22g.The monocomponent adhesive that obtains, black thickness, easily brushing.Measure isocyanate content 6.2%; 1.0 hours inharmonious time; PE-PE shearing resistance 42N/cm
2
With this tackiness agent and example 3 the same bonded polyethylene pipe plugs, estimate adhering and sealing, can reach the requirement of GB/T197472.1 appendix B.
Embodiment 5
Reaction unit and operational condition are with example 1.Feed in raw material and be: the HTPB 300g of Mn=1500, the polyoxypropyleneglycol of Mn=2000 (commercially available JH2020) 165g, liquid-state epoxy resin (commercially available E-51) 24g, 2,4 toluene diisocyanate is 99g, other feeding quantity are identical with example 1.The monocomponent adhesive that obtains, black thickness, easily brushing.Measure isocyanate content 4.0%; 1.5 hours inharmonious time; PE-PE shearing resistance 25N/cm
2
With this tackiness agent and example 3 the same bonded polyethylene pipe plugs, estimate adhering and sealing, can reach the requirement of GB/T197472.1 appendix B.
Embodiment 6
Reaction unit and operational condition are with example 1.Feed in raw material and be: end carboxyl polyisoprene rubber (commercially available LXIR-403) 300g of Mn=25000, the HTPB 200g of Mn=1500,1,4-butyleneglycol 4.5g, 2,4/2,6-tolylene diisocyanate mixture (commercially available TDI-80) 71g, stannous octoate 1.7g, diethylenetriamine 3.4g, carbon black 29g, lime carbonate 10g.
The monocomponent adhesive that obtains, the black thickness can be brushed.Measure isocyanate content 3.0%; 3 hours inharmonious time; PE-PE shearing resistance 27N/cm
2
With this tackiness agent and example 3 the same bonded polyethylene pipe plugs, estimate adhering and sealing, can reach the requirement of GB/T197472.1 appendix B.
Claims (9)
1, a kind of single component normal temperature moisture-curable tackiness agent, it is that the urethane that obtains with the liquid hydrocarbon rubber of 50-80%w/w band active group and the reaction of 10-40%w/w polyisocyanate compound is the tackiness agent of base-material, and the liquid hydrocarbon rubber of described band active group is the liquid hydrocarbon rubber with hydroxyl, amido or carboxyl.
2, tackiness agent according to claim 1 is characterized in that: it is to be prepared from by following raw materials by weight percent:
The liquid hydrocarbon rubber 50-80% of A, band active group;
B, polyisocyanate compound 10-40%;
C, chainextender 0-5%;
D, softening agent 0-8%;
E, catalyzer: organic tin catalyzer 0.05-1.0%; Tertiary amine catalyst 0.05-1.0%;
F, filler 3-20%.
3, tackiness agent according to claim 2 is characterized in that:
The liquid hydrocarbon rubber of described band active group is: hydroxyl terminated polybutadiene rubber, the hydrogenation hydroxyl terminated polybutadiene rubber, the terminal hydroxy group polyisoprene rubber, one or more in the band amido of terminal hydroxy group isobutyl elastoprene or above-mentioned rubber or the liquid rubber product of carboxyl; Or isoprene-isobutylene rubber;
Described isocyanic ester is: 2,4 toluene diisocyanate, 2,4 toluene diisocyanate/2, the diphenylmethanediisocyanate of 6-tolylene diisocyanate mixture, liquefaction, in the poly methylene poly phenyl poly isocyanate one or more;
Described chainextender is: 1, and 4-butyleneglycol, TriMethylolPropane(TMP) or low-molecular-weight epoxy resin;
Described softening agent is: dibutyl phthalate, dioctyl phthalate (DOP) or dioctyl sebacate;
Described organic tin catalyzer is dibutyl tin laurate or stannous octoate;
Described tertiary amine catalyst is triethylamine, diethylenetriamine, triethylene diamine or trolamine;
Described filler is carbon black, lime carbonate, calcium oxide, talcum powder or potter's clay.
4, tackiness agent according to claim 3 is characterized in that: add polyether glycol in the liquid hydrocarbon rubber of described band active group.
5, prepare the method for the described tackiness agent of claim 1, it is characterized in that:
The liquid hydrocarbon rubber and the chainextender of band active group are added in the reactor, be decompressed to below the 1.33KPa, be warming up to 100-110 ℃, dewatered 1-2 hour, be cooled to below 80 ℃, add how different hydrogen acid ether compound and organic tin catalyzer, under nitrogen protection, 60-80 ℃ was reacted 2-3 hour, and was cooled to below 50 ℃, add softening agent, filler, tertiary amine catalyst; Fully stir 0.5-1 hour promptly.
6, the purposes of the described single component normal temperature of claim 1 moisture-curable tackiness agent in the buried polyethylene pipe bonding.
7, a kind of method-powerful cloth glue that connects polyethylene pipe twines bonding method, may further comprise the steps:
A, at terminal outer each the described tackiness agent of even brushing claim 1～4 of surveying of two pipes to be connected, winding one deck woven fiber glass;
B, above-mentioned steps repeatedly until reaching desired thickness, are coated with one deck tackiness agent at last, and the normal temperature moisture-curable got final product in 1～3 day.
8, a kind of method-powerful cloth glue that connects polyethylene pipe twines bonding method, it is characterized in that:
Woven fiber glass each described tackiness agent preimpregnation of claim 1～4, directly twine earlier, like this, form 1 layer or multiple glazing cloth-tackiness agent matrix material at two pipe coupling places, the normal temperature moisture-curable got final product in 1～3 day.
9, according to the method for claim 7 or 8 described connection polyethylene pipes, it is characterized in that: described woven fiber glass is high strength S-glasscloth, E-glasscloth, C-glasscloth.
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| CNB2005100213371A CN1314770C (en) | 2005-07-27 | 2005-07-27 | New method for connecting polyethylene pipeline and its used adhesive |
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| CNB2005100213371A CN1314770C (en) | 2005-07-27 | 2005-07-27 | New method for connecting polyethylene pipeline and its used adhesive |
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| CN104277754A (en) * | 2013-07-29 | 2015-01-14 | 湖北航天化学技术研究所 | Combustion-restricted layer material applied to NEPE (Nitrate Ester Plasticized Polyether) propellant and preparation method of combustion-restricted layer material |
| CN104277754B (en) * | 2013-07-29 | 2016-06-15 | 湖北航天化学技术研究所 | A kind of limit combustion layer material and its preparation method being applicable to NEPE propelling agent |
| CN104191742A (en) * | 2014-07-31 | 2014-12-10 | 山东浩阳新型工程材料股份有限公司 | Sodium-based bentonite waterproof carpet |
| CN106010365A (en) * | 2016-07-07 | 2016-10-12 | 芜湖风雪橡胶有限公司 | Rubber adhesive and preparation method thereof |
| CN106367017A (en) * | 2016-08-29 | 2017-02-01 | 无锡万能胶粘剂有限公司 | All-purpose adhesive |
| CN106122537A (en) * | 2016-08-31 | 2016-11-16 | 南京晨光集团有限责任公司 | Encapsulating method between a kind of chip multiple directional control valve valve block |
| CN108048023A (en) * | 2017-11-30 | 2018-05-18 | 北京东方雨虹防水技术股份有限公司 | A kind of quick-setting two-component response type bonding agent and preparation method thereof |
| CN109233689A (en) * | 2018-09-04 | 2019-01-18 | 温州大学新材料与产业技术研究院 | A kind of liquid rubber type temperature resistance pressure sensitive adhesive and preparation method thereof |
| CN110701408A (en) * | 2019-10-12 | 2020-01-17 | 上海友为工程设计有限公司 | Sealing method for water pipeline without water interruption for ladder opening |
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| CN1314770C (en) | 2007-05-09 |
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