CN109735287A - A kind of production method of polyurethane sealant - Google Patents
A kind of production method of polyurethane sealant Download PDFInfo
- Publication number
- CN109735287A CN109735287A CN201910032417.9A CN201910032417A CN109735287A CN 109735287 A CN109735287 A CN 109735287A CN 201910032417 A CN201910032417 A CN 201910032417A CN 109735287 A CN109735287 A CN 109735287A
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- CN
- China
- Prior art keywords
- polyethers
- temperature
- tdi
- component
- diglycol
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000004588 polyurethane sealant Substances 0.000 title claims abstract description 13
- 229920000570 polyether Polymers 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 125000003118 aryl group Chemical group 0.000 claims abstract description 8
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000012188 paraffin wax Substances 0.000 claims abstract description 8
- 238000009835 boiling Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000003054 catalyst Substances 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims abstract description 5
- 239000004113 Sepiolite Substances 0.000 claims abstract description 4
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 238000005516 engineering process Methods 0.000 claims abstract description 4
- 230000003340 mental effect Effects 0.000 claims abstract description 4
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 4
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 4
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 4
- 230000007423 decrease Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 4
- 230000008023 solidification Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract description 4
- 230000032798 delamination Effects 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000004590 silicone sealant Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Sealing Material Composition (AREA)
Abstract
The invention discloses a kind of production methods of polyurethane sealant, include the following steps: S product formula: A:MDI5018%, polyethers 330N20%, polyethers 200062%；B: diglycol 2.5%, catalyst 0.5%, aromatic naphtha 9%, chlorinated paraffin 18%, DOP12%, talcum powder 46%, sepiolite 2%；Equipment: electric furnace (1000W), bath, four-hole boiling flask (1000mL), condenser pipe, electronic splash bar (sealing), vacuum pump, temperature controller, thermometer (0~240C), 500mL separatory funnel, mental package pipe；Configuration method: component A: TDI, polyethers n330, polyethers 2000 are proportionally added into reaction kettle and are heated to 90 DEG C, constant temperature stirs 2h cooling discharge；B component: by diglycol, talcum powder, aromatic naphtha, chlorinated paraffin, DOP stirring at normal temperature uniform discharge in proportion；Synthesis technology: polyethers 12f/3f=l, TDI1NCO/OH=2.5.Have following advantages compared with prior art: extending, cohesive force low reduction cracking and with basic delamination, cryogenic conditions under flexible, endurance etc. good with base bond.
Description
Technical field
The present invention relates to a kind of production methods, more specifically more particularly to a kind of production method of polyurethane sealant.
Background technique
Polyurethane sealant system is with polyurethane rubber and base polyurethane prepolymer for use as sealant as main component, such sealant
It is especially alkaline-resisting aqueous to owe with high tensile strength, excellent elasticity, wearability, oil resistivity and cold resistance, but water resistance
It is good, heating vulcanization type, room temperature vulcanized and three kinds of heat molten type can be divided into, wherein room temperature vulcanized have again one pack system and bi-component it
Point, be widely used in building, square, highway as inlay sealing material and automobile manufacture, glass installation, electronic filling,
The sealing of submarine and rocket etc..
Most domestic high-speed railway, which is open to traffic, at present has several years, railway in the process of running, base plate and track switch
Plate bears high-intensitive high-frequency vibration daily, and the filling original between plate stitch mostly uses CA mortar or conventional cement mortar, in high frequency
Gradually loose, fragmentation under vibration, can enter rainwater between having rain and snow weather plate stitch, and hydrostatic pressing is generated when high-speed rail train passes through and is accelerated
The loss of mortar causes the sliding of regulation track or horizontal departure between plate stitch, and in order to renovate this disease, industry mostly uses tradition to build
Silicone or polyurethane sealant are built, but conventional seals glue is chiefly used in building doors and windows or decoration, use environment is than high-speed railway rail
Good more of plate stitch.For this purpose, it is proposed that a kind of production method of polyurethane sealant.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of polyurethane sealant proposed
Production method, being capable of bring benefit: extend, the low reduction cracking of cohesive force and with basic delamination, low temperature good with base bond
Under the conditions of flexible, endurance etc..
To achieve the above object, the invention provides the following technical scheme: a kind of production method of polyurethane sealant, including
Following steps:
S1, product formula: A:MDI5018%, polyethers 330N20%, polyethers 200062%；B: diglycol
2.5%, catalyst 0.5%, aromatic naphtha 9%, chlorinated paraffin 18%, DOP12%, talcum powder 46%, sepiolite 2%；
S2, equipment: electric furnace (1000W), bath, four-hole boiling flask (1000mL), condenser pipe, electronic splash bar (sealing), vacuum
Pump, temperature controller, thermometer (0~240C), 500mL separatory funnel, mental package pipe；
S3, configuration method: component A: TDI, polyethers n330, polyethers 2000 are proportionally added into reaction kettle and are heated to 90
DEG C, constant temperature stirs 2h cooling discharge；B component: diglycol, talcum powder, aromatic naphtha, chlorinated paraffin, DOP is normal in proportion
Temperature stirs evenly discharging；
S4, synthesis technology: polyethers 12f/3f=l, TDI1NCO/OH=2.5, catalyst: in right amount, TDI is added to be equipped with and is stirred
It mixes device, dropping funel, thermometer and is connected in the four-hole boiling flask of vacuum pump, then the polyethers measured is poured into dropping funel,
Open to stir and simultaneously heat, when reaching certain temperature, start that polyethers is added dropwise, and start vacuum pump, process temperature control 50~
70 DEG C, after polyethers completion of dropwise addition, 2h is reacted into reaction system control again at a certain temperature, it is cooling after stopping heating, it calculates simultaneously
Packaging；
S5, product working principle: the reaction temperature of RNCO+ROH RNHCOOR, performed polymer consolidate one-component polyurethane
Changing speed has shadow, and reaction temperature opens height, and curing rate decline, this is when being increased by temperature, and pre-polymerization physical efficiency further polymerize, with temperature
Du Kaigao is this and polymerization superpotential increases, while autohemagglutination occurs with TDI, and just the amount of system NCO is reduced, curing rate decline,
Reaction temperature decline, curing rate rise, but often increase with glue-line expansion rate since reaction temperature is too low in real process
Not exclusively, in free TDI hardware system: NOC content increases for TDI reaction, when solidification hard CO2, release excessive, expand glue-line.
Preferably, application method: being mixed evenly in A:B=1:2 ratio, pour into or injection orbit plate stitch it
Between.
Technical effect and advantage of the invention: extending, cohesive force low reduction cracking and with basic delamination, with base bond
It is good, flexible under cryogenic conditions, endurance etc..
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.Based on the embodiments of the present invention, those of ordinary skill in the art are not before making creative work
Every other embodiment obtained is put, shall fall within the protection scope of the present invention.
Embodiment 1
A kind of production method of polyurethane sealant, includes the following steps:
S1, product formula: A:MDI5018%, polyethers 330N20%, polyethers 200062%；B: diglycol
2.5%, catalyst 0.5%, aromatic naphtha 9%, chlorinated paraffin 18%, DOP12%, talcum powder 46%, sepiolite 2%；
S2, equipment: electric furnace (1000W), bath, four-hole boiling flask (1000mL), condenser pipe, electronic splash bar (sealing), vacuum
Pump, temperature controller, thermometer (0~240C), 500mL separatory funnel, mental package pipe；
S3, configuration method: component A: TDI, polyethers n330, polyethers 2000 are proportionally added into reaction kettle and are heated to 90
DEG C, constant temperature stirs 2h cooling discharge；B component: diglycol, talcum powder, aromatic naphtha, chlorinated paraffin, DOP is normal in proportion
Temperature stirs evenly discharging；
S4, synthesis technology: polyethers 12f/3f=l, TDI1NCO/OH=2.5, catalyst: in right amount, TDI is added to be equipped with and is stirred
It mixes device, dropping funel, thermometer and is connected in the four-hole boiling flask of vacuum pump, then the polyethers measured is poured into dropping funel,
Open to stir and simultaneously heat, when reaching certain temperature, start that polyethers is added dropwise, and start vacuum pump, process temperature control 50~
70 DEG C, after polyethers completion of dropwise addition, 2h is reacted into reaction system control again at a certain temperature, it is cooling after stopping heating, it calculates simultaneously
Packaging；
S5, product working principle: the reaction temperature of RNCO+ROH RNHCOOR, performed polymer consolidate one-component polyurethane
Changing speed has shadow, and reaction temperature opens height, and curing rate decline, this is when being increased by temperature, and pre-polymerization physical efficiency further polymerize, with temperature
Du Kaigao is this and polymerization superpotential increases, while autohemagglutination occurs with TDI, and just the amount of system NCO is reduced, curing rate decline,
Reaction temperature decline, curing rate rise, but often increase with glue-line expansion rate since reaction temperature is too low in real process
Not exclusively, in free TDI hardware system: NOC content increases for TDI reaction, when solidification hard CO2, release excessive, expand glue-line.
Application method: being mixed evenly in A:B=1:2 ratio, pour into or injection orbit plate stitch between.
In summary: a kind of production method of polyurethane sealant provided by the invention, compared with the prior art, have with
Lower advantage: extending, cohesive force low reduction cracking and with basic delamination, it is good with base bond, it is flexible under cryogenic conditions, it is resistance to tired
Labor etc..
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention,
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features,
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (2)
1. a kind of production method of polyurethane sealant, characterized by the following steps:
S1, product formula: A:MDI5018%, polyethers 330N20%, polyethers 200062%；B: diglycol 2.5% is urged
Agent 0.5%, aromatic naphtha 9%, chlorinated paraffin 18%, DOP12%, talcum powder 46%, sepiolite 2%；
S2, equipment: electric furnace (1000W), bath, four-hole boiling flask (1000mL), condenser pipe, electronic splash bar (sealing), vacuum pump, control
Wen Yi, thermometer (0~24 DEG C), 500mL separatory funnel, mental package pipe；
S3, configuration method: component A: TDI, polyethers n330, polyethers 2000 being proportionally added into reaction kettle and are heated to 90 DEG C, perseverance
Temperature stirring 2h cooling discharge；B component: by diglycol, talcum powder, aromatic naphtha, chlorinated paraffin, DOP, room temperature is stirred in proportion
Mix uniform discharge；
S4, synthesis technology: polyethers 12f/3f=l, TDI1NCO/OH=2.5, catalyst: it is added in right amount, by TDI equipped with stirring
It device, dropping funel, thermometer and is connected in the four-hole boiling flask of vacuum pump, then the polyethers measured is poured into dropping funel, open
It opens stirring and heats, when reaching certain temperature, start that polyethers is added dropwise, and start vacuum pump, process temperature is controlled 50~70
DEG C, after polyethers completion of dropwise addition, 2h is reacted into reaction system control again at a certain temperature, it is cooling after stopping heating, it calculates and wraps
Dress；
The reaction temperature of S5, product working principle: RNCO+ROH RNHCOOR, performed polymer are fast to the solidification of one-component polyurethane
Degree has shadow, and reaction temperature opens height, and curing rate decline, this is when being increased by temperature, and pre-polymerization physical efficiency further polymerize, and opens with temperature
High this and polymerization superpotential increases, while autohemagglutination occurs with TDI, and just the amount of system NCO is reduced, curing rate decline, reaction
Temperature decline, curing rate rise, but often increase with glue-line expansion rate since the too low TDI of reaction temperature is anti-in real process
Should be not exclusively, in free TDI hardware system: NOC content increases, when solidification hard CO2, release excessive, expand glue-line.
2. a kind of production method of polyurethane sealant according to claim 1, it is characterised in that: application method: pressing A:B
=1:2 ratio is mixed evenly, pour into or injection orbit plate stitch between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032417.9A CN109735287A (en) | 2019-01-14 | 2019-01-14 | A kind of production method of polyurethane sealant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032417.9A CN109735287A (en) | 2019-01-14 | 2019-01-14 | A kind of production method of polyurethane sealant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109735287A true CN109735287A (en) | 2019-05-10 |
Family
ID=66364732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910032417.9A Pending CN109735287A (en) | 2019-01-14 | 2019-01-14 | A kind of production method of polyurethane sealant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109735287A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818045A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Two-component polyurethane sealant |
| CN105647459A (en) * | 2016-02-03 | 2016-06-08 | 广州大禹防漏技术开发有限公司 | Reaction-bonding-type two-component self-leveling polyurethane seal gum and preparing method thereof |
-
2019
- 2019-01-14 CN CN201910032417.9A patent/CN109735287A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101818045A (en) * | 2009-02-26 | 2010-09-01 | 北京东方雨虹防水技术股份有限公司 | Two-component polyurethane sealant |
| CN105647459A (en) * | 2016-02-03 | 2016-06-08 | 广州大禹防漏技术开发有限公司 | Reaction-bonding-type two-component self-leveling polyurethane seal gum and preparing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘菁等: "聚氨酯密封胶的研制", 《科技情报开发与经济》 * |
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Application publication date: 20190510 |