CN1087368A - Visco-elasticity polyurethane sealing agent and manufacturing process thereof - Google Patents
Visco-elasticity polyurethane sealing agent and manufacturing process thereof Download PDFInfo
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- CN1087368A CN1087368A CN 92113420 CN92113420A CN1087368A CN 1087368 A CN1087368 A CN 1087368A CN 92113420 CN92113420 CN 92113420 CN 92113420 A CN92113420 A CN 92113420A CN 1087368 A CN1087368 A CN 1087368A
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Abstract
A kind of visco-elasticity polyurethane sealing agent and manufacturing process thereof.The sealing agent was at first reacted 1～3 hour under 50～90 ℃ of conditions by polyisocyanates and polyol, again through dibasic alcohol chain extension 0.5～1 hour, make the performed polymer that content is the isocyanate-terminated thing of 0.5～15% (weight percent concentration), make with solidifying agent, catalyzer, filler thorough mixing under 10～35 ℃ condition again.The sealing agent has visco-elasticity, and product such as does not in use need to solidify at characteristics again, can be widely used in the sealing of materials such as metal, pottery, glass and bonding.
Description
The present invention is the visco-elasticity polyurethane sealing agent.
The urethane sealing material is generally by giving aggressiveness, solidifying agent and catalyzer through making.People can be by making the sealing material of single-component or two components to the improvement of the solidifying agent in the urethane sealing material, catalyzer and filler.Sealing material in use is solidified into elastomer sealants through solidifying agent; Also can be by improving the caking agent that obtains having cementability to giving the aggressiveness preparation method.United States Patent (USP) 3372083 passes through the improvement to solidifying agent, catalyzer in prescription, and makes filler with pitch, obtained having the polyurethane sealant of favorable elasticity, but the cementability of this sealing agent is very poor.Chinese patent CN85100023A made the polyurethane adhesive with good bonding ability with the solution method chain extension again, but this caking agent elasticity is very poor with polyester polyol and isocyanate reaction.Owing to this reason, make it should not make sealing agent, use and can only make caking agent.
The purpose of this invention is to provide a kind of good bonding performance that both had, the visco-elasticity sealing agent that has caoutchouc elasticity again, in use no longer need with solidifying agent solidified characteristics to overcome the shortcoming that sealing agent in the prior art does not have the good bonding performance, sealing agent is possessed.
Visco-elasticity polyurethane sealing agent of the present invention at first is by containing 10～19%(weight percent concentration) polyisocyanates with contain 78～89%(weight percent concentration) polyol under 50～90 ℃ of conditions, reacted 1～3 hour, again through containing 0.5～4%(weight percent concentration) dibasic alcohol chainextender chain extension 0.5～1 hour, making content is 0.5～15%(weight percent concentration) isocyanate-terminated thing give aggressiveness, its optimum content scope is 1～6%(weight percent concentration).Wherein the polyisocyanates compounds is: diphenylmethanediisocyanate (MDI), liquefaction diphenylmethanediisocyanate (liquefied mdi), 2,4-tolylene diisocyanate (2,4-TDI), 2,6-tolylene diisocyanate (2,6-TDI), 2,4 toluene diisocyanate (2,4-TDI) and 2, the 6-tolylene diisocyanate (2, mixture 6-TDI), hydrogenated tolylene diisocyanate (HDI), many benzene of polymethylene polyisocyanates (PAPI) and their mixture.Polyol is: two functional group's polyethers, two functional group's polyester, trifunctional polyethers, dihydrofuran polyvalent alcohol, hydroxy-end capped butadiene polymer and their mixture thereof.The organic solvent that the dibasic alcohol chainextender is used is by 1,4-butyleneglycol, hexylene glycol, 1, and the 6-hexylene glycol is prepared according to suitable proportion.Make that to give behind the aggressiveness content be 46～61%(weight percent concentration) isocyanate-terminated thing and content be the 7-9%(weight percent concentration) solidifying agent and content be 0.025～0.05%(weight percent concentration) catalyzer and content be 30～46%(weight percent concentration) multiple filler just made visco-elasticity polyurethane sealing agent at 10～35 ℃ of following thorough mixing with good visco-elasticity function, and this sealing agent in use no longer needs solidifying agent to solidify.In above-mentioned process for preparation, wherein used solidifying agent is: two or three above functional group polyethers, polyamine, imines and their mixture.Catalyzer is organotin, tertiary amine, organic cobalt and their mixture.Filler is: mineral filler, organic filler, functional filler.Mineral filler is: talcum powder, lime carbonate, white carbon black, stone flour, chalk, carbon black, titanium dioxide.Organic filler is: coal tar, petroleum resin.Functional filler is: thin silver powder, fluorescent material.
Technology of the present invention has been compared following two advantages with the polyurethane sealant that existing technology makes:
A. the sealing agent that makes had both had good caoutchouc elasticity, and good cementability is also arranged simultaneously.
B. the sealing agent that makes in use no longer needs solidifying agent to solidify.
[embodiment 1]
Polyether Glycols (220) 197.0 grams (0.197 mole), 2,4 toluene diisocyanate 34.5 grams (0.397 mole), 1,4-butyleneglycol 7.6 grams (0.169 mole).
At room temperature polyether Glycols is joined 500 milliliters and have agitator, nitrogen interface, the there-necked flask of vaccum exhaust outlet and reinforced voltage stabilizing funnel, heating; Vacuumize; In temperature is decompression dehydration 2 hours under 100～120 ℃ of conditions, it is cooled to 70 ℃ then, connect and change the nitrogen that drying is crossed, constant temperature is 0.5 hour again, drips 2,4 toluene diisocyanate afterwards in flask, temperature be stir constant temperature 1.5 hours under 70 ℃ of conditions after, drip 1 in flask, the 4-butyleneglycol reacts discharging after 0.5 hour.This moment, material was faint yellow viscous liquid, and recording isocyanate content with the Di-n-Butyl Amine method of standard is the 2.45%(weight percent concentration), viscosity is 17600 centipoises.
Above-mentioned prepared aggressiveness 100 grams that give are restrained talcum powder 30 grams, titanium dioxide 10 grams with (the equal drying of following material is handled) calcium carbonate superfine powder 40, dispersed carbon black 1 gram, dioctyl phthalate (DOP) 2 grams, dibutyl tin laurate 0.5 gram, 330 polyethers, 7.6 grams, temperature is under 23 ℃ of conditions, and thorough mixing on three-roller makes the band of glue sample, after it is placed 1～3 day, survey to such an extent that tensile strength is 0.51MPa, tensile elongation is 245%, 90 ° of stripping strength 1.01N/mm.The above-mentioned sealing agent that makes in use no longer needs solidifying agent to solidify, and can directly use.
[embodiment 2]
Polyether Glycols (220) 133.5 grams (0.134 mole), tolylene diisocyanate 28 grams (0.324 mole), 1,4-butyleneglycol 5.1 grams (0.112 mole).
The method for preparing isocyanate-terminated thing is with example 1, and wherein temperature of reaction is 85 ℃, and the reaction times is 2.5 hours, and the chain extension time is 0.8 hour.Survey to such an extent that end-blocking thing isocyanate content is 2.96% at last, viscosity is 18400 centipoises.
With above-mentioned aggressiveness 100 grams and (the equal drying of following material is handled) calcium carbonate superfine powder 40 grams, talcum powder 30 grams, titanium dioxide 10 grams of giving, dispersed carbon black 1 gram, dioctyl phthalate (DOP) 2 grams, stannous octoate 0.5 gram, 330 polyethers, 7.9 grams, in temperature is under 32 ℃ of conditions, thorough mixing on three-roller makes the band of glue sample, places after 1～3 day, survey to such an extent that tensile strength is 300%, 90 ° of stripping strength 1.8N/mm for the 0.6MPa. tensile elongation.The sealing agent product that makes in use no longer needs to solidify with solidifying agent, can directly use.
Above embodiment all shows, the present invention has obtained a kind of viscoelastic polyurethane sealant, has overcome in the conventional art, and viscosity and elasticity can not simultaneous shortcomings, obtained satisfied effect, this kind sealing agent can be widely used in the sealing of materials such as metal, pottery, glass and bonding.
Claims (11)
1, a kind of visco-elasticity polyurethane sealing agent, it is characterized in that at first under 50～90 ℃ of conditions, reacting 1～3 hour by polyisocyanates and polyol, made the aggressiveness that gives of isocyanate-terminated thing again through the dibasic alcohol chain extension in 0.5～1 hour, give aggressiveness and make with solidifying agent, catalyzer, filler thorough mixing under 10～35 ℃ condition again.
2, described according to claim 1, it is characterized in that used dibasic alcohol is 1,4-butyleneglycol, ethylene glycol, 1,6-hexylene glycol and their mixture.
3, described according to claim 1, it is characterized in that used polyisocyanates is: diphenylmethanediisocyanate (MDI), liquefaction diphenylmethanediisocyanate (liquefied mdi), 2,4-tolylene diisocyanate (2,4-TDI), 2, the 6-tolylene diisocyanate (2,6-TDI), many bodies mixture, hydrogenated tolylene diisocyanate (HDI), many benzene of polymethylene polyisocyanates (PAPI) and their mixture of tolylene diisocyanate.
4, described according to claim 1, it is characterized in that used polyol is: two functional group's polyethers, two functional group's polyester, trifunctional polyethers and their mixture.
5, described according to claim 1, the content that gives aggressiveness that it is characterized in that obtained isocyanate-terminated thing is 0.5～15%(weight percent concentration).
6, described according to claim 1, it is characterized in that used solidifying agent is two or three above functional group polyethers, polyamine, imines and their mixtures.
7, described according to claim 1, the content that gives aggressiveness that it is characterized in that obtained isocyanate-terminated thing is 1～6%(weight percent concentration).
8, described according to claim 1, it is characterized in that used catalyzer is organotin, tertiary amine, organic cobalt and their mixture.
9, described according to claim 1, it is characterized in that used filler is mineral filler, organic filler, functional filler.
10, described according to claim 9, it is characterized in that mineral filler is talcum powder, lime carbonate, white carbon black, stone flour, chalk, carbon black, titanium dioxide; Organic filler is coal tar, petroleum resin; Functional filler is thin copper end, thin silver powder, fluorescent material.
11, described according to claim 1, it is characterized in that prepared polyurethane sealant product had both had good adhesiveproperties, have good caoutchouc elasticity again, and product needs no longer in use solidifying agent to solidify.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92113420 CN1087368A (en) | 1992-11-24 | 1992-11-24 | Visco-elasticity polyurethane sealing agent and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92113420 CN1087368A (en) | 1992-11-24 | 1992-11-24 | Visco-elasticity polyurethane sealing agent and manufacturing process thereof |
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| CN1087368A true CN1087368A (en) | 1994-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 92113420 Pending CN1087368A (en) | 1992-11-24 | 1992-11-24 | Visco-elasticity polyurethane sealing agent and manufacturing process thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389164C (en) * | 2006-07-12 | 2008-05-21 | 山东恒冠化工科技有限公司 | Waterproof sealing agent for wires, cables and terminals and its prepn |
| CN101434825B (en) * | 2008-12-12 | 2010-05-12 | 河南永丽化工有限公司 | Bicomponent terminal mercapto polyurethane mildewproof sealant and preparation thereof |
| CN105111396A (en) * | 2015-08-27 | 2015-12-02 | 北京东方雨虹防水技术股份有限公司 | Elastic polyurethane resin grouting material as well as preparation method and application thereof |
| US10316132B2 (en) | 2014-09-04 | 2019-06-11 | Dow Global Technologies Llc | Polyurethane mats |
-
1992
- 1992-11-24 CN CN 92113420 patent/CN1087368A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389164C (en) * | 2006-07-12 | 2008-05-21 | 山东恒冠化工科技有限公司 | Waterproof sealing agent for wires, cables and terminals and its prepn |
| CN101434825B (en) * | 2008-12-12 | 2010-05-12 | 河南永丽化工有限公司 | Bicomponent terminal mercapto polyurethane mildewproof sealant and preparation thereof |
| US10316132B2 (en) | 2014-09-04 | 2019-06-11 | Dow Global Technologies Llc | Polyurethane mats |
| CN105111396A (en) * | 2015-08-27 | 2015-12-02 | 北京东方雨虹防水技术股份有限公司 | Elastic polyurethane resin grouting material as well as preparation method and application thereof |
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