CN113773782A - Preparation of high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant - Google Patents
Preparation of high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6603—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6607—Compounds of groups C08G18/42, C08G18/48, or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
Abstract
The invention relates to a preparation method of high-temperature-resistant hydrolysis-resistant polyurethane, which is suitable for encapsulating a hollow fiber membrane component. The invention provides a dual curing strategy, which utilizes a conventional curing agent and latent curing agent cooperation strategy to realize the normal-temperature partial curing and medium-temperature complete curing of the polyurethane pouring sealant, overcomes the problems of film tube wire burning, wire climbing and the like caused by long curing time or too fast curing and serious heat release of the polyurethane pouring sealant, and fully shortens the curing time by medium-temperature curing. The cured polyurethane pouring sealant has excellent heat resistance and hydrolysis resistance. The preparation method is simple and easy for industrial operation, and widens the application range of the polyurethane pouring sealant.
Description
Technical Field
The invention relates to a preparation method of a high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant, belongs to the field of polymer synthesis, and is suitable for pouring and sealing a hollow fiber membrane component.
Background
The hollow fiber membrane is applied to related engineering in the form of a membrane component, and when the hollow fiber membrane is made into the membrane component, a large amount of pouring sealant is used for sealing the end. The interaction of the self-characteristics of the pouring sealant, the hollow fiber membrane filaments and the membrane module shell can influence the performance of the membrane module in the actual application process. Therefore, the selection of proper pouring sealant is very important for preparing the hollow fiber ultrafiltration membrane component.
At present, polyurethane and epoxy type pouring sealant are mainly used for the membrane assembly, but the epoxy resin used by the traditional pouring material has the problems of higher hardness, easy brittle fracture, incapability of repairing and the like. The polyurethane pouring sealant overcomes the defect of brittleness of the epoxy resin, and is successfully and widely applied in various industries by the unique comprehensive performance. After the A, B two components of the polyurethane pouring sealant are fully mixed and reacted, the chain structure is increased, and an elastomer material similar to rubber in performance and structure is formed. The elastomer is tightly coated around the hollow fiber ultrafiltration membrane component, so that the sealing effect can be achieved, and further the dustproof, waterproof, shockproof and fixing effects can be achieved.
At present, the polyurethane pouring sealant is easily influenced by moisture in air, moisture in a membrane tube and the like, so that a large amount of bubbles are generated in the curing process, and the actual service life of a membrane component is further influenced. In addition, some hollow fiber membrane modules applied to special use scenes often need high-temperature-resistant and hydrolysis-resistant pouring sealants, and the common polyurethane pouring sealant is sensitive to moisture at the temperature below 80 ℃ for a long time, and more importantly, the polyurethane pouring sealant is long in curing time or too fast in curing and serious in heat release, so that membrane tubes burn wires, climb wires and the like. Therefore, the development of a novel high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant is very important.
Disclosure of Invention
The invention aims to solve the problems, provides a dual curing strategy, and can prepare polyurethane pouring sealant suitable for hollow fiber membrane components, the pouring sealant solves the problem of serious quick heat release in the traditional curing time, and the cured pouring sealant has excellent heat resistance and hydrolysis resistance, and is suitable for hollow fiber membrane components in special use scenes, such as treatment of high-temperature wastewater.
The invention relates to a preparation method of a high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant, which is characterized by comprising the following steps: the preparation method comprises the preparation of the component A and the component B, and the component A and the component B are mixed according to the proportion of 1: and (3) mixing the components in a mass ratio of 0.5-2, and uniformly stirring to obtain the bi-component high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant.
The preparation method of the high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant comprises the following steps:
(1) preparation of component A:
mixing polypropylene glycol and polycarbonate diol according to a certain proportion, vacuumizing, and degassing for 1-3 h at 100-120 ℃; (2) stopping vacuumizing, cooling to 40-50 ℃, adding metered MDI and a small amount of diluent, uniformly stirring, and then heating to 60-80 ℃ for reaction for 0.5-3 hours; (3) cooling to 40-50 ℃, vacuum degassing for 30min to obtain a prepolymer, and sealing for later use;
(2) preparation of the component B:
adding and mixing a chain extender, a catalyst, a latent curing agent and a filler according to a ratio, adding a small amount of a diluent at the same time, mixing to adjust the viscosity, heating, controlling the temperature to be 100-120 ℃, degassing in vacuum for 1-3 hours, cooling to 40-50 ℃, uniformly mixing, and sealing for later use;
(3) a, B mixing of components:
mixing the A, B components according to a certain proportion at room temperature, standing for 2-3 days at room temperature, and then testing or standing for 6-10 h at room temperature, and curing for 1-3 h at 60-80 ℃.
The polypropylene glycol is at least one of polypropylene glycols with average molecular weights of 400, 600, 1000, 1500, 2000, 3000, 4000, 6000 and 8000;
the polycarbonate dihydric alcohol is at least one of polycarbonate dihydric alcohols with average molecular weights of 500, 1000, 2000 and 3000; the diluent is at least one of benzene, ester and ketone;
the chain extender is at least one of 3,3 '-dichloro-4, 4' -diaminodiphenylmethane, trimethylolpropane, 1, 4-butanediol, triethanolamine and methyldiethanolamine;
the catalyst is at least one of lead isooctanoate, dibutyltin dilaurate, stannous octoate and tertiary amine;
the latent curing agent is at least one of a PZ-525 curing agent and a PZ-005 curing agent;
the filler is at least one of mica, calcium carbonate, titanium dioxide, clay, cellulose, silicon dioxide, aluminum oxide, talcum powder, carbon black, barite and functional nano particles.
The diluent is mainly used for adjusting the viscosity of the A and B components.
The mass ratio of the polypropylene glycol to the polycarbonate diol is 20: 1-1: 1;
the chain extender accounts for 3-10 wt%, the catalyst accounts for 0.1-0.5 wt%, the latent curing agent accounts for 0.1-0.5 wt%, and the filler accounts for 0.5-10 wt%.
In the step of preparing the component A, the viscosity of the prepared component A is 500-2000 mPa & s at the temperature of 25 ℃.
In the step of preparing the component B, the viscosity of the prepared component B is 500-2000 mPa & s at the temperature of 25 ℃.
The obtained polyurethane pouring sealant has excellent heat resistance and hydrolysis resistance, and T of the pouring sealant5％The decomposition temperature reaches more than 310 ℃, the Shore hardness reaches more than 80A, and the water absorption rate is less than or equal to 3.5 percent.
The invention has the beneficial effects that: by utilizing a conventional curing agent and latent curing agent cooperative strategy, the normal-temperature partial curing and medium-temperature complete curing of the polyurethane pouring sealant are realized, the problems of film tube wire burning, wire climbing and the like caused by long curing time or too fast curing and serious heat release of the polyurethane pouring sealant are solved, and the curing time is fully shortened by medium-temperature curing. According to the invention, by selecting proper raw materials, auxiliaries and preparation processes, the prepared polyurethane A, B adhesive has proper viscosity, is convenient to operate, has excellent heat resistance and hydrolysis resistance after curing, and widens the application range of the polyurethane pouring adhesive.
Detailed Description
The following examples of the present invention are described in connection with the following examples, which are intended to further illustrate features and advantages of the present invention, and are not to be construed as limiting the claims in any way.
Experimental case 1:
in the embodiment of the invention, the preparation method of the high-temperature-resistant hydrolysis-resistant polyurethane specifically comprises the following steps:
(1) preparation of component A:
mixing 25 parts of polypropylene glycol with the average molecular weight of 600 and 5 parts of polycarbonate diol with the average molecular weight of 1000, vacuumizing, and degassing in vacuum at 100 ℃ for 3 hours; (2) stopping vacuumizing, cooling to 40 ℃, adding 11 parts of MDI and 3 parts of acetone, uniformly stirring, and then heating to 60 ℃ for reaction for 1 hour; (3) cooling to 40 deg.C, vacuum degassing for 30min to obtain prepolymer, and sealing;
(2) preparation of the component B:
adding 0.41 part of chain extender 1, 4-butanediol, 0.005 part of dibutyltin dilaurate, 0.005 part of PZ-005 curing agent and 0.1 part of silicon dioxide in proportion, mixing, adding 5 parts of acetone at the same time, mixing to adjust viscosity, heating, controlling the temperature at 100 ℃, degassing in vacuum for 1h, cooling to 40 ℃, uniformly mixing and sealing for later use;
(3) a, B mixing of components:
mixing A, B components at room temperature according to a ratio of 1:1, standing at room temperature for 3d, and testing, wherein the label is sample 1-3 d; standing at room temperature for 8h, curing at 60 deg.C for 3h, and labeling as sample 1-11 h.
Experimental case 2:
in the embodiment of the invention, the preparation method of the high-temperature-resistant hydrolysis-resistant polyurethane specifically comprises the following steps:
(1) preparation of component A:
mixing 32 parts of polypropylene glycol with the average molecular weight of 600 and 3.2 parts of polycarbonate diol with the average molecular weight of 1000, vacuumizing, and degassing for 3 hours at 100 ℃; (2) stopping vacuumizing, cooling to 40 ℃, adding 12.7 parts of MDI and 3 parts of acetone, uniformly stirring, and then heating to 60 ℃ for reaction for 1 hour; (3) cooling to 40 deg.C, vacuum degassing for 30min to obtain prepolymer, and sealing;
(2) preparation of the component B:
adding 0.48 part of chain extender 1, 4-butanediol, 0.005 part of dibutyltin dilaurate, 0.005 part of PZ-005 curing agent and 0.1 part of silicon dioxide in proportion, mixing, adding 6 parts of acetone at the same time, mixing to adjust viscosity, heating, controlling the temperature at 100 ℃, degassing in vacuum for 1h, cooling to 40 ℃, uniformly mixing and sealing for later use;
(3) a, B mixing of components:
mixing A, B components at room temperature according to a ratio of 1:1, standing at room temperature for 3d, and testing, wherein the label is sample 2-3 d; standing at room temperature for 8h, curing at 60 deg.C for 3h, and labeling as sample 2-11 h.
Experimental case 3:
in the embodiment of the invention, the preparation method of the high-temperature-resistant hydrolysis-resistant polyurethane specifically comprises the following steps:
(1) preparation of component A:
mixing 24 parts of polypropylene glycol with the average molecular weight of 600 and 8 parts of polycarbonate diol with the average molecular weight of 1000, vacuumizing, and degassing in vacuum at 100 ℃ for 3 hours; (2) stopping vacuumizing, cooling to 40 ℃, adding 32.3 parts of MDI and 3 parts of toluene, uniformly stirring, and then heating to 60 ℃ for reaction for 1 hour; (3) cooling to 40 deg.C, vacuum degassing for 30min to obtain prepolymer, and sealing;
(2) preparation of the component B:
adding 0.32 part of chain extender 1, 4-butanediol, 0.005 part of dibutyltin dilaurate, 0.005 part of PZ-005 curing agent and 0.1 part of silicon dioxide in proportion, mixing, adding 6 parts of acetone at the same time, mixing to adjust viscosity, heating, controlling the temperature at 100 ℃, degassing in vacuum for 1h, cooling to 40 ℃, uniformly mixing and sealing for later use;
(3) a, B mixing of components:
mixing A, B components at room temperature according to a ratio of 1:1, standing at room temperature for 3d, and testing, wherein the label is sample 3-3 d; standing at room temperature for 8h, curing at 60 deg.C for 3h, and labeling as sample 3-11 h.
Experimental case 4:
in the embodiment of the invention, the preparation method of the high-temperature-resistant hydrolysis-resistant polyurethane specifically comprises the following steps:
(1) preparation of component A:
mixing 24 parts of polypropylene glycol with the average molecular weight of 1000 and 8 parts of polycarbonate diol with the average molecular weight of 1000, vacuumizing, and degassing in vacuum at 100 ℃ for 3 hours; (2) stopping vacuumizing, cooling to 40 ℃, adding 32.3 parts of MDI and 3 parts of acetone, uniformly stirring, and then heating to 60 ℃ for reaction for 1 hour; (3) cooling to 40 deg.C, vacuum degassing for 30min to obtain prepolymer, and sealing;
(2) preparation of the component B:
adding 0.32 part of chain extender 1, 4-butanediol, 0.005 part of dibutyltin dilaurate, 0.005 part of PZ-005 curing agent and 0.1 part of silicon dioxide in proportion, mixing, adding 6 parts of acetone at the same time, mixing to adjust viscosity, heating, controlling the temperature at 100 ℃, degassing in vacuum for 1h, cooling to 40 ℃, uniformly mixing and sealing for later use;
(3) a, B mixing of components:
the A, B components were mixed at 1:1 at room temperature, left at room temperature for 8h, cured at 60 ℃ for 3h, and labeled as sample 4.
Experimental case 5:
in the embodiment of the invention, the preparation method of the high-temperature-resistant hydrolysis-resistant polyurethane specifically comprises the following steps:
(1) preparation of component A:
mixing 24 parts of polypropylene glycol with the average molecular weight of 2000 and 8 parts of polycarbonate diol with the average molecular weight of 1000, vacuumizing, and degassing in vacuum at 100 ℃ for 3 hours; (2) stopping vacuumizing, cooling to 40 ℃, adding 32.3 parts of MDI and 5 parts of acetone, uniformly stirring, and then heating to 60 ℃ for reaction for 1 hour; (3) cooling to 40 deg.C, vacuum degassing for 30min to obtain prepolymer, and sealing;
(2) preparation of the component B:
adding 0.32 part of chain extender 1, 4-butanediol, 0.005 part of dibutyltin dilaurate, 0.005 part of PZ-005 curing agent and 0.1 part of silicon dioxide in proportion, mixing, adding 7 parts of acetone at the same time, mixing to adjust viscosity, heating, controlling the temperature at 100 ℃, degassing for 1h in vacuum, cooling to 40 ℃, uniformly mixing and sealing for later use;
(3) a, B mixing of components:
a, B parts were mixed at 1:1 at room temperature, left at room temperature for 8h, cured at 60 ℃ for 3h, and labeled as sample 5.
Experimental case 6:
in the embodiment of the invention, the preparation method of the high-temperature-resistant hydrolysis-resistant polyurethane specifically comprises the following steps:
(1) preparation of component A:
mixing 24 parts of polypropylene glycol with the average molecular weight of 2000 and 8 parts of polycarbonate diol with the average molecular weight of 2000, vacuumizing, and degassing in vacuum at 100 ℃ for 3 hours; (2) stopping vacuumizing, cooling to 40 ℃, adding 32.3 parts of MDI and 5 parts of acetone, uniformly stirring, and then heating to 60 ℃ for reaction for 1 hour; (3) cooling to 40 deg.C, vacuum degassing for 30min to obtain prepolymer, and sealing;
(2) preparation of the component B:
adding 0.32 part of chain extender 1, 4-butanediol, 0.005 part of dibutyltin dilaurate, 0.005 part of PZ-005 curing agent and 0.1 part of talcum powder in proportion, mixing, adding 5 parts of acetone at the same time, mixing to adjust viscosity, heating, controlling the temperature at 100 ℃, degassing in vacuum for 1h, cooling to 40 ℃, uniformly mixing, and sealing for later use;
(3) a, B mixing of components:
the A, B components were mixed at 1:1 at room temperature, left at room temperature for 8h, cured at 60 ℃ for 3h, and labeled as sample 6.
Application example: using the potting compound obtained in the examples, A, B component viscosity was measured, and the temperature resistance and hardness of the potting compound were measured, and the water absorption test was calculated by substituting the change before and after the mass after the potting compound was immersed in 40 ℃ distilled water for 48 hours into a water absorption formula. The result shows that the pouring sealant T5％The thermal decomposition temperature is higher than 310 ℃, the thermal decomposition temperature has excellent temperature resistance, the water absorption rate is low, the hardness is high, and the hardness is basically not changed before and after water absorption.
Claims (9)
1. The preparation method of the high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant is characterized in that the preparation of the polyurethane pouring sealant comprises the preparation of a component A and a component B, and when the polyurethane pouring sealant is used, the component A and the component B are mixed according to the proportion of 1: 0.5-2, then standing at room temperature for 2-3 days, and fully curing or standing at room temperature for 6-10 h, and curing at 60-80 ℃ for 1-3 h;
the preparation method of the high-temperature-resistant hydrolysis-resistant polyurethane pouring sealant comprises the following steps:
preparation of component A: mixing polypropylene glycol and polycarbonate diol according to a certain proportion, vacuumizing, and degassing for 1-3 h at 100-120 ℃; (2) stopping vacuumizing, cooling to 40-50 ℃, adding metered MDI and a small amount of diluent, uniformly stirring, and then heating to 60-80 ℃ for reaction for 0.5-3 hours; (3) cooling to 40-50 ℃, vacuum degassing for 30min to obtain a prepolymer, and sealing for later use;
preparation of the component B: adding and mixing the chain extender, the catalyst, the latent curing agent and the filler according to a proportion, simultaneously adding a small amount of diluent, mixing to adjust the viscosity, heating, controlling the temperature to be 100-120 ℃, degassing in vacuum for 1-3 hours, cooling to 40-50 ℃, uniformly mixing, and sealing for later use.
2. The polypropylene glycol of claim 1, wherein the polypropylene glycol is at least one of polypropylene glycols having an average molecular weight of 400, 600, 1000, 1500, 2000, 3000, 4000, 6000, 8000; the polycarbonate dihydric alcohol is at least one of polycarbonate dihydric alcohols with average molecular weights of 500, 1000, 2000 and 3000; the diluent is at least one of benzene, ester and ketone; the chain extender is at least one of 3,3 '-dichloro-4, 4' -diaminodiphenylmethane, trimethylolpropane, 1, 4-butanediol, triethanolamine and methyldiethanolamine; the catalyst is at least one of lead isooctanoate, dibutyltin dilaurate, stannous octoate and tertiary amine.
3. The composition according to claim 1, wherein the latent curing agent is at least one of a PZ-525 curing agent and a PZ-005 curing agent.
4. The method of claim 1, wherein the filler is at least one of mica, calcium carbonate, titanium dioxide, clay, cellulose, silica, alumina, talc, carbon black, barite, and functional nanoparticles.
5. The polypropylene glycol and polycarbonate diol composition according to claim 1, wherein the mass ratio of the polypropylene glycol to the polycarbonate diol is 20: 1-1: 1.
6. The method according to claim 1, wherein the chain extender is 3 to 10% by mass, the catalyst is 0.1 to 0.5% by mass, the latent curing agent is 0.1 to 0.5% by mass, and the filler is 0.5 to 10% by mass.
7. The method according to claim 1, wherein in the step of preparing the component A, the prepared component A has a viscosity of 500-2000 mPa-s at a temperature of 25 ℃.
8. The method according to claim 1, wherein in the step of preparing the component B, the prepared component B has a viscosity of 500 to 2000 mPa-s at a temperature of 25 ℃.
9. The method as claimed in claim 1, wherein the polyurethane casting compound prepared has excellent heat resistance and hydrolysis resistance, T5％The decomposition temperature of the hollow fiber membrane reaches more than 310 ℃, the Shore hardness reaches more than 80A, the water absorption rate is less than or equal to 3.5 percent, and the hollow fiber membrane can be used as a hollow fiber membrane pouring sealant.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006043386A1 (en) * | 2004-10-19 | 2006-04-27 | Nippon Polyurethane Industry Co., Ltd. | Polyurethane resin forming composition, process for production of sealant, and process for production of hollow-fiber membrane modules |
| CN107142068A (en) * | 2017-04-10 | 2017-09-08 | 广东普赛达密封粘胶有限公司 | A kind of heat cure one-component polyurethane compositions and preparation method thereof |
| WO2021110087A1 (en) * | 2019-12-05 | 2021-06-10 | 广东盈通新材料有限公司 | Latent mono-component polyurethane hot melt glue, preparation method therefor and glue film |
-
2021
- 2021-11-01 CN CN202111281289.5A patent/CN113773782B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006043386A1 (en) * | 2004-10-19 | 2006-04-27 | Nippon Polyurethane Industry Co., Ltd. | Polyurethane resin forming composition, process for production of sealant, and process for production of hollow-fiber membrane modules |
| CN107142068A (en) * | 2017-04-10 | 2017-09-08 | 广东普赛达密封粘胶有限公司 | A kind of heat cure one-component polyurethane compositions and preparation method thereof |
| WO2021110087A1 (en) * | 2019-12-05 | 2021-06-10 | 广东盈通新材料有限公司 | Latent mono-component polyurethane hot melt glue, preparation method therefor and glue film |
Non-Patent Citations (2)
| Title |
|---|
| 刘益军: "《聚氨酯原料及助剂手册》", 30 April 2005 * |
| 李波等: "不同潜固化型单组分聚氨酯密封胶制备及其性能研究", 《中国建筑防水》 * |
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