CN111286298A - Polyurethane pouring sealant for ceramic membrane assembly and preparation method thereof - Google Patents
Polyurethane pouring sealant for ceramic membrane assembly and preparation method thereof Download PDFInfo
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- CN111286298A CN111286298A CN202010086549.2A CN202010086549A CN111286298A CN 111286298 A CN111286298 A CN 111286298A CN 202010086549 A CN202010086549 A CN 202010086549A CN 111286298 A CN111286298 A CN 111286298A
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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
- C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
-
- 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
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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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The polyurethane pouring sealant for the ceramic membrane module comprises A, B two components, wherein the component A is a polyol mixture composed of the following raw materials in parts by mass: polymer polyol: 100 parts of (A); coupling agent: 3-10 parts; catalyst: 0.01-3 parts; water removal agent: 5-10 parts; inorganic filler: 0.1-20 parts; defoaming agent: 0.2-2 parts of a solvent; the component B is an-NCO group terminated isocyanate prepolymer generated by the reaction of one or more hydroxyl compounds and one or more isocyanate compounds under certain conditions; the weight ratio of the component A to the component B is 100: (40-100) mixing. The pouring sealant disclosed by the invention has an automatic defoaming function, does not need to be vacuumized for treatment during curing, has no bubbles on the surface after curing, has low shrinkage, high bonding force, good weather resistance and excellent acid and alkali resistance, and is clean, green and environment-friendly.
Description
Technical Field
The invention belongs to the field of polyurethane materials, and particularly relates to a polyurethane pouring sealant for a ceramic membrane component and a preparation method thereof.
Background
With the continuous development of economy, water source pollution becomes a great problem which troubles people to improve the quality of life. The ultrafiltration membrane purification technology uses a high-precision pure physical filter layer, uses pressure difference as a driving force, has high filtration precision, and can intercept impurities such as sludge, bacteria, nitrogen and phosphorus pollutants and the like in water. The ultrafiltration membrane is widely applied to separation of colloidal suspension which is difficult to complete by other separation technologies, and is widely applied to chemical industry, medical industry, food industry, environmental engineering and the like. The flat ceramic membrane component is the most basic unit for forming the membrane tower, the product is mainly used for removing suspended substances in various wastewater treatments, and the effective filtering unit is made of imported high-purity alumina and other additives. The flat plate ceramic ultrafiltration membrane component consists of a ceramic flat plate membrane and polyurethane pouring sealant. The ceramic flat membrane is a filtering material, the polyurethane is a pouring sealing material, the ceramic flat membrane needs to be fixed by using a pouring sealant and poured in a special mould designed according to an application environment, and therefore the ceramic flat membrane becomes a minimum ceramic flat membrane component for application.
Among many pouring sealant systems, polyurethane pouring sealant, epoxy resin pouring sealant and organic silicon pouring sealant are three most widely used pouring sealants at present. The epoxy resin pouring sealant has low price, but has the defects of high brittleness, no high temperature resistance, poor weather resistance and the like. The organosilicon pouring sealant has low strength and poor adhesion, and is not suitable for being adhered with ceramic materials. The polyurethane pouring sealant has the advantages of high strength, high hardness, high toughness, good weather resistance, safety, no toxicity and the like, has a good application prospect in the water treatment industry, but the mainstream polyurethane pouring sealant on the market at present has the defects of low bonding strength, low hardness, slow curing time, poor flowability, difficulty in leveling and the like, and restricts the development of flat ceramic membrane components.
Disclosure of Invention
The invention aims to provide a polyurethane pouring sealant for a ceramic membrane component and a preparation method thereof, and aims to solve the problems of small bonding strength, low hardness, slow curing time, slow flowing, difficulty in leveling and the like in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the polyurethane pouring sealant for the ceramic membrane module comprises A, B two components, and is characterized in that the component A is a polyol mixture composed of the following raw materials in parts by mass:
polymer polyol: 100 parts of (A);
coupling agent: 3-10 parts;
catalyst: 0.01-3 parts;
water removal agent: 5-10 parts;
inorganic filler: 0.1-20 parts;
defoaming agent: 0.2-2 parts of a solvent;
the polymer polyol is one or more of refined castor oil, castor oil modified polyol, bisphenol-based polyol and polyester polyol; the coupling agent is isocyanic acid propyl triethoxy silane or/and isocyanic acid propyl trimethoxy silane; the catalyst is one or more of an organic tin catalyst, an organic zinc catalyst and an organic bismuth catalyst;
in several embodiments, the water scavenger is one or more of a molecular sieve water scavenger and calcium oxide; the inorganic filler is one or more of calcium carbonate, kaolin, carbon black and talcum powder;
in several embodiments, the defoamer is one or more of a BYK series defoamer;
the component B is an-NCO group terminated isocyanate prepolymer generated by the reaction of one or more hydroxyl compounds and one or more isocyanate compounds under certain conditions;
the hydroxyl compound is one or more of polyoxypropylene diol and polyoxypropylene triol; the isocyanate compound is bifunctional isocyanate, preferably one or more of 2, 4-diphenylmethane diisocyanate, 4-diphenylmethane diisocyanate and toluene diisocyanate;
the weight ratio of the component A to the component B is 100: (40-100), preferably 100: (50-70) mixing.
Further, the component A has a viscosity of 200 to 2000cps at 25 ℃ and a hydroxyl value of 50 to 500 mgKOH/g; the viscosity of the component B is 20-300 cps at 25 ℃, and the mass percentage of NCO is 20-30%.
The invention relates to a preparation method of a polyurethane pouring sealant for a ceramic membrane component, which is characterized by comprising the following steps of:
(1) preparing a component A: sequentially adding the defoaming agent, the coupling agent, the water removing agent, the catalyst and the inorganic filler into the polymer polyol with qualified water content at room temperature, stirring and mixing uniformly, and discharging at 30-60 ℃;
(2) preparing a component B: adding the hydroxyl compound and the isocyanate compound into a reaction kettle at room temperature, slowly heating to 70-110 ℃ under continuous stirring, introducing protective gas, and reacting for 2-4 h to dehydrate; after the NCO value is measured to reach the standard, cooling to 30-60 ℃, continuing stirring for 1-3 h, and filtering to obtain a component B;
(3) mixing the component A and the component B according to the weight ratio of 100: (40-100) and mixing to obtain the polyurethane pouring sealant for the ceramic membrane component.
The stirring speed in the step (2) is 200-800 r/min; the protective gas is nitrogen or inert gas.
The preferable discharging temperature in the steps (1) and (2) is 40 ℃, a sieve with 80-200 meshes is used for filtering during discharging, and the component A and the component B are respectively sealed and stored.
The polyurethane potting adhesive for the ceramic membrane component has a high curing speed, can achieve an adhesive effect within 30min at normal temperature, can achieve complete curing within 8h, and can solve the problem of slow curing of common polyurethane potting adhesives, so that the production efficiency is improved; the glue has an automatic defoaming function, the glue is not required to be vacuumized for treatment during curing, no bubbles exist on the surface after curing, and the film group is more attractive; the glue also has low shrinkage, high bonding force, good weather resistance and excellent acid and alkali resistance, and is a clean, green and environment-friendly pouring sealant. The raw materials used in the method are safe and nontoxic, the cost is low, the formula design is scientific and reasonable, the method is environment-friendly and pollution-free, and the processing performance is good.
Detailed Description
The technical solutions of the present invention will be clearly and completely described below, and all other embodiments obtained by those skilled in the art without any creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
The polyurethane pouring sealant for the ceramic membrane component is prepared by the following specific steps:
(1) preparing a component A:
adding 100 parts by mass of castor oil modified polyol (produced by Shanghai Jing Nissan New materials Co., Ltd.) into a reaction kettle, heating to 110 ℃, stirring while vacuumizing and dehydrating for 2 hours, and controlling the water content to be below 200 ppm; cooling the temperature in the reaction kettle to room temperature, sequentially adding 0.5 part of BYK-535, 4 parts of isocyanatopropyl trimethoxy silane, 8 parts of molecular sieve dewatering agent (produced by Shanghai Cyclo molecular sieves Co., Ltd.), 0.2 part of organic zinc catalyst (produced by Shanghai Desheng chemical Co., Ltd.), and 0.5 part of carbon black, stirring for 2h until the mixture is uniformly mixed, cooling to 40 ℃ to obtain a component A, wherein the sampling viscosity is 1200cps, and the hydroxyl value is 480 mgKOH/g;
(2) preparing a component B:
adding 50 parts by mass of 2, 4-diphenylmethane diisocyanate and 28 parts by mass of dehydrated qualified polyoxypropylene glycol into a reaction kettle at room temperature, continuously stirring, slowly heating to 80 ℃ and reacting; introducing nitrogen and stirring for 3 hours, cooling the temperature to 40 ℃ after the NCO value is tested to be qualified, then continuously stirring for 2 hours, and filtering to obtain a component B; the measured sample had a viscosity of 150cps and an NCO value of 27%;
(3) preparing a polyurethane pouring sealant:
mixing the component A and the component B according to the ratio of 100: and mixing uniformly according to the mass ratio of 60 to obtain the polyurethane pouring sealant, which is used for pouring and bonding the flat ceramic membrane.
Example 2
The polyurethane pouring sealant for the ceramic membrane component is prepared by the following specific steps:
(1) preparing a component A:
adding 35 parts by mass of refined castor oil and 65 parts by mass of polyester polyol (produced by Nanjing Jinling Spiran chemical Co., Ltd.) into a reaction kettle, heating to 120 ℃, and vacuumizing and dehydrating for 3 hours while stirring, wherein the water content is controlled below 200 ppm; cooling the temperature in the reaction kettle to room temperature, sequentially adding 1 part of BYK-066, 3 parts of isocyanatopropyltriethoxysilane, 6 parts of calcium oxide, 0.1 part of organic bismuth catalyst (produced by Shanghai Deyin chemical Co., Ltd.), and 10 parts of silicon dioxide, uniformly stirring for 2h, cooling to 45 ℃ to obtain a component A, wherein the sampling viscosity is 900cps, and the hydroxyl value is 350 mgKOH/g;
(2) preparing a component B:
adding 54 parts by mass of 4, 4-diphenylmethane diisocyanate and 34 parts by mass of dehydrated qualified polyoxypropylene glycol into a reaction kettle at room temperature, and slowly heating to 90 ℃ for reaction; introducing nitrogen and stirring for 2h, cooling to 50 ℃, then continuing stirring for 1h, and filtering to obtain a component B, wherein the sampling viscosity is 300cps, and the NCO value is 25%;
(3) preparing a polyurethane pouring sealant:
mixing the component A and the component B according to the ratio of 100: 65, obtaining the polyurethane pouring sealant for potting and bonding the flat ceramic membrane.
Example 3
The polyurethane pouring sealant for the ceramic membrane component is prepared by the following specific steps:
(1) preparing a component A:
adding 40 parts by mass of castor oil modified polyol (produced by Shanghai Jing Nippon Material Co., Ltd.) and 60 parts by mass of polyester polyol (produced by Nanjing Jinling Spatan chemical Co., Ltd.) into a reaction kettle, heating to 80 ℃, stirring while vacuumizing and dehydrating for 4 hours, and controlling the water content to be below 200 ppm; cooling the temperature in the reaction kettle to room temperature, sequentially adding 0.3 part of BYK-204, 4 parts of isocyanatopropyl trimethoxy silane, 6 parts of molecular sieve dewatering agent (produced by Shanghai Cyclo molecular sieves Co., Ltd.), 0.3 part of organic zinc catalyst (produced by Shanghai Desheng chemical Co., Ltd.), and 0.2 part of carbon black, stirring for 2h until the mixture is uniformly mixed, cooling to 50 ℃, and obtaining a component A, wherein the sampling viscosity is 900cps, and the hydroxyl value is 435 mgKOH/g;
(2) preparing a component B:
adding 45 parts by mass of 2, 4-diphenylmethane diisocyanate and 25 parts by mass of dehydrated qualified polyoxypropylene glycol into a reaction kettle at room temperature, and slowly heating to 100 ℃ for reaction; introducing nitrogen and stirring for 2 hours, cooling the temperature to 55 ℃ after the NCO value is tested to be qualified, continuing stirring for 3 hours, and filtering to obtain a component B; the measured sample viscosity was 130cps, and the NCO value was 23%;
(3) preparing a polyurethane pouring sealant:
mixing the component A and the component B according to the ratio of 100: 55 to obtain the polyurethane pouring sealant for potting and bonding the flat ceramic membrane.
In order to further verify the performance of the polyurethane pouring sealant, the pouring sealant prepared in the embodiment 1-3 is placed at normal temperature for 7 days, the surface drying time and the curing time are measured according to a method for measuring the storage life of GB-T7123.2-2002 adhesive, the hardness is measured according to a method for testing the indentation hardness of a GB/T531-1999 rubber pocket durometer, and the experimental results are shown in Table 1:
TABLE 1 test results of examples 1 to 3
| Item | Time to surface dry | Curing time | Shore hardness |
| Example 1 | 16min | 8h | 82D |
| Example 2 | 18min | 11h | 75D |
| Example 3 | 26min | 15h | 71D |
As can be seen from the table, the surface drying time of the polyurethane potting adhesive for the flat-plate ceramic membrane module prepared in the embodiment 1-3 is 16-26 min (less than 1h), the curing time is 8-15 h (less than 24h), the hardness is 71D-82 (higher hardness), the polyurethane potting adhesive is better than similar products on the market, and the sample prepared in the embodiment 1 has better performance.
Claims (10)
1. The polyurethane pouring sealant for the ceramic membrane module comprises A, B two components, and is characterized in that the component A is a polyol mixture composed of the following raw materials in parts by mass:
polymer polyol: 100 parts of (A);
coupling agent: 3-10 parts;
catalyst: 0.01-3 parts;
water removal agent: 5-10 parts;
inorganic filler: 0.1-20 parts;
defoaming agent: 0.2-2 parts of a solvent;
the component B is an-NCO group terminated isocyanate prepolymer generated by the reaction of one or more hydroxyl compounds and one or more isocyanate compounds under certain conditions;
the weight ratio of the component A to the component B is 100: (40-100) mixing.
2. The polyurethane potting adhesive for ceramic membrane modules as claimed in claim 1, wherein the weight ratio of the component A to the component B is 100: (50-70) mixing.
3. The polyurethane potting adhesive for ceramic membrane modules as claimed in claim 1, wherein the polymer polyol is one or more of refined castor oil, castor oil-modified polyol, bisphenol-based polyol, and polyester polyol; the coupling agent is isocyanic acid propyl triethoxy silane or/and isocyanic acid propyl trimethoxy silane; the catalyst is one or more of an organic tin catalyst, an organic zinc catalyst and an organic bismuth catalyst.
4. The polyurethane potting adhesive for ceramic membrane modules as claimed in claim 1, wherein the water scavenger is one or more of a molecular sieve water scavenger and calcium oxide; the inorganic filler is one or more of calcium carbonate, kaolin, carbon black and talcum powder.
5. The polyurethane potting adhesive for ceramic membrane modules as claimed in claim 1, wherein the defoaming agent is one or more of BYK series defoaming agents.
6. The polyurethane potting adhesive for ceramic membrane modules as claimed in claim 1, wherein the hydroxyl compound is one or more of polyoxypropylene diol and polyoxypropylene triol; the isocyanate compound is difunctional isocyanate.
7. The polyurethane potting adhesive for ceramic membrane modules as claimed in any one of claims 1 to 6, wherein the component A has a viscosity of 200 to 2000cps at 25 ℃ and a hydroxyl value of 50 to 500 mgKOH/g; the viscosity of the component B is 20-300 cps at 25 ℃, and the mass percentage of NCO is 20-30%.
8. A preparation method of the polyurethane pouring sealant for the ceramic membrane module as claimed in any one of claims 1 to 6, comprising the following steps:
(1) preparing a component A: sequentially adding the defoaming agent, the coupling agent, the water removing agent, the catalyst and the inorganic filler into the polymer polyol with qualified water content at room temperature, stirring and mixing uniformly, and discharging at 30-60 ℃;
(2) preparing a component B: adding the hydroxyl compound and the isocyanate compound into a reaction kettle at room temperature, slowly heating to 70-110 ℃ under continuous stirring, introducing protective gas, and reacting for 2-4 h to dehydrate; after the NCO value is measured to reach the standard, cooling to 30-60 ℃, continuing stirring for 1-3 h, and filtering to obtain a component B;
(3) mixing the component A and the component B according to the weight ratio of 100: (40-100) and mixing to obtain the polyurethane pouring sealant for the ceramic membrane component.
9. The preparation method according to claim 8, wherein the stirring speed in the step (2) is 200-800 r/min; the protective gas is nitrogen or inert gas.
10. The preparation method according to claim 8, wherein the discharging temperature in the steps (1) and (2) is preferably 40 ℃, the discharging is carried out by filtering with a sieve of 80-200 meshes, and the component A and the component B are respectively stored in a sealed manner.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010086549.2A CN111286298A (en) | 2020-02-11 | 2020-02-11 | Polyurethane pouring sealant for ceramic membrane assembly and preparation method thereof |
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| CN202010086549.2A CN111286298A (en) | 2020-02-11 | 2020-02-11 | Polyurethane pouring sealant for ceramic membrane assembly and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112724914A (en) * | 2020-12-29 | 2021-04-30 | 烟台德邦科技股份有限公司 | Low-viscosity high-heat-conductivity flame-retardant two-component polyurethane pouring sealant and preparation method thereof |
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| CN107083229A (en) * | 2017-05-12 | 2017-08-22 | 南京威邦新材料有限公司 | A kind of preparation method of membrane for water treatment bi-component polyurethane pouring sealant |
| CN108276949A (en) * | 2018-01-31 | 2018-07-13 | 广州吉必盛科技实业有限公司 | Dual-component polyurethane casting glue and preparation method thereof and application method |
| CN109111893A (en) * | 2018-06-27 | 2019-01-01 | 上海汉司实业有限公司 | A kind of Domestic water purifying hollow-fibre membrane polyurethane pouring sealant and preparation method thereof |
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2020
- 2020-02-11 CN CN202010086549.2A patent/CN111286298A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107083229A (en) * | 2017-05-12 | 2017-08-22 | 南京威邦新材料有限公司 | A kind of preparation method of membrane for water treatment bi-component polyurethane pouring sealant |
| CN108276949A (en) * | 2018-01-31 | 2018-07-13 | 广州吉必盛科技实业有限公司 | Dual-component polyurethane casting glue and preparation method thereof and application method |
| CN109111893A (en) * | 2018-06-27 | 2019-01-01 | 上海汉司实业有限公司 | A kind of Domestic water purifying hollow-fibre membrane polyurethane pouring sealant and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112724914A (en) * | 2020-12-29 | 2021-04-30 | 烟台德邦科技股份有限公司 | Low-viscosity high-heat-conductivity flame-retardant two-component polyurethane pouring sealant and preparation method thereof |
| CN112724914B (en) * | 2020-12-29 | 2022-10-21 | 烟台德邦科技股份有限公司 | Low-viscosity high-heat-conductivity flame-retardant two-component polyurethane pouring sealant and preparation method thereof |
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Application publication date: 20200616 |