CN112724363B - Polyurethane pouring sealant for submarine cable pouring and sealing and preparation method thereof - Google Patents
Polyurethane pouring sealant for submarine cable pouring and sealing and preparation method thereof Download PDFInfo
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- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
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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
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three 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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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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
- C08G18/721—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80
- C08G18/724—Combination of aromatic polyisocyanates with (cyclo)aliphatic polyisocyanates
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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
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
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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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- Polyurethanes Or Polyureas (AREA)
Abstract
The invention belongs to the technical field of polyurethane products, and particularly relates to a polyurethane pouring sealant for submarine cable pouring and a preparation method thereof. The polyurethane pouring sealant comprises a component A and a component B, wherein the component A is composed of an amine chain extender, polyoxypropylene ether polyol, a catalyst and an anti-aging agent, and the component B is composed of vegetable oil polyol, polytetrahydrofuran ether polyol and diisocyanate. The polyurethane elastomer product with the Shore A hardness of 70-90, long operable time and no need of high-temperature curing is obtained after the component A and the component B are cured at room temperature, the production process is simple, the related performance standards of the industry are met, and the polyurethane elastomer product has a wide application prospect in the cable encapsulation industry.
Description
Technical Field
The invention belongs to the technical field of polyurethane products, and particularly relates to a polyurethane pouring sealant for submarine cable pouring and a preparation method thereof.
Background
Submarine cables are wires wrapped by insulating materials, are laid under the sea and rivers and are used for electric signal transmission. The marine environment is a complex corrosive environment, seawater is a strong corrosive medium, and simultaneously generates low-frequency reciprocating stress and impact on metal components, and generates a direct or indirect acceleration effect on the corrosion process, so that the enhancement of the corrosion resistance of the submarine cable is of great importance. Polyurethane elastomers enter various fields in life by virtue of excellent performance after being produced, and polyurethane pouring sealant serving as a composite special pouring material is increasingly applied to various industries due to the characteristics of good elasticity, insulation, mildew resistance, shock resistance, corrosion resistance, high and low temperature impact resistance and the like. After the polyurethane potting adhesive is cured, the influence of external environmental conditions on internal components can be reduced, the components can be ensured to operate well in a standard working environment, the stability of the components is improved, and the service life of the components is prolonged. Meanwhile, the polyurethane pouring sealant can be cured at room temperature without huge heating curing equipment, so that the damage to electronic components caused by overhigh temperature is avoided, and the polyurethane pouring sealant becomes an ideal pouring material in the electronic communication industry.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the defects of the prior art, the polyurethane pouring sealant for submarine cable pouring is long in operation time, and excellent in product hydrolysis resistance, chemical resistance and mechanical property, and the preparation method thereof are provided.
The polyurethane pouring sealant for the submarine cable pouring comprises a component A and a component B, wherein the component A consists of an amine chain extender, polyoxypropylene ether polyol, a catalyst and an anti-aging agent, and the component B consists of vegetable oil polyol, polytetrahydrofuran ether polyol and diisocyanate; wherein the component A comprises the following raw materials in percentage by weight:
the component B comprises the following raw materials in percentage by weight:
19-45% of polytetrahydrofuran ether polyol;
0-20% of vegetable oil polyol;
35-62% of diisocyanate.
The amine chain extender is one or more than one of 3,3 '-dichloro-4, 4' -diaminodiphenylmethane, 3, 5-dimethylthiotoluenediamine, MCDEA, 740M, E-100 or P1000.
The polyoxypropylene ether polyol has a number average molecular weight of 1000-6000 and a functionality of 2 or 3.
The catalyst is a tin catalyst or a composite catalyst, preferably an environment-friendly composite catalyst GF-02.
The anti-aging agent is one or more of 1076, 770, 292 or UV-1.
The polytetrahydrofuran ether polyol has a number average molecular weight of 650-2000, preferably polyols such as PTMG650, PTMG1000 and PTMG 2000.
The vegetable oil polyol is one or more of castor oil, HM-10200 or HM-10100.
The diisocyanate is one or more of 4,4 '-diphenylmethane diisocyanate (MDI-100), modified liquefied 4,4' -diphenylmethane diisocyanate (liquefied MDI), 4 dicyclohexylmethane diisocyanate (HMDI), isophorone diisocyanate (IPDI) or Toluene Diisocyanate (TDI), preferably HMDI.
The preparation method of the polyurethane pouring sealant for the submarine cable pouring comprises the following steps:
(1) Preparation of component A: mixing an amine chain extender, a polyoxypropylene ether polyol, a catalyst and an anti-aging agent, and dehydrating under vacuum at the temperature of 100-110 ℃ and under the pressure of-0.095 MPa until the moisture content is less than 0.05% to obtain a component A;
(2) Preparation of the component B: mixing polytetrahydrofuran ether polyol, vegetable oil polyol and diisocyanate, and reacting at 75-90 ℃ to obtain a prepolymer with isocyanate (NCO) content of 8-16.5% to obtain a component B;
(3) When in use, the components A and B are uniformly mixed according to the mass ratio of A: B =100 of 50-60, the mixing temperature is 25-35 ℃, the mixed viscosity is 800-1500cps, the operation time is 15-25 minutes, then the mixture is poured into a mould for vulcanization molding, the mould temperature is 25-35 ℃, the mould opening is carried out for 0.5-1 hour, and then the post-vulcanization is carried out for 5-10 days (preferably 7 days), so that the polyurethane pouring sealant product with Shore A hardness of 70-90 for submarine cable pouring and sealing is prepared.
Because the main chain of the conventional polyether polyol contains ether bonds (-R-O-R-), the terminal group or the side group contains more than or equal to 2 hydroxyl groups (-OH), the ether bonds and the hydroxyl groups are easy to react with water molecules in the air to form hydrogen bonds, the vegetable oil polyol usually contains longer hydrophobic fatty acid chain segments, the functionality is usually more than 2, and the reactivity of aliphatic and alicyclic diisocyanate is lower than that of aromatic, the stability of raw materials is improved by adding the vegetable oil polyol into a prepolymer, the water absorption swelling rate of a product is reduced, a reticular cross-linking structure is formed in the reaction process, and the mechanical property of a polyurethane product is enhanced; by introducing diisocyanate such as HMDI and the like, the operation time of the product is prolonged, the mechanical property is excellent, and the product is endowed with excellent hydrolysis resistance and chemical resistance.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the vegetable oil polyol is added into the component B, so that the stability of the raw materials is improved, a net-shaped cross-linked structure can be formed in the reaction process, the mechanical property of a polyurethane product is enhanced, and the water absorption swelling rate of the polyurethane product is reduced.
2. The invention adds diisocyanate such as HMDI and the like into the component B, thereby not only prolonging the operation time of the product and having excellent mechanical property, but also endowing the polyurethane product with excellent hydrolysis resistance and chemical resistance
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the practice of the invention. The percentages of the contents referred to in the raw materials of the examples and comparative examples are percentages by weight.
The materials used were as follows:
example 1
The preparation method of the polyurethane pouring sealant for the submarine cable pouring comprises the following steps:
preparation of the component A: 20% of MOCA; MN3050D 79.8%, GF-02 0.1% and 1076.1% are mixed and stirred uniformly, and dehydrated under the vacuum condition of 100-110 ℃ and under the pressure of-0.095 MPa until the moisture content is less than 0.05%, so as to obtain the component A.
Preparation of the component B: PTMG 2000%, BMY 19%, MDI-50-25% and HMDI 37% are reacted for 3 hours at the set reaction temperature of 80 ℃, and bubbles are removed in vacuum (-0.095 MPa), so that the prepolymer with isocyanate content of 16.5% is obtained.
Controlling the temperature of the component A and the component B at 30 ℃, uniformly mixing the component A and the component B according to the mass ratio of A/B =100/60, pouring the mixture into a mold for vulcanization molding, wherein the mixing temperature is 30 ℃, the mold temperature is 30 ℃ at room temperature, opening the mold within 0.5 hour, and post-vulcanizing at room temperature for 7 days to obtain the target product.
Example 2
The preparation method of the polyurethane pouring sealant for the submarine cable pouring comprises the following steps:
preparation of the component A: 20% of MOCA; MN3050D 79.8%, GF-02 0.1%, and 1076.1%, mixing and stirring, and vacuum dehydrating at 100-110 deg.C and-0.095 MPa to water content of less than 0.05% to obtain component A.
Preparation of the component B: PTMG 2000.9%, MDI-50.4% and HMDI 33.7% are reacted for 3 hours at the set reaction temperature of 80 ℃, and bubbles are removed under vacuum (-0.095 MPa) to obtain prepolymer with the content of isocyanate group of 16.5%.
Controlling the temperature of the component A and the component B at 30 ℃, uniformly mixing the component A and the component B according to the mass ratio of A/B =100/60, pouring the mixture into a mold for vulcanization molding, wherein the mixing temperature is 30 ℃, the mold temperature is 30 ℃ at room temperature, opening the mold within 0.5 hour, and post-vulcanizing at room temperature for 7 days to obtain the target product.
Example 3
The preparation method of the polyurethane pouring sealant for the submarine cable pouring comprises the following steps:
preparation of the component A: 20% of MOCA; MN3050D 79.8%, GF-02 0.1% and 1076.1% are mixed and stirred uniformly, and dehydrated under the vacuum condition of 100-110 ℃ and under the pressure of-0.095 MPa until the moisture content is less than 0.05%, so as to obtain the component A.
Preparation of the component B: PTMG 2000% and MDI-50% are reacted for 3 hours at the set reaction temperature of 80 ℃, and bubbles are removed in vacuum (-0.095 MPa), thus obtaining the prepolymer with the content of isocyanic acid radical of 16.5%.
Controlling the temperature of the component A and the component B at 30 ℃, uniformly mixing the component A and the component B according to the mass ratio of A/B =100/60, pouring the mixture into a mold for vulcanization molding, wherein the mixing temperature is 30 ℃, the mold temperature is 30 ℃ at room temperature, the mold opening is carried out for 0.5 hour, and the target product is obtained by post-vulcanization for 7 days at room temperature.
Example 4
The preparation method of the polyurethane pouring sealant for submarine cable pouring comprises the following steps:
preparation of component A: 20% of MOCA; MN3050D 79.8%, GF-02 0.1%, and 1076.1%, mixing and stirring, and vacuum dehydrating at 100-110 deg.C and-0.095 MPa to water content of less than 0.05% to obtain component A.
Preparation of the component B: PTMG 2000% 20%, BMY 20% and MDI-50% 60%, setting reaction temperature 80 deg.C to react for 3 hours, removing bubbles under vacuum (-0.095 MPa) to obtain prepolymer with 16.5% isocyanic acid radical content.
Controlling the temperature of the component A and the component B at 30 ℃, uniformly mixing the component A and the component B according to the mass ratio of A/B =100/60, pouring the mixture into a mold for vulcanization molding, wherein the mixing temperature is 30 ℃, the mold temperature is 30 ℃ at room temperature, opening the mold within 0.5 hour, and post-vulcanizing at room temperature for 7 days to obtain the target product.
Comparative example 1
The preparation method of the polyurethane pouring sealant for the submarine cable pouring comprises the following steps:
preparation of the component A: 20% of MOCA; mixing DL 2000.8 wt%, GF-02 0.1 wt% and 1076.1 wt%, and vacuum dewatering at 100-110 deg.c and below-0.095 MPa to water content less than 0.05 wt% to obtain component A.
Preparation of the component B: PTMG 2000%, BMY 19%, MDI-50-25% and HMDI 37% are reacted for 3 hours at the set reaction temperature of 80 ℃, and bubbles are removed in vacuum (-0.095 MPa), so that the prepolymer with isocyanate content of 16.5% is obtained.
Controlling the temperature of the component A and the component B at 30 ℃, uniformly mixing the component A and the component B according to the mass ratio of A/B =100/60, pouring the mixture into a mold for vulcanization molding, wherein the mixing temperature is 30 ℃, the mold temperature is 30 ℃ at room temperature, the mold opening is carried out for 0.5 hour, and the target product is obtained by post-vulcanization for 7 days at room temperature.
Comparative example 2
The preparation method of the polyurethane pouring sealant for submarine cable pouring comprises the following steps:
preparation of the component A: e, mixing the solution with the solution for 20 percent; DL 2000.8%, GF-02 0.1% and 1076.1% through mixing and vacuum dewatering at 100-110 deg.c and-0.095 MPa to water content less than 0.05% to obtain component A.
Preparation of the component B: PTMG 2000%, BMY 19%, MDI-50-25% and HMDI 37% are reacted for 3 hours at the set reaction temperature of 80 ℃, and bubbles are removed in vacuum (-0.095 MPa), so that the prepolymer with isocyanate content of 16.5% is obtained.
Controlling the temperature of the component A and the component B at 30 ℃, uniformly mixing the component A and the component B according to the mass ratio of A/B =100/60, pouring the mixture into a mold for vulcanization molding, wherein the mixing temperature is 30 ℃, the mold temperature is 30 ℃ at room temperature, the mold opening is carried out for 0.5 hour, and the target product is obtained by post-vulcanization for 7 days at room temperature.
The polyurethane articles prepared in examples 1 to 4 and comparative examples 1 and 2 were subjected to the performance test, and the results are shown in Table 1.
TABLE 1 comparison of mechanical properties of the articles of examples 1-4 and comparative examples 1,2
The polyurethane articles prepared in examples 1 to 4 and comparative examples 1 and 2 were subjected to a wet heat resistance test, and the results are shown in Table 2.
TABLE 2 comparison of the results of the double 85 test of examples 1-4 and comparative examples 1,2
The polyurethane articles prepared in examples 1 to 4 and comparative examples 1 and 2 were subjected to a heat aging test, and the results are shown in Table 3.
TABLE 3 comparison of the results of the thermal aging test of examples 1-4 and comparative examples 1,2
The polyurethane articles prepared in examples 1-4 and comparative examples 1,2 were subjected to the salt spray resistance test, and the results are shown in Table 4.
TABLE 4 comparison of results of the salt spray resistance test of examples 1 to 4 and comparative examples 1 and 2
The polyurethane articles prepared in examples 1 to 4 and comparative examples 1 and 2 were subjected to low temperature tests, and the results are shown in Table 5.
TABLE 5 comparison of the results of the Low temperature test of examples 1 to 4 and comparative examples 1,2
The polyurethane articles prepared in examples 1 to 4 and comparative examples 1 and 2 were subjected to density, water absorption and shrinkage tests, and the results are shown in Table 6.
TABLE 6 comparison of Density, water absorption, shrinkage test results for examples 1-4 and comparative examples 1,2
The polyurethane articles prepared in examples 1 to 4 and comparative examples 1,2 were subjected to the elastomer mix specific test method: the results of the ozone resistance test, the thermal elongation test, and the mineral oil immersion test are shown in Table 7.
TABLE 7 comparison of the results of the ozone resistance test, the thermal elongation test, and the mineral oil immersion test of examples 1 to 4 and comparative examples 1 and 2
Of course, the foregoing is only a preferred embodiment of the invention and should not be taken as limiting the scope of the embodiments of the invention. The present invention is not limited to the above examples, and equivalent changes and modifications made by those skilled in the art within the spirit and scope of the present invention should be construed as being included in the scope of the present invention.
Claims (7)
1. The utility model provides a submarine cable is polyurethane casting glue for embedment which characterized in that: the paint comprises a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight:
the component B comprises the following raw materials in percentage by weight:
the vegetable oil polyol is one or more of castor oil, HM-10200 or HM-10100;
the diisocyanate is one or more of 4,4' -diphenylmethane diisocyanate, modified liquefied 4,4' -diphenylmethane diisocyanate, 4' -dicyclohexylmethane diisocyanate, isophorone diisocyanate or toluene diisocyanate.
2. The polyurethane pouring sealant for the submarine cable pouring of claim 1, wherein: the amine chain extender is one or more than one of 3,3 '-dichloro-4, 4' -diaminodiphenylmethane, 3, 5-dimethylthiotoluenediamine, MCDEA, 740M, E-100 or P1000.
3. The polyurethane pouring sealant for the submarine cable pouring of claim 1, wherein: the polyoxypropylene ether polyol has a number average molecular weight of 1000-6000 and a functionality of 2 or 3.
4. The polyurethane pouring sealant for the submarine cable pouring of claim 1, wherein: the catalyst is tin catalyst or composite catalyst.
5. The polyurethane pouring sealant for the submarine cable pouring of claim 1, wherein: the anti-aging agent is one or more of 1076, 770, 292 or UV-1.
6. The preparation method of the polyurethane pouring sealant for submarine cable pouring of any one of claims 1-5, which is characterized by comprising the following steps: the method comprises the following steps:
(1) Preparation of component A: mixing an amine chain extender, a polyoxypropylene ether polyol, a catalyst and an anti-aging agent, and dehydrating under vacuum at the temperature of 100-110 ℃ and under the pressure of-0.095 MPa until the moisture content is less than 0.05% to obtain a component A;
(2) Preparation of the component B: mixing polytetrahydrofuran ether polyol, vegetable oil polyol and diisocyanate, and reacting at 75-90 ℃ to obtain a prepolymer with the isocyanate content of 8-16.5% to obtain a component B;
(3) When in use, the components A and B are uniformly mixed according to the mass ratio of A: B =100 of 50-60, then poured into a mold for vulcanization molding, and then post-vulcanized to prepare the polyurethane pouring sealant product for submarine cable potting.
7. The preparation method of the polyurethane pouring sealant for submarine cable pouring according to claim 6, wherein the preparation method comprises the following steps: in the step (3), the mixing temperature is 25-35 ℃, the operable time is 15-25 minutes, the mold temperature is 25-35 ℃, the mold opening is carried out for 0.5-1 hour, and the post-vulcanization time is 5-10 days.
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| CN111518253B (en) * | 2020-04-10 | 2022-01-25 | 李春梅 | Underwater cable solid filling material, preparation method and application |
| CN113717371B (en) * | 2021-08-30 | 2023-11-10 | 山东一诺威新材料有限公司 | Preparation method of low-viscosity reactive flame-retardant polyether polyol, reactive flame-retardant heat-conducting polyurethane electronic pouring sealant and preparation method thereof |
| CN115612438B (en) * | 2022-12-19 | 2023-05-09 | 山东一诺威聚氨酯股份有限公司 | Heat-conducting polyurethane structural adhesive with improved high-temperature retention rate and preparation method thereof |
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| CN107286895A (en) * | 2017-06-29 | 2017-10-24 | 上海应用技术大学 | A kind of transparent environmental protection flame retardant type polyurethane cable connector casting glue and preparation method thereof |
| CN110272709B (en) * | 2019-06-13 | 2021-08-03 | 南京威邦新材料有限公司 | Transparent yellowing-resistant polyurethane pouring sealant and preparation method thereof |
| CN110372844B (en) * | 2019-06-18 | 2021-09-21 | 中路高科(北京)公路技术有限公司 | Polyurethane grouting material, preparation method and application |
| CN111849410A (en) * | 2020-06-23 | 2020-10-30 | 山东一诺威聚氨酯股份有限公司 | Halogen-free flame-retardant heat-conducting polyurethane pouring sealant and preparation method thereof |
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