CN112552855A - Polyurethane pouring sealant and preparation method and application thereof - Google Patents

Polyurethane pouring sealant and preparation method and application thereof Download PDF

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Publication number
CN112552855A
CN112552855A CN202011340121.2A CN202011340121A CN112552855A CN 112552855 A CN112552855 A CN 112552855A CN 202011340121 A CN202011340121 A CN 202011340121A CN 112552855 A CN112552855 A CN 112552855A
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China
Prior art keywords
component
pouring sealant
polyurethane pouring
polyurethane
parts
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CN202011340121.2A
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Chinese (zh)
Inventor
周敏
熊二青
金燕
赵勇刚
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Shagnhai Huitian New Chemical Materials Co ltd
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Shagnhai Huitian New Chemical Materials Co ltd
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Priority to CN202011340121.2A priority Critical patent/CN112552855A/en
Publication of CN112552855A publication Critical patent/CN112552855A/en
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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
    • 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
    • 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
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • 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
    • C08K3/28—Nitrogen-containing compounds
    • C08K2003/282—Binary compounds of nitrogen with aluminium
    • 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
    • C08K3/32—Phosphorus-containing compounds
    • C08K2003/321—Phosphates
    • C08K2003/322—Ammonium phosphate
    • C08K2003/323—Ammonium polyphosphate

Abstract

The invention discloses a polyurethane pouring sealant and a preparation method and application thereof, wherein the polyurethane pouring sealant is prepared by mixing a component A and a component B according to the mass ratio of 100:20-50, wherein the component A comprises modified vegetable oil polyol, a flame retardant, a heat conducting agent, a water removing agent, color paste, a defoaming agent and a catalyst; the component B comprises isocyanate and a plasticizer. The polyurethane pouring sealant disclosed by the invention is moderate in mixed viscosity, easy to operate, adjustable in curing speed, excellent in mechanical property, flame retardant property, heat conduction property and electrical property, particularly excellent in adhesion property to metal, excellent in aging resistance and corrosion resistance, and capable of being widely applied to filling and sealing and protecting effects in various fields. The polyurethane pouring sealant has simple preparation process and is suitable for industrial production. The polyurethane pouring sealant is convenient to use and easy to realize pouring.

Description

Polyurethane pouring sealant and preparation method and application thereof
Technical Field
The invention relates to the technical field of polyurethane, in particular to a polyurethane pouring sealant and a preparation method and application thereof.
Background
The pouring sealant can be mainly classified into epoxy pouring sealant, polyurethane pouring sealant and organic silicon pouring sealant. The epoxy pouring sealant has the characteristics of poor toughness, easiness in cracking, no cold and thermal shock resistance, low hardness, low bonding strength and higher cost, and the polyurethane pouring sealant has the characteristics of adjustable hardness, moderate bonding strength, high elasticity, high shock resistance, high wear resistance, excellent low temperature resistance and the like. Compared with epoxy pouring sealant and organic silicon pouring sealant, the polyurethane pouring sealant is suitable for pouring in more fields.
With the continuous development of the science and technology level, higher requirements are put forward on the comprehensive performance of the polyurethane pouring sealant. More and more application fields require that the polyurethane pouring sealant has good adhesion to a base material, especially a metal base material, and has good aging resistance and corrosion resistance, such as high temperature and high humidity resistance, high temperature resistance, high and low temperature impact resistance, cooling liquid corrosion resistance and the like.
However, most of domestic researches on polyurethane pouring sealants concentrate on improving heat-conducting property, flame retardant property and the like, and researches on how to improve the adhesion of the polyurethane pouring sealant to a base material, particularly a metal base material and realize excellent aging resistance and corrosion resistance are rarely reported.
Disclosure of Invention
The invention aims to provide a polyurethane pouring sealant and a preparation method and application thereof, aiming at the defects in the prior art, so that the excellent adhesion to a metal substrate is realized, and the excellent aging resistance and corrosion resistance are displayed.
In order to achieve the purpose, the invention adopts the technical scheme that:
the first aspect of the invention provides a polyurethane pouring sealant, which is prepared by mixing a component A and a component B in a mass ratio of 100: 20-50;
the component A is prepared from the following components in parts by weight: 20-50 parts of modified vegetable oil polyalcohol, 20-40 parts of flame retardant, 20-40 parts of heat conducting agent, 0.5-5 parts of water removing agent, 0.1-3 parts of color paste, 0.05-0.5 part of defoaming agent and 0.001-0.01 part of catalyst;
the component B is prepared from the following components in parts by weight: 50-100 parts of isocyanate and 20-40 parts of plasticizer.
Preferably, the modified vegetable oil polyol in the component A is one or more of modified vegetable oil polyols with hydroxyl value of 100-500mg KOH/g and functionality of 2-5. Preferably a modified vegetable oil polyol provided in Vateluos or Ito oil or basf or Shanghaineri oil.
Preferably, the isocyanate in the component B is one or more of isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), carbodiimide modified MDI, 1, 6-Hexamethylene Diisocyanate (HDI) and polymethylene polyphenyl polyisocyanate (PAPI).
Preferably, the flame retardant in the component A is one or more of ammonium polyphosphate, melamine and aluminum hydroxide; or the flame retardant in the component A is one or more of hypophosphite and phosphate flame retardants
Preferably, the heat conducting agent in the component A is one or more of aluminum oxide, zinc oxide, aluminum nitride and boron nitride.
Preferably, the water removing agent in the component A is activated molecular sieve powder.
Preferably, the color paste in the component A is carbon black treated by polyether or plasticizer.
Preferably, the defoaming agent in the A component is a silicone defoaming agent.
Preferably, the catalyst in the A component is an organic tin catalyst or an organic bismuth catalyst.
Preferably, the plasticizer is one or more of phthalic diester, adipic diester, sebacic diester and phosphate.
The second aspect of the invention provides a preparation method of the polyurethane pouring sealant, which comprises the following steps:
uniformly mixing the modified vegetable oil polyalcohol, the flame retardant, the heat conducting agent and the color paste, dehydrating for 2-3 hours under the vacuum condition of 120-130 ℃, cooling to 50-60 ℃, adding the catalyst, the defoaming agent and the water removing agent, uniformly mixing, sealing and packaging to obtain a component A; uniformly mixing the isocyanate and the plasticizer, and sealing and packaging to obtain a component B; and uniformly mixing the component A and the component B according to the mass ratio of 100:20-50, and encapsulating for use.
It is worth noting that when the curing agent is cured at normal temperature, the curing time is 12-24 hours; when the curing is carried out at the temperature of 60-80 ℃, the curing time is 0.5-2 hours.
The third aspect of the invention provides application of the polyurethane pouring sealant in various electronic components and new energy automobile power batteries.
By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:
1. the polyurethane pouring sealant provided by the invention has moderate mixing viscosity, is easy to operate, has adjustable curing speed, and has excellent mechanical property, flame retardant property, heat conduction property and electrical property. The concrete expression is as follows: the tensile shear strength to the aluminum substrate after the curing is completely 5-15 Mpa; the aluminum base material is aged for 1000 hours at high temperature and high humidity of 85 ℃ or 1000 hours at high temperature of 125 ℃, or aged for 1000 times by high-low temperature impact-40-125 ℃ or soaked in cooling liquid for 24 hours, the tensile shear strength of the aluminum base material is not obviously reduced, the retention rate reaches more than 80 percent, and the rubber blocks under the same aging condition have no cracking phenomenon after aging.
2. The polyurethane pouring sealant disclosed by the invention is excellent in performance, convenient to use and widely applicable to pouring and protecting various electronic components, new energy automobile power batteries and other fields.
3. The preparation method disclosed by the invention is simple in process, low in cost, strong in operability, environment-friendly and suitable for industrial production.
Detailed Description
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
Example 1
In this example, a polyurethane potting adhesive was prepared according to the ratio of table 1:
TABLE 1
Figure BDA0002798376280000031
Figure BDA0002798376280000041
Example 2
In this example, a polyurethane potting adhesive was prepared according to the ratio of table 2:
TABLE 2
Figure BDA0002798376280000042
Figure BDA0002798376280000051
Example 3
In this example, a polyurethane potting adhesive was prepared according to the ratio of table 3:
TABLE 3
Figure BDA0002798376280000052
Figure BDA0002798376280000061
Example 4
In this example, a polyurethane potting adhesive was prepared according to the ratio of table 4:
TABLE 4
Figure BDA0002798376280000062
Figure BDA0002798376280000071
Example 5
In this example, a polyurethane potting adhesive was prepared according to the ratio of table 5:
TABLE 5
Figure BDA0002798376280000072
Figure BDA0002798376280000081
Example 6
In this example, a polyurethane potting adhesive was prepared according to the ratio of table 6:
TABLE 6
Figure BDA0002798376280000082
Comparative example 1
In this comparative example, a polyurethane potting adhesive was prepared according to the ratio of table 7:
TABLE 7
Figure BDA0002798376280000091
Comparative example 2
In this comparative example, a polyurethane potting adhesive was prepared according to the ratio of table 8:
TABLE 8
Figure BDA0002798376280000101
Application example
The polyurethane potting adhesives prepared in examples 1 to 6 and comparative examples 1 to 2 were subjected to a performance test. The results are shown in Table 9:
TABLE 9
Figure BDA0002798376280000102
Figure BDA0002798376280000111
As can be seen from the data in Table 9, the polyurethane potting adhesive prepared in examples 1-6 has moderate mixing viscosity, easy operation, adjustable curing speed, and excellent mechanical properties, flame retardant properties, heat conductivity, and electrical properties, and compared with comparative examples 1-2, the adhesive property to metal aluminum is greatly improved, and excellent aging resistance and corrosion resistance are exhibited.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims (12)

1. The polyurethane pouring sealant is characterized by being prepared by mixing a component A and a component B according to the mass ratio of 100: 20-50;
the component A is prepared from the following components in parts by weight: 20-50 parts of modified vegetable oil polyalcohol, 20-40 parts of flame retardant, 20-40 parts of heat conducting agent, 0.5-5 parts of water removing agent, 0.1-3 parts of color paste, 0.05-0.5 part of defoaming agent and 0.001-0.01 part of catalyst;
the component B is prepared from the following components in parts by weight: 50-100 parts of isocyanate and 20-40 parts of plasticizer.
2. The polyurethane pouring sealant as claimed in claim 1, wherein the modified vegetable oil polyol in the component A is one or more of modified vegetable oil polyols with hydroxyl value of 100-500mg KOH/g and functionality of 2-5.
3. The polyurethane pouring sealant according to claim 1, wherein the isocyanate in the component B is one or more of isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), carbodiimide-modified MDI, 1, 6-Hexamethylene Diisocyanate (HDI), and polymethylene polyphenyl polyisocyanate (PAPI).
4. The polyurethane pouring sealant as claimed in claim 1, wherein the flame retardant in the component A is one or more of ammonium polyphosphate, melamine and aluminum hydroxide; or the flame retardant in the component A is one or more of hypophosphite and phosphate flame retardants.
5. The polyurethane pouring sealant as claimed in claim 1, wherein the heat conducting agent in the component A is one or more of aluminum oxide, zinc oxide, aluminum nitride and boron nitride.
6. The polyurethane potting adhesive of claim 1, wherein the water scavenger in the a component is activated molecular sieve powder.
7. The polyurethane pouring sealant as claimed in claim 1, wherein the color paste in the component A is carbon black treated with polyether or plasticizer.
8. The polyurethane pouring sealant as claimed in claim 1, wherein the defoamer in the component A is a silicone defoamer.
9. The polyurethane pouring sealant as claimed in claim 1, wherein the catalyst in the component A is an organic tin catalyst or an organic bismuth catalyst.
10. The polyurethane pouring sealant as claimed in claim 1 or 7, wherein the plasticizer is one or more of phthalic diester, adipic diester, sebacic diester, and phosphate.
11. The method for preparing the polyurethane pouring sealant as claimed in any one of claims 1 to 10, comprising the steps of:
uniformly mixing the modified vegetable oil polyalcohol, the flame retardant, the heat conducting agent and the color paste, dehydrating for 2-3 hours under the vacuum condition of 120-130 ℃, cooling to 50-60 ℃, adding the catalyst, the defoaming agent and the water removing agent, uniformly mixing, sealing and packaging to obtain a component A; uniformly mixing the isocyanate and the plasticizer, and sealing and packaging to obtain a component B; and uniformly mixing the component A and the component B according to the mass ratio of 100:20-50, and encapsulating for use.
12. The use of the polyurethane potting adhesive of any of claims 1 to 10 in various electronic components and new energy automobile power batteries.
CN202011340121.2A 2020-11-25 2020-11-25 Polyurethane pouring sealant and preparation method and application thereof Pending CN112552855A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114410268A (en) * 2021-12-31 2022-04-29 深圳市安品有机硅材料有限公司 Magnetic conductive polyurethane pouring sealant and preparation method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104736584A (en) * 2012-09-14 2015-06-24 Sika技术股份公司 Two-component polyurethane compositions, in particular suitable for use as viscoplastic structural adhesives or as casting compounds
CN109468113A (en) * 2017-09-08 2019-03-15 烟台德邦科技有限公司 A kind of casting glue for wind-driven generator coating protection
CN110283564A (en) * 2019-07-24 2019-09-27 张家港市飞航科技有限公司 A kind of bi-component polyurethane adhesive and its preparation method and application
CN111019587A (en) * 2019-12-17 2020-04-17 格丽泰新材料科技（苏州）有限公司 Two-component polyurethane adhesive for bonding power battery and preparation method thereof
CN111019589A (en) * 2019-12-11 2020-04-17 格丽泰新材料科技（苏州）有限公司 Two-component polyurethane adhesive, preparation method thereof and application thereof in soft package battery
CN111303820A (en) * 2020-03-09 2020-06-19 杭州之江新材料有限公司 Double-component polyurethane structural adhesive for bonding power battery and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104736584A (en) * 2012-09-14 2015-06-24 Sika技术股份公司 Two-component polyurethane compositions, in particular suitable for use as viscoplastic structural adhesives or as casting compounds
CN109468113A (en) * 2017-09-08 2019-03-15 烟台德邦科技有限公司 A kind of casting glue for wind-driven generator coating protection
CN110283564A (en) * 2019-07-24 2019-09-27 张家港市飞航科技有限公司 A kind of bi-component polyurethane adhesive and its preparation method and application
CN111019589A (en) * 2019-12-11 2020-04-17 格丽泰新材料科技（苏州）有限公司 Two-component polyurethane adhesive, preparation method thereof and application thereof in soft package battery
CN111019587A (en) * 2019-12-17 2020-04-17 格丽泰新材料科技（苏州）有限公司 Two-component polyurethane adhesive for bonding power battery and preparation method thereof
CN111303820A (en) * 2020-03-09 2020-06-19 杭州之江新材料有限公司 Double-component polyurethane structural adhesive for bonding power battery and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114410268A (en) * 2021-12-31 2022-04-29 深圳市安品有机硅材料有限公司 Magnetic conductive polyurethane pouring sealant and preparation method thereof
CN114410268B (en) * 2021-12-31 2024-03-12 深圳市安品有机硅材料有限公司 Magnetic permeability polyurethane pouring sealant and preparation method thereof

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