CN109181620B - Room-temperature curing weather-resistant polyurethane adhesive with long bonding time - Google Patents
Room-temperature curing weather-resistant polyurethane adhesive with long bonding time Download PDFInfo
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- CN109181620B CN109181620B CN201810991304.7A CN201810991304A CN109181620B CN 109181620 B CN109181620 B CN 109181620B CN 201810991304 A CN201810991304 A CN 201810991304A CN 109181620 B CN109181620 B CN 109181620B
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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
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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
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- 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
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2272—Ferric oxide (Fe2O3)
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a room-temperature curing weather-resistant polyurethane adhesive with long bonding time, which consists of a main agent component A and a curing agent component B, and comprises the following components in parts by mass: the main agent A comprises 40.5-50 parts of castor oil, 6.8-8.4 parts of hydroxyethylated bisphenol A, 15-30 parts of talcum powder, 3-4.5 parts of iron oxide red, 12.9-28.3 parts of solvent, 2.6-4.5 parts of coupling agent and 0.1-0.3 part of catalyst; the curing agent B component comprises 32.3 parts of polymethylene polyphenyl polyisocyanate (PAPI) and 17.7 parts of solvent; 2/1. The product is applied to the bonding of a steel base material and a polyurethane casting material, and overcomes the defects that the adhesive in the prior art fails to work after being coated on the base material after being placed in an atmospheric environment for a long time, the bonding strength is reduced, the weather resistance is poor, and the requirement of the engineering field on high bonding strength cannot be met.
Description
Technical Field
The invention relates to a room-temperature curing double-component polyurethane adhesive, belongs to the technical field of chemical adhesives, and particularly relates to an adhesive suitable for room-temperature bonding of a steel base material and a polyurethane casting material.
Background
The two-component polyurethane adhesive is generally composed of a component A and a component B, and is prepared according to a certain proportion before use. The component A (main agent) is a component containing active hydrogen, and the component B (curing agent) is a polyurethane prepolymer component containing-NCO groups. The double-component polyurethane adhesive belongs to a reaction type adhesive, and the two components are mixed to generate a crosslinking reaction and quickly form a strong bonding layer. The double-component polyurethane adhesive has the advantages of adjustable performance, high adhesive strength and wide adhesive range, can be cured at room temperature, can be added with a proper catalyst or cured by heating, and has higher final adhesive strength than the single-component adhesive, so that the double-component polyurethane adhesive is a product with the largest variety and the largest output in the polyurethane adhesive.
The castor oil is long fatty acid molecular chain, and is usually used for preparing the adhesive with polyisocyanate, and the prepared adhesive has good flexibility and good hydrolytic stability. However, the adhesive bonding substrate surface reported by Li Houtang et al (Li Houtang, fan Li., development and application of novel two-component polyurethane adhesive [ J ]. Chinese adhesive, 2005, 14: 35-36.) is not suitable for engineering construction application because of the need of sand blasting treatment. In recent years, with the development of industries such as mining industry, transportation and the like, the requirements on the performance of the adhesive are higher and higher. Engineering construction in the field of rail transit is mostly carried out outdoors, and the adhesive is required to have good operation manufacturability and be capable of being cured at room temperature, and is required to have high bonding strength under the condition that the base material is not subjected to other physical and chemical treatments except grinding wheel polishing. In addition, in the application occasion of bonding the base material and the polyurethane casting material, after the adhesive is coated on the base material, the surface of the adhesive is required to be exposed in the atmospheric environment for a long time and then the material casting is carried out, and the adhesive still shows good bonding strength.
For convenience of description, the time from the time when the adhesive is coated on the substrate to the time when the polyurethane material is poured is defined as the bonding time; the adhesive is coated on a base material to be bonded with a polyurethane casting material, the base material is placed at room temperature for 72 hours to be subjected to bonding test, the bonding time which meets the requirement that the tensile bonding strength is more than or equal to 2MPa is defined as the bondable time, and the longer the bondable time is, the larger the process tolerance of the adhesive is.
The adhesive which is sold in the market at present and is applied to bonding of steel base materials and polyurethane casting materials is quickly invalidated after being placed in an atmospheric environment after being coated on the base materials, the bonding strength is quickly reduced, the bonding time is less than 72h (the tensile bonding strength is less than 2MPa), and the requirements of the engineering field on the bonding strength and the process tolerance cannot be met.
Disclosure of Invention
The invention aims to solve the technical problem of providing a room-temperature curing weather-resistant polyurethane adhesive with long bonding time, which is coated on a base material, can still keep good bonding property with a polyurethane casting material after being exposed in air for a long time, and has excellent hot air aging resistance and salt water aging resistance.
In order to solve the technical problems, the technical scheme of the invention is as follows: a room temperature curing weather-resistant polyurethane adhesive capable of being bonded for a long time consists of a main agent component A and a curing agent component B, and comprises the following components in parts by mass:
(1) the main agent A component
(2) Curing agent B component
Polymethylene polyphenyl polyisocyanates (PAPI)32.3
Solvent 17.7
A/B＝2/1。
The hydroxyl value of the hydroxyethylated bisphenol A is generally 220 to 348 mgKOH/g.
Suitable coupling agents are, for example, 3-aminopropyltriethoxysilane (KH550), gamma-glycidoxypropyltrimethoxysilane (KH560), 3-methacryloxypropyltrimethoxysilane (KH570), gamma-mercaptopropyltriethoxysilane (KH580), gamma-mercaptopropyltrimethoxysilane (KH590) or anilinomethyltriethoxysilane (ND-42).
Suitable solvents are, for example, ethyl acetate, butyl acetate, dichloromethane or acetone.
The catalyst suitable for use is one of the commonly used tin catalysts, amine catalysts and the like.
Other raw materials are all the varieties and specifications which are commonly used in the field.
The adhesive provided by the invention is suitable for bonding a polyurethane material and a steel material at room temperature, the bonding time of the adhesive can reach 72h, the bonding strength is still more than 2MPa after the adhesive is coated and placed in an atmospheric environment for 72h, the tolerance of the time for bonding after coating in engineering construction is longer, the bonding strength is high, the hot air aging resistance and the saline water aging resistance are good, the adaptability to the environment is strong, and the application requirements on engineering can be met.
The invention develops an adhesive used at room temperature and applied to bonding a steel base material and a polyurethane casting material, and overcomes the defects that the adhesive in the prior art fails to work after being painted on the base material and placed in an atmospheric environment for a long time, the bonding strength is reduced, the weather resistance is poor, and the requirement of the engineering field on high bonding strength cannot be met.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Weighing the raw materials according to the mass ratio, adding the raw materials into a reactor, and uniformly stirring to obtain A, B components respectively.
Uniformly mixing the adhesives according to the mass ratio of A/B-2/1, brushing the adhesives on a base material, pouring polyurethane materials into two base material cavities which are placed in parallel according to the size of GB/T13477.8-2002, after the adhesives are coated, respectively pouring the polyurethane materials into the two base material cavities which are placed in parallel at different times of 1h, 24h, 48h and 72h to prepare a tensile bonding sample, and after the sample is placed at room temperature for 72h, testing the tensile bonding strength according to the method of GB/T13477.8-2002.
The hot air aging resistant test specimens were: pouring the polyurethane material after 1h of gluing, standing at room temperature for 72h, then aging in hot air at 70 ℃ for 168h, and carrying out tensile bonding strength test.
The saline aging resistant test specimens were: pouring the polyurethane material 1h after gluing, standing at room temperature for 72h, then aging in 4% NaCl saline at 40 ℃ for 168h, and carrying out tensile bonding strength test.
The test results are shown in table 1.
Example 1
The component A comprises the following raw materials: 42g of castor oil, 7g of hydroxyethylated bisphenol A (hydroxyl value 348), 30g of talc, 3g of iron oxide red, 2.6g of KH550, 15.3g of a mixed solvent of ethyl acetate and butyl acetate in a ratio of 1: 1, and 0.1g of stannous octoate catalyst.
The component B comprises the following raw materials: PAPI 64.6g, 35.4g ethyl acetate solvent.
Example 2
The component A comprises the following raw materials: 40.5g of castor oil, 6.8g of hydroxyethylated bisphenol A (hydroxyl value 324), 15g of talc, 4.5g of iron oxide red, 4.5g of KH550, 28.3g of a mixed solvent of ethyl acetate and dichloromethane in a ratio of 1: 1, and 0.3g of a 33% triethylene diamine catalyst.
The component B comprises the following raw materials: PM20064.6 g, 35.4g ethyl acetate and butyl acetate 1: 1 mixed solvent.
Example 3
The component A comprises the following raw materials: 50g of castor oil, 8.4g of hydroxyethylated bisphenol A (hydroxyl number 220), 22.5g of talc, 3.75g of iron oxide red, 2.25g of KH550, 12.9g of a mixed solvent of ethyl acetate and butyl acetate in a ratio of 1: 1, and 0.2g of a 33% triethylenediamine catalyst.
The component B comprises the following raw materials: PM20064.6 g, 35.4g ethyl acetate and butyl acetate 1: 1 mixed solvent.
Comparative example
The adhesive is prepared by bonding a commercially available steel base material and a polyurethane casting material.
TABLE 1 tensile bond Strength testing under different experimental conditions
Claims (5)
1. A room temperature curing weather-resistant polyurethane adhesive capable of being bonded for a long time consists of a main agent component A and a curing agent component B, and comprises the following components in parts by mass:
(1) the main agent A component
(2) Curing agent B component
Polymethylene polyphenyl polyisocyanates (PAPI)32.3
Solvent 17.7
A/B＝2/1。
2. The room-temperature curing weather-resistant polyurethane adhesive capable of being bonded for a long time according to claim 1, wherein the hydroxyl value of the hydroxyethylated bisphenol A is 220-348 mgKOH/g.
3. The room temperature curable weatherable polyurethane adhesive according to claim 1, wherein the coupling agent is 3-aminopropyltriethoxysilane (KH550), gamma-glycidoxypropyltrimethoxysilane (KH560), 3-methacryloxypropyltrimethoxysilane (KH570), gamma-mercaptopropyltriethoxysilane, gamma-mercaptopropyltrimethoxysilane, or aniline methyltriethoxysilane (ND-42).
4. The room-temperature curing weather-resistant polyurethane adhesive capable of being bonded for a long time according to claim 1, wherein the solvent is ethyl acetate, butyl acetate, dichloromethane or acetone.
5. The room-temperature-curable weather-resistant polyurethane adhesive capable of being bonded for a long time according to claim 1, wherein the catalyst is a tin catalyst or an amine catalyst.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810991304.7A CN109181620B (en) | 2018-08-22 | 2018-08-22 | Room-temperature curing weather-resistant polyurethane adhesive with long bonding time |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810991304.7A CN109181620B (en) | 2018-08-22 | 2018-08-22 | Room-temperature curing weather-resistant polyurethane adhesive with long bonding time |
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| Publication Number | Publication Date |
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| CN109181620A CN109181620A (en) | 2019-01-11 |
| CN109181620B true CN109181620B (en) | 2021-07-02 |
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| CN201810991304.7A Active CN109181620B (en) | 2018-08-22 | 2018-08-22 | Room-temperature curing weather-resistant polyurethane adhesive with long bonding time |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111057513B (en) * | 2019-11-29 | 2022-08-30 | 黎明化工研究设计院有限责任公司 | High-low temperature universal bi-component polyurethane adhesive |
| CN111303820B (en) * | 2020-03-09 | 2021-03-26 | 杭州之江新材料有限公司 | Double-component polyurethane structural adhesive for bonding power battery and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314267A (en) * | 2007-06-01 | 2008-12-03 | Sika技术股份公司 | Honeycomb sandwich panels and the use of a two component polyurethane adhesive in the manufacture thereof |
| CN102559126A (en) * | 2012-01-05 | 2012-07-11 | 北京天山新材料技术股份有限公司 | Hydrolysis-resistant double-component polyurethane adhesive for structure adhesion |
| CN103509515A (en) * | 2012-06-27 | 2014-01-15 | 上海杰事杰新材料(集团)股份有限公司 | Polyurethane adhesive and preparation method thereof |
| CN107001571A (en) * | 2014-11-14 | 2017-08-01 | 3M创新有限公司 | Two part polyurethane adhesive compositions |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5604407B2 (en) * | 2010-12-21 | 2014-10-08 | ローム アンド ハース カンパニー | Adhesive composition |
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- 2018-08-22 CN CN201810991304.7A patent/CN109181620B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101314267A (en) * | 2007-06-01 | 2008-12-03 | Sika技术股份公司 | Honeycomb sandwich panels and the use of a two component polyurethane adhesive in the manufacture thereof |
| CN102559126A (en) * | 2012-01-05 | 2012-07-11 | 北京天山新材料技术股份有限公司 | Hydrolysis-resistant double-component polyurethane adhesive for structure adhesion |
| CN103509515A (en) * | 2012-06-27 | 2014-01-15 | 上海杰事杰新材料(集团)股份有限公司 | Polyurethane adhesive and preparation method thereof |
| CN107001571A (en) * | 2014-11-14 | 2017-08-01 | 3M创新有限公司 | Two part polyurethane adhesive compositions |
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