CN111286295B - Adhesive with controllable attenuation of bonding strength and preparation method thereof - Google Patents
Adhesive with controllable attenuation of bonding strength and preparation method thereof Download PDFInfo
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- CN111286295B CN111286295B CN202010150022.1A CN202010150022A CN111286295B CN 111286295 B CN111286295 B CN 111286295B CN 202010150022 A CN202010150022 A CN 202010150022A CN 111286295 B CN111286295 B CN 111286295B
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- adhesive
- bonding strength
- parts
- controllable attenuation
- isocyanate prepolymer
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- 239000000853 adhesive Substances 0.000 title claims abstract description 69
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 69
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 66
- 239000012948 isocyanate Substances 0.000 claims abstract description 28
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 28
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 24
- 239000010703 silicon Substances 0.000 claims abstract description 24
- 229920005906 polyester polyol Polymers 0.000 claims abstract description 23
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 22
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 22
- 239000003054 catalyst Substances 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 4
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 2
- UAWGSKRIXWHJTP-UHFFFAOYSA-N dimethoxy-(oxiran-2-ylmethoxymethoxy)-propylsilane Chemical compound CCC[Si](OC)(OC)OCOCC1CO1 UAWGSKRIXWHJTP-UHFFFAOYSA-N 0.000 claims description 2
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000011259 mixed solution Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract 1
- 238000002156 mixing Methods 0.000 description 18
- 239000004744 fabric Substances 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 239000002994 raw material Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 4
- 230000002238 attenuated effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012612 commercial material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- 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
- C09J175/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0092—Temporary binders, mortars or concrete, i.e. materials intended to be destroyed or removed after hardening, e.g. by acid dissolution
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to an adhesive with controllable attenuation of bonding strength and a preparation method thereof, and aims to provide an adhesive with high initial bonding strength and rapid attenuation of later bonding strength under a certain condition and a preparation method thereof, which are characterized in that the adhesive comprises the following components in parts by mass based on 100 parts by mass of the material: 25-45 parts of polyester polyol, 3-5 parts of calcium hydroxide, 1-2 parts of sodium hydroxide, 40-60 parts of isocyanate prepolymer, 1-10 parts of organic silicon and 0.1-1.0 part of catalyst. The invention breaks through the difficult problems that the traditional adhesive has high bonding strength and can not controllably attenuate in the service process, and solves the technical bottlenecks that the curing material in railway engineering needs high bonding strength at the initial stage of film pasting and needs low bonding strength when the concrete is demoulded.
Description
Technical Field
The invention belongs to the technical field of adhesive materials, and particularly relates to an adhesive with controllable attenuation of bonding strength and a preparation method thereof.
Background
The early-stage reasonable maintenance is a key control link for ensuring the quality of concrete engineering and is very important for controlling cracks of concrete caused by drying shrinkage and temperature gradient. The concrete surface is covered with the curing material, so that the concrete can be cured, the risk of drying shrinkage cracking and temperature stress cracking of the concrete is reduced, and the durability of the concrete structure is improved. The curing material is attached to the template, and the curing material is left on the surface of the concrete when the concrete to be poured is cured and demoulded, so that the curing workload can be reduced, but the traditional adhesive has higher bonding strength, the strength can be improved along with the time, and the curing material can not be firmly adhered to the surface of the template and can not be left on the surface of the concrete along with the separation of the template and the concrete. At present, an adhesive with high initial bonding strength and rapidly attenuated later strength is not found, and the invention aims to provide an adhesive with controllable attenuation of bonding strength and a preparation method thereof.
Disclosure of Invention
The invention aims to solve the problems and provides an adhesive with controllable attenuation of bonding strength and a preparation method thereof.
The invention relates to an adhesive with controllable attenuation of bonding strength and a preparation method thereof, which are characterized in that the adhesive comprises the following components in parts by mass, calculated by 100 parts by mass of the material: 25-45 parts of polyester polyol, 3-5 parts of calcium hydroxide, 1-2 parts of sodium hydroxide, 40-60 parts of isocyanate prepolymer, 1-10 parts of organic silicon and 0.1-1.0 part of catalyst.
The polyester polyol is a commercial material, and the functionality of the polyester polyol is 2.0-3.5.
The particle size of the calcium hydroxide is 50-1000 nanometers.
The particle size of the sodium hydroxide is 10-200 microns.
The isocyanate prepolymer is a prepolymer of hexamethylene diisocyanate, and the content of isocyanate is 10-18%.
The organic silicon is one or more of vinyl trimethoxy silane, aminopropyl triethoxy silane and (glycidoxy) propyl trimethoxy silane.
The initial bonding strength of the adhesive is 1.2MPa, and the bonding strength of the adhesive is 0.05MPa after the adhesive meets water vapor for 6 hours.
The preparation method of the adhesive with controllable attenuation of bonding strength is characterized by comprising the following steps:
(1) Firstly, uniformly mixing all components except the isocyanate prepolymer and the organic silicon at normal temperature;
(2) and mixing the isocyanate prepolymer and organic silicon, and adding the mixture into the obtained mixed solution to obtain the adhesive with controllable attenuation of bonding strength.
Compared with the prior art, the adhesive with controllable attenuation of bonding strength and the preparation method thereof have the following beneficial effects:
1. the adhesive with controllable attenuation of the bonding strength overcomes the difficult problem that the bonding strength of the traditional adhesive is not attenuated or is slowly attenuated, the initial bonding strength of the adhesive is 1.2MPa, the bonding strength of the adhesive is 0.05MPa after the adhesive meets water for 6 hours, and the adhesive is suitable for the technical requirement of adhering curing materials on a template in concrete construction.
2. The adhesive with controllable attenuation of bonding strength can generate a micro-foamed open-cell material after meeting water, has a water absorption effect, can absorb water, improves the water absorption capacity of a concrete surface curing material, and has a curing effect on concrete.
The specific implementation mode is as follows:
in order that the above objects, features and advantages of the present invention may be more clearly understood, the present invention is described in further detail below with reference to specific embodiments, it should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein and, therefore, the scope of the present invention is not limited by the specific embodiments disclosed below.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1:
the adhesive with controllable attenuation of bonding strength comprises the following raw materials in parts by weight:
45 parts of polyester polyol;
3 parts of calcium hydroxide;
1 part of sodium hydroxide;
49.5 parts of isocyanate prepolymer;
1 part of organic silicon;
0.5 part of catalyst.
The preparation steps comprise:
(1) mixing quantitative polyester polyol, calcium hydroxide, sodium hydroxide, a catalyst and the like at room temperature to obtain a component A;
(2) uniformly mixing the isocyanate prepolymer and the organic silicon to obtain a component B;
(3) and adding the component B into the component A to obtain the adhesive with controllable attenuation of the bonding strength.
Adhering the permeable template cloth to the surface of a steel template by using the obtained adhesive, wherein the initial adhesion strength is 1.2MPa, and the permeable template cloth is placed for 120min under the humidity of 90 percent, and the adhesion strength is 0.1 MPa; standing at 90% humidity for 360min, and bonding strength is 0.05 MPa.
Example 2:
the adhesive with controllable attenuation of bonding strength comprises the following raw materials in parts by weight:
40 parts of polyester polyol;
5 parts of calcium hydroxide;
1 part of sodium hydroxide;
53 parts of isocyanate prepolymer;
1 part of organic silicon;
0.5 part of catalyst.
The preparation steps comprise:
(1) mixing quantitative polyester polyol, calcium hydroxide, sodium hydroxide, a catalyst and the like at room temperature to obtain a component A;
(2) uniformly mixing the isocyanate prepolymer and the organic silicon to obtain a component B;
(3) and adding the component B into the component A to obtain the adhesive with controllable attenuation of the bonding strength.
Adhering the permeable template cloth to the surface of a steel template by using the obtained adhesive, wherein the initial adhesion strength is 1.15MPa, and the permeable template cloth is placed for 120min under the humidity of 90% and the adhesion strength is 0.8 MPa; standing at 90% humidity for 360min, and bonding strength is 0.08 MPa.
Example 3:
the adhesive with controllable attenuation of bonding strength comprises the following raw materials in parts by weight:
30 parts of polyester polyol;
4 parts of calcium hydroxide;
1.5 parts of sodium hydroxide;
57 parts of isocyanate prepolymer;
7 parts of organic silicon;
0.5 part of catalyst.
The preparation steps comprise:
(1) mixing quantitative polyester polyol, calcium hydroxide, sodium hydroxide, a catalyst and the like at room temperature to obtain a component A;
(2) Uniformly mixing the isocyanate prepolymer and the organic silicon to obtain a component B;
(3) and adding the component B into the component A to obtain the adhesive with controllable attenuation of the bonding strength.
Adhering the permeable template cloth to the surface of the steel template by using the obtained adhesive, wherein the initial adhesion strength is 0.95MPa, and the permeable template cloth is placed for 120min under the humidity of 90% and the adhesion strength is 0.23 MPa; standing at 90% humidity for 360min, and bonding strength is 0.07 MPa.
Example 4:
the adhesive with controllable attenuation of bonding strength comprises the following raw materials in parts by weight:
37 parts of polyester polyol;
4 parts of calcium hydroxide;
1.5 parts of sodium hydroxide;
53 parts of isocyanate prepolymer;
3 parts of organic silicon;
0.5 part of catalyst.
The preparation steps comprise:
(1) mixing quantitative polyester polyol, calcium hydroxide, sodium hydroxide, a catalyst and the like at room temperature to obtain a component A;
(2) uniformly mixing the isocyanate prepolymer and the organic silicon to obtain a component B;
(3) and adding the component B into the component A to obtain the adhesive with controllable attenuation of the bonding strength.
The water permeable template cloth is adhered to the surface of the steel template by the obtained adhesive, and the initial adhesion strength is 0.95 MPa. And soaking the steel die which is adhered with the obtained adhesive to the water-permeable template cloth in water for 45min, and then foaming the adhesive layer, wherein the cell size is 200-600 mu m, and the adhesive strength is 0.05 MPa.
Comparative example 1:
the adhesive with controllable attenuation of bonding strength comprises the following raw materials in parts by weight:
45 parts of polyester polyol;
8 parts of calcium hydroxide;
0.2 part of sodium hydroxide;
49.5 parts of isocyanate prepolymer;
1 part of organic silicon;
0.5 part of catalyst.
The preparation steps comprise:
(1) mixing quantitative polyester polyol, calcium hydroxide, sodium hydroxide, a catalyst and the like at room temperature to obtain a component A;
(2) uniformly mixing the isocyanate prepolymer and the organic silicon to obtain a component B;
(3) and adding the component B into the component A to obtain the adhesive with controllable attenuation of the bonding strength.
Adhering the permeable template cloth to the surface of the steel template by using the obtained adhesive, wherein the initial adhesion strength is 1.2MPa, and the permeable template cloth is placed for 120min under the humidity of 90 percent, and the adhesion strength is 1.1 MPa; standing at 90% humidity for 360min, and bonding strength is 1.0 MPa.
Comparative example 2:
the adhesive with controllable attenuation of bonding strength comprises the following raw materials in parts by weight:
42 parts of polyester polyol;
1 part of calcium hydroxide;
4 parts of sodium hydroxide;
53 parts of isocyanate prepolymer;
1 part of organic silicon;
0.5 part of catalyst.
The preparation steps comprise:
(1) mixing quantitative polyester polyol, calcium hydroxide, sodium hydroxide, a catalyst and the like at room temperature to obtain a component A;
(2) Uniformly mixing the isocyanate prepolymer and organic silicon to obtain a component B;
(3) and adding the component B into the component A to obtain the adhesive with controllable attenuation of bonding strength.
Adhering the permeable template cloth to the surface of a steel template by using the obtained adhesive, wherein the initial adhesion strength is 1.02MPa, and the permeable template cloth is placed for 120min under the humidity of 90 percent, and the adhesion strength is 0.78 MPa; the film is placed for 360min under the humidity of 90 percent, and the bonding strength is 0.58 MPa.
Comparative example 3:
the adhesive with controllable attenuation of bonding strength comprises the following raw materials in parts by weight:
30 parts of polyester polyol;
4 parts of calcium hydroxide;
1.5 parts of sodium hydroxide;
72 parts of isocyanate prepolymer;
16 parts of organic silicon;
0.5 part of catalyst.
The preparation steps comprise:
(1) mixing quantitative polyester polyol, calcium hydroxide, sodium hydroxide, a catalyst and the like at room temperature to obtain a component A;
(2) uniformly mixing the isocyanate prepolymer and the organic silicon to obtain a component B;
(3) and adding the component B into the component A to obtain the adhesive with controllable attenuation of the bonding strength.
Adhering the permeable template cloth to the surface of the steel template by using the obtained adhesive, wherein the initial adhesion strength is 0.75MPa, and the permeable template cloth is placed for 120min under the humidity of 90% and the adhesion strength is 0.63 MPa; standing at 90% humidity for 360min, and bonding strength is 0.47 MPa.
Comparative example 4:
the adhesive with controllable attenuation of bonding strength comprises the following raw materials in parts by weight:
45 parts of polyester polyol;
4 parts of calcium hydroxide;
1.5 parts of sodium hydroxide;
30 parts of isocyanate prepolymer;
3 parts of organic silicon;
0.5 part of catalyst.
The preparation steps comprise:
(1) mixing quantitative polyester polyol, calcium hydroxide, sodium hydroxide, a catalyst and the like at room temperature to obtain a component A;
(2) uniformly mixing the isocyanate prepolymer and the organic silicon to obtain a component B;
(3) and adding the component B into the component A to obtain the adhesive with controllable attenuation of the bonding strength.
The water permeable template cloth is adhered to the surface of the steel template by the obtained adhesive, and the initial adhesion strength is 0.85 MPa. And (3) soaking the steel die adhered with the obtained adhesive to the permeable template cloth in water for 45min, wherein the adhesive strength is 0.65MPa, and the adhesive layer is not foamed.
In conclusion, the material properties can meet the practical requirements within the scope of the claimed formulation. When the formula is beyond the range claimed by the invention, the bonding strength attenuation rate of the adhesive is obviously reduced, and the adhesive is not suitable for the use requirement of bonding special curing materials in concrete engineering.
Claims (7)
1. The adhesive with controllable attenuation of bonding strength is characterized by comprising polyester polyol, calcium hydroxide, sodium hydroxide, isocyanate prepolymer, organic silicon and a catalyst, wherein the adhesive comprises the following components in parts by mass based on 100 parts by mass:
25-45 parts of polyester polyol;
3-5 parts of calcium hydroxide;
1-2 parts of sodium hydroxide;
40-60 parts of isocyanate prepolymer;
1-10 parts of organic silicon;
0.1-1.0 part of catalyst;
the initial bonding strength of the adhesive is 1.2MPa, and the bonding strength of the adhesive is 0.05MPa after the adhesive meets water vapor for 6 hours.
2. The adhesive with controllable attenuation of bonding strength according to claim 1, characterized in that the polyester polyol is a commercially available material with a functionality of 2.0-3.5.
3. The adhesive with controllable attenuation of bonding strength according to claim 1, characterized in that the particle size of the calcium hydroxide is 50-1000 nm.
4. The adhesive with controllable attenuation of bonding strength according to claim 1, characterized in that the particle size of the sodium hydroxide is 10-200 μm.
5. The adhesive with controllable attenuation of bonding strength according to claim 1, characterized in that the isocyanate prepolymer is a prepolymer of hexamethylene diisocyanate, and the content of isocyanate is 10-18%.
6. The adhesive with controllable attenuation of bonding strength according to claim 1, characterized in that the organic silicon is one or more of vinyltrimethoxysilane, aminopropyltriethoxysilane, (glycidoxy) propyltrimethoxysilane.
7. The preparation method of the adhesive with controllable attenuation of bonding strength according to any one of claims 1 to 6, characterized in that all the components except the isocyanate prepolymer and the organosilicon are uniformly mixed at normal temperature, and then the isocyanate prepolymer and the organosilicon are mixed and added into the obtained mixed solution to obtain the adhesive with controllable attenuation of bonding strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150022.1A CN111286295B (en) | 2020-03-06 | 2020-03-06 | Adhesive with controllable attenuation of bonding strength and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010150022.1A CN111286295B (en) | 2020-03-06 | 2020-03-06 | Adhesive with controllable attenuation of bonding strength and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111286295A CN111286295A (en) | 2020-06-16 |
| CN111286295B true CN111286295B (en) | 2022-06-28 |
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| CN202010150022.1A Active CN111286295B (en) | 2020-03-06 | 2020-03-06 | Adhesive with controllable attenuation of bonding strength and preparation method thereof |
Country Status (1)
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4873775B2 (en) * | 2000-10-13 | 2012-02-08 | トーヨーポリマー株式会社 | 1-component urethane adhesive composition |
| CN109233731B (en) * | 2018-07-24 | 2020-12-25 | 广东恒大新材料科技有限公司 | Reactive hot-melt adhesive composition and preparation method and application thereof |
| CN109321193B (en) * | 2018-08-07 | 2021-04-27 | 中国乐凯集团有限公司 | Adhesive and preparation method and application thereof |
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