CN109233732B - Single-component strong adhesive and preparation method and application thereof - Google Patents
Single-component strong adhesive and preparation method and application thereof Download PDFInfo
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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
- C09J175/08—Polyurethanes from polyethers
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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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- 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
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
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- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
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- 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
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- C08G18/48—Polyethers
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- 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
- C08G18/67—Unsaturated compounds having active hydrogen
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- 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
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- 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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Abstract
The invention relates to a single-component strong adhesive, which comprises the following raw materials in percentage by weight: 20% -40% of polyether and polyester blended polyol; 20% -40% of isocyanate; 5% -10% of reactive tackifying resin; 5% -10% of polybutadiene modified epoxy resin; 15 to 35 percent of solvent. The adhesive also has strong initial adhesion, final adhesion and heat resistance, can be applied to the adhesion of PVC/density boards and the adhesion of beech/beech, and has wide prospect.
Description
Technical Field
The invention relates to the field of adhesives, in particular to a single-component strong adhesive and a preparation method and application thereof.
Background
The contact adhesives on the market are mainly pressure-sensitive adhesives. Including acrylate, vinyl ester, neoprene, and styrenic polymers, among others. Such adhesives are generally not useful for structural bonding and have low thermal, weather and chemical resistance. The structural adhesive in the market is generally a reactive adhesive, and comprises polyurethane polymer, epoxy polymer, acrylate polymer and the like, and has good heat resistance, weather resistance, water resistance and chemical resistance, and finally has high bonding strength. However, the initial tack is generally low and does not meet the requirement of high initial tack for contact adhesives.
Disclosure of Invention
Based on the above, the invention provides the single-component strong adhesive which has higher initial adhesion, final adhesion and heat resistance.
The specific technical scheme is as follows:
a single-component strong adhesive comprises the following raw materials in percentage by weight:
in one embodiment, the polyether and polyester blend polyol is selected from Kosin polyol-1000.
In one embodiment, the reactive tackifying resin is selected from phenolic resins.
In one embodiment, the phenolic resin is selected from one or more of Kosin resin-2# and Kosin resin-3 #.
In one embodiment, the polybutadiene-modified Epoxy resin is selected from Kosin Epoxy-1 #.
In one embodiment, the isocyanate is selected from Suprasec 2020.
In one embodiment, the solvent is selected from butanone or ethyl acetate.
In one embodiment, the single-component strong adhesive comprises the following raw materials in percentage by weight:
the invention also provides a preparation method of the single-component strong adhesive.
The specific technical scheme is as follows:
a preparation method of a single-component strong adhesive comprises the following steps:
heating the isocyanate to 70-90 ℃, adding a part of polyether and polyester blended polyol polymer, reacting for 1-2h, adding polybutadiene modified epoxy resin, and reacting for 1-2h to obtain a modified isocyanate prepolymer;
adding the rest polyether and polyester blending type polyol into the modified isocyanate prepolymer, reacting for 1-2h, reducing the temperature to 40-60 ℃, adding the solvent, reacting for 0.3-0.8h, cooling to room temperature, adding the reactive tackifying resin, and reacting for 0.5-1h to obtain the modified isocyanate prepolymer.
The invention also provides application of the single-component strong adhesive in PVC/density board bonding and beech/beech bonding.
Compared with the prior art, the invention has the following beneficial effects:
according to the single-component strong adhesive, polyether and polyester blended polyol are adopted to replace the step-by-step addition of polyether polyol and polyester polyol, so that the polyether and the polyester polyol react with isocyanate simultaneously, and the polyether and polyester structures can be relatively uniformly distributed in a molecular chain, so that the performance of the adhesive is more balanced; meanwhile, polybutadiene modified epoxy resin is introduced, a polybutadiene structure can be inserted into the molecular structure to form an interpenetrating network structure, the crystallinity and initial adhesion of the adhesive are improved, and the rigidity, heat resistance and adhesion of the adhesive can also be improved by the epoxy group. Meanwhile, in a reaction system of polyether, polyester polymer and polybutadiene modified epoxy resin, the crystallinity of the reaction system can be further improved by adding reactive tackifying resin in a matching way, so that the adhesive disclosed by the invention has higher initial adhesion.
The polyether and polyester blended polyol is preferably Kosin polyol-1000, the polybutadiene modified Epoxy resin is preferably Kosin Epoxy-1#, the reactive tackifying resin is preferably phenolic resin, the three can be mutually synergistic, a plurality of reaction nodes are formed in an adhesive system, an interpenetrating network structure is more favorably formed, and the initial adhesion of the adhesive is further improved. Meanwhile, isocyanate can further act with polybutadiene modified epoxy resin and phenolic resin, so that the initial adhesion and the bonding strength of the adhesive are improved, and the adhesive can keep higher final adhesion.
In the preparation process of the single-component strong adhesive, isocyanate reacts with a part of polyether and polyester blended polyol polymer, polybutadiene modified epoxy resin is added for further reaction to obtain a modified isocyanate prepolymer, and then the rest of polyether and polyester blended polyol polymer, reactive phenolic resin and other raw materials are added into the modified isocyanate prepolymer. The preparation of the modified isocyanate prepolymer is beneficial to increasing the initial adhesion and the final adhesion of the adhesive.
Drawings
FIG. 1 is a schematic representation of the initial and final tack tests (T peel).
FIG. 2 is a schematic diagram of a shear strength performance test.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the following description. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The single-component strong adhesive of the present invention, and the preparation method and application thereof are further described in detail with reference to the following specific examples.
All starting materials in the following specific embodiments are commercially available.
Polyether and polyester blended polyol Kosin polyol-1000 is purchased from Guangzhou Kesheng new material science and technology;
polybutadiene modified Epoxy resin Kosin Epoxy-1# was purchased from Guangzhou Kesheng New Material science and technology;
phenolic resin Kosin resin-2# is purchased from Guangzhou Kesheng new material science and technology;
phenolic resin Kosin resin-3# is purchased from Guangzhou Kesheng new material science and technology;
isocyanate: suprasec 2020 (liquefied MDI), available from Huntsman;
polyether polyol PPG-1000 was purchased from Dow chemical;
polyester polyol Desmophen1652 was purchased from Colesia;
terpene resin TR105 was purchased from arizona chemical usa.
Example 1
The embodiment provides a single-component strong adhesive which is prepared from the following raw materials in percentage by weight:
30% of polyether and polyester blended polyol Kosin polyol-1000, 30% of isocyanate Suprasec 2020, 5% of phenolic resin Kosin resin-2#, 10% of polybutadiene modified epoxy resin, 15% of butanone and 10% of ethyl acetate.
The preparation method comprises the following steps:
pouring isocyanate Suprasec 2020 into a stirring kettle, heating to 80 ℃, adding 20% of polyether and polyester blended polyol Kosin polyol-1000, controlling the reaction temperature between 70 and 90 ℃, reacting for 2 hours, adding 10% of polybutadiene modified epoxy resin, and reacting for 1 hour to obtain the modified isocyanate prepolymer.
Adding the rest polyether and polyester blend type polyol Kosin polyol-1000 into the modified isocyanate prepolymer, carrying out sealing reaction for 2h, reducing the temperature of the materials to 50 ℃, adding butanone and ethyl acetate, uniformly stirring, carrying out sealing reaction for 0.5h, adding phenolic resin Kosin resin-2#, and carrying out sealing reaction for 0.5h to obtain the adhesive.
Example 2
The embodiment provides a single-component strong adhesive which is prepared from the following raw materials in percentage by weight:
30% of polyether and polyester blended polyol Kosin polyol-1000, 30% of isocyanate Suprasec 2020, 8% of polybutadiene modified epoxy resin, 5% of phenolic resin Kosin resin-2#, 5% of phenolic resin Kosin resin-3#, 12% of butanone and 10% of ethyl acetate.
The preparation method comprises the following steps:
pouring isocyanate Suprasec 2020 into a stirring kettle, heating to 80 ℃, adding 20% of polyether and polyester blended polyol Kosin polyol-1000, controlling the reaction temperature between 70 and 90 ℃, reacting for 2 hours, adding 10% of polybutadiene modified epoxy resin, and reacting for 1 hour to obtain the modified isocyanate prepolymer.
Adding the rest polyether and polyester blend type polyol Kosin polyol-1000 into the isocyanate prepolymer, carrying out sealing reaction for 2h, reducing the temperature of the materials to 50 ℃, adding butanone and ethyl acetate, uniformly stirring, carrying out sealing reaction for 0.5h, adding phenolic resin Kosin resin-2#, carrying out sealing reaction for 0.5h, finally adding Kosin resin-3#, and carrying out sealing reaction for 0.5h to obtain the adhesive.
Example 3
The embodiment provides a single-component strong adhesive which is prepared from the following raw materials in percentage by weight:
35% of polyether and polyester blended polyol, 30% of isocyanate Suprasec 2020, 5% of phenolic resin Kosin resin-2#, 5% of phenolic resin Kosin resin-3#, 5% of polybutadiene modified epoxy resin, 10% of butanone and 10% of ethyl acetate.
The preparation method comprises the following steps:
pouring isocyanate Suprasec 2020 into a stirring kettle, heating to 80 ℃, adding 25% of polyether and polyester blended polyol Kosin polyol-1000, controlling the reaction temperature between 70 and 90 ℃, reacting for 2 hours, adding 5% of polybutadiene modified epoxy resin, and reacting for 1 hour to obtain the modified isocyanate prepolymer.
Adding the rest polyether and polyester blend type polyol Kosin polyol-1000 into the isocyanate prepolymer, carrying out sealing reaction for 2h, reducing the temperature of the materials to 50 ℃, adding butanone and ethyl acetate, uniformly stirring, carrying out sealing reaction for 0.5h, adding phenolic resin Kosin resin-2#, carrying out sealing reaction for 0.5h, finally adding Kosin resin-3#, and carrying out sealing reaction for 0.5h to obtain the adhesive.
Example 4
The embodiment provides a single-component strong adhesive which is prepared from the following raw materials in percentage by weight:
35% of polyether and polyester blended polyol, 30% of isocyanate Suprasec 2020, 5% of phenolic resin Kosin resin-2#, 5% of phenolic resin Kosin resin-3#, 5% of polybutadiene modified epoxy resin, 10% of butanone and 10% of ethyl acetate.
The preparation method comprises the following steps:
pouring isocyanate SUPRASEC 2020 into a stirring kettle, heating to 80 ℃, adding all polyether and polyester blend type polyol Kosin polyol-1000, uniformly stirring, carrying out sealing reaction for 2h, adding 5% polybutadiene epoxy resin, reacting for 1h, reducing the temperature of the materials to 50 ℃, adding butanone and ethyl acetate, uniformly stirring, carrying out sealing reaction for 0.5h, adding phenolic resin Kosin resin-2# and phenolic resin 3# and carrying out sealing reaction for 0.5h to obtain the adhesive.
Comparative example 1
This comparative example provides an adhesive substantially the same as example 1 except that the polyether and polyester blend polyol Kosin polyol-1000 was replaced with a mixture of polyether polyol PPG-1000 (Dow chemical) and polyester polyol Desmophen1652 (Corswere).
The material is prepared from the following raw materials in percentage by weight:
15 percent of polyether polyol PPG-1000, 15 percent of polyester polyol Desmophen1652, 30 percent of isocyanate SUPRASEC 2020, 5 percent of phenolic resin Kosin resin-2#, 10 percent of polybutadiene modified epoxy resin, 15 percent of butanone and 10 percent of ethyl acetate.
The preparation method comprises the following steps:
firstly, 15 percent of polyether polyol PPG-1000 and 15 percent of polyester polyol Desmophen1652 are stirred uniformly in advance for standby. Pouring isocyanate Suprasec 2020 into a stirring kettle, heating to 80 ℃, adding 20% (mixed in advance) of polyether and polyester, controlling the reaction temperature between 70 and 90 ℃, reacting for 2 hours, adding 10% of polybutadiene modified epoxy resin, reacting for 1 hour to obtain a modified isocyanate prepolymer, then continuously adding the rest mixed polyether and polyester in advance, sealing and reacting for 2 hours, reducing the material temperature to 50 ℃, adding butanone and ethyl acetate, uniformly stirring, sealing and reacting for 0.5 hour, then adding phenolic resin Koresin #, and sealing and reacting for 0.5 hour to obtain the adhesive.
Comparative example 2
This comparative example provides an adhesive that is essentially the same as example 1, except that the reactive tackifying resin is replaced with a terpene resin.
The material is prepared from the following raw materials in percentage by weight:
30% of polyether and polyester blended polyol Kosin polyol-1000, 30% of isocyanate Suprasec 2020, 5% of terpene resin TR105, 10% of polybutadiene modified epoxy resin, 15% of butanone and 10% of ethyl acetate.
The preparation method comprises the following steps:
pouring isocyanate Suprasec 2020 into a stirring kettle, heating to 80 ℃, adding 20% of polyether and polyester blend type polyol Kosin polyol-1000, controlling the reaction temperature to be 70-90 ℃, reacting for 2 hours, adding 10% of polybutadiene modified epoxy resin, reacting for 1 hour to obtain a modified isocyanate prepolymer, then continuously adding the rest polyether and polyester blend type polyol Kosin polyol-1000, sealing and reacting for 2 hours, reducing the material temperature to 50 ℃, adding butanone and ethyl acetate, uniformly stirring, sealing and reacting for 0.5 hour, then adding terpene resin TR105, and sealing and reacting for 0.5 hour to obtain the adhesive.
Performance testing and applications
1. Initial adhesion, final adhesion (T peel) test method (as shown in figure 1): reference is made to GB/T2791-.
The specific method comprises the following steps: the adhesives prepared in examples 1 to 4 and comparative examples 1 to 2 were uniformly coated on a PVC film having a width of 1 inch using a coater, respectively, a stopwatch was started, after naturally air-drying for 3 minutes at room temperature, the two films were laminated, rolled out, and loaded into a machine, and when the stopwatch showed 4 minutes, the peel force, i.e., initial tack, was measured, and after 48 hours, the peel force, i.e., final tack, was measured.
2. Shear strength performance test (see fig. 2): reference is made to GB 7124 and 1986.
The instrument comprises the following steps: automatic pneumatic press, stretcher, measuring tool with precision of 1 mm.
Test piece: water content 10 + -2%, density 700 + -100 Kg/m3Beech (25 × 30 × 10).
Preparation of a sample: the adhesives prepared in examples 1-4 and comparative examples 1-2 were applied to the adhesive surfaces with an adhesive area of 25mm by 25mm and a coating weight of 100g/m2Using an automatic sample pressurizing machine to press two test piecesLaminating the adhesive to form a sample, applying 0.1-0.2N/mm2The pressure of (a).
The testing steps are as follows:
(1) measuring the length and width of the glued part of the sample by using a measuring tool;
(2) the prepared test specimen is placed in a holder with the applied forces parallel to each other, and the stretcher is started and the maximum load in shear is recorded.
The calculation method comprises the following steps:
(1) calculation of shear Strength: ═ P/(L X B)
In the formula: shear strength, MPa or N/mm2
P- -maximum load at break of specimen, N
L- -length of the glued part of the sample, mm
B- -width of the glued part of the sample, mm
(2) The samples representing the same properties are generally not less than five.
The substrate used for the compression shear test was a standard beech, the length x width x height of which corresponds to 30 x 25 x 10mm, by applying a constant pressure on an automatic press3；
The field temperature error does not exceed 1 ℃;
the bonding overlap area is 25X 25mm2。
3. Density board bonding and heat resistance test
Respectively and uniformly coating the adhesives prepared in the examples 1-4 and the comparative examples 1-2 on a PVC film material with the width of 1 inch by using a film coater, starting a stopwatch, naturally airing for 1 minute at room temperature, then pasting the PVC film material on the surface of a density board, flattening, tearing the PVC film according to the interval time in the tables 1-3, observing the damage condition of the material, simultaneously placing the adhered board at room temperature for 24 hours, placing the board in a 100 ℃ oven for 4 hours, taking out the board for natural cooling, observing the phenomena of cracking, bulging and the like at the bonding part of the film material and the density board, finally tearing the PVC film, and observing the damage condition of the material.
The test results are shown in tables 1-3, with a test temperature of 25 ℃.
Table 1 examples 1-2 various performance parameters
Table 2 examples 3-4 various performance parameters
TABLE 3 comparative examples 1-2 Performance parameters
As can be seen from tables 1-3, the single-component strong adhesives of examples 1-4 have higher initial adhesion and final adhesion, and can reduce the pressing time in the early stage of use and improve the production efficiency in multiples. The results of the PVC/density board adhesion test showed that when the PVC film was torn off after 15 minutes using the adhesive of example 1, glue stringing occurred, when the PVC film was torn off after 10 minutes using the adhesives of examples 2 and 3, glue stringing occurred, and that even when the PVC film was torn off after 10 minutes using the adhesive of example 3, shallow layer failure of the density board occurred, indicating that the initial adhesion of the adhesives of examples 1-3 was high, and that the preparation method of the adhesive of example 4 was slightly different from that of examples 1-3, and the initial adhesion was slightly weak. The results of the compression shear strength tests show that the adhesives of examples 1-4 all have a strength exceeding 6MPa after 24 hours, and meet the structural bonding requirements, while the compression shear strength of conventional pressure-sensitive adhesives does not substantially exceed 2 MPa. And the adhesives of examples 1-4 had very good heat resistance.
In comparative example 1, the initial adhesion of the adhesive was lower and no material was broken in a short time in the PVC/density sheet adhesion test, compared with the case of adding the polyether polyol, Kosin polyol-1000 in example 1, to which the mixed polyether polyol PPG-1000 and polyester polyol Desmophen1652 were added. The polyether polyol and the polyester polyol of different types can not form an interpenetrating network structure with the polybutadiene modified epoxy resin and the reactive tackifying resin when added, so that the initial adhesion is increased.
In comparative example 2, the initial adhesion of the adhesive was lower than that of the adhesive obtained by adding the phenolic resin in example 1, and no material was broken in a short time in the PVC/density sheet adhesion test, indicating that the initial adhesive strength was weak, and the initial adhesion of the adhesive could not be improved by adding the terpene tackifying resin.
Comparative examples 1 and 2 show that the combination of polybutadiene modified epoxy resin, reactive tackifying resin and polyether and polyester blended polyol has an important effect on promoting the improvement of the initial adhesion of the adhesive.
Comparison of Performance
The performance of the one-component adhesive of example 1 was compared with a commercially available adhesive, wherein the specific method of the heat resistance test was: and (3) putting the bonded PVC and density board into a 60 ℃ oven for 8h, taking out, observing, if cracking exists, the heat resistance is less than 60 ℃, if no cracking exists, the bonded PVC and density board are continuously put into an 80 ℃ oven for 8h, taking out, observing, if cracking exists, the heat resistance is less than 80 ℃, if no cracking exists, the bonded PVC and density board are continuously put into a 100 ℃ oven for 8h, taking out, observing, if cracking exists, the bonded PVC and density board are continuously put into a 100 ℃ oven for 100 ℃, otherwise, the. Initial adhesion, final adhesion and tensile shear tests refer to the above performance test methods. The results are shown in Table 4.
Table 4 comparison of properties
As can be seen from Table 4, the adhesive of example 1 of the present invention has a longer shelf life than several commercially available adhesives, and reduces waste and environmental pollution caused by the easy expiration of the product. The adhesive of the embodiment 1 does not contain toxic solvents of triphenylene and halogenated hydrocarbon, and is beneficial to physical and psychological health of operators. In contrast, the adhesive of example 1 had higher initial tack, final tack and heat resistance.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The single-component strong adhesive is characterized by comprising the following raw materials in percentage by weight:
and the polyether and polyester blended polyol is Kosin polyol-1000, the reactive tackifying resin is selected from phenolic resin, and the polybutadiene modified Epoxy resin is selected from Kosin Epoxy-1 #.
2. The one-component strong adhesive according to claim 1, wherein the phenolic resin is one or more selected from the group consisting of Kosin resin-2# and Kosin resin-3 #.
3. One-component strong adhesive according to any one of claims 1 to 2, characterized in that the isocyanate is selected from Suprasec 2020.
4. One-component strong adhesive according to any one of claims 1 to 2, wherein the solvent is selected from methyl ethyl ketone or ethyl acetate.
5. The one-component strong adhesive according to any one of claims 1 to 2, which comprises the following raw materials in percentage by weight:
6. a method for preparing a one-component strong adhesive according to any one of claims 1 to 5, comprising the steps of:
heating the isocyanate to 70-90 ℃, adding a part of polyether and polyester blended polyol polymer, reacting for 1-2h, adding the polybutadiene modified epoxy resin, and reacting for 1-2h to obtain a modified isocyanate prepolymer;
adding the rest polyether and polyester blending type polyol into the modified isocyanate prepolymer, reacting for 1-2h, reducing the temperature to 40-60 ℃, adding the solvent, reacting for 0.3-0.8h, cooling to room temperature, adding the reactive tackifying resin, and reacting for 0.5-1h to obtain the modified isocyanate prepolymer.
7. Use of the one-component strong adhesive according to any one of claims 1 to 5 for bonding building decoration materials having a high initial adhesion requirement.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5053465A (en) * | 1989-05-12 | 1991-10-01 | Texaco Chemical Company | Epoxy polyurethane polyureas from epoxy resin, blocked isocyanate prepolymer and polyetherpolyamine |
| CN1280156A (en) * | 2000-07-11 | 2001-01-17 | 湖北省化学研究所 | Anisotyopic conductive adhesive and its preparing method |
| CN105038563A (en) * | 2015-09-01 | 2015-11-11 | 重庆中科力泰高分子材料股份有限公司 | Single-component alcohol-soluble environment-friendly high-temperature-resisting polyurethane adhesive and preparation method thereof |
| CN106832307A (en) * | 2017-01-16 | 2017-06-13 | 美瑞新材料股份有限公司 | A kind of preparation method of polyester ether polylol |
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| US5053465A (en) * | 1989-05-12 | 1991-10-01 | Texaco Chemical Company | Epoxy polyurethane polyureas from epoxy resin, blocked isocyanate prepolymer and polyetherpolyamine |
| CN1280156A (en) * | 2000-07-11 | 2001-01-17 | 湖北省化学研究所 | Anisotyopic conductive adhesive and its preparing method |
| CN105038563A (en) * | 2015-09-01 | 2015-11-11 | 重庆中科力泰高分子材料股份有限公司 | Single-component alcohol-soluble environment-friendly high-temperature-resisting polyurethane adhesive and preparation method thereof |
| CN106832307A (en) * | 2017-01-16 | 2017-06-13 | 美瑞新材料股份有限公司 | A kind of preparation method of polyester ether polylol |
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| 增粘树脂对湿固化聚氨酯热熔胶性能的影响;张于弛;《广州化学》;20151231;第40卷(第4期);第43-46页 * |
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| CN109233732A (en) | 2019-01-18 |
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