CN112852378B - Reactive polyurethane hot melt adhesive - Google Patents
Reactive polyurethane hot melt adhesive Download PDFInfo
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- CN112852378B CN112852378B CN202110041084.3A CN202110041084A CN112852378B CN 112852378 B CN112852378 B CN 112852378B CN 202110041084 A CN202110041084 A CN 202110041084A CN 112852378 B CN112852378 B CN 112852378B
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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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/721—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7621—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring being toluene diisocyanate including isomer mixtures
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/775—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/81—Unsaturated isocyanates or isothiocyanates
- C08G18/8125—Unsaturated isocyanates or isothiocyanates having two or more isocyanate or isothiocyanate groups
Abstract
The invention aims to provide a reaction type polyurethane hot melt adhesive, which comprises the raw materials of polyol, first diisocyanate, second diisocyanate and third diisocyanate. Wherein, the polyol reacts with the first diisocyanate, the second diisocyanate and the third diisocyanate to obtain the product. Under the conditions of low temperature (below minus 5 ℃) and humidity more than 50 percent RH, the reactive polyurethane hot melt adhesive disclosed by the invention is adopted for sizing, so that the adhesive force of a common base material (PC \ ABS \ AI \ PVC \ stainless steel) is remarkably improved, and the shear strength of the base material is obviously improved. At the temperature, the curing time of the reactive polyurethane hot melt adhesive is also obviously improved.
Description
Technical Field
The invention relates to the field of hot melt adhesives, in particular to a reactive polyurethane hot melt adhesive.
Background
The hot melt adhesive is solid at room temperature, is melted into viscous liquid when heated to a certain temperature, is changed into solid after being cooled to the room temperature, has strong bonding effect, and is widely applied to bonding screens and frames of electronic products. In developed countries such as the United states, europe, japan, and the like, the market of the hot melt adhesive is rapidly increased, the total production accounts for more than 20% of the total production of the adhesive, and China is less than 10%. At present, the hot melt adhesive in China still has a large development space.
The hot melt adhesive is divided into the following parts according to chemical structures: (1) polyolefins such as PE, PP, etc.; (2) Ethylene and its copolymers, such as EVA, EEA, EAA, EVAL, etc.; (3) polyesters such as PES and the like; (4) polyamides, such as PA and the like; and (5) polyurethanes such as PU and the like. According to the form of the product, the product can be divided into colloidal particles, rubber powder, rubber films, rubber rods and the like.
The hot melt adhesive generally contains isocyanate groups and/or urethane groups with strong polarity and high chemical activity, so that the hot melt adhesive has excellent chemical bonding force with various materials, and the molecules usually contain hydrogen bonds, which is beneficial to increasing the cohesion of macromolecules, thereby ensuring that the bonding is firmer.
The common hot melt adhesive has excellent fast curing and ultrahigh bonding strength at normal temperature, so that the common hot melt adhesive is a mature product. However, the common hot melt adhesives are not suitable for applications at low temperatures, and have the main disadvantages that: when bonding is carried out at low temperature, the common hot melt adhesive basically has no strength; after bonding, curing for 24 hours, and testing, wherein the strength is weak or the value approaches zero; the curing time is also very slow. The above defects are not favorable for the service performance of the product after production.
Disclosure of Invention
In the context of the present invention, the term "open time" is intended to mean the maximum time period from the application of the hot melt adhesive until the surface can still adhere to the substrate. The hot melt adhesive has good bonding effect within the opening time, and the operation of manufacturers during production is not facilitated if the opening time is too long or too short.
The invention relates to a reactive polyurethane hot melt adhesive which has the performances of quick curing and ultrahigh bonding strength at low temperature.
The present invention is realized by the following means.
A reaction type polyurethane hot melt adhesive is prepared from raw materials including polyol, first diisocyanate, second diisocyanate and third diisocyanate;
the first diisocyanate is selected from one or more of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, p-phenylene diisocyanate, methylcyclohexyl diisocyanate and lysine diisocyanate;
the second diisocyanate is an acrylic modified diisocyanate prepared by the following method: reacting epoxy resin with organic acid containing sulfhydryl group to obtain an intermediate product 1, and reacting the intermediate product 1 with diisocyanate or a derivative thereof to obtain second diisocyanate;
the third diisocyanate is a vegetable oil-modified diisocyanate prepared by the following method: reacting vegetable oil under the catalysis of fluoboric acid to obtain an intermediate product 2, and reacting the intermediate product 2 with diisocyanate or a derivative thereof to obtain third diisocyanate;
wherein the mole number of the hydroxyl in the polyol is more than or equal to the sum of the mole numbers of the isocyanate groups in the first diisocyanate, the second diisocyanate and the third diisocyanate.
Further, the polyol is selected from one or more of polyether polyol and polyester polyol.
Further, the epoxy resin is selected from one or more of E51 epoxy resin, E44 epoxy resin, E12 epoxy resin, E42 epoxy resin, E54 epoxy resin, E20 epoxy resin, E03 epoxy resin and E06 epoxy resin.
Further, the thiol-containing organic acid is selected from cysteine, acetylcysteine, homocysteine, 3-mercaptopropionic acid, dithiocarboxylic acid, or thioglycolic acid.
Further, the diisocyanate or the derivative thereof is selected from one or more of diphenylmethane diisocyanate, tetramethyl m-xylylene diisocyanate and dimethyl diphenylmethane diisocyanate.
Further, the vegetable oil is selected from one or more of olive oil, rapeseed oil, castor oil, corn oil, rice bran oil, grape seed oil, and linseed oil.
Further, the diisocyanate or its derivative is selected from one or more of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate.
Further, the reactive polyurethane hot melt adhesive comprises the following raw materials in parts by mole:
10-50 parts of polyol, 5-25 parts of first diisocyanate, 5-20 parts of second diisocyanate and 1-5 parts of third diisocyanate.
Further, the polyether polyol is selected from one or more of PPG-1000, PPG-2000, PPG-3000, PPG-6000 and PPG-8000.
Further, the polyester polyol is selected from one or more of PDA-1000, PDA-2000, PEA-1000, PEA-2000, PBA-580, PBA-2000, PEBA-2000, PEDA-1500 and PEDA-2000.
The invention has the following beneficial effects:
under the conditions of low temperature (below minus 5 ℃) and humidity more than 50 percent RH, the reactive polyurethane hot melt adhesive is adopted for gluing, so that the adhesive force of a common base material (PC \ ABS \ AI \ PVC \ stainless steel) is obviously improved, and the shear strength of the base material tested at normal temperature is obviously improved after the base material is solidified at the temperature of minus 5 ℃. At the temperature, the opening time of the reactive polyurethane hot melt adhesive is more beneficial to manufacturers to produce.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following examples are listed. The starting materials, reactions and work-up procedures which are given in the examples are, unless otherwise stated, those which are customary on the market and are known to the person skilled in the art.
Example 1
A reactive polyurethane hot melt adhesive comprises raw materials of PPG-1000, first diisocyanate toluene diisocyanate, second diisocyanate and third diisocyanate.
The second diisocyanate is prepared by the following method:
s1, stirring 1 equivalent of E51 epoxy resin and 2.2 equivalents of cysteine to react for 1.5h in a catalytic amount of tetrabutylammonium bromide at 120 ℃ in a nitrogen atmosphere to obtain an intermediate product 1;
s2, stirring and reacting the intermediate product 1 with equivalent diphenylmethane diisocyanate for 1.5h in the nitrogen atmosphere at 120 ℃ and in a catalytic amount of dibutyltin dilaurate system to obtain second diisocyanate.
The third diisocyanate is prepared by the following method:
s1, stirring and reacting olive oil and PPG-1000 for 1.5h at 200 ℃ in a catalytic amount of fluoboric acid system in a nitrogen atmosphere to obtain an intermediate product 2;
s2, stirring and reacting the intermediate product 2 with equivalent diphenylmethane diisocyanate at 120 ℃ in a nitrogen atmosphere for 1.5h in a catalytic amount of dibutyltin dilaurate system to obtain third diisocyanate.
The reactive polyurethane hot melt adhesive is prepared by the following method:
in a reaction kettle, stirring 11 parts of PPG-1000, 5 parts of first diisocyanate, 5 parts of second diisocyanate and 1 part of third diisocyanate in a catalytic amount of dibutyltin dilaurate at 120 ℃ in a nitrogen atmosphere for 1.5 hours to obtain a product.
Example 2
A reaction type polyurethane hot melt adhesive comprises raw materials of PPG-2000, first diisocyanate diphenylmethane diisocyanate, second diisocyanate and third diisocyanate.
The second diisocyanate is prepared by the following method:
s1, stirring 1 equivalent of E44 epoxy resin and 2.2 equivalents of acetylcysteine to react for 2.5 hours at 120 ℃ in a catalytic amount of tetrabutylammonium bromide under the atmosphere of nitrogen, so as to obtain an intermediate product 1;
s2, stirring and reacting the intermediate product 1 with isophorone diisocyanate with equivalent weight for 2.5 hours in a nitrogen atmosphere at 120 ℃ and in a catalytic amount of dibutyltin dilaurate system to obtain second diisocyanate.
The third diisocyanate is prepared by the following method:
s1, stirring and reacting rapeseed oil and PPG-2000 for 2.5 hours at 200 ℃ in a catalytic amount of fluoroboric acid system in a nitrogen atmosphere to obtain an intermediate product 2;
s2, stirring and reacting the intermediate product 2 with isophorone diisocyanate with equivalent weight for 2.5 hours in a nitrogen atmosphere at 120 ℃ and in a catalytic amount of dibutyltin dilaurate system to obtain third diisocyanate.
The reactive polyurethane hot melt adhesive is prepared by the following method:
in a reaction kettle, stirring 50 parts of PPG-2000, 25 parts of first diisocyanate, 20 parts of second diisocyanate and 5 parts of third diisocyanate in a catalytic amount of dibutyltin dilaurate at 120 ℃ in a nitrogen atmosphere for 2.5 hours to obtain a product.
Example 3
The raw materials of the reactive polyurethane hot melt adhesive comprise PEDA-2000, first diisocyanate p-phenylene diisocyanate, second diisocyanate and third diisocyanate.
The second diisocyanate is prepared by the following method:
s1, stirring 1 equivalent of E03 epoxy resin and 2.2 equivalents of thioglycollic acid to react for 3.5 hours at 120 ℃ in a catalytic amount of tetrabutylammonium bromide under the atmosphere of nitrogen, so as to obtain an intermediate product 1;
s2, stirring and reacting the intermediate product 1 with equivalent weight of hexamethylene diisocyanate for 3.5 hours in a nitrogen atmosphere at 120 ℃ and in a catalytic amount of dibutyltin dilaurate system to obtain second diisocyanate.
The third diisocyanate is prepared by the following method:
s1, stirring and reacting rapeseed oil and PEDA-2000 for 3.5 hours at 200 ℃ in a catalytic amount of fluoroboric acid system in a nitrogen atmosphere to obtain an intermediate product 2;
s2, stirring and reacting the intermediate product 2 with equivalent weight of hexamethylene diisocyanate for 3.5 hours in a nitrogen atmosphere at 120 ℃ and in a catalytic amount of dibutyltin dilaurate system to obtain third diisocyanate.
The reactive polyurethane hot melt adhesive is prepared by the following method:
in a reaction kettle, stirring and reacting 40 parts of PEDA-2000, 19 parts of first diisocyanate, 17 parts of second diisocyanate and 4 parts of third diisocyanate in a catalytic amount of dibutyltin dilaurate system at 120 ℃ in a nitrogen atmosphere for 3.5 hours according to molar parts to obtain a product.
Comparative example 1
The starting materials, the molar parts of the starting materials and the preparation method of comparative example 1 and example 1 are the same, with the only difference that comparative example 1 does not contain the third diisocyanate, but replaces it with an equal molar part of the first diisocyanate to obtain the product.
Comparative example 2
The starting materials, the molar parts of the respective starting materials, and the preparation methods of comparative example 2 and example 2 were the same, with the only difference that comparative example 2 did not contain the second diisocyanate, but instead replaced with an equal molar part of the first diisocyanate, to give the product.
Comparative example 3
The starting materials, the molar parts of the starting materials and the preparation methods of comparative example 3 and example 3 are identical, with the only difference that comparative example 3 does not contain the second diisocyanate and the third diisocyanate, but replaces the first diisocyanate in an equimolar amount, to give the product.
Test example
In order to test the properties of the samples of the reactive polyurethane hot melts obtained in examples 1 to 3 and comparative examples 1 to 3, the following tests were performed.
The method for testing the open time comprises the following steps:
opening time: reference is made to the standard HG/T3716-2003. The experimental procedure was as follows:
(1) Putting the sealed PUR hot melt adhesive prepolymer into an oven, heating to 120 ℃ for melting, and simultaneously heating a film scraper to 120 ℃;
(2) The test should be carried out in a room at normal temperature without air flow;
(3) A glue film gumming device is used for rapidly scraping a layer of glue with the thickness of 0.1mm out, and the glue is smeared on a smooth flat plate and the timing is started;
(4) And after the time is counted for 5s, covering the first adhesive paper strip on the cooled adhesive coating layer, and pressing the pressing surface of the weight on the first adhesive paper strip covered on the adhesive coating layer. Then sequentially covering other adhesive paper strips at intervals of 5s and pressurizing until the adhesive layer is cured and the paper strips can not be adhered;
(5) And cooling the adhered glue layer at room temperature for 20-30 min, manually peeling the adhered paper strips at a constant speed for 90 ℃, and finishing single-piece peeling within about 2 s. Recording the percentage of the fiber stripping area of each adhesive paper strip and the covering time of the adhesive paper strip, wherein s is taken as a unit;
(6) The test was repeated three times as described above.
The test results show that: the longest covering time of the bonding surface with the fiber stripping area of the bonding paper strip larger than 50 percent is taken as the opening time of the hot melt adhesive, and the range of the three measured values is not more than 5s. The test results are represented by the same values in three measurements.
The method for testing the shear strength comprises the following steps:
shear strength: reference is made to the standard GB T7124-2008. The experimental procedure was as follows:
(1) The cured samples were first heat equilibrated at-5 ℃ to 23 ℃ and then tested for shear strength at 23 ℃
(2) Selecting a standard sample wafer of 25mm multiplied by 100mm multiplied by 2mm, selecting a No. 21 stainless steel needle head to match with a dispenser to punch a glue layer of 8mm multiplied by 25mm multiplied by 0.1mm on the sample wafer;
(3) After dispensing, the sample pieces are bonded two by two, a fixed load of 2kg is applied on the sample pieces, and pressing is carried out for 15s. Then, respectively testing the shear strength of 0.5h,2h and 24h;
(4) The sample is symmetrically clamped on the clamp, and the distance from the clamping position to the nearest bonding end is 50mm +/-1 mm. A gasket can be used in the clamp to ensure that the acting force is in the bonding surface;
(5) The tensile testing machine performs the test at a constant testing speed, and the moving speed of the tensile testing machine is 5mm/min;
(6) The maximum load at which the test specimen fails in shear was recorded as the failure load.
The test results show that: the test results are expressed as the arithmetic mean of the breaking load (N) or tensile shear strength (MPa) of the test specimen. Tensile shear strength (MPa) is the breaking load (N) divided by the shear area (mm) 2 ) The result is calculated.
The test results are shown in table 1.
Table 1 performance parameters for examples 1-3 and comparative examples 1-3, all cured at-5 ℃ at 50% rh and then tested at 23 ℃ at 60% rh, were as follows:
from the above values, it can be seen that the curing time and shear strength properties of examples 1-3 are significantly better than those of comparative examples 1-3, respectively, and represent the advancement of the technical solution of the present invention.
Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.
Claims (9)
1. A reactive polyurethane hot melt adhesive is characterized in that raw materials of the reactive polyurethane hot melt adhesive comprise polyol, first diisocyanate, second diisocyanate and third diisocyanate;
the first diisocyanate is selected from one or more of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate, p-phenylene diisocyanate, methylcyclohexyl diisocyanate and lysine diisocyanate;
the second diisocyanate is an epoxy modified diisocyanate prepared by the following method: reacting epoxy resin with organic acid containing sulfhydryl group to obtain an intermediate product 1, and reacting the intermediate product 1 with diisocyanate or a derivative thereof to obtain second diisocyanate;
the third diisocyanate is a vegetable oil-modified diisocyanate prepared by the following method: reacting vegetable oil under the catalysis of fluoboric acid to obtain an intermediate product 2, and reacting the intermediate product 2 with diisocyanate or a derivative thereof to obtain third diisocyanate;
wherein the mole number of hydroxyl groups in the polyol is more than or equal to the sum of the mole numbers of isocyanate groups in the first diisocyanate, the second diisocyanate and the third diisocyanate;
the reactive polyurethane hot melt adhesive comprises the following raw materials in parts by mole:
10-50 parts of polyol, 5-25 parts of first diisocyanate, 5-20 parts of second diisocyanate and 1-5 parts of third diisocyanate.
2. The reactive polyurethane hot melt adhesive according to claim 1, wherein the polyol is one or more selected from the group consisting of polyether polyol and polyester polyol.
3. The reactive polyurethane hot melt adhesive of claim 1, wherein the epoxy resin is selected from one or more of E51 epoxy resin, E44 epoxy resin, E12 epoxy resin, E42 epoxy resin, E54 epoxy resin, E20 epoxy resin, E03 epoxy resin and E06 epoxy resin.
4. The reactive polyurethane hot melt adhesive of claim 1, wherein the thiol-group-containing organic acid is selected from cysteine, acetylcysteine, homocysteine, 3-mercaptopropionic acid, dithiocarboxylic acid, or thioglycolic acid.
5. The reactive polyurethane hot melt adhesive of claim 1, wherein the diisocyanate or derivative thereof is selected from one or more of diphenylmethane diisocyanate, tetramethylm-xylylene diisocyanate, and dimethyldiphenylmethane diisocyanate.
6. The reactive polyurethane hot melt adhesive of claim 1, wherein the vegetable oil is selected from one or more of olive oil, rapeseed oil, castor oil, corn oil, rice bran oil, grape seed oil, and linseed oil.
7. The reactive polyurethane hot melt adhesive according to claim 1, wherein the diisocyanate or derivative thereof is selected from one or more of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, dicyclohexylmethane diisocyanate.
8. The reactive polyurethane hot melt adhesive of claim 2, wherein the polyether polyol is selected from one or more of PPG-1000, PPG-2000, PPG-3000, PPG-6000, PPG-8000.
9. The reactive polyurethane hot melt adhesive of claim 2, wherein the polyester polyol is selected from one or more of PDA-1000, PDA-2000, PEA-1000, PEA-2000, PBA-580, PBA-2000, PEBA-2000, PEDA-1500, and PEDA-2000.
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| CN202110041084.3A CN112852378B (en) | 2021-01-13 | 2021-01-13 | Reactive polyurethane hot melt adhesive |
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| CN202110041084.3A CN112852378B (en) | 2021-01-13 | 2021-01-13 | Reactive polyurethane hot melt adhesive |
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| US6914102B2 (en) * | 2002-12-16 | 2005-07-05 | E. I. Du Pont De Nemours And Company | Thermoreactive hot-melt adhesives |
| CN103547194B (en) * | 2011-04-07 | 2016-03-23 | 澳大利亚界面有限公司 | The microwave curing of carpet plastisol |
| SG11201702845QA (en) * | 2014-10-29 | 2017-05-30 | Bicycle Therapeutics Ltd | Bicyclic peptide ligands specific for mt1-mmp |
| CN108048020B (en) * | 2017-12-29 | 2021-07-06 | 浙江华峰新材料有限公司 | Single-component moisture-curing reaction type polyurethane hot melt adhesive and preparation method thereof |
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Effective date of registration: 20230816 Address after: 529159 Workshop 1, Zone 13-2, Gujing Lingang Industrial Park, Xinhui District, Jiangmen City, Guangdong Province Patentee after: Huang Shibin Address before: 529145 workshop 1, area a, Gujing Lingang Industrial Park, Xinhui District, Jiangmen City, Guangdong Province Patentee before: Guangdong jingjisheng New Material Technology Co.,Ltd. |