CN108586689B - Polyurethane elastomer material for building jointed boards and preparation method thereof - Google Patents
Polyurethane elastomer material for building jointed boards and preparation method thereof Download PDFInfo
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
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- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
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- C08G18/72—Polyisocyanates or polyisothiocyanates
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- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7628—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group
- C08G18/7642—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring
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- 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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- C08G18/81—Unsaturated isocyanates or isothiocyanates
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/06—Polyurethanes from polyesters
Abstract
The invention provides a polyurethane elastomer material for building jointed boards and a preparation method thereof. The polyurethane elastomer material comprises the following raw material components in parts by mass: 30-45 parts of diisocyanate, 80-100 parts of oligomer polyol, 3-10 parts of chain extender, 2-5 parts of triallyl isocyanurate and 0.5-2 parts of catalyst; the oligomer polyol comprises hydroxyl-terminated polybutadiene. The polyurethane elastomer material is prepared by mixing and dehydrating oligomer polyalcohol, triallyl isocyanurate and a catalyst, carrying out prepolymerization reaction on the mixture and diisocyanate, carrying out chain extension reaction on the mixture and a chain extender, and finally carrying out irradiation crosslinking by using gamma rays. The polyurethane elastomer material provided by the invention has high hardness, tensile strength, elongation at break, impact strength and bending strength, and is suitable for building panel materials.
Description
Technical Field
The invention belongs to the technical field of polyurethane elastomer materials, and particularly relates to a polyurethane elastomer material for building jointed boards and a preparation method thereof.
Background
Building panels are a class of building materials that are assembled to make building models or building entities. The materials commonly used for building jointed boards are wood, steel plates and the like, although the materials have higher strength, the materials are heavier, the splicing is not facilitated, the processing and the forming are difficult, and the manufactured building model or the manufactured entity is not easy to disassemble and reuse, so that the resource waste is caused. If the thermoplastic polymer material is used as the building splicing plate material instead of wood and steel, the building splicing plate can be conveniently processed into any shape, and the unnecessary splicing plates can be processed again, so that the working hours are greatly shortened, and the resource recycling is realized.
Thermoplastic polyurethane elastomer (TPU) is a high molecular synthetic material with excellent performance, has the elasticity of rubber and the hardness of plastic, and also has good mechanical property, wear resistance and resilience performance, is widely applied to the fields of conveyor belts, hoses, automobile parts, soles, synthetic leather, coatings, wires and cables and the like, and is a good building jointed board substitute material. However, the strength, especially the bending strength, of the common polyurethane elastomer material is low, and when the volume of the jointed boards is large and the model or the entity to be jointed is heavy, the common polyurethane elastomer material may not be enough to bear the self weight, so that the model or the entity is deformed or even collapsed.
Therefore, if the mechanical properties of the polyurethane elastomer material can be further improved, the application of the polyurethane elastomer material in the field of building panels is facilitated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a polyurethane elastomer material for building jointed boards and a preparation method thereof. The polyurethane elastomer material has high hardness, tensile strength, elongation at break, impact strength and bending strength, and is suitable for building panel materials.
In order to achieve the purpose, the invention adopts the following technical scheme:
on one hand, the invention provides a polyurethane elastomer material for building jointed boards, which comprises the following raw material components in parts by mass:
30 to 45 parts (e.g., 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, or 45 parts, etc.) of a diisocyanate, 80 to 100 parts (e.g., 80 parts, 81 parts, 82 parts, 83 parts, 84 parts, 85 parts, 86 parts, 87 parts, 88 parts, 89 parts, 90 parts, 91 parts, 92 parts, 93 parts, 94 parts, 95 parts, 96 parts, 97 parts, 98 parts, 99 parts, or 100 parts, etc.) of an oligomeric polyol, 3-10 parts (e.g., 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, or 10 parts, etc.) chain extender, 2-5 parts (e.g., 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, or 5 parts, etc.) triallyl isocyanurate, and 0.5-2 parts (e.g., 0.5 parts, 0.6 parts, 0.8 parts, 1 part, 1.2 parts, 1.3 parts, 1.5 parts, 1.6 parts, 1.8 parts, or 2 parts, etc.) catalyst;
the oligomer polyol comprises hydroxyl-terminated polybutadiene.
According to the invention, hydroxyl-terminated polybutadiene is selected as one of the oligomer polyols, and is matched with triallyl isocyanurate and other raw materials, and the molecular chain structure of the polyurethane elastomer is reasonably designed, so that the obtained polyurethane elastomer has higher hardness, tensile strength, elongation at break, impact strength and bending strength, and meets the performance requirements of building panel materials.
As a preferred embodiment of the present invention, the diisocyanate is selected from one or a combination of at least two of Toluene Diisocyanate (TDI), diphenylmethane diisocyanate (MDI), Xylylene Diisocyanate (XDI), p-phenylene diisocyanate (PPDI) or Naphthalene Diisocyanate (NDI); typical but non-limiting examples of such combinations are: combinations of TDI and MDI, TDI and XDI, TDI and PPDI, TDI and NDI, MDI and XDI, MDI and PPDI, MDI and NDI, XDI and NDI, and the like, PPDI and NDI, and the like.
As a preferred embodiment of the present invention, the number average molecular weight of the oligomer polyol is 1000-; for example, 1000, 1200, 1300, 1500, 1600, 1800, 2000, 2200, 2300, 2500, etc.
Preferably, the hydroxyl-terminated polybutadiene content of the oligomer polyol is 40-60 wt%; for example, it may be 40 wt%, 41 wt%, 42 wt%, 43 wt%, 44 wt%, 45 wt%, 46 wt%, 47 wt%, 48 wt%, 49 wt%, 50 wt%, 51 wt%, 52 wt%, 53 wt%, 54 wt%, 55 wt%, 56 wt%, 57 wt%, 58 wt%, 59 wt%, or 60 wt%, etc.
As a preferred embodiment of the present invention, the oligomer polyol further comprises one or at least two of a polyethylene oxide polyol, a polypropylene oxide polyol, a polytetrahydrofuran polyol, a polycaprolactone polyol, a polyethylene adipate polyol, or a polybutylene adipate polyol; for example, it may be a polyoxyethylene polyol and a polyoxypropylene polyol, a polyoxyethylene polyol and a polycaprolactone polyol, a polyoxyethylene polyol and a polybutylene adipate polyol, a polyoxypropylene polyol and a polyethylene adipate polyol, a polytetrahydrofuran polyol and a polybutylene adipate polyol, a polytetrahydrofuran polyol and a polyethylene adipate polyol, or the like.
As a preferred embodiment of the present invention, the oligomer polyol is composed of 40 to 60 wt% (e.g., 40 wt%, 41 wt%, 42 wt%, 43 wt%, 44 wt%, 45 wt%, 46 wt%, 47 wt%, 48 wt%, 49 wt%, 50 wt%, 51 wt%, 52 wt%, 53 wt%, 54 wt%, 55 wt%, 56 wt%, 57 wt%, 58 wt%, 59 wt%, or 60 wt%, etc.) of hydroxyl-terminated polybutadiene and 40 to 60 wt% (e.g., 40 wt%, 41 wt%, 42 wt%, 43 wt%, 44 wt%, 45 wt%, 46 wt%, 47 wt%, 48 wt%, 49 wt%, 50 wt%, 51 wt%, 52 wt%, 53 wt%, 54 wt%, 55 wt%, 56 wt%, 57 wt%, 58 wt%, 59 wt%, or 60 wt%, etc.) of polycaprolactone polyol.
As a preferred technical scheme of the invention, the chain extender is trimethylolpropane.
As a preferable technical scheme of the invention, the catalyst is dibutyltin dilaurate and/or stannous octoate.
In another aspect, the present invention provides a method for preparing the polyurethane elastomer material, including the following steps:
(1) mixing oligomer polyol, triallyl isocyanurate and a catalyst according to a formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate to react to generate a polyurethane prepolymer I;
(3) mixing the polyurethane prepolymer I obtained in the step (2) with a chain extender, and reacting to generate a polyurethane prepolymer II;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using gamma rays to obtain the polyurethane elastomer material for the building jointed board.
As a preferred technical scheme of the invention, the mixing method in the step (1) is as follows: stirring at a rotation speed of 300-500r/min (e.g., 300r/min, 320r/min, 350r/min, 380r/min, 400r/min, 420r/min, 450r/min, or 500r/min, etc.) for 30-45min (e.g., 30min, 31min, 32min, 33min, 34min, 35min, 36min, 37min, 38min, 39min, 40min, 41min, 42min, 43min, 44min, or 45min, etc.).
Preferably, the reaction temperature in step (2) is 75-85 ℃, for example, 75 ℃, 76 ℃, 77 ℃, 78 ℃, 79 ℃, 80 ℃, 81 ℃, 82 ℃, 83 ℃, 84 ℃ or 85 ℃ and the like; the time is 2 to 4 hours, and may be, for example, 2 hours, 2.2 hours, 2.5 hours, 2.8 hours, 3 hours, 3.2 hours, 3.5 hours, 3.8 hours, or 4 hours.
Preferably, the mixing method in step (3) is: stirring is carried out at a rate of 800-1000r/min (e.g., 800r/min, 820r/min, 850r/min, 880r/min, 900r/min, 920r/min, 950r/min, 980r/min, 1000r/min, etc.) for 10-15s (e.g., 10s, 11s, 12s, 13s, 14s, 15s, etc.).
Preferably, the reaction temperature in step (3) is 85-90 deg.C, such as 85 deg.C, 86 deg.C, 87 deg.C, 88 deg.C, 89 deg.C, 90 deg.C, 91 deg.C, 92 deg.C, 93 deg.C, 94 deg.C or 95 deg.C etc.; the time is 3 to 6 hours, and may be, for example, 3 hours, 3.2 hours, 3.5 hours, 3.8 hours, 4 hours, 4.2 hours, 4.5 hours, 4.8 hours, 5 hours, 5.2 hours, 5.5 hours, 5.8 hours, or 6 hours.
Preferably, the irradiation dose in step (4) is 5-15 Mrad; for example, it may be 5Mrad, 6Mrad, 7Mrad, 8Mrad, 9Mrad, 10Mrad, 11Mrad, 12Mrad, 13Mrad, 14Mrad, or 15 Mrad.
As a preferred technical scheme of the invention, the preparation method comprises the following steps:
(1) stirring and mixing the oligomer polyalcohol, the triallyl isocyanurate and the catalyst for 30-45min at the rotating speed of 300-500r/min according to the formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate, and reacting for 2-4h at 75-85 ℃ to generate a polyurethane prepolymer I;
(3) stirring and mixing the polyurethane prepolymer I obtained in the step (2) and a chain extender at the rotating speed of 800-;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using 5-15Mrad gamma rays to obtain the polyurethane elastomer material for the building jointed board.
Compared with the prior art, the invention has the following beneficial effects:
the invention reasonably adjusts the proportion of the raw materials, so that the obtained polyurethane elastomer material has higher hardness, tensile strength, elongation at break, impact strength and bending strength, the hardness (Shore A) is 92-96, the tensile strength is 50-55MPa, the elongation at break is 280-390%, and the notch impact strength is 42-46kJ/m2The bending strength is 80-85MPa, and the composite material is suitable for building splicing plates.
Detailed Description
The technical solution of the present invention is further illustrated by the following specific examples. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
A polyurethane elastomer material for building jointed boards comprises the following raw material components in parts by mass:
30 parts TDI, 100 parts oligomeric polyol, 3 parts trimethylolpropane, 5 parts triallyl isocyanurate, and 0.5 part dibutyltin dilaurate;
wherein the oligomer polyol consists of 40 wt% hydroxyl-terminated polybutadiene (number average molecular weight 1300) and 60 wt% polycaprolactone polyol (number average molecular weight 2000, hydroxyl value 76mg KOH/g).
The preparation method of the polyurethane elastomer material for the building jointed boards comprises the following steps:
(1) stirring and mixing oligomer polyalcohol, triallyl isocyanurate and a catalyst for 45min at the rotating speed of 300r/min according to the formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate, and reacting for 4 hours at 75 ℃ to generate a polyurethane prepolymer I;
(3) stirring and mixing the polyurethane prepolymer I obtained in the step (2) and a chain extender at the rotating speed of 800r/min for 15s, and reacting at 85 ℃ for 6h to generate a polyurethane prepolymer II;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using 5Mrad gamma rays to obtain the polyurethane elastomer material for the building jointed board.
Example 2
A polyurethane elastomer material for building jointed boards comprises the following raw material components in parts by mass:
45 parts of MDI, 80 parts of oligomeric polyol, 10 parts of trimethylolpropane, 2 parts of triallylisocyanurate and 2 parts of dibutyltin dilaurate;
wherein the oligomer polyol consists of 45 wt% of hydroxyl-terminated polybutadiene (number average molecular weight 1300) and 55 wt% of polycaprolactone polyol (number average molecular weight 2000, hydroxyl value 76mg KOH/g).
The preparation method of the polyurethane elastomer material for the building jointed boards comprises the following steps:
(1) stirring and mixing oligomer polyalcohol, triallyl isocyanurate and a catalyst for 30min at the rotating speed of 500r/min according to the formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate, and reacting for 2 hours at 85 ℃ to generate a polyurethane prepolymer I;
(3) stirring and mixing the polyurethane prepolymer I obtained in the step (2) and a chain extender for 10s at the rotating speed of 1000r/min, and reacting for 3h at 90 ℃ to generate a polyurethane prepolymer II;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using 15Mrad gamma rays to obtain the polyurethane elastomer material for the building jointed board.
Example 3
A polyurethane elastomer material for building jointed boards comprises the following raw material components in parts by mass:
32 parts XDI, 96 parts oligomeric polyol, 4 parts trimethylolpropane, 4.5 parts triallyl isocyanurate and 1.8 parts stannous octoate;
wherein the oligomer polyol consists of 48 wt% hydroxyl-terminated polybutadiene (number average molecular weight 1300) and 52 wt% polycaprolactone polyol (number average molecular weight 2000, hydroxyl value 76mg KOH/g).
The preparation method of the polyurethane elastomer material for the building jointed boards comprises the following steps:
(1) stirring and mixing oligomer polyalcohol, triallyl isocyanurate and a catalyst for 40min at the rotating speed of 400r/min according to the formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate, and reacting for 3 hours at 78 ℃ to generate a polyurethane prepolymer I;
(3) stirring and mixing the polyurethane prepolymer I obtained in the step (2) and a chain extender at the rotating speed of 900r/min for 12s, and reacting at 88 ℃ for 4h to generate a polyurethane prepolymer II;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using 8Mrad gamma rays to obtain the polyurethane elastomer material for the building jointed board.
Example 4
A polyurethane elastomer material for building jointed boards comprises the following raw material components in parts by mass:
35 parts PPDI, 93 parts oligomeric polyol, 5 parts trimethylolpropane, 4 parts triallyl isocyanurate and 1 part stannous octoate;
wherein the oligomer polyol consists of 50 wt% of hydroxyl-terminated polybutadiene (number average molecular weight 1300) and 50 wt% of polycaprolactone polyol (number average molecular weight 2000, hydroxyl value 76mg KOH/g).
The preparation method of the polyurethane elastomer material for the building jointed boards comprises the following steps:
(1) stirring and mixing oligomer polyalcohol, triallyl isocyanurate and a catalyst for 35min at the rotating speed of 450r/min according to the formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate, and reacting for 3 hours at 80 ℃ to generate a polyurethane prepolymer I;
(3) stirring and mixing the polyurethane prepolymer I obtained in the step (2) and a chain extender for 10s at the rotating speed of 1000r/min, and reacting for 3.5h at 86 ℃ to generate a polyurethane prepolymer II;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using 10Mrad gamma rays to obtain the polyurethane elastomer material for the building jointed board.
Example 5
A polyurethane elastomer material for building jointed boards comprises the following raw material components in parts by mass:
38 parts NDI, 90 parts oligomeric polyol, 7 parts trimethylolpropane, 3.5 parts triallyl isocyanurate and 1.5 parts dibutyltin dilaurate;
wherein the oligomer polyol consists of 55 wt% of hydroxyl-terminated polybutadiene (number average molecular weight 1300) and 45 wt% of polycaprolactone polyol (number average molecular weight 2000, hydroxyl value 76mg KOH/g).
The preparation method of the polyurethane elastomer material for the building jointed boards comprises the following steps:
(1) stirring and mixing the oligomer polyalcohol, the triallyl isocyanurate and the catalyst for 30-45min at the rotating speed of 300-500r/min according to the formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate, and reacting for 2-4h at 75-85 ℃ to generate a polyurethane prepolymer I;
(3) stirring and mixing the polyurethane prepolymer I obtained in the step (2) and a chain extender at the rotating speed of 800-;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using 5-15Mrad gamma rays to obtain the polyurethane elastomer material for the building jointed board.
Example 6
A polyurethane elastomer material for building jointed boards comprises the following raw material components in parts by mass:
42 parts TDI, 85 parts oligomeric polyol, 8 parts trimethylolpropane, 2.5 parts triallyl isocyanurate, and 1.8 parts dibutyltin dilaurate;
wherein the oligomer polyol consists of 60 wt% hydroxyl-terminated polybutadiene (number average molecular weight 1300) and 40 wt% polycaprolactone polyol (number average molecular weight 2000, hydroxyl value 76mg KOH/g).
The preparation method of the polyurethane elastomer material for the building jointed boards comprises the following steps:
(1) stirring and mixing oligomer polyalcohol, triallyl isocyanurate and a catalyst for 45min at the rotating speed of 400r/min according to the formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate, and reacting for 3.5 hours at 82 ℃ to generate a polyurethane prepolymer I;
(3) stirring and mixing the polyurethane prepolymer I obtained in the step (2) and a chain extender for 10s at the rotating speed of 800r/min, and reacting for 3h at 90 ℃ to generate a polyurethane prepolymer II;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using 12Mrad gamma rays to obtain the polyurethane elastomer material for the building jointed board.
Comparative example 1
The difference from the example 1 is that the mass portion of the triallyl isocyanurate is 1 part, and other raw materials, the using amount and the preparation method are the same as the example 1.
Comparative example 2
The difference from example 1 is that the oligomer polyol is polycaprolactone polyol, and other raw materials, use amounts and preparation methods are the same as example 1.
Comparative example 3
The difference from example 1 is that the oligomer polyol is composed of 35 wt% of hydroxyl-terminated polybutadiene and 65 wt% of polycaprolactone polyol, and other raw materials, amounts and preparation methods are the same as example 1.
Comparative example 4
The difference from example 1 is that the oligomer polyol is composed of 65 wt% of hydroxyl-terminated polybutadiene and 35 wt% of polycaprolactone polyol, and other raw materials, amounts and preparation methods are the same as example 1.
The properties of the polyurethane elastomer materials provided in examples 1 to 6 and comparative examples 1 to 4 described above were measured, and the results are shown in the following table 1:
TABLE 1
The results in table 1 show that the polyurethane elastomer material obtained by the invention has high hardness, tensile strength, elongation at break, impact strength and bending strength by reasonably adjusting the proportion of the raw materials, and is suitable for building jointed boards; when the matching relationship among the raw materials is destroyed, the performance is reduced, and the performance requirement of the building jointed board cannot be met.
The applicant declares that the above description is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and it should be understood by those skilled in the art that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are within the scope and disclosure of the present invention.
Claims (12)
1. The polyurethane elastomer material for the building jointed boards is characterized by comprising the following raw material components in parts by mass:
30-45 parts of diisocyanate, 80-100 parts of oligomer polyol, 3-10 parts of chain extender, 2-5 parts of triallyl isocyanurate and 0.5-2 parts of catalyst;
the oligomer polyol consists of 40-60 wt% of hydroxyl-terminated polybutadiene and 40-60 wt% of polycaprolactone polyol;
the Shore A hardness of the polyurethane elastomer material is 92-96, the tensile strength is 50-55MPa, the elongation at break is 280-390 percent, and the notch impact strength is 42-46kJ/m2The bending strength is 80-85 MPa.
2. The polyurethane elastomeric material according to claim 1, wherein the diisocyanate is selected from one or a combination of at least two of toluene diisocyanate, diphenylmethane diisocyanate, xylylene diisocyanate, p-phenylene diisocyanate or naphthalene diisocyanate.
3. The polyurethane elastomeric material as claimed in claim 1, wherein the oligomer polyol has a number average molecular weight of 1000-2500.
4. The polyurethane elastomeric material according to claim 1, wherein the chain extender is trimethylolpropane.
5. The polyurethane elastomeric material according to claim 1, wherein the catalyst is dibutyltin dilaurate and/or stannous octoate.
6. Process for the preparation of polyurethane elastomeric material according to any one of claims 1 to 5, characterized in that it comprises the following steps:
(1) mixing oligomer polyol, triallyl isocyanurate and a catalyst according to a formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate to react to generate a polyurethane prepolymer I;
(3) mixing the polyurethane prepolymer I obtained in the step (2) with a chain extender, and reacting to generate a polyurethane prepolymer II;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using gamma rays to obtain the polyurethane elastomer material for the building jointed board.
7. The method of claim 6, wherein the mixing in step (1) is performed by: stirring for 30-45min at the rotating speed of 300-500 r/min.
8. The method according to claim 6, wherein the reaction in step (2) is carried out at a temperature of 75-85 ℃ for 2-4 hours.
9. The method of claim 6, wherein the mixing in step (3) is performed by: stirring for 10-15s at the rotating speed of 800-.
10. The method according to claim 6, wherein the reaction in step (3) is carried out at a temperature of 85 to 90 ℃ for 3 to 6 hours.
11. The method according to claim 6, wherein the irradiation dose in the step (4) is 5 to 15 Mrad.
12. The method of claim 6, comprising the steps of:
(1) stirring and mixing the oligomer polyalcohol, the triallyl isocyanurate and the catalyst for 30-45min at the rotating speed of 300-500r/min according to the formula, and dehydrating;
(2) mixing the mixed material obtained in the step (1) with diisocyanate, and reacting for 2-4h at 75-85 ℃ to generate a polyurethane prepolymer I;
(3) stirring and mixing the polyurethane prepolymer I obtained in the step (2) and a chain extender at the rotating speed of 800-;
(4) and (4) irradiating and crosslinking the polyurethane prepolymer II obtained in the step (3) by using 5-15Mrad gamma rays to obtain the polyurethane elastomer material for the building jointed board.
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| CN101358030A (en) * | 2008-09-05 | 2009-02-04 | 中国石油兰州石油化工公司 | Method for preparing high performance urethane elastomer for thermal barrier coating |
| CN106108237A (en) * | 2016-07-05 | 2016-11-16 | 晋江市池店镇娇鹏贸易有限公司 | A kind of resistant to bending material for sole of shoe |
| CN106366630A (en) * | 2016-08-31 | 2017-02-01 | 上海新力动力设备研究所 | Liner material for improving interfacial bonding of HTPB propellant and preparation method thereof |
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| CN101358030A (en) * | 2008-09-05 | 2009-02-04 | 中国石油兰州石油化工公司 | Method for preparing high performance urethane elastomer for thermal barrier coating |
| CN106108237A (en) * | 2016-07-05 | 2016-11-16 | 晋江市池店镇娇鹏贸易有限公司 | A kind of resistant to bending material for sole of shoe |
| CN106366630A (en) * | 2016-08-31 | 2017-02-01 | 上海新力动力设备研究所 | Liner material for improving interfacial bonding of HTPB propellant and preparation method thereof |
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