CN114316184B - Water-swellable single-component prepolymer and preparation method and application thereof - Google Patents
Water-swellable single-component prepolymer and preparation method and application thereof Download PDFInfo
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- CN114316184B CN114316184B CN202111682243.4A CN202111682243A CN114316184B CN 114316184 B CN114316184 B CN 114316184B CN 202111682243 A CN202111682243 A CN 202111682243A CN 114316184 B CN114316184 B CN 114316184B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 229920005862 polyol Polymers 0.000 claims abstract description 56
- 150000003077 polyols Chemical class 0.000 claims abstract description 56
- 229920000570 polyether Polymers 0.000 claims abstract description 45
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 42
- 239000005060 rubber Substances 0.000 claims abstract description 25
- 229920001971 elastomer Polymers 0.000 claims abstract description 24
- 229920003023 plastic Polymers 0.000 claims abstract description 22
- 239000004033 plastic Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 15
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229920002121 Hydroxyl-terminated polybutadiene Polymers 0.000 claims abstract description 11
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims abstract description 10
- 239000012948 isocyanate Substances 0.000 claims abstract description 9
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 8
- -1 polymethylene Polymers 0.000 claims description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 3
- 229940008841 1,6-hexamethylene diisocyanate Drugs 0.000 claims description 2
- LFSYUSUFCBOHGU-UHFFFAOYSA-N 1-isocyanato-2-[(4-isocyanatophenyl)methyl]benzene Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=CC=C1N=C=O LFSYUSUFCBOHGU-UHFFFAOYSA-N 0.000 claims description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 2
- 239000005058 Isophorone diisocyanate Substances 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
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000005056 polyisocyanate Substances 0.000 claims description 2
- 229920001228 polyisocyanate Polymers 0.000 claims description 2
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 2
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 claims description 2
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 claims 1
- 239000006260 foam Substances 0.000 abstract description 4
- 238000005452 bending Methods 0.000 abstract description 2
- 238000005187 foaming Methods 0.000 abstract description 2
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000000047 product Substances 0.000 description 13
- 239000000376 reactant Substances 0.000 description 13
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 9
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 9
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 8
- 238000001816 cooling Methods 0.000 description 7
- 238000001035 drying Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 229920003225 polyurethane elastomer Polymers 0.000 description 7
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 6
- 239000002202 Polyethylene glycol Substances 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 5
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- 238000001308 synthesis method Methods 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
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- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 239000003085 diluting agent Substances 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
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- 208000025978 Athletic injury Diseases 0.000 description 1
- 208000034656 Contusions Diseases 0.000 description 1
- 229920002943 EPDM rubber Polymers 0.000 description 1
- 206010041738 Sports injury Diseases 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- TUVYSBJZBYRDHP-UHFFFAOYSA-N acetic acid;methoxymethane Chemical compound COC.CC(O)=O TUVYSBJZBYRDHP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000000386 athletic effect Effects 0.000 description 1
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- PASDCCFISLVPSO-UHFFFAOYSA-N benzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1 PASDCCFISLVPSO-UHFFFAOYSA-N 0.000 description 1
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- 238000005829 trimerization reaction Methods 0.000 description 1
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Abstract
The invention relates to the technical field of plastic materials, in particular to a water-swellable single-component prepolymer, a preparation method and application thereof. The water-swellable single-component prepolymer mainly comprises polyol A, isocyanate B, an auxiliary agent and a solvent, wherein the polyol A comprises polyether polyol C containing a hydrophilic chain segment, long-chain polyether polyol D and optionally hydroxyl-terminated polybutadiene. Polyether polyol C is a mixture of one or more polyethers containing ethylene oxide chain segments, and polyether polyol C is polyether with functionality less than or equal to 3 and molecular weight of 200-6000. The long-chain polyether polyol D is one or a mixture of more polyether polyols with molecular weight of 1000-6000. The water-swelling single-component prepolymer prepared by the invention has high foaming multiplying power, and the foam wraps instead of binding rubber particles, so that the deformation displacement of the rubber particles is smaller, and when the water-swelling single-component prepolymer is applied to plastic runway materials, the integral bending fracture condition of the plastic runway is good.
Description
Technical Field
The invention relates to the technical field of plastic materials, in particular to a water-swellable single-component prepolymer, a preparation method and application thereof.
Background
The plastic track, also called all-weather track and field athletic track, is usually composed of polyurethane prepolymer, mixed polyether, waste tyre rubber, EPDM rubber particles or PU particles, pigment, auxiliary agent and filler. The plastic track has the characteristics of good flatness, high compressive strength, proper hardness and elasticity and stable physical properties, is beneficial to the exertion of athlete speed and technology, effectively improves the athletic performance and reduces the injury rate.
The conventional plastic track is generally manufactured by using a polyurethane elastomer which is not foamed, but the conventional plastic track manufactured by the polyurethane elastomer manufacturing method is connected in a 'point-to-point bonding' way, and only the polyurethane elastomer at the contact point of the rubber particles is stressed, and most of the polyurethane elastomer exists on the surface of the rubber particles in a coating way and has no function of connecting the particles. Meanwhile, because the traditional polyurethane plastic track is of a hollow structure, in the frequent use process or under the influence of oxygen in the air and severe weather such as ultraviolet rays, rain, snow, ice and cold, the polyurethane elastomer is easy to age, peel, damage, wear and flat an anti-slip layer and the like, the functions of increasing the movement friction force, damping and preventing contusion cannot be continuously achieved, and the sports injury of a sporter is easy to be caused, so that the outdoor plastic track which is frequently used is paved again after the original plastic track is torn off after being used for 5-8 years, the mode not only causes the waste of extremely large materials and manpower, but also is easy to damage the original foundation materials.
Therefore, how to provide a polyurethane plastic track with long service life and good bonding effect, and the plastic track material prepared by the polyurethane plastic track has good performance and durability, which is a technical problem to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to provide a water-swellable single-component prepolymer, a preparation method and application thereof, and overcomes the defect of insufficient cohesiveness of a plastic track manufactured by the existing non-foaming polyurethane elastomer.
The technical scheme adopted for solving the technical problems is as follows:
a water-swellable single-component prepolymer mainly comprises polyol A and isocyanate B according to the weight ratio (25-55): (45-75), said polyol A comprising a polyether polyol C comprising hydrophilic segments and a long chain polyether polyol D.
Preferably, the polyol A further comprises hydroxyl-terminated polybutadiene.
Preferably, the polyether polyol C is present in the polyol a in an amount of more than 50%, preferably more than 75%.
Preferably, the polyether polyol C is a mixture of one or more polyethers containing ethylene oxide segments, and having an ethylene oxide segment content of more than 50%, preferably more than 80%; polyether polyol C is polyether with functionality less than or equal to 3 and molecular weight of 200-6000, preferably polyether with molecular weight of 600-3000.
Preferably, the long chain polyether polyol D is a mixture of one or more polyether polyols having a molecular weight of 1000-6000.
Preferably, the long-chain polyether polyol D consists essentially of polyether polyols having an ethylene oxide content of not more than 25% and a functionality of from 2 to 3.
Preferably, the hydroxyl-terminated polybutadiene, preferably a liquid hydroxyl-terminated polybutadiene having a molecular weight of 1500 to 4000, particularly preferably 2000 to 3000, is present in an amount of 0 to 20% by mass, preferably 0 to 5% by mass, of the polyol A.
Preferably, the isocyanate B is one or more of 2, 4-toluene diisocyanate, 2, 6-toluene diisocyanate, 4 '-methylene diphenyl diisocyanate, 2,4' -methylene diphenyl diisocyanate, 1, 6-hexamethylene diisocyanate, isophorone diisocyanate, polymethylene polyphenyl polyisocyanate and carbodiimide modified methylene diphenyl diisocyanate.
Preferably, the polyurethane foam also contains an auxiliary agent and a solvent, wherein the weight ratio of the sum of the weight of the polyol A and the weight of the isocyanate B to the auxiliary agent and the solvent is 100: (0-1): (0-30), wherein the auxiliary agent is a silane coupling agent; the solvent is one or more of ethyl acetate, butyl acetate, methyl ether acetate and solvent oil.
The preparation process of the water-swellable single-component prepolymer comprises the steps of mixing the polyol A, the isocyanate B and the solvent according to the proportion, reacting at 50-80 ℃, adding the auxiliary agent after NCO reaches a theoretical value, and uniformly stirring.
The application of the water-swellable single-component prepolymer is applied to a plastic track material and comprises the following steps: mixing the water-swellable single-component prepolymer and rubber particles according to the mass ratio of 1:1-10, filling the mixture into a mold, introducing water or steam, placing the mold into an oven for curing after the reaction is completed, and wrapping particles for the plastic track after the curing is completed.
The beneficial effects of the invention are as follows: the polyurethane prepolymer and water are foamed to form polyurethane foam, and rubber particles are completely wrapped to form a complete integrated structure. The foam has the advantages of uniform and dispersed stress, better mechanical structure and better elasticity, and better transverse supporting force provided by the foam.
Because the polyurethane foam completely fills the gaps of the rubber particles, the vibration of the polyurethane foam reduction structure is reduced, and the propagation of air noise of the plastic track is effectively blocked.
The foam-coated rubber particle runway further protects the runway from diseases, prevents ultraviolet rays and acid and alkali from being damaged, and prevents sand particles from being corroded, so that the service life of the runway is prolonged.
Detailed Description
Example 1
A water-swellable single-component prepolymer comprises the following synthesis method:
step one: dehydrating the two-functional polyethylene glycol C at 110 ℃ for 4-8 hours, and then preserving the heat in a constant-temperature drying container at 40 ℃;
step two: adding 451.7 parts of isomer of methylene diphenyl diisocyanate into a reaction kettle, heating to about 60-70 ℃, adding 548.3g of polyethylene glycol C in the first step into the reaction kettle in batches, controlling the reaction temperature to be not more than 75 ℃, and reacting for 2-4 hours, wherein the theoretical NCO of the reactant is 7.7, and the NCO=7.58 is actually measured, and the appearance is light yellow viscous liquid;
step three: and (2) adding 100 parts of propylene glycol methyl ether acetate into a reaction kettle, and uniformly stirring the reactant obtained in the step (II) at 40 ℃, wherein the obtained product is the reactant of the example 1.
In this example, polyethylene glycol C is an adduct of ethylene oxide, starting with diethylene glycol, and has a molecular weight of about 600. The content of 2,4 methylene diphenyl diisocyanate in the isomer of methylene diphenyl diisocyanate is 50-60%, and NCO is 33.3% MDI-50.
Example 2
A water-swellable single-component prepolymer comprises the following synthesis method:
step one: uniformly mixing 109 parts of polyether polyol A and 530 parts of polyether polyol B, dehydrating at 110 ℃ for 4-8 hours, and then cooling and placing in a constant-temperature drying container;
step two: adding 201 parts of isomer of methylene diphenyl diisocyanate into a reaction kettle, heating to about 60-70 ℃, adding the polyether polyol mixture in the first step into the reaction kettle in batches, controlling the reaction temperature to be not more than 75 ℃, and reacting for 2-4 hours, wherein the theoretical NCO of the reactant is 5%, NCO=5.12 is actually measured, the appearance is colorless to pale yellow liquid, and the obtained product is the reactant of the example 2;
step three: 100 parts of the product obtained in the step two, 10 parts of liquefied methylene diphenyl diisocyanate and 10 parts of propylene glycol methyl ether acetate are added into a reaction kettle and stirred uniformly at 40 ℃, and the obtained product is the reactant of the example 1.
In this example, polyether polyol A was a propylene glycol-based copolymer adduct of propylene oxide and hexane oxide, with propylene oxide accounting for 80% of the total content of the materials and having a molecular weight of about 2500. The polyether polyol B is diethylene glycol, propylene oxide and ethylene oxide copolymer adduct, and ethylene oxide accounts for 80% of the material content and has molecular weight of about 2000. The content of 2,4 methylene diphenyl diisocyanate in the isomer of methylene diphenyl diisocyanate is 50-60%, and NCO is 33.3% MDI-50. Liquefying methylene diphenyl diisocyanate, NCO 29.2% CD-C.
Example 3
A water-swellable single-component prepolymer comprises the following synthesis method:
step one: dehydrating 409 parts of polyether polyol D for 4-8 hours at the temperature of below 100 ℃ under vacuum of 5Torr until the water content of the system reaches below 200ppm, standing for 24 hours, and cooling to normal temperature;
step two: adding 102 parts of TDI into a reaction kettle, stirring uniformly, heating to 65-60 ℃, adding the obtained product in the step one into the reaction kettle, reacting for 4-8 hours, wherein the theoretical NCO of the obtained reactant is 6.9%, the measured NCO% is 6.83, the free TDI is 1.7%, the appearance is light yellow liquid, and the obtained product is the reactant of the example 3.
In this example, polyether polyol D is a glycerin-initiated, propylene oxide and ethylene oxide copolymer adduct, propylene oxide accounting for 25% of the total material content, and has a molecular weight of about 4000.
Example 4
A water-swellable single-component prepolymer comprises the following synthesis method:
step one: respectively adding polyether polyol E, polyethylene glycol C and hydroxyl-terminated polybutadiene F into a reaction kettle according to the mass of 120, 650 and 40 parts, uniformly stirring, dehydrating for 4-8 hours at the temperature of 100 ℃ under vacuum of 5Torr until the water content of the system reaches below 200ppm, maintaining stirring and cooling to normal temperature;
step two: the liquefied methylene diphenyl diisocyanate and the isomer of the methylene diphenyl diisocyanate are respectively put into a reaction kettle according to 575 parts by mass and 115 parts by mass, are uniformly mixed, are heated to 65-60 ℃, are added into the reaction kettle for reaction for 4-8 hours, and are terminated when the measured NCO% of the obtained reactant is about 7%;
step three: after adding 2.3 parts of silane coupling agent and 0.5 part of benzoyl chloride and stirring for 1 hour, the product obtained is the reactant of example 4
In this example, polyether polyol E was a glycerin-initiated, propylene oxide and ethylene oxide copolymer adduct, ethylene oxide was about 10% of the total content of the material, and the molecular weight was about 4800. Polyethylene glycol C is an adduct of ethylene oxide, starting from diethylene glycol, and has a molecular weight of about 600. The hydroxyl-terminated polybutadiene F has a molecular weight of about 3000 and a functionality of about 2. Liquefying methylenediphenyl diisocyanate NCO 29.2% CD-C. The content of 2,4 methylene diphenyl diisocyanate in the isomer of methylene diphenyl diisocyanate is 50-60%, and NCO is 33.3% MDI-50.
Example 5
An application of a water-swellable single-component prepolymer:
step one: the product of example 1 was prepared according to 1:6, uniformly stirring the mixture of the proportion of 6 and the clean and dry rubber particles in a stirrer;
step two: placing 500g of the mixture into a rubber floor mat mold with the volume of about 1L, and compacting and leveling;
step three: slowly pouring warm water with the temperature of 40 ℃ into the mixture until the warm water cannot be poured;
step four: putting the mould into a baking oven at 100 ℃ for curing for 2-6 hours;
step five: the mold was opened and the rubber sheet was placed in a drying oven and post-cured at 70 ℃ for 12 hours.
Example 6
An application of a water-swellable single-component prepolymer:
step one: the product of example 2 was prepared according to 1:6, uniformly stirring the mixture of the proportion of 6 and the clean and dry rubber particles in a stirrer;
step two: placing 500g of the mixture into a rubber floor mat mold with the volume of about 1L, and compacting and leveling;
step three: slowly pouring warm water with the temperature of 40 ℃ into the mixture until the warm water cannot be poured;
step four: putting the mould into a baking oven at 100 ℃ for curing for 2-6 hours;
step five: the mold was opened and the rubber sheet was placed in a drying oven and post-cured at 70 ℃ for 12 hours.
Example 7
An application of a water-swellable single-component prepolymer:
step one: the product of example 3 was placed in a spraying apparatus and sprayed uniformly at 40 ℃ onto clean, dry rubber particles in a horizontal plow-shaped stirrer;
step two: filling the mixture into a cylindrical mold with holes at the periphery according to the bulk density of about 0.6kg/L, compacting and leveling;
step three: putting the mould into a steam oven at 100 ℃ for heating for 1-2 hours;
step four: after the mold is opened, the cylindrical rubber column is put into a drying oven for post curing for 12 hours at 70 ℃;
step five: and D, rotating and cutting the rubber column in the fourth step into the floor mat with the corresponding thickness according to the requirement.
Example 8
An application of a water-swellable single-component prepolymer:
step one: the product of example 4 was placed in a spraying apparatus and sprayed uniformly at 40 ℃ onto clean, dry rubber particles in a horizontal plow-shaped stirrer;
step two: filling the mixture into a cylindrical mold with holes at the periphery according to the bulk density of about 0.6kg/L, compacting and leveling;
step three: putting the mould into a steam oven at 100 ℃ for heating for 1-2 hours;
step four: after the mold is opened, the cylindrical rubber column is put into a drying oven for post curing for 12 hours at 70 ℃;
step five: and D, rotating and cutting the rubber column in the fourth step into the floor mat with the corresponding thickness according to the requirement.
Reference example 1
A preparation method of a single-component prepolymer comprises the following steps:
step one: uniformly mixing 80 parts of polyether polyol G and 40 parts of polyether polyol H, dehydrating for 4-8 hours at the temperature of below 100 ℃ under vacuum of 5Torr until the system water content reaches below 200ppm, standing for 24 hours, and cooling to normal temperature;
step two: adding 50 parts of TDI (toluene diisocyanate) -80 parts of diluent and 30 parts of diluent into the mixed polyol obtained in the step one, uniformly stirring, heating to 70-75 ℃, reacting for 2-3 hours to obtain an intermediate product, wherein the NCO value is about 7-8%, the free TDI content is about 7-9%, and cooling to 50 ℃;
step three: dropwise adding 0.1 part of trimerization catalyst into the intermediate product obtained in the second step, controlling the temperature to be 65-70 ℃ and reacting for 5-7 hours, wherein the theoretical NCO value of the reactant is 5.5%; the nco=5.7% was found, the free TDI content was 1.51%;
step four: and (3) cooling the reactant obtained in the step (III) to 50 ℃, adding 0.1g of phosphoric acid, stirring for 0.5-1 hour, and cooling to room temperature to obtain the reactant of reference example 1.
In this example, polyether polyol G is a dipropylene glycol-initiated propylene oxide adduct having a molecular weight of about 1000. The polyether polyol H is a glycerin-initiated copolymer adduct of propylene oxide and ethylene oxide, wherein the ethylene oxide accounts for about 10% of the total substance content, and the molecular weight is about 3000.
Reference example 2
Use of a one-component prepolymer:
step one: the product of reference example 1 was prepared according to 1:6, uniformly stirring the mixture of the proportion of 6 and the clean and dry rubber particles in a stirrer;
step two: placing 500g of the mixture into a rubber floor mat mold with the volume of about 1L, and compacting and leveling;
step three: heating the die to an oven at 100 ℃ for curing for 2-6 hours;
step four: the mold was opened and the rubber sheet was put into a drying oven and post-cured at 70℃for 12 hours
Test example 1
The products prepared in examples 1 to 8, reference example 1 and reference example 2 were subjected to performance tests, and the test results are shown in Table 1:
TABLE 1
As can be seen from Table 1, the NCO content of the water-swellable one-component prepolymers prepared in examples 1 to 4 of the present invention is far higher than that of the prior art, as compared with the prior art prepolymer for plastic track material in reference example 1. Compared with the prior prepolymer in the reference example 1 applied to the plastic track material (reference example 2), the statue track material of the embodiments 5-8 is far better than the prior art in bending fracture condition, and the adhesive force is basically the same as that of the prior art, and the raw materials adopted by the invention are more environment-friendly.
The foregoing embodiments are merely examples of the present invention, and the scope of the present invention includes, but is not limited to, the forms and styles of the foregoing embodiments, and any suitable changes or modifications made by those skilled in the art, which are consistent with the claims of the present invention, shall fall within the scope of the present invention.
Claims (8)
1. An application of a water-swellable single-component prepolymer is characterized in that: the water-swellable single-component prepolymer mainly comprises polyol A and isocyanate B according to the weight ratio (25-55): (45-75), said polyol a comprising a polyether polyol C comprising hydrophilic segments and a long chain polyether polyol D; the polyether polyol C is a mixture of one or more polyethers containing ethylene oxide segments, and the ethylene oxide segment content is more than 50%; polyether polyol C is polyether with functionality less than or equal to 3 and molecular weight of 200-6000;
the content of the polyether polyol C in the polyol A is more than 50 percent;
the preparation process of the water-swellable single-component prepolymer comprises the following steps: mixing the polyol A, the isocyanate B and the solvent in proportion, reacting at 50-80 ℃ until NCO reaches a theoretical value, adding the auxiliary agent, and uniformly stirring;
the water-swellable single-component prepolymer is applied to plastic track materials and comprises the following steps: mixing the water-swellable single-component prepolymer and rubber particles according to the mass ratio of 1:1-10, filling the mixture into a mold, introducing water or steam, placing the mold into an oven for curing after the reaction is completed, and wrapping particles for the plastic track after the curing is completed.
2. The use of a water-swellable one-component prepolymer according to claim 1, wherein: the polyol A also contains hydroxyl-terminated polybutadiene with molecular weight of 600-5000 and functionality of 2.
3. Use of a water-swellable one-component prepolymer according to claim 1 or 2, characterized in that: the long-chain polyether polyol D is one or a mixture of more polyether polyols with molecular weights of 1000-6000.
4. The use of a water-swellable one-component prepolymer according to claim 3, wherein: the long-chain polyether polyol D mainly comprises polyether polyol with ethylene oxide content not exceeding 25%, and the functionality is 2-3.
5. The use of a water-swellable one-component prepolymer according to claim 2, wherein: the hydroxyl-terminated polybutadiene is liquid hydroxyl-terminated polybutadiene with molecular weight of 1500-4000; the content of the polyol A is 0-20% of the mass percentage of the polyol A.
6. The use of a water-swellable one-component prepolymer according to claim 5, wherein: the hydroxyl-terminated polybutadiene is liquid hydroxyl-terminated polybutadiene with a molecular weight of 2000-3000; the content of the polyol A is 0-5% of the mass percentage of the polyol A.
7. Use of a water-swellable one-component prepolymer according to claim 1 or 2, characterized in that: the isocyanate B is one or more of 2, 4-toluene diisocyanate, 2, 6-toluene diisocyanate, 4 '-diphenylmethane diisocyanate, 2,4' -diphenylmethane diisocyanate, 1, 6-hexamethylene diisocyanate, isophorone diisocyanate, polymethylene polyphenyl polyisocyanate and carbodiimide modified diphenylmethane diisocyanate.
8. Use of a water-swellable one-component prepolymer according to claim 1 or 2, characterized in that: the water-swellable single-component prepolymer also contains an auxiliary agent, wherein the weight ratio of the sum of the weight of the polyol A and the weight of the isocyanate B to the weight ratio of the auxiliary agent to the solvent is 100: (0-1): (0-30), wherein the auxiliary agent is a silane coupling agent; the solvent is one or more of ethyl acetate, butyl acetate, propylene glycol methyl ether acetate, ethylene glycol butyl ether acetate and solvent oil.
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| CN102408866A (en) * | 2011-10-31 | 2012-04-11 | 东莞市普赛达密封粘胶有限公司 | Preparation method of water-expandable single-component polyurethane sealant |
| CN111057207A (en) * | 2018-10-17 | 2020-04-24 | 上海浦加钻采技术有限公司 | Prepolymer of elastomer material for screw drilling tool and preparation method thereof |
| CN112409977A (en) * | 2019-08-20 | 2021-02-26 | 南亚塑胶工业股份有限公司 | Polyurethane adhesive for manufacturing plastic track and prepreg thereof |
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| ITMI20010357A1 (en) * | 2001-02-22 | 2002-08-22 | Enichem Spa | ISOCIANIC COMPOSITIONS AND THEIR USE IN THE PREPARATION OF EXPANSIPOLYURETHANE WITH IMPROVED PHYSICAL-MECHANICAL CHARACTERISTICS |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102408866A (en) * | 2011-10-31 | 2012-04-11 | 东莞市普赛达密封粘胶有限公司 | Preparation method of water-expandable single-component polyurethane sealant |
| CN111057207A (en) * | 2018-10-17 | 2020-04-24 | 上海浦加钻采技术有限公司 | Prepolymer of elastomer material for screw drilling tool and preparation method thereof |
| CN112409977A (en) * | 2019-08-20 | 2021-02-26 | 南亚塑胶工业股份有限公司 | Polyurethane adhesive for manufacturing plastic track and prepreg thereof |
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