WO2020228540A1 - 一种耐黄变的热塑性聚氨酯发泡材料及其制备方法 - Google Patents
一种耐黄变的热塑性聚氨酯发泡材料及其制备方法 Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
Definitions
- the invention belongs to the field of polymer foam materials, and specifically relates to a thermoplastic polyurethane foam material resistant to yellowing and a preparation method thereof.
- Foam material has a series of advantages such as low density, heat insulation and sound insulation, high specific strength, and cushioning. Therefore, it is widely used in the packaging industry, industry, agriculture, transportation industry, military industry, aerospace industry and daily necessities.
- Commonly used foam plastics are polyurethane (PU) soft and rigid foam, polystyrene (PS) foam, polyethylene (PE) foam, polypropylene (PP) foam and so on.
- PU polyurethane
- PS polystyrene
- PE polyethylene
- PP polypropylene
- polyurethane foam tends to retain isocyanate during the foaming process, which is harmful to the human body, and the foamed material cannot be recycled. Styrofoam products are difficult to degrade and prone to "white pollution”.
- the United Nations Environment Organization has decided to stop using PS foam products.
- Polyethylene foam has poor high temperature resistance and is not suitable for application in high temperature fields.
- Thermoplastic polyurethane elastomer has a wide range of hardness, excellent wear resistance, mechanical strength, water resistance, oil resistance, chemical resistance, mold resistance, environmental friendliness, and recyclability.
- a molded foamed product can be obtained.
- This kind of product not only retains the excellent performance of the original matrix, but also has excellent resilience, shape diversity, low density, and can be used in a wide temperature range.
- TPU foam materials have very broad application prospects in many industrial fields (automobile industry, packaging materials) and daily life fields (shoe materials, pillows, mattresses).
- Thermoplastic polyurethane foam material has been disclosed in patent documents WO2007/082838A, WO2010/136398A, CN102229709A, CN102276785A, CN103183805A, and the TPU resin raw materials used are generally synthesized from aromatic isocyanates such as MDI.
- Thermoplastic polyurethane foam material products will be exposed to long-term sunlight during outdoor use.
- the TPU resin foam material synthesized from MDI and other aromatic isocyanates will have the diurethane bridge structure of the aromatic ring under the action of ultraviolet rays. Automatically oxidize to quinone-imine bond or azo compound, accompanied by yellowing of the product and decrease of mechanical properties.
- the existing patented technology is to increase the anti-yellowing performance of the material by adding a large amount of UV resistant additives to the thermoplastic polyurethane resin raw materials, but the existing technology still has the following defects: (1) The addition of anti-UV additives cannot The fact that the nature of TPU yellowing is solved at the source is a problem, and with the prolonged use of the product, the effect of anti-UV additives will gradually decrease, and ultimately lead to a greatly reduced product performance and shortened service life. (2) Anti-UV additives are usually added in the process of preparing thermoplastic polyurethane materials or subsequent modified thermoplastic polyurethane materials, especially for industries that require high yellowing resistance, such as the field of shoe materials, which require a large amount of anti-UV additives.
- thermoplastic polyurethane foam material with excellent yellowing resistance is a problem to be solved urgently.
- the present invention provides a yellowing-resistant thermoplastic polyurethane foam material and a preparation method thereof.
- the prepared yellowing-resistant thermoplastic polyurethane foam material has excellent yellowing resistance and controllable foaming density.
- the cell size is uniform.
- thermoplastic polyurethane foam material resistant to yellowing comprising the reaction of aliphatic diisocyanate, chain extender, polyol, antioxidant, UV absorber and UV light stabilizer
- the prepared thermoplastic polyurethane elastomer has a softening point of 90-160°C, preferably 95-150°C, particularly preferably 100-150°C, and a Shore hardness of 40A-98A, preferably 60-90A, especially Preferably 75-88A, the melt index is 5-250g/10min.
- the foaming material prepared by the present invention has a yellowing resistance grade of 5 under a 300h long-term accelerated test, no yellowing, very good yellowing resistance, and its yellowing resistance is significantly better than the current traditional thermoplastic polyurethane foam materials , And can obtain foam materials with a density of 0.05-0.5g/cm 3 , the foaming density is controllable, the cell size is uniform, and it has good resilience and mechanical strength properties. Because the aliphatic thermoplastic polyurethane is exposed to long-term light Under the environment, the carbamate bridge structure will not automatically oxidize to quinone-imine bonds or yellowing of azo compounds, which can improve the yellowing resistance.
- the present invention can also be improved as follows.
- the aliphatic diisocyanate includes hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), xylylene diisocyanate (XDI) or hydrogenated phenylmethane diisocyanate (H 12 MDI) ), a mixture of one or more of cyclohexyl dimethyl diisocyanate (H 6 XDI), and cyclohexyl diisocyanate.
- HDI hexamethylene diisocyanate
- IPDI isophorone diisocyanate
- XDI xylylene diisocyanate
- H 12 MDI hydrogenated phenylmethane diisocyanate
- H 6 XDI cyclohexyl dimethyl diisocyanate
- cyclohexyl diisocyanate cyclohexyl diisocyanate
- the beneficial effect of adopting the above-mentioned further solution is that the above-mentioned raw materials are selected to make the foam material have better yellowing resistance.
- the chain extender includes one or more mixtures of 1,2-ethylene glycol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol, and cyclohexanedimethanol .
- the beneficial effect of adopting the above-mentioned further solution is: selecting the above-mentioned raw materials as the chain extender can improve the mechanical properties of the yellowing-resistant thermoplastic polyurethane foam material.
- the amount of the antioxidant is 0-0.3% of the total amount of the thermoplastic polyurethane elastomer, and the antioxidant is a hindered phenol antioxidant or a phosphite antioxidant.
- the amount of the UV absorber is 0.5-1.5% of the total amount of the thermoplastic polyurethane elastomer, and the UV absorber is a benzotriazole type ultraviolet absorber, a formamidine type ultraviolet absorber, and a triazine type ultraviolet Absorbent or benzophenone ultraviolet absorber;
- the amount of the UV light stabilizer is 0.5-4% of the total amount of the thermoplastic polyurethane elastomer, and the UV light stabilizer is a hindered amine light stabilizer.
- the beneficial effect of adopting the above-mentioned further solution is to further improve the yellowing resistance effect.
- polyol is one or more mixtures of polycarbonate polyol, polycaprolactone polyol, or polyether polyol with a functionality of 1.9-2.1.
- the beneficial effect of adopting the above-mentioned further solution is that the resilience of the made thermoplastic polyurethane foam material can be improved.
- the present invention also provides a method for preparing a yellowing-resistant thermoplastic polyurethane foam material, which includes a thermoplastic polyurethane elastomer.
- the thermoplastic polyurethane elastomer is subjected to a physical foaming process to obtain a yellowing-resistant thermoplastic polyurethane foam material.
- the density of the thermoplastic polyurethane foam material is 0.05-0.5g/cm 3 , and the cell size is 10-200um.
- the beneficial effect of the preparation method of the yellowing-resistant thermoplastic polyurethane foam material of the present invention is that the preparation method can maintain the thermoplastic polyurethane foam material made of thermoplastic polyurethane elastomer foam to have good mechanical properties.
- the physical foaming process is preferably carried out in the following manner: including taking 100 parts by weight of the thermoplastic polyurethane elastomer, 1-60 parts by weight of the physical foaming agent and 100-500 parts by weight of water, and adding them to the pressure-resistant container Stir to form a suspension, then heat to 80-160°C, keep the pressure at 10-250bar, constant temperature and pressure for 0-180 minutes, and finally discharge the suspension in the pressure vessel into the atmosphere to obtain a yellowing-resistant thermoplastic polyurethane hair ⁇ .
- the beneficial effect of adopting the above-mentioned further solution is that the premix is used to heat up and control the pressure to realize rapid foaming, and the foamed thermoplastic polyurethane foam material has good tensile strength and resilience.
- the physical foaming process can also be carried out in the following manner: including taking 100 parts by weight of the thermoplastic polyurethane elastomer into the extruder to melt, and then injecting the physical foaming agent at the end of the extruder, and the control pressure is 10- 250bar, control the extruder die temperature to 80-180°C, die pressure 10-150bar, and finally extrude through the die to obtain a yellowing-resistant thermoplastic polyurethane foam material.
- thermoplastic polyurethane elastomer can be realized by an extruder, which can be directly made into foamed particles or foamed plates, and the application range is wider.
- the physical foaming process includes taking 100 parts by weight of the thermoplastic polyurethane elastomer into a pressure-resistant container, and injecting 1-100 parts by weight of a physical foaming agent into the pressure-resistant container to achieve a pressure of 10-350 bar, The pressure is maintained for 1-48h to make the physical blowing agent reach a dissolution equilibrium in the thermoplastic polyurethane elastomer, and then the dissolving equilibrium material is heated and foamed in a temperature environment of 100-140°C to obtain a thermoplastic polyurethane foam material resistant to yellowing .
- the beneficial effect of adopting the above-mentioned further solution is that the foaming is performed after pressurization first, so that the foaming agent can completely enter the thermoplastic polyurethane elastomer, the foaming effect is better, and the resilience is better.
- the physical blowing agent includes one or a mixture of nitrogen, carbon dioxide, air, methane, propane, butane or pentane.
- the beneficial effect of adopting the above further scheme is that the foaming effect is better.
- the present invention also provides the application of the above-mentioned thermoplastic polyurethane foam material in the elastic foam field, which is particularly suitable for shoe materials, floor coverings, vehicle parts, toys and the like.
- a yellowing resistant thermoplastic polyurethane foaming material includes a thermoplastic polyurethane elastomer prepared by the reaction of aliphatic diisocyanate, chain extender, polyol, antioxidant, UV absorber and UV light stabilizer.
- thermoplastic polyurethane elastomers it is prepared by the following method: using an aliphatic diisocyanate, a polyol with a molar mass of 500-10000 g/mol and a chain extender with a molar mass of 50-500 g/mol to mix, using an extrusion reaction type extruder, A one-pot method or a prepolymer method is used to react at 150-200°C to produce thermoplastic polyurethane elastomers.
- the adjustment index of each component in the above reaction for preparing the thermoplastic polyurethane elastomer is 80-110; the specific index is: the number of moles of isocyanate groups in the aliphatic diisocyanate and the isocyanate group in the chain extender and polyol Ratio of moles of reactive groups.
- the softening point of the thermoplastic polyurethane elastomer is 90-160°C, which is measured by Shimadzu CFT-500 series rheometer; the Shore hardness is 40A-98A, and the hardness is measured by the Shore A type durometer; the melt index It is 5-250g/10min.
- the melt index is obtained by applying 5kg load test at 210°C;
- the yellowing resistance grade of the foam material is 4.5-5 grade, which adopts 340nm UVA lamp according to ASDM-D1148, and the lamp irradiation intensity is 0.77 W/m2/nm or HG/T3689-2001A method in 300h irradiation test, according to ISO 105-A02: 1993, the yellowing resistance grade is assessed under the standard light source D65, grade 5 means that the material has not turned yellow, grade 4.5 means The material has only a slight yellowing. Grade 1 means that the yellowing of the material is very serious.
- the aliphatic diisocyanate is hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), xylylene diisocyanate (XDI) or hydrogenated phenylmethane diisocyanate (H 12 MDI), cyclohexyl dimethylene diisocyanate (H 6 XDI), cyclohexyl diisocyanate;
- HDI hexamethylene diisocyanate
- IPDI isophorone diisocyanate
- XDI xylylene diisocyanate
- H 12 MDI hydrogenated phenylmethane diisocyanate
- H 6 XDI cyclohexyl dimethylene diisocyanate
- cyclohexyl diisocyanate cyclohexyl diisocyanate
- the chain extender includes an aliphatic, aromatic or alicyclic diol compound with a molar mass of 50-500 g/mol; specifically, the chain extender is 1,2-ethane with 2-14 C atoms Alcohol, 1,3-propanediol, 1,4-butanediol, 1,6-hexanediol or cyclohexanedimethanol, or the chain extender is 2-hydroxyethyl ether, m-phenylene glycol bis(hydroxyethyl Base) ether or 1,4-dimethylolcyclohexane;
- the chain extender is 1,4-butanediol.
- the amount of the antioxidant is 0-0.3% of the total amount, the preferred amount of the antioxidant is 0-0.1% of the total amount, and the antioxidant is hindered phenolic antioxidant or phosphite Antioxidant, the specific brand is Irganox 1010, Irganox 1076, Irganox 1098, Irganox 3114, Irganox 126, Irgafos 168 or Irgafos 618 of BASF (BASF); the amount of the UV absorber is 0.5-1.5 of the total amount of the thermoplastic polyurethane elastomer %, the preferred amount of UV absorber is 0.8-1.5% of the total amount of the thermoplastic polyurethane elastomer.
- the specific brand is Irganox 1010, Irganox 1076, Irganox 1098, Irganox 3114, Irganox 126, Irgafos 168 or Irgafos 618 of BASF
- the UV absorber is benzotriazole ultraviolet absorber, formamidine ultraviolet absorber, triazine ultraviolet absorber Or benzophenone ultraviolet absorber, the specific brand is BASF's TinuvinP, Tinuvin327, Tinuvin328, Tinuvin329, Tinuvin234, Tinuvin312, TinuvinUV-1 or TinuvinUV-3; the amount of UV light stabilizer accounts for the elastic 0.5-4% of the total amount of the body, preferably the amount of UV light stabilizer is 1-3% of the total amount.
- the UV light stabilizer is a hindered amine light stabilizer, and the specific brands are Tinuvin571, Tinuvin770, Tinuvin622, Tinuvin944 Or Tinuvin144;
- the polyol is one or more mixtures of polycarbonate polyol, polyester polyol or polyether polyol with a functionality of 1.9-2.1, and the molar mass of the polyester polyol is 800-1200 g/mol, The molar mass of polyether polyol is 500-2000g/mol;
- the polyol is a polyether polyol with a functionality of 2.
- the specific polyether polyol can be polyethylene adipate diol (PEA), poly diethylene adipate diol (PDA), polybutylene adipate glycol (PBA), polypropylene adipate glycol (PPA), polyoxypropylene glycol, polytetrahydrofuran polyol (PTMEG); preferably polyadipate A mixture of butanediol ester diol (PBA) and polytetrahydrofuran polyol (PTMEG).
- a method for preparing yellowing-resistant thermoplastic polyurethane foam material comprising 30 kg of hexamethylene diisocyanate, 11 kg of 1,4-butanediol, 100 kg of polybutylene adipate diol and polytetrahydrofuran
- a mixture of polyols in a mass ratio of 1:1, hindered phenol antioxidants, benzotriazole ultraviolet absorbers and hindered amine light stabilizers are put into the twin-screw reaction extruder at 150-180°C
- the specific brand of the benzotriazole ultraviolet absorber is TinuvinP, the specific amount of which is 0.5% of the total amount, and the amount of hindered amine light stabilizer is 0.5% of the total amount.
- the specific grade is Tinuvin571, the softening point of the thermoplastic polyurethane elastomer particles is 90°C, the Shore hardness is 40A, and the melt index is 250g/10min;
- thermoplastic polyurethane foam material has a density of 0.05 g/cm 3 and a cell size of 10-40um ;
- thermoplastic polyurethane foam material obtained above is filled into a mold with a length of 300 mm * a width of 250 mm * a thickness of 50 mm. Use 2bar water vapor to compress 10% along the thickness direction of the mold to bond and shape the thermoplastic polyurethane foam material, and finally obtain a molded foam product.
- the obtained foam product was placed at 50°C*50%RH (humidity) for 2 hours, dried in a constant temperature room at 80°C for 2 hours, and finally placed at 25°C*50%RH for 2 hours to evaluate its performance.
- a method for preparing a yellowing-resistant thermoplastic polyurethane foam material comprising 70 kg of isophorone diisocyanate, 15 kg of 1,4-butanediol, 100 kg of polytetrahydrofuran polyol, hindered phenol antioxidant, benzo Triazole ultraviolet absorber and hindered amine light stabilizer are put into a twin-screw extruder and reacted at 150-200°C.
- the specific brand of hindered phenol antioxidant is antioxidant Irganox 1010, and the specific amount accounts for its total amount.
- the specific brand of benzotriazole ultraviolet absorber is Tinuvin327
- the specific dosage is 0.8% of the total amount
- the amount of hindered amine light stabilizer is 1% of the total
- the specific brand is Tinuvin770
- thermoplastic The softening point of polyurethane elastomer particles is 160°C, the Shore hardness is 98A, and the melt index is 5g/10min;
- thermoplastic polyurethane foaming material has a density of 0.5g/cm3 and a cell size 70-100um;
- thermoplastic polyurethane foam material obtained above is filled into a mold with a length of 300 mm * a width of 250 mm * a thickness of 50 mm. Use 2bar water vapor to compress 10% along the thickness direction of the mold to bond and shape the thermoplastic polyurethane foam material, and finally obtain a molded foam product. After the obtained foam product was placed at 50°C*50%RH for 2 hours, it was dried in a constant temperature room at 80°C for 2 hours, and finally placed at 25°C*50%RH for 2 hours to evaluate its performance.
- thermoplastic polyurethane elastomer consisting of 51kg of hydrogenated xylylene diisocyanate, 12kg of 1,4-butanediol, and 100kg of polybutylene adipate
- Diol, hindered phenol antioxidant, benzotriazole ultraviolet absorber and hindered amine light stabilizer are put into twin-screw extruder and reacted at 150-200°C.
- the specific grade of hindered phenol antioxidant is antioxidant.
- Oxygen agent Irganox 1076 the specific dosage accounts for 0.1% of the total
- the specific brand of benzotriazole ultraviolet absorber is Tinuvin 312
- the specific dosage accounts for 1% of the total amount
- the amount of hindered amine light stabilizer accounts for the total amount.
- the specific grade is Tinuvin622
- the softening point of the thermoplastic polyurethane elastomer particles is 125°C
- the Shore hardness 85A
- the melt index is 100g/10min;
- thermoplastic polyurethane foam material had a density of 0.15 g/cm3 and a cell size 100-120um;
- thermoplastic polyurethane foam material obtained above is filled into a mold with a length of 300 mm * a width of 250 mm * a thickness of 50 mm. Use 2bar water vapor to compress 10% along the thickness direction of the mold to bond and shape the thermoplastic polyurethane foam material, and finally obtain a molded foam product. After the obtained foam product was placed at 50°C*50%RH for 2 hours, it was dried in a constant temperature room at 80°C for 2 hours, and finally placed at 25°C*50%RH for 2 hours to evaluate its performance.
- thermoplastic polyurethane elastomer consisting of 45kg of hydrogenated diphenylmethane diisocyanate, 10g of 1,4-butanediol, 100kg of polytetrahydrofuran polyol, hindered phenols Antioxidant, benzotriazole ultraviolet absorber and hindered amine light stabilizer are put into twin-screw extruder and reacted at 150-200°C.
- the specific grade of hindered phenol antioxidant is antioxidant Irganox 1098, and the specific dosage is It accounts for 0.1% of the total amount.
- the specific brand of benzotriazole ultraviolet absorber is TinuvinUV-1, and the specific amount is 1.5% of the total amount.
- the amount of hindered amine light stabilizer is 3% of the total amount.
- the specific grade is Tinuvin944, the softening point of the thermoplastic polyurethane elastomer particles is 145°C, the Shore hardness is 80A, and the melt index is 50g/10min;
- thermoplastic polyurethane elastomer Take 100 parts by weight of the above-mentioned thermoplastic polyurethane elastomer into a twin-screw extruder to melt, control the screw temperature to 100-180°C, and then inject 50 parts by weight of nitrogen through a booster pump at the end of the extruder to control the extruder
- the temperature of the die head is 100°C
- the pressure of the die head is 100 bar
- extruded and foamed through the die head and then cut under water to obtain the yellowing-resistant thermoplastic polyurethane foam material particles
- the density of the thermoplastic polyurethane foam material is 0.25 g/cm3, the cell size is 70-100um;
- thermoplastic polyurethane foam material obtained above is filled into a mold with a length of 300 mm * a width of 250 mm * a thickness of 50 mm. Use 2bar water vapor to compress 10% along the thickness direction of the mold to bond and shape the thermoplastic polyurethane foam material, and finally obtain a molded foam product. After the obtained foam product was placed at 50°C*50%RH for 2 hours, it was dried in a constant temperature room at 80°C for 2 hours, and finally placed at 25°C*50%RH for 2 hours to evaluate its performance.
- thermoplastic polyurethane elastomer consisting of 65kg of hydrogenated diphenylmethane diisocyanate, 12kg of 1,4-butanediol, 100kg of polytetrahydrofuran polyol and hindered phenols
- Antioxidant, benzotriazole ultraviolet absorber and hindered amine light stabilizer are put into twin-screw extruder and reacted at 150-200°C.
- the specific grade of hindered phenol antioxidant is antioxidant Irgafos168, and the specific dosage It accounts for 0.3% of the total.
- the specific brand of benzotriazole ultraviolet absorber is TinuvinUV-3, and the specific dosage is 1.2% of the total amount.
- the amount of hindered amine light stabilizer is 4% of the total.
- the specific grade is Tinuvin144, the softening point of the thermoplastic polyurethane elastomer particles is 110°C, the Shore hardness is 90A, and the melt index is 20g/10min;
- thermoplastic polyurethane elastomer Take 100 parts by weight of the above-mentioned thermoplastic polyurethane elastomer into a twin-screw extruder to melt, control the screw temperature to 100-180°C, and then inject 30 parts by weight of carbon dioxide through a booster pump at the end of the extruder to control the extruder
- the temperature of the die head is 100°C
- the pressure of the die head is 80 bar
- extruded and foamed through the die head and then cut under water to obtain the yellowing-resistant thermoplastic polyurethane foamed plate material particles, the thickness is 20mm
- thermoplastic polyurethane The density of the foam material is 0.25g/cm3, and the cell size is 100-120um;
- thermoplastic polyurethane elastomer consisting of 55kg of isophorone diisocyanate, 15kg of 1,4-butanediol, 100kg of polytetrahydrofuran polyol, and hindered phenolic antioxidant , Benzotriazole ultraviolet absorber and hindered amine light stabilizer are put into twin-screw extruder and reacted at 150-200°C.
- the specific brand of hindered phenol antioxidant is antioxidant Irgafos618, and the specific amount accounts for it. 0.15% of the total amount.
- the specific brand of benzotriazole ultraviolet absorber is Tinuvin234, and the specific amount is 1.5% of the total amount.
- the amount of hindered amine light stabilizer is 2.5% of the total amount.
- the specific brand is Tinuvin571, the softening point of the thermoplastic polyurethane elastomer particles is 155°C, the Shore hardness is 88A, and the melt index is 40g/10min;
- thermoplastic polyurethane elastomer Take 100 parts by weight of the above-mentioned thermoplastic polyurethane elastomer and put it into a 200L pressure-resistant container, and inject 100 parts by weight of nitrogen into the pressure-resistant container, so that the pressure of the pressure-resistant container reaches 150bar, and the pressure is maintained for 48h, so that the nitrogen is elastic in the thermoplastic polyurethane.
- the inside of the body reaches the dissolution equilibrium, and the physical foaming agent penetrates into the thermoplastic polyurethane elastomer.
- the dissolution equilibrium means that the physical foaming agent is dispersed evenly after entering the thermoplastic polyurethane elastomer, and then the dissolved and balanced materials are placed in 140 °C water
- the steam is heated to foam the thermoplastic polyurethane elastomer to obtain yellowing-resistant thermoplastic polyurethane foam material particles, the thermoplastic polyurethane foam material has a density of 0.22g/cm3 and a cell size of 30-60um;
- thermoplastic polyurethane foam material obtained above is filled into a mold with a length of 300 mm * a width of 250 mm * a thickness of 50 mm. Use 2bar water vapor to compress 10% along the thickness direction of the mold to bond and shape the thermoplastic polyurethane foam material, and finally obtain a molded foam product. After the obtained foam product was placed at 50°C*50%RH for 2 hours, it was dried in a constant temperature room at 80°C for 2 hours, and finally placed at 25°C*50%RH for 2 hours to evaluate its performance.
- thermoplastic polyurethane foamed foam products prepared according to Examples 1-6 have a resistance to yellowing under the 300h accelerated test.
- the grade is 4.5-5, the yellowing resistance is very good, which is significantly better than the foam products made of thermoplastic polyurethane foam materials on the market, and the foam products made of thermoplastic polyurethane foam also have good resilience and mechanical strength performance.
Abstract
Description
Claims (11)
- 一种耐黄变的热塑性聚氨酯发泡材料,其特征在于,包括由脂肪族二异氰酸酯、扩链剂、多元醇、抗氧剂、UV吸收剂和UV光稳定剂反应制得的热塑性聚氨酯弹性体,所述热塑性聚氨酯弹性体的软化点为90-160℃,邵氏硬度为40A-98A,熔融指数为5-250g/10min。
- 根据权利要求1所述的一种耐黄变的热塑性聚氨酯发泡材料,其特征在于,所述脂肪族二异氰酸酯包括六亚甲基二异氰酸酯(HDI)、异佛尔酮二异氰酸酯(IPDI)、苯二亚甲基二异氰酸酯(XDI)或氢化二苯基甲烷二异氰酸酯(H 12MDI)、环己基二亚甲基二异氰酸酯(H 6XDI)、环己基二异氰酸酯中的一种或多种的混合物。
- 根据权利要求1所述的一种耐黄变的热塑性聚氨酯发泡材料,其特征在于,所述扩链剂包括1,2-乙二醇、1,3-丙二醇、1,4-丁二醇、1,6-己二醇和环己烷二甲醇中的一种或多种混合物。
- 根据权利要求1所述的一种耐黄变的热塑性聚氨酯发泡材料,其特征在于,所述抗氧剂用量为占所述热塑性聚氨酯弹性体总量的0-0.3%,所述抗氧剂为受阻酚类抗氧化剂或亚磷酸酯类抗氧剂;所述UV吸收剂用量为占所述热塑新聚氨酯弹性体总量的0.5-1.5%,所述UV吸收剂为苯并三唑类紫外线吸收剂、甲脒类紫外线吸收剂、三嗪类紫外线吸收剂或苯甲酮类紫外线吸收剂;所述UV光稳定剂用量为占所述热塑性聚氨酯弹性体总量的0.5-4%,所述UV光稳定剂为受阻胺类光稳定剂。
- 根据权利要求1所述的一种耐黄变的热塑性聚氨酯发泡材料,其特征在于,所述多元醇包括官能度为1.9-2.1的聚碳酸酯多元醇、聚酯多元醇或聚醚多元醇中的一种或多种混合物。
- 一种耐黄变的热塑性聚氨酯发泡材料制备方法,其特征在于,包括 将热塑性聚氨酯弹性体,经过物理发泡工艺得到耐黄变的热塑性聚氨酯发泡材料。
- 根据权利要求6所述的一种耐黄变的热塑性聚氨酯发泡材料制备方法,其特征在于,所述物理发泡工艺包括将热塑性聚氨酯弹性体,物理发泡剂和水,加入到耐压容器中搅拌形成悬浮液,然后升温,保持压力为10-250bar,最后将压力容器内的悬浮液排放到大气环境中得到耐黄变的热塑性聚氨酯发泡材料。
- 根据权利要求6所述的一种耐黄变的热塑性聚氨酯发泡材料制备方法,其特征在于,所述物理发泡工艺包括将热塑性聚氨酯弹性体投入挤出机中熔融,然后在挤出机注入物理发泡剂,控制压力为20-300bar,最后通过模头挤出得到耐黄变的热塑性聚氨酯发泡材料。
- 根据权利要求6所述的一种耐黄变的热塑性聚氨酯发泡材料制备方法,其特征在于,所述物理发泡工艺包括将热塑性聚氨酯弹性体投入到耐压容器中,并注入物理发泡剂到耐压容器中,使压力达到10-350bar,压力维持1-48h,然后将物料加热,得到耐黄变的热塑性聚氨酯发泡材料。
- 根据权利要求7-9任一项所述的一种耐黄变的热塑性聚氨酯发泡材料制备方法,其特征在于,所述物理发泡剂包括氮气、二氧化碳、空气、甲烷、丙烷、丁烷和戊烷中的一种或几种混合物。
- 一种如权利要求1所述的热塑性聚氨酯发泡材料在弹性泡沫领域中的应用,特别适用于鞋材,地面覆盖物,交通工具部件,玩具等。
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EP20805765.3A EP3950842A4 (en) | 2019-05-16 | 2020-04-29 | NON-YELLOWING THERMOPLASTIC POLYURETHANE FOAM MATERIAL AND METHOD OF MANUFACTURE THEREOF |
KR1020217035828A KR20210151127A (ko) | 2019-05-16 | 2020-04-29 | 내황변 열가소성 폴리우레탄 발포재료 및 이의 제조 방법 |
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JP7361415B2 (ja) | 2023-10-16 |
JP2022533060A (ja) | 2022-07-21 |
BR112021022846A2 (pt) | 2022-03-22 |
CN110183843A (zh) | 2019-08-30 |
KR20210151127A (ko) | 2021-12-13 |
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