High-strength polyurethane foam material and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, and provides a high-strength polyurethane foam material and a preparation method thereof.The high-strength polyurethane foam material is prepared from, by weight, 50-70 parts of polyether polyol, 50-75 parts of isocyanate, 1-4 parts of neutral water, 6-12 parts of filler, 1-2 parts of catalyst, 1-1.5 parts of foam stabilizer, 2-4 parts of chain extender and 0.5-1.5 parts of antioxidant; the filler comprises zirconium silicate and barium strontium titanate in a mass ratio of (1: 9)-(9: 1). According to the technical scheme, the problems of poor strength and wear resistance of the polyurethane foaming material in related technologies are solved.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, and in particular to a high-strength polyurethane foam material and a preparation method thereof. Background Art

[0002] As a high-performance polymer material, polyurethane foam material has the characteristics of light weight, heat insulation, sound absorption, and cushioning. It has been widely used in the fields of construction, transportation, packaging, furniture, etc. With the continuous advancement of science and technology and the increasing demand for environmentally friendly, energy-saving, and high-performance materials, the research on polyurethane foam materials is also deepening. There are still many problems with the existing polyurethane foam materials, such as: physical foaming agents will occupy a certain space and form bubbles during the foaming process. However, the foam cell structure is too large and uneven, and it is easy to collapse, which leads to a decrease in the strength of the polyurethane foam material. In addition, the polyurethane foam material is not wear-resistant, which limits the application of polyurethane foam materials in various fields.

[0003] Therefore, it is necessary to obtain a polyurethane foam material with high strength and excellent wear resistance to promote the development of polyurethane foam materials and broaden their application fields. Summary of the invention

[0004] The invention provides a high-strength polyurethane foam material and a preparation method thereof, which solves the problem of poor strength and wear resistance of the polyurethane foam material in the related art.

[0005] The technical solution of the present invention is as follows: The invention provides a high-strength polyurethane foam material, comprising the following components in parts by weight: 50-70 parts of polyether polyol, 50-75 parts of isocyanate, 1-4 parts of neutral water, 6-12 parts of filler, 1-2 parts of catalyst, 1-1.5 parts of foam stabilizer, 2-4 parts of chain extender, and 0.5-1.5 parts of antioxidant; The filler includes zirconium silicate and barium strontium titanate in a mass ratio of 1:9 to 9:1.

[0006] As a further technical solution, the mass ratio of the zirconium silicate to the barium strontium titanate is 5:3~5.

[0007] In the present invention, zirconium silicate and barium strontium titanate are added as fillers in the polyurethane foam material, and the mass ratio of zirconium silicate to barium strontium titanate is 5:3-5, thereby further improving the strength and wear resistance of the polyurethane foam material.

[0008] As a further technical solution, the catalyst includes an amine catalyst and / or a tin catalyst; The chain extender includes one or two of diols and diamines; The antioxidant includes one or two of a hindered phenol antioxidant and a phosphite antioxidant; The foam stabilizer is water-soluble polysiloxane.

[0009] As a further technical solution, the filler is an imidazole ethanol modified filler.

[0010] As a further technical solution, the preparation method of the imidazoleethanol modified filler comprises the following steps: dissolving imidazoleethanol and mixing with zirconium silicate and barium strontium titanate, and drying to obtain the imidazoleethanol modified filler.

[0011] As a further technical solution, the mass ratio of imidazole ethanol to zirconium silicate is 1:7~9.

[0012] As a further technical solution, the mixing temperature is 35-45°C and the mixing time is 40-60 minutes; The solvent used for dissolving includes ethanol, and the mass volume ratio of the imidazole ethanol to the solvent is 1 g:80-90 mL.

[0013] In the present invention, imidazole ethanol is used to carry out surface coating modification on zirconium silicate and barium strontium titanate, so as to promote the dispersion of fillers and further improve the strength and wear resistance of the polyurethane foam material.

[0014] As a further technical solution, the particle size of the zirconium silicate is 1-3 μm; and the particle size of the barium strontium titanate is 3-6 μm.

[0015] The present invention also provides a method for preparing the high-strength polyurethane foam material, comprising the following steps: S1, mixing the components except isocyanate to obtain a mixture; S2, mixing the mixture with isocyanate, and foaming and molding to obtain a high-strength polyurethane foam material.

[0016] As a further technical solution, in step S1, the mixing time is 25-35s, and the rotation speed is 1000-1500r / min; In step S2, the mixing time is 6-12 s, and the rotation speed is 2000-2500 r / min.

[0017] The working principle and beneficial effects of the present invention are: In the present invention, zirconium silicate and barium strontium titanate are added as fillers in the polyurethane foam material, and the two work together to significantly improve the strength and wear resistance of the polyurethane foam material.

[0018] Neutral water is used as the foaming agent of polyurethane foam material. Compared with other chemical foaming agents, neutral water foaming is not only green and environmentally friendly, but also has uniform foam and high stability. After mixing with other components, the obtained polyurethane foam material has excellent strength. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the following examples and comparative examples, the neutral water is deionized water.

[0021] Example 1 The high-strength polyurethane foam material comprises the following components in parts by weight: 50 parts of polyether polyol (model Dow 4071), 50 parts of diphenylmethane diisocyanate, 1 part of neutral water, 6 parts of filler, 1 part of triethylenediamine, 1 part of foam stabilizer (model L580), 2 parts of 1,4-butanediol, and 0.5 parts of antioxidant 1010; The filler is zirconium silicate and barium strontium titanate in a mass ratio of 1:9; The particle size of zirconium silicate is 3 μm, and the particle size of barium strontium titanate is 3 μm; The preparation method of high-strength polyurethane foam material comprises the following steps: S1. Mixing the components except diphenylmethane diisocyanate at 1000 r / min for 35 s to obtain a mixture; S2. Mix the mixture with diphenylmethane diisocyanate at 2500 r / min for 6 seconds, and perform foaming to obtain a high-strength polyurethane foam material.

[0022] Example 2 The high-strength polyurethane foam material comprises the following components in parts by weight: 70 parts of polyether polyol (model Dow 4071), 75 parts of diphenylmethane diisocyanate, 4 parts of neutral water, 12 parts of filler, 2 parts of dibutyltin dilaurate, 1.5 parts of foam stabilizer (model L580), 4 parts of 1,4-butanediol, and 1.5 parts of antioxidant 1010; The filler is zirconium silicate and barium strontium titanate in a mass ratio of 9:1; The particle size of zirconium silicate is 1 μm, and the particle size of barium strontium titanate is 6 μm; The preparation method of high-strength polyurethane foam material comprises the following steps: S1. Mixing the components except diphenylmethane diisocyanate at 1500 r / min for 25 s to obtain a mixture; S2. Mix the mixture with diphenylmethane diisocyanate at 2000 r / min for 12 seconds, and perform foaming to obtain a high-strength polyurethane foam material.

[0023] Example 3 The high-strength polyurethane foam material comprises the following components in parts by weight: 65 parts of polyether polyol (model Dow 4071), 60 parts of diphenylmethane diisocyanate, 4 parts of neutral water, 10 parts of filler, 1.5 parts of dibutyltin dilaurate, 1.5 parts of foam stabilizer (model L580), 3 parts of 1,4-butanediol, and 1 part of antioxidant 1010; The filler is zirconium silicate and barium strontium titanate in a mass ratio of 5:2; The particle size of zirconium silicate is 3 μm, and the particle size of barium strontium titanate is 5 μm; The preparation method of high-strength polyurethane foam material comprises the following steps: S1. Mixing the components except diphenylmethane diisocyanate at 1500 r / min for 25 s to obtain a mixture; S2. Mix the mixture with diphenylmethane diisocyanate at 2500 r / min for 10 seconds, and perform foaming to obtain a high-strength polyurethane foam material.

[0024] Example 4 The only difference between this embodiment and embodiment 3 is that the filler is zirconium silicate and barium strontium titanate in a mass ratio of 5:6.

[0025] Example 5 The only difference between this embodiment and embodiment 3 is that the filler is zirconium silicate and barium strontium titanate in a mass ratio of 1:1.

[0026] Example 6 The only difference between this embodiment and embodiment 3 is that the filler is zirconium silicate and barium strontium titanate in a mass ratio of 5:3.

[0027] Example 7 The difference between this embodiment and embodiment 6 is that the filler is an imidazole ethanol modified filler; The preparation method of imidazole ethanol modified filler comprises the following steps: dissolving 1g of imidazole ethanol in 80mL of ethanol with a volume fraction of 70%, adding 7g of zirconium silicate and 4.2g of barium strontium titanate, mixing at 35°C for 60min, and drying to obtain the imidazole ethanol modified filler.

[0028] Example 8 The difference between this embodiment and embodiment 6 is that the filler is an imidazole ethanol modified filler; The preparation method of imidazole ethanol modified filler comprises the following steps: dissolving 1g of imidazole ethanol in 90mL of ethanol with a volume fraction of 70%, adding 9g of zirconium silicate and 5.4g of barium strontium titanate, mixing at 45°C for 40min, and drying to obtain the imidazole ethanol modified filler.

[0029] Comparative Example 1 The only difference between this comparative example and Example 3 is that the filler is zirconium silicate.

[0030] Comparative Example 2 The only difference between this comparative example and Example 3 is that the filler is barium strontium titanate.

[0031] The strength and wear resistance tests were performed on the high-strength polyurethane foam materials prepared in Examples 1 to 8 and Comparative Examples 1 to 2 respectively: Strength: tensile strength test is carried out in accordance with the standard GB / T 24451-2020 "Slow Rebound Soft Polyurethane Foam Plastics"; Wear resistance: Wear test is carried out according to the standard GB / T 1689-2014 "Determination of wear resistance of vulcanized rubber (using Akron abrasion tester)"; The results are shown in Table 1 below.

[0032] Table 1 Test results of high-strength polyurethane foam material properties

[0033] By comparing the data of Examples 1 to 8 and Comparative Examples 1 to 2, it is found that compared with Comparative Examples 1 to 2, the polyurethane foam materials prepared in Examples 1 to 8 have higher strength and lower wear, indicating that the addition of zirconium silicate and barium strontium titanate as fillers in the polyurethane foam material synergistically significantly improves the strength and wear resistance of the polyurethane foam material.

[0034] By comparing the data of Examples 3 to 6, it is found that compared with Examples 3 to 4, the polyurethane foam materials prepared in Examples 5 to 6 have higher strength and lower wear, indicating that zirconium silicate and barium strontium titanate are added as fillers in the polyurethane foam material, and the mass ratio of zirconium silicate to barium strontium titanate is 5:3 to 5, which further improves the strength and wear resistance of the polyurethane foam material.

[0035] By comparing the data of Examples 6 to 8, it is found that compared with Example 6, the polyurethane foam materials prepared in Examples 7 to 8 have higher strength and lower wear, indicating that the surface coating modification of zirconium silicate and barium strontium titanate using imidazole ethanol promotes the dispersion of fillers and further improves the strength and wear resistance of the polyurethane foam material.

[0036] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength polyurethane foam material, characterized in that: The invention comprises the following components in parts by weight: 50-70 parts of polyether polyol, 50-75 parts of isocyanate, 1-4 parts of neutral water, 6-12 parts of filler, 1-2 parts of catalyst, 1-1.5 parts of foam stabilizer, 2-4 parts of chain extender, and 0.5-1.5 parts of antioxidant; The filler includes zirconium silicate and barium strontium titanate in a mass ratio of 1:9 to 9:

1.

2. A high-strength polyurethane foam material according to claim 1, characterized in that: The mass ratio of the zirconium silicate to the barium strontium titanate is 5:3-5.

3. A high-strength polyurethane foam material according to claim 1, characterized in that: The catalyst includes an amine catalyst and / or a tin catalyst; The chain extender includes one or two of diols and diamines; The antioxidant includes one or two of a hindered phenol antioxidant and a phosphite antioxidant; The foam stabilizer is water-soluble polysiloxane.

4. A high-strength polyurethane foam material according to claim 1, characterized in that: The filler is an imidazole ethanol modified filler.

5. A high-strength polyurethane foam material according to claim 4, characterized in that: The preparation method of the imidazole ethanol modified filler comprises the following steps: dissolving imidazole ethanol, mixing with zirconium silicate and barium strontium titanate, and drying to obtain the imidazole ethanol modified filler.

6. A high-strength polyurethane foam material according to claim 5, characterized in that: The mass ratio of the imidazole ethanol to the zirconium silicate is 1:7-9.

7. The high-strength polyurethane foam material according to claim 5, characterized in that: The mixing temperature is 35-45°C and the mixing time is 40-60 minutes; The solvent used for dissolving includes ethanol, and the mass volume ratio of the imidazole ethanol to the solvent is 1 g:80-90 mL.

8. The high-strength polyurethane foam material according to claim 1, characterized in that: The particle size of the zirconium silicate is 1-3 μm; the particle size of the barium strontium titanate is 3-6 μm.

9. The method for preparing a high-strength polyurethane foam material according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, mixing the components except isocyanate to obtain a mixture; S2, mixing the mixture with isocyanate, and foaming and molding to obtain a high-strength polyurethane foam material.

10. The method for preparing a high-strength polyurethane foam material according to claim 9, characterized in that: In step S1, the mixing time is 25-35 s, and the rotation speed is 1000-1500 r / min; In step S2, the mixing time is 6-12 s, and the rotation speed is 2000-2500 r / min.

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