Single-component low-viscosity high-weather-resistance surface spraying material as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of polyurethane surface spraying materials, and particularly relates to a single-component surface spraying material with low viscosity and high weather resistance as well as a preparation method and application thereof. The single-component low-viscosity high-weather-resistance surface spraying material is prepared from the following raw materials: polyether polyol, isocyanate, reactive pigment, filler, a dispersing agent, a catalyst, an ultraviolet light absorber and an antioxidant. The preparation method of the single-component low-viscosity high-weather-resistance surface spraying material comprises the following steps: adding the dispersing agent into the polyether polyol, uniformly stirring, adding the pigment and the filler, uniformly stirring, dehydrating, adding the isocyanate, the ultraviolet light absorber and the antioxidant, pre-polymerizing, cooling, and adding the catalyst to obtain the single-component low-viscosity high-weather-resistance surface spraying material. The single-component low-viscosity high-weather-resistance surface spraying material has the advantages of being environmentally friendly, low in viscosity, excellent in mechanical property and high in weather resistance, and when the single-component low-viscosity high-weather-resistance surface spraying material is applied to a runway surface spraying layer, construction is easy, the color is attractive, and color fading and fading are not likely to happen; the invention also provides a preparation method thereof.

Description

Technical Field

[0001] The invention belongs to the technical field of polyurethane spray surface materials, and specifically relates to a single-component, low-viscosity, high-weather-resistant spray surface material and a preparation method and application thereof. Background Art

[0002] The plastic track is made of polymer materials, which are comfortable, beautiful in color, low in maintenance cost, good in elasticity, wear-resistant, and non-slip, providing an ideal sports venue for athletes. The plastic track is not only widely used in various schools, stadiums and other places, but also has become one of the standard venues for international track and field competitions. However, there are many problems with the plastic track. First, most of the spraying materials are two-component materials. When using them, the adhesive and color paste need to be matched on site, which may cause inaccurate amount of color paste added and inconsistent color of the venue. Secondly, the viscosity of the material increases at low temperature (≤15℃), making on-site construction difficult. Finally, the venue is not weather-resistant enough and is prone to fading and discoloration after long-term use.

[0003] Patent CN106118429A discloses a solvent-free one-component self-graining material and its preparation method. The material is a single-component product and does not require on-site mixing of materials. The product can be sprayed on a polished plastic base. However, the pigment used in the patent is red iron oxide, which is a dispersed pigment. As the spray material continues to age, the pigment will gradually fade and discolor, affecting the use of the site.

[0004] In addition, in order to improve the weather resistance of the plastic track, some toluene diisocyanate (TDI) is usually added to the raw materials to replace the relatively poor weather resistance of diphenylmethane diisocyanate (MDI-50). Patent CN109651594A discloses a high-strength, aging-resistant, self-graining material and its preparation method. Toluene diisocyanate is introduced into the formula, and it is reasonably proportioned with aliphatic isocyanate to extend the operation time, improve the mechanical properties of the product, improve the weather resistance of the product, and improve the fading and discoloration of the product. However, it adopts two components, and the two components A and B need to be mixed evenly before use during construction. There is a risk of inconsistent site color due to uneven mixing. Secondly, the use of toluene diisocyanate has a relatively strong odor in summer; therefore, an environmentally friendly, single-component, and weather-resistant spray material is needed. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects of the prior art and provide a single-component, low-viscosity, high-weather-resistant spray surface material, which has the characteristics of environmental protection, low viscosity, excellent mechanical properties, and high weather resistance. It is applied to the runway spray surface layer, has simple construction, beautiful color, and is not easy to fade. The present invention also provides a preparation method thereof.

[0006] The one-component, low-viscosity, high-weather-resistant spray material of the present invention comprises the following raw materials in parts by weight: 50-60 parts of polyether polyol, 10-15 parts of isocyanate, 2-4 parts of pigment, 20-30 parts of filler, 1-1.5 parts of dispersant, 0.05-0.1 parts of catalyst, 0.5-1 parts of ultraviolet absorber, and 0.5-1 parts of antioxidant.

[0007] The polyether polyol is prepared by mixing a polyether polyol having a weight average molecular weight of 2000-4000 and a functionality of 2 and a polyether polyol having a weight average molecular weight of 2000-6000 and a functionality of 3; the polyether polyol having a weight average molecular weight of 2000-4000 and a functionality of 2 is preferably polyether polyol INOVOL C240A produced by Shandong INOVOL New Materials Co., Ltd.; the polyether polyol having a weight average molecular weight of 2000-6000 and a functionality of 3 is preferably polyether polyol EP3600 produced by Shandong Bluestar Dongda Co., Ltd.; wherein the mass ratio of INOVOL C240A to EP3600 is 4:1.

[0008] The isocyanate is diphenylmethane diisocyanate, preferably MDI-50 produced by Wanhua Chemical Group Co., Ltd.

[0009] The pigment is a reactive pigment, and the reactive pigment is Red X64.

[0010] The dispersant is DISPERBYK-2164, produced by BYK of Germany.

[0011] The catalyst is an amine catalyst DMDLC, produced by Huntsman Company of the United States.

[0012] The ultraviolet absorber is ethyl 4-[[(methylphenylamino)methylene]amino]benzoate.

[0013] The antioxidant is n-octadecyl beta-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid.

[0014] The filler is talcum powder with a particle size of 800 meshes.

[0015] The method for preparing the one-component low-viscosity and high-weather-resistant spray-surface material comprises the following steps: Put polyether polyol and dispersant into the reaction kettle, stir evenly, then add pigment and filler, stir evenly, heat up to 95-105℃, then dehydrate under -0.1MPa vacuum, react until the moisture content is <0.1wt.%, cool down to 30-45℃, add isocyanate, ultraviolet absorber and antioxidant, heat up to 70-90℃, carry out prepolymerization for 2-3h, cool down to 40-50℃ after the reaction, add catalyst, stir evenly, and obtain a single-component low-viscosity and high weather-resistant spray material.

[0016] The one-component low-viscosity and high-weather-resistant spray material is used for spraying the runway surface. When the product is used, add 1 times of EPDM particles and 20% of rubber powder to the one-component low-viscosity and high-weather-resistant spray material, mix well, and then spray it on the plastic base surface.

[0017] The present invention adopts the idea of ​​single-component spraying, which fundamentally eliminates the problems of inconsistent pigment addition amount and uneven site color caused by on-site mixing; secondly, through reasonable formula design, the product strength is excellent, the idea of ​​adding conventional dispersed pigments is abandoned, and a new reactive pigment is introduced. Different from the color paste formed by ordinary pigments dispersed in polyols, the reactive pigment is grafted with the pigment and the polyether component, and then the polymer chain containing reactive hydroxyl groups is connected with the chromophore group, so that the pigment and the polyether raw material are integrated. In the polyurethane reaction process, the chromophore group is connected to the polymer network, and the excellent effect of firm color and no migration and fading is achieved; finally, a specific dispersant is introduced before the polyurethane reaction, the pigment is stabilized by steric hindrance, and the same charge is provided to different pigments. The repulsive force and steric hindrance obtained avoid co-flocculation and the floating color and blooming phenomenon caused by the pigment in the mixture, and the viscosity of the material is further reduced to obtain a uniform low-viscosity product.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) The one-component, low-viscosity, high-weather-resistant spray material of the present invention has good weather resistance and will not fade after long-term use. The reactive pigment is introduced through reasonable formula design, and the polymer containing reactive hydroxyl groups is connected to the chromophore group. During the polyurethane reaction process, the coloring group is connected to the polymer network, achieving the excellent effect of color fastness and non-migration and fading. The catalyst, filler and dispersant are combined to ensure good compatibility between the raw materials, uniform color of the system, and excellent mechanical properties of the product.

[0019] (2) The one-component, low-viscosity, high-weather-resistant spray material of the present invention has low material viscosity and is easy to construct at low temperatures. The dispersant is introduced before the polyurethane reaction to avoid flocculation through steric hindrance and improve the stability of the pigment and filler in the system. The dispersant provides the same charge to different pigments and fillers, and reduces the viscosity of the material system through repulsion and steric hindrance, thereby obtaining a uniform low-viscosity product.

[0020] (3) The one-component, low-viscosity, high-weather-resistant spraying material of the present invention adopts a one-component spraying material, which fundamentally avoids the problem of uneven site color caused by on-site mixing of materials, and is applied to the spraying of the runway surface layer, which is simple to construct and convenient to operate.

[0021] (4) The preparation method of the one-component low-viscosity and high-weather-resistant spray surface material of the present invention has a simple process and the raw materials are all environmentally friendly, thus ensuring the environmental friendliness of the product production and use process. DETAILED DESCRIPTION

[0022] The present invention is further described below with reference to the following examples and comparative examples. The raw materials used in the examples, unless otherwise specified, are all commercially available conventional raw materials; the process methods used in the examples, unless otherwise specified, are all conventional methods in the art.

[0023] The raw materials used in the embodiments and comparative examples are described as follows: INOVOL C240A: Shandong Yinuowei New Materials Co., Ltd.; EP3600: Shandong Bluestar Dongda Co., Ltd.; Red X64: Milliken, USA; DISPERBYK-2164: BYK, Germany; Amine catalyst DMDLC: Huntsman Company, USA.

[0024] The method for preparing the one-component low-viscosity and high-weather-resistant spray-surface material comprises the following steps: Add polyether polyol to the reaction kettle, add dispersant, stir evenly, then add reactive pigment and filler, stir evenly, heat up to 95-105℃, dehydrate under -0.1MPa vacuum, and react until the moisture content is <0.1wt.%. Then cool down to 30-45℃, add isocyanate, ultraviolet absorber and antioxidant, heat up to 70-90℃, and carry out prepolymerization for 2-3h. After the reaction, cool down to 40-50℃, add catalyst, stir evenly, and obtain a single-component, low-viscosity and high-weather-resistant spray material.

[0025] Example 1 The method for preparing the one-component low-viscosity and high-weather-resistant spray-surface material comprises the following steps: Add 400kg of polyether polyol INOVOL C240A and 100kg of polyether polyol EP3600 to the reactor, add 15kg of dispersant DISPERBYK-2164, stir evenly, and then add 40kg of reactive pigment Red X64, 300kg of 800-mesh talcum powder, stir evenly, heat to 95°C, dehydrate under -0.1MPa vacuum, and react until the moisture content is <0.1wt.%. Then cool to 30°C, add 124kg of isocyanate MDI-50, 10kg of ultraviolet absorber 4-[[(methylphenylamino)methylene]amino]ethyl benzoate, 10kg of antioxidant β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n-octadecanol, heat to 70°C, carry out prepolymerization for 3h, cool to 40°C, add 1kg of amine catalyst DMDLC, stir evenly, and obtain a single-component, low-viscosity, high-weather-resistant spray material.

[0026] Example 2 The method for preparing the one-component low-viscosity and high-weather-resistant spray-surface material comprises the following steps: Add 480kg of polyether polyol INOVOL C240A and 120kg of polyether polyol EP3600 to the reactor, add 10kg of dispersant DISPERBYK-2164, stir evenly, and then add 20kg of reactive pigment Red X64, 259.5kg of filler talcum powder, stir evenly, heat to 105℃, dehydrate under -0.1MPa vacuum, and react until the moisture content is <0.1wt.%. Then cool to 45℃, add 100kg of isocyanate MDI-50, 5kg of ultraviolet absorber 4-[[(methylphenylamino)methylene]amino]ethyl benzoate, 5kg of antioxidant β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n-octadecanol, heat to 90℃, carry out prepolymerization for 2h, cool to 50℃, add 0.5kg of amine catalyst DMDLC, stir evenly, and obtain a one-component low-viscosity and high weather resistance spray material.

[0027] Example 3 The method for preparing the one-component low-viscosity and high-weather-resistant spray-surface material comprises the following steps: Add 472kg of polyether polyol INOVOL C240A and 118kg of polyether polyol EP3600 to the reactor, add 11.2kg of dispersant DISPERBYK-2164, stir evenly, and then add 30kg of reactive pigment Red X64, 200kg of 800-mesh talcum powder, stir evenly, heat to 100°C, dehydrate under -0.1MPa vacuum, and react until the moisture content is <0.1wt.%. Then cool to 40°C, add 150kg of isocyanate MDI-50, 9kg of ultraviolet absorber 4-[[(methylphenylamino)methylene]amino]ethyl benzoate, 9kg of antioxidant β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n-octadecanol, heat to 80°C, carry out prepolymerization for 2.5h, cool to 45°C, add 0.8kg of amine catalyst DMDLC, stir evenly, and obtain a one-component low-viscosity and high weather-resistant spray material.

[0028] Comparative Example 1 This comparative example is the same as Example 1, except that an equal mass of conventional pigment red iron oxide is used instead of reactive pigment Red X64, and the remaining steps are the same as Example 1.

[0029] Comparative Example 2 This comparative example is the same as Example 1, except that the dispersant DISPERBYK-2164 is replaced by DISPERBYK-110 of the same mass, and the remaining steps are the same as Example 1.

[0030] Comparative Example 3 The method for preparing the one-component low-viscosity and high-weather-resistant spray-surface material comprises the following steps: 400 kg of polyether polyol INOVOL C240A and 100 kg of polyether polyol EP3600 were added to a reactor, and then 40 kg of reactive pigment Red X64 and 300 kg of filler 800 mesh talc were added, stirred evenly, heated to 95°C, dehydrated under a vacuum of -0.1 MPa, and the reaction was terminated when the moisture content was <0.1 wt.%, then cooled to 30°C, 124 kg of isocyanate MDI-50, 10 kg of ultraviolet absorber 4-[[(methylphenylamino)methylene]amino]ethyl benzoate, and 10 kg of antioxidant β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n-octadecyl alcohol were added, heated to 70°C, and prepolymerized for 3 hours, cooled to 40°C, 1 kg of amine catalyst DMDLC and 15 kg of dispersant DISPERBYK-2164 were added, stirred evenly, and a single-component low-viscosity and high-weather-resistant spray material was obtained.

[0031] The products obtained in Examples 1-3 and Comparative Examples 1-3 were subjected to performance testing. At the same time, products were prepared according to the schemes described in Example 1 of Patent CN106118429A (recorded as Comparative Example 4) and Example 1 of Patent CN109651594A (recorded as Comparative Example 5), and were subjected to performance testing with conventional products on the market. The performance testing methods of the embodiments, comparative examples and conventional products are exactly the same, and the test results are shown in Table 1.

[0032] The material viscosity was tested during construction at 0-5°C and 10-15°C. Aging conditions: the sample was placed at 65°C, wavelength 340nm, and light intensity 0.51W / m 2 Under the following conditions, the samples were aged for 108 minutes and then sprayed for 12 minutes, which was considered as one cycle. After 250 cycles of reciprocating treatment, the post-aging test was performed.

[0033] Table 1 Test results

[0034] As can be seen from Table 1, the product prepared by the present invention has excellent mechanical properties, high weather resistance, no fading or discoloration after aging, and low construction viscosity, and is very easy to construct, compared with the products described in Comparative Examples 4 and 5 and conventional products on the market; it can be seen from the comparison of Example 1 with Comparative Example 1 that after the ordinary dispersed pigment is replaced with a reactive pigment, the weather resistance of the product is significantly improved, and the color fixation effect is achieved by linking the reactive hydroxyl polymer to the chromophore group and the coloring group is connected to the polymer network, that is, by introducing the reactive pigment into the product, an excellent effect is produced; it can be seen from the comparison of Example 1 with Comparative Example 2 that After changing the dispersant, the weather resistance of the product decreased and discoloration occurred. The reason is that the reactive pigment has its own particularity and poor compatibility with the system, and the conventional dispersant cannot be combined with the reactive pigment, making it difficult to fully exert the weather resistance of the reactive pigment. By comparing Example 1 with Comparative Example 3, it can be seen that the addition of the dispersant in advance, on the one hand, effectively reduces the interfacial tension between liquid-liquid and solid-liquid, improves the uniform dispersion of the pigment, greatly increases the amount of pigment loaded in the system, and improves the hiding power and gloss of the system. On the other hand, it reduces the viscosity, improves the fluidity of the system, and is more conducive to low-temperature use.

Claims

1. A one-component, low-viscosity, high-weather-resistant spraying material, characterized in that: The invention comprises the following raw materials in parts by weight: polyether polyol: 50-60 parts, isocyanate: 10-15 parts, pigment: 2-4 parts, filler: 20-30 parts, dispersant: 1-1.5 parts, catalyst: 0.05-0.1 parts, ultraviolet absorber: 0.5-1 parts, antioxidant: 0.5-1 parts; The pigment is a reactive pigment; The dispersant is DISPERBYK-2164.

2. The one-component low-viscosity and high-weather-resistant spraying material according to claim 1, characterized in that: The polyether polyol is prepared by mixing a polyether polyol with a weight average molecular weight of 2000-4000 and a functionality of 2 and a polyether polyol with a weight average molecular weight of 2000-6000 and a functionality of 3.

3. The one-component low-viscosity and high-weather-resistant spraying material according to claim 1, characterized in that: The isocyanate is diphenylmethane diisocyanate.

4. The one-component low-viscosity and high-weather-resistant spraying material according to claim 1, characterized in that: The reactive pigment is Red X64.

5. The one-component low-viscosity and high-weather-resistant spraying material according to claim 1, characterized in that: The catalyst is an amine catalyst DMDLC.

6. The one-component low-viscosity and high-weather-resistant spraying material according to claim 1, characterized in that: The ultraviolet absorber is ethyl 4-[[(methylphenylamino)methylene]amino]benzoate.

7. The one-component low-viscosity and high-weather-resistant spraying material according to claim 1, characterized in that: The antioxidant is n-octadecyl beta-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid.

8. The one-component low-viscosity and high-weather-resistant spraying material according to claim 1, characterized in that: The filler is talcum powder with a particle size of 800 meshes.

9. A method for preparing a one-component, low-viscosity, high-weather-resistant spraying material according to any one of claims 1 to 8, characterized in that: The following steps are involved: Put polyether polyol and dispersant into the reaction kettle, stir evenly, then add pigment and filler, stir evenly, heat up to 95-105℃, then dehydrate under -0.1MPa vacuum, react until the moisture content is <0.1wt.%, cool down to 30-45℃, add isocyanate, ultraviolet absorber and antioxidant, heat up to 70-90℃, carry out prepolymerization for 2-3h, cool down to 40-50℃ after the reaction, add catalyst, stir evenly, and obtain a single-component low-viscosity and high weather-resistant spray material.

10. An application of the one-component low-viscosity high-weather-resistant spraying material according to any one of claims 1 to 8, characterized in that: Used for spraying of runway surface.

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