High-weather-resistance air conditioner ribbon film and preparation method thereof

Abstract

The invention discloses a high-weather-resistance air conditioner ribbon film and a preparation method thereof, and relates to the field of PVC films. The high-weather-resistance air conditioner ribbon film is prepared from the following components in parts by weight: 80 to 120 parts of polyvinyl chloride resin, 2 to 5 parts of a heat stabilizer, 30 to 40 parts of a plasticizer, 0.5 to 5 parts of a coupling agent, 0.5 to 5 parts of a heat insulation agent, 0.5 to 3 parts of an ultraviolet light absorber, 0.5 to 2 parts of an antioxidant, 0.1 to 1 part of a light stabilizer, 5 to 20 parts of a filling agent and 0.1 to 5 parts of an auxiliary agent. According to the invention, the anti-aging performance can be improved, and the service life can be prolonged.

Description

Technical Field

[0001] The invention relates to the field of PVC films, in particular to a highly weather-resistant air-conditioning tie film and a preparation method thereof. Background Art

[0002] Air conditioning tie film is used to tie the copper pipes of air conditioners, protecting them and providing insulation. Most copper pipes are outdoors, exposed to sunlight for long periods of time. After a period of use, they are easily affected by light and heat, aging, causing a decline in physical properties and even brittleness and detachment, resulting in loss of effectiveness and poor cooling performance. To address this issue, prior art (CN108164870A) proposes an air conditioning tie film that incorporates 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline, N-phenyl-N'-isopropyl-p-phenylenediamine, and N-N'-diphenyl-p-phenylenediamine as antioxidants to improve aging resistance. However, 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline has a low boiling point and may volatilize at high temperatures, so its molding temperature is also relatively low, ranging from 150 to 170°C. However, this temperature can lead to poor plasticization and reduced mechanical properties. However, N,N'-diphenyl-p-phenylenediamine has poor dispersibility and is difficult to disperse effectively at low temperatures. Therefore, a high content of plasticizer is introduced into the prior art, which also makes the film easily hardened and brittle, and reduces heat resistance. Summary of the Invention

[0003] Based on this, the purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a highly weather-resistant air-conditioning tie film and a preparation method thereof, which can effectively improve the light aging resistance and heat aging resistance and extend its service life.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a highly weather-resistant air-conditioning tie film, comprising the following components in parts by weight:

[0005] 80 to 120 parts of polyvinyl chloride resin, 2 to 5 parts of heat stabilizer, 30 to 40 parts of plasticizer, 0.5 to 5 parts of coupling agent, 0.5 to 5 parts of heat insulation agent, 0.5 to 5 parts of ultraviolet absorber, 0.5 to 2 parts of antioxidant, 0.1 to 1 part of light stabilizer, 5 to 20 parts of filler, and 0.1 to 5 parts of auxiliary agent.

[0006] The high weather-resistant air-conditioning tie film of this technical solution simultaneously introduces heat insulation agent, antioxidant, ultraviolet absorber and light stabilizer. The combination of the four has an unexpected synergistic effect on reducing the physical property degradation of the air-conditioning tie film after aging, greatly improving the light aging resistance and heat aging resistance of the air-conditioning tie film.

[0007] The polyvinyl chloride resin (PVC) is a base resin. For example, the amount of polyvinyl chloride resin is 85 parts, 90 parts, 95 parts, 100 parts, 105 parts, 110 parts or 115 parts, but is not limited thereto.

[0008] The heat stabilizer can improve the heat stability of the air conditioner tie film, avoid the decomposition of PVC at high temperature, and reduce the performance decay after aging. For example, the amount of heat stabilizer is 2.5 parts, 3 parts, 3.5 parts, 4 parts or 4.5 parts, but is not limited thereto. Specifically, the heat stabilizer can be a barium-zinc stabilizer or a calcium-zinc stabilizer, but is not limited thereto.

[0009] The plasticizer is used to adjust the hardness of the PVC material system, so that various materials can be easily fused into a whole, and the overall performance is improved. For example, the amount of plasticizer is 32 parts, 34 parts, 36 parts or 38 parts. The amount of plasticizer in the technical solution is less, which can optimize the aging resistance. Preferably, the amount of plasticizer / polyvinyl chloride resin in the present application is less than or equal to 0.4, and more preferably less than or equal to 0.35. Specifically, the plasticizer can be selected from phthalate plasticizers, fatty acid ester plasticizers, polyester plasticizers or epoxy ester plasticizers, but is not limited thereto.

[0010] The coupling agent can improve the compatibility of the heat insulating agent, the filler and the PVC, and reduce the aging rate of the air conditioner tie film. For example, the amount of coupling agent is 0.8 parts, 1.3 parts, 1.8 parts, 2.3 parts, 2.8 parts, 3.3 parts, 3.8 parts or 4.5 parts, but is not limited thereto. Specifically, the coupling agent can be a silane coupling agent or a titanate coupling agent, but is not limited thereto.

[0011] The heat insulating agent can effectively block infrared rays and weaken the influence of heat aging. Specifically, the heat insulating agent can be a metal powder, such as cesium tungsten bronze nano powder, but is not limited thereto. For example, the amount of heat insulating agent is 0.8 parts, 1.4 parts, 2 parts, 2.6 parts, 3.2 parts, 3.8 parts or 4.4 parts, but is not limited thereto.

[0012] The ultraviolet absorber can effectively block ultraviolet rays and weaken the influence of light aging. Specifically, the ultraviolet absorber can be selected from benzotriazole compounds, benzophenone compounds or triazine compounds, but is not limited thereto. For example, the amount of ultraviolet absorber is 1 part, 1.5 parts, 2 parts or 2.5 parts, but is not limited thereto.

[0013] The antioxidant can delay oxidative degradation and maintain the mechanical properties of PVC. Specifically, the antioxidant can be selected from hindered phenol antioxidants or phosphite antioxidants, but is not limited thereto. For example, the amount of antioxidant is 0.7 parts, 1 part, 1.3 parts, 1.6 parts or 1.8 parts, but is not limited thereto.

[0014] Light stabilizers enhance the stability of PVC molecular chains under light exposure, working in conjunction with antioxidants and UV absorbers to block photooxidative chain reactions. Specifically, hindered amine light stabilizers or benzophenone light stabilizers can be used, but are not limited thereto. Exemplary amounts of light stabilizers are 0.2, 0.4, 0.6, or 0.8 parts, but are not limited thereto.

[0015] Fillers can enhance the hardness and strength of PVC materials, as well as their dimensional stability. Specifically, the filler can be, but is not limited to, calcium carbonate powder, talc powder, or mica powder. Exemplary amounts of the filler are, but are not limited to, 7 parts, 10 parts, 13 parts, 16 parts, or 19 parts.

[0016] The additives may be, but are not limited to, common masterbatches and release agents in PVC material systems. For example, the amount of the additives is 0.5 parts, 1 part, 1.5 parts, 2 parts, 3 parts, or 4 parts, but is not limited thereto.

[0017] Preferably, in some embodiments, the thermal insulation agent is cesium tungsten bronze nanoparticles; and / or

[0018] The ultraviolet absorber is selected from 2-hydroxy-4-n-octyloxybenzophenone and / or 2-(2'-hydroxy-5'-methylphenyl)benzotriazole;

[0019] The antioxidant is selected from one or more of antioxidant 1010, antioxidant 168 or antioxidant 225; and / or

[0020] The light stabilizer is light stabilizer 944.

[0021] The selection of the above materials can better improve the light aging resistance and heat aging resistance of the air conditioning cable tie film.

[0022] Preferably, in some embodiments, the heat insulating agent is cesium tungsten bronze nanoparticles with a particle size of 10 nm to 20 nm;

[0023] The ultraviolet absorber is a mixture of 2-hydroxy-4-n-octyloxybenzophenone and 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, and the weight ratio of 2-hydroxy-4-n-octyloxybenzophenone to 2-(2'-hydroxy-5'-methylphenyl)benzotriazole is 1:1.5-2.5;

[0024] The light stabilizer is light stabilizer 944, and its molecular weight is 2500 g / mol to 3000 g / mol.

[0025] Preferably, in some embodiments, the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the weight ratio of antioxidant 1010 to antioxidant 168 is 1:0.2-0.8; or

[0026] The antioxidant is a mixture of the antioxidant 1010 and the antioxidant 168, and the weight ratio of the antioxidant 1010 to the antioxidant 168 is 1:0.2-0.8.

[0027] Preferably, in some embodiments, the highly weather-resistant air-conditioning tie film comprises the following components in parts by weight:

[0028] 100 parts of polyvinyl chloride resin, 3 to 4 parts of heat stabilizer, 30 to 35 parts of plasticizer, 1 to 2 parts of coupling agent, 1 to 3 parts of heat insulation agent, 0.5 to 1 part of ultraviolet absorber, 0.5 to 1 part of antioxidant, 0.2 to 0.5 part of light stabilizer, 10 to 15 parts of filler, and 0.1 to 5 parts of auxiliary agent.

[0029] Preferably, in some embodiments, the degree of polymerization of the polyvinyl chloride resin is 1200 to 1500; and / or

[0030] The heat stabilizer is a liquid barium zinc stabilizer; and / or

[0031] The plasticizer is polyester polyol with a molecular weight of 2000 to 3000; and / or

[0032] The silane coupling agent is a titanate coupling agent; and / or

[0033] The filler is nano calcium carbonate.

[0034] Preferably, in some embodiments, the highly weather-resistant air-conditioning tie film further comprises the following components: 5 to 10 parts of an impact modifier and 5 to 20 parts of titanium dioxide.

[0035] Preferably, in some embodiments, the impact modifier is a core-shell acrylic resin; and / or

[0036] The titanium dioxide is rutile titanium dioxide.

[0037] Correspondingly, the present invention also discloses a method for preparing a highly weather-resistant air-conditioning tie film, which is used to prepare the aforementioned highly weather-resistant air-conditioning tie film, and comprises:

[0038] (1) mixing and plasticizing the components to obtain a plasticized material;

[0039] (2) Calendering the plasticized material into a shape and cooling it to obtain a product.

[0040] Preferably, in some embodiments, in step (1), the components are mixed at 90° C. to 120° C., the mixture is plasticized at 150° C. to 170° C. for the first time, and then plasticized at 160° C. to 180° C. for the second time to obtain a plasticized material;

[0041] In step (2), the plasticized material is calendered using a five-roll calender; wherein the temperature of roller No. 1 is 175°C to 180°C, the temperature of roller No. 2 is 175°C to 185°C, the temperature of roller No. 3 is 180°C to 190°C, the temperature of roller No. 4 is 185°C to 195°C, and the temperature of roller No. 5 is 150°C to 160°C.

[0042] The implementation of the present invention has the following beneficial effects:

[0043] The highly weather-resistant air-conditioning tie film of one embodiment of the present invention simultaneously introduces a heat insulating agent, an antioxidant, an ultraviolet absorber and a light stabilizer. Through the combination of the four, it has an unexpected synergistic effect on reducing the physical property degradation of the air-conditioning tie film after aging, thereby greatly improving the light aging resistance and heat aging resistance of the air-conditioning tie film. DETAILED DESCRIPTION

[0044] In order to better illustrate the purpose, technical solutions and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments.

[0045] In the examples, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used are all commercially available unless otherwise specified.

[0046] The raw materials used in the examples and comparative examples are described below, but are not limited to these materials:

[0047] A: PVC resin, degree of polymerization 1300, commercially available;

[0048] B: heat stabilizer, liquid barium zinc stabilizer, Nantong Aidewang Chemical Co., Ltd.

[0049] C: plasticizer, polyester polyol, molecular weight 3000, W-2370, DIC Corporation;

[0050] D: coupling agent, isopropyl titanate triisostearate, commercially available;

[0051] E: thermal insulation agent, cesium tungsten bronze nanopowder: particle size 10-20nm, Nalinwei Nano Technology (Shanghai) Co., Ltd.

[0052] F1: UV absorber, C81, BASF;

[0053] F2: UV absorber, UV-P, BASF;

[0054] G1: Antioxidant 1010, commercially available;

[0055] G2: Antioxidant 168, commercially available;

[0056] H: Light stabilizer 944, BASF;

[0057] I: Filler, nano calcium carbonate, CCR-701, Dongguan Limao Chemical Co., Ltd.;

[0058] J: Auxiliary, color master batch, commercially available.

[0059] K: Impact modifier, KM-376, Dow Chemical;

[0060] L: Titanium white, chlorination rutile titanium white, commercially available.

[0061] Examples 1-8 and Comparative Examples 1-15

[0062] The components and weight parts of the air conditioner cable tie films of Examples 1-8 and Comparative Examples 1-15 are shown in Tables 1 and 2, and the preparation method is as follows:

[0063] (1) Mix each component at 95-100°C to obtain a mixture;

[0064] (2) Preliminary plasticization of the mixture in an internal mixer, with a preliminary plasticization temperature of 160-165°C;

[0065] (3) Secondary plasticization in an open mill and filtration to obtain a plasticized material; the secondary plasticization temperature is 160-170°C, and the filtration temperature is 175-180°C;

[0066] (4) Calendering molding of the plasticized material using a five-roll calender, embossing, cooling, and winding, to obtain the product. The temperatures of the five rolls are 178°C, 182°C, 188°C, 195°C, and 155°C, respectively.

[0067] Table 1: Example ingredient table

[0068]

[0069]

[0070] Table 2: Comparative Example ingredient table

[0071]

[0072] The air conditioner cable tie films of Examples 1-8 and Comparative Examples 1-15 were tested according to the following specific methods:

[0073] (1) Tensile strength and elongation at break were determined in accordance with the method in GB / T 1040.3-2006 using a Type 2 strip specimen with a width of 20 mm, a total length of not less than 150 mm, and a gauge length of 80 mm.

[0074] (2) Weather resistance: The test was carried out in accordance with ISO 105-B02-2013. The tensile strength and elongation at break were measured after aging for 800 h using a xenon lamp, and the rate of change was calculated.

[0075] The specific test results are shown in Table 3 and Table 4:

[0076] Table 3 Test results

[0077]

[0078] From the comparison of Example 4 and Comparative Examples 1 to 15, it can be seen that after changing the formulation system of the present invention, the decay is faster after aging.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A highly weather-resistant air-conditioning tie film, characterized in that: The composition comprises the following components in parts by weight: 80 to 120 parts of polyvinyl chloride resin, 2 to 5 parts of heat stabilizer, 30 to 40 parts of plasticizer, 0.5 to 5 parts of coupling agent, 0.5 to 5 parts of heat insulation agent, 0.5 to 5 parts of ultraviolet absorber, 0.5 to 2 parts of antioxidant, 0.1 to 1 part of light stabilizer, 5 to 20 parts of filler, and 0.1 to 5 parts of auxiliary agent.

2. The highly weather-resistant air-conditioning tie film according to claim 1, characterized in that: The thermal insulation agent is cesium tungsten bronze nanoparticles; and / or The ultraviolet absorber is selected from 2-hydroxy-4-n-octyloxybenzophenone and / or 2-(2'-hydroxy-5'-methylphenyl)benzotriazole; The antioxidant is selected from one or more of antioxidant 1010, antioxidant 168 or antioxidant 225; and / or The light stabilizer is light stabilizer 944.

3. The highly weather-resistant air-conditioning tie film according to claim 1, characterized in that: The thermal insulation agent is cesium tungsten bronze nanoparticles with a particle size of 10nm to 20nm; The ultraviolet absorber is a mixture of 2-hydroxy-4-n-octyloxybenzophenone and 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, and the weight ratio of 2-hydroxy-4-n-octyloxybenzophenone to 2-(2'-hydroxy-5'-methylphenyl)benzotriazole is 1:1.5-2.5; The light stabilizer is light stabilizer 944, and its molecular weight is 2500 g / mol to 3000 g / mol.

4. The highly weather-resistant air-conditioning tie film according to claim 3, characterized in that: The antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the weight ratio of antioxidant 1010 to antioxidant 168 is 1:0.2-0.8; or The antioxidant is a mixture of the antioxidant 1010 and the antioxidant 168, and the weight ratio of the antioxidant 1010 to the antioxidant 168 is 1:0.2-0.

8.

5. The highly weather-resistant air-conditioning tie film according to any one of claims 1 to 4, characterized in that: The composition comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 3 to 4 parts of heat stabilizer, 30 to 35 parts of plasticizer, 1 to 2 parts of coupling agent, 1 to 3 parts of heat insulation agent, 0.5 to 1 part of ultraviolet absorber, 0.5 to 1 part of antioxidant, 0.2 to 0.5 part of light stabilizer, 10 to 15 parts of filler, and 0.1 to 5 parts of auxiliary agent.

6. The highly weather-resistant air-conditioning tie film according to claim 1, characterized in that: The degree of polymerization of the polyvinyl chloride resin is 1200 to 1500; and / or The heat stabilizer is a liquid barium zinc stabilizer; and / or The plasticizer is polyester polyol with a molecular weight of 2000 to 3000; and / or The silane coupling agent is a titanate coupling agent; and / or The filler is nano calcium carbonate.

7. The highly weather-resistant air-conditioning tie film according to claim 1, characterized in that: The invention also comprises the following components: 5 to 10 parts of impact modifier and 5 to 20 parts of titanium dioxide.

8. The highly weather-resistant air-conditioning tie film according to claim 7, characterized in that: The impact modifier is a core-shell acrylic resin; and / or The titanium dioxide is rutile titanium dioxide.

9. A method for preparing a highly weather-resistant air-conditioning cable tie film, for preparing the highly weather-resistant air-conditioning cable tie film according to any one of claims 1 to 8, characterized in that: include: (1) mixing and plasticizing the components to obtain a plasticized material; (2) Calendering the plasticized material into a shape and cooling it to obtain a product.

10. The method for preparing a highly weather-resistant air-conditioning tie film according to claim 9, wherein: In step (1), the components are mixed at 90° C. to 120° C., the mixture is plasticized at 150° C. to 170° C., and then plasticized at 160° C. to 180° C. to obtain a plasticized material; In step (2), the plasticized material is calendered using a five-roll calender; wherein the temperature of roller No. 1 is 175°C to 180°C, the temperature of roller No. 2 is 175°C to 185°C, the temperature of roller No. 3 is 180°C to 190°C, the temperature of roller No. 4 is 185°C to 195°C, and the temperature of roller No. 5 is 150°C to 160°C.

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