Infrared light reflection heat insulation COC plastic and preparation method and application thereof
阅读说明：本技术 一种红外光反射隔热coc塑料及其制备方法和应用 (Infrared light reflection heat insulation COC plastic and preparation method and application thereof ) 是由 李骏 朱琪敏 汤小苏 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种红外光反射隔热COC塑料及其制备方法和应用。该COC塑料的原料组成包括：COC 50wt％～99.5wt％,红外反射剂0.5wt％～50wt％,抗氧剂0～1wt％,UV稳定剂0～1wt％,二氧化钛0～10wt％；红外反射剂包括颜料蓝28、颜料蓝36、颜料绿50、颜料绿60、颜料黄53、颜料棕24、颜料棕33、颜料黄164、颜料绿17、颜料棕29、颜料黑30、颜料紫16、颜料紫14中的至少一种。所述制备方法：将原料按配比混匀后通过主喂料口加入双螺杆挤出机进行挤出,得到红外光反射隔热COC塑料。该COC塑料应用于包装材料时可防止被包装物品因快速升温而变质,特别适用于包装温度敏感的成分、原料等产品。(The invention discloses an infrared light reflection heat insulation COC plastic and a preparation method and application thereof. The COC plastic comprises the following raw materials: 50-99.5 wt% of COC, 0.5-50 wt% of infrared reflecting agent, 0-1 wt% of antioxidant, 0-1 wt% of UV stabilizer and 0-10 wt% of titanium dioxide; the infrared reflecting agent includes at least one of pigment blue 28, pigment blue 36, pigment green 50, pigment green 60, pigment yellow 53, pigment brown 24, pigment brown 33, pigment yellow 164, pigment green 17, pigment brown 29, pigment black 30, pigment violet 16, pigment violet 14. The preparation method comprises the following steps: the raw materials are uniformly mixed according to the proportion and then are added into a double-screw extruder through a main feeding port for extrusion, and the infrared light reflection heat insulation COC plastic is obtained. When the COC plastic is applied to a packaging material, the packaged article can be prevented from being deteriorated due to rapid temperature rise, and the COC plastic is particularly suitable for packaging products such as temperature-sensitive components, raw materials and the like.)
1. An infrared light reflection heat insulation COC plastic is characterized by comprising the following raw materials:
the infrared reflecting agent comprises at least one of pigment blue 28, pigment blue 36, pigment green 50, pigment green 60, pigment yellow 53, pigment brown 24, pigment brown 33, pigment yellow 164, pigment green 17, pigment brown 29, pigment black 30, pigment violet 16, and pigment violet 14.
2. The infrared light reflecting and heat insulating COC plastic according to claim 1, wherein the antioxidant is a hindered phenol antioxidant and/or a phosphite antioxidant;
the hindered phenol antioxidant is at least one selected from Irgnox 1010, Irgnox 1098 and Irgonox 1076;
the phosphite antioxidant is at least one selected from Irgafos 168 and Ultranox 626.
3. The infrared light reflection heat insulation COC plastic as claimed in claim 2, wherein the antioxidant is a compound of a hindered phenol antioxidant and a phosphite antioxidant in a mass ratio of 1-2: 1.
4. The infrared light reflecting and insulating COC plastic according to claim 1, wherein the UV stabilizer is at least one selected from the group consisting of Tinuvin 326, Tinuvin 234, Tinuvin 350, CYASORB UV-5411, and CYASORB UV-3638.
5. The infrared light reflecting thermal insulating COC plastic of claim 1, wherein the infrared reflecting agent comprises pigment yellow 53, pigment blue 28, and pigment violet 16.
6. The infrared light reflecting and heat insulating COC plastic as claimed in claim 5, wherein the mass ratio of pigment yellow 53, pigment blue 28 and pigment violet 16 is 1-3: 0.5-3.
7. The infrared light reflecting and heat insulating COC plastic as claimed in any one of claims 1 to 6, wherein the raw material composition comprises:
8. the preparation method of the infrared light reflection heat insulation COC plastic as claimed in any one of claims 1 to 7, wherein the method comprises the following steps: uniformly mixing the raw materials according to a ratio, adding the mixture into a double-screw extruder through a main feeding port, and extruding to obtain the infrared light reflection heat insulation COC plastic;
the temperature of a machine barrel of the double-screw extruder is 255-265 ℃, and the rotating speed of a screw is 250-350 rpm.
9. The method of claim 8, wherein the COC is dried to remove water before being mixed with other raw materials;
the drying adopts vacuum drying, the temperature is 95-105 ℃, and the time is 3-5 h.
10. Use of an infrared light reflecting and insulating COC plastic according to any of claims 1 to 7 in packaging materials.
Technical Field
The invention relates to the field of COC (chip on glass) plastics, in particular to an infrared light reflection heat insulation COC plastic and a preparation method and application thereof.
Background
As a multifunctional packaging material, a Cyclic Olefin Copolymer (COC) resin is widely used in many fields because of its excellent properties such as water vapor barrier property. However, infrared light can penetrate common COC resins, and solar radiation can cause packaged goods to rapidly heat up and deteriorate.
Infrared reflective insulation technology is commonly applied to coatings, but for packaging materials, coating of the coatings involves secondary processes that increase labor hours and costs. Therefore, the infrared reflection modified COC resin is used as a packaging material, secondary processing can be avoided, the working time is saved, and the cost is saved.
The following are some existing infrared reflective plastic inventions.
Chinese patent document CN 104177685 a provides a black nylon 6 plastic containing ferrochrome oxide as an infrared reflecting agent, but only contains one infrared reflecting agent, and the content is limited to 0.5-1.5%. The resin contained only nylon 6, and was only black and gray in color.
Chinese patent document CN 100564442C provides a polymethylmethacrylate plastic containing an infrared reflective metal oxide as a pigment for coloring. But the resin only contains polymethyl methacrylate and the inorganic pigments only relate to pigment green 50 (cobalt ilmenite green spinel), pigment green 17 (chromium oxide), pigment brown 29 (chromium iron oxide), pigment brown 35 (iron chromite brown spinel), pigment black 30 (nickel iron chromite black spinel).
Chinese patent document CN 105008446A discloses a polycarbonate plastic formula containing infrared reflection pigment and stabilizer, aiming at improving melt stability while realizing infrared reflection. The infrared reflective pigments comprise only pigment brown 29 (chromia), pigment green 50 (cobalt ilmenite green spinel), pigment blue 28 (cobalt aluminate blue spinel), pigment blue 36 (cobalt chromite blue spinel), chromium oxide green chromium green-black-hematite. The content is limited to 0.35-4%. Fields of application include buildings, motor vehicles and rail vehicles.
In the prior art, the choice of infrared reflecting agents is limited and infrared reflection modified COCs have not been addressed.
At present, the following technical problems generally exist in the prior art:
1. there is no infrared thermal insulating COC plastic;
2. the existing infrared reflection plastic color matching space is narrow, only green, blue, brown, black, gray and other hues can be realized, and purple, yellow and other colors cannot be realized.
3. Although the infrared reflection pigment can reflect infrared rays to realize heat insulation, the infrared reflection pigment cannot prevent ultraviolet light from degrading plastics.
Disclosure of Invention
Aiming at the technical problems and the defects in the field, the invention provides the infrared light reflection heat insulation COC plastic which can be used as a packaging material to provide a better heat insulation function, and the selection range of an infrared reflecting agent is expanded, so that the infrared reflection can contain a larger color matching space, the product color is richer and more various, and the COC plastic is suitable for various requirements and application scenes.
An infrared light reflection heat insulation COC plastic comprises the following raw materials:
the infrared reflecting agent comprises at least one of pigment blue 28, pigment blue 36, pigment green 50, pigment green 60, pigment yellow 53, pigment brown 24, pigment brown 33, pigment yellow 164, pigment green 17, pigment brown 29, pigment black 30, pigment violet 16, and pigment violet 14.
In the infrared light reflection heat insulation COC plastic, titanium dioxide can be used for adjusting the color of a product on one hand due to the white characteristic of the titanium dioxide, and can also play a certain infrared light reflection heat insulation role on the other hand.
Preferably, the antioxidant is a hindered phenol antioxidant and/or a phosphite antioxidant;
the hindered phenol antioxidant is at least one selected from Irgnox 1010, Irgnox 1098 and Irgonox 1076;
the phosphite antioxidant is at least one selected from Irgafos 168 and Ultranox 626.
Preferably, the antioxidant is a compound of hindered phenol antioxidant and phosphite antioxidant in a mass ratio of 1-2: 1, and can generate a better synergistic effect with the UV stabilizer and the infrared reflecting agent.
Preferably, the UV stabilizer is at least one selected from Tinuvin 326, Tinuvin 234, Tinuvin 350, CYASORB UV-5411 and CYASORB UV-3638.
Researches show that in the infrared light reflection heat insulation COC plastic system, when the infrared reflection agent of the special type, the preferable antioxidant and the preferable UV stabilizer exist at the same time, the infrared reflection agent, the preferable antioxidant and the preferable UV stabilizer can play a better synergistic effect, so that the obtained COC plastic has better color aging resistance.
Preferably, the infrared light reflection heat insulation COC plastic comprises the following raw materials:
in the infrared light reflection heat insulation COC plastic, when only a single-component pigment is used as the infrared reflection agent, the product obtained by using the pigment yellow 53 or the pigment brown 24 has better infrared reflection capability and heat insulation performance.
When a compound pigment is used as the infrared reflecting agent, the infrared reflecting agent preferably includes pigment yellow 53, pigment blue 28 and pigment violet 16. The combination of these three pigments was found to have a strong synergistic effect. Compared with the addition of each single pigment component, the plastic obtained by adding the three pigments in combination has better infrared reflection capability and heat insulation performance. Even if the three pigments are compounded to form a black product which is extremely easy to absorb light, the black product still has excellent infrared reflection capability and heat insulation performance.
More preferably, the mass ratio of the pigment yellow 53 to the pigment blue 28 to the pigment violet 16 is 1-3: 0.5-3.
The invention also provides a preparation method of the infrared light reflection heat insulation COC plastic, which comprises the following steps: and uniformly mixing the raw materials according to a ratio, and adding the mixture into a double-screw extruder through a main feeding port for extrusion to obtain the infrared light reflection heat insulation COC plastic.
Preferably, the barrel temperature of the double-screw extruder is 255-265 ℃, and the screw rotating speed is 250-350 rpm.
Preferably, in the preparation method, the COC is subjected to drying and water removal treatment before being mixed with other raw materials.
Preferably, the drying is vacuum drying at 95-105 ℃ for 3-5 hours.
The invention also provides application of the infrared light reflection heat insulation COC plastic in a packaging material. When the infrared light reflection heat insulation COC plastic is applied to a packaging material, packaged articles can be prevented from being deteriorated due to rapid temperature rise, and the infrared light reflection heat insulation COC plastic is particularly suitable for packaging products such as temperature-sensitive components and raw materials.
Compared with the prior art, the invention has the main advantages that: the infrared light reflection heat insulation COC plastic has excellent water vapor barrier property, weather resistance and color stability, has excellent infrared reflection capability and heat insulation property, and can keep low temperature under illumination.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer.
Tables 1-3 show the formulations of COC plastics of specific examples and comparative examples and corresponding performance test results. Unless otherwise specified, the percentages of the raw material components are weight percentages.
The preparation method of the COC plastics of each example and each comparative example comprises the following steps: the raw material components are measured according to the formula shown in tables 1-3, wherein Topas 8007 is adopted as COC, before the COC is used, drying is carried out for 4 hours at 100 ℃ in vacuum to remove moisture, then other components are uniformly mixed, and then the mixture is added into a double-screw extruder through a main feeding port to be extruded, the double-screw extruder adopts ZE25 of Krauss Maffei Berstorff, the temperature of a machine barrel is set to be 260 ℃, the rotating speed of a screw is 300rpm, and the throughput is 25 kg/h.
The heat insulation test method comprises the following steps: the plastic particles prepared in each example and comparative example were respectively injection molded into 2mm thick color plates, the injection molding temperature was 280 ℃ and the mold temperature was 80 ℃. The infrared light heating experiment was performed at a temperature of 23 ℃ and a Relative Humidity (RH) of 50%. The surface temperature was measured as the final temperature by irradiating the plate with 150W infrared light for 10 minutes at a distance of 20cm above the plastic color plate.
TABLE 1
As can be seen from Table 1, when only a single infrared reflecting agent is used, the COC plastic obtained by using pigment yellow 53 or pigment brown 24 has better infrared reflection capability and heat insulation performance, and the final temperature of the heat insulation experiment is obviously lower than that of other examples and comparative examples. In addition, the pigment can increase the selection of yellow and purple, so that the infrared reflection can contain larger color matching space, the product color is richer and more diversified, and the pigment is suitable for various requirements and application scenes.
TABLE 2
Comparative example 2
Comparative example 3
Example 8
COC
93％
97.4％
93％
Pigment yellow 53
5％
4.4％
Titanium dioxide Tipure R105
2％
2％
2％
Irgnox 1010
0.2％
0.2％
Ultranox 626
0.2％
0.2％
UV stabilizer Tinuvin 234
0.2％
0.2％
Initial temperature (. degree. C.) of heat insulation experiment
23
23
23
Final temperature (. degree. C.) of the insulation experiment
30
37
30
dE after 500 hours of aging at 85 ℃ with 85% RH
3.2
4.1
0.4
dE after 500 hours of xenon lamp aging
5.3
7.3
1.2
In Table 2, dE represents the color difference after aging versus before aging, as measured by Xrite corporation, model Ci7800 colorimeter, using a D65 illuminant in reflectance mode and a 10 degree observation angle. The xenon lamp ageing standard is performed according to GB 9344. As can be seen from comparative example 2 and example 8 in Table 2, the heat-insulating property of the COC plastic is almost unchanged by replacing part of the infrared reflecting agent with the compound antioxidant and the UV stabilizer, and the synergistic effect of the compound antioxidant, the UV stabilizer and the infrared reflecting agent on the infrared light reflecting capacity and the heat-insulating property of the product is reflected. As can be seen from comparative example 3 and example 8 in Table 2, if no infrared reflecting agent is added, the heat-insulating property of the product is poor, and the wet heat resistance and the light aging resistance of the color are poor if only the compound antioxidant and the UV stabilizer are added, which shows that the infrared reflecting agent can not only improve the infrared reflection and the heat-insulating effect of the product, but also can be used for improving the wet heat resistance and the light aging resistance of the color of the product by cooperating with the compound antioxidant and the UV stabilizer. Therefore, the infrared reflection pigment/titanium dioxide/antioxidant/UV stabilizer compound formula has better color aging stability of heat and humidity resistance and illumination resistance while maintaining the heat insulation performance.
TABLE 3
Comparative example 4
Example 9
COC
95％
95％
Pigment brown 29
5％
Pigment yellow 53
2％
Pigment blue 28
2％
Pigment Violet 16
1％
L*
29.3
28.1
Initial temperature (. degree. C.) of heat insulation experiment
23
23
Final temperature (. degree. C.) of the insulation experiment
39
34
In Table 3, L indicates the shade of the panel, lower values indicate darker black, as measured by Xrite, model Ci7800 color meter, using a D65 light source in reflectance mode and a 10 degree viewing angle. According to the principle of color reduction and light supplement, red, yellow and blue pigments can be used for blending black.
Comparing examples 4, 5 and 7 in table 2 with comparative examples 4 and 9 in table 3, it can be seen that pigment yellow 53, pigment blue 28 and pigment violet 16 have better infrared reflection capability and thermal insulation performance than those of COC plastics obtained by adding the three pigments in combination compared with the addition of the respective single pigment components. Under the condition of compounding to form deep black, the product still has excellent infrared reflection capability and heat insulation performance.
The combination of pigment yellow 53/pigment blue 28/pigment violet 16 realizes the deep blackness of the product and simultaneously achieves excellent infrared reflection and heat insulation effects.
Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the above description of the present invention, and equivalents also fall within the scope of the invention as defined by the appended claims.