PVC / ABS alloy material, preparation method and application thereof

Abstract

The application discloses a PVC / ABS alloy material and a preparation method and application thereof. The PVC / ABS alloy material comprises the following components in parts by weight: 100 parts of PVC resin, 80-120 parts of ABS resin, 2-5 parts of heat stabilizer, 3-8 parts of toughening agent and 0-3 parts of lubricant. The melt flow rate of the ABS resin is 18-45 g / 10 min under the condition of 220 DEG C and 10 kg. The ABS resin with a specific melt flow rate is selected, and the proportion of the PVC resin and the ABS resin is controlled, so that the Vicat softening temperature of the PVC / ABS alloy material is effectively improved, the melt can be quickly and uniformly copied to the mold texture in the injection molding process, the appearance of the product has a good gloss effect, and the PVC / ABS alloy material with high Vicat softening temperature and high gloss is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high molecular materials, in particular to a PVC / ABS alloy material and a preparation method and application thereof. BACKGROUND

[0002] PVC / ABS alloy combines the impact resistance, low temperature resistance, easy molding processing of acrylonitrile-butadiene-styrene (ABS) and the flame retardant, strong rigidity, corrosion resistance, low price of polyvinyl chloride (PVC), showing great development potential in mechanical parts, textile equipment, automobile instruments, electrical components, luggage manufacturing, etc., but due to its low Vicat softening temperature, poor heat resistance, and low gloss, etc., it is limited in the application of some high surface requirement and high temperature requirement products.

[0003] There are studies to improve the gloss of PVC alloy by adding special additives, such as using surface treatment or coated additives, modified nano fillers, etc., but such additives are high in cost, have limited practical application, and the addition of additives will cause the Vicat softening temperature of the material to decrease and the heat resistance to deteriorate. Chinese patent application CN102875920A discloses that the gloss of ABS / PVC alloy can be improved by adding an appropriate amount of PMMA; Chinese patent application CN112759864A can improve the gloss of PVC / ABS alloy material to a certain extent by the synergistic cooperation of a specific toughening agent and a specific alpha-methylstyrene oligomer with a specific ring and ball softening point; but the above technologies do not take into account the improvement of the heat resistance of ABS / PVC alloy material. In the prior art, the research on improving the Vicat softening temperature of the material is mainly aimed at PVC materials, such as Chinese patent applications CN201210418369.5 and CN202010351623.9, and there is still no related report on the modification of PVC / ABS blending system considering both gloss and heat resistance. SUMMARY

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present application is to provide a PVC / ABS alloy material with high Vicat softening temperature and high gloss.

[0005] Another purpose of the present application is to provide a preparation method of the above-mentioned PVC / ABS alloy material.

[0006] The present application is realized by the following technical solutions:

[0007] A PVC / ABS alloy material, by weight, comprises the following components:

[0008] PVC resin 100 parts;

[0009] ABS resin 80-120 parts;

[0010] heat stabilizer 2-5 parts;

[0011] toughening agent 3-8 parts;

[0012] lubricant 0-3 parts;

[0013] The melt flow rate of the ABS resin under the condition of 220℃ and 10kg is 18-45g / 10min.

[0014] Preferably, the melt flow rate of the ABS resin under the condition of 220℃ and 10kg is 28-36g / 10min. The melt flow rate of the present application refers to the standard GB / T 3682.1-2018.

[0015] Preferably, the notched Izod impact strength of the ABS resin is 11-38kJ / m 2 ; more preferably, the notched Izod impact strength of the ABS resin is 16-35kJ / m 2 . The impact strength of the present application refers to the standard GB / T 1843-2008, and the test condition is 23℃, 4mm thickness A-type notched sample.

[0016] Preferably, the viscosity number of the PVC resin is 62-86mL / g. The viscosity number of the PVC resin refers to the standard GB / T 5761-2016.

[0017] Preferably, the heat stabilizer is selected from organic tin stabilizer. More preferably, the weight percentage content of tin in the organic tin stabilizer is ≥19%. The organic tin stabilizer can be specifically selected from any one or several of mercaptomethyl tin or maleic anhydride organotin.

[0018] Preferably, the toughening agent is selected from MBS type toughening agent; more preferably, the refractive index of the MBS type toughening agent is 1.5-1.6; and more preferably, the refractive index of the MBS type toughening agent is 1.54-1.58. The refractive index refers to GB / T 39691-2020.

[0019] Preferably, the lubricant is selected from any one or several of PE wax, oxidized polyethylene wax, and ester lubricant.

[0020] The application further provides a preparation method of the PVC / ABS alloy material, and comprises the following steps: weighing the PVC resin, the heat stabilizer and the lubricant, and adding them into a high-speed mixer; heating and mixing until the temperature reaches 90-100 DEG C; adding the ABS resin and the toughening agent; discharging the mixed powder in the high-speed mixer into a low-speed mixer after mixing for 3-5 min; discharging the mixed powder into an extruder screw after cooling to 75-80 DEG C; and granulating to obtain the PVC / ABS alloy material.

[0021] The application further provides application of the PVC / ABS alloy material in the field of electronic appliances and household appliances, and the PVC / ABS alloy material can be specifically used in aspects such as a flame-retardant electric control box of an air conditioner, a roof maintenance box shell of an industrial control system, and an electric shell of an ice maker.

[0022] The application has the following beneficial effects:

[0023] The PVC / ABS alloy material has the following beneficial effects: the ABS resin with a specific melt flow rate is selected, and the proportion of the PVC resin and the ABS resin is controlled, so that the Vicat softening temperature of the material is effectively improved, the melt can be quickly and uniformly copied to the mold texture in injection molding, the appearance of the product has a good gloss effect, and the PVC / ABS alloy material with high Vicat softening temperature and high gloss is realized. Embodiment

[0024] The application will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the application, but do not limit the application in any form. It should be pointed out that, for those skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made. These all belong to the protection scope of the application.

[0025] The raw materials used in the examples and comparative examples of the application are described as follows, but are not limited to these materials:

[0026] PVC resin 1: viscosity number 62-73, Sichuan Jinlu PVC JLTS;

[0027] PVC resin 2: viscosity number 73-86, Tianjin Lejin TL-700;

[0028] ABS resin 1: melt flow rate 32 g / 10 min under the condition of 220 DEG C and 10 kg, and cantilever beam notched impact strength 22 kJ / m 2 , ABS 750 N SW, Jinhu;

[0029] ABS resin 2: melt flow rate 20 g / 10 min under the condition of 220 DEG C and 10 kg, and cantilever beam notched impact strength 20 kJ / m 2ABS DG-417, Tianjin Dagu;

[0030] ABS resin 3: melt flow rate 42 g / 10 min at 220℃, 10 kg, notched Izod impact strength 18 kJ / m 2 ABS DG-MG94, Tianjin Dagu;

[0031] ABS resin 4: melt flow rate 20 g / 10 min at 220℃, 10 kg, notched Izod impact strength 27 kJ / m 2 ABS TH-171, Jilin Petrochemical;

[0032] ABS resin 5: melt flow rate 32 g / 10 min at 220℃, 10 kg, notched Izod impact strength 11 kJ / m 2 RABS UCT-1014 PB21(DLX), Zaoqing Yuandong;

[0033] ABS resin 6: melt flow rate 11 g / 10 min at 220℃, 10 kg, notched Izod impact strength 47 kJ / m 2 ABS AG10NP-AK, Taiwan of China;

[0034] ABS resin 7: melt flow rate 51 g / 10 min at 220℃, 10 kg, notched Izod impact strength 20 kJ / m 2 ABS HP181, Huizhou LG;

[0035] Heat stabilizer: mercaptan organotin, tin content 19.1%, Yunnan Tin Industry YT-181;

[0036] Toughening agent 1: MBS type toughening agent, refractive index 1.55, Japan Zhong Yuan B564;

[0037] Toughening agent 2: MBS type toughening agent, refractive index 1.51, Japan Zhong Yuan B625;

[0038] Lubricant: polyethylene wax, commercially available, the same lubricant is used in the examples and comparative examples.

[0039] Preparation method of PVC / ABS alloy material of examples and comparative examples:

[0040] According to the proportion, the PVC resin, the heat stabilizer and the lubricant are added into a high-speed mixer, heated and mixed to 100 DEG C, the ABS resin and the toughening agent are added, mixed for 3 minutes, and then the mixed powder in the high-speed mixer is discharged into a low-speed mixer, cooled to 80 DEG C, and then discharged into the screw of an extruder for granulation, wherein the temperature of the discharge section is 145 DEG C, the temperature of the plasticizing section is 155 DEG C, the temperature of the conveying section is 160 DEG C, the main machine current is 40 A, and thus the PVC / ABS alloy material is prepared.

[0041] Related performance test methods:

[0042] (1) Vicat softening temperature: tested according to the standard ASTM D1525-2017, condition B120.

[0043] (2) Gloss: sample specification: 80*40*2mm color plate, smooth surface on the front side and skin surface on the back side; color plate injection molding process: temperature 175 DEG C, speed and pressure are 50%, 65% respectively, and the mold temperature is less than or equal to 50 DEG C; the gloss of the smooth surface on the front side of the color plate is tested according to the standard ASTM D2457-2008.

[0044] Table 1: Proportion of each component (by weight fraction) and related performance test results of examples 1-11

[0045]

[0046] Table 2: Proportion of each component (by weight fraction) and related performance test results of comparative examples 1-4

[0047]

[0048] From the above results, it can be seen that the PVC / ABS alloy material of the present application can effectively improve the Vicat softening temperature of the material while facilitating the rapid and uniform replication of the mold texture by the melt in the injection molding process, so as to achieve a PVC / ABS alloy material with high Vicat softening temperature (Vicat softening temperature ≥ 80 DEG C) and high gloss (gloss ≥ 85).

Claims

1. A PVC / ABS alloy material, characterized in that, By weight parts, including the following components: PVC resin 100 parts; ABS resin 80-120 parts; Heat stabilizer 2-5 parts; Toughening agent 3-8 parts; Lubricant 0-3 parts; The ABS resin has a melt flow rate of 28-42 g / 10 min at 220 °C under a load of 10 kg, and the ABS resin has a notched Izod impact strength of 16-35 kJ / m 2 , the impact strength being tested in accordance with standard GB / T 1843-2008, under test conditions of 23 °C, a 4 mm thickness, and a type A notch sample. The toughening agent is selected from MBS type toughening agent, and the refractive index is 1.54-1.

58.

2. The PVC / ABS alloy material according to claim 1, characterized in that, The viscosity number of the PVC resin is 62-86 mL / g, and the viscosity number of the PVC resin is tested according to standard GB / T 5761-2016.

3. The PVC / ABS alloy material according to claim 1, characterized in that, The heat stabilizer is selected from organic tin stabilizer.

4. The PVC / ABS alloy material according to claim 3, characterized in that, The content of tin in the organic tin stabilizer is ≥19% by weight.

5. The PVC / ABS alloy material according to claim 3, characterized in that, The organic tin stabilizer is selected from any one or several of mercaptan methyl tin or maleic anhydride organotin.

6. The PVC / ABS alloy material according to claim 1, characterized in that, The lubricant is selected from any one or several of PE wax, oxidized polyethylene wax and ester lubricant.

7. The process for the preparation of PVC / ABS alloy materials according to any one of claims 1-6, characterized in that, Including the following steps: According to the proportion, first, the PVC resin, heat stabilizer and lubricant are added into a high-speed mixer, heated and mixed to 90-100 DEG C, then the ABS resin and toughening agent are added, mixed for 3-5 min, then the mixed powder in the high-speed mixer is discharged into a low-speed mixer, cooled to 75-80 DEG C, and then the mixed powder is discharged into the screw of the extruder for granulation, to prepare the PVC / ABS alloy material.

8. The application of the PVC / ABS alloy material according to any one of claims 1-6 in the field of electronic and electrical, household appliances.

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