A low-odor, low-emission, high-weather-resistant PC / ABS resin alloy and preparation method thereof

Abstract

The present invention relates to a low-odor, low-emission, and highly weather-resistant PC / ABS resin alloy and a preparation method thereof, comprising PC resin, ABS resin, SMMA resin, and grafted SAN resin. The present invention can simultaneously give the PC / ABS resin alloy the characteristics of low odor, low emission, and high weather resistance by introducing SMMA resin and grafted SAN resin, and is particularly suitable for application in automotive interiors, household appliances, and other components.

Description

Technical Field

[0001] The invention belongs to the field of modified plastics, and particularly relates to a low-odor, low-emission and highly weather-resistant PC / ABS resin alloy and a preparation method thereof. Background Art

[0002] PC resin is colorless and transparent, with excellent heat resistance, high strength and impact resistance, and stable dimensions. It is a widely used engineering plastic. ABS resin is a copolymer of acrylonitrile-butadiene-styrene. Since ABS resin coordinates the superior properties of the three components, it has excellent impact strength, good processing properties and chemical stability, is easy to mold, and the products are glossy, tough and flexible, with excellent comprehensive performance. PC / ABS resin alloy combines the advantages of each component resin and is widely used in the automotive industry, electronic and electrical industry, light industry and household appliances, textiles and construction industries with its excellent comprehensive performance.

[0003] In other fields such as automotive interiors and home appliances, low-odor and low-emission materials are always important topics, and weather resistance requirements are also important technical indicators to ensure the long-term service of products. It is of great significance to develop PC / ABS resin alloys that have both low-odor, low-emission and high weather resistance properties. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a low-odor, low-emission and highly weather-resistant PC / ABS resin alloy and a preparation method thereof. By introducing SMMA resin and grafted SAN resin, the PC / ABS resin alloy can be simultaneously endowed with the characteristics of low odor, low emission and high weather resistance, and is particularly suitable for application in components such as automotive interiors and household appliances.

[0005] The present invention provides a low-odor, low-emission, and highly weather-resistant PC / ABS resin alloy, which comprises the following components in parts by weight:

[0006]

[0007] The PC resin has a melt mass flow rate of 3 to 30 g / 10 min under the conditions of 300° C.×1.2 kg (ISO 1133-2011).

[0008] The melt mass flow rate of the ABS resin under the conditions of 220° C.×10 kg (ISO 1133-2011) is 5 to 20 g / 10 min.

[0009] The SMMA resin is a copolymer of styrene and methyl methacrylate, wherein the weight content of methyl methacrylate is 50-75%.

[0010] The grafted SAN resin is a glycidyl methacrylate grafted SAN copolymer, wherein the grafted content of glycidyl methacrylate is 2-8%.

[0011] The resin alloy further includes 1-2 parts of toner, which is carbon powder.

[0012] Preferably, the following components are included by weight:

[0013]

[0014] The present invention also provides a method for preparing a low-odor, low-emission, and highly weather-resistant PC / ABS resin alloy, comprising the following steps:

[0015] The raw materials are mixed evenly according to the ratio, and then added into a twin-screw extruder, and granulated by melt blending and extrusion; wherein, the temperature control sections of the main barrel are 200°C, 205°C, 210°C, 215°C, 220°C, 230°C, 235°C, 245°C, 250°C, 245°C, and the twin-screw speed is 500-600 rpm.

[0016] The present invention also provides a low-odor, low-emission, and highly weather-resistant PC / ABS resin alloy for use in automobile interior armrests, auxiliary instrument panels, and home appliance housings.

[0017] Beneficial Effects

[0018] The present invention can simultaneously give the PC / ABS resin alloy the characteristics of low odor, low emission and high weather resistance by introducing SMMA resin and grafted SAN resin. Among them, SMMA resin can greatly reduce the shear degradation of PC / ABS alloy during processing, and the addition of grafted SAN resin can connect the partially degraded molecular chains, thereby reducing the low molecular volatiles in the final product. In addition, SMMA resin has very excellent fluidity and is easily distributed on the surface of the injection molded product, protecting the PC / ABS resin alloy from light-induced aging, so that the material has the characteristics of low odor, low emission and high weather resistance. At the same time, the resin alloy has excellent mechanical properties and processing properties; the preparation process is simple, the equipment requirements are low, it is suitable for industrial production, and can be widely used in the fields of automotive interiors and home appliances. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0020] Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the art.

[0021] The raw materials used in the following examples and comparative examples are as follows:

[0022] PC resin 1, ISO 1133-2011 standard, melt mass flow rate at 300℃×1.2kg is 10g / 10min, Japan Idemitsu, brand PC FN2200;

[0023] PC resin 2, ISO 1133-2011 standard, melt mass flow rate at 300°C×1.2kg is 35g / 10min, Mitsubishi, Japan, brand PC H-3000F;

[0024] ABS resin 1, ISO 1133-2011 standard, melt mass flow rate at 220°C×10kg is 16g / 10min, Shanghai Gaoqiao Petrochemical, brand ABS 8434;

[0025] ABS resin 2, ISO 1133-2011 standard, melt mass flow rate at 220°C×10kg is 29g / 10min, Shanghai Gaoqiao Petrochemical, brand ABS 8391;

[0026] SMMA resin 1, MMA content is 50%, Nippon Steel & Sumitomo Metal Corporation, brand MS-500;

[0027] SMMA resin 2, MMA content 60%, Nippon Steel & Sumitomo Metal Corporation, brand MS-600;

[0028] SMMA resin 3, MMA content is 75%, Nippon Steel & Sumitomo Metal, brand MS-750;

[0029] SMMA resin 4, MMA content is 30%, Nippon Steel & Sumitomo Metal Corporation, brand MS-300;

[0030] Grafted SAN resin 1, GMA grafting content is 2%, Jiayirong, brand SAG-002;

[0031] Grafted SAN resin 2, GMA grafting content is 5%, Jiayirong, brand SAG-005;

[0032] Grafted SAN resin 3, GMA grafting content is 8%, Jiayirong, brand SAG-008;

[0033] SAN resin, Tianjin Dagu Petrochemical, brand DG-AS106.

[0034] For the convenience of comparison, 1% carbon black produced by Cabot with the brand number M717 was added to all the embodiments and comparative examples.

[0035] The composite materials of each embodiment and comparative example were prepared by the following process:

[0036] According to the ratio, the raw materials are mixed evenly, and then added into a twin-screw extruder (the screw diameter is 35 mm, the length-to-diameter ratio L / D=48:1), and granulated by melt blending and extrusion; wherein, the temperature control of each section of the main barrel (from the feed port to the die outlet) is 200°C, 205°C, 210°C, 215°C, 220°C, 230°C, 235°C, 245°C, 250°C, 245°C, and the twin-screw speed is 500-600 rpm.

[0037] The embodiments and comparative examples were subjected to the following test methods or test standards:

[0038] After the product was dried in a blast oven at 80°C for 4 hours, it was injection molded into standard specimens and 50mm*80mm*2mm sample plates using a plastic injection molding machine at an injection molding temperature of 250°C; the injection-molded specimens and sample plates were placed at a relative humidity of 50% and 23°C for at least 24 hours before performance testing.

[0039] The product performance test method is as follows:

[0040] Charpy impact strength, tested according to ISO 179-2010;

[0041] Flexural modulus, tested according to ISO 178-2010 standard 2mm / min;

[0042] Melt index is tested according to ISO 1133-2011 standard at 260℃*5Kg; odor test is tested according to PV3900 standard at 80℃, 2h; organic emission total carbon TVOC test is tested according to PV 3341 standard;

[0043] Weathering test, tested according to PV1303 standard, five cycles;

[0044] Color difference △E, tested using Leica colorimeter;

[0045] For color fastness, compare with a standard comparison card and judge the grade under D65 light source.

[0046] Table 1 Example composition formula (weight parts)

[0047]

[0048] Table 2 Comparative Example Composition Formula (parts by weight)

[0049]

[0050] Table 3 Performance test results of the embodiment

[0051]

[0052] Table 4 Comparative Example Performance Test Results

[0053]

[0054]

[0055] It can be seen from Table 3 and Table 4 that the present invention can greatly reduce the shear degradation of PC / ABS alloy during processing by introducing SMMA resin. For SMMA resin, if the MMA content is too low, it will not play a good role in improving the weather resistance of PC / ABS alloy. On the contrary, if the MMA content is too high, it will not have a significant effect on the odor and emission of PC / ABS alloy. The addition of grafted SAN resin can connect partially degraded molecular chains. Too high grafted SAN resin content is easy to cause PC / ABS alloy reaction cross-linking, increase the degradation caused by shear during processing, and is not conducive to reducing odor and emission. Too low content will not play the role of linking broken PC molecular weight. The appropriate addition amount reduces the low molecular volatiles in the final product, and SMMA resin has very excellent fluidity, which is easy to distribute on the surface of the injection molded product to protect the PC / ABS resin alloy from light aging. The above factors make the resin alloy have the characteristics of low odor, low emission and high weather resistance at the same time, and the odor level can reach 3-3.5, and the weather-resistant PV1303 five-cycle color difference does not exceed 1.31. It is suitable for use in automotive interiors and home appliances.

Claims

1. A low-odor, low-emission, and highly weather-resistant PC / ABS resin alloy, characterized in that: In parts by weight, it comprises the following components: The grafted SAN resin is a grafted copolymer containing epoxy functional groups; the SMMA resin is a copolymer of styrene and methyl methacrylate, wherein the weight content of methyl methacrylate is 50-75%; and the grafted SAN resin is a glycidyl methacrylate grafted SAN copolymer.

2. The PC / ABS resin alloy according to claim 1, characterized in that: The PC resin has a melt mass flow rate of 3 to 30 g / 10 min at 300° C.×1.2 kg.

3. The PC / ABS resin alloy according to claim 1, characterized in that: The melt mass flow rate of the ABS resin under the condition of 220° C.×10 kg is 5 to 20 g / 10 min.

4. The PC / ABS resin alloy according to claim 1, characterized in that: The graft content of glycidyl methacrylate in the glycidyl methacrylate grafted SAN copolymer is 2-8 wt %.

5. The PC / ABS resin alloy according to claim 1, characterized in that: The resin alloy also includes 1-2 parts of color powder.

6. The PC / ABS resin alloy according to claim 1, characterized in that: In parts by weight, it comprises the following components:

7. A method for preparing a low-odor, low-emission, and highly weather-resistant PC / ABS resin alloy as claimed in any one of claims 1 to 6, comprising the following steps: The raw materials are mixed evenly according to the ratio, and then added into a twin-screw extruder, and granulated by melt blending and extrusion; wherein, The controlled temperatures of each section of the main barrel are 200°C, 205°C, 210°C, 215°C, 220°C, 230°C, 235°C, 245°C, 250°C, and 245°C, respectively, and the speed of the twin screw is 500-600 rpm.

8. Use of the low-odor, low-emission, and highly weather-resistant PC / ABS resin alloy as claimed in any one of claims 1 to 6 in automobile interiors and household appliances.

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