ABS (Acrylonitrile Butadiene Styrene) composite material easy to screen and preparation method and application thereof

Abstract

The invention discloses an easy-silk-screen ABS (Acrylonitrile Butadiene Styrene) composite material as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The ABS composite material comprises the following components in parts by weight: 50-95 parts of ABS resin, 5-50 parts of SAN resin, 5-15 parts of a first silk-screen modifier, 2-10 parts of a second silk-screen modifier, 5-15 parts of a flexibilizer and 1-10 parts of a filler, the first silk-screen modifying agent comprises a styrene-acrylonitrile-glycidyl methacrylate terpolymer, and the second silk-screen modifying agent comprises ABS (Acrylonitrile Butadiene Styrene) grafted maleic anhydride. By introducing the first silk-screen modifier and the second silk-screen modifier, the silk-screen performance of the ABS composite material can be improved while the mechanical property of ABS is ensured, so that the ABS composite material is suitable for silk-screen printing of different types of ink and can be used for preparing automobile exterior parts or electronic and electric appliance exterior parts.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to an easy-screen-printing ABS composite material and a preparation method and application thereof. Background Art

[0002] ABS resin is widely used in appearance parts in the fields of electronics, automobiles, etc. due to its excellent mechanical properties, good processing performance and excellent appearance. Due to the replacement of electronics, electrical appliances, etc., a large amount of recycled ABS resin has been produced, and the recycling application of recycled ABS has become a research hotspot. Recycled ABS resin is generally recycled again to prepare appearance parts in the fields of electronics, electrical appliances, automobiles, etc. These appearance parts need to form LOGO marks through silk screen ink. However, the existing ABS material is difficult to be immersed in ink, so the ink takes a long time to fully cure on the existing ABS material injection molded parts, and usually special treatment is required on the surface of the ABS material injection molded parts, such as varnish.

[0003] Therefore, there is an urgent need to develop an easy-to-screen-print ABS composite material to meet the screen printing performance requirements of ABS composite materials for appearance parts in the current electronic, electrical, and automotive fields. Summary of the invention

[0004] Based on the defects of the prior art, the purpose of the present invention is to provide an easy-to-screen-print ABS composite material and a preparation method and application thereof. By introducing a screen printing modifier, the present invention can effectively improve the screen printing performance of the composite material while ensuring the mechanical properties of ABS.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides an easy-to-screen-print ABS composite material, comprising the following components in parts by weight:

[0007] ABS resin 50-95 parts, SAN resin 5-50 parts, first screen printing modifier 5-15 parts, second screen printing modifier 2-10 parts, toughening agent 5-15 parts;

[0008] The first screen printing modifier includes styrene-acrylonitrile-glycidyl methacrylate terpolymer, and the second screen printing modifier includes ABS grafted maleic anhydride.

[0009] The inventors have discovered through research that the present invention increases the surface energy of composite material injection molded parts and improves the silk screen performance of the composite material by introducing a first silk screen modifier and a second silk screen modifier, so that the surface layer of the composite material injection molded parts can be easily penetrated by the solvent components of the ink, and at the same time, the active functional groups can react with the resin molecules of the ink to form a strong structure, thereby enhancing the bonding force between the composite material and the ink, thereby making the ink easier to solidify on the composite material injection molded parts.

[0010] The composite material of the present invention is suitable for screen printing of different types of inks and can be used to prepare automobile appearance parts or electronic and electrical appearance parts.

[0011] In the present invention, the ABS resin may be a recycled material, and may be derived from electronic and electrical appearance parts and automobile appearance parts.

[0012] In the present invention, the sum of the mass percentages of the ABS resin and the SAN resin in the ABS composite material is not less than 70%.

[0013] As a preferred embodiment of the easy-screen-printing ABS composite material of the present invention, the mass ratio of the first screen printing modifier to the second screen printing modifier is (0.5-3):1, preferably (1-2):1. The inventors have found through research that if the mass ratio of the first screen printing modifier to the second screen printing modifier is in the range of (1-2):1, the screen printing performance of the ABS composite material is better, the ABS composite material injection molded parts are more easily immersed in the solvent components of the ink, and the bonding force between the ABS composite material injection molded parts and the ink is stronger.

[0014] As a preferred embodiment of the easy-screen-printing ABS composite material of the present invention, the melt flow rate of the ABS resin at 220° C. and a load of 10 kg is 20 to 30 g / 10 min.

[0015] As a preferred embodiment of the easy-screen-printing ABS composite material of the present invention, the melt flow rate of the SAN resin at 220° C. and a load of 10 kg is 25 to 40 g / 10 min, and more preferably 30 to 35 g / 10 min.

[0016] As a preferred embodiment of the easy-screen-printing ABS composite material of the present invention, the toughening agent includes at least one of ABS high-rubber powder and methyl methacrylate-butadiene-styrene terpolymer.

[0017] As a preferred embodiment of the easy-screen-printing ABS composite material of the present invention, it includes the following components in parts by weight: 70-80 parts of ABS resin, 20-30 parts of SAN resin, 9-12 parts of a first screen-printing modifier, 6-9 parts of a second screen-printing modifier, and 10-15 parts of a toughening agent.

[0018] As a preferred embodiment of the easy-screen-printing ABS composite material of the present invention, the easy-screen-printing ABS composite material also includes the following components in parts by weight: 1 to 10 parts of filler and 0.1 to 3 parts of auxiliary agent, wherein the auxiliary agent includes at least one of an antioxidant, a lubricant, and a light stabilizer.

[0019] Further preferably, the filler includes at least one of talc, barium sulfate and kaolin.

[0020] In the present invention, the antioxidant may be at least one of a phosphite antioxidant and a hindered phenol antioxidant; the light stabilizer may be at least one of a benzotriazole light stabilizer and a hindered amine light stabilizer; the lubricant may be at least one of vinyl bisstearamide, magnesium stearate, zinc stearate, and polyethylene wax.

[0021] Based on the needs of practical applications, those skilled in the art can appropriately introduce some common auxiliary components without adversely affecting the performance of the ABS composite material, such as antioxidants to improve the aging resistance of the composition, lubricants to improve the processing performance of the composition, and light stabilizers to improve the light stability of the composition.

[0022] In a second aspect, the present invention provides a method for preparing the easy-screen printing ABS composite material as described in the first aspect, comprising the following steps:

[0023] The components are mixed and melt-extruded and granulated through a twin-screw extruder to obtain the easy-screen-printing ABS composite material.

[0024] In a third aspect, the present invention provides an application of the easy-screen-printing ABS composite material as described in the first aspect in preparing automobile appearance parts or electronic and electrical appearance parts.

[0025] The automobile accessory appearance part may be a radiator cover or an engine cover.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention introduces a first screen printing modifier and a second screen printing modifier to improve the screen printing performance of the ABS composite material while ensuring the mechanical properties of ABS, so that the ABS composite material is suitable for screen printing of different types of inks and can be used to prepare automobile appearance parts or electronic and electrical appearance parts. DETAILED DESCRIPTION

[0028] 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 and comparative examples, the purpose of which is to understand the content of the present invention in detail, rather than to limit the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative work premise belong to the protection scope of the present invention. The experimental reagents and instruments involved in the implementation of the present invention, unless otherwise specified, are all commonly used common reagents and instruments.

[0029] The source information and performance parameters of the components described in each embodiment and comparative example are shown in Table 1 below.

[0030] Table 1

[0031]

[0032]

[0033] Unless otherwise specified, the components and raw materials used in the embodiments and comparative examples of the present invention are all commercially available raw materials, and the components and raw materials used in each parallel experiment are all of the same kind.

[0034] Examples 1 to 13

[0035] The embodiments of the easy-screen-printing ABS composite material of the present invention, the components and weight proportions of the easy-screen-printing ABS composite material are shown in Table 2.

[0036] The preparation method of the easy-screen-printing ABS composite material comprises the following steps:

[0037] After mixing the components, the mixture is melt-extruded and granulated through a twin-screw extruder to obtain the easy-screen-printing ABS composite material;

[0038] During melt extrusion, the temperature zones of the twin-screw extruder from the feeding section to the die are: the temperature of zones 1 to 2 is 200-220°C, the temperature of zones 3 to 5 is 200-240°C, the temperature of zones 6 to 10 is 225-250°C, the screw speed is 300rpm, and the screw aspect ratio is 40:1.

[0039] Table 2 (Unit: parts by weight)

[0040]

[0041] Comparative Examples 1-10

[0042] The difference between the comparative examples and the embodiments is only in the types and proportions of components, as shown in Table 3.

[0043] Table 3 (Unit: weight parts)

[0044]

[0045] In order to verify the performance of the composite material of the present invention, the composite materials prepared in each embodiment and comparative example were subjected to the following performance tests, and the specific steps are as follows:

[0046] (1) Izod notched impact strength: According to ISO 180-2000 standard, the sample was injection molded into a specimen with an A-notch and tested at a temperature of 23±2°C and a humidity of 50±5%.

[0047] (2) Complete curing time of ink a on substrate: The sample was injection molded into a substrate with a thickness of 1 mm. The model of ink a was ABS black 501, and the manufacturer was Austar Ink. The curing time was 1.5 g / m 2After screen printing ink a on the substrate, the screen printing temperature is 23±2℃ and the humidity is 50±5%; the tape method is used for testing. During the test, 3M 810 tape is attached to the printed substrate, and the tape is removed to observe whether there is ink residue on the tape; the same sample is tested once every 1 hour, and each time the tape is tested in a different area on the substrate, until there is no ink residue on the tape, and the time from printing completion to test completion (no ink residue on the tape) (i.e., complete curing time) is recorded.

[0048] (3) Complete curing time of ink b on substrate: The sample was injection molded into a substrate with a thickness of 1 mm. The model of ink a was PS blue 501, and the manufacturer was Austar Ink. The curing time was 1.3 g / m 2 After screen printing the ink on the substrate, the screen printing temperature is 23±2℃ and the humidity is 50±5%; the tape method is used for testing. During the test, 3M 810 tape is attached to the printed substrate, and the tape is removed to observe whether there is ink residue on the tape; the same sample is tested once every 1 hour, and each time the tape is tested in a different area on the substrate, until there is no ink residue on the tape, and the time from printing completion to test completion (no ink residue on the tape) (i.e., complete curing time) is recorded.

[0049] The test results are shown in Tables 4 and 5.

[0050] Table 4

[0051]

[0052] Table 5

[0053]

[0054] It can be seen from Examples 1 to 13 that the present invention introduces an appropriate amount of the first screen printing modifier and an appropriate amount of the second screen printing modifier, which can effectively improve the screen printing performance of the composite material while ensuring the mechanical properties of the composite material, greatly shorten the complete curing time of the ink on the composite material injection molded part, and make the composite material of the present invention suitable for screen printing of different types of inks. The complete curing time of the ABS-501 type ink on the composite material injection molded part is not more than 8 hours, and the complete curing time of the PS-408 type ink on the composite material injection molded part is not more than 48 hours.

[0055] It can be seen from Example 1 and Comparative Examples 1-6 that the present invention uses styrene-acrylonitrile-glycidyl methacrylate terpolymer as the first screen printing modifier and styrene-acrylonitrile-butadiene-maleic anhydride terpolymer as the second screen printing modifier, which can significantly improve the screen printing performance of the composite material while ensuring the mechanical properties of the composite material, and significantly shorten the complete curing time of the ink on the composite material injection molded part.

[0056] It can be seen from Example 1 and Comparative Examples 7 to 10 that the first screen printing modifier and the second screen printing modifier in the present invention are respectively controlled within appropriate ranges, which can not only effectively improve the mechanical properties of the composite material, but also more significantly improve the screen printing performance of the composite material, and significantly shorten the complete curing time of the ink on the composite injection molded part.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. An easy-to-screen-print ABS composite material, characterized in that: The composition comprises the following components in parts by weight: ABS resin 50-95 parts, SAN resin 5-50 parts, first screen printing modifier 5-15 parts, second screen printing modifier 2-10 parts, toughening agent 5-15 parts; The first screen printing modifier includes styrene-acrylonitrile-glycidyl methacrylate terpolymer, and the second screen printing modifier includes ABS grafted maleic anhydride.

2. The easy-screen-printing ABS composite material according to claim 1, characterized in that: The mass ratio of the first screen printing modifier to the second screen printing modifier is (0.5-3):1, preferably (1-2):

1.

3. The easy-screen-printing ABS composite material according to claim 1, characterized in that: The melt flow rate of the ABS resin at 220° C. and a load of 10 kg is 20 to 30 g / 10 min.

4. The easy-screen-printing ABS composite material according to claim 1, characterized in that: The melt flow rate of the SAN resin at 220° C. and a load of 10 kg is 25 to 40 g / 10 min.

5. The easy-screen-printing ABS composite material according to claim 1, characterized in that: The toughening agent includes at least one of ABS high-rubber powder and methyl methacrylate-butadiene-styrene terpolymer.

6. The easy-screen-printing ABS composite material according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 70 to 80 parts of ABS resin, 20 to 30 parts of SAN resin, 9 to 12 parts of a first silk-screen modifier, 6 to 9 parts of a second silk-screen modifier and 10 to 15 parts of a toughening agent.

7. The easy-screen-printing ABS composite material as claimed in claim 5, characterized in that: The invention also comprises the following components in parts by weight: 1 to 10 parts of filler and 0.1 to 3 parts of auxiliary agent, wherein the auxiliary agent comprises at least one of an antioxidant, a lubricant and a light stabilizer.

8. A method for preparing the easy-screen-printing ABS composite material according to any one of claims 1 to 7, characterized in that: The following steps are involved: The components are mixed and melt-extruded and granulated through a twin-screw extruder to obtain the easy-screen-printing ABS composite material.

9. Use of the easy-screen-printing ABS composite material as claimed in any one of claims 1 to 7 in the preparation of automobile appearance parts or electronic and electrical appearance parts.

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