A screen-printable ABS composite material, a preparation method and application thereof

Abstract

The application discloses an easy-to-silk-screen ABS composite material and 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: ABS resin 50-95 parts, SAN resin 5-50 parts, a first silk-screen modifier 5-15 parts, a second silk-screen modifier 2-10 parts, a toughening agent 5-15 parts, and a filler 1-10 parts. The first silk-screen modifier comprises a styrene-acrylonitrile-glycidyl methacrylate terpolymer, and the second silk-screen modifier comprises ABS grafted maleic anhydride. The first silk-screen modifier and the second silk-screen modifier are introduced, so that the silk-screen performance of the ABS composite material is improved while the mechanical properties of the ABS are ensured, the ABS composite material is suitable for silk-screening different types of inks, and the ABS composite material can be used for preparing automobile appearance parts or electronic and electrical appearance parts.

Description

Technical Field

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

[0002] ABS resin, with its excellent mechanical properties, good processing properties, and outstanding appearance, is widely used in exterior parts for electronics, automobiles, and other fields. Due to the upgrading of electronics and other appliances, a large amount of recycled ABS resin has been produced, and the recycling of recycled ABS has become a research hotspot. Recycled ABS resin is generally recycled and used again to make exterior parts for electronics, automobiles, and other fields. These exterior parts require the use of silk-screen ink to form logos. However, existing ABS materials are difficult to penetrate with ink, resulting in a long time for the ink to fully cure on existing ABS injection-molded parts. Special surface treatment, such as varnish, is usually required.

[0003] Therefore, there is an urgent need to develop an easy-to-screen-print ABS composite material to meet the current screen printing performance requirements of ABS composite materials for appearance parts in the fields of electronics, automobiles, etc. Summary of the Invention

[0004] Based on the defects of the existing technology, the purpose of the present invention is to provide an easy-to-screen-print ABS composite material and its preparation method and application. 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] 50-95 parts of ABS resin, 5-50 parts of SAN resin, 5-15 parts of first screen printing modifier, 2-10 parts of second screen printing modifier, 5-15 parts of toughening agent;

[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 immersed by the solvent components of the ink. 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 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 easily screen-printable ABS composite material of the present invention, the mass ratio of the first screen-printable modifier to the second screen-printable modifier is (0.5-3):1, preferably (1-2):1. The inventors have found that when the mass ratio of the first screen-printable modifier to the second screen-printable modifier is within the range of (1-2):1, the screen-printable performance of the ABS composite material is improved, the solvent components of the ink are more easily absorbed by the ABS composite injection molded parts, and the bonding strength between the ABS composite 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 further 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] More 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; and 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 may 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 a use 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 automotive 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, making the ABS composite material suitable for screen printing different types of inks and capable of being used to prepare automotive exterior parts or electronic and electrical appliance exterior 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. Its purpose 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 all fall within the protection scope of the present invention. The experimental reagents and instruments involved in the implementation of the present invention are all conventional common reagents and instruments unless otherwise specified.

[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 examples 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] An embodiment of the easy-screen-printing ABS composite material of the present invention, the components and weight ratios 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] The components are mixed and 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 head 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 examples is only in the types and proportions of the components, as shown in Table 3.

[0043] Table 3 (Unit: parts by weight)

[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. The specific steps are as follows:

[0046] (1) Izod notched impact strength: According to ISO 180-2000, 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. 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. After the tape is removed, it is observed whether there is ink residue on the tape. The same sample is tested once every 1 hour, and the area of ​​the tape attached to the substrate is different each time until there is no ink residue on the tape. The time from the completion of printing to the completion of the test (no ink residue on the tape) (i.e., the 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. After the tape is removed, observe whether there is any ink residue on the tape. The same sample is tested every 1 hour, and the area of ​​the tape attached to the substrate is different each time until there is no ink residue on the tape. The time from the completion of printing to the completion of the test (no ink residue on the tape) (i.e., the 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] As can be seen from Examples 1 to 13, 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 different types of inks. The complete curing time of the ABS-501 type ink on the composite material injection-molded part is no more than 8 hours, and the complete curing time of the PS-408 type ink on the composite material injection-molded part is no more than 48 hours.

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

[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 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. An easy-to-screen-print ABS composite material, characterized in that: The composition comprises the following components in parts by weight: 50-95 parts of ABS resin, 5-50 parts of SAN resin, 5-15 parts of first screen printing modifier, 2-10 parts of second screen printing modifier, 5-15 parts of toughening agent; 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.

3. 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 (1~2):

1.

4. 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 20-30 g / 10 min.

5. 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 25-40 g / 10 min.

6. 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.

7. The easy-screen-printing ABS composite material according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 70-80 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.

8. The easy-screen-printing ABS composite material according to claim 1, wherein: The invention 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.

9. A method for preparing the easy-screen printing ABS composite material according to any one of claims 1 to 8, 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.

10. Use of the easy-screen-printing ABS composite material according to any one of claims 1 to 8 in preparing automotive exterior parts or electronic and electrical appliance exterior parts.

Images