An abs composition, its preparation and use

Abstract

The present application relates to a kind of ABS compositions and its preparation method and application, component includes: ABS resin, impact modifier, modifier.The low temperature impact strength of the ABS composition of the present application is better maintained, and the color difference is controlled within 3.0.

Description

Technical Field

[0001] The present invention belongs to the field of plastic processing, and in particular relates to an ABS composition, a preparation method and an application thereof. Background Art

[0002] Acrylonitrile-butadiene-styrene copolymer (ABS) is a thermoplastic engineering plastic with excellent mechanical properties and easy processing, widely used in home appliances, automobiles, electronics, and other fields. However, the carbon-carbon double bonds in the ABS molecule are damaged by light exposure over long-term outdoor use, resulting in a loss of low-temperature toughness and failure to meet application requirements. The industry typically uses large amounts of UV absorbers and hindered amine light stabilizers to improve light aging resistance, but this improvement is inefficient and limited. Summary of the Invention

[0003] In view of the defects of the prior art, the technical problem to be solved by the present invention is to provide an ABS composition and a preparation method and application thereof.

[0004] The ABS composition of the present invention comprises, by weight:

[0005] ABS resin 70-90 parts;

[0006] 5-20 parts of impact modifier;

[0007] 2-11 parts of improver;

[0008] The improver is a mixture of a transition agent and a dissipative agent; the transition agent is a metal oxide with semiconductor properties, and its band gap width is 3.5-4.0eV; the dissipative agent is a metal oxide with semiconductor properties, and its band gap width is

[0009] The inventors speculate that this may be due to the energy transition and dissipation between the two metal oxides with different band gap widths, which can prevent the ultraviolet light energy from being directly absorbed by the polymer, thereby playing a role in protecting the polymer.

[0010] Preferably, the impact modifier is a grafted rubber with a core-shell structure; the grafted rubber with a core-shell structure has polybutadiene, polybutyl acrylate, EPDM rubber or silicone rubber as the core and acrylonitrile-styrene, methyl methacrylate-styrene or methyl methacrylate chain segments as the shell.

[0011] Preferably, the transition agent is one or more of tin dioxide, nickel oxide, indium tin oxide, and antimony tin oxide.

[0012] Preferably, the dissipative agent is one or more of titanium dioxide, zinc oxide, and antimony trioxide.

[0013] Preferably, the mass ratio of the dissipating agent and the transition agent is (20-50):1.

[0014] Further preferably, the mass ratio of the dissipating agent and the transition agent is (25-35):1.

[0015] Preferably, the component further contains 0.2-2 parts of an auxiliary agent; the auxiliary agent is one or several of an antioxidant, a weathering agent, a colorant.

[0016] Preferably, the antioxidant is one or several of a hindered phenol antioxidant (such as tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid octadecyl ester), a phosphite antioxidant (such as tris[2,4-di-tert-butylphenyl]phosphite, bis2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite), a sulfide antioxidant (such as pentaerythritol tetrakis(3-laurylthiopropionate), dioctadecyl 3,3'-thiobispropionate). Phenyl ) Propionic acid Preferably, the weathering agent is one or several of a benzophenone ultraviolet light absorber (such as 2-hydroxy-4-n-octyloxybenzophenone), a benzotriazole ultraviolet light absorber (such as 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-bis(a,a-dimethylbenzyl)phenyl)benzotriazole), a hindered amine (such as bis(2,2,6,6-tetramethylpiperidyl)sebacate, poly[[6-[(1,1,3,3-tetramethylbutyl)amino]-s-triazine-2,4-diyl][(2,2,6,6-tetramethyl-4-piperidyl)imino]]hexamethylphenoxy)imino].

[0017] Preferably, the component contains, in parts by weight:

[0018] ABS resin 75-85 parts;

[0019] impact modifier 8-15 parts;

[0020] improving agent 5-10 parts.

[0021] A method for preparing the ABS composition of the present application comprises:

[0022] The components are weighed according to the weight ratio, mixed, and then added to the main feeding port of a twin-screw extruder, melted, extruded, and granulated to obtain the ABS composition.

[0023] Preferably, the extrusion temperature is 160-220°C, and the screw rotation speed is 200-800 rpm.

[0024] The ABS composition of the present application is applied in the fields of household appliances, automobiles or electronic and electrical appliances, such as air conditioner shell, automobile grating, switch panel and the like.

[0025] Beneficial effects

[0026] The present application utilizes the band gap difference between semiconductor metal oxides, and the electronic transition is generated by the metal oxide with wider band gap (3.5-4.0 eV) absorbing ultraviolet light; the energy released by the electronic back transition is absorbed by the metal oxide with narrower band gap (3.0-3.2 eV) and finally dissipated into heat energy; thus the protection of the base polymer ABS resin is realized. The weather resistance improvement of the above method is more efficient and economical than the traditional ultraviolet light absorbers and hindered amine light stabilizers.

[0027] The low-temperature impact strength of the ABS composition of the present application is well maintained, and the color difference is controlled within 3.0. DETAILED DESCRIPTION

[0028] The present application will be further described in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present application and not used to limit the scope of the present application. Furthermore, it should be understood that after reading the content taught by the present application, those skilled in the art can make various modifications or changes to the present application, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0029] I. Raw material sources

[0030] ABS resin: 121H, LG Chemical;

[0031] Impact modifier-1: MAG-50, core-shell graft with polybutadiene as core and styrene-acrylonitrile segment as shell, Benzene;

[0032] Impact modifier-2: E700N, core-shell graft with ethylene-propylene-diene rubber as core and styrene-acrylonitrile segment as shell, Japan UMG;

[0033] Transition agent-1: tin dioxide, band gap width 3.5 eV, Shandong Xujie Chemical Industry;

[0034] Transition agent-2: indium tin oxide, band gap width 4.0 eV, Shandong Xibaiyi Metal Material Co., Ltd.;

[0035] Dissipation agent-1: titanium dioxide, R103, band gap width 3.2 eV, DuPont;

[0036] Dissipation agent-2: antimony trioxide, band gap width 3.0 eV, Shanghai Yinjiang Chemical Industry;

[0037] The mass ratio of improver-1, dissipative agent-1 and transition agent-1 is 25:1;

[0038] The mass ratio of improver-2: dissipative agent-1 and transition agent-2 is 25:1;

[0039] The mass ratio of improver-3, dissipative agent-2 and transition agent-1 is 25:1;

[0040] The mass ratio of improver-4, dissipative agent-1 and transition agent-1 is 35:1;

[0041] The mass ratio of improver-5, dissipative agent-1 and transition agent-1 is 20:1;

[0042] The mass ratio of improver-6, dissipative agent-1 and transition agent-1 is 50:1;

[0043] Additives: a compound of antioxidants tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester and pentaerythritol tetrakis(3-laurylthiopropionate), with a mass ratio of 1:1.

[0044] The auxiliary agent in the parallel examples and comparative examples is the same commercially available product.

[0045] 2. Preparation methods of examples and comparative examples

[0046] The components were weighed according to weight ratio, mixed and added to the main feed port of a twin-screw extruder, melted, extruded and granulated to obtain an ABS composition; wherein the temperatures of zones 1-10 of the twin-screw extruder were 160°C, 200°C, 210°C, 210°C, 210°C, 220°C, 220°C, 220°C, and 210°C, and the screw speed was 400 rpm.

[0047] 3. Test standards and methods

[0048] Izod notched impact strength: tested according to ISO 180-2019 method, 1A notch, test temperature: -40°C. Weathering test was conducted according to ISO 4892-2-2013 method A cycle 1. After aging for 500 hours, the color difference was tested using an X-Rite 7000A colorimeter, and the Izod notched impact strength was tested using a ZWICK 5.5P pendulum impact tester.

[0049] Table 1 Proportions of the embodiments (parts by weight)

[0050]

[0051]

[0052] Table 2 is the ratio of the comparative example (parts by weight)

[0053] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 ABS resin 80 80 80 80 Impact Modifier-1 10 10 10 10 Improver-1 0.5 25 Transition Agent-1 8 Dispersant-1 8 additives 0.2 0.2 0.2 0.2

[0054] Table 3 is the performance effect data of Examples

[0055]

[0056]

[0057] Table 4 is the performance effect data of Comparative Examples

[0058] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 <![CDATA[-40度缺口冲击强度(kJ / m 2 )]]> 21.1 19.8 22.3 16.8 <![CDATA[老化后的-40度缺口冲击强度(kJ / m 2 )]]> 13.7 12.1 14.2 11.8 Impact strength retention after aging (%) 64.9 61.1 63.7 70.2 Photoaging color difference 7.9 9.1 7.5 3.1

[0059] From Examples 1-9 and Comparative Examples 1-2, it can be seen that the transition agent and the dissipating agent are in a suitable ratio, the energy of the ultraviolet light is absorbed by the transition agent, and the energy is dissipated into heat by the dissipating agent, thereby playing a protective role on the composition, and the low-temperature impact strength of the ABS composition is well maintained, and the color difference is controlled within 3.5.

[0060] From Examples 1 and Comparative Examples 3-4, it can be seen that the addition amount of the improvement agent is too low, which will greatly increase the color difference of the composition after aging (Comparative Example 3); and the addition amount of the improvement agent is too high, which will significantly lower the low-temperature impact strength of the composition (Comparative Example 4).

Claims

1. An ABS composition, characterized in that: In parts by weight, the components include: ABS resin 70-90 parts; 5-20 parts of impact modifier; 2-11 parts of improver; The improver is a mixture of a transition agent and a dissipative agent; the transition agent is a metal oxide with semiconductor properties, wherein the band gap is 3.5-4.0 eV; the dissipative agent is a metal oxide with semiconductor properties, wherein the band gap is 3.0-3.2 eV; the transition agent is one or more of tin dioxide, nickel oxide, indium tin oxide, and antimony tin oxide; the dissipative agent is one or more of titanium dioxide, zinc oxide, and antimony trioxide; the mass ratio of the dissipative agent to the transition agent is (25-35):

1.

2. The ABS composition according to claim 1, characterized in that: The impact modifier is a grafted rubber with a core-shell structure.

3. The ABS composition according to claim 1, characterized in that: The components also contain 0.2-2 parts of auxiliary agents; the auxiliary agents are one or more of antioxidants, weathering agents, and colorants.

4. The ABS composition according to claim 1, characterized in that: In parts by weight, the components include: ABS resin 75-85 parts; 8-15 parts of impact modifier; 5-10 parts of improver.

5. A method for preparing the ABS composition according to claim 1, comprising: Weigh each component according to the weight ratio, mix them and add them to the main feed port of the twin-screw extruder, melt, extrude and granulate to obtain ABS composition.

6. Use of the ABS composition according to claim 1 in the fields of home appliances, automobiles, or electronic and electrical appliances.

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