An abs composition, its preparation and use

Abstract

The present application relates to the field of modified plastics, in particular to an ABS composition, a preparation method and application thereof. The ABS composition comprises the following components in parts by weight: ABS resin 67.3-97.7 parts, modifier 1-27 parts, hydrophobic agent 0.1-0.5 parts, hydrophobic synergist 1-5 parts and lubricant 0.1-1 part; the hydrophobic agent is fluorocarbon surfactant. The present application utilizes the synergistic effect of the hydrophobic agent, the hydrophobic synergist and the lubricant, so that the prepared ABS composition has better wet heat resistance, and can maintain good mechanical properties in a high temperature and high humidity environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of modified plastics, in particular to an ABS composition and a preparation method and application thereof. BACKGROUND

[0002] ABS material is a terpolymer composed of styrene, butadiene and acrylonitrile. ABS material has excellent processing performance, low-temperature resistance, electrical insulation performance and other properties, and has high dimensional stability and small molding shrinkage, and is widely used in the fields of household appliances, automobiles, electronic appliances and the like.

[0003] However, due to the double bond and other "weak bond" structures on the polymer of ABS material, water can directly react with the double bond and nitrile group in ABS material to form polar groups. In addition, water blocks oxygen, so that the polymer in ABS material tends to break more, producing polar groups, which further affects and limits the further application of ABS material, such as in the manufacture of plastic parts of cooling towers and environmental water treatment equipment.

[0004] The prior art generally improves the moisture and heat aging resistance by adding carbodiimide or polyethylene terephthalate and other organic hydrolysis-resistant agents. However, these organic hydrolysis-resistant agents are strongly alkaline, which can cause degradation of the material. And the existing research is basically focused on the moisture and heat resistance of PC / ABS alloy material, and there is little report on the moisture and heat resistance of ABS material (carbodiimide or polyethylene terephthalate and other organic hydrolysis-resistant agents are invalid for ABS system). SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide an ABS composition and a preparation method and application thereof. The ABS composition prepared by the present application has good moisture and heat resistance and can maintain good mechanical properties in a high-temperature and high-humidity environment.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows:

[0007] The first object of the present application is to provide an ABS composition comprising the following components by weight:

[0008] 67.3-97.7 parts of ABS resin, 1-27 parts of modifier, 0.1-0.5 parts of hydrophobic agent, 1-5 parts of hydrophobic synergist and 0.1-1 parts of lubricant; the hydrophobic agent is fluorocarbon surfactant.

[0009] The present invention adds a fluorocarbon surfactant and a lubricant to the ABS composition, which helps the fluorocarbon surfactant precipitate onto the surface of the composition along with the lubricant, forming a thin film on the outer surface of the ABS composition. Research has found that adding a hydrophobic synergist to a fluorocarbon surfactant system can improve the hydrophobic effect. This is presumably due to the high porosity of the hydrophobic synergist. When water droplets come into contact with the surface of the ABS composition in a high-temperature and high-humidity environment, the air trapped within the voids easily forms an air cushion, which helps reduce interfacial interactions and thus lowers the rolling angle of the ABS composition surface.

[0010] Furthermore, the present invention utilizes a fluorocarbon surfactant (which reduces the material's surface energy), a hydrophobic synergist, and a lubricant to synergize and form a protective layer on the surface of the composition, acting as a water barrier. This imparts excellent resistance to moisture and heat in the ABS composition. Since the amount of fluorocarbon surfactant, hydrophobic synergist, and lubricant added is relatively low, their impact on mechanical properties is minimal. Therefore, the addition of these three substances ensures that the ABS composition maintains excellent mechanical properties even in high-temperature and high-humidity conditions.

[0011] The present invention adopts a compound of a fluorocarbon surfactant, a hydrophobic synergist, and a lubricant to effectively improve the moisture and heat resistance and mechanical properties of the ABS composition. When these components are used in combination, their effect on improving the moisture and heat resistance of other resins is not as good as the effect of these components in ABS resin on improving the moisture and heat resistance of the ABS composition.

[0012] As a preferred embodiment of the ABS composition of the present invention, the ABS composition comprises 0.2 to 0.4 parts of a hydrophobic agent, 2 to 3 parts of a hydrophobic synergist, and 0.4 to 0.6 parts of a lubricant.

[0013] When the components in the above ABS composition are preferably in proportions by weight, the ABS composition can improve its moisture and heat resistance while retaining good mechanical properties.

[0014] As a preferred embodiment of the ABS composition of the present invention, the modifier includes at least one of a toughening agent, a flame retardant, a flame retardant synergist, and a heat-resistant agent.

[0015] The ABS composition prepared by the present invention can be applied to toughening, flame retardancy and heat-resistant systems, and has strong versatility in moisture and heat resistance.

[0016] As a preferred embodiment of the ABS composition of the present invention, the toughening agent is ABS high-rubber powder or chlorinated polyethylene; the flame retardant is at least one of a brominated flame retardant, a phosphorus flame retardant, and a phosphorus-nitrogen flame retardant; the flame retardant synergist is an antimony flame retardant synergist and / or a phosphorus flame retardant synergist; and the heat-resistant agent is at least one of α-methylstyrene, maleic anhydride, and N-phenylmaleimide.

[0017] In a preferred embodiment of the ABS composition of the present invention, the fluorocarbon surfactant comprises at least one of anionic fluorocarbon surfactants, cationic fluorocarbon surfactants, nonionic fluorocarbon surfactants, amphoteric fluorocarbon surfactants, silicon-containing fluorocarbon surfactants, hybrid surfactants, long-chain surfactants, and hydrophilic-free fluorocarbon surfactants. Preferably, the fluorocarbon surfactant comprises a fluorinated acrylic copolymer.

[0018] Fluorine is the most electronegative element in nature and is virtually inert to activation. When fluorine replaces hydrogen on a carbon chain, the bond energy increases and the bond length shortens. Fluorine-carbon bonds are very stable, and the intermolecular forces between fluorine and carbon atoms are very small. Therefore, fluorocarbon surfactants have extremely low surface energy. Fluorocarbon surfactants also exhibit excellent water repellency. Their waterproofing mechanism is to form a thin film on the outer surface of the composition. The long fluorine-containing side chains are able to stretch and align in a directional manner at the interface. Adding fluorine to ABS compositions significantly reduces the surface energy of the ABS composition, thereby exhibiting water repellency.

[0019] As a preferred embodiment of the ABS composition of the present invention, the hydrophobic synergist is two-dimensional lamellar talc.

[0020] The present invention discovered that the addition of two-dimensional lamellar talc to a fluorocarbon surfactant system can act as a hydrophobic synergist, further improving the hydrophobic effect. This is presumably due to the high porosity of talc. When water droplets come into contact with the surface of the ABS composition in a high-temperature and high-humidity environment, the air contained in the voids easily forms an air cushion, which helps reduce interfacial interactions and thus lowers the rolling angle of the ABS composition surface.

[0021] As a preferred embodiment of the ABS composition of the present invention, the lubricant is one or more of paraffin, stearic acid, butyl stearate, oleamide or ethylene bisstearamide. Preferably, the lubricant is ethylene bisstearamide.

[0022] The present invention adds a lubricant to the ABS composition, which allows the lubricant to precipitate onto the surface of the ABS composition, further blocking moisture and reducing contamination of the ABS composition by the external environment.

[0023] Preferably, the ABS resin is a terpolymer of acrylonitrile, butadiene and styrene, and is prepared by a bulk method or an emulsion method.

[0024] The second object of the present invention is to provide a method for preparing the above-mentioned ABS composition, comprising the following steps:

[0025] 1) Weigh the above components by weight;

[0026] 2) ABS resin, modifier, hydrophobic agent, hydrophobic synergist and lubricant are mixed and fed into the main feed port of a twin-screw extruder, and extruded into granules to prepare an ABS composition.

[0027] The third purpose of the present invention is to provide the use of the above-mentioned ABS composition in cooling towers and environmental water treatment equipment.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention compounds a fluorocarbon surfactant, a hydrophobic synergist, and a lubricant to produce an ABS composition having excellent resistance to moisture and heat. Furthermore, the ABS composition can maintain good mechanical properties (tensile strength retention of over 88%) in high-temperature and high-humidity environments.

[0030] 2. The moisture and heat resistance technology used in the present invention is highly versatile and can be used for dyeing ABS, toughening ABS, flame retardant ABS, filling ABS, etc.

[0031] 3. The ABS composition of the present invention has good resistance to moisture and heat and can be used in cooling towers, environmental water treatment equipment and other fields, further expanding the use scenarios of ABS materials. DETAILED DESCRIPTION

[0032] 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.

[0033] In the following examples and comparative examples, the experimental methods used are conventional methods unless otherwise specified, and the materials, reagents, etc. used are all commercially available unless otherwise specified.

[0034] The sources of raw materials for the following examples and comparative examples are as follows:

[0035] ABS resin: brand ABS D-120A, purchased from Chi Mei Company, Taiwan, China;

[0036] PC resin: brand PC2200, purchased from Sabic;

[0037] Modifier:

[0038] High-rubber powder, brand HR-181, was purchased from Kumho Petrochemical Company in South Korea;

[0039] Chlorinated polyethylene, brand CPE-132C, was purchased from Keli Chemical Co., Ltd.

[0040] Bromotriazine, brand FR-245, was purchased from Dead Sea Bromine Company, Israel;

[0041] Tetrabromobisphenol A, brand FR-1524, purchased from Dead Sea Bromine Company, Israel;

[0042] Antimony white, antimony trioxide, was purchased from Huachang Antimony Company;

[0043] N-phenylmaleimide (NPMI): brand MS-NB, purchased from Electrochemical Company;

[0044] Hydrophobic agent 1: fluorocarbon surfactant Capstone FS-3100, purchased from Chemours, USA;

[0045] Hydrophobic agent 2: polytetrafluoroethylene XY-3208, purchased from Xingyuan Chemical;

[0046] Hydrophobic synergist 1: talc TYT-777A; purchased from Haicheng Tianyuan Chemical Co., Ltd.;

[0047] Hydrophobic synergist 2: precipitated barium sulfate, purchased from Langfang Yinma;

[0048] Lubricant: Ethylene bisstearamide, purchased from Dongguan Nuojia Plastics Co., Ltd.

[0049] In each of the Examples and Comparative Examples, the hydrophobic synergist and the lubricant are the same commercially available products.

[0050] Examples 1 to 9 and Comparative Examples 1 to 6

[0051] Examples 1 to 9 and Comparative Examples 1 to 6 provide an ABS composition, the weight ratio of which is shown in Table 1. The preparation method thereof is as follows:

[0052] 1) Add ABS resin, modifier, hydrophobic agent, hydrophobic synergist and lubricant according to parts by weight into a pre-mixer and mix for 6-8 minutes to obtain a mixture;

[0053] 2) The mixed material is fed from a main feed port into a twin-screw extruder with an aspect ratio of 40:1, and is extruded into pellets after mixing, melting, and homogenization. The temperature of the twin-screw extruder is set as follows: the temperature of zone 1 is 160-210°C, the temperature of zone 2 is 170-220°C, the temperature of zone 3 is 170-230°C, and the temperatures of zones 4 to 9 are 170-240°C. The main engine speed is 250-600 rpm to produce an ABS composition.

[0054] Table 1

[0055]

[0056] The ABS compositions prepared in Examples 1 to 9 and Comparative Examples 1 to 6 were subjected to performance tests. The performance test methods are as follows:

[0057] Moisture and heat resistance and tensile strength: Tensile strength is tested according to ISO527 standard at a speed of 50mm / min; wet heat aging is tested at 85℃ 85% RH for 1000h. The tensile strength before and after aging is recorded as Ts0 and Ts 1000 , calculate the tensile strength retention rate C, C = Ts 1000 / Ts0*100%. The moisture and heat resistance of the ABS composition can be characterized by the tensile strength retention rate C. A high tensile strength retention rate C indicates good moisture and heat resistance.

[0058] The test results are shown in Table 2.

[0059] Table 2

[0060]

[0061] in conclusion:

[0062] As can be seen from the data in Table 2, the tensile strength retention rate C of the ABS composition of the present invention is 88.4%-95.1%. The high tensile strength retention rate C indicates that the prepared ABS composition has good moisture and heat resistance.

[0063] The present invention utilizes a fluorocarbon surfactant as a hydrophobic agent, two-dimensional lamellar talc as a hydrophobic synergist, and a lubricant. The synergistic effect of these three components results in an ABS composition with excellent resistance to moisture and heat. Example 1 is a dye-toughened ABS system, Example 2 is a heat-resistant ABS system, and Examples 3-4 are flame-retardant ABS systems. The resulting ABS compositions all exhibit excellent resistance to moisture and heat. This demonstrates the versatility of the ABS composition's formula in terms of moisture and heat resistance, and can be used for dyeing ABS, toughening ABS, flame-retarding ABS, filling ABS, and more.

[0064] At the same time, the ABS composition also has excellent mechanical properties under high temperature and high humidity environments, with high tensile strength and high tensile strength retention C. In particular, the ABS composition prepared in Example 4 has excellent results in terms of both moisture and heat resistance and mechanical properties.

[0065] Among them, the ABS compositions of Examples 6-7 are better than the ABS compositions of Examples 5 and 8 in terms of moisture and heat resistance and mechanical properties.

[0066] Comparative Example 6 uses polytetrafluoroethylene as a hydrophobic agent, and Example 9 uses barium sulfate, a one-dimensional filler, as a synergist. The prepared ABS composition has average moisture and heat resistance.

[0067] In Comparative Example 1, the combination of fluorocarbon surfactant, two-dimensional lamellar talc and lubricant did not improve the moisture and heat resistance of PC resin as much as the above components did in ABS resin.

[0068] In Comparative Example 2, adding 10 parts of the synergist resulted in decreased tensile strength and moisture-heat resistance. Comparative Examples 3, 4, and 5 demonstrate that the hydrophobic agent, synergist, and lubricant work together to improve the moisture-heat resistance of the composition. Removing any one of these three significantly reduces the moisture-heat resistance of the ABS composition.

[0069] 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 ABS composition, characterized in that: The composition comprises the following components in parts by weight: 67.3-97.7 parts of ABS resin, 1-27 parts of modifier, 0.1-0.5 parts of hydrophobic agent, 1-5 parts of hydrophobic synergist and 0.1-1 part of lubricant; the hydrophobic agent is a fluorocarbon surfactant; Wherein, the hydrophobic synergist is at least one of barium sulfate and two-dimensional lamellar talc.

2. The ABS composition according to claim 1, wherein 0.2-0.4 parts of hydrophobic agent, 2-3 parts of hydrophobic synergist and 0.4-0.6 parts of lubricant.

3. The ABS composition according to claim 1, wherein The modifier includes at least one of a toughening agent, a flame retardant, a flame retardant synergist, and a heat resistant agent.

4. The ABS composition according to claim 3, wherein The toughening agent is ABS high-rubber powder or chlorinated polyethylene; the flame retardant is at least one of a brominated flame retardant, a phosphorus flame retardant and a phosphorus-nitrogen flame retardant; the flame retardant synergist is an antimony flame retardant synergist and / or a phosphorus flame retardant synergist; and the heat-resistant agent is at least one of α-methylstyrene, maleic anhydride and N-phenylmaleimide.

5. The ABS composition according to claim 1, wherein The fluorocarbon surfactant includes at least one of anionic fluorocarbon surfactants, cationic fluorocarbon surfactants, nonionic fluorocarbon surfactants, amphoteric fluorocarbon surfactants, silicon-containing fluorocarbon surfactants, mixed surfactants, long-chain surfactants and hydrophilic-free fluorocarbon surfactants.

6. The ABS composition according to claim 1, wherein The hydrophobic synergist is two-dimensional lamellar talc.

7. The ABS composition according to claim 1, wherein The lubricant is one or more of paraffin, stearic acid, butyl stearate, oleamide or ethylene bisstearamide.

8. A method for preparing the ABS composition according to any one of claims 1 to 7, characterized in that: The following steps are involved: 1) Weigh the above components by weight; 2) ABS resin, modifier, hydrophobic agent, hydrophobic synergist and lubricant are mixed and fed into the main feeding port of a twin-screw extruder, and extruded into granules to prepare an ABS composition.

9. Use of the ABS composition according to any one of claims 1 to 7 in cooling towers and environmental water treatment equipment.

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