Polyarylene sulfide resin composition as well as preparation method and application thereof

Abstract

The invention relates to a polyarylene sulfide resin composition as well as a preparation method and application thereof. The polyarylene sulfide resin composition is prepared from the following components in percentage by weight: 25%-28% of PPS resin, 3%-5% of high-temperature-resistant amorphous resin, 64%-75% of silicon dioxide, 0-0.5% of a silane coupling agent and 0-0.5% of a coloring agent. The linear expansion coefficient of the composite material is effectively reduced by filling the silicon dioxide, and the linear expansion coefficient of the material at high temperature is further reduced by adding the high-temperature-resistant high-toughness amorphous resin, so that the polyarylene sulfide resin composition has low linear expansion coefficient, high toughness and good processability.

Description

Technical Field

[0001] The present invention relates to the technical field of special engineering plastics, and particularly relates to a polyarylene sulfide resin composition, a preparation method thereof, and an application thereof. Background Art

[0002] Polyarylene sulfide resin is a class of high-performance polymer materials with excellent properties, and its main chain is composed of alternating sulfur ether and aryl structures. This unique molecular structure endows polyarylene sulfide resin with a series of remarkable characteristics, including high temperature resistance, corrosion resistance, radiation resistance, flame retardancy, balanced physical and mechanical properties, and excellent dimensional stability. Polyphenylene sulfide (PPS), as a representative product of polyarylene sulfide resins, is known as a special engineering plastic. PPS is a crystalline polymer, which has high heat resistance, mechanical properties, chemical resistance, dimensional stability, flame retardancy, and good electrical properties. It is used as materials for electrical / electronic equipment components, automotive equipment components, chemical equipment components, etc., especially for applications with high ambient temperatures. However, since the glass transition temperature of PPS is not very high, when used at high temperatures, the dimensional stability and rigidity of the molded product will be greatly reduced. For example, the patent with publication number CN116601222A discloses a polyarylene sulfide resin composition, a molded product and an optical ferrule manufactured using the polyarylene sulfide resin composition. The polyarylene sulfide resin composition contains a polyarylene sulfide resin and silica particles. The polyarylene sulfide resin composition provides a molded product with excellent toughness. In the polyarylene sulfide resin composition containing a polyarylene sulfide resin and silica particles, a polyarylene sulfide resin with a melt viscosity of 35-80 Pa·s and silica particles with a small content of coarse powder with a particle size of 45 μm or more are used in specified amounts respectively.

[0003] For molding materials such as optical ferrules or connectors, excellent dimensional stability, mechanical properties, flame retardancy, etc. are required. With the development of 5G communication and big data, the amount of communication information is increasing day by day. Therefore, in order to cope with the increasing amount of information communication, the number of optical fibers, that is, the core number, in the optical ferrule increases. The multi-core of the optical ferrule will cause deficiencies such as embrittlement of the optical ferrule and poor dimensional stability at high temperatures when the processed optical ferrule is assembled into the adapter. In such a situation, for the polyarylene sulfide resin composition, it is required to further increase the filler to improve the dimensional stability. However, with the increase of the filler, the material is prone to problems such as embrittlement and poor toughness. Summary of the Invention

[0004] Based on this, the object of the present invention is to provide a polyarylene sulfide resin composition, a preparation method thereof, and an application thereof. The polyarylene sulfide resin composition has a low linear expansion coefficient and high toughness, and can be applied to the manufacture of communication components, such as optical fiber connector ferrules, optical ferrules, optical pick-up unit components, laser diode components, and photoelectric sensor components, etc.

[0005] To achieve the above object, the present invention adopts the following technical solutions: The present invention first provides a polyarylene sulfide resin composition, which is prepared from the following components by weight percentage: 25%-28% of PPS resin, 3%-5% of high-temperature resistant amorphous resin, 64%-75% of silicon dioxide, 0-0.5% of silane coupling agent, and 0-0.5% of colorant.

[0006] As a further improvement of the above solution of the present invention, the high-temperature resistant amorphous resin is polyetherimide or polyethersulfone.

[0007] As a further improvement of the above solution of the present invention, the particle size of the silicon dioxide is 0.4-10 μm.

[0008] As a further improvement of the above solution of the present invention, the melt index of the PPS resin at 315 °C is 100-1500 g / 10 min.

[0009] As a further improvement of the above solution of the present invention, the silane coupling agent is a silane coupling agent.

[0010] As a further improvement of the above solution of the present invention, the colorant is carbon black.

[0011] The present invention also provides a method for preparing the polyarylene sulfide resin composition as described above, which includes the following steps: proportionally mixing the PPS resin, high-temperature resistant amorphous resin, silicon dioxide, silane coupling agent, and colorant evenly, feeding them from the main feed port of the extruder, and performing melt extrusion and pelletizing to obtain the polyarylene sulfide resin composition.

[0012] As a further improvement of the above solution of the present invention, the temperature zones of the extruder are set as follows: zone 1 at 150 °C, zone 2 at 320 °C, zone 3 at 320 °C, zone 4 at 310 °C, zone 5 at 300 °C, zone 6 at 300 °C, zone 7 at 290 °C, zone 8 at 290 °C, zone 9 at 290 °C, zone 10 at 290 °C; the screw speed is 280 rpm, and the screw length-diameter ratio is 40:1.

[0013] The present invention also provides an application of the polyarylene sulfide resin composition as described above in the preparation of optical communication parts.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The polyarylene sulfide resin composition of the present invention effectively reduces the linear expansion coefficient of the composite material by filling silicon dioxide, and further reduces the linear expansion coefficient of the material at high temperatures by adding a high-temperature resistant and high-toughness amorphous resin, so that the polyarylene sulfide resin composition has a low linear expansion coefficient, high toughness and good processability.

[0015] 2. In the polyarylene sulfide resin composition of the present invention, the silica filling reaches 64% - 75%, and molded articles with quite high dimensional accuracy can be prepared, which are suitable for manufacturing precision mechanical parts, especially optical communication parts used in the field of optical communication, such as optical fiber connector ferrules and sleeves, optical pickup parts, laser diode parts, and photoelectric sensor parts. Detailed Embodiments

[0016] For the convenience of understanding the present invention, the present invention will be described more comprehensively below in combination with specific embodiments. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0018] The specific information of the raw materials used in the following examples and comparative examples is as follows: PPS Resin 1: Grade GAC02, produced by Chongqing Jushi, with a melt index (MFR 315°C 5Kg) of 150 g / 10 min; PPS Resin 2: Grade GAC09, produced by Chongqing Jushi, with a melt index (MFR 315°C 5Kg) of 1300 g / 10 min; High-temperature amorphous resin 1: Polyarylene sulfide (PEI), ULTEM - 1000 of Sabic; High-temperature amorphous resin 2: Polyethersulfone (PES), 3600P of Sumitomo Chemical; Silica 1: Grade Q015, with a particle size D50 of 0.5 μm, produced by Suzhou JinYi; Silica 2: Grade Q105, with a particle size D50 of 5 μm, produced by Suzhou JinYi; Silane coupling agent: Shin-Etsu KBE 903; Colorant: Carbon black 750B produced by Mitsubishi Chemical.

[0019] All of the above materials are commercially available conventional and commonly used products.

[0020] It can be understood that the above raw material reagents are only examples of some specific embodiments of the present invention to make the technical solution of the present invention clearer, and do not represent that the present invention can only use the above reagents. Specifically, it shall be subject to the scope in the claims.

[0021] Any range described in the present invention includes the end values, any numerical values between the end values, and any sub-ranges formed by any numerical values between the end values or the end values.

[0022] Example 1 This example provides a polyarylene sulfide resin composition, which comprises the following component raw materials by weight percentage: 6.6% of PPS resin 1, 18.4% of PPS resin 2, 21% of silica 1, 51% of silica 2, 3% of amorphous high-temperature resistant resin 1, 0.4% of silane coupling agent, and 0.2% of colorant.

[0023] The preparation method of the polyarylene sulfide resin composition in this example includes the following steps: proportionally put PPS resin 1, PPS resin 2, high-temperature resistant amorphous resin 1, silica 1, silica 2, silane coupling agent, and colorant into a high-speed mixer, mix them evenly, and then feed them into a Coperion STS35 twin-screw extruder from the main feeding port for melt blending extrusion and pelletizing to obtain the polyarylene sulfide resin composition. Among them, the temperature zones of the twin-screw extruder are set as follows: zone 1 at 150 °C, zone 2 at 320 °C, zone 3 at 320 °C, zone 4 at 310 °C, zone 5 at 300 °C, zone 6 at 300 °C, zone 7 at 290 °C, zone 8 at 290 °C, zone 9 at 290 °C, zone 10 at 290 °C; the screw speed of the twin-screw extruder is 280 rpm, and the screw length-diameter ratio is 40:1.

[0024] Example 2 This example adopts the same implementation method as Example 1. The difference from Example 1 is that the polyarylene sulfide resin composition in this example comprises the following component raw materials by weight percentage: 6.6% of PPS resin 1, 18.4% of PPS resin 2, 21% of silica 1, 51% of silica 2, 3% of amorphous high-temperature resistant resin 2, 0.4% of silane coupling agent, and 0.2% of colorant.

[0025] Example 3 This example adopts the same implementation method as Example 1. The difference from Example 1 is that the polyarylene sulfide resin composition in this example comprises the following component raw materials by weight percentage: 6.6% of PPS resin 1, 20.8% of PPS resin 2, 20% of silica 1, 44% of silica 2, 4% of amorphous high-temperature resistant resin 1, 0.3% of silane coupling agent, and 0.3% of colorant.

[0026] Example 4 This example uses the same implementation method as Example 1. The difference from Example 1 is that the polyarylene sulfide resin composition of this example contains the following component raw materials by weight percentage: 7.2% of PPS resin 1, 20.8% of PPS resin 2, 30% of silica 1, 45% of silica 2, 5% of amorphous high-temperature resistant resin 2, 0.5% of silane coupling agent, and 0.5% of colorant.

[0027] Comparative Example 1 This comparative example uses the same implementation method as Example 1. The difference from Example 1 is that the polyarylene sulfide resin composition of this comparative example contains the following component raw materials by weight percentage: 6.6% of PPS resin 1, 20.8% of PPS resin 2, 21% of silica 1, 51% of silica 2, 0.4% of silane coupling agent, and 0.2% of colorant.

[0028] Comparative Example 2 This comparative example uses the same implementation method as Example 1. The difference from Example 1 is that the polyarylene sulfide resin composition of this comparative example contains the following component raw materials by weight percentage: 6.6% of PPS resin 1, 14.8% of PPS resin 2, 72% of silica 2, 6% of amorphous high-temperature resistant resin 2, 0.4% of silane coupling agent, and 0.2% of colorant.

[0029] Comparative Example 3 This comparative example uses the same implementation method as Example 1. The difference from Example 1 is that the polyarylene sulfide resin composition of this comparative example contains the following component raw materials by weight percentage: 6.6% of PPS resin 1, 14.8% of PPS resin 2, 72% of silica 2, 6% of amorphous high-temperature resistant resin 1, 0.4% of silane coupling agent, and 0.2% of colorant.

[0030] Comparative Example 4 This comparative example uses the same implementation method as Example 1. The difference from Example 1 is that the polyarylene sulfide resin composition of this comparative example contains the following component raw materials by weight percentage: 6.6% of PPS resin 1, 20.8% of PPS resin 2, 72% of silica 2, 0.4% of silane coupling agent, and 0.2% of colorant.

[0031] The usage amounts of each raw material in Examples 1-2 and Comparative Examples 1-4 are shown in Table 1.

[0032] Table 1 Usage amounts of raw materials in Examples 1-2 and Comparative Examples 1-4 (weight percentage)

[0033] Test Example The polyarylene sulfide resin compositions prepared in the above Examples 1-2 and Comparative Examples 1-4 were subjected to the following performance tests: (1) Determination of coefficient of linear thermal expansion (CLTE): The polyarylene sulfide resin composition was injection molded at a barrel temperature of 320 °C and a mold temperature of 150 °C to prepare a plate-shaped sample (80 mm in length × 80 mm in width × 3.2 mm in thickness) by injection molding. And in the MD (longitudinal direction, i.e., the resin flow direction) and TD (transverse direction, i.e., the direction perpendicular to the MD), relative to the center of the sample, a TMA test (using TMA402F3 of NETZSCH) was carried out on the test piece to determine the coefficient of linear thermal expansion (10E-6 / °C) of the polyarylene sulfide resin composition in the temperature range of 30 °C to 200 °C; (2) The notched Izod impact strength was determined according to ISO 179 / 1eA on a testing machine HIT25P (Zwick Roell, Germany); (3) Evaluation of processability (processing 25 kg): The number of broken bars < 5 was represented by ◎; the number of broken bars > 5 was represented by ○; and if it was impossible to draw a bar, it was represented by ×.

[0034] The above test results are shown in Table 2.

[0035] Table 2 Test Results

[0036] It can be seen from the results in Table 2 that: Compared with Comparative Example 1 and Comparative Example 4, in Examples 1-4, by adding a high-temperature resistant amorphous resin, the linear expansion coefficient of the material at high temperature can be reduced, the toughness of the material can also be improved, and at the same time, it has good processability; it shows that by adding a high-temperature resistant amorphous resin, the linear expansion coefficient of the material at high temperature can be reduced, and at the same time, the toughness and processability of the material can also be improved.

[0037] And from the results of Comparative Example 2 and Comparative Example 3, it can be seen that: when the addition amount of the high-temperature resistant amorphous resin in Comparative Example 2 and Comparative Example 3 reached 6%, processing difficulties occurred because the amorphous high-temperature resistant resin had low fluidity, and after adding a certain amount, it affected the fluidity, resulting in processing difficulties.

[0038] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0039] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A polyarylene sulfide resin composition, characterized in that: The invention is prepared from the following components in weight percentage: 25%-28% of PPS resin, 3%-5% of high temperature resistant amorphous resin, 64%-75% of silicon dioxide, 0-0.5% of silane coupling agent and 0-0.5% of colorant.

2. The polyarylene sulfide resin composition according to claim 1, characterized in that The high temperature resistant amorphous resin is polyetherimide or polyethersulfone.

3. The polyarylene sulfide resin composition according to claim 1, characterized in that The particle size of the silicon dioxide is 0.4-10 μm.

4. The polyarylene sulfide resin composition according to claim 1, characterized in that The melt index of the PPS resin at 315° C. is 100-1500 g / 10 min.

5. The polyarylene sulfide resin composition according to claim 1, characterized in that The silane coupling agent is a silane coupling agent.

6. The polyarylene sulfide resin composition according to claim 1, characterized in that The colorant is carbon black.

7. A method for preparing the polyarylene sulfide resin composition according to any one of claims 1 to 6, characterized in that: It includes the following steps: The PPS resin, the high temperature resistant amorphous resin, silicon dioxide, the silane coupling agent and the colorant are uniformly mixed in proportion, fed from the main feeding port of the extruder, melt-extruded and granulated to obtain a polyarylene sulfide resin composition.

8. The method for preparing the polyarylene sulfide resin composition according to claim 7, characterized in that: The temperature zones of the extruder are set as: 150°C in zone 1, 320°C in zone 2, 320°C in zone 3, 310°C in zone 4, 300°C in zone 5, 300°C in zone 6, 290°C in zone 7, 290°C in zone 8, 290°C in zone 9, and 290°C in zone 10; the screw speed is 280rpm, and the screw aspect ratio is 40:

1.

9. Use of the polyarylene sulfide resin composition according to any one of claims 1 to 6 in the preparation of optical communication parts.

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