A PPS resin composition and its preparation method and application

Abstract

The present invention relates to a PPS resin composition, a preparation method, and applications thereof. The composition comprises: PPS resin, glass fiber, styrene-GMA copolymer, and PA6T / 6I. The PPS resin of the present invention has outstanding low mold deposit and high crystallization temperature characteristics.

Description

Technical Field

[0001] The invention belongs to the field of engineering plastics, and in particular relates to a PPS resin composition, a preparation method and an application thereof. Background Art

[0002] Glass fiber reinforced PPS has excellent mechanical properties and inherent flame retardancy, making it widely used in the electronics and electrical fields. However, due to its high melting point and high processing temperature, PPS is prone to decomposition during processing, resulting in poor appearance during injection molding. Summary of the Invention

[0003] In view of the defects of the prior art, the present invention provides a PPS resin composition and a preparation method and application thereof.

[0004] A PPS resin composition of the present invention comprises, by weight:

[0005]

[0006] The mass percentage of GMA in the styrene-GMA copolymer is above 30%. The testing method of glycidyl methacrylate chain segment is infrared spectroscopy absorption method.

[0007] A high GMA ratio in styrene-GMA can reduce the amount of copolymer added, thereby reducing the impact of the added copolymer on the heat resistance of the material and avoiding further problems such as mold deposit caused by decomposition of the copolymer.

[0008] The mass percentage of GMA in the styrene-GMA copolymer of the present invention can be 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, etc., but the present invention is not limited thereto.

[0009] Preferably, the melt flow rate of the PPS resin at 316° C. and 5 kg is 300-900 g / 10 min.

[0010] The test standard for PPS resin melt flow rate is ISO 1133-1:2022.

[0011] The melt flow rate of the PPS resin of the present invention can be 300g / 10min, 350g / 10min, 500g / 10min, 550g / 10min, 600g / 10min, 650g / 10min, 700g / 10min, 750g / 10min, 800g / 10min, 850g / 10min, 900g / 10min, etc., but the present invention is not limited thereto.

[0012] Further preferably, the melt flow rate of the PPS resin at 316° C. and 5 kg is 500-750 g / 10 min.

[0013] Preferably, the mass percentage of GMA in the styrene-GMA copolymer is 40-60%.

[0014] Preferably, the components further include 0.1-1 parts of auxiliary agents.

[0015] Preferably, the auxiliary agent is one or more of a toughening agent (such as SEBS, POE, etc.), mineral powder (such as calcium carbonate, talc, etc.), a lubricant (such as PE wax, silicone, etc.), and a colorant (such as carbon black, titanium dioxide, etc.).

[0016] Preferably, the components include, by weight:

[0017]

[0018] A method for preparing the PPS resin composition of the present invention comprises:

[0019] The components are weighed according to the weight ratio, mixed, and then melt-extruded and granulated in a twin-screw extruder to obtain a PPS resin composition.

[0020] The PPS resin composition of the present invention is used in the field of electronic appliances, such as connectors.

[0021] The styrene-GMA copolymer in this invention can end-cap PPS, while PA6T / 6I can interact with thioether bonds, reducing the activity of PPS and protecting the PPS molecular chains from damage, thereby synergistically reducing processing issues such as mold deposit. Furthermore, end-capping generally lowers the crystallization temperature, but PA6T / 6I acts as a nucleating agent, overcoming this effect and raising the crystallization temperature.

[0022] Beneficial effects

[0023] The PPS resin of the present invention has outstanding low mold deposit and high crystallization temperature characteristics. DETAILED DESCRIPTION

[0024] Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiments are only used to illustrate the present invention and are not used in limiting the scope of the present invention.In addition, should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.

[0025] 1. Source of raw materials

[0026] PPS resin-1, PPS 3450, Xinhecheng, melt flow rate at 316℃, 5KG is 500g / 10min;

[0027] PPS resin-2, PPS 1170C, Xinhecheng, melt flow rate at 316℃, 5KG is 750g / 10min;

[0028] PPS resin-3, PPS 20030C, 316°C, melt flow rate at 5KG is 300g / 10min;

[0029] Fiberglass: ECS10-03-584, Boulder;

[0030] Styrene-GMA copolymer-1, GMA mass percentage 40%;

[0031] Styrene-GMA copolymer-2, GMA mass percentage 60%;

[0032] Styrene-GMA copolymer-3, GMA mass percentage 80%;

[0033] Styrene-GMA copolymer-4, GMA mass percentage 30%;

[0034] Styrene-GMA copolymer-5, GMA mass percentage 20%;

[0035] PA6T / 6I: SELAR PA3426, DuPont;

[0036] PA6T: Solvay AMODEL A-6000;

[0037] Additives: SEBS, commercially available;

[0038] The auxiliary agent used in the parallel examples and comparative examples is the same commercially available product.

[0039] 2. Preparation methods of examples and comparative examples

[0040] The components are weighed according to the weight ratio, mixed, and then melt-extruded and granulated in a twin-screw extruder to obtain a PPS resin composition.

[0041] 3. Test standards and methods

[0042] Mold Deposits: There is an iron sheet at the end of the mold to collect mold deposits. After 200 consecutive injections, remove the sheet and weigh the weight change for evaluation. A: 0 ≤ mold deposit weight ≤ 0.01mg, B: 0.01 < mold deposit weight ≤ 0.05mg, C: 0.05 < mold deposit weight ≤ 0.1mg, D: mold deposit weight > 0.1mg.

[0043] Cooling crystallization temperature: Use DSC to test the cooling crystallization temperature, the test temperature is 300-20℃, the cooling rate is 20℃ / min, and the crystallization peak temperature is recorded.

[0044] Table 1 Proportions of the embodiments (parts by weight)

[0045]

[0046] Table 2 Comparative Example Proportions (parts by weight)

[0047]

[0048]

[0049] Table 3 Performance data of the embodiment

[0050]

[0051] Table 4 Performance effect data of comparative examples

[0052] Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Comparative Example 6 mold deposit C C D C C C Crystallization properties 240 229 242 226 230 242

[0053] It can be seen from the examples that the mold deposit grade of the PPS resin composition of the present invention can reach AB grade, and the crystallization temperature is above 240°C.

Claims

1. A PPS resin composition, characterized in that In parts by weight, the components include: 60-90 parts of PPS resin; 10-40 parts of glass fiber; 0.1-0.5 parts of styrene-GMA copolymer; PA6T / 6I 0.1-0.5 parts; The mass percentage of glycidyl methacrylate GMA in the styrene-GMA copolymer is above 30%.

2. The PPS resin composition according to claim 1, wherein The melt flow rate of the PPS resin at 316° C. and 5 kg is 300-900 g / 10 min.

3. The PPS resin composition according to claim 2, wherein The melt flow rate of the PPS resin at 316° C. and 5 kg is 500-750 g / 10 min.

4. The PPS resin composition according to claim 1, wherein The mass percentage of GMA in the styrene-GMA copolymer is 40-60%.

5. The PPS resin composition according to claim 1, wherein The components also include 0.1-1 parts of auxiliary agents.

6. The PPS resin composition according to claim 5, characterized in that The auxiliary agent is one or more of a toughening agent, mineral powder, lubricant, and colorant.

7. The PPS resin composition according to claim 1, wherein In parts by weight, the components include: PPS 70-85 copies; 15-30 parts of glass fiber; 0.2-0.4 parts of styrene-GMA copolymer; PA6T / 6I 0.2-0.4 parts.

8. A method for preparing the PPS resin composition according to claim 1, comprising: The components are weighed according to the weight ratio, mixed, and then melt-extruded and granulated in an extruder to obtain a PPS resin composition.

9. Use of the PPS resin composition according to claim 1 in the field of electronic appliances.

Images