Low-hygroscopic and high-yellowing-resistant PPA material and preparation method thereof

Abstract

The application relates to the field of functional plastic materials, and discloses a low-hygroscopic high-yellowing-resistance PPA material and a preparation method thereof. The low-hygroscopic high-yellowing-resistance PPA material is prepared from the following raw materials in parts by weight: PPA resin 50-70 parts, glass fiber 32-42 parts, mineral filler 10-20 parts, hydrophobic nylon resin 25-35 parts, flame retardant 5-8 parts, and antioxidant 1-3 parts; the hydrophobic nylon resin is composed of PA resin, rosin-modified maleic acid resin, tetrapolymerized ricinoleic acid ester, dibutyl itaconate and silane coupling agent; the preparation method is as follows: the PPA resin, the hydrophobic nylon resin, the glass fiber, the mineral filler, the flame retardant and the antioxidant are mixed and melt-extruded, and then cooled, dried and cut into particles. The preparation process is simple, the prepared PPA material has good water resistance and yellowing resistance, has good welding stability and temperature resistance stability when applied to electronic connectors, and is not prone to cracking.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of functional plastic materials, more particularly, it relates to a low-hygroscopic high-yellowing-resistant PPA material and a preparation method thereof. BACKGROUND

[0002] Polyamide resin (abbreviation: PA, commonly known as nylon) has excellent properties such as light weight, heat resistance, wear resistance, and chemical corrosion resistance. These properties make polyamide resin widely used in the field of electronics and electrical appliances, such as in electronic connectors.

[0003] During the application of the electronic connector, it needs to be connected with the PCB through the high-temperature reflow soldering process, and the temperature of the high-temperature reflow soldering can generally reach 240-280℃. The electronic connector is prone to yellowing and water absorption blistering under the condition of continuous high temperature, which reduces the processing stability and use stability of the electronic connector.

[0004] In order to improve the problem that the polyamide resin is prone to yellowing and water absorption blistering in the electronic connector, generally some glass fibers and mineral fillers are added to the polyamide resin to improve the compactness and dimensional stability of the polyamide resin, reduce the water penetration channel, thereby reducing the water absorption and improving the oxidation resistance. At the same time, the glass fibers and mineral fillers can also improve the mechanical strength of the polyamide resin, but the addition of glass fibers and mineral fillers will increase the brittleness of the polyamide resin. During the high-temperature reflow soldering process, the electronic connector is locally heated or cooled, and the soldering part is prone to cracking, which reduces the use stability of the electronic connector. SUMMARY

[0005] In order to solve the problem that the polyamide resin used in the electronic connector is prone to yellowing and water absorption blistering during high-temperature reflow soldering, and local cracking, the present application provides a low-hygroscopic high-yellowing-resistant PPA material and a preparation method thereof.

[0006] In the first aspect, the present application provides a low-hygroscopic high-yellowing-resistant PPA material, which adopts the following technical scheme:

[0007] A low-hygroscopic high-yellowing-resistant PPA material is prepared from the following raw materials by weight:

[0008]

[0009] The hydrophobic nylon resin is composed of PA resin, rosin modified maleic acid resin, tetrapolymerized ricinoleic acid ester, dibutyl itaconate, and silane coupling agent.

[0010] By adopting the technical scheme, the PPA resin has excellent mechanical properties, heat resistance, creep resistance and fatigue resistance, low water absorption and good processing fluidity. The application uses the PPA resin as the resin system, and adds glass fibers and mineral fillers as reinforcing agents in the PPA resin, so as to improve the structural compactness of the resin system, and further improve the water resistance and anti-yellowing performance of the prepared PPA material. However, the addition of glass fibers and mineral fillers has the problem of uniform dispersion in the resin system, and the prepared PPA material has high rigidity and brittleness, and is prone to cracking. Therefore, the application further adds the hydrophobic nylon resin prepared from the PA resin, the rosin modified maleic resin, the tetrapolymerized ricinoleic acid ester, the dibutyl itaconate and the silane coupling agent. The PA resin has low cost and excellent mechanical properties, but the hydrophilic groups (such as amino and amide groups) in the PA resin can form hydrogen bonds with water molecules, so that the PA resin has water absorption. Therefore, the application adds the rosin modified maleic resin, the tetrapolymerized ricinoleic acid ester, the dibutyl itaconate and the silane coupling agent to the PA resin, which have a good synergistic effect to form an interwoven system with good hydrophobicity, so that the PA resin is uniformly adsorbed and dispersed in the interwoven system. The prepared hydrophobic nylon resin has excellent flexibility, water resistance and dispersibility, and can further improve the compatibility of the PPA resin, the glass fibers and the mineral fillers, without the need for additional addition of a compatibilizer. The prepared PPA material has good water resistance and anti-yellowing performance, and also has good toughness, is not easy to absorb water or yellow, has good aging resistance and is not easy to crack, and the antioxidant is uniformly dispersed in the resin system to further improve the anti-yellowing performance of the prepared PPA material.

[0011] Preferably, the hydrophobic nylon resin is prepared from the following raw materials by weight:

[0012] PA resin 60-80 parts

[0013] Rosin modified maleic resin 10-20 parts

[0014] Tetrapolymerized ricinoleic acid ester 8-12 parts

[0015] Dibutyl itaconate 6-10 parts

[0016] Silane coupling agent 4-6 parts.

[0017] By adopting the technical scheme, the PA resin is mixed and modified by the optimal amount of rosin modified maleic resin, tetrameric ricinoleic acid ester, dibutyl itaconate and silane coupling agent, which has good synergistic effect. Under the synergistic penetration of tetrameric ricinoleic acid ester and dibutyl itaconate, the PA resin is fully swollen and stretched, and is dispersed and interwoven in the hydrophobic system formed by the rosin modified maleic resin and the silane coupling agent. The prepared hydrophobic nylon resin has excellent flexibility, water resistance and anti-yellowing property, can be further dispersed in the resin system to form a uniform hydrophobic dense structure, and further improves the water resistance, anti-yellowing property and temperature stability of the prepared PPA material, and is not easy to crack.

[0018] Preferably, the PA resin is PA-66 and / or PA-6.

[0019] By adopting the technical scheme, the PA resin has good mechanical properties and relatively low cost compared with other PA resins, but the water absorption of the PA resin is relatively high. Therefore, by mixing and modifying the PA resin, the water resistance of the PA resin is greatly improved, the production cost is reduced, and the water resistance and anti-yellowing property of the prepared PPA material are improved, which is suitable for industrial continuous production.

[0020] Preferably, the silane coupling agent is composed of n-octyl trimethoxysilane and tetra(dimethyl vinyl siloxy) silane in a weight ratio of 1:(1-3).

[0021] By adopting the technical scheme, the n-octyl trimethoxysilane containing long straight chain alkyl is compounded with tetra(dimethyl vinyl siloxy) silane, which is interwoven and dispersed with the branched siloxy and four branched vinyl groups in the molecular structure of tetra(dimethyl vinyl siloxy) silane to form a reticular dispersed hydrophobic system. The PA resin is uniformly interwoven and dispersed in the system of the silane coupling agent, which can further improve the water resistance and anti-yellowing property of the hydrophobic nylon resin, and further improve the flexibility, water resistance and anti-yellowing property of the prepared PPA material, and has good temperature stability and is not easy to crack.

[0022] Preferably, the hydrophobic nylon resin is prepared by the following steps:

[0023] The PA resin, rosin modified maleic resin, tetrameric ricinoleic acid ester, dibutyl itaconate and silane coupling agent are mixed, melt extruded, cooled, dried and granulated to prepare the hydrophobic nylon resin.

[0024] By adopting the technical scheme, the raw materials are mixed and melt extruded to prepare the hydrophobic nylon resin with stable performance.

[0025] Preferably, the melting temperature is 240-270℃.

[0026] By adopting the technical scheme, the relatively optimal melting temperature can make the components uniformly mixed and melted, and a hydrophobic nylon resin with uniform dispersion is prepared.

[0027] Preferably, the glass fiber is an alkali-free glass fiber and / or a medium-alkali glass fiber; and the mineral filler is one or a combination of calcium carbonate, kaolin, wollastonite and talc powder.

[0028] By adopting the technical scheme, the glass fiber and the mineral filler have good mechanical strength, rigidity and fatigue resistance, and when added to the resin system, they can fill and reinforce the molecular chain segments of the resin system, improve the compactness of the material, reduce the shrinkage rate, and thus reduce the moisture absorption and yellowing performance of the prepared PPA material while improving the flame retardancy.

[0029] Preferably, the flame retardant is an ammonium phosphate-based flame retardant and / or a phosphazene-based flame retardant.

[0030] By adopting the technical scheme, the flame retardant has good flame retardancy, which can improve the flame retardancy of the prepared low-moisture high-yellowing-resistance PPA material.

[0031] Preferably, the antioxidant is composed of a hydroxylamine antioxidant, a hindered amine antioxidant and a benzofuranone antioxidant in a weight ratio of 1:(1-2):(0.5-1).

[0032] By adopting the technical scheme, the hydroxylamine antioxidant, the hindered amine antioxidant and the benzofuranone antioxidant in the relatively optimal amount ratio have a synergistic effect, good color protection, high compatibility, low volatility and stable high-temperature storage, and perform particularly well as stabilizers in melt processing, which are suitable for the resin system of the application and can further improve the yellowing resistance of the prepared PPA material.

[0033] In a second aspect, the application provides a preparation method of a low-moisture high-yellowing-resistance PPA material, which adopts the following technical scheme:

[0034] A preparation method of a low-moisture high-yellowing-resistance PPA material, comprising the following preparation steps:

[0035] The PPA resin and the hydrophobic nylon resin are added to a mixing device, and after being uniformly mixed, the glass fiber, the mineral filler, the flame retardant and the antioxidant are added and uniformly mixed, and then melt extrusion, cooling, drying and granulation are performed to prepare a low-moisture high-yellowing-resistance PPA material.

[0036] By adopting the technical scheme, the raw materials are mixed and melt extruded to prepare a low-moisture high-yellowing-resistance PPA material with stable performance.

[0037] In summary, the application has the following beneficial effects:

[0038] 1. The low moisture absorption and high yellowing resistance PPA material of the present application is prepared from PPA resin, glass fiber, mineral filler, hydrophobic nylon resin, flame retardant and antioxidant, the hydrophobic nylon resin is prepared from rosin modified maleic acid resin, tetrapolymerized ricinoleic acid ester, dibutyl itaconate and silane coupling agent, the prepared PPA material has good water resistance and yellowing resistance, and also has good toughness, is applied to electronic connectors, has good welding stability, is not easy to absorb water or yellow, has good aging resistance, and is not easy to crack.

[0039] 2. The silane coupling agent composed of n-octyl trimethoxysilane and tetra(dimethyl vinyl siloxy) silane can further improve the water resistance and yellowing resistance of the hydrophobic nylon resin, and improve the dispersibility of the glass fiber and mineral filler in the resin system, and further improve the comprehensive performance of the PPA material.

[0040] 3. The antioxidant composed of hydroxylamine antioxidant, hindered amine antioxidant and benzofuranone antioxidant can be uniformly dispersed in the resin system of the present application, has good synergistic effect with the hydrophobic nylon resin, and further improves the yellowing resistance of the prepared PPA material. DETAILED DESCRIPTION

[0041] The present application will be further described in detail below in combination with examples.

[0042] The following are the sources and specifications of some raw materials of the present application, the raw materials used in the preparation examples and examples of the present application can be obtained by market, including but not limited to the following types and manufacturers of raw materials, and raw materials with equivalent performance can be used:

[0043] 1. PPA resin: DuPont HTN502;

[0044] 2. Glass fiber: Jushi Group, no-alkali glass fiber: diameter 10-20 μm, fiber length 1-3 mm; medium-alkali glass fiber: diameter 10-20 μm, fiber length 1-3 mm;

[0045] 3. Mineral filler: calcium carbonate: light calcium carbonate, 800-1250 mesh;

[0046] Kaolin: calcined kaolin, 800-1250 mesh;

[0047] Talc: 800-1250 mesh;

[0048] 4. PA resin: PA6: DuPont 7331J;

[0049] PA66: Asahi Kasei 1300S;

[0050] PA612: DuPont 157HSL;

[0051] 5. Rosin-modified maleic acid resin: type 422;

[0052] 6. Tetra-ricinoleate: kinematic viscosity 250-450 cSt / °C, acid value 45-65 KOH mg / g, Hongli Chemical;

[0053] 7. Dibutyl itaconate: CAS number 2155-60-4, content 99%;

[0054] 8. Hydroxylamine antioxidant: Qitai Chemical, Revonox 420V;

[0055] 9. Hindered amine antioxidant: Antioxidant 5057 or Antioxidant T-557;

[0056] 10. Benzofuranone antioxidant: Qitai Chemical, Revonox 501.

[0057] Preparation example of hydrophobic nylon resin

[0058] Preparation example 1

[0059] 6 kg of PA-66 as PA resin, 2 kg of rosin-modified maleic acid resin, 0.8 kg of tetra-ricinoleate, 1 kg of dibutyl itaconate, and 0.4 kg of dodecyl trimethoxysilane as a silane coupling agent were mixed, a double-screw extruder was used, the extrusion pressure was adjusted to 80 MPa, the screw rotation speed was 20 r / min, the temperature of the first zone of the cylinder was 240 °C, the temperature of the second zone was 250 °C, the temperature of the third zone was 265 °C, the temperature of the die was 260 °C, and the hydrophobic nylon resin was prepared by melt extrusion, water cooling, hot air drying, and pelletizing.

[0060] Preparation examples 2-3

[0061] Preparation examples 2-3 differ from preparation example 1 in that the raw material usage and preparation parameters are different, and the specific reference is shown in Table 1 below.

[0062] Table 1 Raw material usage and preparation conditions of preparation examples 1-3

[0063]

[0064]

[0065] Preparation example 4

[0066] Preparation example 4 differs from preparation example 1 in that the type of silane coupling agent is different, and the silane coupling agent in preparation example 4 is composed of n-octyl trimethoxysilane and tetra(dimethyl vinyl siloxy) silane, the usage of n-octyl trimethoxysilane is 0.2 kg, the usage of tetra(dimethyl vinyl siloxy) silane is 0.2 kg, and the others are the same as preparation example 1.

[0067] Preparation Example 5

[0068] Preparation Example 5 is different from Preparation Example 4 in that the amount of octyltrimethoxysilane is 0.1 kg and the amount of tetra(dimethylvinylsiloxy)silane is 0.3 kg, and is otherwise the same as Preparation Example 1.

[0069] Preparation Comparative Example 1

[0070] Preparation Comparative Example 1 is different from Preparation Example 1 in that the rosin-modified maleic acid resin is replaced with an equal amount of terpene resin, which has a CAS number of 9003-74-1 and a content of 99%, model T100, and is otherwise the same as Preparation Example 1.

[0071] Preparation Comparative Example 2

[0072] Preparation Comparative Example 2 is different from Preparation Example 1 in that the tetrameric ricinoleic acid ester is replaced with an equal amount of ethylene bis-oleic acid amide, which is Crodamide EBO from Croda, and is otherwise the same as Preparation Example 1.

[0073] Preparation Comparative Example 3

[0074] Preparation Comparative Example 3 is different from Preparation Example 1 in that the dibutyl itaconate is replaced with an equal amount of dioctyl phthalate, and is otherwise the same as Preparation Example 1.

[0075] Preparation Comparative Example 4

[0076] Preparation Comparative Example 4 is different from Preparation Example 1 in that the tetrameric ricinoleic acid ester is replaced with an equal amount of dibutyl itaconate, and is otherwise the same as Preparation Example 1.

[0077] Example

[0078] Example 1

[0079] Example 1 discloses a low-hygroscopic high-yellowing-resistant PPA material, which is prepared by the following steps:

[0080] 5 kg of PPA resin, 2.5 kg of the hydrophobic nylon resin prepared in Preparation Example 1 were added into a mixing device, mixed at a temperature of 180℃ for 30 min, and then 3.2 kg of glass fiber without alkali as a glass fiber, 1 kg of calcium carbonate as a mineral filler, 0.5 kg of ammonium phosphate as a flame retardant, and 0.2 kg of an antioxidant (consisting of antioxidant 1010 and antioxidant 168 at a weight ratio of 1:1) were added and mixed uniformly. A twin-screw extruder was used, and the extrusion pressure was adjusted to 90 MPa, the screw rotation speed was 30 r / min, the temperature of the first zone of the cylinder was 290℃, the temperature of the second zone was 315℃, the temperature of the third zone was 330℃, the temperature of the die was 310℃, and the material was melted, extruded, water-cooled, hot-air dried, and pelletized to prepare a low-hygroscopic high-yellowing-resistant PPA material.

[0081] Example 2-3

[0082] Example 2-3 differs from Example 1 in that the raw material usage and preparation conditions are different, and the source of the hydrophobic nylon resin is also different. See Table 2 below for details.

[0083] Table 2 Raw material usage, preparation conditions, and source of hydrophobic nylon resin for Examples 1-3

[0084]

[0085]

[0086] Examples 4-5

[0087] Examples 4-5 differ from Example 1 in that the source of the hydrophobic nylon resin is different. See Table 3 below for details.

[0088] Table 3 Source of hydrophobic nylon resin for Examples 4-5

[0089] Examples Sources of hydrophobic nylon resins Example 4 Preparation Example 4 Example 5 Preparation Example 5

[0090] Example 6

[0091] Example 6 differs from Example 5 in that the antioxidant is different. In Example 7, the antioxidant consists of a hydroxylamine antioxidant, a hindered amine antioxidant, and a benzofuranone antioxidant. The usage of the hydroxylamine antioxidant is 0.08 kg, the usage of the hindered amine antioxidant (antioxidant 5057) is 0.08 kg, and the usage of the benzofuranone antioxidant is 0.04 kg. The rest is the same as Example 5.

[0092] Example 7

[0093] Example 7 differs from Example 6 in that the amount of hydroxylamine antioxidant is 0.05 kg, the amount of hindered amine antioxidant (antioxidant T-557) is 0.1 kg, the amount of benzofuranone antioxidant is 0.05 kg, and the rest is the same as Example 6.

[0094] Comparative Example

[0095] Comparative Example 1

[0096] Comparative Example 1 differs from Example 1 in that the hydrophobic nylon resin is replaced by PA612 resin in equal amount, and the rest is the same as Example 1.

[0097] Comparative Examples 2-5

[0098] Comparative Examples 2-5 differ from Example 1 in that the source of the hydrophobic nylon resin is different, as shown in Table 4 below.

[0099] Table 4 Source table of hydrophobic nylon resin in Comparative Examples 1-5

[0100] Comparative Example Sources of hydrophobic nylon resins Comparative Example 2 Preparation of Comparative Example 1 Comparative Example 3 Preparation of Comparative Example 2 Comparative Example 4 Preparation of Comparative Example 3 Comparative Example 5 Preparation of Comparative Example 4

[0101] Performance test The low-hygroscopic and high-yellowing-resistant PPA materials prepared in Examples 1-7 and Comparative Examples 1-5 were tested for performance as follows:

[0102] The low-hygroscopic and high-yellowing-resistant PPA materials were injection molded to prepare test pieces, and the test pieces had a size of length* width* height = 5 cm*3 cm*0.2 cm;

[0103] 1. Hygroscopicity test:

[0104] The test pieces were placed in a constant temperature and humidity chamber at a temperature of 250°C and a humidity of 85%, and left for 48 h. After wiping dry, the weight change rate of the test pieces was calculated and recorded as the water absorption rate (unit: %). The test results were tested and recorded;

[0105] 2. Yellowing test:

[0106] The test pieces were placed in a constant temperature and humidity chamber at a temperature of 250°C and a humidity of 85% for 7 days. The color difference analyzer was used to measure the color difference change before and after the test, and the test results were tested and recorded;

[0107] 3. Anti-cracking test:

[0108] The test pieces were placed in a constant temperature and humidity chamber at a temperature of 250°C and a humidity of 85% for 1 day. After taking out, they were immediately placed in a refrigerator at a temperature of -10°C for 1 day. The test was repeated for 7 times in this way. After returning to room temperature, it was observed whether there were cracks on the surface of the test pieces, and the test results were recorded;

[0109] The following are the performance test data of the low moisture absorption and high yellowing resistance PPA materials prepared in Examples 1-7 and Comparative Examples 1-5, see Table 5 below.

[0110] Table 5 Performance data table of Examples 1-7 and Comparative Examples 1-5

[0111]

[0112]

[0113] In combination with Examples 1-3 and Examples 4-5, Comparative Examples 1-5, and in combination with Table 5, it can be concluded that the PPA material prepared using the hydrophobic nylon resin consisting of PA resin, rosin modified maleic resin, tetrapolymerized ricinoleic acid ester, dibutyl itaconate and silane coupling agent according to the present application has lower water absorption and better yellowing resistance, and does not crack after high and low temperature change tests. Compared with Example 1, Examples 4-5 use n-octyltrimethoxysilane and tetra(dimethylvinylsiloxy)silane as the silane coupling agent system, both of which have good synergistic effect, the water absorption of the prepared PPA resin is reduced by 0.09%, and the color difference is reduced by 0.1; compared with Example 1, Comparative Examples 2-5, the water absorption of the prepared PPA resin is significantly improved, from 0.13% to a maximum of 0.5%, the yellowing resistance is significantly reduced, the color difference is increased from 0.43 to 1.04, and cracks appear after high and low temperature tests. Therefore, the PA resin, rosin modified maleic resin, tetrapolymerized ricinoleic acid ester, dibutyl itaconate and silane coupling agent with a better dosage ratio have a good synergistic effect, which can improve the compactness and toughness of the resin system, and improve the dispersion uniformity of the antioxidant, thereby improving the water resistance, yellowing resistance and cracking resistance of the prepared PPA resin; in Comparative Example 1, the hydrophobic nylon resin is replaced by PA612 resin, the water resistance and yellowing resistance of the prepared PPA resin are reduced, and obvious cracks appear after high and low temperature tests, which may be because the dispersion uniformity and structural compactness of the resin system are reduced, the rigidity of the PPA resin is improved, and the unevenly dispersed system is prone to water absorption and yellowing problems.

[0114] In combination with Example 5 and Examples 6-7, and in combination with Table 5, it can be concluded that the hydroxylamine antioxidant, hindered amine antioxidant and benzofuranone antioxidant consisting of a better dosage ratio according to the present application are more suitable for the resin system of the present application, and have a good synergistic effect, which can further improve the yellowing resistance of the prepared PPA resin.

[0115] The embodiments are only illustrative of the present application, and are not intended to limit the present application, and those skilled in the art can make modifications to the embodiments without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A low moisture absorbing high yellowing resistant PPA material characterized in that, PPA resin 50-70 parts Glass fiber 32-42 parts Mineral filler 10-20 parts Hydrophobic nylon resin 25-35 parts Flame retardant 5-8 parts Antioxidant 1-3 parts The hydrophobic nylon resin is composed of PA resin, rosin modified maleic resin, tetrapolymerized ricinoleic acid ester, dibutyl itaconate and silane coupling agent. The hydrophobic nylon resin is prepared from the following raw materials by weight:

2. The low moisture absorption and high yellowing resistance PPA material of claim 1, wherein, PA resin 60-80 parts Rosin modified maleic resin 10-20 parts Tetrapolymerized ricinoleic acid ester 8-12 parts Dibutyl itaconate 6-10 parts Silane coupling agent 4-6 parts. The PA resin is PA-66 and / or PA-6.

3. The low moisture absorption and high yellowing resistance PPA material of claim 2, wherein, The silane coupling agent is composed of n-octyl trimethoxysilane and tetra(dimethyl vinyl siloxy) silane in a weight ratio of 1: (1-3).

4. The low moisture absorption and high yellowing resistance PPA material of claim 2, wherein, The hydrophobic nylon resin is prepared by the following steps:

5. A low moisture absorbing high yellowing resistant PPA material according to any one of claims 2-4, characterized in that, The PA resin, rosin modified maleic resin, tetrapolymerized ricinoleic acid ester, dibutyl itaconate and silane coupling agent are mixed, melt extruded, cooled, dried and granulated to obtain the hydrophobic nylon resin. The melting temperature is 240-270℃.

6. The low moisture absorption and high yellowing resistance PPA material of claim 5, wherein, The glass fiber is alkali-free glass fiber and / or medium alkali glass fiber; the mineral filler is one or a combination of calcium carbonate, kaolin, wollastonite and talc powder.

7. The low moisture absorption and high yellowing resistance PPA material of claim 1, wherein, The flame retardant is ammonium phosphate type flame retardant and / or phosphazene type flame retardant.

8. The low moisture absorption and high yellowing resistance PPA material of claim 1, wherein, The antioxidant is composed of hydroxylamine antioxidant, hindered amine antioxidant and benzofuranone antioxidant in a weight ratio of 1: (1-2): (0.5-1).

9. The low moisture absorption and high yellowing resistance PPA material of claim 1, wherein, The following preparation steps are included:

10. A process for the preparation of a low moisture absorbing high yellowing resistant PPA material as claimed in any one of claims 1 to 9, characterized in that: The PPA resin and the hydrophobic nylon resin are added to a mixing device, and after being mixed evenly, the glass fiber, mineral filler, flame retardant and antioxidant are added and mixed evenly, melt extruded, cooled, dried, cut into particles to obtain the low-hygroscopic high-yellowing-resistant PPA material. ​

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