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CN-122011761-A - PPA-POK alloy composition and preparation method and application thereof

CN122011761ACN 122011761 ACN122011761 ACN 122011761ACN-122011761-A

Abstract

The invention discloses a PPA-POK alloy composition, a preparation method and application thereof. The composition comprises, by weight, 30-60 parts of PPA resin, 10-20 parts of POK resin, 8-20 parts of alkyl phosphinate flame retardant, 1-5 parts of compatilizer and 1-5 parts of synergist. The preparation method of the composition comprises the steps of uniformly mixing all the components according to the proportion, and then carrying out melt blending extrusion granulation. The PPA-POK alloy composition has high thermal deformation temperature and high glow wire ignition temperature, and is suitable for preparing electrical parts with severe requirements on heat resistance and flame retardance, such as key parts of relays, circuit breakers, high-voltage connectors and the like.

Inventors

  • HE ZHENTAO
  • CHEN PINGXU
  • XIE MINGCHEN
  • QIU JIEDONG
  • JIANG ZHIQIANG
  • JIANG SUJUN
  • SUN XUEKE
  • WANG FENG

Assignees

  • 珠海万通特种工程塑料有限公司
  • 金发科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260401

Claims (10)

  1. 1. The PPA-POK alloy composition is characterized by comprising the following components in parts by weight 30-60 Parts of PPA resin; 10-20 parts of POK resin; 8-20 parts of alkyl phosphinate flame retardant; 1-5 parts of compatilizer; 1-5 parts of synergist.
  2. 2. The PPA-POK alloy composition of claim 1, wherein the composition comprises, in parts by weight: 35-55 parts of PPA resin; 13-18 parts of POK resin; 10-18 parts of alkyl phosphinate flame retardant; 2-4 parts of compatilizer; 2-4 parts of synergist.
  3. 3. The PPA-POK alloy composition according to claim 1, wherein said POK resin has a melt index of 5-250 g/(10 min), ASTM D1238,240 ℃,2.16kg, preferably 40-210 g/(10 min), further preferably 45-160 g/(10 min).
  4. 4. The PPA-POK alloy composition according to claim 1, wherein at least one of the following conditions is satisfied: (a) The alkyl phosphinate flame retardant is selected from the group consisting of aluminum diethyl phosphinate; (b) The compatibilizer is selected from maleic anhydride graft copolymers, preferably maleic anhydride graft ethylene copolymers; (c) The composition further comprises 0.5-2 parts of an antioxidant, preferably at least one selected from hindered phenol antioxidants, amine antioxidants, phosphite antioxidants and thioester antioxidants.
  5. 5. A PPA-POK alloy composition according to claim 1, wherein said synergist is selected from at least one of borates, boehmite and melamine polyphosphate, preferably borates.
  6. 6. The PPA-POK alloy composition according to claim 1, further comprising at least one of the following components, 15-50 parts of filler, preferably at least one of glass fiber, carbon fiber, mica, preferably glass fiber.
  7. 7. The PPA-POK alloy composition according to claim 1, further comprising 1-8 parts of nickel titanium alloy.
  8. 8. The method for preparing the PPA-POK alloy composition of claims 1-7, wherein all the components are uniformly mixed according to a proportion and are subjected to melt blending extrusion granulation.
  9. 9. Use of a PPA-POK alloy composition according to claims 1-7 for the preparation of electrical articles.
  10. 10. An electrical article comprising the PPA-POK alloy composition of any one of claims 1-7.

Description

PPA-POK alloy composition and preparation method and application thereof Technical Field The invention belongs to the field of high polymer materials, and particularly relates to a PPA-POK alloy composition, a preparation method and application thereof. Background GWIT (glow wire ignition temperature) refers to the lowest temperature at which a sample can be ignited to burn continuously (or glow) when the glow wire contacts the sample of the material under prescribed test conditions, and is mainly used for evaluating the ability of the material to resist ignition of the glow spot inside the electrical equipment, and is one of the core indexes of the safety design of the electrical equipment. Unattended equipment typically requires long runs and unattended monitoring, and therefore requires extremely high safety requirements for the materials used inside. Electronic components, wires, etc. in unattended equipment may develop high temperatures during long-term operation due to various reasons, such as poor contact, overload, short circuits, etc. If the GWIT of the materials of the housing, insulating parts, etc. of the device is low, it is easily ignited by these high temperature points, resulting in malfunction of the device and even fire. By ensuring that the equipment parts have higher GWIT, the reliability of the equipment in a high-temperature environment can be improved, and equipment damage and safety accidents caused by material combustion are reduced. With the gradual popularization of unmanned electric equipment in the industrial and energy fields, the GWIT performance of plastic materials is more concerned, and the materials and parts of the unmanned equipment are required to have enough glowing resistance and non-ignition performance, so that the GWIT is an important index for measuring the safety of the unmanned equipment. The high GWIT material can effectively reduce the risk of fire, and ensure the reliable operation of equipment and the safety of personnel and property. Semi-aromatic polyamide (PPA) has the characteristics of excellent mechanical properties, high melting point, high Heat Distortion Temperature (HDT), excellent temperature resistance, excellent electrical insulation property, low toxicity and low smoke environment friendliness, and is widely applied to the field of connectors. In electrical equipment, attention is paid to the GWIT performance of plastic materials, for example, the GWIT requirement of plastic materials with the voltage within 3mm of an electrical connection part is more than or equal to 750 ℃ and the GWIT requirement of plastic materials is more than or equal to 775 ℃ for parts such as a shell, a base, a coil skeleton and the like of a relay. As the red phosphorus has high-efficiency flame retardant effect in both gas phase and condensed phase, the red phosphorus flame retardant polyamide is easier to reach higher GWIT, and compared with the red phosphorus flame retardant polyamide, the dialkyl phosphinate flame retardant polyamide has lower GWIT and has higher development difficulty. However, dialkylphosphinate flame retardant polyamides are widely used and development of dialkylphosphinate flame retardant polyamides with high GWIT (. Gtoreq.775 ℃) is highly desirable. In addition, the electrical equipment has higher and higher requirements on heat resistance of plastic materials, on one hand, heat generated by electrifying the equipment needs to ensure long-term working stability, and on the other hand, flame spreading caused by high-temperature softening during combustion is avoided. The heat resistance of the plastic part which is in direct contact with the high-temperature heat source at present requires the heat distortion temperature to be 210-280 ℃, and the heat distortion temperature of the high-temperature resistant modified material is required to be more than 250 ℃ along with the development part of the industry. It would therefore be of great interest to provide a PPA-POK alloy composition having a high heat distortion temperature, while also having high GWIT properties. Disclosure of Invention A first object of the present invention is to solve the above-mentioned problems and to provide a PPA-POK alloy composition having a high heat distortion temperature and a high GWIT. The second object of the present invention is to provide a method for producing the PPA-POK alloy composition. A third object of the present invention is to provide the use of the PPA-POK alloy composition described above. A fourth object of the present invention is to provide an electrical article comprising the PPA-POK alloy composition described above. The invention is realized by the following technical scheme: The PPA-POK alloy composition comprises the following components in parts by weight 30-60 Parts of PPA resin; 10-20 parts of POK resin; 8-20 parts of alkyl phosphinate flame retardant; 1-5 parts of compatilizer; 1-5 parts of synergist. The PPA resin refers to semi-arom