CN103834167A - PPA (Polyphthal-Amide) modified material with high heat resistance and high dimensional stability and preparation method thereof - Google Patents

PPA (Polyphthal-Amide) modified material with high heat resistance and high dimensional stability and preparation method thereof Download PDF

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Publication number
CN103834167A
CN103834167A CN201410113408.XA CN201410113408A CN103834167A CN 103834167 A CN103834167 A CN 103834167A CN 201410113408 A CN201410113408 A CN 201410113408A CN 103834167 A CN103834167 A CN 103834167A
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ppa
temperature
heat resistance
dimensional stability
district
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CN103834167B (en
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牛志宇
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DONGGUAN DEYING PHOTOELECTRIC Co Ltd
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DONGGUAN DEYING PHOTOELECTRIC Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/12—Making granules characterised by structure or composition
    • B29B9/14—Making granules characterised by structure or composition fibre-reinforced
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
    • B29B7/7461—Combinations of dissimilar mixers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/88—Adding charges, i.e. additives
    • B29B7/90—Fillers or reinforcements, e.g. fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
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    • B29B9/12—Making granules characterised by structure or composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
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    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
    • C08K3/016—Flame-proofing or flame-retarding additives
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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Abstract

The invention relates to the technical field of the high polymer materials, and in particular relates to a PPA (Polyphthal-Amide) material with high heat resistance and high dimensional stability and a preparation method thereof. The PPA modified material comprises the following raw materials in parts by weight: 30-60 parts of polyphthalamide, 8-20 parts of polyamide 9T, 10-15 parts of a filling and strengthening agent, 5-8 parts of a main flame retardant, 1-5 parts of an auxiliary flame retardant, 0.3-0.5 part of an antioxidant, 0.4-0.9 part of a lubricant, 0.5-0.9 part of a nucleating agent and 0.5-0.9 part of a shrink resisting agent. The PPA modified material has excellent mechanical strength; the tensile strength and the bending strength of the PPA modified material are improved; the PPA modified material further has high impact resistance and processability; the product is stable in quality, and especially applicable to LED (Light Emitting Diode) support manufacture. The preparation method of the PPA modified material is simple, easy to implement, low in production cost and advantageous for popularization and application.

Description

The PPA of high heat resistance, high-dimensional stability is material modified and preparation method thereof
Technical field
The present invention relates to technical field of polymer materials, relate in particular to the PPA of a kind of high heat resistance, high-dimensional stability material modified and preparation method thereof.
Background technology
Polyphtalamide (Polyphthalamide, PPA) is the semiaromatic polyamide composition taking terephthalic acid or phthalic acid as raw material.PPA is a kind of hemicrystalline thermoplasticity aromatic polyamide, is commonly called as aromatic series high-temperature nylon, and it is a kind of resistant to elevated temperatures material, and fusing point is between 310～325 DEG C.PPA has following fundamental characteristics: 1, as more solid in PA66 hard than fats polymeric amide; 2, lower to the susceptibility of moisture, thermal characteristics is better; 3, resistance to creep, fatigue and chemical resistance are outstanding; 4, the PPA resin of glass strengthening has very high heat-drawn wire (Heat Deflection Temperature, HDT) value, can tolerate the very shortterm effect of high-temperature; 5,, under home condition, PPA resin shows outstanding non-fusibility to aliphatic hydrocarbon, aromatic hydrocarbon, hydrochloric ether, ester, ketone, alcohol and most of aqueous solution conventionally.
Under humid tropical condition, the tensile strength of PPA is higher by 20% than nylon 6, higher than nylon 66; The modulus in flexure of PPA material is higher by 20% than nylon, and hardness is larger, can resist long tensile creep; And the ability of resistance to gasoline, grease resistance and the refrigerant of PPA is also strong than PA; PPA has superior environmental-protecting performance, can reach U.S. FDA level.The water-intake rate of PPA is more much lower than general enhancing PA6 or PA66, even soak in cold water several years, its tensile strength also can keep more than 80%.
Polymeric amide all absorbs certain moisture, causes that plastification and size change.For example PA66, it when relative humidity is 100%, can absorb 8～9% moisture at-5 DEG C, and this makes its second-order transition temperature (Tg) drop to-20 DEG C by 6.5 DEG C, and size increases by 2～3%.Poor because of its dimensional stability, processing is difficulty comparatively, has limited its use range.And the price of existing MODIFIED PP A material is higher, resistance toheat is poor.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, and provide a kind of dimensional stability better, that processing is comparatively easy to the PPA of high heat resistance, high-dimensional stability is material modified and preparation method thereof.
The present invention is achieved through the following technical solutions.
The PPA of a kind of high heat resistance, high-dimensional stability is material modified, and it comprises the raw material of following weight part:
Polyphtalamide 30-60 part
Polyamide 9T 8-20 part
Fill toughener 10-15 part
Main flame retardant 5-8 part
Auxiliary fire retardant 1-5 part
Antioxidant 0.3-0.5 part
Lubricant 0.4-0.9 part
Nucleator 0.5-0.9 part
Shrinkproof aqua 0.5-0.9 part.
Preferably, it comprises the raw material of following weight part:
Polyphtalamide 35-40 part
Polyamide 9T 8-12 part
Fill toughener 10-15 part
Main flame retardant 5-8 part
Auxiliary fire retardant 3-5 part
Antioxidant 0.3-0.5 part
Lubricant 0.4-0.6 part
Nucleator 0.5-0.6 part
Shrinkproof aqua 0.7-0.9 part.
Preferably, it comprises the raw material of following weight part:
Polyphtalamide 55-60 part
Polyamide 9T 15-20 part
Fill toughener 10-15 part
Main flame retardant 5-8 part
Auxiliary fire retardant 1-3 part
Antioxidant 0.3-0.5 part
Lubricant 0.7-0.9 part
Nucleator 0.7-0.9 part
Shrinkproof aqua 0.5-0.6 part.
More preferably, it comprises the raw material of following weight part:
58 parts of polyphtalamides
15 parts of polyamide 9Ts
Fill 15 parts of tougheners
8 parts of main flame retardants
2 parts of auxiliary fire retardants
0.5 part of antioxidant
0.9 part of lubricant
0.8 part of nucleator
0.5 part, shrinkproof aqua.
Wherein, described filling toughener is long glass fiber; Described main flame retardant is antimonous oxide; Described auxiliary fire retardant is aluminium hydroxide or magnesium hydroxide; Described antioxidant is antioxidant 1098; Described lubricant oxidation polyethylene wax; Described nucleator is the special nucleator P22 of nylon; Described shrinkproof aqua is the shrinkproof aqua of polymeric amide.
The shrinkproof aqua of polymeric amide is made by nano-scale fiber, effectively improve the crystallization of polymeric amide, promote the mechanical property of material, thermal characteristics and processing characteristics, it has following characteristics: 1, high-crystallinity makes the mechanical property of material, thermal characteristics is increased dramatically, 2, significantly promote the resist displacement ability of stablizing, the anti-warpage performance of dimensional stabilizing is outstanding, improve product size stability, 3, the crystallization rate being exceedingly fast, product approval stability is improved, shorten shaping cycle, enhance productivity, demolding performace excellence (formed product time shorten 30%-50%), 4, reduce goods post shrinkage, prevent goods stress cracking, promote and improve product surface glossiness, 5, pass through food, pharmaceutical grade certification, meet compared with high-environmental requirement, 6, excellent surface treatment, surface can efficiently, impel nano material to be dispersed in material, do not reunite, overcoming material easily reunites, disperse an inhomogeneous difficult problem, discharge nano effect completely.The shrinkproof aqua of polymeric amide of the optional model GSC-3239 with Dongguan City GaoSun Chemical Co., Ltd. of the shrinkproof aqua of polymeric amide.
Further, it also comprises the titanium dioxide of 1-3 weight part.Described titanium dioxide is colloidal titanium white powder, and size is 1500-4000 order.Titanium dioxide is a kind of allotropic substance of carbon, and chemical stability is good, and matter is soft, and electrical and thermal conductivity is good, has lubricated effect.Titanium dioxide has good optical absorption characteristics, can effectively absorb light, reduces the transparence of PPA of the present invention.
Further, it also comprises the UV light absorber UV-234 of 0.1-0.3 weight part.UV light absorber UV-234 is a kind of efficient protective agent, can absorb UV-light, has that look shallow is, nontoxic, consistency is good, transport property is little, be easy to the features such as processing.It has maximum provide protection to polymkeric substance, and contributes to reduce look change, delays and the blocker rationality loss of energy simultaneously.UV light absorber UV-234 and oxidation inhibitor 1098 act synergistically, and can significantly promote ageing-resistant performance of the present invention, extend product work-ing life.
The material modified preparation method of PPA of high heat resistance, high-dimensional stability, it is made up of following methods step:
A, take raw material by weight, and described raw material is carried out respectively to drying treatment; 120 DEG C-140 DEG C of polyphtalamide drying treatment temperature, drying treatment time 3-4h, 105 DEG C-115 DEG C of polyamide 9T drying treatment temperature, drying treatment time 3-4h;
B, dried polyphtalamide and polyamide 9T are added in high-speed mixer, and add except the surplus stock of filling toughener, carry out high-speed mixing 10-15min, the material mixing is put into 100-110 DEG C of dry 2-3h in loft drier;
C, will fully mix and dry raw material is put in twin screw extruder, add and fill toughener and strengthens filling extruding pelletization, the PPA that makes high heat resistance, high-dimensional stability is material modified.
Wherein, in described step C, each section of Temperature Setting of twin screw extruder is: 280～295 DEG C of district's temperature, two 270～280 DEG C of district's temperature, three 270～280 DEG C of district's temperature, four 270～280 DEG C of district's temperature, five 270～280 DEG C of district's temperature, six 270～280 DEG C of district's temperature, seven 270～280 DEG C of district's temperature, eight 270～280 DEG C of district's temperature, head temperature is 280～295 DEG C.
Wherein, in described step C, well-mixed raw material is 300-600 rev/min at the rotating speed of described duplex forcing machine, and twin screw extruder internal pressure is 12～18MPa.
Beneficial effect of the present invention: the present invention introduces polyamide 9T, polyamide 9T can merge with polyphtalamide material well, thereby increases its mobility, and the course of processing is simplified; The present invention is rationally composite by each raw material, obtain the PPA material of excellent combination property, it is heat-resisting good, difficult combustion, have splendid physical strength, tensile strength, flexural strength are improved, and also have stronger shock resistance and processing characteristics, have anti-aging and translucent effect concurrently, constant product quality simultaneously.The price of PPA material prepared by the present invention is 20,000 yuan/ton of left and right, reduces more than 67% than ten thousand yuan/ton of the 6-8 of existing PPA material, greatly reduces production costs, and cost performance is high, is convenient to promote and recycle, and is particularly useful for the application in LED support is manufactured.
The material modified preparation method of PPA of a kind of high heat resistance of the present invention, high-dimensional stability, preparation method is simple, is easy to processing, and production cost is low, is conducive to generally apply.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
embodiment 1.
The PPA of a kind of high heat resistance, high-dimensional stability is material modified, and it comprises the raw material of following weight part: 30 parts of polyphtalamides, 20 parts of polyamide 9Ts, fill 0.5 part of 10 parts of toughener long glass fiber, 8 parts of main flame retardant antimonous oxides, 1 part, auxiliary fire retardant aluminium hydroxide, 1,098 0.5 parts of antioxidants, 0.4 part of lubricant oxidation polyethylene wax, the special nucleator P220.9 of nylon part, the shrinkproof aqua of polymeric amide.
The material modified preparation method of PPA of high heat resistance, high-dimensional stability, it is made up of following methods step:
A, take raw material by weight, and described raw material is carried out respectively to drying treatment; 120 DEG C of polyphtalamide drying treatment temperature, drying treatment time 4h, 105 DEG C of polyamide 9T drying treatment temperature, drying treatment time 4h;
B, dried polyphtalamide and polyamide 9T are added in high-speed mixer, and add except the surplus stock of filling toughener, carry out high-speed mixing 10min, the material mixing is put into 110 DEG C of dry 2-h in loft drier;
C, will fully mix and dry raw material is put in twin screw extruder, add and fill toughener and strengthens filling extruding pelletization, the PPA that makes high heat resistance, high-dimensional stability is material modified.
Wherein, in described step C, each section of Temperature Setting of twin screw extruder is: 280 DEG C of district's temperature, two 270 DEG C of district's temperature, three 270 DEG C of district's temperature, four 270 DEG C of district's temperature, five 270 DEG C of district's temperature, six 270 DEG C of district's temperature, seven 270 DEG C of district's temperature, eight 270 DEG C of district's temperature, head temperature is 280 DEG C.
Wherein, in described step C, well-mixed raw material is 300 revs/min at the rotating speed of described duplex forcing machine, and twin screw extruder internal pressure is 18MPa.
embodiment 2.
The PPA of a kind of high heat resistance, high-dimensional stability is material modified, and it comprises the raw material of following weight part: 40 parts of polyphtalamides, 12 parts of polyamide 9Ts, fill 10 parts of toughener long glass fibers, 8 parts of main flame retardant antimonous oxides, 3 parts of auxiliary fire retardant magnesium hydroxides, 1,098 0.5 parts of antioxidants, 0.4 part of lubricant oxidation polyethylene wax, 0.6 part of the special nucleator P22 of nylon, 0.7 part, the shrinkproof aqua of polymeric amide, 2 parts of titanium dioxides.
The material modified preparation method of PPA of high heat resistance, high-dimensional stability, it is made up of following methods step:
A, take raw material by weight, and described raw material is carried out respectively to drying treatment; 125 DEG C of polyphtalamide drying treatment temperature, drying treatment time 3.5h, 110 DEG C of polyamide 9T drying treatment temperature, drying treatment time 3.5h;
B, dried polyphtalamide and polyamide 9T are added in high-speed mixer, and add except the surplus stock of filling toughener, carry out high-speed mixing 12min, the material mixing is put into 105 DEG C of dry 2.5h in loft drier;
C, will fully mix and dry raw material is put in twin screw extruder, add and fill toughener and strengthens filling extruding pelletization, the PPA that makes high heat resistance, high-dimensional stability is material modified.
Wherein, in described step C, each section of Temperature Setting of twin screw extruder is: 285 DEG C of district's temperature, two 275 DEG C of district's temperature, three 275 DEG C of district's temperature, four 275 DEG C of district's temperature, five 275 DEG C of district's temperature, six 275 DEG C of district's temperature, seven 275 DEG C of district's temperature, eight 275 DEG C of district's temperature, head temperature is 285 DEG C.
Wherein, in described step C, well-mixed raw material is 350 revs/min at the rotating speed of described duplex forcing machine, and twin screw extruder internal pressure is 14MPa.
embodiment 3.
The PPA of a kind of high heat resistance, high-dimensional stability is material modified, and it comprises the raw material of following weight part: 55 parts of polyphtalamides, 20 parts of polyamide 9Ts, fill 15 parts of toughener long glass fibers, 5 parts of main flame retardant antimonous oxides, 1 part, auxiliary fire retardant aluminium hydroxide, 1,098 0.5 parts of antioxidants, 0.7 part of lubricant oxidation polyethylene wax, 0.7 part of the special nucleator P22 of nylon, 0.5 part, the shrinkproof aqua of polymeric amide, 1 part of titanium dioxide, 0.2 part of UV light absorber UV-234.
The material modified preparation method of PPA of high heat resistance, high-dimensional stability, it is made up of following methods step:
A, take raw material by weight, and described raw material is carried out respectively to drying treatment; 130 DEG C of polyphtalamide drying treatment temperature, drying treatment time 3.6h, 110 DEG C of polyamide 9T drying treatment temperature, drying treatment time 3.6h;
B, dried polyphtalamide and polyamide 9T are added in high-speed mixer, and add except the surplus stock of filling toughener, carry out high-speed mixing 13min, the material mixing is put into 105 DEG C of dry 2.5h in loft drier;
C, will fully mix and dry raw material is put in twin screw extruder, add and fill toughener and strengthens filling extruding pelletization, the PPA that makes high heat resistance, high-dimensional stability is material modified.
Wherein, in described step C, each section of Temperature Setting of twin screw extruder is: 290 DEG C of district's temperature, two 280 DEG C of district's temperature, three 280 DEG C of district's temperature, four 280 DEG C of district's temperature, five 280 DEG C of district's temperature, six 280 DEG C of district's temperature, seven 280 DEG C of district's temperature, eight 280 DEG C of district's temperature, head temperature is 285 DEG C.
Wherein, in described step C, well-mixed raw material is 400 revs/min at the rotating speed of described duplex forcing machine, and twin screw extruder internal pressure is 16MPa.
embodiment 4.
The PPA of a kind of high heat resistance, high-dimensional stability is material modified, and it comprises the raw material of following weight part: 58 parts of polyphtalamides, 15 parts of polyamide 9Ts, fill 15 parts of toughener long glass fibers, 8 parts of main flame retardant antimonous oxides, 2 parts of auxiliary fire retardant magnesium hydroxides, 1,098 0.5 parts of antioxidants, 0.9 part of lubricant oxidation polyethylene wax, 0.8 part of the special nucleator P22 of nylon, 0.5 part, the shrinkproof aqua of polymeric amide, 0.3 part of UV light absorber UV-234.
The material modified preparation method of PPA of high heat resistance, high-dimensional stability, it is made up of following methods step:
A, take raw material by weight, and described raw material is carried out respectively to drying treatment; 135 DEG C of polyphtalamide drying treatment temperature, drying treatment time 4h, 115 DEG C of polyamide 9T drying treatment temperature, drying treatment time 4h;
B, dried polyphtalamide and polyamide 9T are added in high-speed mixer, and add except the surplus stock of filling toughener, carry out high-speed mixing 14min, the material mixing is put into 110 DEG C of dry 3h in loft drier;
C, will fully mix and dry raw material is put in twin screw extruder, add and fill toughener and strengthens filling extruding pelletization, the PPA that makes high heat resistance, high-dimensional stability is material modified.
Wherein, in described step C, each section of Temperature Setting of twin screw extruder is: 295 DEG C of district's temperature, two 280 DEG C of district's temperature, three 280 DEG C of district's temperature, four 280 DEG C of district's temperature, five 280 DEG C of district's temperature, six 280 DEG C of district's temperature, seven 280 DEG C of district's temperature, eight 280 DEG C of district's temperature, head temperature is 290 DEG C.
Wherein, in described step C, well-mixed raw material is 500 revs/min at the rotating speed of described duplex forcing machine, and twin screw extruder internal pressure is 17MPa.
embodiment 5.
The PPA of a kind of high heat resistance, high-dimensional stability is material modified, and it comprises the raw material of following weight part: 60 parts of polyphtalamides, 8 parts of polyamide 9Ts, fill 15 parts of toughener long glass fibers, 5 parts of main flame retardant antimonous oxides, 5 parts of auxiliary fire retardant magnesium hydroxides, 1,098 0.3 parts of antioxidants, 0.9 part of lubricant oxidation polyethylene wax, 0.5 part of the special nucleator P22 of nylon, 0.9 part, the shrinkproof aqua of polymeric amide.
The material modified preparation method of PPA of high heat resistance, high-dimensional stability, it is made up of following methods step:
A, take raw material by weight, and described raw material is carried out respectively to drying treatment; 140 DEG C of polyphtalamide drying treatment temperature, drying treatment time 3.8h, 115 DEG C of polyamide 9T drying treatment temperature, drying treatment time 4h;
B, dried polyphtalamide and polyamide 9T are added in high-speed mixer, and add except the surplus stock of filling toughener, carry out high-speed mixing 15min, the material mixing is put into 108 DEG C of dry 2.8h in loft drier;
C, will fully mix and dry raw material is put in twin screw extruder, add and fill toughener and strengthens filling extruding pelletization, the PPA that makes high heat resistance, high-dimensional stability is material modified.
Wherein, in described step C, each section of Temperature Setting of twin screw extruder is: district's temperature 290～DEG C, two 280 DEG C of district's temperature, three 280 DEG C of district's temperature, four 280 DEG C of district's temperature, five 280 DEG C of district's temperature, six 280 DEG C of district's temperature, seven 280 DEG C of district's temperature, eight 280 DEG C of district's temperature, head temperature is 290 DEG C.
Wherein, in described step C, well-mixed raw material is 600 revs/min at the rotating speed of described duplex forcing machine, and twin screw extruder internal pressure is 18MPa.
High heat resistance prepared by embodiment 1 ~ embodiment 5, the PPA of high-dimensional stability is material modified tests, in table 1.
Table 1.
Figure 654899DEST_PATH_IMAGE001
。
By table 1, can find out, excellent combination property of the present invention, it is heat-resisting good, has splendid physical strength, and tensile strength, flexural strength are improved, and also have stronger shock resistance and processing characteristics, constant product quality.
Finally should be noted that; above embodiment is only in order to illustrate technical scheme of the present invention; but not limiting the scope of the invention; although the present invention has been done to explain with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.

Claims (10)

1. the PPA of a high heat resistance, high-dimensional stability is material modified, it is characterized in that: it comprises the raw material of following weight part:
Polyphtalamide 30-60 part
Polyamide 9T 8-20 part
Fill toughener 10-15 part
Main flame retardant 5-8 part
Auxiliary fire retardant 1-5 part
Antioxidant 0.3-0.5 part
Lubricant 0.4-0.9 part
Nucleator 0.5-0.9 part
Shrinkproof aqua 0.5-0.9 part.
2. the PPA of a kind of high heat resistance according to claim 1, high-dimensional stability is material modified, it is characterized in that: it comprises the raw material of following weight part:
Polyphtalamide 35-40 part
Polyamide 9T 8-12 part
Fill toughener 10-15 part
Main flame retardant 5-8 part
Auxiliary fire retardant 3-5 part
Antioxidant 0.3-0.5 part
Lubricant 0.4-0.6 part
Nucleator 0.5-0.6 part
Shrinkproof aqua 0.7-0.9 part.
3. the PPA of a kind of high heat resistance according to claim 1, high-dimensional stability is material modified, it is characterized in that: it comprises the raw material of following weight part:
Polyphtalamide 55-60 part
Polyamide 9T 15-20 part
Fill toughener 10-15 part
Main flame retardant 5-8 part
Auxiliary fire retardant 1-3 part
Antioxidant 0.3-0.5 part
Lubricant 0.7-0.9 part
Nucleator 0.7-0.9 part
Shrinkproof aqua 0.5-0.6 part.
4. the PPA of a kind of high heat resistance according to claim 1, high-dimensional stability is material modified, it is characterized in that: it comprises the raw material of following weight part:
58 parts of polyphtalamides
15 parts of polyamide 9Ts
Fill 15 parts of tougheners
8 parts of main flame retardants
2 parts of auxiliary fire retardants
0.5 part of antioxidant
0.9 part of lubricant
0.8 part of nucleator
0.5 part, shrinkproof aqua.
5. material modified according to the PPA of a kind of high heat resistance described in claim 1 ~ 4 any one, high-dimensional stability, it is characterized in that: described filling toughener is long glass fiber; Described main flame retardant is antimonous oxide; Described auxiliary fire retardant is aluminium hydroxide or magnesium hydroxide; Described antioxidant is antioxidant 1098; Described lubricant is oxidized polyethlene wax; Described nucleator is the special nucleator P22 of nylon; Described shrinkproof aqua is the shrinkproof aqua of polymeric amide.
6. the PPA of a kind of high heat resistance according to claim 1, high-dimensional stability is material modified, it is characterized in that: it also comprises the titanium dioxide of 1-3 weight part.
7. the PPA of a kind of high heat resistance according to claim 1, high-dimensional stability is material modified, it is characterized in that: it also comprises the UV light absorber UV-234 of 0.1-0.3 weight part.
8. the material modified preparation method of PPA of a kind of high heat resistance described in claim 1-7 any one, high-dimensional stability, is characterized in that: it is made up of following methods step:
A, take raw material by weight, and described raw material is carried out respectively to drying treatment; 120 DEG C-140 DEG C of polyphtalamide drying treatment temperature, drying treatment time 3-4h, 105 DEG C-115 DEG C of polyamide 9T drying treatment temperature, drying treatment time 3-4h;
B, dried polyphtalamide and polyamide 9T are added in high-speed mixer, and add except the surplus stock of filling toughener, carry out high-speed mixing 10-15min, the material mixing is put into 100-110 DEG C of dry 2-3h in loft drier;
C, will fully mix and dry raw material is put in twin screw extruder, add and fill toughener and strengthens filling extruding pelletization, the PPA that makes high heat resistance, high-dimensional stability is material modified.
9. the material modified preparation method of PPA of a kind of high heat resistance according to claim 8, high-dimensional stability, it is characterized in that: in described step C, each section of Temperature Setting of twin screw extruder is: 280～295 DEG C of district's temperature, two 270～280 DEG C of district's temperature, three 270～280 DEG C of district's temperature, four 270～280 DEG C of district's temperature, five 270～280 DEG C of district's temperature, six 270～280 DEG C of district's temperature, seven 270～280 DEG C of district's temperature, eight 270～280 DEG C of district's temperature, head temperature is 280～295 DEG C.
10. the material modified preparation method of PPA of a kind of high heat resistance according to claim 9, high-dimensional stability, it is characterized in that: in described step C, well-mixed raw material is 300-600 rev/min at the rotating speed of described duplex forcing machine, and twin screw extruder internal pressure is 12～18MPa.
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