CN110655762A - Low-odor and high-wear-resistance polyethylene glycol terephthalate composition and preparation method thereof - Google Patents

Low-odor and high-wear-resistance polyethylene glycol terephthalate composition and preparation method thereof Download PDF

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CN110655762A
CN110655762A CN201810713611.9A CN201810713611A CN110655762A CN 110655762 A CN110655762 A CN 110655762A CN 201810713611 A CN201810713611 A CN 201810713611A CN 110655762 A CN110655762 A CN 110655762A
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glass fiber
composition
odor
pyromellitic dianhydride
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杨桂生
吴安琪
范继贤
姚晨光
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Hefei Jieshijie New Materials Co Ltd
Hefei Genius New Materials Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
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    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
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    • 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
    • C08K2201/00—Specific properties of additives
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE

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  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention has provided a low odor, high abrasion-proof polyethylene glycol terephthalate composite and its preparation method, it will be 54-90 parts of polyethylene glycol terephthalate, 1-5 parts of polybutylene terephthalate, 0-5 parts of maleic anhydride, 1-5 parts of odor adsorption master batch, 0.1-0.5 part of wear-resisting agent, 0.2-1.0 part of lubricant, and 0.1-1 part of antioxidant, add into high-speed mixer to stir, add into double screw extruder after mixing; and adding 5-45 parts of pyromellitic dianhydride modified glass fiber from a glass fiber opening of an extruder, and granulating after melt extrusion to prepare the polyethylene terephthalate composition with low odor, low emission and high wear resistance. The compositions prepared according to the invention significantly improve the odor and emission characteristics of the material, making the prepared compositions TVOC less than 40 ugC/g. Meanwhile, the product prepared by the invention has extremely low abrasion index and shows excellent wear resistance.

Description

Low-odor and high-wear-resistance polyethylene glycol terephthalate composition and preparation method thereof
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a low-odor and high-wear-resistance polyethylene terephthalate composition and a preparation method thereof.
Background
Polyethylene terephthalate (PET) is prepared by exchanging dimethyl terephthalate with ethylene glycol or esterifying terephthalic acid with ethylene glycol to synthesize dihydroxy ethyl terephthalate, and then performing polycondensation reaction. It belongs to crystalline saturated polyester, is a milky white or light yellow polymer with high crystallinity, has smooth and glossy surface, and is a common resin in life.
The polyethylene terephthalate has excellent physical and mechanical properties in a wide temperature range, the long-term use temperature of the polyethylene terephthalate can reach 120 ℃, the electrical insulation property is excellent, even under high temperature and high frequency, the electrical property is still good, but the corona resistance is poor, and the creep resistance, the fatigue resistance and the dimensional stability are good.
Although polyethylene terephthalate has many excellent properties, the application of polyethylene terephthalate in some fields with high requirements on odor and wear resistance is greatly limited. There is therefore a need to further reduce the odor, coefficient of friction and wear rate, which needs to be achieved by modification of polyethylene terephthalate.
Disclosure of Invention
The invention aims to provide a low-odor and high-wear-resistance polyethylene terephthalate composition and a preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
a low-odor and high-wear-resistance polyethylene terephthalate composition is prepared from the following components in parts by weight:
Figure BDA0001713612830000011
Figure BDA0001713612830000021
in a further scheme, the odor adsorption master batch is prepared from the following components in parts by weight: 100 parts of high-density polyethylene, 5 parts of hydrophobic diatomite, 10 parts of hydrophobic activated carbon, 5 parts of needle-shaped zeolite molecular sieve, 10 parts of zinc ricinoleate, 5 parts of nano silicon dioxide, 1 part of calcium stearate and 5 parts of melamine.
The high-density polyethylene has the crystallinity of 85 percent and the number average molecular weight of 25 ten thousand.
The wear-resisting agent is prepared from molybdenum disilicide and silicon carbide according to the weight ratio of 1: 15.
The melt index of the polyethylene terephthalate is 25-28g/10min under the condition of 230 ℃/2.16 KG; the melt index of polybutylene terephthalate is 28-30g/10min at 230 ℃/2.16 KG.
The pyromellitic dianhydride modified glass fiber is obtained by soaking glass fiber in pyromellitic dianhydride dispersion liquid for modification treatment.
The pyromellitic dianhydride dispersion is a colloidal solution in which pyromellitic dianhydride resin having an average particle diameter of 0.1 to 0.2 μm is suspended in water, and the colloidal solution has a viscosity of 0.05 pas and a concentration of 60 wt%; the number average molecular weight of the pyromellitic diimide resin is 5 ten thousand, and the elongation at break is 3-10%.
The lubricant is one or a mixture of more of silicone powder, white oil, silicone oil, paraffin, stearic acid and zinc stearate; the antioxidant is a mixture of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010) and tris (2, 4-di-tert-butylphenyl) phosphite (antioxidant 168).
It is another object of the present invention to provide a method for preparing the above composition, which comprises the steps of:
(1) cleaning and drying the glass fiber, soaking the glass fiber in the pyromellitic dianhydride dispersion liquid, taking out the glass fiber, drying the glass fiber, baking the glass fiber at the temperature of 200 ℃, and sintering the glass fiber to obtain the pyromellitic dianhydride modified glass fiber;
(2) uniformly mixing 100 parts of high-density polyethylene, 5 parts of hydrophobic diatomite, 10 parts of hydrophobic activated carbon, 5 parts of needle-shaped zeolite molecular sieve, 10 parts of zinc ricinoleate, 5 parts of nano silicon dioxide, 1 part of calcium stearate and 5 parts of melamine, and then extruding and granulating in a double-screw extruder to obtain odor adsorption master batches;
(3) adding 54-90 parts of polyethylene terephthalate, 1-5 parts of polybutylene terephthalate, 0-5 parts of maleic anhydride, 1-5 parts of odor adsorption master batch, 0.1-0.5 part of wear-resisting agent, 0.2-1.0 part of lubricant and 0.1-1 part of antioxidant into a high-speed stirrer for stirring, and adding into a double-screw extruder after uniformly mixing; and (2) adding 5-45 parts of the pyromellitic dianhydride modified glass fiber treated in the step (1) from a glass fiber opening of an extruder, and granulating after melt extrusion to prepare the polyethylene terephthalate composition with low odor, low emission and high wear resistance.
Further, the temperature of the first zone of the double-screw extruder in the steps (2) and (3) is 190-; the rotating speed of the twin-screw main machine is 500 rpm.
The invention has the beneficial effects that:
1. the invention uses the pyromellitic dianhydride resin with the average particle size of 0.1-0.2 mu m, the number average molecular weight of 5 ten thousand and the breaking elongation of 3-10 percent to suspend in water to form colloidal solution with the viscosity of 0.05 Pa.s and the concentration of 60wt percent to impregnate the glass fiber, thereby solving the technical problems of poor fiber impregnation efficiency, incomplete impregnation, fiber breakage and the like in the impregnation process of the glass fiber. The dispersibility of the glass fiber in the polyethylene terephthalate matrix can be greatly improved, the wear resistance of the prepared polyethylene terephthalate is obviously improved, and the excellent mechanical property is maintained; in addition, the impregnated glass fiber is baked and sintered at 200 ℃, and the problems of serious performance reduction, cracking, breaking, bonding and the like of the glass fiber are caused due to excessively high or low temperature.
2. The melt index of the polyethylene glycol terephthalate is 25-28g/10min under the condition of 230 ℃/2.16 KG; the melt index of polybutylene terephthalate is 28-30g/10min at 230 ℃/2.16 KG. The fluidity of the polyethylene terephthalate melt can be adjusted after the polybutylene terephthalate is added, so that the polyethylene terephthalate is uniformly plasticized and smoothly melted and mixed in the processing process.
3. The mixture of the molybdenum disilicide and the silicon carbide accounts for 0.1 to 0.5 part, so that the serious performance reduction of the composition caused by using a large amount of the mixture of the molybdenum disilicide and the silicon carbide is avoided; the mixture of molybdenum disilicide and silicon carbide plays a very important synergistic role in the wear resistance of the composition.
4. The odor adsorption master batch disclosed by the invention uses high-density polyethylene with the crystallinity of 85% and the number average molecular weight of 25 ten thousand as a matrix, so that the compatibility of the odor adsorption master batch with glass fiber and polyethylene terephthalate can be improved when the odor adsorption master batch is used, and the dispersibility of the master batch in a composition system is ensured.
5. The invention uses the special odor adsorption master batch to reduce the content of small molecules in the composition, so that the total volatile organic compound TVOC is obviously reduced; and various physical and mechanical properties and the molding and processing properties of the material are not influenced while the low-odor characteristic of the composition is ensured.
6. The temperature of the first zone of the double-screw extruder is 190 ℃ minus 180 ℃, the temperature of the second zone is 190 ℃ minus 180 ℃, the temperature of the third zone is 190 ℃ minus 200 ℃, the temperature of the fourth zone is 220 ℃ minus 210 ℃, the temperature of the fifth zone is 300 ℃ minus 230 ℃, and the temperature of the sixth zone is 245 ℃ minus 300 ℃; the rotating speed of the double-screw main machine is 500rpm, and the processing temperature and the rotating speed of the main machine can solve the technical problems of blockage of feeding parts, unsaturated feeding, uneven plasticization, material overflow and the like in the processing process.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
The glass fiber and the odor adsorption master batch in the following embodiments are prepared by the following method:
poly pyromellitic imide modified glass fiber: cleaning and drying the glass fiber, soaking the glass fiber in the pyromellitic dianhydride dispersion liquid, taking out the glass fiber, drying the glass fiber, baking the glass fiber at the temperature of 200 ℃, and sintering the glass fiber to obtain the pyromellitic dianhydride modified glass fiber; wherein the pyromellitic dianhydride dispersion is a colloidal solution of pyromellitic dianhydride resin having an average particle diameter of 0.1 to 0.2 μm suspended in liquid water, the colloidal solution having a viscosity of 0.05 pas and a concentration of 60 wt%. Wherein the number average molecular weight of the pyromellitimide is 5 ten thousand, and the elongation at break is 3-10%.
Preparing the odor adsorption master batch: 100 parts of high-density polyethylene, 5 parts of hydrophobic diatomite, 10 parts of hydrophobic activated carbon, 5 parts of needle-shaped zeolite molecular sieve, 10 parts of zinc ricinoleate, 5 parts of nano silicon dioxide, 1 part of calcium stearate and 5 parts of melamine, uniformly mixing, and then extruding and granulating in a double-screw extruder to obtain the odor adsorption master batch. Wherein the high density polyethylene has 85 percent of crystallinity and 25 ten thousand of number average molecular weight.
The melt index of the polyethylene glycol terephthalate is 25-28g/10 min; the melt index of the polybutylene terephthalate is 28-30g/10 min.
The wear-resisting agent is prepared from molybdenum disilicide and silicon carbide according to the weight ratio of 1: 15, and mixing.
Example 1
Adding 70 parts of polyethylene terephthalate, 1 part of polybutylene terephthalate, 1 part of maleic anhydride, 3 parts of odor adsorption master batch, 0.5 part of wear-resistant agent, 1 part of silicone powder, 0.5 part of antioxidant 1010 and 0.5 part of antioxidant 168 into a high-speed stirrer, stirring at high speed, mixing uniformly, adding into a double-screw extruder, adding 30 parts of pyromellitic dianhydride modified glass fiber from a glass fiber opening, and granulating after melting and extrusion to prepare the low-odor, low-emission and high-wear-resistance polyethylene terephthalate composition.
The first zone temperature of the double-screw extruder is 180 ℃, the second zone temperature is 180 ℃, the third zone temperature is 190 ℃, the fourth zone temperature is 210 ℃, the fifth zone temperature is 230 ℃ and the sixth zone temperature is 245 ℃; the rotating speed of the twin-screw main machine is 500 rpm.
Example 2
Adding 54 parts of polyethylene terephthalate, 2 parts of polybutylene terephthalate, 2 parts of maleic anhydride, 1 part of odor adsorption master batch, 0.2 part of wear-resisting agent, 0.2 part of paraffin, 0.1 part of antioxidant 1010 and 0.1 part of antioxidant 168 into a high-speed stirrer, stirring at a high speed, mixing uniformly, adding into a double-screw extruder, adding 30 parts of poly (pyromellitic dianhydride) modified glass fiber from a glass fiber opening, and granulating after melting and extrusion to prepare the low-odor, low-emission and high-wear-resistance polyethylene terephthalate composition.
The first zone temperature of the double-screw extruder is 190 ℃, the second zone temperature is 190 ℃, the third zone temperature is 200 ℃, the fourth zone temperature is 220 ℃, the fifth zone temperature is 300 ℃ and the sixth zone temperature is 300 ℃; the rotating speed of the twin-screw main machine is 500 rpm.
Example 3
Adding 90 parts of polyethylene terephthalate, 5 parts of polybutylene terephthalate, 5 parts of maleic anhydride, 5 parts of odor adsorption master batch, 0.1 part of wear-resistant agent, 0.5 part of stearic acid, 0.2 part of antioxidant 1010 and 0.3 part of antioxidant 168 into a high-speed stirrer, stirring at high speed, mixing uniformly, adding into a double-screw extruder, adding 20 parts of poly (pyromellitic dianhydride) modified glass fiber from a glass fiber opening, and granulating after melting and extrusion to prepare the low-odor, low-emission and high-wear-resistance polyethylene terephthalate composition.
The first zone temperature of the double-screw extruder is 180 ℃, the second zone temperature is 180 ℃, the third zone temperature is 190 ℃, the fourth zone temperature is 210 ℃, the fifth zone temperature is 230 ℃ and the sixth zone temperature is 245 ℃; the rotating speed of the twin-screw main machine is 500 rpm.
Comparative example 1
Adding common adsorbent active carbon and common wear-resisting agent molybdenum disulfide.
Adding 70 parts of polyethylene terephthalate, 3 parts of activated carbon, 5 parts of molybdenum disulfide, 1 part of silicone powder, 0.5 part of antioxidant 1010 and 0.5 part of antioxidant 168 into a high-speed stirrer, stirring at a high speed, uniformly mixing, adding into a double-screw extruder, adding 30 parts of glass fiber from a glass fiber port, melting, extruding and granulating.
The first zone temperature of the double-screw extruder is 180 ℃, the second zone temperature is 180 ℃, the third zone temperature is 190 ℃, the fourth zone temperature is 210 ℃, the fifth zone temperature is 230 ℃ and the sixth zone temperature is 245 ℃; the rotating speed of the twin-screw main machine is 500 rpm.
The mechanical properties, odor grade, TVOC and abrasion resistance of the polyethylene terephthalate compositions prepared in examples 1-3 and comparative example 1 above were measured, respectively. The mechanical properties are detected by adopting an ASTM standard, the odor grade and TVOC are detected by adopting a GMW standard, the wear resistance is determined according to the standard GB/T5478-2008, and the physical property data is shown in the following table 1.
TABLE 1
Example 1 Example 2 Example 3 Comparative example 1
Tensile strength MPa 146 179 169 81
Notched impact strength KJ/m2 38 36 43 7
Abrasion resistance (750g, 1000r) 0.01 0.01 0.02 0.52
TVOC ugC/g 35 35 33 163
Odor grade Stage 8 Stage 8 Stage 8 Grade 5
As can be seen from the data in Table 1, the odor and emission characteristics of the materials are significantly improved in examples 1-3 of the present invention compared to the activated carbon of comparative example 1 due to the addition of the odor adsorbing master batch, resulting in the preparation of compositions TVOC below 40 ugC/g. In addition, the product prepared by the invention has extremely low abrasion index and shows excellent wear resistance. The invention is characterized in that the weight ratio of molybdenum disilicide to silicon carbide is 1: 15, and the glass fiber dipped by the poly-pyromellitic imide dispersion liquid obviously improves the dispersibility of the glass fiber in the polyethylene glycol terephthalate matrix, so that the composition has the advantages of less addition of the wear-resistant agent, outstanding wear resistance and obviously improved mechanical property.
Example 4
Adding 90 parts of polyethylene terephthalate, 5 parts of polybutylene terephthalate, 5 parts of maleic anhydride, 5 parts of odor adsorption master batch, 0.1 part of wear-resistant agent, 0.5 part of stearic acid, 0.2 part of antioxidant 1010 and 0.3 part of antioxidant 168 into a high-speed stirrer, stirring at high speed, mixing uniformly, adding into a double-screw extruder, adding 5 parts of pyromellitic dianhydride modified glass fiber from a glass fiber opening, and granulating after melting and extrusion to prepare the low-odor, low-emission and high-wear-resistance polyethylene terephthalate composition.
The first zone temperature of the double-screw extruder is 180 ℃, the second zone temperature is 180 ℃, the third zone temperature is 190 ℃, the fourth zone temperature is 210 ℃, the fifth zone temperature is 230 ℃ and the sixth zone temperature is 245 ℃; the rotating speed of the twin-screw main machine is 500 rpm.
Example 5
Adding 90 parts of polyethylene terephthalate, 5 parts of polybutylene terephthalate, 5 parts of maleic anhydride, 5 parts of odor adsorption master batch, 0.1 part of wear-resistant agent, 0.5 part of stearic acid, 0.2 part of antioxidant 1010 and 0.3 part of antioxidant 168 into a high-speed stirrer, stirring at high speed, mixing uniformly, adding into a double-screw extruder, adding 45 parts of poly-pyromellitic diimide modified glass fiber from a glass fiber opening, and granulating after melting and extrusion to prepare the low-odor, low-emission and high-wear-resistance polyethylene terephthalate composition.
The first zone temperature of the double-screw extruder is 180 ℃, the second zone temperature is 180 ℃, the third zone temperature is 190 ℃, the fourth zone temperature is 210 ℃, the fifth zone temperature is 230 ℃ and the sixth zone temperature is 245 ℃; the rotating speed of the twin-screw main machine is 500 rpm.
The embodiments described above are intended to facilitate one of ordinary skill in the art in understanding and using the present invention. It will be readily apparent to those skilled in the art that various modifications can be made to the embodiments and the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make modifications and alterations without departing from the scope of the present invention.

Claims (10)

1. A low-odor and high-abrasion-resistance polyethylene terephthalate composition is characterized in that: the composition is prepared from the following components in parts by weight:
54-90 parts of polyethylene terephthalate
1-5 parts of polybutylene terephthalate
0-5 parts of maleic anhydride
5-45 parts of pyromellitic dianhydride modified glass fiber
1-5 parts of odor adsorption master batch
0.1 to 0.5 portion of wear-resistant agent
0.2 to 1.0 portion of lubricant
0.1-1 part of antioxidant.
2. The composition of claim 1, wherein: the odor adsorption master batch is prepared from the following components in parts by weight: 100 parts of high-density polyethylene, 5 parts of hydrophobic diatomite, 10 parts of hydrophobic activated carbon, 5 parts of needle-shaped zeolite molecular sieve, 10 parts of zinc ricinoleate, 5 parts of nano silicon dioxide, 1 part of calcium stearate and 5 parts of melamine.
3. The composition of claim 2, wherein: the high-density polyethylene has the crystallinity of 85 percent and the number average molecular weight of 25 ten thousand.
4. The composition of claim 1, wherein: the wear-resisting agent is prepared from molybdenum disilicide and silicon carbide according to the weight ratio of 1: 15.
5. The composition of claim 1, wherein: the melt index of the polyethylene terephthalate is 25-28g/10min under the condition of 230 ℃/2.16 KG; the melt index of polybutylene terephthalate is 28-30g/10min at 230 ℃/2.16 KG.
6. The composition of claim 1, wherein: the pyromellitic dianhydride modified glass fiber is obtained by soaking glass fiber in pyromellitic dianhydride dispersion liquid for modification treatment.
7. The composition of claim 6, wherein: the pyromellitic dianhydride dispersion is a colloidal solution in which pyromellitic dianhydride resin having an average particle diameter of 0.1 to 0.2 μm is suspended in water, and the colloidal solution has a viscosity of 0.05 pas and a concentration of 60 wt%; the number average molecular weight of the pyromellitic diimide resin is 5 ten thousand, and the elongation at break is 3-10%.
8. The composition of claim 1, wherein: the lubricant is one or a mixture of more of silicone powder, white oil, silicone oil, paraffin, stearic acid and zinc stearate; the antioxidant is a mixture of tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010) and tris (2, 4-di-tert-butylphenyl) phosphite (antioxidant 168).
9. A method of preparing the composition of claim 1, wherein: comprises the following steps:
(1) cleaning and drying the glass fiber, soaking the glass fiber in the pyromellitic dianhydride dispersion liquid, taking out the glass fiber, drying the glass fiber, baking the glass fiber at the temperature of 200 ℃, and sintering the glass fiber to obtain the pyromellitic dianhydride modified glass fiber;
(2) uniformly mixing 100 parts of high-density polyethylene, 5 parts of hydrophobic diatomite, 10 parts of hydrophobic activated carbon, 5 parts of needle-shaped zeolite molecular sieve, 10 parts of zinc ricinoleate, 5 parts of nano silicon dioxide, 1 part of calcium stearate and 5 parts of melamine, and then extruding and granulating in a double-screw extruder to obtain odor adsorption master batches;
(3) adding 54-90 parts of polyethylene terephthalate, 1-5 parts of polybutylene terephthalate, 0-5 parts of maleic anhydride, 1-5 parts of odor adsorption master batch, 0.1-0.5 part of wear-resisting agent, 0.2-1.0 part of lubricant and 0.1-1 part of antioxidant into a high-speed stirrer for stirring, and adding into a double-screw extruder after uniformly mixing; and (2) adding 5-45 parts of the pyromellitic dianhydride modified glass fiber treated in the step (1) from a glass fiber opening of an extruder, and granulating after melt extrusion to prepare the polyethylene terephthalate composition with low odor, low emission and high wear resistance.
10. The method of claim 9, wherein: in the steps (2) and (3), the temperature of the first zone of the double-screw extruder is 180-; the rotating speed of the twin-screw main machine is 500 rpm.
CN201810713611.9A 2018-06-29 2018-06-29 Low-odor and high-wear-resistance polyethylene glycol terephthalate composition and preparation method thereof Pending CN110655762A (en)

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Application publication date: 20200107